A bearing assembly fixture that can be reused in multiple processes
By designing bearing assembly fixtures that can be reused in multiple processes, and combining hydraulic equipment and flip-pressing methods, the problem of frequent tooling replacement required by traditional fixtures has been solved. This has resulted in a reduction in the number of fixtures, an improvement in assembly accuracy, and a more flexible production line, adapting to the bearing assembly needs of different shoulder lengths.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEFEI HAGONG AOTING INTELLIGENT TECH CO LTD
- Filing Date
- 2025-07-02
- Publication Date
- 2026-06-30
AI Technical Summary
In the traditional bearing assembly process, each assembly step requires the independent design of dedicated tooling, resulting in a large number of tooling, frequent replacements, high costs, and complex management, making it difficult to achieve flexible upgrades to the production line.
Design a bearing assembly fixture that can be reused for multiple processes. The fixture uses a first fixture and a second fixture, combined with hydraulic equipment, to achieve efficient reuse of multiple processes through flipping and pressing, avoiding multiple tooling changes and ensuring accurate bearing positioning.
It reduces the number of tooling and management costs, improves assembly accuracy and efficiency, ensures precise bearing positioning, adapts to tensioner shafts with different shoulder lengths, is suitable for mass production, and extends equipment service life.
Smart Images
Figure CN224425479U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bearing assembly technology, and in particular to a bearing assembly fixture that can be reused for multiple processes. Background Technology
[0002] Currently, in the manufacturing process of transmission components for commercial cleaning robots, pulleys and bearings need to be assembled onto a tensioning shaft, as shown in the attached diagram. Figure 6 As shown, in actual production, the bearing assembly process faces significant technical bottlenecks and management challenges. This is mainly reflected in the traditional assembly process's reliance on a "one-tool-per-process" model, where each assembly step requires independently designed dedicated tooling. This not only results in a large number of tooling but also necessitates frequent tooling changes when switching processes, severely slowing down the assembly cycle. Furthermore, the number of tooling components is directly proportional to manufacturing costs, with costs surging in multi-process scenarios. Simultaneously, the complexity of tooling warehousing, maintenance, and traceability management increases exponentially, hindering the flexible upgrading of the production line.
[0003] The industry urgently needs a multi-functional, integrated, and space-adaptable bearing assembly fixture to reduce the number of fixtures, improve assembly accuracy, and optimize management efficiency, providing technical support for the large-scale production of precision equipment such as cleaning robots. Utility Model Content
[0004] This utility model provides a bearing assembly fixture that can be reused in multiple processes, which solves the technical problem that currently each assembly process requires a dedicated fixture, resulting in frequent tooling switching during the assembly process, affecting tooling efficiency, and increasing manufacturing costs due to the large number of fixtures.
[0005] To solve the above-mentioned technical problems, this utility model provides a multi-process reusable bearing assembly fixture for sequentially mounting a first bearing, a transmission pulley, a bearing washer, and a second bearing onto the fixed end of a tensioner shaft. The fixture includes a first fixture and a second fixture. The first fixture is cylindrical, with a coarse end groove at one end. The opening of the coarse end groove is chamfered, and a first outer ring top ring is formed on the end face with the coarse end groove. The other end of the first fixture has a fine end groove and a V-groove, and an inner ring top ring and a second outer ring top ring are formed on the end face with the fine end groove. The second fixture is cylindrical, with a workpiece receiving groove on its upper end face, and a pulley top ring is formed on the end face with the workpiece receiving groove.
[0006] Preferably, the diameter of the coarse end groove is larger than the diameter of the tension wheel shaft, the fine end groove is clearance-fitted with the tension wheel shaft, and the diameter of the workpiece receiving groove is larger than the diameter of the tension wheel shaft.
[0007] Preferably, both the first and second bearings are deep groove ball bearings of the same type.
[0008] Preferably, the diameter of the inner ring top ring matches the inner ring diameter of the deep groove ball bearing, and the diameters of both the first and second outer ring top rings match the outer ring diameter of the deep groove ball bearing.
[0009] Preferably, the tensioner shaft is interference-fitted with the inner ring of the deep groove ball bearing, the outer diameter of the tensioner shaft matches the inner diameter of the bearing washer ring, and the transmission pulley is interference-fitted with the outer ring of the deep groove ball bearing.
[0010] Preferably, the diameter of the pulley top ring matches the diameter of the drive pulley.
[0011] Preferably, the surface of the tensioner shaft is provided with a shoulder; the inner wall of the transmission pulley is provided with a positioning flange.
[0012] Preferably, the height of the bearing washer ring is the same as the height of the positioning flange.
[0013] Preferably, the depths of both the coarse end groove and the workpiece receiving groove are not less than the axial distance from the fixed end of the shaft shoulder to the non-positioning end of the shaft.
[0014] Compared with related technologies, the bearing assembly fixture for multiple processes provided by this utility model has the following beneficial effects:
[0015] This utility model provides a bearing assembly fixture that can be reused in multiple processes. The fixture is cleverly designed to achieve high efficiency reuse. The first fixture has different structures such as coarse end groove, fine end groove, and V-groove at both ends. By flipping it, it can respectively hold the inner ring, outer ring and drive pulley of the bearing, avoiding the cumbersome replacement of multiple sets of fixtures, reducing manufacturing and management costs. In addition, the design of the groove chamfer and the top ring diameter matching the inner and outer rings of the bearing ensures uniform force during pressing and reduces component damage.
[0016] This utility model provides a bearing assembly fixture that can be reused in multiple processes. The assembly process is optimized by the combination of the fixture and hydraulic equipment. The first bearing, the transmission pulley, the bearing washer, and the second bearing are installed in sequence. There is no need for multiple disassembly and adjustment. The direction can be switched by flipping the shaft and the fixture. The constant pressure pressing method driven by hydraulics is more precise than manual operation, avoids bearing misalignment or shaft shoulder wear, and ensures positioning accuracy.
[0017] This utility model provides a bearing assembly fixture that can be reused in multiple processes. The multi-positioning structure and fit design improve the assembly reliability. The shaft shoulder, positioning flange and height-matched bearing washer ring form a multi-level positioning to prevent the bearing from moving axially. The interference fit ensures transmission stability, and the clearance fit facilitates component installation, taking into account both strength and convenience.
[0018] This utility model provides a bearing assembly fixture that can be reused in multiple processes. The fixture has good versatility and adaptability. The same model of bearing and the same top ring size are suitable for similar assembly scenarios. The groove depth design can adapt to tensioning wheel shafts with different shoulder lengths and reduce assembly difficulty. It is suitable for mass production. Precise assembly can reduce bearing friction and noise and extend the service life of transmission components of commercial cleaning robots and other equipment. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0020] Figure 2 This is a schematic diagram of the assembly state of this utility model;
[0021] Figure 3 This is a schematic diagram of the second assembly state of this utility model;
[0022] Figure 4 This is a schematic diagram of the assembly state three of this utility model;
[0023] Figure 5 This is a schematic diagram of the fourth assembly state of this utility model;
[0024] Figure 6 This is a schematic diagram of the transmission component of this utility model.
[0025] The following are the labels in the diagram: 1. First tooling; 2. Second tooling; 3. Tensioner shaft; 4. First bearing; 5. Second bearing; 6. Transmission pulley; 7. Bearing washer; 11. Coarse end groove; 12. First outer ring top ring; 13. Fine end groove; 14. V-groove; 15. Inner ring top ring; 16. Second outer ring top ring; 21. Pulley top ring; 22. Workpiece receiving groove; 31. Shaft shoulder; 61. Positioning flange. Detailed Implementation
[0026] The above-mentioned and other technical features and advantages of this utility model will be described in more detail below with reference to the accompanying drawings.
[0027] Example 1
[0028] like Figure 1-5As shown, this embodiment provides a bearing assembly fixture for multiple processes, used to sequentially mount a first bearing 4, a transmission pulley 6, a bearing washer 7, and a second bearing 5 onto the fixed end of a tensioner shaft 3. The fixture includes a first fixture 1 and a second fixture 2. The first fixture 1 is cylindrical, with a coarse end groove 11 at one end. The groove opening of the coarse end groove 11 is chamfered, and a first outer ring top ring 12 is formed on the end face where the coarse end groove 11 is located. The other end of the first fixture 1 has a fine end groove 13 and a V-groove 14, and an inner ring top ring 15 and a second outer ring top ring 16 are formed on the end face where the fine end groove 13 is located. The second fixture 2 is cylindrical, with a workpiece receiving groove 22 on its upper end face, and a pulley top ring 21 is formed on the end face where the workpiece receiving groove 22 is located.
[0029] The tensioning wheel shaft 3 has a shoulder 31 on its surface; the inner wall of the transmission pulley 6 has a positioning flange 61.
[0030] In this embodiment, by using the first tooling 1 and the second tooling 2, in conjunction with hydraulic equipment, the first bearing 4, the transmission pulley 6, the bearing washer 7, and the second bearing 5 can be sequentially fitted onto the fixed end of the tensioning wheel shaft 3.
[0031] Specifically, refer to Figure 2-5 First, such as Figure 2 As shown, the fixed end of the tension wheel shaft 3 is placed vertically upwards. The first bearing 4 is sleeved on top of the tension wheel shaft 3. Then, the inner ring top ring 15 and the second outer ring top ring 16 of the first tooling 1 abut against the inner and outer rings of the first bearing 4, respectively. The first tooling 1 is pushed downwards using hydraulic equipment, so that the first bearing 4 can be installed on the fixed end of the tension wheel shaft 3. The position of the first bearing 4 is limited by the set shaft shoulder 31.
[0032] Then, as Figure 3 As shown, the first tooling 1 is taken out and rotated 180°. The tensioning wheel shaft 3, on which the first bearing 4 is installed, is also rotated 180°. The tensioning wheel shaft 3 is kept below the first tooling 1. Then, the transmission pulley 6 is placed below the tensioning wheel shaft 3. The first outer ring top ring 12 of the first tooling 1 is pressed against the outer ring of the first bearing 4. The first tooling 1 is pushed down using hydraulic equipment, so that the first bearing 4 can be installed on the inner wall of the transmission pulley 6. The position of the first bearing 4 is limited by the positioning flange 61.
[0033] Finally, as Figure 4 , 5As shown, the tensioner shaft 3 is rotated 180° again, and the transmission pulley 6 is placed on the second fixture 2. The bearing washer 7 is fitted onto the tensioner shaft 3, and the second bearing 5 is fitted between the tensioner shaft 3 and the transmission pulley 6. Then, the first fixture 1 is rotated 180° again, and the inner ring top ring 15 and the second outer ring top ring 16 of the first fixture 1 are respectively pressed against the inner and outer rings of the second bearing 5. The first fixture 1 is pushed downward using hydraulic equipment, and the second bearing 5 is installed on the fixed end of the tensioner shaft 3. The position of the second bearing 5 is defined by the bearing washer 7 and the positioning flange 61. The fixture is then removed to obtain the following: Figure 6 The transmission component shown.
[0034] In order to ensure that the tooling can be used in normal cooperation with the tensioner shaft 3, the diameter of the coarse end groove 11 is larger than the diameter of the tensioner shaft 3, the fine end groove 13 is clearance-fitted with the tensioner shaft 3, and the diameter of the workpiece receiving groove 22 is larger than the diameter of the tensioner shaft 3.
[0035] In the transmission assembly of a commercial cleaning robot, both the first bearing 4 and the second bearing 5 are deep groove ball bearings of the same type. Appropriate bearings can be selected as needed.
[0036] The diameter of the inner ring top ring 15 matches the inner ring diameter of the deep groove ball bearing, and the diameters of the first outer ring top ring 12 and the second outer ring top ring 16 both match the outer ring diameter of the deep groove ball bearing. This ensures that the tooling can mate with the bearing.
[0037] To ensure assembly quality, the tensioner shaft 3 is interference-fitted with the inner ring of the deep groove ball bearing, the outer diameter of the tensioner shaft 3 is clearance-fitted with the inner diameter of the bearing washer 7, and the transmission pulley 6 is interference-fitted with the outer ring of the deep groove ball bearing.
[0038] The diameter of the pulley top ring 21 matches the diameter of the transmission pulley 6, ensuring that the tooling can mate with the bearing.
[0039] The height of the bearing washer 7 is the same as the height of the positioning flange 61, ensuring accurate positioning of the bearing.
[0040] The depths of both the coarse end groove 11 and the workpiece receiving groove 22 are not less than the axial distance from the fixed end of the shoulder 31 to the non-positioning end of the shaft. The fixed end is the bearing mounting end of the tensioner shaft 3, and the non-positioning end is the other end of the tensioner shaft 3. (Refer to...) Figure 1 The fixed end is the upper end of the tension wheel shaft 3, and the non-positioning end is the lower end of the tension wheel shaft 3. The depth of the coarse end groove 11 and the workpiece receiving groove 22 is not less than the vertical distance from the upper side of the shoulder 31 to the lower end of the tension wheel shaft 3.
Claims
1. A bearing assembly fixture for multiple processes, used to sequentially mount a first bearing, a transmission pulley, a bearing washer, and a second bearing onto the fixed end of a tensioner shaft, characterized in that: The fixture includes a first fixture and a second fixture. The first fixture is cylindrical, with a coarse end groove at one end and a chamfer at the opening of the coarse end groove. A first outer ring is formed on the end face with the coarse end groove. The other end of the first fixture has a fine end groove and a V-groove, and an inner ring and a second outer ring are formed on the end face with the fine end groove. The second fixture is cylindrical, with a workpiece receiving groove on its upper end face, and a pulley ring is formed on the end face with the workpiece receiving groove.
2. The bearing assembly fixture for multiple processes according to claim 1, characterized in that, The diameter of the coarse end groove is larger than the diameter of the tension wheel shaft, the fine end groove is clearance-fitted with the tension wheel shaft, and the diameter of the workpiece receiving groove is larger than the diameter of the tension wheel shaft.
3. The bearing assembly fixture for multiple processes according to claim 1, characterized in that, Both the first and second bearings are deep groove ball bearings of the same type.
4. The bearing assembly fixture for multiple processes according to claim 3, characterized in that, The diameter of the inner ring top ring matches the inner ring diameter of the deep groove ball bearing, and the diameters of the first and second outer ring top rings both match the outer ring diameter of the deep groove ball bearing.
5. A bearing assembly fixture for multiple processes according to claim 3, characterized in that, The tensioner shaft is interference-fitted with the inner ring of the deep groove ball bearing, the outer diameter of the tensioner shaft matches the inner diameter of the bearing washer, and the transmission pulley is interference-fitted with the outer ring of the deep groove ball bearing.
6. The bearing assembly fixture for multiple processes according to claim 1, characterized in that, The diameter of the pulley top ring matches the diameter of the drive pulley.
7. The bearing assembly fixture for multiple processes according to claim 1, characterized in that, The surface of the tensioner shaft is provided with a shoulder; the inner wall of the transmission pulley is provided with a positioning flange.
8. A bearing assembly fixture for multiple processes according to claim 7, characterized in that, The height of the bearing washer ring is the same as the height of the positioning flange.
9. A bearing assembly fixture for multiple processes according to claim 7, characterized in that, The depths of both the rough end groove and the workpiece receiving groove are not less than the axial distance from the fixed end of the shaft shoulder to the non-positioning end of the shaft.