Patent Application
20180339883
This application claims priority to Chinese Patent Application No. 201710367977.0, filed May 23, 2017, and all the benefits accruing therefrom under 35 U.S.C. ยง 119, the contents of which in its entirety are herein incorporated by reference.
The present invention relates to the field of elevators, and in particular, to a tractor assembly of an elevator.
At present, with the increase of the elevator workload and the lifting distance, developers also need to use increasingly larger tractors to operate elevators. However, for such a tractor, its manufacturing cost is not simply increased linearly as the workload increases. In fact, when a required workload increases, the corresponding manufacturing cost of the tractor will grow exponentially. In this case, if multiple tractors with a small workload are used to replace a tractor with a large workload, the cost can be reduced significantly while a similar work requirement is met. However, how to arrange multiple tractors in a mounting space becomes a problem to be urgently solved in practical application of such a technology.
An objective of the present invention is to provide a tractor assembly that can achieve a high workload at a low cost.
Another objective of the present invention is to provide an elevator that can achieve a high workload at a low cost.
To achieve the objective of the present invention, according to one aspect, a tractor assembly is provided, which includes: a rack; multiple tractors; and multiple traction parts connected to an elevator car and an elevator counterweight respectively via the tractors; wherein the multiple tractors are mounted on the rack respectively, and are staggered along a horizontal direction; the vertical direction extends along an elevator hoistway, and the horizontal direction transects the elevator hoistway to extend.
To achieve the another objective of the present invention, according to another aspect, an elevator is further provided, which includes: an elevator car, an elevator counterweight, and a tractor assembly; wherein the tractor assembly includes a rack, multiple tractors, and multiple traction parts; the traction parts are connected to the elevator car and the elevator counterweight respectively via the tractors; wherein the multiple tractors are mounted on the rack respectively, and are staggered along a horizontal direction; the vertical direction extends along an elevator hoistway, and the horizontal direction transects the elevator hoistway to extend.
Referring to
It should be known that, although the solution is described with two racks 110a and 110b, two tractors 120a and 120b and two sets of traction belts 150a and 150b in the forgoing embodiment, the numbers of the parts are not the only choice. In fact, many aspects such as the size of the arrangement space, the product cost and the mounting convenience should all be taken into comprehensive consideration, and the most appropriate number of tractors that should be equipped for an elevator product in an actual application can be obtained accordingly. Moreover, it is more appropriate to equip each tractor with a rack and a set of traction belts correspondingly. In the solution conceived in this embodiment, one optional solution is two tractors, and three or more tractors may also be selected.
Referring to
In fact, as further shown in
Definitely, specific spatial arrangement positions of two tractors in
Optionally, referring to
As another optional solution, it is possible to combine the above two arrangement manners, that is, stagger the two tractors 120a and 120b in the horizontal direction and the vertical direction at the same time, to further prevent occurrence of interference. This example is also shown in
Herein, it should be known that, the vertical direction and the horizontal direction described above should normally use the hoistway as a reference standard. That is, the arrangement along the vertical direction indicates staggering the multiple traction parts in an extending direction of the length of the hoistway, such that a part of the tractors is arranged higher than the other part. The arrangement along the horizontal direction indicates staggering the multiple traction parts in a direction of transecting the hoistway to extend, such that rotation axes of a part of the tractors and rotation axes of the other part of the tractors are staggered on the horizontal plane.
The structural and connection relationships between the parts therein are specifically described in the following.
The racks 110a and 110b each include a mounting frame. The mounting frame is constructed substantially as a rectangle and is formed by surrounding four borders. A set of fixed traction pulleys 130a and 130b is disposed on inner sides of two opposite long borders of the first mounting frame, and a set of fixed traction pulleys 130c and 130d is disposed on inner sides of two opposite long borders of the second mounting frame. With such arrangement, the tractors 120a and 120b each correspond to a mounting frame and a set of fixed traction pulleys 130a, 130b, 130c and 130d respectively, thus forming two sets of traction drive systems that can move independently and have a rope ratio of 1:1. The elevator car and the elevator counterweight can be drawn by operating either or both of the two sets of traction drive systems. A set of fixed traction pulleys and a tractor can draw a limited number of traction belts, for example, the number is generally 4-5 at most. In this case, two sets of fixed traction pulleys and two tractors can draw up to 8-10 traction belts. This can effectively avoid sinking and oscillation problems occurring when the elevator is in an operating state or a stop state, thus improving the reliability and comfort of taking the elevator.
In this case, the borders of the multiple mounting frames should be provided with connecting portions matched with each other, such that they can be connected into a whole.
Definitely, it is also possible to construct the whole rack into a mounting frame and dispose multiple fixed traction pulleys 130a, 130b, 130c and 130d in the mounting frame. The traction belts 150a and 150b are connected to the elevator car 200 and the elevator counterweight 300 respectively via the tractors 120a and 120b and the fixed traction pulleys 130a, 130b, 130c and 130d. In this case, the traction on the elevator car and the elevator counterweight can also be achieved.
Moreover, a rope ratio of the tractor assembly 100 is 1:1, thus reducing the quantity of the traction belts significantly. For example, when the traction belts are steel belts or steel wire ropes, the quantity of the steel belts or steel wire ropes can be reduced greatly.
In addition, the solution of movable traction pulleys whose rope ratio is 2:1 can also be used. Although not shown in the figures, movable traction pulleys can be disposed on the elevator car 200 and the elevator counterweight 300 respectively, thus achieving the traction on the elevator car and the elevator counterweight.
Optionally, to enhance the installation firmness of the tractors and the racks, mounting base plates 140a and 140b may be further disposed on the racks 110a and 110b, for providing the tractors 120a and 120b with mounting positions.
Optionally, to ensure that the output torque of multiple tractors can be superimposed and coordinated well and that the delay start or the following problems can be avoided, on/off of the multiple tractors should be able to be controlled in a linked manner.
According to another aspect of the conception, an embodiment of an elevator is further provided. Referring to
Optionally, as an embodiment of several arrangement spaces, the racks 110a and 110b can be mounted in the elevator hoistway or an elevator machine room. On the one hand, owing to the reduction of the product size, when the tractor assembly is arranged in the elevator machine room, the space dimension of the machine room can be reduced, so that the design of a small machine room can be achieved. On the other hand, when the tractor assembly is directly arranged above the elevator hoistway, even the machine room can be directly saved, so that the machine room-free design can be achieved.
In addition, the tractor assembly has good applicability, which can be applied to a number of mounting forms such as the elevator counterweight 300 is a lateral elevator counterweight and/or a rear elevator counterweight.
An operating process of an elevator according to an embodiment of the conception will be described below with reference to
The above examples mainly describe the tractor assembly and the elevator of the present invention. Although only some implementation manners of the present invention are described, those of ordinary skill in the art should understand that the present invention can be implemented in many other forms without departing from the purport and scope thereof. Therefore, the examples and implementation manners are regarded as exemplary instead of being limitative, the present invention can cover a variety of modifications and replacements without departing from the spirit and scope of the present invention as defined by the appended claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201710367977.0 | May 2017 | CN | national |
