Press fitting idle wheel support tool
Through the guide rod and thrust plate structure of the tooling of the idler bracket, the uneven gap and preload force of the parts caused by bolt tightening is solved, and the stable assembly of the gearbox assembly is achieved, which improves the connection stability of the parts and the uniformity of the overall structure.
Patent Information
- Application Number
- CN202422512431.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-17
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-10-17
AI Technical Summary
During the assembly of the gearbox assembly, bolt tightening causes too large installation gaps between the parts and uneven distribution of preload forces, resulting in the inability to guarantee the stability of the parts, and there is a large gap between the idler bracket and the housing engaging surface, affecting the assembly stability.
The press-mounted idler support tooling is adopted. Through the combined structure of the guide rod, thrust pressing plate and spring, the pressing force is evenly distributed, ensuring that the pre-tightening force of the conical bearing reaches the design value, avoiding warping and deformation of the idler support, and releasing the pressing force after the bolt is tightened, ensuring that the tightening force is evenly distributed.
It improves the stability of gearbox assembly assembly, reduces the negative impact of component tolerance matching, and ensures stable connections of components and uniformity of overall structure.
Smart Images
Figure CN223172890U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of assembly lines, in particular to a tooling for press-fitting an idler wheel bracket. Background Art
[0002] During the assembly of a transmission assembly, due to tolerance fit during the bolt tightening process, the installation gap between components is too large, resulting in uneven pre-tightening force distribution and the problem that the stability of components cannot be guaranteed. Currently, in the production line assembly process, the direct bolt tightening method is adopted, and there is no relevant pressing tooling, which will lead to situations such as component skew during assembly on the production line. After the product enters the market, it may also cause troubles to customers. To reduce the risks brought by these factors, there is an urgent need for a high-precision assembly tooling on the production line that can achieve flexible press-fitting of relevant components to improve the stability of the whole box structure.
[0003] Currently, when assembling the idler wheel bracket assembly on an automated production line, the direct bolt tightening method is adopted. When installing the tapered bearing, axial pre-tightening is required. The interference amount of the gasket results in a large gap between the joint surface of the idler wheel bracket and the housing. At the same time, the distribution radii of the connecting bolts of the idler wheel bracket are different, resulting in a deviation between the actual pre-tightening force and the design. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a tooling for press-fitting an idler wheel bracket, which solves the problems that when assembling the idler wheel bracket assembly on an automated production line, the direct bolt tightening method is adopted, axial pre-tightening is required for the installation of the tapered bearing, the interference amount of the gasket results in a large gap between the joint surface of the idler wheel bracket and the housing, and at the same time, the distribution radii of the connecting bolts of the idler wheel bracket are different, resulting in a deviation between the actual pre-tightening force and the design.
[0005] The embodiment of the present application provides a tooling for press-fitting an idler wheel bracket, which includes a limiting plate and a thrust pressing plate on one side of the limiting plate. Four groups of guide rods are respectively installed in the inner walls of the limiting plate and the thrust pressing plate. A pressing rod is installed inside the limiting plate located inside the four groups of guide rods. A sleeve rod is installed at the upper end of the pressing rod. A spring is sleeved on the outer wall of the sleeve rod. The lower end of the spring tube is fixedly installed with the upper end of the pressing rod, and the upper end of the spring is fixedly connected with the lower end of the thrust pressing plate.
[0006] By adopting the above technical solution, the lower end head of the guide rod is placed in the bolt hole of the idler bracket, and the thrust pressure plate moves axially along the guide rod to transmit the pressing force to the spring. The spring produces elastic deformation to transmit the pressing force to the pressure rod and the sleeve rod. The pressure rod transmits the pressing force to the support surface of the idler bracket. When the pressing force reaches the required value for pre-tightening of the tapered bearing, the bolt connection surface is in good contact. Then the limit plate and the guide rod are lifted to release the space required for tightening the bolts. After the bolts are tightened, the pressing force on the thrust pressure plate is released. The subassembly is completed on the basis of ensuring that the tightening force is evenly distributed and the idler bracket is not affected by warping deformation. The negative impact of interference or clearance caused by tolerance matching of parts on the bolt connection during assembly is reduced, and the stability of the assembly is improved.
[0007] Optionally, the upper end of the thrust plate is fixedly connected to a center disk.
[0008] By adopting the above technical solution, the center disk can be fixed by the thrust pressure plate.
[0009] Optionally, four groups of second circular holes are respectively opened on the outer walls of the thrust plate and the limiting plate, the guide rods are respectively located inside the second circular holes, and the diameter of the guide rod cross section is adapted to the diameter of the second circular holes.
[0010] By adopting the above technical solution, the guide rod can be slidably installed through the opening of the second circular hole.
[0011] Optionally, a first circular hole is opened on the outer wall of the limiting plate located inside the four groups of second circular holes, and four groups of third circular holes are opened on the outer wall of the thrust pressure plate, and the positions of the first circular hole and the third circular hole correspond to each other, the diameter of the first circular hole is larger than the diameter of the third circular hole, and the diameter of the first circular hole is adapted to the diameter of the pressure rod cross section.
[0012] By adopting the above technical solution, the pressure rod can be conveniently installed through the third circular hole.
[0013] Optionally, the first circular hole, the second circular hole and the third circular hole are evenly distributed around the periphery of the central disk.
[0014] By adopting the above technical solution, the first circular hole, the second circular hole and the third circular hole can be evenly radiated around the periphery through the arrangement of the central disk.
[0015] Optionally, a connecting rod is passed through the inner wall of the thrust plate located inside the third circular hole, the connecting rod is fixedly connected to the sleeve rod, and a threaded rod is fixedly connected to the side of the connecting rod away from the sleeve rod.
[0016] By adopting the above technical solution, the threaded rod and the sleeve rod can be fixed by the connecting rod, thereby facilitating the pushing of the sleeve rod and the connecting rod in the pressure push plate.
[0017] Optionally, a locking nut is threadedly installed on the outer wall of the threaded rod.
[0018] By adopting the above technical solution, the locking nut installed on the outer wall of the threaded rod can play a role in installing the pressure rod and the thrust pressing plate.
[0019] Optionally, the upper ends of multiple groups of the guide rods are respectively fixedly connected with limit blocks.
[0020] By adopting the above technical solution, the limit blocks can play a role in limiting the guide rods.
[0021] Compared with the prior art, the beneficial effects of the technical solution of the present application are as follows:
[0022] In the technical solution of the present application, the lower end head of the guide rod is placed into the bolt hole of the idler wheel bracket, the thrust pressing plate moves axially along the guide rod to transmit the pressing force to the spring, the spring generates elastic deformation to transmit the pressing force to the pressure rod and the sleeve rod, the pressure rod transmits the pressing force to the support surface of the idler wheel bracket. When the pressing force reaches the value required for pre-tightening the tapered bearing, the bolt connection surface is in good contact. Then, the limit plate and the guide rod are lifted to release the space required for tightening the bolt. After the bolt is tightened, the pressing force on the thrust pressing plate is released. On the basis of ensuring uniform distribution of the tightening force and no warping deformation of the idler wheel bracket, the sub-assembly is assembled, reducing the negative impact on the bolt connection caused by the interference or clearance generated by the tolerance fit of the parts during the assembly of the assembly, and improving the stability of the assembly. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] By reading the following detailed description of the non-limiting embodiments with reference to the accompanying drawings, other features, objectives and advantages of the present utility model will become more obvious:
[0024] Figure 1 It is a front view schematic diagram of the assembly of the idler wheel bracket pressing tool of the present utility model;
[0025] Figure 2 It is a left view schematic diagram of the idler wheel bracket pressing tool of the present utility model;
[0026] Figure 3 It is the Figure 2 enlarged view at A of the idler wheel bracket pressing tool of the present utility model;
[0027] Figure 4 It is an exploded view of the idler wheel bracket pressing tool of the present utility model.
[0028] In the figure: 1. Limit plate; 2. Pressing rod; 3. Sleeve rod; 4. Connecting rod; 5. Threaded rod; 6. Spring; 7. Thrust pressing plate; 8. First round hole; 9. Second round hole; 10. Third round hole; 11. Guide rod; 12. Limit block; 13. Locking nut; 14. Central disc. Specific implementation mode
[0029] Please refer to Figures 1-4 , the present utility model provides a technical solution: a tooling for pressing an idler wheel bracket, including a limit plate 1 and a thrust pressing plate 7 on one side of the limit plate 1. Four groups of guide rods 11 are respectively installed in the inner walls of the limit plate 1 and the thrust pressing plate 7. A pressing rod 2 is installed inside the limit plate 1 on the inner side of the four groups of guide rods 11. A sleeve rod 3 is installed at the upper end of the pressing rod 2. A spring 6 is sleeved on the outer wall of the sleeve rod 3. The lower end of the spring 6 tube is fixedly installed with the upper end of the pressing rod 2, and the upper end of the spring 6 is fixedly connected with the lower end of the thrust pressing plate 7;
[0030] Four groups of second round holes 9 are respectively opened on the outer walls of the thrust pressing plate 7 and the limit plate 1. The guide rods 11 are respectively located inside the second round holes 9, and the diameter of the cross section of the guide rod 11 is adapted to the diameter of the second round hole 9. A first round hole 8 is opened on the outer wall of the limit plate 1 located inside the four groups of second round holes 9. Four groups of third round holes 10 are opened on the outer wall of the thrust pressing plate 7, and the positions of the first round hole 8 and the third round hole 10 correspond to each other. The diameter of the first round hole 8 is larger than the diameter of the third round hole 10, and the diameter of the first round hole 8 is adapted to the diameter of the cross section of the pressing rod 2.
[0031] In the technical solution of the present utility model, by putting the lower end head of the guide rod 11 into the bolt hole of the idler wheel bracket, the thrust pressing plate 7 moves axially along the guide rod 11 to transfer the pressing force to the spring 6. The spring 6 generates elastic deformation to transfer the pressing force to the pressing rod 2 and the sleeve rod 3. The pressing rod 2 transfers the pressing force to the supporting surface of the idler wheel bracket. When the pressing force reaches the value required for preloading the tapered bearing, the bolt connection surface is in good contact. Then, the limit plate 1 and the guide rod 11 are lifted to release the space required for tightening the bolt. After the bolt is tightened, the pressing force on the thrust pressing plate 7 is released. On the basis of ensuring uniform distribution of the tightening force and no warping deformation of the idler wheel bracket, the sub-assembly is assembled, reducing the negative impact on the bolt connection caused by the interference or clearance generated by the tolerance fit of the components during the assembly of the assembly, and improving the stability of the assembly.
[0032] In addition, the opening of the second round hole 9 can play a role in slidingly installing the guide rod 11, and the third round hole 10 can facilitate the installation of the pressing rod 2.
[0033] In the technical solution of the present utility model, as Figure 2 and Figure 4As shown, a central disk 14 is fixedly connected to the upper end of the thrust pressure plate 7. The thrust pressure plate 7 can fix the central disk 14. The first round hole 8, the second round hole 9, and the third round hole 10 are evenly distributed around the central disk 14. The arrangement of the central disk 14 facilitates the even radiation of the first round hole 8, the second round hole 9, and the third round hole 10 on the periphery.
[0034] In the technical solution of the present utility model, as Figure 4 shown, a connecting rod 4 is inserted through the inner wall of the thrust pressure plate 7 located inside the third round hole 10. The connecting rod 4 is fixedly connected to the sleeve rod 3. One side of the connecting rod 4 away from the sleeve rod 3 is fixedly connected to a threaded rod 5. The connecting rod 4 can fix the threaded rod 5 and the sleeve rod 3, thereby facilitating the pushing of the sleeve rod 3 and the connecting rod 4 in the pressure push plate. A locking nut 13 is threadedly installed on the outer wall of the threaded rod 5. Installing the locking nut 13 on the outer wall of the threaded rod 5 can install the pressure rod 2 and the thrust pressure plate 7.
[0035] In the technical solution of the present utility model, as Figure 2 shown, limit blocks 12 are respectively fixedly connected to the upper ends of multiple guide rods 11. The limit blocks 12 can limit the guide rods 11.
[0036] During use, first, the lower end head of the guide rod 11 can be placed into the bolt hole of the idler bracket. The thrust pressure plate 7 moves axially along the guide rod 11 to transfer the pressing force to the spring 6. The spring 6 undergoes elastic deformation to transfer the pressing force to the pressure rod 2, the sleeve rod 3, the connecting rod 4, and the threaded rod 5. The pressure rod 2 transfers the pressing force to the support surface of the idler bracket. When the pressing force reaches the value required for the preloading of the tapered bearing, the bolt connection surface is in good contact. Then, the limit plate 1 and the guide rod 11 are lifted to release the space required for tightening the bolt. After the bolt is tightened, the pressing force on the thrust pressure plate 7 is released. On the basis of ensuring the even distribution of the tightening force and no warping deformation of the idler bracket, the sub-assembly is assembled, reducing the negative impact on the bolt connection caused by the interference or clearance generated by the tolerance fit of the components during the assembly of the assembly, and improving the stability of the assembly.
Claims
1. Press-fitting idler bracket tooling, characterized in that: It includes a limit plate (1) and a thrust pressure plate (7) on one side of the limit plate (1). Four groups of guide rods (11) are respectively installed in the inner walls of the limit plate (1) and the thrust pressure plate (7). A pressure rod (2) is installed inside the limit plate (1) on the inner side of the four groups of guide rods (11). A sleeve rod (3) is installed at the upper end of the pressure rod (2). A spring (6) is sleeved on the outer wall of the sleeve rod (3). The lower end of the spring (6) tube is fixedly installed with the upper end of the pressure rod (2), and the upper end of the spring (6) is fixedly connected to the lower end of the thrust pressure plate (7).
2. The press-fitting idler bracket tooling according to claim 1, wherein A central disc (14) is fixedly connected to the upper end of the thrust pressure plate (7).
3. The press-fitting idler bracket tooling according to claim 2, wherein Four groups of second round holes (9) are respectively formed in the outer walls of the thrust pressure plate (7) and the limit plate (1). The guide rods (11) are respectively located inside the second round holes (9), and the diameter of the cross-section of the guide rod (11) is adapted to the diameter of the second round hole (9).
4. The press-fitting idler bracket tooling according to claim 1, characterized in that, A first round hole (8) is formed in the outer wall of the limit plate (1) inside the four groups of second round holes (9). Four groups of third round holes (10) are formed in the outer wall of the thrust pressure plate (7), and the positions of the first round hole (8) and the third round hole (10) correspond to each other. The diameter of the first round hole (8) is larger than the diameter of the third round hole (10), and the diameter of the first round hole (8) is adapted to the diameter of the cross-section of the pressure rod (2).
5. The press-fitting idler wheel bracket tooling according to claim 4, characterized in that, The first round hole (8), the second round hole (9) and the third round hole (10) are evenly distributed around the central disc (14).
6. The press-fitting idler bracket tooling according to claim 5, wherein, A connecting rod (4) passes through the inner wall of the thrust pressure plate (7) inside the third round hole (10). The connecting rod (4) is fixedly connected to the sleeve rod (3), and a threaded rod (5) is fixedly connected to the side of the connecting rod (4) away from the sleeve rod (3).
7. The press-fitting idler wheel bracket tooling according to claim 6, wherein A locking nut (13) is threadedly installed on the outer wall of the threaded rod (5).
8. The press-fitting idler wheel bracket tooling according to claim 1, wherein Limit blocks (12) are respectively fixedly connected to the upper ends of the multiple groups of guide rods (11).