Bushing replacing device for chain

Abstract

The utility model discloses a bushing replacing device for a chain, which comprises a fixed block, a fixed block, a fixed block and a bushing replacing device, the fixed block is provided with a mounting groove for mounting a chain link, and the bottom surface of the mounting groove is provided with two through holes capable of allowing the bushing to pass through; the movable block is located above the fixed block and can ascend and descend in the height direction; two ejector rods are arranged on the movable block, the outer diameters of the two ejector rods are smaller than or equal to the inner diameter of the roller, and the outer diameters of the ejector rods are larger than the inner diameter of the lining. According to the utility model, the mounting groove is formed in the fixed block so as to position the chain link, and the movable block drives the ejector rod to move up and down so as to restrain the movement direction of the ejector rod, so that the chain link and the ejector rod are prevented from shifting when the bushing is replaced, the ejector rod is always aligned with the bushing without repeated alignment, the operation difficulty is reduced, and the bushing replacement efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of chains, in particular to a bushing replacement device for chains. Background Art

[0002] Chains are common transmission and traction devices, widely used in bicycles, motorcycles, conveyors, lifting equipment, and other fields. Chains are typically composed of multiple links, each of which is made up of several components, including rollers, bushings, and pins. Bushings, located between the rollers and pins, prevent direct contact between the pins and rollers, providing a buffer and reducing friction.

[0003] As the chain is used for a longer time, the bushing will be damaged and needs to be replaced. When replacing, you first need to remove the pin from the bushing, then press the damaged bushing out of the roller, and finally install the new bushing and reinstall the pin.

[0004] However, the existing bushing and roller have an interference fit, making it difficult to replace manually. The existing replacement method involves holding a push rod against the bushing and then tapping the push rod to eject the bushing. During installation, the bushing is also tapped into the roller by tapping the push rod.

[0005] The above bushing replacement method has the following problems: the chain link and the push rod are not positioned or constrained, there is displacement during the knocking process of the push rod, and the push rod and the bushing are difficult to align. Before each knocking, it is usually necessary to move the push rod again and align the bushing, which is cumbersome and inefficient. Summary of the Invention

[0006] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to propose a bushing replacement device for a chain, which is used to solve the problems in the prior art of difficulty in aligning the push rod with the bushing during bushing replacement, resulting in cumbersome operation and low efficiency.

[0007] The technical solution adopted by the present invention to solve the technical problem is a bushing replacement device for a chain, wherein the chain includes a plurality of rotatably connected chain links, each of which includes two rollers, each of which is provided with a bushing, and the bushing replacement device includes:

[0008] A fixing block, wherein the fixing block is provided with a mounting groove for mounting the chain link, and the bottom surface of the mounting groove is provided with two through holes allowing the bushing to pass through;

[0009] A movable block is located above the fixed block and can be raised and lowered in the height direction; two push rods are provided on the movable block, the outer diameters of the two push rods are smaller than or equal to the inner diameter of the roller, and the outer diameters of the push rods are larger than the inner diameter of the bushing.

[0010] Furthermore, the side wall of the installation groove may abut against the side wall of the chain link.

[0011] Furthermore, the fixing block is hollow to form a receiving space, and the through hole is communicated with the receiving space.

[0012] Furthermore, a plurality of notches are provided on the side surface of the fixing block, and the notches are communicated with the receiving space.

[0013] Furthermore, it also includes two guide pillars, which are respectively located on both sides of the fixed block, and the length directions of the guide pillars are arranged along the height direction; the movable block is slidably arranged on the guide pillars.

[0014] Furthermore, a sliding hole is respectively provided on both sides of the movable block, and the guide post can be slidably inserted into the sliding hole.

[0015] Furthermore, a press is included, the press including a fixed platform and a driving slider, the driving slider can be raised and lowered in a height direction relative to the fixed platform;

[0016] The fixed block is mounted on the fixed platform, and the movable block is detachably connected to the driving slider.

[0017] Furthermore, the push rod is detachably connected to the movable block.

[0018] Furthermore, a bushing replacement device for a chain is disclosed. The chain includes a plurality of rotatably connected chain links, each of which includes two rollers, each of which is provided with a bushing. The bushing replacement device includes:

[0019] Two stacked fixing blocks, each having a mounting slot for mounting the chain link;

[0020] A movable block is located above the fixed block and can be raised and lowered in a height direction; the movable block moves downward to press the bushing into the roller.

[0021] Furthermore, a press is included, the press including a fixed platform and a driving slider, the driving slider can be raised and lowered in a height direction relative to the fixed platform;

[0022] The fixed block is mounted on the fixed platform, and the movable block is detachably connected to the driving slider.

[0023] Compared with the prior art, the present invention has at least the following beneficial effects:

[0024] The fixed block features mounting slots to position the chain links, preventing them from shifting when replacing the bushing. The movable block also drives the ejector rod up and down, constraining its direction of movement and preventing it from shifting during bushing replacement. This ensures the ejector rod is always aligned with the bushing, eliminating the need for multiple alignments. This reduces operational complexity and improves bushing replacement efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural diagram of the bushing replacement device in Example 1;

[0026] Figure 2 This is a schematic structural diagram of the fixed block in Example 1;

[0027] In the picture:

[0028] 100, fixing block; 110, mounting slot; 120, through hole; 130, storage space; 140, notch;

[0029] 200, movable block; 210, ejector rod;

[0030] 300, chain link;

[0031] 400, press; 410, driving slide; 420, fixed platform; 430, guide column. DETAILED DESCRIPTION

[0032] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0033] Example 1

[0034] Please refer to Figure 1-Figure 2 The utility model discloses a bushing replacement device for a chain, wherein the chain includes a plurality of rotatably connected chain links 300, each of which includes two rollers, each of which is provided with a bushing. The bushing replacement device includes:

[0035] A fixing block 100 is provided with a mounting groove 110 for mounting the chain link 300 , and a bottom surface of the mounting groove 110 is provided with two through holes 120 for allowing the bushing to pass through;

[0036] The movable block 200 is located above the fixed block 100 and can be raised and lowered in the height direction; the movable block 200 is provided with two push rods 210, the outer diameter of the two push rods 210 is less than or equal to the inner diameter of the roller, and the outer diameter of the push rods 210 is greater than the inner diameter of the bushing.

[0037] Specifically, the chain link 300 is placed in the mounting groove 110, and the push rod 210 moves downward under the drive of the movable block 200 until the end of the push rod 210 contacts the bushing. The push rod 210 continues to move downward to press the bushing out of the roller. The present application provides a mounting groove 110 on the fixed block 100 to achieve positioning of the chain link 300, thereby preventing the chain link 300 from shifting when the bushing is replaced. At the same time, the movable block 200 drives the push rod 210 to move up and down to constrain the movement direction of the push rod 210, preventing displacement when the bushing is replaced. The push rod 210 is always aligned with the bushing, eliminating the need for multiple alignments, reducing the difficulty of operation, and improving the efficiency of bushing replacement.

[0038] It should also be mentioned that a through hole 120 is provided at the fixing block 100. When the bushing is supported by the push rod 210 and disengaged downward, the bushing can gradually extend into the through hole 120 to avoid the separation space of the bushing.

[0039] It should be noted that since the outer diameter of the push rod 210 is less than or equal to the inner diameter of the roller, the push rod 210 can be extended into the roller. At the same time, the outer diameter of the push rod 210 is greater than the inner diameter of the bushing, so that the push rod 210 can resist the bushing after extending into the inner side of the roller and gradually press the bushing out of the roller.

[0040] Furthermore, the sidewall of the mounting groove 110 may abut against the sidewall of the chain link 300 .

[0041] Specifically, the chain link 300 is positioned by abutting against the chain link 300 at multiple side walls of the mounting groove 110 to prevent the chain link 300 from shifting when the bushing is replaced.

[0042] Furthermore, the fixing block 100 is hollow to form a receiving space 130 , and the through hole 120 is communicated with the receiving space 130 .

[0043] Furthermore, a plurality of notches 140 are formed on the side surface of the fixing block 100 , and the notches 140 are communicated with the receiving space 130 .

[0044] Specifically, a receiving space 130 communicating with the through hole 120 is formed in the middle of the fixing block 100. After the bushing is detached from the roller, it falls from the through hole 120 into the receiving space 130. Then the operator can reach in through the notch 140 and take out the bushing.

[0045] Furthermore, two guide pillars 430 are included. The two guide pillars 430 are respectively located on both sides of the fixed block 100 , and the length direction of the guide pillars 430 is arranged along the height direction; the movable block 200 is slidably set on the guide pillars 430 .

[0046] Furthermore, a sliding hole is respectively provided on both sides of the movable block 200 , and the guide pillar 430 is slidably disposed in the sliding hole.

[0047] Specifically, the guide column 430 and the sliding hole are provided to constrain the sliding direction of the movable block 200 and prevent the ejector rod 210 from tilting left or right when ejecting the bushing.

[0048] Furthermore, a press machine 400 is included, wherein the press machine 400 includes a fixed platform 420 and a driving slider 410, and the driving slider 410 can be raised and lowered relative to the fixed platform 420 in a height direction;

[0049] The fixed block 100 is mounted on the fixed platform 420 , and the movable block 200 is detachably connected to the driving slider 410 .

[0050] Specifically, the fixed block 100 is mounted on the fixed platform 420 of the press 400, and the movable block 200 is mounted on the driving slider 410. The driving slider 410 drives the movable block 200 to move up and down to press the bushing out of the roller.

[0051] Furthermore, the push rod 210 is detachably connected to the movable block 200 .

[0052] Specifically, the push rod 210 is detachably connected to the movable block 200. When the push rod 210 is no longer needed, the push rod 210 can be removed and a new bushing can be pressed into the roller by the lower surface of the movable block 200. Of course, the unused push rod 210 can be replaced to accommodate chains of different sizes.

[0053] Example 2

[0054] This embodiment discloses a bushing replacement device for a chain, wherein the chain includes a plurality of rotatably connected chain links 300, each of which includes two rollers, each of which includes a bushing. The bushing replacement device includes:

[0055] Two stacked fixing blocks 100 , each having a mounting slot 110 for mounting the chain link 300 ;

[0056] The movable block 200 is located above the fixed block 100 and can be raised and lowered in the height direction; the movable block 200 moves downward to press the bushing into the roller.

[0057] Specifically, in this embodiment, the movable block 200 is not connected to the push rod 210 , the chain link 300 is placed in the installation groove 110 , the bushing is held and aligned with the roller, and then the movable block 200 moves downward to press the bushing in.

[0058] Furthermore, a press machine 400 is included, wherein the press machine 400 includes a fixed platform 420 and a driving slider 410, and the driving slider 410 can be raised and lowered relative to the fixed platform 420 in a height direction;

[0059] The fixed block 100 is mounted on the fixed platform 420 , and the movable block 200 is detachably connected to the driving slider 410 .

[0060] It should be noted that, compared to the first embodiment, this embodiment removes the push rod 210 and places the movable block 200 in direct contact with the bushing. To ensure that the stroke of the driving slide 410 in the press 400 remains unchanged, the height of the chain link 300 needs to be raised. Therefore, this embodiment employs two fixed blocks 100 stacked together in the height direction, with the chain link 300 placed in the mounting slot 110 of the upper fixed block 100 to achieve the elevation of the chain link 300.

[0061] In summary, the bushing replacement device in Example 1 of the present application realizes the removal of the bushing, and the bushing replacement device in Example 2 realizes the installation of the bushing. Both can realize the removal of the old bushing and the installation of the new bushing, that is, realize the replacement of the bushing.

[0062] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0063] In addition, terms such as "first," "second," and "an" in this utility model are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two or three, unless otherwise specifically defined.

[0064] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0065] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

Claims

1. A bushing replacement device for a chain, wherein the chain comprises a plurality of rotatably connected links, each of the links comprises two rollers, and each of the rollers is provided with a bushing, characterized in that: The bushing replacement device comprises: A fixing block, wherein the fixing block is provided with a mounting groove for mounting the chain link, and the bottom surface of the mounting groove is provided with two through holes allowing the bushing to pass through; A movable block is located above the fixed block and can be raised and lowered in the height direction; two push rods are provided on the movable block, the outer diameters of the two push rods are smaller than or equal to the inner diameter of the roller, and the outer diameters of the push rods are larger than the inner diameter of the bushing.

2. A bushing replacement device for a chain according to claim 1, characterized in that: The side wall of the installation groove can abut against the side wall of the chain link.

3. A bushing replacement device for a chain according to claim 1, characterized in that: The fixing block is hollow to form a receiving space, and the through hole is communicated with the receiving space.

4. A bushing replacement device for a chain according to claim 3, characterized in that: A plurality of notches are formed on the side surface of the fixing block, and the notches are communicated with the receiving space.

5. A bushing replacement device for a chain according to claim 1, characterized in that: The utility model further comprises two guide pillars, which are respectively located on both sides of the fixed block, and the length directions of the guide pillars are arranged along the height direction; the movable block is slidably arranged on the guide pillars.

6. A bushing replacement device for a chain according to claim 5, characterized in that: A sliding hole is respectively provided on both sides of the movable block, and the guide post is slidably arranged in the sliding hole.

7. A bushing replacement device for a chain according to claim 1, characterized in that: The press also includes a press including a fixed platform and a driving slider, wherein the driving slider can be raised and lowered in a height direction relative to the fixed platform; The fixed block is mounted on the fixed platform, and the movable block is detachably connected to the driving slider.

8. A bushing replacement device for a chain according to claim 1, characterized in that: The push rod is detachably connected to the movable block.

9. A bushing replacement device for a chain, wherein the chain comprises a plurality of rotatably connected links, each of the links comprises two rollers, and each of the rollers is provided with a bushing, characterized in that: The bushing replacement device comprises: Two stacked fixing blocks, each having a mounting slot for mounting the chain link; A movable block is located above the fixed block and can be raised and lowered in a height direction; the movable block moves downward to press the bushing into the roller.

10. A bushing replacement device for a chain according to claim 9, characterized in that: The press also includes a press including a fixed platform and a driving slider, wherein the driving slider can be raised and lowered in a height direction relative to the fixed platform; The fixed block is mounted on the fixed platform, and the movable block is detachably connected to the driving slider.

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