Lubrication device

Abstract

A lubrication device for lubricating traveling lubrication sites, such as on a belt (1), in particular, on a roller or chain belt (1). The lubrication device includes a lubricating apparatus (2) having a catch (C) that is capable of assuming a resting position and a catching position relative to the belt (1). In the catching position, a lubricating head (D) of the lubricating apparatus (2) is moved to a lubrication site by relative lateral motion between belt (1) and the lubricating apparatus (2) in order to supply lubricant to the lubrication site. At the end of the run path the lubricating head (D) as well as the catch (C) moves relative to the belt (1) to return back to the resting position. Also, before or simultaneously with bringing the catch (C) into engagement with the belt (1), the lubricating apparatus (2) can be extended in a longitudinal direction of the lubrication site motion at a boosting speed, which is greater than zero and less than the speed of the belt (1).

Description

[0001] The invention relates to a lubrication device for lubricating traveling lubrication sites, such as those on a belt, in particular a roller or chain belt, which comprises a lubricating apparatus, supported so as to be displaceable back and forth in the longitudinal direction of the lubrication site motion, which comprises a catch assuming a resting position and a catching position relative to the belt or the like arrangement having the lubrication sites, with the belt or the like driving [along] the catch in the catching position and thus drives [along] lubricating apparatus over a predetermined run path at the speed of the belt or the like, on which a lubricating head through a lateral relative motion between belt or the like and lubricating apparatus can be moved to a lubrication site and lubricant can be supplied to it, wherein at the end of the run path the lubricating head as well as also the catch relative to the belt or the like return into the particular resting position and the lubricating apparatus can be moved back along the belt or the like into its starting position.

[0002] With such known lubrication devices, difficulties occur with lubrication site speeds above a predetermined limit value, for example of 0.4 m/sec, since the large acceleration forces occurring therein lead to the failure of the catch.

[0003] It is the task of the present invention to propose a lubrication device of the above described type, which can be employed even with relatively high lubrication site speeds.

[0004] This task is solved according to the invention with a lubrication device of the above described type, for example thereby that before or simultaneously with the engagement of the catch and the belt or the like, the lubricating apparatus can be extended in the longitudinal direction of the lubrication site motion at a boosting speed which is greater than zero and less than the speed of the belt or the like.

[0005] In this way it is possible to ensure that the speed difference between the lubrication sites and the lubricating apparatus before the lubricating process is not greater than the maximum speed below which a failure of the catch must be apprehended.

[0006] It has been found in practice that the boosting speed of the lubricating apparatus should be no less than a predetermined maximum difference, such as for example 0.4 m/sec, than the speed of the belt or the like. The difference speed is thus no greater than the permissible value of 0.4 m/sec.

[0007] Under these conditions, the boosting speed of the lubricating apparatus is preferably no more than a predetermined maximum value, such as for example 0.4 m/sec. If the belt or the like runs slower than the lubricating apparatus accelerated to the boosting speed, in the end position of the acceleration device, for example an acceleration cylinder, it stops and waits until it is driven [along] by the belt or the like in the conventional manner. Since the lubrication site speed in this case is less than approximately 0.4 m/sec, problems cannot be encountered with the catch.

[0008] In a special implementation of the invention, the boosting motion of the lubricating apparatus takes place by means of an acceleration device, such as an acceleration cylinder or a setting motor, if appropriate, against the effect of a return cylinder in order to avoid the rebounding of the catch from the belt or the like.

[0009] In further implementation of the invention, the boosting speed of the lubricating apparatus can be set, if appropriate, by means of a one-way restrictor valve, in order to be able to adapt readily the lubrication device to the particular conditions.

[0010] The acceleration cylinder preferably becomes pressure-free as soon as the lubricating head starts with the delivery of the lubricant. After reaching the predetermined boosting speed of, for example, 0.4 m/sec, the lubricating apparatus in conventional manner is driven [along] by. the belt or the like under the action of the catch and accelerated for example to 0.8 m/sec.

[0011] A further characteristic of the invention can comprise that during the return motion of the lubricating apparatus along the belt or the like into the starting position, the acceleration cylinder can simultaneously be movable free of pressure into the starting position. The lubrication device in this case is ready for a new lubricating operation.

[0012] The speed of the return motion of the lubricating apparatus can therein be settable, if appropriate, by means of a one-way restrictor valve on the return cylinder.

[0013] It has been found in practice that the counter pressure of the return cylinder during the forward motion of the lubricating apparatus is approximately 0.5 bar and the return pressure of the return cylinder during the back motion of the lubricating apparatus along the belt or the like is approximately 6 bar.

[0014] A further independent concept of the invention comprises that with a lubrication device of said type the lubricating apparatus comprising the lubricating head, together with the catch and preferably with its aid, is movable laterally to the belt or the like perpendicularly to it. But it is also possible that the belt or the like is movable, preferably with the aid of the catch, which is movable jointly with the lubricating apparatus along the belt or the like, transversely to the longitudinal direction of the lubrication site motion in the direction toward the lubricating head. With the aid of the catch, thus, the lubrication site to be lubricated is brought close to the lubricating head while it is laterally immovable or, conversely, the lubricating head to the lubrication site.

[0015] The catch can comprise, for example, a catch arm which engages from above or below the elements of a roller or chain belt. This can take place in particular by swivelling-in.

[0016] The catch arm therein has preferably at its outer end a fork-shaped forming for the purpose of engaging over a roller or chain link axle.

[0017] In the event of malfunction, it is useful that the catch arm can be swung in the direction of motion of the roller or chain link axle, over which by way of example it engages, out of its path of motion. In this way, while the roller or chain belt is continuing to run, the catch is perforce stopped from functioning.

[0018] Known lubrication devices of this type are adapted specifically to the particular application case. Fast and flexible adaptation of the lubrication arrangement to modified roller or chain belts with lubrication sites at varying spacings is not possible. In addition, only one lubrication site can always be supplied with lubricant in one lubricating cycle, which is of disadvantage in particular with chain belts with double bearing roller pairs.

[0019] It is therefore the task of a further invention to provide a lubrication device of the above described type which can be adapted in simple manner to different lubrication site distributions of lubrication site numbers.

[0020] This task is solved according to the invention in a lubrication device of the above described type for example thereby that two sensors are provided spaced apart from another in the direction of motion of the belt or the like, whose signals are drawn on for detecting two lubrication sites disposed at a spacing from one another in the longitudinal direction of the belt or the like, and that for the supply of both lubrication sites at least two lubricating heads are provided disposed at their spacing.

[0021] The invention entails the advantage that, for example, roller or chain belts with uniformly distributed lubrication sites, as well as also roller or chain belts with varying lubrication site numbers and/or spacing and with individual support roll pairs, as well as also with double support roller pairs can automatically be lubricated.

[0022] It is of advantage if the spacing of the two sensors agrees substantially with the spacing of successive lubrication sites of the belt or the like since, in this case, the signals of both sensors occur substantially concurrently.

[0023] A further characteristic of the invention comprises that the spacing of the sensors one from the other is settable in order to be able to be adapted to different belts or the like to be lubricated. Similar applies to the lubricating head spacing.

[0024] A further invention [sic] comprises the conception to provide, in a lubrication device of the above described type, at least two lubricating heads which, with respect to the belt or the like, are opposing one another, which from their respective sides can be moved in the direction toward the lubrication sites of the belt or the like synchronously toward and, if appropriate, also away from it, such that the charging forces, resulting from the lubrication pressure onto the lubricating apparatus and the belt or the like, can be equalized.

[0025] Lubrication which is especially optimized with respect to time is brought about if the lubricating apparatus comprises two pairs of lubricating heads, which can be moved under control pairwise in the direction toward the lubrication sites of the belt or the like toward and away from it. Such a lubrication device is in particular suitable for the lubrication of belts or the like with double support roller pairs.

[0026] If the lubricating heads are disposed jointly on a carriage, this permits the common acceleration of the lubricating heads, before these have been set onto the lubrication site; this carriage should in this case also support the catch.

[0027] A further characteristic of the invention comprises that the lubricating heads are disposed substantially mirror-symmetrically to the belt or the like disposed between them.

[0028] In particular for the lubrication of belts or the like, which apart from the bearing rollers also comprise guidance rollers, whose axes of rotation are disposed at an angle, preferably perpendicularly, to the axes of rotation of the bearing rollers, it is advantageous if the lubrication sites of the guidance rollers can be lubricated with a lubrication device according to DE 200 15 780 U.

[0029] Further goals, characteristics, advantages and application feasibilities of the invention are evident in the following description of embodiment examples in conjunction with the drawing. All described and/or graphically represented characteristics each by itself or in any combination form the subject matter of the present invention, also independently of their compilation in individual claims or their reference back.

[0030] In the drawing depict:

[0031] FIG. 1 schematically a lubrication device comprising a first inventive conception,

[0032] FIG. 2 aa lubricating apparatus according to a first inventive conception with a catch disposed thereon in the position toward a lubrication site before the engagement of the catch into a chain,

[0033] FIG. 2 b a representation corresponding to FIG. 2a, with the catch now being swivelled into the chain belt,

[0034] FIG. 2 ca side view of a chain belt to be lubricated, with the catch assuming the position of FIG. 2b,

[0035] FIG. 2 d a representation corresponding to FIG. 2c, however with the catch arm of the catch being swivelled out of the path of motion of the chain link axle 6 in the direction of motion of the chain belt,

[0036] FIG. 3 aa representation corresponding to FIG. 2a for a different embodiment of the lubricating apparatus which is laterally immovable, but, instead, the chain belt is laterally displaceable,

[0037] FIG. 3 b a representation corresponding to FIG. 2b for a lubricating apparatus with the catch corresponding to FIG. 3a, whereby a catch arm is swivelled over a chain link axle and the corresponding chain link comprising the lubrication site to be lubricated, is laterally displaced in the direction toward the lubricating head of the lubricating apparatus,

[0038] FIG. 3 ca representation corresponding to FIG. 2c for a lubricating apparatus according to FIG. 3a,

[0039] FIG. 3 d a representation corresponding to FIG. 2d for a lubricating apparatus corresponding to FIG. 3a,

[0040] FIG. 4 schematically a lubrication device comprising a further inventive conception,

[0041] FIG. 5 a lubricating apparatus according to a further inventive conception with several lubricating heads in a starting position in a view from below,

[0042] FIG. 6 a side view of the lubricating apparatus according to FIG. 2,

[0043] FIG. 7 a switching plan for the embodiment according to FIGS. 2 and 3,

[0044] FIG. 8 a chain belt to be lubricated in side view (broken),

[0045] FIG. 9 the chain belt according to FIG. 5 in top view, and

[0046] FIG. 10 schematically a lubrication device in basic position comprising a further inventive conception.

[0047] The graphically represented lubrication device serves for lubricating traveling lubrication sites, for example on a roller and chain belt 1. To supply the lubrication device, lubricant is supplied from a central lubrication pump. The driving of the pump takes place via a pressure switch 51 with two switching points: p≦pmin (pump on) and p≧pmax (pump off). At the beginning of the lubrication process, a proximity switch S5 is switched in order to indicate the operational readiness of the lubrication device.

[0048] A proximity switch S4 acquires inductively the position of a traveling lubrication site, for example a tread roller, which is to be lubricated, and switches therein a 3/2-way valve Y1. Thereby air pressure is placed onto a catch cylinder B and a catch C is moved out. The sequence of the lubricating processes, i.e. whether or not, for example, every tread roller or every second tread roller and the like are to be lubricated, depends on the number of the tread rollers and on the speed of the chain or roller belt or the roller spacing.

[0049] The tread roller to be lubricated subsequently intercepts the catch C and therein moves the lubricating apparatus 2 parallel to the tread roller in order to carry out the lubrication process. For this purpose, the lubricating apparatus 2 is disposed on a carriage F, which is supported on a frame G so as to be readily displaceable. In order for the carriage F to be moving jointly with the tread roller in control and not by jerks, a return cylinder A is acted upon with a preset damping pressure via a pressure regulator H.

[0050] During the motion process a (not shown) switching element intercepts a proximity switch S6 and switches a 3/2-way valve Y2. Thereby an air pressure acts upon a lubricating head cylinder E, such that a lubricating head D is moved out toward the lubrication site developed, for example, as a lubricating nipple. By pressing the lubricating head D onto the roller nipple a piston delivers the lubricant from a prefilled dosing chamber to the lubrication site.

[0051] When the switching element departs the proximity switch S6, the 3/2-way valve Y2 is moved again into the resting position. A reset spring of the lubricating head cylinder E moves the lubricating head D back into its starting position. A central supply pump fills the dosing chamber with lubricant for the next delivery stroke.

[0052] When the switching element reaches a proximity switch S7, it switches a 3/2-way valve Y1 again into tits starting position. A reset spring of the catch cylinder B moves the catch C back into a starting position. With the aid of a fast venting valve, fast resetting can be accomplished.

[0053] When the catch C has reached its starting position, a proximity switch S8 switches the valve Y3. In this way, compressed air acts onto the double-action return cylinder A and the damping pressure, which was generated in the forward motion of the lubricating apparatus 2, is switched off. The lubricating apparatus 2 moves back into its starting position. The return speed can be regulated via a choke valve E.

[0054] A possibly provided position switch (roller-lever switch) S2 has safety functions: in the event of failure or too sluggish an evaluation of the proximity switch S7, the switching element actuates the position switch S2. In this case all valves are switched to be voltage-free and the lubricating apparatus 2 remains in its end position. In order to avoid damage through automatic return transport, the lubricating apparatus 2 must be manually brought out of the end position. After the malfunction has been resolved, the lubricating apparatus 2 subsequently moves automatically back into the starting position.

[0055] According to the invention, the carriage F, which carries the lubricating apparatus 2, is engaged by an acceleration cylinder (boost cylinder) J. It is controlled by means of a valve such that before or simultaneously with the extending-out of the catch C a boosting phase of the carriage F, and thus the lubricating apparatus 2, takes place. The sensor control is thus such that the belt 1 at speeds greater than a predetermined maximum speed, for example greater than 0.4 m/sec, meets the catch C within a predetermined boosting path. The carriage F is therein moved with a boosting speed, settable through the one-way restrictor valve, of, for example, 0.4 m/sec parallel to belt 1. From the outset the return cylinder A acts with approximately 0.5 bar against the carriage motion, in order to prevent the rebounding of catch C from belt 1. Approximately 10 mm after the end of the boosting path the proximity switch S6 actuates the lubricating head D, whereby the lubricating process is initiated. Simultaneously the acceleration cylinder J becomes pressure-free. After the delivery phase of the lubricant to belt 1, the proximity switch S6 allows the lubricating head D to move back. Simultaneously, the prepressure or the contact pressure of 0.5 bar by means of an additional valve against the carriage motion is discharged. After a short delay time, the catch C also moves back, which in its end position actuates the proximity switch S8 and thus initiates the return of carriage F. During the return of carriage F, the pressure-free acceleration cylinder J is also moved into the end position. With a one-way restrictor valve I on return cylinder A the return speed can be set.

[0056] When carriage F is again in the starting position, sensor S5 is actuated, which reduces the full return pressure of approximately 6 bars by change-over switching via a pressure reducer by means of an additional valve to the contact pressure of 0.5 bar. Therewith, the lubrication device is again in the starting position.

[0057] According to FIGS. 2a to 2d the lubricating apparatus 2 is displaceable with the aid of a carriage F comprising rollers 3 laterally perpendicularly to the direction of motion of a chain belt 1 guided bilaterally in a track 10, such that the lubricating head D can be brought into and out of engagement with the lubrication site to be lubricated. The lubricating apparatus 2 supports a catch C whose catch cylinder B accomplished the swivelling in and out of a catch arm 5 supported about a swivel axle 4. In the resting position depicted in FIG. 2a, the catch arm 5 is above the chain belt 1. With the piston of the catch cylinder B according to FIG. 2b extended out, the catch arm 5 is swivelled into a chain link. The catch arm 5 corresponding to FIG. 2c engages over a chain link axle 6 with a front fork-shaped end 7. Corresponding to FIG. 2d the catch arm 5 is supported to be swivellable about a further swivel axle 8 which is perpendicular to the direction of motion of belt 1 such that the catch arm 5 in the direction of motion of the chain link axle 6 is swivelled out of its direction of motion under excessive stress or against the action of a reset force into an arrested resting position. This is of advantage if a malfunction occurs in the motion of the lubricating apparatus 2 along the chain belt 2 and the chain belt 1 to be lubricated continues moving.

[0058] The embodiment of a lubricating apparatus 2, depicted in FIGS. 3a to 3d, with catch C differs from that depicted in FIGS. 2a to 2d substantially thereby that the lubricating apparatus 2 supporting the catch C is laterally immovable, however the chain belt 1 can be moved, with the aid of the catch arm 5 from a starting position depicted in FIG. 3a in which it is spaced apart from the lubricating head D, by the swivelling-in of the catch arm 5 into an end position depicted in FIG. 3b in which the lubrication site to be lubricated is guided to the outlet opening of the lubricating head D. For the correct lateral positioning of the chain belt 1 in the proximity of the lubrication site serves an edge 9 of the track 10, on which the chain belt 1 runs.

[0059] The lubrication device depicted graphically in FIG. 4, serves for lubricating traveling lubrication sites, for example on a roller and chain belt 11 with bearing rollers 13 to be lubricated and individual roller pairs 124, 124′ (FIG. 4) and double roller pairs 125 (FIG. 8 and 9) comprising roller or chain link bolts 14. The roller or chain belt 11 can be guided on a track 17 provided with edges 16. To the supply the lubrication device, lubricant is supplied from a central lubrication pump. The driving of the pump takes place via a pressure switch S1 with two switching points: P≦Pmin (pump on) and P≧PMax (pump off). At the beginning of the lubrication process a proximity switch S5 is switched in order to indicate the operational readiness of the lubrication device.

[0060] A proximity switch S4 acquires inductively the position of a traveling first lubrication site, for example a bearing roller 13, which is to be lubricated. A second proximity switch S4′ is provided for the acquisition of a second adjacent traveling bearing roller 13′ of a further individual roller pair 124′ or of a double [bearing] roller pair 125, which is to be lubricated in the same operating cycle. The distance between two lubrication sites—i.e., for example the spacing Z of the roller axes of two individual roller pairs 124, 124′ (FIG. 1) or of a double bearing roller pairs 125 (FIG. 8)—can basically be developed in any desired way. However, it is important that the spacing X of the two switches S4, S4′ agrees at least substantially with the spacing Z of the roller axes of the bearing rollers 13, 13′ (FIG. 4) between two individual roller pairs 124, 124′ (FIG. 4) or of a double bearing roller pairs. For example, initially proximity switch S4 switches a 5/2-way valve Y1. Thereby air pressure is output onto a catch cylinder B and a catch C extends out. Details of catch C can be found in the Utility Patent DE 200 15 780 U, whose disclosed content is fully incorporated into the present disclosure. The sequence of the lubrication process, i.e. whether for example each pair of bearing rollers 13, 13′ or every second pair of bearing rollers 13, 13′ or the like is to be lubricated, depends fundamentally on the number of bearing rollers and the speed of the chain or roller or chain [sic] belt or the roller spacing.

[0061] The extended catch C intercepts the chain 11 and therefore the latter moves the lubricating apparatus 12 parallel to the bearing roller 13, in order to carry out the lubrication process. The lubricating apparatus is for this purpose disposed on a carriage F, which is supported readily displaceably on a frame or a base plate G. In order for the carriage F not to move jointly with the bearing roller 13 by jerks but in control, a return cylinder A can be acted upon with a preset damping pressure via a pressure regulation valve H.

[0062] If, simultaneously or within a predetermined time interval, apart from the first proximity switch S4 also the second proximity switch S4′ responds, a double bearing roller pair is involved, if the proximity switch S4 alone responds, a single bearing roller pair is involved. During the motion process of carriage F, the proximity switch S5 departs a (not shown) switching element; therein the 5/2-way valves Y2, Y2′ switch. Thereby air pressure is [supplied] to the lubricating head cylinders E, E′, such that the two lubricating heads D, D′ are extended out to the lubrication sites, developed for example as lubricating nipples. By pressing the two lubricating heads D, D′ onto the particular roller nipple, a piston delivers the lubricant from a prefilled dosing chamber to the particular lubrication site.

[0063] When the proximity switch S6 reaches a second (not shown) switching element, the 5/2-way values Y2, Y2′ are again moved into the resting position. If the proximity switch S4 alone switches, only valve Y2 is driven. A reset spring of the lubricating head cylinder E, E′ moves the lubricating heads D, D′ back into the starting position. A central supply pump fills the dosing chamber with lubricant for the next delivery stroke.

[0064] After the switching of the proximity switch S6 a programmable time starts, after the passage of which the 3/2-way valve Y1 again switches into its starting position. The air pressure moves the catch C back into a starting position. With the aid of a fast venting valve, a fast resetting can be accomplished.

[0065] When the catch C has reached its starting position, a proximity switch S8 switches valve Y3. In this way, compressed air acts onto the double-action return cylinder A and the damping pressure, which was generated in the forward motion of lubricating apparatus 12, is switched off. The lubricating apparatus 12 moves back into its starting position. The return speed can be regulated via a choke valve I.

[0066] A provided position switch (roller-lever switch) S2 has safety functions: in the event of failure or too sluggish an evaluation of the proximity switch S7, the switching element actuates the position switch S2. In this case all valves are switched to be voltage-free and the lubricating apparatus 2 remains in its end position. In order to avoid damage through automatic return transport, the lubricating apparatus 2 must be manually brought out of the end position. After the malfunction has been resolved, the lubricating apparatus 2 subsequently moves automatically back into the starting position.

[0067] According to the invention, the carriage F, which carries the lubricating apparatus 2, is engaged by an acceleration cylinder (boost cylinder) J. It is controlled by means of a valve such that before or simultaneously with the extending-out of the catch C a boosting phase of the carriage F, and thus the lubricating apparatus 2, takes place. The sensor control is thus such that the belt 1 at speeds greater than a predetermined maximum speed, for example greater than 0.4 m/sec, meets the catch C within a predetermined boosting path. The carriage F is therein moved with a boosting speed, settable through the one-way restrictor valve, of, for example, 0.4 m/sec parallel to belt 1. From the outset the return cylinder A acts with approximately 0.5 bar against the carriage motion, in order to prevent the rebounding of catch C from belt 1. Approximately 10 mm after the end of the boosting path, the proximity switch S6 actuates the lubricating head D, whereby the lubricating process is initiated. Simultaneously the acceleration cylinder J becomes pressure-free. After the delivery phase of the lubricant to belt 1, the proximity switch S6 allows the lubricating head D to move back. Simultaneously, the prepressure or the contact pressure of 0.5 bar by means of an additional valve against the carriage motion is discharged. After a short delay time, the catch C also moves back, which in its end position actuates the proximity switch S8 and thus initiates the return of carriage F. During the return of carriage F, the pressure-free acceleration cylinder J is also moved into the end position. With a one-way restrictor valve I on return cylinder A the return speed can be set.

[0068] When carriage F is again in the starting position, sensor S5 is actuated, which reduces the full return pressure of approximately 6 bars by change-over switching via a pressure reducer by means of an additional valve to the contact pressure of 0.5 bar. Therewith, the lubrication device is again in the starting position.

[0069] In FIGS. 5 and 6 can be seen a lubricating device which comprises four lubricating heads D, D′; D″, D′″, and agreeing features are provided with agreeing reference numbers. The lubricating heads D to D′″ are each disposed pairwise opposing one another such that the belt 11 to be lubricated is disposed in each instance between two pairwise lubricating heads D, D″ and D′, D′″ belonging to one another for one pair of bearing rollers. The lubricating heads D to D′″are in a rear end position if the associated cylinders E, E′, E″, E′″ are not acted upon by pressure.

[0070] The carriage F equipped with lubricating heads D to D′″ is guided via bearings 18, 19 on guide struts 110, 111 parallel to track 17 linearly parallel to the belt axis. The spacing W of the lubricating heads D, D′ or D″, D′″, respectively, from one another is fixedly set for a specific lubricating device and depends on the distance to the lubrication site. Spacing W between two lubricating head pairs D, D″; D′, D′″ on carriage F is thus adapted in each instance to the spacing Z of two lubrication sites succeeding one another on belt 11. Spacing Z, on the other hand, agrees with spacing X between the two sensors S4, S4′.

[0071] Lubricating heads D to D′″ are preferably movable pairwise in the direction toward the lubrication sites of the belt toward and away from it such that the charging forces resulting from the lubrication pressure onto the belt 1 and the lubricating apparatus 2 cancel each other.

[0072] Catch C which is accommodated on carriage F with four lubricating heads D to D′″, in this case acts perpendicularly from above and its, for example, fork-shaped contour (cf. for example FIGS. 2c and 2d of DE 200 15 780 U) prevents that the carriage F is pushed off when intercepting the roller or chain link bolt 4.

[0073] A schematic switching plan for driving the lubricating heads D to D′″ shown in FIGS. 5 and 6 is depicted in FIG. 7. For the acceleration of carriage F an acceleration cylinder J (not shown there) is employed, for the driving of which an electrically actuatable 5/2-way valve (also not shown there) is provided. For driving the four cylinders E to E′″ serve two 5/2-way valves Y4, Y5. The supply lines and the disposal lines of lubricating heads D, D ″; D′, D′″, each opposing one another in pairs, are pairwise connected to an input or output of the associated 5/2-way valve Y4, Y5. With each cylinder E to E′″ in a pressure/venting line, further, in each instance one fast venting valve K is associated. After the junction of the pairwise associated pressure/venting lines of two opposing lubricating heads D, D″; D′, D′″ in the pressure/venting line a pressure regulator R is in each instance provided, which serves for setting the lubricating head contact pressure. For guiding the carriage F back serves the return cylinder A for the driving of which an electrically actuatable 3/2-way valve Y6 is provided. For the actuation of the catch cylinder B serves a further valve Y7.

[0074] In FIGS. 8 and 9 is evident a belt 11 to be lubricated in the manner of a so-called universal chain or transversely jointed chain. This comprises alternating guide links 112, 113 and bearing or load links 114, 115, which are built in each instance from pairwise identical guide link plates 116, 117 and bearing or load link plates 118, 119. For the articulated connection of the links, clamping sleeves or bolts 120, 121 are provided, which are each disposed pairwise and offset with respect to one another by 90° on the link end such that universal joint function results.

[0075] Each guide link 112, 113 comprises individual guidance rollers 122, 123 disposed spaced apart from one another. The bearing or load links 114, 115 are equipped with individual bearing roller pairs 124 or with double bearing roller pairs 125 and each supported rotatably with roller or chain link bolts 14 on the bearing or load links 114, 115. On the lateral front faces of roller or chain bolts 124 are disposed for example lubricating nipples to be lubricated. Individual bearing roller pairs 124 and double bearing roller pairs 125 can each be provided alternatingly as well as at the spacing of a division T.

[0076] With the double bearing roller pairs 125 the spacing Z of the roller axes agree substantially with a spacing X of the sensors S4, S4′. The alternating disposition of individual and double bearing roller pairs 124, 125 to be lubricated requires a flexibly adaptable lubrication device.

[0077] The control of the lubrication arrangement according to FIGS. 5 to 7 takes place, for example, as follows. Spacing X of sensors S4, S4′ is set to spacing Z of the roller axes of a double bearing roller pair 125 such that the detection of an individual or double bearing roller pairs 124, 126 is possible. Simultaneous signals of the two sensors S4, S4′ or such within a predetermined time interval (if the spacings Z and X do not precisely agree) correspond to a double bearing roller pair 125. If the signals of sensors S4, S4″ occur in a greater time interval, an individual bearing roller pair 124 is present. Accordingly, the activation of both lubricating head pairs D, D″; D′, D′″ or only the activation of the one lubricating head pair D, D″ takes place.

[0078] The lubrication of the guidance rollers 122, 123 of the universal chain 1 according to FIGS. 8 and 9 can take place, for example, with a lubrication device according to DE 200 15 780 U with corresponding alignment of the lubricating heads there.

[0079] The lubrication device depicted in FIG. 10 serves for lubricating traveling lubrication sites on roller and chain belts. To supply the lubrication device with lubricant central lubrication pumps are provided with pressure limitation valves. In the basic position the proximity switch S11 is switched. The proximity switch S6 acquires inductively the position of the tread roller and switches the 3/2-way valves Y1 and Y9. The air pressure acts onto the catch cylinder B, the catch C extends out; the air pressure acts on the connection [sic: boost] cylinder N, the carriage F is moved in the direction of motion of the chain. A boosting of carriage F serves for decreasing the force impulse upon the chain roller impacting onto the catch C. The sequence of the lubrication processes (every tread roller or for example every sixth tread roller etc.) depends on the number of tread rollers and on the speed of the chain or roller belt or from the roller spacing.

[0080] The tread roller to be lubricated intercepts the catch C and moves the lubricating apparatus precisely parallel to the tread roller in order to be able to carry out the lubrication process. The lubricating apparatus is connected with carriage F which is supported so as to be readily movable on frame G. During the motion process the switching element L intercepts the proximity switch S12 and switches the 3/2-way valve Y2. The air pressure now acts upon the lubricating head cylinder E. Lubricating head D moves toward the lubrication nipple. The proximity switch S12 lies at least 50 mm behind the end position of the boost cylinder piston. This ensures that upon reaching the proximity switch S12, the roller to be lubricated is in contact with catch C. In order for carriage F not to move by jerks, but rather in control along with the tread roller during the lubrication phase, cylinder A is acted upon via a pressure reducer valve O with a damping pressure. The damping pressure is set at the factory to approximately 0.5 bar.

[0081] By pressing the lubricating head D onto the roller nipple, a piston delivers the lubricant from a prefilled dosing chamber to the lubrication site.

[0082] When the switching element L reaches the proximity switch S3, the damping is terminated. The 3/2-way valve Y10 switches into the resting position. A reset spring of lubricating head cylinder E moves the lubricating head D into its starting position; in the course of this a central supply pump fills the dosing chamber with lubricant for the next delivery stroke. Simultaneously a delay time is programmed into the control; after passage of this time, valve Y1 switches into the resting position, a reset spring moves back the catch C.

[0083] When the catch C reaches its resting position, it switches via switch S4 the 3/2-way valve Y3. The system air pressure moves the lubricating apparatus with the cylinder A into the base position. The return speed is set with the one-way restrictor valve M1. Simultaneously valve Y10 switches. This ensures that carriage F is retained by the damping pressure in the base position if the valve Y3 is again switched voltage-free. When carriage F reaches its starting position, switching element L switches via switch S1 the valve Y3 into the resting position. The lubricating apparatus is in stand-by condition for the next lubrication pulse.

[0084] The position switch S5 has only safety functions: with failure or too sluggish an evaluation of proximity switch S3 the switching element L actuates the position switch S5. All valves are switched to be voltage-free. The lubricating apparatus remains standing in the end position. In order to avoid damage through automatic return transport, the lubricating apparatus must be moved manually out of the end position. By the resolving of the malfunction, the lubricating apparatus subsequently moves automatically back into the base position.

[0085] All air connections to the pneumatic cylinders are equipped with fast venting valves in order to ensure a satisfactory operating speed of the lubrication device.

LIST OF REFERENCE SYMBOLS

[0086] 1 Belt or the like

[0087] 2 Lubricating apparatus

[0088] 3 Rollers

[0089] 4 Swivel axle

[0090] 5 Catch arm

[0091] 6 Roller or chain link axle

[0092] 7 Fork-shaped end

[0093] 8 Swivel axle

[0094] 9 Edge

[0095] 10 Track

[0096] 11 Belt or the like

[0097] 12 Lubricating apparatus

[0098] 13 Bearing rollers

[0099] 14 Roller or chain link bolt

[0100] 15 Catch arm

[0101] 16 Edge

[0102] 17 Track

[0103] 18 , 19 Bearing

[0104] 110 , 111 Guide struts

[0105] 112 , 113 Guide links

[0106] 114 , 115 Bearing or load links

[0107] 116 , 117 Guide link plates

[0108] 118 , 119 Bearing or load link plates

[0109] 120 , 121 Clamping sleeves, bolts or the like

[0110] 122 , 123 Guidance rollers

[0111] 124 Individual bearing roller pair

[0112] 125 Double bearing roller pair

[0113] A Return cylinder

[0114] B Catch cylinder

[0115] C Catch

[0116] D Lubricating head

[0117] E Lubricating head cylinder

[0118] F Carriage

[0119] G Frame

[0120] H Pressure regulator

[0121] I Choke valve

[0122] J Acceleration cylinder

[0123] K Fast venting valve

[0124] L Switching element

[0125] M1 One-way restrictor valve

[0126] M2 One-way restrictor valve

[0127] N Boost cylinder

[0128] O Pressure reducer valve

[0129] R Pressure regulator

[0130] S1 Pressure switch

[0131] S2 Roller-lever switch

[0132] S3 to S12 Proximity switch

[0133] T Division

[0134] W Spacing of lubricating heads D, D′

[0135] X Spacing of sensors S4, S4′

[0136] Y1 to Y12 Valves

[0137] Z Spacing of roller axes or lubrication sites

Claims

1. Lubrication device for lubricating traveling lubrication sites, such as such on a belt (1), in particular on a roller or chain belt (1), which comprises a lubricating apparatus (2) supported so as to be movably back and forth in the longitudinal direction of the lubrication site motion, which [apparatus] comprises a catch (C) assuming relative to the belt (1) or the like device comprising the lubrication sites a resting position and a catching position, wherein the belt (1) or the like the catch (C) in the catching position and thus driving [along] the lubricating apparatus (2) over a predetermined run path at the speed of the belt (1) or the like, one which a lubricating head (D) through lateral relative motion between belt (1) or the like and lubricating apparatus (2) can be moved to a lubrication site and can supply lubricant to it, and wherein at the end of the run path the lubricating head (D) as well as also the catch (C) relative to the belt (1) or the like return back to the particular resting position and the lubricating apparatus (1) [sic: (2)] can be moved back along the belt (1) or the like into its starting position, characterized in that before or simultaneously with bringing the catch (C) into engagement with the belt (1) or the like, the lubricating apparatus (2) can be extended in the longitudinal direction of the lubrication site motion at a boosting speed, which is greater than zero and less than the speed of the belt (1) or the like.

2. Lubrication device as claimed in claim 1, characterized in that the boosting speed of the lubricating apparatus (2) is no less than a predetermined maximum difference, such as approximately 0.4 m/sec, than the speed of the belt (1) or the like.

3. Lubrication device as claimed in claim 1 or 2, characterized in that the boosting speed of the lubricating apparatus (2) is no more than a predetermined maximum value, such as approximately 0.4 m/sec.

4. Lubrication device as claimed in one of claims 1 to 3, characterized in that the boosting motion of the lubricating apparatus (2) takes place by means of an acceleration device, such as an acceleration cylinder (J) or a setting motor, possibly against the action of a reset device, such as a return cylinder (A).

5. Lubrication device as claimed in one of the preceding claims, characterized in that the boosting speed of the lubricating apparatus (2) is settable if appropriate by means of a one-way restrictor valve.

6. Lubrication device as claimed in claim 3 or 4, characterized in that the acceleration cylinder (J) becomes pressure-free as soon as the lubricating head (D) starts with the delivery of the lubricant.

7. Lubrication device as claimed in one of claims 3 to 5, characterized in that during the return of the lubricating apparatus (2) along the belt (1) or the like into the starting position the acceleration cylinder (J) can be moved pressure-free into its starting position.

8. Lubrication device as claimed in one of claims 3 to 6, characterized in that the return speed of the lubricating apparatus (2) is settable, if appropriate by means of a one-way restrictor valve (I) on the return cylinder (A).

9. Lubrication device as claimed in one of claims 3 to 7, characterized in that the counterpressure of the return cylinder (A) during the boosting motion of the lubricating apparatus (2) is approximately 0.5 bar and the return pressure of the return cylinder (A) during the return motion of the lubricating apparatus (2) along the belt (1) or the like is approximately 6 bar.

10. Lubrication device for lubricating traveling lubrication sites, such as those on a belt (1) or the like, in particular on a roller or chain belt (1), which comprises a lubricating apparatus (2) supported so as to be movable back and forth in the longitudinal direction of the lubrication site motion, which [apparatus] comprises a catch (C) assuming relative to the belt (1) or the like device comprising the lubrication sites a resting position and a catching position, wherein the belt (1) or the like the catch (C) in the catching position and thus driving [along] the lubricating apparatus (2) over a predetermined run path at the speed of the belt (1) or the like, one which a lubricating head (D) through lateral relative motion between belt (1) or the like and lubricating apparatus (2) can be moved to a lubrication site and can supply lubricant to it, and wherein at the end of the run path the lubricating head (D) as well as also the catch (C) relative to the belt (1) or the like return back to the particular resting position and the lubricating apparatus (1) [sic: (2)] can be moved back along the belt (1) or the like into its starting position, characterized in that the lubricating apparatus (2) comprising the lubricating head (D), together with the catch (C), preferably with its aid, can be moved laterally of the belt (1) or the like perpendicular to it, or/and that the belt (1) or the like, preferably with the aid of the catch (C), is movable transversely to the longitudinal direction of the lubrication site motion in the direction toward the lubricating head (D).

11. Lubrication device as claimed in one of claims 1 to 9, characterized in that the lubricating apparatus (2) comprising the lubricating head (D), together with the catch (C) can be moved laterally of the belt (1) or the like perpendicularly to it.

12. Lubrication device as claimed in one of claims 1 to 9, characterized in that the belt (1) or the like can be moved with the aid of the catch (C) transversely to the longitudinal direction of the lubrication site motion in the direction toward the lubricating head (D).

13. Lubrication device as claimed in one of the preceding claims, characterized in that the catch (C) comprises a catch arm (5) which, preferably from above or below, engages the belt (1), for example of the roller or chain belt (1) or the like.

14. Lubrication device as claimed in one of the preceding claims, characterized in that the catch arm (5) is shaped at its outer end in the form of a fork (7) for engaging over a roller or chain link axle (6).

15. Lubrication device as claimed in one of the preceding claims, characterized in that the catch arm (5) in the direction of motion of the roller or chain link axle (6) can be swivelled out of its path of motion.

16. Lubrication device for lubricating traveling lubrication sites, such as those on a belt (11) or the like device comprising lubrication sites, in particular on a roller or chain belt (11), which comprises a lubricating apparatus (12) supported displaceably back and forth in the longitudinal direction of the lubrication site motion, which [apparatus] has a catch (C) assuming relative to the belt (11) a resting position and a catching position, wherein the belt (11) or the like drives [along] the catch (C) in the catching position, and thus the lubricating apparatus (12) over a predetermined run path at the speed of the belt (11) or the like, on which at least one lubricating head (D) can be moved through relative motions between belt (11) or the like and lubricating apparatus (2) [sic: (12)] toward a lubrication site and to which lubricant can be supplied, and wherein at the end of the run path the at least one lubricating head (D) as well as also the catch (C) relative to the belt (11) or the like arrive back in the particular resting position and the lubricating apparatus (11) [sic: (12)] can be moved back along the belt (11) or the like into its starting position, characterized in that two sensors (S4, S4′) disposed spaced apart at spacing (X) in the longitudinal direction of the belt (11) or the like are provided, whose signals are drawn on for detection of two lubrication sites disposed spaced apart at spacing (Z) in the longitudinal direction of the belt or the like, and that for the supply of the two lubrication sites at least lubricating heads (D, D′) disposed at their spacing, are provided.

17. Lubrication device as claimed in claim 16, characterized in that the spacing (X) of the sensors (S4, S4′) agree substantially with the spacing (Z) of succeeding lubrication sites of the belt (11) or the like.

18. Lubrication device as claimed in claim 16 or 17, characterized in that the spacing (4) of the sensors (S4, S4′) from one another can be set.

19. Lubrication device for lubricating traveling lubrication sites, such as those on a belt (11) or the like device comprising the lubrication sites, in particular on a roller or chain belt (11), which comprises a lubricating apparatus (12) supported so as to be movable back and forth in the longitudinal direction of the lubrication site motion, which [apparatus] comprises a catch (C) assuming relative to the belt (11) or the like comprising the lubrication sites a resting position and a catching position, wherein the belt (11) or the like the catch (C) in the catching position and thus driving [along] the lubricating apparatus (12) over a predetermined run path at the speed of the belt (11) or the like, one which a lubricating head (D) through lateral relative motion between belt (1) [sic: (11)] or the like and lubricating apparatus (12) can be moved to a lubrication site and can supply lubricant to it, and wherein at the end of the run path the lubricating head (D) as well as also the catch (C) relative to the belt (11) or the like return back to the particular resting position and the lubricating apparatus (11) [sic: (12)] can be moved back along the belt (11) or the like into its starting position, characterized in that the lubricating apparatus (12) comprises at least two lubricating heads (D, D″) opposing one another relative to the belt (11) or the like, which [heads] can each from their side be moved in the direction toward the lubrication sites of the belt (11) synchronously toward and away from it.

20. Lubrication device as claimed in one or several of claims 16 to 18, characterized in that the lubricating apparatus (2) [sic] comprises at least two lubricating heads (D, D″) opposing one another relative to the belt (11) or the like, which each from their side can be moved in the direction toward the lubrication sites of belt (11) synchronously toward and away from it.

21. Lubrication device as claimed in one or several of claims 16 to 20, in particular for lubricating belts (11) or the like with double bearing roller pairs (125) and individual roller pairs (124), characterized in that two pairs of lubricating heads (D, D″; D′, D′″) are pairwise controllable.

22. Lubrication device as claimed in one or several of claims 16 to 21, characterized in that the lubricating heads (D to D′″) are disposed jointly on a carriage (F), which preferably also supports the catch (C).

23. Lubrication device as claimed in one or several of claims 16 to 22, characterized in that the lubricating heads (D, D ″; D′, D′″) are provided pairwise mirror-symmetrically to the belt (11).

24. Lubrication device as claimed in one or several of claims 16 to 23, in particular for lubricating belts (1) [sic] or the like, which comprise, in addition to bearing rollers (13) also guidance rollers (122, 123), whose rotational axes are disposed at an angle, preferably perpendicular, to the rotational axes of the bearing rollers (13), characterized in that the lubrication sites of the guidance rollers (22, 23) [sic] can be lubricated with a lubrication device according to DE 200 15 780 U.