The present invention generally relates to a tool for attaching and removing a retaining ring associated with an industrial tire rim.
Solid tires are used in various applications, including industrial applications such as lift trucks and similar vehicles. Solid tires are mounted on rims by pressing the tire onto the rim. Many of the solid tire rims have integral flanges on one side and removable rings that attach to the rim on the opposite side to retain the tire between the rings and the flange. Consequently, when mounting the solid tire, the rim is placed in a press with the flange located away from the forcing ram of the press. The tire is then fitted over the opposite side of the rim, and the press pushes the tire onto the rim by applying force to a “cage”. The cage includes a pair of flat rings spaced vertically by circumferentially-spaced supports extending between the two rings. One ring is contacted by the press, and the opposite ring engages the circumference of the solid tire. The available space inside the cage allows the operator to attach or remove the lock ring after the solid tire has been pressed, and held, onto the rim. Since the cage restricts the area within which the user can operate when attaching and removing the lock ring, and since these relatively small rings are extremely inelastic and difficult to handle, it is believed to be desirable to provide a tool that will assist in this operation.
Therefore, it is an object of the present invention to provide a tool that will help users manipulate the retaining ring for a solid tire.
In light of this object, the present invention generally provides a tire ring tool used in connection with a lock ring and a retaining ring to secure a tire on a rim, the ring tool including a handle and an install end supported on the handle. The install end includes an arm extending radially outward from the handle, a body portion extending from the arm and terminating in a tip adapted for insertion between the rim and the lock ring, where the body portion defines a notch that extends axially outward relative to the tip.
The present invention further provides a tire ring tool used in connection with a retaining ring and a lock ring for securing a solid tire on a rim, the ring tool including a handle and a separating end extending radially outward from the handle. The separating end includes a body portion having an outer radial edge that terminates in a tip at its axial and radial outer extremity, where the body portion defines a notch adjacent to the tip that opens axially outward.
The present invention further provides a tire ring tool used in connection with a retaining ring and a lock ring for securing a solid tire on a rim, the ring tool including a handle and a lifting end extending generally radially outward from the handle. The lifting end has a body portion that curves axially inward as it extends radially outward and terminates in a tip and a projection extending radially outward from the tip, where the projection has a lesser lateral dimension than the tip, and the tip extends laterally outward of the projection to form a shoulder.
The present invention further provides a tire ring tool used in connection with a retaining ring and a lock ring for securing a solid tire on a rim, the ring tool including a handle and a removal end extending generally axially outward from the handle. The removal end includes a body portion having a first portion extending axially outward and radially outward from the handle and a second portion extending axially outward and radially inward from the first portion, where the joint formed by the connection of the first and second portions extends radially outward of the handle, and the second portion terminates in a tip adapted to be inserted between the lock ring and the retaining ring.
The present invention further provides a tire ring tool used in connection with a retaining ring and a lock ring for securing a solid tire on a rim, the ring tool including a handle, an install end supported on one end of the handle and a removal end supported on the other end of the handle. The install end includes an arm extending radially outward from the handle and a body portion extending radially outward from the arm. The body portion terminates in a tip and defines a notch radially inward of the tip, where the notch opens axially inward. The removal end includes a body portion having a first portion extending axially outward and radially outward from the handle and a second portion extending axially outward and radially inward from the first portion forming a joint therebetween. The joint extends radially outward of the handle, and the second portion terminates in a tip adapted for insertion between the lock ring and the retaining ring.
The present invention further provides a tire ring tool used in connection with a retaining ring and a lock ring for securing a solid tire to a rim, the ring tool including a handle, a separating end supported on one end of the handle, and a lifting end supported on the opposite end of the handle. The separating end includes a body portion extending radially outward from the handle, a tip extending from the body portion at an axial and radial extremity thereof, where the body portion defines a notch radially inward of the tip that opens axially outward. The lifting end includes a body portion extending radially outward from the handle terminating in a tip, where the body portion curves axially inward as it extends radially outward. The lifting end further includes a projection extending radially outward from the tip, where the tip is wider than the projection forming a shoulder adjacent to the projection.
The present invention further provides a tire ring tool kit including a handle, an install end, a removal end, a lifting end, and a separating end supportable on the handle. The install end includes an arm extending radially outward from the handle, a body portion extending radially outward from the arm, where the body portion terminates in a tip and defines a notch radially inward of the tip that opens axially inward. The removal end includes a body portion having a first portion extending axially outward and radially outward from the handle and a second portion extending axially outward and radially inward from the first portion forming a joint therebetween. The joint extends radially outward of the handle, and the second portion terminates in a tip adapted for insertion between the lock ring and the retaining ring. The separating end includes a body portion extending radially outward from the handle, a tip extending from the body portion at an axial and radial extremity thereof, where the body portion defines a notch radially inward of the tip that opens axially outward. The lifting end includes a body portion extending radially outward from the handle terminating in a tip, where the body portion curves axially inward as it extends radially outward, and a projection extending radially outward from the tip, where the tip is wider than the projection forming a shoulder adjacent to the projection.
A solid tire T is shown in
To overcome the deficiencies of using a screwdriver, a ring tool has been provided for manipulating lock ring 4. While ring tool 10 will be described in connection with a solid tire, it will be appreciated that ring tool 10 may be used in connection with any rim that uses a lock ring to secure the tire on the rim, including pneumatic tires. In general, lock rings are used in industrial tire applications, but this should not be considered limiting and is mentioned only as an example of one application in which the ring tool 10 may be used. In general, a ring tool 10 according to the concepts of the present invention includes at least one working end for manipulating lock ring 4 and a handle 12 that can be grasped outside of the cage 5 by the user.
A first working end referred to as an “install end,” generally indicated by the number 15, extends radially outward from handle 12. Install end 15 may include an arm 16 that extends radially from the handle 12 a selected length. It will be appreciated that the length of the arm 16 may be adjusted according to the confines of the cage 5 and the leverage needed to mount lock ring 4. Install end includes a body portion 18 and a tip 19. The tip 19 may be flattened to facilitate its insertion between lock ring 4 and the retaining flange 8. Also, as best shown in
Body portion 18 defines a notch 20 adapted to receive lock ring 4. Since lock ring 4 has a smaller diameter than retaining flange 8 against which tip 19 bears, body portion 18 may initially extend axially outward at a first portion 21 so that notch 20 is located sufficiently inward of retaining flange 8 to capture lock ring 4. To locate the tip 19 outward of retaining flange 8, body portion 18 may extend axially inward at a second portion 22. As shown, the extension of second portion 22 may be sufficient to place tip 19 axially inward of arm 16. To help tip 19 capture the edge of retaining flange 8, the tip 19 may extend radially outward relative to second portion 22 of body portion 18, forming a shallow recess 24 for capturing the retaining flange 8 between the body portion 18 and tip 19. As will be discussed more completely below, as tool 10 is rotated downward to pull lock ring 4 over retaining flange 8, tip 19 works inwardly around the edge of retaining flange 8 into the groove 9, such that lock ring 4 is guided around the edge and into the groove 9 as well. To facilitate release of lock ring 4 from the tip 19, the lower surface 26 of tip 19 may be rounded away from the lower surface 27 of second portion 22. To reduce the frictional forces between second portion 22 and lock ring 4, facilitating its release, lower surface 27 of second portion 22 may include a protrusion 29 that reduces the contact area between the second portion 22 and lock ring 4. As shown, protrusion 29 may be formed near the center of second portion 22. Protrusion 29 may have any shape or configuration suitable for providing less surface area than the entire second portion 22 to contact lock ring 4, including, for example, the raised line-type protrusion shown. It will be appreciated that protrusion 29 may be formed integrally as part of the portion 22 or separately by attaching material to lower surface 27.
With reference to
To change tires, it is necessary to remove lock ring 4 and retaining ring 3 before pressing tire T off of the rim 1 with a hydraulic press. Often as a result of painting or oxidation, lock ring 4 and retaining ring 3 stick together. Since lock ring 4 rests in a recess around the top inner circumference of retaining ring 3, the two must be separated in order to remove lock ring 4, i.e., retaining ring 3, alone, must be forced down and away from lock ring 4. To that end, a ring tool 10 having an end that separates lock ring 4 and retaining ring 3 may be provided. A third working end for separating the rings referred to as a “separating end” is shown in
To facilitate the separation of lock ring 4 and retaining ring 3, a notch 38 may be formed in the body portion 31 of separating end 30 adjacent to the tip 32 on the axial outward wall 39 of the separating end 30. As best shown in
With lock ring 4 and retaining ring 3 separated from each other, the demounting of tire T continues with removal of lock ring 4. To that end, one end of the split lock ring 4 is typically stretched radially outward and then lifted over retaining flange 8 of the rim 1. As discussed above, this process is typically performed with a screwdriver, creating great difficulty for the user. To that end, a ring tool 10 having a fourth working end for lifting lock ring 4 over retaining flange 8 may be provided. One example of a “lift end” is shown in
As best shown in
To lift the end of lock ring 4, handle 12 is rotated upward, forcing the projection 45 downward and outward to cause the end of lock ring 4 to clear retaining flange 8 and lift lock ring 4 above retaining flange 8. After handle 12 is rotated upward, it may be moved sideways to cause a shoulder 47 to act as a fulcrum against flange 8, to raise lock ring 4 high enough to stay put. Since the axial interior surface 44 curves axially outward relative to tip 43, as lock ring 4 is lifted, the spring force within lock ring 4 that urges the end inward so that lock ring 4 would assume its original diameter causes lock ring 4 to move radially inward along a working end, preventing lock ring 4 from slipping off of lift end 40.
To completely remove lock ring 4, a solid ring tool 10 may be provided with a second working end, generally indicated by the number 50 in
Another common problem when using a screwdriver is that the screwdriver is inserted too far, causing it to bear against the underside of retaining flange 8 and preventing it from lifting lock ring 4. To that end, a stop projection 57 may extend outward from second segment 52 axially inward of tip 55 to create a projecting surface 58 that engages the edge of lock ring 4 to prevent over-insertion of the tip 55. Stop projection 57 is spaced inwardly of the tip 55 a distance equal to or less than the width of lock ring 4.
As shown in
It will be appreciated that the ends 15, 30, 40, and 50 may be formed on separate tools 10 or combined on one or more tools. Also, the ends 15, 30, 40, and 50 may be formed as separate components attachable to handle 12 or, as shown, formed as a single piece. In the example shown, combined tools are formed with a pair of ends extending from each side of the handle 12. While the ends may be combined in any manner, in the configuration shown, first end 15 is shown paired with second end 50 in
In light of the foregoing, it should thus be evident that a solid tire lock ring tool constructed as described herein substantially improves the art and otherwise accomplishes the objects of the present invention.