Pressing check ring limiting tool
By designing a stop ring limit tool for electric actuators, the problem of inaccurate positioning of nuts and stop rings is solved, precise positioning is achieved, and the defect rate and manufacturing cost are reduced.
Patent Information
- Application Number
- CN202420719362.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-09
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-04-09
AI Technical Summary
During the assembly process of existing electric high-precision actuators, the nuts and retaining rings cannot be accurately positioned, resulting in high defect rate and low stroke consistency.
A pressure retaining ring limit tool is designed, including a base, limiting pillar and limiting member. The positions of the nut and retaining ring are accurately positioned through the first limiting groove and the second limiting groove of the limiting member to ensure that the nut is blocked by the retaining ring at the end of the stroke and maintain a preset clearance.
The precise positioning of screws, nuts and retaining rings is achieved, reducing the defect rate and production cost, and it also has the advantages of simple structure, convenient operation, small size and low manufacturing cost.
Smart Images
Figure CN222857868U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, in particular to a retaining ring limiting tooling. Background Art
[0002] An electric actuator is a device that can convert electrical energy into mechanical motion. With the development of automation technology, electric actuators are widely used.
[0003] like Figure 1 The high-precision electric actuator has a nut that moves along the axial direction of the screw rod. Because the nut has a limit requirement at the stroke zero point and the stroke end point, a retaining ring is provided on the screw rod so that when the nut moves from the stroke zero point to the stroke end point, the side of the first boss on the nut just conflicts with the side of the second boss on the retaining ring, and there is a certain gap between the end face of the nut and the end face of the retaining ring to avoid the end face of the nut and the end face of the retaining ring being closely fitted to affect the resetting of the nut. Therefore, the electric actuator has high requirements for the positioning of the nut and the retaining ring during the assembly process.
[0004] However, the inventors have found that during the assembly process of the current electric actuator, the nut and the retaining ring are visually aligned, and then the retaining ring is crimped onto the screw, which leads to a high defect rate of the electric actuator, a large phase difference after the electric actuator is returned to its original position, and low stroke consistency of the electric actuator. Utility Model Content
[0005] The technical problem to be solved by the utility model is to provide a retaining ring limiting tooling to solve the problem that the retaining ring and the nut of the current electric high-precision electric actuator cannot be accurately positioned, resulting in a high defect rate and low stroke consistency of the electric actuator.
[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is: a pressure retaining ring limiting tooling, including a base, a limiting pillar and a limiting member, the two ends of the limiting pillar are respectively abutted against the upper surface of the base and the lower surface of the limiting member, the limiting member is provided with a limiting hole passing through in the vertical direction, the top of the limiting member is provided with a first limiting groove connected to the limiting hole, and the bottom of the limiting member is provided with a second limiting groove connected to the limiting hole.
[0007] Furthermore, the limiting member includes a slide plate and a fixed plate, the slide plate is slidably disposed on the top of the fixed plate, the slide plate is provided with a first through hole, the fixed plate is provided with a second through hole connected to the first through hole, so that the first through hole and the second through hole constitute the limiting hole, the slide plate is provided with the first limiting groove, the first limiting groove is connected to the first through hole, the fixed plate is provided with the second limiting groove, and the second limiting groove is connected to the second through hole.
[0008] Furthermore, the fixing plate is provided with a protrusion, the sliding plate is provided with a sliding hole, and the protrusion can slidably pass through the sliding hole.
[0009] Furthermore, the thickness of the protrusion is greater than the thickness of the slide plate.
[0010] Furthermore, it also includes a bolt and a baffle, wherein the baffle is arranged on the top of the limiting pillar, a third through hole is opened on the baffle, a first screw hole is arranged on the protrusion, and a second screw hole is arranged on the limiting pillar, and the bolt passes through the third through hole, the first screw hole and the second screw hole in sequence.
[0011] Furthermore, the fixing plate is provided with a stepped groove around the edge of the second through hole, and the first limiting groove is provided on the stepped groove.
[0012] Furthermore, the limiting member is provided with a first opening connected to the limiting hole.
[0013] Furthermore, a limiting groove is provided on the base, and a second opening communicating with the limiting groove is provided on the side wall of the base.
[0014] Furthermore, it also includes a pressing piece arranged directly above the limiting hole.
[0015] Furthermore, a pressing groove is provided at the bottom of the pressing member.
[0016] The beneficial effect of the utility model is that the retaining ring limiting fixture described in the utility model determines the gap that needs to be reserved between the nut at the starting point of the stroke and the retaining ring according to the lead of the screw and the positions of the nut's stroke zero point and stroke end point on the screw, thereby determining the height of the limiting pillar, and the relative circumferential position between the first protrusion and the second protrusion is respectively determined by the first limiting groove and the second limiting groove of the limiting member to ensure that when the nut moves from the stroke zero point to the stroke end point on the screw, the first boss of the nut is just blocked by the second boss of the retaining ring, and there is a gap of a preset distance between the upper end face of the nut and the lower end face of the retaining ring. The retaining ring limiting fixture described in the utility model can accurately position the screw, nut and retaining ring, thereby solving the problem of inaccurate positioning and high defective rate between the nut and the retaining ring on the screw caused by visual positioning of the electric actuator. Accordingly, the retaining ring limiting fixture can reduce the production cost of the electric actuator. In addition, the retaining ring limiting fixture provided by the utility model also has the advantages of simple structure, easy operation, small size and low manufacturing cost. The retaining ring limiting fixture has excellent prospects for promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a structural schematic diagram of an electric actuator;
[0018] Figure 2 This is a structural schematic diagram of the retaining ring limiting tooling described in the utility model;
[0019] Figure 3 for Figure 2 Exploded diagram of the structure;
[0020] Figure 4 for Figure 2 A schematic diagram of the structure of the middle limiter;
[0021] Figure 5 The diagram schematically shows the state of the electric actuator placed on the retaining ring limit fixture;
[0022] Figure 6 for Figure 5 Enlarged view of part A;
[0023] Figure 7 for Figure 2 Schematic diagram of the structure of the middle and lower pressure parts.
[0024] Description of labels:
[0025] 1. Screw;
[0026] 2. nut; 21. first boss;
[0027] 3. retaining ring; 31. second boss;
[0028] 4. base; 41. limiting groove; 42. second opening;
[0029] 5. Limiting support; 51. Second screw hole;
[0030] 6. Limiting member; 61. Limiting hole; 62. Slide plate; 621. First limiting groove; 622. First through hole; 623. Sliding hole; 624. First opening; 63. Fixing plate; 631. Second limiting groove; 632. Second through hole; 633. Protrusion; 634. First screw hole; 635. Step groove; 636. Second opening; 64. First open opening;
[0031] 7. Bolts;
[0032] 8. Pressing piece; 81. Pressing groove;
[0033] 9. Block piece. DETAILED DESCRIPTION
[0034] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.
[0035] Please refer to Figures 2 to 7A retaining ring limiting tooling comprises a base 4, a limiting pillar 5 and a limiting member 6, wherein the two ends of the limiting pillar 5 are respectively in contact with the upper surface of the base 4 and the lower surface of the limiting member 6, and the limiting member 6 is provided with a limiting hole 61 which passes through in the vertical direction, and the top of the limiting member 6 is provided with a first limiting groove 621 which is connected to the limiting hole 61, and the bottom of the limiting member 6 is provided with a second limiting groove 631 which is connected to the limiting hole 61.
[0036] The structural principle of the utility model is briefly described as follows: The retaining ring limit tooling designed by the utility model is specifically used for assembling such as Figure 1 The electric actuator shown in the figure, wherein the retaining ring 3 of the electric actuator is fixed in the axial position of the screw 1 after the crimping operation is completed; therefore, the retaining ring limiting tooling determines the gap that needs to be reserved between the nut 2 and the retaining ring 3 at the starting point of the stroke according to the lead of the screw 1 and the positions of the stroke zero point and the stroke end point of the nut 2 on the screw 1, thereby determining the height of the limiting pillar 5, and through the first limiting groove 621 and the second limiting groove 631 of the limiting member 6, the relative circumferential position between the first boss 21 and the second boss 31 is respectively determined to ensure that when the nut 2 moves from the stroke zero point to the stroke end point on the screw 1, the first boss 21 of the nut 2 is just blocked by the second boss 31 of the retaining ring 3, and there is a gap of a preset distance between the upper end face of the nut 2 and the lower end face of the retaining ring 3.
[0037] In actual application, the screw 1 is pre-matched with the nut 2, the screw 1 is positioned in the limiting hole 61, and one end of the screw 1 is abutted against the base 4, the nut 2 and the screw 1 rotate relative to each other to adjust the nut 2 to abut against the lower surface of the limiting member 6 at its upper end surface, and the first boss 21 of the nut 2 is arranged in the second limiting groove 631, so that the base 4 and the lower surface of the limiting member 6 can accurately position the stroke zero point of the nut 2 in the axial position of the screw 1, wherein the distance between the base 4 and the lower surface of the limiting member 6 can be adjusted by changing the height of the limiting pillar 5; the retaining ring 3 is placed on the top of the limiting member 6, and the second boss 31 of the retaining ring 3 is positioned in the first limiting groove 621, and the relative circumferential position between the second boss 31 of the retaining ring 3 and the first boss 21 of the nut 2 plays a role in precise positioning.
[0038] From the above description, it can be seen that the beneficial effects of the utility model are: the retaining ring limiting fixture described in the utility model can accurately position the screw 1, the nut 2 and the retaining ring 3, and solves the problem of inaccurate positioning and high defective rate between the nut 2 and the retaining ring 3 on the screw 1 due to visual positioning of the electric actuator. Accordingly, the retaining ring limiting fixture can reduce the production cost of the electric actuator. In addition, the retaining ring limiting fixture provided by the utility model also has the advantages of simple structure, easy operation, small size and low manufacturing cost. The retaining ring limiting fixture has excellent promotion and application prospects.
[0039] Furthermore, the limiting member 6 includes a slide plate 62 and a fixed plate 63, the slide plate 62 is slidably disposed on the top of the fixed plate 63, the slide plate 62 is provided with a first through hole 622, the fixed plate 63 is provided with a second through hole 632 connected to the first through hole 622, so that the first through hole 622 and the second through hole 632 form the limiting hole 61, the slide plate 62 is provided with the first limiting groove 621, the first limiting groove 621 is connected to the first through hole 622, the fixed plate 63 is provided with the second limiting groove 631, and the second limiting groove 631 is connected to the second through hole 632.
[0040] From the above description, it can be seen that the aperture of the first through hole 622 can be larger than the aperture of the second through hole 632. The retaining ring limiting tooling uses the sliding slide 62 to make the second boss 31 of the retaining ring 3 engage in or disengage from the first limit, so as to improve the convenience of placing or removing the electric actuator by the retaining ring limiting tooling.
[0041] Furthermore, a protrusion 633 is provided on the fixing plate 63 , and a sliding hole 623 is opened on the sliding plate 62 , and the protrusion 633 can slidably pass through the sliding hole 623 .
[0042] It can be seen from the above description that the corresponding design of the size of the sliding hole 623 can limit the relative sliding distance and path between the fixed plate 63 and the sliding plate 62 .
[0043] Furthermore, the thickness of the protrusion 633 is greater than the thickness of the slide plate 62 .
[0044] Furthermore, it also includes a bolt 7 and a baffle 9, the baffle 9 is arranged on the top of the limiting pillar 5, the baffle 9 is provided with a third through hole, the protrusion 633 is provided with a first screw hole 634, the limiting pillar 5 is provided with a second screw hole 51, and the bolt 7 passes through the third through hole, the first screw hole 634 and the second screw hole 51 in sequence.
[0045] From the above description, it can be seen that the limiting member 6 and the limiting pillar 5 are locked and fixed by the bolt 7, and the baffle 9 can prevent the slide plate 62 from separating from the fixed plate 63; wherein, the thickness of the protrusion 633 is greater than the thickness of the slide plate 62, and after tightening the screws, there is still a certain space between the lower surface of the baffle 9 and the upper surface of the fixed plate 63 for the slide plate 62 to move freely.
[0046] Furthermore, the fixing plate 63 is provided with a stepped groove 635 around the edge of the second through hole 632 , and the first limiting groove 621 is provided on the stepped groove 635 .
[0047] In some preferred embodiments of the present invention, after the retaining ring 3 completes the crimping operation, the lower end surface of the retaining ring 3 abuts against the bottom of the stepped groove 635 .
[0048] Furthermore, the limiting member 6 is provided with a first opening 64 communicating with the limiting hole 61 .
[0049] Furthermore, a limiting groove 41 is provided on the base 4 , and a second opening 42 communicating with the limiting groove 41 is provided on the side wall of the base 4 .
[0050] It can be seen from the above description that the retaining ring limiting tool can place or take out the screw rod 1 through the opening, which makes the retaining ring limiting tool easy and quick to operate.
[0051] Furthermore, it also includes a pressing member 8 arranged directly above the limiting hole 61.
[0052] It can be seen from the above description that the pressing member 8 is used to press the retaining ring 3 onto the screw rod 1, which can improve the assembly efficiency of the retaining ring limiting tooling.
[0053] In some preferred embodiments, the pressing member 8 can be connected to a driving mechanism (eg, a mechanical device such as a cylinder or a press) to achieve automatic crimping, and the driving mechanism can adjust the crimping formation of the pressing member 8 .
[0054] Furthermore, a pressing groove 81 is provided at the bottom of the pressing member 8 .
[0055] It can be seen from the above description that during crimping, the other end of the screw rod 1 enters the lower pressing groove 81 .
[0056] Embodiment 1:
[0057] Please refer to Figures 1 to 7The first embodiment of the utility model is to provide a retaining ring limiting tooling, a base 4, a limiting pillar 5, a limiting member 6 and a pressing member 8, the two ends of the limiting pillar 5 are respectively abutted against the upper surface of the base 4 and the lower surface of the limiting member 6, the limiting member 6 is provided with a limiting hole 61 that passes through in the vertical direction, the top of the limiting member 6 is provided with a first limiting groove 621 that is connected to the limiting hole 61, the bottom of the limiting member 6 is provided with a second limiting groove 631 that is connected to the limiting hole 61, and the pressing member 8 is arranged directly above the limiting hole 61.
[0058] The retaining ring limiting tool provided in the first embodiment is specifically used for assembling Figure 1 The electric actuator shown in the figure has a nut 2 that moves along the axial direction of the screw rod 1. When the nut 2 moves to the end of the stroke, the second boss 31 of the retaining ring 3 blocks the first stopper of the nut 2 to stop the nut 2 from moving. Specifically, in order to avoid the upper end face of the nut 2 and the lower end face of the retaining ring 3 from being tightly fitted together, which may cause the electric actuator to suffocate, a certain gap needs to be left between the upper end face of the nut 2 and the lower end face of the retaining ring 3 when the nut 2 moves to the end of the stroke. Among them, the lead of the screw rod 1 is fixed, and the axial position of the retaining ring 3 on the screw rod 1 is fixed after being crimped into place. Therefore, during the assembly process, the axial position of the nut 2 at the stroke zero point on the screw rod 1 and the relative circumferential position between the first boss 21 and the second boss 31 at the stroke zero point of the nut 2 need to be accurately positioned.
[0059] To this end, in the first embodiment, the height of the limiting pillar 5 is set according to the preset axial position of the screw 1 at the stroke zero point of the nut 2, so that the limiting pillar 5 limits the distance between the upper surface of the base 4 and the lower surface of the limiting member 6. In actual application, the screw 1 and the nut 2 are pre-assembled, and the screw 1 is arranged in the limiting hole 61, and one end of the screw 1 abuts on the base 4. By controlling the relative rotation between the screw 1 and the nut 2, the nut 2 is adjusted to a state where its first boss 21 is arranged in the second limiting groove 631 and the upper end face of the nut 2 abuts against the lower surface of the limiting member 6, so as to accurately position the stroke zero point of the nut 2 in the axial position of the screw 1, and then the pressing ring is positioned and placed so that the second boss 31 of the pressing ring is located in the first limiting groove 621, so that the relative axial position between the first boss 21 and the second boss 31 is accurately positioned, and finally the pressing ring is crimped onto the screw 1. Therefore, when the nut 2 of the electric actuator moves from the stroke zero point to the stroke end point, the second boss 31 can just block the first boss 633 to prevent the nut 2 from rotating, thereby serving as a stop for the nut 2, and there can just be a reserved gap L between the upper end face of the nut 2 and the lower end face of the retaining ring 3.
[0060] Specifically, in the retaining ring limiting tooling designed in the first embodiment of the present invention, the limiting member 6 includes a slide plate 62 and a fixed plate 63. The slide plate 62 is slidably arranged on the top of the fixed plate 63. A first through hole 622 is provided on the slide plate 62. A second through hole 632 connected to the first through hole 622 is provided on the fixed plate 63, so that the first through hole 622 and the second through hole 632 form a limiting hole 61. The slide plate 62 is provided with a first limiting groove 621, which is connected to the first through hole 622. The fixed plate 63 is provided with a second limiting groove 631, which is connected to the second through hole 632. In addition, the fixed plate 63 and the slide plate 62 are respectively provided with a first opening 624 and a second opening 636, which are connected to the first through hole 622 and the second opening 636 are connected to the second through hole 632, so that the first opening 624 and the second opening 636 form a first opening 64. In actual application, the opening can be used to facilitate the placement or removal of the screw 1 by the limiting member 6 , and the retaining ring limiting tool can engage or disengage the second protrusion 633 with the first limiting groove 621 by sliding the slide plate 62 .
[0061] In the first embodiment, in order to limit the relative sliding between the fixed plate 63 and the sliding block, a protrusion 633 is provided on the fixed plate 63, and a sliding hole 623 is opened on the sliding block 62. The protrusion 633 passes through the sliding hole 623, and the protrusion 633 can slide along the length direction of the sliding hole 623.
[0062] Specifically, the retaining ring limiting tooling also includes a bolt 7 and a retaining plate 9. The retaining plate 9 is arranged on the top of the limiting pillar 5. The retaining plate 9 is provided with a third through hole. The protrusion 633 is provided with a first screw hole 634. The limiting pillar 5 is provided with a second screw hole 51. The base 4 is provided with a third screw hole. The bolt 7 passes through the third through hole, the first screw hole 634, the second screw hole 51 and the third screw hole in sequence. The base 4, the limiting pillar 5 and the limiting member 6 are locked and fixed by the bolt 7. Specifically, the thickness H1 of the protrusion 633 is greater than the thickness H2 of the slide plate 62, so that after the screw is locked, there is still a gap between the lower surface of the retaining plate 9 and the upper surface of the fixing plate 63 for the slide plate 62 to move freely.
[0063] like Figure 3As shown, the fixed plate 63 is provided with a stepped groove 635 around the edge of the second through hole 632, and the first limiting groove 621 is provided on the stepped groove 635. When the retaining ring 3 completes the crimping operation, the lower end surface of the retaining ring 3 abuts against the bottom of the stepped groove 635. Therefore, the stepped groove 635 can limit the axial position of the retaining ring 3 crimped on the screw 1, and the thickness between the bottom of the stepped groove 635 and the lower surface of the fixed plate 63 can be set according to actual needs. Of course, in other preferred embodiments of the utility model, the axial position of the retaining ring 3 crimped on the screw 1 can be limited by the slide plate 62; or, a limiting protrusion is provided on the screw 1, and when the baffle is crimped in place, the limiting protrusion abuts against the baffle, which can also limit the axial position of the baffle crimped on the screw 1.
[0064] In the first embodiment of the present invention, a limiting groove 41 is provided on the base 4, and a second opening 42 connected to the limiting groove 41 is provided on the side wall of the base 4. In actual application, the screw 1 can be set in the limiting groove 41, which can play a better limiting and fixing role for the screw 1, and the screw 1 can be easily removed from the limiting groove 41 through the second opening 42.
[0065] In the first embodiment, the bottom of the pressing member 8 is provided with a pressing groove 81 corresponding to the other end of the screw rod 1. During the crimping process, the pressing groove 81 is sleeved on the other end of the screw rod 1. Specifically, the pressing member 8 can be connected to a press, and a crimping formation is provided on the press to drive the pressing member 8 to press the retaining ring 3 into the screw rod 1.
[0066] To sum up, the retaining ring limiting fixture described in the utility model can accurately position the screw 1 and the nut 2, and solves the problem of inaccurate positioning and high defective rate between the nut 2 on the screw 1 and the retaining ring 3 caused by visual positioning of the electric actuator. Accordingly, the retaining ring limiting fixture can reduce the production cost of the electric actuator. In addition, the retaining ring limiting fixture provided by the utility model also has the advantages of simple structure, easy operation, small size and low manufacturing cost. The retaining ring limiting fixture has excellent promotion and application prospects.
[0067] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.
Claims
1. A retaining ring limiting tool, characterized in that: It includes a base, a limiting pillar and a limiting member, wherein two ends of the limiting pillar are respectively abutted against the upper surface of the base and the lower surface of the limiting member, the limiting member is provided with a limiting hole which passes through in the vertical direction, the top of the limiting member is provided with a first limiting groove which is connected to the limiting hole, and the bottom of the limiting member is provided with a second limiting groove which is connected to the limiting hole.
2. The retaining ring limiting tooling according to claim 1 is characterized in that: The limiting member includes a slide plate and a fixed plate, the slide plate is slidably disposed on the top of the fixed plate, the slide plate is provided with a first through hole, the fixed plate is provided with a second through hole connected to the first through hole, so that the first through hole and the second through hole constitute the limiting hole, the slide plate is provided with the first limiting groove, the first limiting groove is connected to the first through hole, the fixed plate is provided with the second limiting groove, and the second limiting groove is connected to the second through hole.
3. The retaining ring limiting tooling according to claim 2 is characterized in that: The fixing plate is provided with a protrusion, the sliding plate is provided with a sliding hole, and the protrusion can slidably pass through the sliding hole.
4. The retaining ring limiting tooling according to claim 3 is characterized in that: The thickness of the protrusion is greater than the thickness of the slide plate.
5. The retaining ring limiting tooling according to claim 3 is characterized in that: It also includes a bolt and a baffle, wherein the baffle is arranged on the top of the limiting pillar, a third through hole is opened on the baffle, a first screw hole is arranged on the protrusion, and a second screw hole is arranged on the limiting pillar, and the bolt passes through the third through hole, the first screw hole and the second screw hole in sequence.
6. The retaining ring limiting tooling according to claim 2 is characterized in that: The fixing plate is provided with a stepped groove around the edge of the second through hole, and the first limiting groove is provided on the stepped groove.
7. The retaining ring limiting tooling according to claim 1 is characterized in that: The limiting member is provided with a first opening which is communicated with the limiting hole.
8. The retaining ring limiting tooling according to claim 1 is characterized in that: The base is provided with a limiting groove, and the side wall of the base is provided with a second opening communicated with the limiting groove.
9. The retaining ring limiting tooling according to claim 1 is characterized in that: It also includes a pressing piece arranged just above the limiting hole.
10. The retaining ring limiting tooling according to claim 9, characterized in that: A pressing groove is provided at the bottom of the pressing member.