Wheel and machining piece for machining rotation stopping groove

Abstract

The wheel comprises a wheel body and a wheel shaft, a wheel shaft hole is formed in the wheel body, a shaft sleeve is arranged in the wheel shaft hole in a sleeved mode, and the wheel shaft is rotatably arranged in the shaft sleeve in a sleeved mode. And the rotation stopping part which can be embedded into the rotation stopping groove is formed on the peripheral surface of the shaft sleeve to increase the matching of the shaft sleeve and the rotation stopping groove, so that the shaft sleeve can be effectively prevented from rotating relative to the wheel shaft hole.

Description

Technical Field

[0001] The utility model relates to an application field, in particular to a track wheel, a guide wheel or a supporting wheel for crawler traveling equipment such as an excavator, a crawler crane, a rotary drilling rig, etc. Background Art

[0002] Track rollers are key components of the "four wheels and one belt" of crawler-type engineering machinery chassis. The current market competition is fierce, and everyone is advocating cost reduction and efficiency improvement, and placing higher demands on product quality and service life. However, people are paying more attention to practices such as cutting processes and saving materials. It seems that buying accessories saves money, but in fact, they need to be replaced again not long after they are replaced, which is costly and labor-intensive. The main reason why track rollers are not used for a long time in the current market is that they rotate with the shaft (simply: follow the rotation); the sleeve is pressed into the hole with interference, and the interference is generally no more than 20 threads. The track roller is a load-bearing part, like the shaft is a rolling pin, and the sleeve is the dough. The sleeve is rolled longer and longer under pressure, and the interference is getting smaller and smaller until it rotates with the shaft. Once the sleeve follows the rotation, the service life will drop sharply.

[0003] The main method to solve the problem of hesitant rotation on the market now is to add a pin to the flange surface of the copper sleeve. This method requires drilling a hole on the surface, which is effective but has low production efficiency. The flange will crack and desolder after a period of use. For example, the Chinese patent document with publication number CN104071243A discloses a track roller, including a track roller body, a support shaft arranged inside the track roller body, and kara arranged at both ends of the support shaft. The support shaft inside the kara is interference-fitted with a floating seal ring and a floating seal rubber ring for sealing. A lubricating oil channel is provided inside the support shaft, and an oil plug is provided at the end of the lubricating oil channel. There are two iron sleeve parts interference-fitted inside the track roller body between the floating seal rings, and a first sealing ring is provided at the fitting place between the outer side of the iron sleeve part and the track roller body. It is characterized in that: an axis step is provided on the support shaft between the iron sleeve parts, and there is a The cam is connected to the wheel hub by a toothed connection, and the toothed connection is fixed with the guide rail, and the toothed connection is fixed with the guide rail, and the toothed connection is fixed with the guide rail.

[0004] The above solution adopts the method of providing a stop pin on the flange edge of the copper sleeve to prevent the copper sleeve from rotating relative to the supporting wheel body during use. However, during long-term use, the copper sleeve will deform or crack, causing the stop pin to separate from the copper sleeve, which will cause the stop pin to lose its stopping effect, and the problem of the copper sleeve rotating with the support shaft still exists. Utility Model Content

[0005] The utility model aims to provide a wheel which can prevent a shaft sleeve from rotating relative to a wheel body and has a better anti-rotation effect.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A wheel comprises a wheel body and an axle, wherein the wheel body is formed with an axle hole, a shaft sleeve is provided in the wheel axle hole, and the wheel axle is rotatably sleeved in the shaft sleeve. The wheel axle is characterized in that a rotation-stop groove extending along its axial direction is provided on the inner wall of the wheel axle hole, and a rotation-stop portion which can be embedded in the rotation-stop groove is formed on the outer peripheral surface of the shaft sleeve.

[0008] By adopting the above technical solution, a stop portion that can be embedded in the stop groove is formed on the outer circumferential surface of the sleeve. During long-term use, the sleeve and the stop groove on the inner wall of the wheel axle hole can be continuously ground into each other to increase the fit between the sleeve and the stop groove, which can more effectively prevent the sleeve from rotating relative to the wheel axle hole.

[0009] The hardness of the shaft sleeve is less than the hardness of the inner wall of the wheel shaft hole. The shaft sleeve interference sleeve is arranged in the wheel shaft hole, so that the shaft sleeve forms a rotation-stopping portion embedded in the anti-slip groove due to interference extrusion.

[0010] By adopting the above technical solution, since the hardness of the sleeve is less than the hardness of the inner wall of the wheel axle hole, during long-term use, the anti-rotation portion formed on the outer peripheral surface of the sleeve will fill the anti-skid groove, making the sleeve and the anti-skid groove fit more tightly to prevent the sleeve from rotating relative to the wheel axle hole.

[0011] The inner wall of the wheel axle hole is formed with a plurality of anti-rotation grooves arranged at circumferential intervals.

[0012] By adopting the above technical solution, multiple circumferentially arranged anti-rotation grooves can form multiple corresponding anti-rotation parts when the adapter sleeve is installed, which can further prevent the adapter sleeve from rotating relative to the wheel axle hole.

[0013] The cross section of the anti-rotation groove can be rectangular, triangular or arcuate.

[0014] By adopting the above technical solution, when the rectangular anti-rotation groove is matched with the anti-rotation part, since the sides of the rectangle are straight lines, the anti-rotation part can achieve surface contact with each side of the anti-rotation groove. Compared with some curved shapes that may only have line contact or local point contact, surface contact can provide greater friction and a tighter fit. In this way, the anti-rotation part is less likely to loosen or slide in the anti-rotation groove, and can better achieve the function of preventing relative rotation. At the same time, triangular or curved surfaces can also be used, and the choice can be made according to different actual needs.

[0015] The shaft sleeve is a copper sleeve or a bimetallic sleeve.

[0016] By adopting the above technical solution, the shaft sleeve is made of copper or bimetallic. After adding lubricating oil, an oil film is formed on the copper surface, which has excellent wear resistance. During the operation of the supporting wheel, the wheel shaft will continuously rotate relative to the connecting sleeve. Without good lubrication, the friction between the two will be large, which will easily cause wear and shorten the service life.

[0017] The wheels are supporting wheels, guide wheels or supporting wheels for crawler tracks.

[0018] By adopting the above technical solution, it can be applied to various wheels, thereby increasing the scope of its use.

[0019] Two shaft sleeves are provided at both ends of the wheel axle hole.

[0020] By adopting the above technical solution, two shaft sleeves are provided at both ends of the wheel axle hole, which can enhance the structural stability. The shaft sleeves at both ends work together to better support the wheel axle, so that it maintains a stable axial position during rotation.

[0021] The processing part includes a cylinder and a cutter head protruding from the outer peripheral surface of the cylinder. The outer diameter of the cylinder is adapted to the inner diameter of the wheel axle hole. During processing, pressure is applied to make the processing part pass through the wheel axle hole. During this process, the cutter head cuts or squeezes the inner wall of the wheel axle hole to process the anti-rotation groove.

[0022] By adopting the above technical solution, when processing the anti-rotation groove, it is only necessary to pass the workpiece through the wheel axle hole by applying pressure, and then the cutter head can cut or extrude the inner wall of the wheel axle hole to process the anti-rotation groove. This simplifies the processing process and greatly reduces the processing cost.

[0023] The cutter head is in the shape of a long strip with a cross section adapted to the anti-rotation groove.

[0024] By adopting the above technical solution, the cutter head is in the shape of a long strip with a cross section that matches the anti-rotation groove, which can facilitate the processing of the anti-rotation groove and make the processing more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1This is a stereoscopic view of the utility model as a track wheel with one end cover and the wheel axle removed.

[0026] Figure 2 This is a stereoscopic view from another perspective when the utility model is a track wheel with one end cover and the wheel axle removed.

[0027] Figure 3 This is an exploded view of the wheel body and the shaft sleeve when the utility model is a supporting wheel.

[0028] Figure 4 This is a top view of the utility model when it is a track wheel, with one end cover and the wheel axle removed.

[0029] Figure 5 for Figure 4 Cross-sectional view along the AA direction.

[0030] Figure 6 This is a cross-sectional view of the utility model when it is a track wheel, with one end cover and the wheel axle removed and the shaft sleeve not installed.

[0031] Figure 7 This is an assembly sectional view of the utility model when it is a supporting wheel.

[0032] Figure 8 for Figure 7 Enlarged view of part A.

[0033] Figure 9 This is a front view of the utility model when it is a supporting wheel.

[0034] Figure 10 for Figure 9 Cross-sectional view along the BB direction.

[0035] Figure 11 for Figure 9 Enlarged view of part B.

[0036] Figure 12 This is a schematic diagram of machining the anti-rotation groove.

[0037] Figure 13 This is a cross-sectional view of the machining of the stop groove.

[0038] Figure 14 This is a left view of the utility model when it is a guide wheel.

[0039] Figure 15 for Figure 15 Cross-sectional view in CC direction.

[0040] Figure 16 for Figure 16 Enlarged view of part C in . DETAILED DESCRIPTION

[0041] The technical solution of the present invention will be further described below through specific embodiments and in conjunction with the accompanying drawings:

[0042] Reference Figures 1 to 16 A wheel is shown, which can be a supporting wheel, a guide wheel or a supporting wheel.

[0043] When the wheel is a supporting wheel, refer to Figures 1 to 13 As shown, the track roller includes a wheel body 1 and an axle 2. A wheel axle hole 11 adapted to the axle 2 is formed on the wheel body 1. Two end covers 12 are respectively provided at both ends of the wheel body 1.

[0044] The axle 2 can pass through the axle hole 11, and a mounting groove 13 is formed on the end surface of the wheel body 1. One end of the end cover 12 is fixedly set in the mounting groove 13, and a fixing pin 121 is set on the other end. The fixing pin 121 can pass through the end cover 12 and the axle 2 at the same time. Fixing the axle 2 by the end cover 12 is an existing technology and will not be elaborated here.

[0045] The inner wall of the axle hole 11 is provided with a stop groove 111 with a rectangular, triangular or arc-shaped cross section extending along its axial direction. The appropriate shape can be selected according to the specific situation. In this embodiment, the stop groove 111 with a rectangular cross section is taken as an example. The stop groove 111 is arranged in four circles on the inner wall of the shaft hole 11. The end of the axle hole 11 is provided with a sleeve 14, which is a copper sleeve or a bimetallic sleeve. In this embodiment, the copper sleeve is taken as an example. The hardness of the sleeve 14 is less than the hardness of the inner wall of the axle hole 11. The sleeve 14 includes an axially extending sleeve body 141 and a flange edge 142 extending outward along the top edge of the sleeve body 141. The sleeve 14 can be interference fit with the axle hole 11. The outer peripheral surface of the sleeve 14 is smooth before installation (such as Figure 3 As shown), during installation, the sleeve body 141 of the sleeve 14 can be pressed into the wheel axle hole 11 by a hydraulic press, and during the pressing process, since the hardness of the sleeve 14 is less than the hardness of the inner wall of the wheel axle hole 11, the outer peripheral surface of the annular outer wall 141 will be deformed to a certain extent when being pressed into the wheel axle hole 11, so as to form a stop portion 143 that cooperates with the stop groove 111. After a period of use, the stop portion 143 will completely fill the stop groove 111 (as shown in FIG. Figure 8 、 Figure 10 and Figure 11As shown), to prevent the shaft sleeve 14 from rotating during use, the wheel body 1 is formed with an annular limiting surface 112 surrounding the wheel axle hole 11, and the flange edge 141 is in contact with the annular limiting surface 112. The annular limiting surface 112 is provided with a locating pin 113, and the flange edge 141 is formed with a locating hole 144 for inserting the locating pin 113. After installation, the locating pin 113 cooperates with the flange edge 141 to further prevent the shaft sleeve 14 from rotating. Considering the processing cost issue, the above scheme can also achieve the purpose of preventing the shaft sleeve 14 from rotating by solely cooperating with the anti-rotation portion 143 and the anti-rotation groove 111.

[0046] Reference Figures 12 to 13 The processing method of a supporting wheel anti-rotation groove 111 shown also includes a processing part 3, and a cutting head 31 is formed on the outer peripheral surface of the processing part 3. The hardness of the processing part 3 is greater than the hardness of the inner wall of the wheel axle hole 11, and the processing part 3 can be adapted to the wheel axle hole 11. The processing part 3 can be driven through the wheel axle hole 11 by a hydraulic press to cut or extrude the anti-rotation groove 111 on the inner wall of the wheel axle hole 11.

[0047] During installation, it is only necessary to press the sleeve 14 into the wheel axle hole 11 through a hydraulic press. During use, the rotation of the wheel axle 2 will cause the outer peripheral surface of the sleeve 14 to continuously squeeze the inner wall of the wheel axle hole 11, so that the anti-rotation portion 143 can completely fill the anti-rotation groove 111, thereby achieving the purpose of preventing the sleeve 14 from rotating relative to the wheel axle hole 11.

[0048] When the wheel is a guide wheel, refer to Figures 14 to 16 As shown, the guide wheel includes a wheel body 5 and an axle 6. A wheel axle hole 51 is formed on the wheel body 5. A copper sleeve 7 is sleeved in the wheel axle hole 51. The wheel axle 6 can be rotatably sleeved in the sleeve 7. A stop groove 511 extending along its axial direction is provided on the inner wall of the wheel axle hole 51. A stop portion 71 which can be embedded in the stop groove 511 is formed on the outer peripheral surface of the sleeve 7. The processing method of the stop groove 511 and the specific coordination with the stop portion 71 are the same as those of the supporting wheel, and will not be elaborated here.

[0049] The above description is merely a preferred embodiment of the present invention and therefore cannot be used to limit the scope of implementation of the present invention. In other words, equivalent changes and modifications made according to the scope of the patent application and the contents of the specification of the present invention should still fall within the scope of the present patent.

Claims

1. A wheel comprising a wheel body and an axle, wherein the wheel body is formed with an axle hole, a shaft sleeve is sleeved in the axle hole, and the wheel axle is rotatably sleeved in the shaft sleeve, characterized in that: A rotation-stop groove extending along the axial direction is provided on the inner wall of the wheel axle hole, and a rotation-stop portion which can be embedded in the rotation-stop groove is formed on the outer peripheral surface of the shaft sleeve.

2. A wheel according to claim 1, characterized in that: The hardness of the shaft sleeve is less than the hardness of the inner wall of the wheel shaft hole. The shaft sleeve interference sleeve is arranged in the wheel shaft hole, so that the shaft sleeve forms a rotation-stopping portion embedded in the anti-slip groove due to interference extrusion.

3. A wheel according to claim 1, characterized in that: The inner wall of the wheel axle hole is formed with a plurality of anti-rotation grooves arranged at circumferential intervals.

4. A wheel according to claim 1, characterized in that: The cross section of the anti-rotation groove can be rectangular, triangular or arcuate.

5. A wheel according to any one of claims 1 to 4, characterized in that: The shaft sleeve is a copper sleeve or a bimetallic sleeve.

6. A wheel according to any one of claims 1 to 4, characterized in that: The wheels are supporting wheels, guide wheels or supporting wheels for crawler tracks.

7. A wheel according to any one of claims 1 to 4, characterized in that: Two shaft sleeves are provided at both ends of the wheel axle hole.

8. A workpiece for machining a rotation-stop groove, comprising a wheel according to any one of claims 1 to 7, characterized in that: The processing part includes a cylinder and a cutter head protruding from the outer peripheral surface of the cylinder. The outer diameter of the cylinder is adapted to the inner diameter of the wheel axle hole. During processing, pressure is applied to make the processing part pass through the wheel axle hole. During this process, the cutter head cuts or squeezes the inner wall of the wheel axle hole to process the anti-rotation groove.

9. A workpiece for machining a rotation-stop groove according to claim 8, characterized in that: The cutter head is in the shape of a long strip with a cross section adapted to the anti-rotation groove.

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