An assembly tool for crossed roller bearings

Abstract

The application provides an assembly tool for a cross-roller bearing, and belongs to the technical field of assembly tools, and comprises a roller feeding assembly, a bearing ring loading mechanism and a roller assembly assembly. The roller feeding assembly comprises a charging hopper and a material conveying pipeline. The bearing ring loading mechanism comprises a bearing ring loading assembly and a bearing ring driving assembly. The roller assembly assembly comprises a roller vacuum suction nozzle and an assembly driving piece. Through the arrangement of the roller feeding assembly, the bearing ring loading mechanism and the roller assembly assembly, the functions of automatic roller feeding, bearing ring positioning and automatic roller assembly in a cross-arrangement mode are realized. Compared with manual assembly, the device not only improves the assembly efficiency, but also effectively avoids the misassembly problems such as non-cross-assembly of rollers caused by human factors.

Description

Technical Field

[0001] This invention belongs to the field of assembly tooling technology, and relates to an assembly tooling for crossed roller bearings. Background Technology

[0002] In the manufacturing process of crossed roller bearings, the assembly of rollers is one of the key processes. Crossed roller bearings are widely used in precision machinery, robot joints, turntables and medical equipment due to their advantages such as high rigidity, high precision and ability to withstand radial and axial loads at the same time. The structural feature of this type of bearing is that the cylindrical rollers are arranged alternately in a 90° cross pattern in the raceway between the inner and outer rings, thereby achieving a uniform distribution of multi-directional loads.

[0003] The assembly of traditional crossed roller bearings mainly relies on manual operation: operators must manually place the rollers one by one into the raceway between the inner and outer rings, ensuring that adjacent rollers are arranged in an orthogonal cross configuration. However, this process has many problems: First, manual assembly is inefficient and cannot meet the needs of mass production; second, due to the small size of the rollers and the strict arrangement requirements, manual operation is prone to problems such as misassembly, omissions, or incomplete crossing of rollers, directly affecting the bearing's rotational accuracy, load-bearing capacity, and service life.

[0004] Therefore, there is an urgent need for a tooling device that can automatically assemble rollers according to a cross pattern, in order to overcome the shortcomings of low efficiency, poor precision and insufficient reliability caused by relying on manual assembly in the existing technology. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in the prior art by proposing an assembly fixture for crossed roller bearings, comprising: A roller feeding assembly includes a hopper and a conveying pipe, wherein the hopper is used to hold rollers and the conveying pipe is used to transport rollers; A bearing ring loading mechanism includes a bearing ring loading assembly and a bearing ring driving assembly, wherein the bearing ring driving assembly can drive the bearing ring loading assembly to rotate about its central axis. A roller assembly assembly includes a roller vacuum nozzle and an assembly drive, the assembly drive being configured to drive the roller vacuum nozzle to place rollers in a cross-arrangement sequentially into the raceway between the inner and outer rings of a bearing, which is carried by the bearing ring loading mechanism.

[0006] In the aforementioned assembly fixture for a crossed roller bearing, the bearing ring loading assembly includes an inner ring support platform and an outer ring support platform. The inner ring support platform and the outer ring support platform are rotatably connected by a damping mechanism, allowing them to rotate relative to each other and generate a damping torque. The output shaft of the bearing ring drive assembly is in contact with the inner ring support platform.

[0007] The assembly fixture for the aforementioned crossed roller bearing also includes a limiting member. The outer ring bearing platform is provided with a limiting surface, and the limiting member is disposed on the side of the outer ring bearing platform. The limiting member can approach or move away from the outer ring bearing platform, thereby contacting the limiting surface and restricting the rotation of the outer ring bearing platform.

[0008] In the above-mentioned assembly fixture for a crossed roller bearing, the assembly drive includes a rotation drive and a push drive. The rotation drive can control the vacuum nozzle to rotate, and the push drive can control the vacuum nozzle to move closer to or further away from the bearing ring loading assembly.

[0009] In the aforementioned assembly fixture for a crossed roller bearing, the roller feeding assembly further includes a feeding block, which can be raised and lowered relative to the vacuum nozzle. One end of the conveying pipe is connected to the loading hopper, and the other end of the conveying pipe is connected to the feeding block.

[0010] In the above-mentioned assembly fixture for a crossed roller bearing, the roller feeding assembly further includes a pusher rod. The feeding block is provided with a first passage, a second passage, and a third passage that are interconnected. The first passage is connected to the conveying pipe. The pusher rod is housed in the second passage. One end of the third passage opens toward the vacuum nozzle and is used to transfer the roller to the vacuum nozzle.

[0011] In the above-mentioned assembly fixture for a crossed roller bearing, the bearing ring drive assembly includes a lifting drive, a rotating drive, and a contact plate. The lifting drive can drive the contact plate to move up and down relative to the inner ring support platform, and the rotating drive can drive the contact plate to rotate, thereby causing the inner ring support platform to rotate.

[0012] The assembly fixture for the aforementioned crossed roller bearing also includes a positioning element, which is connected to the bearing ring drive assembly and can be close to or away from the side of the inner ring support platform.

[0013] In the above-mentioned assembly fixture for a crossed roller bearing, the positioning element is provided with a positioning bevel protrusion. The structure of the positioning bevel protrusion is adapted to cooperate with the hole of the outer ring of the bearing to be assembled, so as to limit the angular position of the outer ring.

[0014] The aforementioned assembly fixture for a crossed roller bearing also includes a laser positioner disposed on the side of the bearing ring loading mechanism away from the roller assembly assembly. The laser positioner is configured to provide a visual reference for aligning the initial position of the hole in the outer ring of the bearing placed on the bearing ring loading mechanism.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: By setting up a roller feeding assembly, a bearing ring loading mechanism, and a roller assembly assembly assembly, the functions of automatic roller feeding, bearing ring positioning, and automatic assembly of rollers in a cross arrangement are realized. Compared with manual assembly, this equipment not only improves assembly efficiency but also effectively avoids misassembly problems such as rollers not being cross-assembled due to human factors. The outer ring support platform and the inner ring support platform are connected by a certain damping. This damping connection allows the two support platforms to rotate relative to each other under specific conditions and can also achieve linkage under the driving action. It can adjust the entire bearing ring and control the rotation of the inner ring to complete the roller assembly. Through the limiting component, two working modes can be realized: synchronous rotation of the entire bearing ring or independent rotation of the inner ring. This can meet the requirement of adjusting the overall orientation of the bearing ring, orienting the hole of the outer ring of the bearing to the preset position for the next assembly, and can also support high-precision step-by-step roller assembly. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention.

[0017] Figure 2 for Figure 1 A magnified view of detail A.

[0018] Figure 3 This is a schematic diagram of the bearing ring loading assembly and roller assembly of the present invention.

[0019] Figure 4 This is a schematic diagram of the bearing ring drive assembly of the present invention.

[0020] Figure 5 This is a schematic diagram of the roller feeding assembly of the present invention.

[0021] Figure 6 This is a cross-sectional view of the feeding block of the present invention.

[0022] In the diagram: 1. Roller feeding assembly; 11. Loading hopper; 12. Conveying pipe; 13. Feeding block; 131. First passage; 132. Second passage; 133. Third passage; 14. Push rod; 2. Bearing ring loading mechanism; 21. Bearing ring loading assembly; 211. Inner ring support platform; 212. Outer ring support platform; 2121. Limiting surface; 22. Bearing ring drive assembly; 221. Lifting drive component; 222. Rotation drive component; 223. Contact plate; 3. Roller assembly assembly; 31. Vacuum nozzle; 32. Assembly drive component; 321. Rotation drive component; 322. Push drive component; 4. Limiting component; 5. Positioning component; 51. Positioning angle protrusion; 6. Laser positioner. Detailed Implementation

[0023] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0024] 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 positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0025] Furthermore, in this invention, descriptions involving terms such as "first," "second," and "a" are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0027] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0028] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

[0029] like Figures 1-6 As shown, an assembly fixture for a crossed roller bearing includes: a roller feeding assembly 1, a bearing ring loading mechanism 2, and a roller assembly assembly 3.

[0030] The roller feeding assembly 1 includes a hopper 11 and a conveying pipe 12. The hopper 11 is used to hold rollers, and the conveying pipe 12 is used to convey rollers.

[0031] The bearing ring loading mechanism 2 includes a bearing ring loading assembly 21 and a bearing ring driving assembly 22, wherein the bearing ring driving assembly 22 can drive the bearing ring loading assembly 21 to rotate around its central axis.

[0032] The roller assembly assembly 3 includes a roller vacuum nozzle 31 and an assembly drive component 32. The assembly drive component 32 is configured to drive the roller vacuum nozzle 31 to place the rollers in a cross arrangement into the raceway between the inner and outer rings of the bearing, which is carried by the bearing ring loading mechanism 2.

[0033] Specifically, the roller loading hopper 11 is adsorbed by the vacuum nozzle 31 through the conveying pipe 12, the bearing ring is placed in the bearing ring loading assembly 21, the assembly drive 32 drives the vacuum nozzle 31 to load the roller into the bearing ring, and the bearing ring drive assembly 22 drives the inner ring of the bearing ring to rotate, thereby moving the loaded roller to load the next roller, and finally completing the sequential cross-assembly of the rollers.

[0034] In this embodiment, by setting up the roller feeding assembly 1, the bearing ring loading mechanism 2, and the roller assembly assembly 3, the functions of automatic roller feeding, bearing ring positioning, and automatic assembly of rollers in a cross arrangement are realized. Compared with manual assembly, this equipment not only improves the assembly efficiency, but also effectively avoids misassembly problems such as rollers not being cross-assembled due to human factors.

[0035] like Figures 1-6 As shown, based on the above embodiment, the bearing ring loading assembly 21 includes an inner ring support platform 211 and an outer ring support platform 212. The inner ring support platform 211 and the outer ring support platform 212 are rotatably connected by a damping mechanism, so that the two can rotate relative to each other and generate a damping torque. The output shaft of the bearing ring drive assembly 22 is in contact with the inner ring support platform 211.

[0036] Specifically, the outer ring support platform 212 is used to position the outer ring of the bearing, and the inner ring support platform 211 is used to position the inner ring of the bearing. The inner ring support platform 211 and the outer ring support platform 212 are connected with a certain damping. When the bearing ring drive assembly 22 drives the inner ring support platform 211 to rotate, it can drive the outer ring support platform 212 to rotate synchronously, thereby controlling the orientation of the entire bearing ring.

[0037] In this embodiment, the outer ring support platform 212 and the inner ring support platform 211 are connected by a certain damping. This damping connection allows the two support platforms to rotate relative to each other under specific conditions, and can also achieve linkage under the driving action. It can adjust the entire bearing ring and control the rotation of the inner ring of the bearing to complete the roller assembly.

[0038] like Figures 1-6As shown, based on the above embodiment, a limiting member 4 is also included. The outer ring support platform 212 is provided with a limiting surface 2121. The limiting member 4 is disposed on the side of the outer ring support platform 212, and the limiting member 4 can approach or move away from the outer ring support platform 212, thereby contacting the limiting surface 2121 and restricting the rotation of the outer ring support platform 212.

[0039] Specifically, when the limiting member 4 approaches the outer ring support platform 212 and contacts the limiting surface 2121 provided thereon, it can form a reliable mechanical constraint on the outer ring support platform 212, keeping it completely stationary during the assembly process. At this time, although the inner ring support platform 211 and the outer ring support platform 212 are still connected by a damped connecting mechanism, the outer ring support platform 212 is rigidly locked by the limiting member 4 and cannot rotate with the inner ring support platform 211. In this state, the bearing ring drive assembly 22 starts and drives the inner ring support platform 211 to rotate. Since the outer ring of the bearing is fixed and the inner ring rotates synchronously with the inner ring support platform 211, the inner ring of the bearing generates a controllable relative rotation with respect to the outer ring of the bearing.

[0040] In this embodiment, the limiting component 4 can realize two working modes: synchronous rotation of the bearing ring as a whole or independent rotation of the inner ring. This can not only meet the requirement of adjusting the overall orientation of the bearing ring and aligning the hole of the outer ring of the bearing to the preset position for the next assembly, but also support high-precision step-by-step roller assembly.

[0041] like Figures 1-6 As shown, based on the above embodiment, the assembly drive component 32 includes a rotation drive component 321 and a push drive component 322. The rotation drive component 321 can control the vacuum nozzle 31 to rotate, and the push drive component 322 can control the vacuum nozzle 31 to move closer to or away from the bearing ring loading assembly 21.

[0042] Specifically, the rotation drive 321 and the push drive 322 work together on the vacuum nozzle 31. The rotation drive 321 drives the vacuum nozzle 31 to rotate precisely 180° around its axis, thereby changing its installation angle in the raceway. When the roller is pushed back into the raceway by the push drive 322, its axial direction is arranged in a cross pattern with the previous roller, realizing the cross assembly of the rollers.

[0043] In this embodiment, by cooperating with the rotating drive 321 and the pushing drive 322, the vacuum nozzle 31 can cyclically pick up, flip and re-insert the roller, completing the assembly of multiple rollers one by one according to a preset cross pattern. This solution not only avoids the operational errors and efficiency bottlenecks of manually flipping the rollers, but also ensures the consistency of the posture and assembly accuracy of each roller.

[0044] like Figures 1-6 As shown, based on the above embodiment, the roller feeding assembly 1 further includes a feeding block 13, which can be raised and lowered relative to the vacuum nozzle 31. One end of the conveying pipe 12 is connected to the loading hopper 11, and the other end of the conveying pipe 12 is connected to the feeding block 13.

[0045] In this embodiment, the lifting and lowering movement of the feeding block 13 can be coordinated with the action rhythm of the vacuum nozzle 31 to achieve precise feeding of the rollers one by one, preventing multiple rollers from entering the nozzle at the same time and causing blockage or misassembly. This not only eliminates problems such as nozzle blockage, vacuum failure or gripping failure caused by multiple rollers being adsorbed at the same time, but also avoids assembly tilting caused by roller misalignment.

[0046] like Figures 1-6 As shown, based on the above embodiment, the roller feeding assembly 1 further includes a pusher rod 14. The feeding block 13 is provided with a first passage 131, a second passage 132 and a third passage 133 that are interconnected. The first passage 131 is connected to the conveying pipe 12. The pusher rod 14 is housed in the second passage 132. One end of the third passage 133 opens toward the vacuum nozzle 31 and is used to transfer the roller to the vacuum nozzle 31.

[0047] Specifically, after the rollers enter the first passage 131 from the conveying pipe 12, they fall into the second passage 132 through the first passage 131 and stack on the first passage 131. The push rod 14 can move back and forth in the second passage 132, thereby pushing the rollers one by one from the second passage 132 to the third passage 133, and finally being adsorbed by the vacuum nozzle 31 from the third passage 133.

[0048] In this embodiment, the combination of this three-channel system with the push rod 14 not only realizes the closed, directional, and single-piece separation of the rollers from the conveying pipe 12 to the vacuum nozzle 31, but also effectively avoids problems such as roller jamming, stacking, misalignment, or even falling.

[0049] like Figures 1-6 As shown, based on the above embodiment, the bearing ring drive assembly 22 includes a lifting drive component 221, a rotating drive component 222, and a contact plate 223. The lifting drive component 221 can drive the contact plate 223 to rise and fall relative to the inner ring support platform 211, and the rotating drive component 222 can drive the contact plate 223 to rotate, thereby driving the inner ring support platform 211 to rotate.

[0050] Specifically, the lifting drive component 221 first drives the contact plate 223 to descend smoothly, so that its lower end face is in close contact with the upper surface of the inner ring support platform 211. At this time, the rotation drive component 222 is started, driving the contact plate 223 to rotate synchronously. The rotational motion is accurately transmitted to the inner ring support platform 211 through static friction, thereby driving the loaded bearing inner ring to rotate continuously.

[0051] In this embodiment, the lifting drive component 221 enables the contact plate 223 and the inner ring support platform 211 to contact each other as needed and separate after use. This avoids the long-term sliding friction between the contact plate 223 and the inner ring support platform 211 caused by the traditional constant meshing or continuous friction drive method, thus extending the service life of key components. At the same time, it does not interfere with the loading and unloading of the bearing ring.

[0052] like Figures 1-6 As shown, based on the above embodiment, a positioning element 5 is also included. The positioning element 5 is connected to the bearing ring drive assembly 22, and the positioning element 5 can be close to or away from the side of the inner ring support platform 211.

[0053] Specifically, the positioning component 5 can reciprocate along the horizontal direction, moving closer to or further away from the side of the inner ring support platform 211. After the bearing ring is installed into the bearing ring loading mechanism 2, the outer ring support platform 212 will rotate with the inner ring support platform 211 and be fixed by the limiting component 4. At this time, the hole on the outer ring of the bearing is near the position required by the pre-approval. At this time, the positioning component 5 moves closer to the hole of the outer ring of the bearing, thereby adjusting the hole of the outer ring of the bearing to the standard position.

[0054] In this embodiment, the positioning member 5 adjusts the position of the hole in the outer ring of the bearing so that the vacuum nozzle 31 can be precisely aligned with the hole in the outer ring of the bearing, and then the rollers are assembled into the raceway position, ensuring that the roller assembly can be accurately embedded into the designed position.

[0055] like Figures 1-6 As shown, based on the above embodiment, the positioning member 5 is provided with a positioning angle protrusion 51. The structure of the positioning angle protrusion 51 is adapted to cooperate with the hole of the outer ring of the bearing to be assembled, so as to limit the angular position of the outer ring.

[0056] In this embodiment, the front end of the positioning member 5 is provided with a positioning bevel protrusion 51. When the positioning member 5 is pushed laterally toward the outer ring of the bearing, if the current hole of the outer ring is not completely aligned with the axis of the positioning member 5, the bevel of the positioning bevel protrusion 51 will first contact the inner wall or hole edge of the outer ring. The lateral force generated by the contact will cause the outer ring to undergo a slight adaptive rotation adjustment on the bearing platform until the edge of the hole is completely engaged with the bevel protrusion. At this time, the center of the hole of the outer ring is precisely aligned with the axis of the positioning member 5, and the circumferential orientation of the hole is uniquely determined, thereby achieving precise constraint on the angular position of the outer ring.

[0057] like Figures 1-6 As shown, based on the above embodiment, a laser positioner 6 is also included. The laser positioner 6 is disposed on the side of the bearing ring loading mechanism 2 away from the roller assembly 3. The laser positioner 6 is configured to provide a visual reference for aligning the initial position of the hole of the bearing outer ring placed on the bearing ring loading mechanism 2.

[0058] In this embodiment, the laser positioner 6 is located on the side away from the roller assembly assembly 3. When assembling the bearing ring, the hole of the bearing outer ring needs to face the side of the laser positioner 6 for initial positioning. After the laser positioner 6 identifies that the hole of the bearing outer ring is within the standard range, the entire bearing ring loading mechanism 2 rotates 180° and then performs secondary positioning through the positioning component 5. The laser positioner 6 can perform initial positioning of the bearing outer ring installation position, providing a positioning basis for the secondary positioning of the positioning component 5.

Claims

1. An assembly fixture for crossed roller bearings, characterized in that, include: A roller feeding assembly includes a hopper and a conveying pipe, wherein the hopper is used to hold rollers and the conveying pipe is used to transport rollers; A bearing ring loading mechanism includes a bearing ring loading assembly and a bearing ring driving assembly, wherein the bearing ring driving assembly can drive the bearing ring loading assembly to rotate about its central axis. A roller assembly assembly includes a roller vacuum nozzle and an assembly drive, the assembly drive being configured to drive the roller vacuum nozzle to place rollers in a cross-arrangement sequentially into the raceway between the inner and outer rings of a bearing, which is carried by the bearing ring loading mechanism.

2. The assembly fixture for a crossed roller bearing as described in claim 1, characterized in that: The bearing ring loading assembly includes an inner ring support platform and an outer ring support platform. The inner ring support platform and the outer ring support platform are rotatably connected by a damping mechanism, so that they can rotate relative to each other and generate a damping torque. The output shaft of the bearing ring drive assembly is in contact with the inner ring support platform.

3. The assembly fixture for a crossed roller bearing as described in claim 2, characterized in that: It also includes a limiting member. The outer ring support platform is provided with a limiting surface. The limiting member is disposed on the side of the outer ring support platform, and the limiting member can be close to or away from the outer ring support platform, so as to contact the limiting surface and thereby restrict the rotation of the outer ring support platform.

4. The assembly fixture for a crossed roller bearing as described in claim 1, characterized in that: The assembly drive includes a rotation drive and a push drive. The rotation drive can control the vacuum nozzle to rotate, and the push drive can control the vacuum nozzle to move closer to or further away from the bearing ring loading assembly.

5. The assembly fixture for a crossed roller bearing as described in claim 1, characterized in that: The roller feeding assembly also includes a feeding block, which can be raised and lowered relative to the vacuum nozzle. One end of the conveying pipe is connected to the loading hopper, and the other end of the conveying pipe is connected to the feeding block.

6. The assembly fixture for a crossed roller bearing as described in claim 5, characterized in that: The roller feeding assembly also includes a pusher rod. The feeding block has a first passage, a second passage, and a third passage that are interconnected. The first passage is connected to the conveying pipe. The pusher rod is housed in the second passage. One end of the third passage opens toward the vacuum nozzle and is used to transfer the roller to the vacuum nozzle.

7. The assembly fixture for a crossed roller bearing as described in claim 2, characterized in that: The bearing ring drive assembly includes a lifting drive component, a rotating drive component, and a contact plate. The lifting drive component can drive the contact plate to move up and down relative to the inner ring support platform, and the rotating drive component can drive the contact plate to rotate, thereby driving the inner ring support platform to rotate.

8. The assembly fixture for a crossed roller bearing as described in claim 2, characterized in that: It also includes a positioning element, which is connected to the bearing ring drive assembly and can be close to or away from the side of the inner ring support platform.

9. The assembly fixture for a crossed roller bearing as described in claim 8, characterized in that: The positioning component is provided with a positioning bevel protrusion, the structure of which is adapted to mate with the hole in the outer ring of the bearing to be assembled, so as to limit the angular position of the outer ring.

10. The assembly fixture for a crossed roller bearing as described in claim 1, characterized in that: It also includes a laser locator disposed on the side of the bearing ring loading mechanism away from the roller assembly, the laser locator being configured to provide a visual reference for aligning the initial position of the hole in the outer ring of the bearing placed on the bearing ring loading mechanism.

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