Snap spring assembling auxiliary device of isolator assembly structure

Abstract

The utility model belongs to the technical field of motor production, and particularly relates to a snap spring assembly auxiliary device of an isolator assembly structure, which comprises a base, a horizontal positioning mechanism, a support pin and a crimping part, the crimping part is positioned above the support pin, and the vertical position of the crimping part is adjustable; the sliding sleeve is arranged outside the guide column in a sleeving manner and is in axial sliding fit with the guide column, a flaring section is arranged at the lower end of the guide column, and a positioning tip is arranged on the bottom surface of the flaring section; pressing sleeves are arranged at the lower ends of the sliding sleeves; when the sliding sleeve is located at the upper limit position, the flaring section downwards extends out of the pressing sleeve; when the sliding sleeve is located at the lower limit position, the flaring section is located in the pressing sleeve. Pre-positioning and fine positioning of a motor driving cover and an isolator assembly are achieved through a supporting pin and a horizontal positioning mechanism, a pressing connection piece presses a transmission gear downwards to enable a clamp spring groove in a spline shaft to be exposed, a flaring section expands a clamp spring, a sliding sleeve drives a pressing sleeve to press the clamp spring on the flaring section downwards into the clamp spring groove in the spline shaft to complete assembly of the clamp spring, manpower is saved, and the assembly efficiency is improved. The clamp spring assembling efficiency is improved, and the product quality is improved.

Description

Technical Field

[0001] This utility model belongs to the field of motor manufacturing technology, specifically relating to an auxiliary device for assembling a snap ring in a one-way actuator assembly structure. Background Technology

[0002] The one-way valve is used to transmit the torque generated by the electric motor to the flywheel of the vehicle engine, and is a key component of the automotive starter motor. During the starter motor manufacturing process, the one-way valve, motor drive cover, transmission gear, buffer spring, and limiting structure need to be assembled together to form the one-way valve assembly.

[0003] As attached Figure 1-3 As shown, the one-way valve assembly structure includes a motor drive cover 1 and a one-way valve assembly 2. The motor drive cover 1 is provided with a mounting groove 11 and a positioning groove 12 with downward openings and interconnected. The bottom of the mounting groove 11 is provided with a mounting through hole 16. The bottom of the positioning groove 12 is provided with a lower positioning pin 13. The outer edge of the motor drive cover 1 is also provided with two axial through holes 15. The inner edge of the lower end face of the mounting groove 11 is provided with a lower flange 14 of the same shape. The lower flange 14 and the lower end face of the mounting groove 11 form a positioning step structure. The lower positioning pin 13 protrudes from the bottom surface of the lower flange 14. The one-way actuator assembly 2 includes a spline shaft 21 and a one-way actuator 22 mounted on the spline shaft 21. The one-way actuator 22 is installed in the mounting groove 11. The spline shaft 21 passes through the mounting through hole 16 on the motor drive cover 1 and protrudes from the upper and lower end faces of the motor drive cover 1. A pre-positioning hole 23 coaxial with it is provided on the lower end face of the spline shaft 21. A center hole 24 is provided on the upper end face of the spline shaft 21. A retaining ring groove is provided on the side wall of the upper end of the spline shaft 21. A shoulder is provided on the splined shaft 21 protruding from the upper end face of the motor drive cover 1. A buffer spring 25, a transmission gear 26, a limiting sleeve 27, and a retaining ring 28 are sleeved on the shoulder of the splined shaft 21. The transmission gear 26 is a splined sleeve structure, and the spline teeth on its inner wall mesh with the spline teeth on the splined shaft 21. The transmission gear 26 is also provided with a spring hole coaxial with it. The lower end of the buffer spring 25 abuts against the shoulder of the splined shaft 21, and the upper end of the buffer spring 25 extends into the spring hole and abuts against the bottom of the spring hole. The retaining ring 28 is installed in the retaining ring groove. The limiting sleeve 27 is located between the retaining ring 28 and the transmission gear 26. The retaining ring 28 axially limits the limiting sleeve 27. The lower end face of the transmission gear 26 abuts against the shoulder of the splined shaft 21. Under the action of the buffer spring 25 and the retaining ring 28, the inner upper end face of the transmission gear 26 abuts axially against the limiting sleeve 27. The limiting sleeve 27 is provided with a retaining ring sleeve 29 that covers the retaining ring 28. The limiting sleeve 27 and the retaining ring sleeve 29 are integrally formed. An installation gap for installing the retaining ring 28 is formed between the inner wall of the retaining ring sleeve 29 and the side wall of the spline shaft 21.

[0004] In some models of the one-way clutch assembly, the tooth tip diameter of the transmission gear 21 is larger than the diameter of the mounting through hole 16 on the motor drive cover 1. Therefore, during the assembly of this type of one-way clutch assembly, the one-way clutch 22 must first be installed in the mounting groove 11 of the motor drive cover 1 so that the splined shaft 21 passes through the mounting through hole 16 and protrudes upward from the motor drive cover 1. Then, the buffer spring 25, transmission gear 26, and limiting sleeve 27 are assembled. Finally, the retaining ring 28 is installed in the retaining ring groove. Before assembling the retaining ring 28, the one-way clutch 22 needs to be adjusted so that the upper end face of the one-way clutch 22 abuts against the bottom wall of the mounting groove 11, ensuring that the upper end of the splined shaft 21 extends sufficiently beyond the motor drive cover 1. Finally, the operator uses snap ring pliers to enlarge the inner diameter of snap ring 28 before installing it into the snap ring slot. Because the presence of the retaining ring sleeve 29 restricts the external installation space of the snap ring slot, it is crucial to ensure that the outer diameter of the snap ring 28 after enlargement by the snap ring pliers is smaller than the inner diameter of the retaining ring sleeve 29. This ensures that the snap ring 28 smoothly enters the inner cavity of the retaining ring sleeve 29 and is accurately fitted into the snap ring slot. During the installation of snap ring 28, the operator needs to continuously press the transmission gear 26 to lower the retaining ring sleeve 29, ensuring that the snap ring slot on the splined shaft 21 is exposed. The existing snap ring installation method is physically demanding, easily leading to operator fatigue and low snap ring assembly efficiency. Furthermore, during assembly, the snap ring pliers can easily scratch parts such as the transmission gear 26, the limiting sleeve 27, and the retaining ring sleeve 29, affecting product quality. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an auxiliary device for assembling snap rings in a one-way valve assembly structure, so as to reduce labor intensity, improve snap ring assembly efficiency, and improve snap ring assembly quality.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a snap ring assembly auxiliary device for a one-way valve assembly structure, characterized in that: it includes a base, on which a horizontal positioning mechanism, a support pin and a pressing component are provided, the pressing component is located above the support pin and its vertical position is adjustable; it also includes a guide post and a sliding sleeve sleeved on the outside of the guide post, the sliding sleeve being coaxially arranged with the guide post and axially slidingly engaged;

[0007] The guide post has a flared section at its lower end, which is coaxial with the guide post. The outer contour of the flared section is circular. A positioning center is coaxially arranged on the bottom surface of the flared section. The positioning center is adapted to the shape and size of the center hole on the spline shaft. A pressure sleeve is provided at the lower end of the sliding sleeve, which is coaxial with the sliding sleeve.

[0008] When the sliding sleeve is in the upper limit position, the flared section extends downwards from the pressure sleeve; when the sliding sleeve is in the lower limit position, the flared section is located inside the pressure sleeve, and the lower end face of the pressure sleeve is located below the flared section.

[0009] Furthermore, the support pin includes a support pin body and a guide portion disposed above the support pin body. The guide portion is a truncated pyramidal structure or a conical structure that is thinner at the top and thicker at the bottom. The support pin body is a cylindrical structure and its outer diameter is equal to the diameter of the pre-positioning hole on the spline shaft.

[0010] Furthermore, the horizontal positioning mechanism includes two horizontally spaced positioning pins, the distance between the two horizontal positioning pins being equal to the distance between the two axial through holes on the motor drive cover, and the shape and size of the horizontal positioning pins matching the cross-sectional shape and size of the axial through holes.

[0011] Furthermore, the horizontal positioning mechanism includes a positioning support ring plate and a horizontal positioning pin located outside the positioning support ring plate. The axis of the positioning support ring plate and the axis of the horizontal positioning pin are both arranged in the vertical direction. The positioning support ring plate is sleeved on the outside of the support pin and the two are arranged coaxially.

[0012] The inner diameter of the positioning support ring plate is the same as the outer diameter of the lower flange of the motor drive cover. The outer edge of the positioning support ring plate is provided with a notch for accommodating the lower positioning pin of the motor drive cover. The shape and size of the horizontal positioning pin are adapted to the cross-section of the axial through hole.

[0013] Furthermore, a bracket is fixedly installed on the base, and the bracket is provided with a mounting plate protruding from its side wall. The mounting plate is provided with a through circular hole, and a clamping bolt parallel to its axis is provided on the outside of the circular hole. Multiple clamping bolts are provided, and the multiple clamping bolts are evenly distributed along the circumference of the circular hole; the clamping bolt is the crimping member.

[0014] Furthermore, a bracket is fixedly installed on the base, and the crimping member is installed on the bracket;

[0015] The crimping component includes a horizontal quick clamp and a U-shaped pressure plate; the U-shaped pressure plate is located on the bottom surface of the pressure head of the horizontal quick clamp and the side wall of the U-shaped notch of the U-shaped pressure plate is parallel to the pressure arm of the horizontal quick clamp, and the opening of the U-shaped pressure plate faces away from the horizontal quick clamp; the bottom surface of the U-shaped pressure plate is the pressing surface.

[0016] Furthermore, the guide post has a cylindrical structure, and the sliding sleeve has a circular sleeve structure with a sealed upper end and an open lower end.

[0017] Furthermore, the pressure sleeve and the sliding sleeve are integrally formed, and the outer diameter of the pressure sleeve is smaller than the outer diameter of the sliding sleeve.

[0018] Furthermore, a lower limit portion is provided on the side wall of the lower part of the guide post, and an upper limit portion is provided on the inner side wall of the sliding sleeve; when the sliding sleeve moves to the lower limit position, the bottom surface of the upper limit portion abuts against the top surface of the lower limit portion.

[0019] Furthermore, the flared section and the guide post are integrally formed, the flared section is a cylindrical structure and its outer diameter is larger than that of the guide post, the transition surface between the flared section and the guide post 8 is the lower limiting part; the upper limiting part is an annular plate structure that is convex inward on the inner sidewall of the sliding sleeve.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a snap ring assembly auxiliary device for a one-way clutch assembly structure. By setting a support pin, the one-way clutch assembly and the motor drive cover are pre-positioned in the horizontal direction, which facilitates the positioning and assembly of the one-way clutch assembly and the motor drive cover. By setting a horizontal positioning mechanism, the motor drive cover is circumferentially positioned on the spline shaft, which achieves precise positioning of the motor drive cover and the one-way clutch assembly. By setting a pressing piece that cooperates with the support pin to press down the transmission gear, the snap ring groove on the spline shaft is exposed in the annular space formed by the retaining ring sleeve and the spline shaft, which replaces the manual continuous pressing down of the transmission gear. By setting a guide post and a sliding sleeve that slide together, the sliding sleeve can reciprocate along the axial direction of the guide post. By setting a flared section at the lower end of the guide post to expand the snap ring, and by setting a pressure sleeve at the lower end of the sliding sleeve to press the snap ring on the flared section into the snap ring groove on the spline shaft, the snap ring assembly is completed. This reduces the labor intensity of the operators, improves the snap ring assembly efficiency, avoids the snap ring pliers scratching the transmission gear and the limiting sleeve and other parts, and improves product quality. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the axial structure of the one-way valve assembly in the background art;

[0022] Figure 2 This is a schematic diagram of the axial side structure of the one-way valve assembly in the background art from another direction;

[0023] Figure 3 It is along Figure 1 A schematic diagram of the cross-sectional structure along the AA direction of the mid-section line of sight;

[0024] Figure 4 This is a schematic diagram of the axial structure of one embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the assembly structure of one embodiment of the guide post, sliding sleeve, flared section and pressure sleeve;

[0026] Figure 6 yes Figure 5 A schematic diagram of the axial cross-section structure;

[0027] Figure 7 This is a schematic diagram of the snap ring structure used in the assembly of the one-way valve using this utility model;

[0028] Figure 8 yes Figure 7 Front view structural diagram;

[0029] Figure 9 It is along Figure 8 Schematic diagram of the sectional structure of the mid-section line of sight BB;

[0030] Figure 10 yes Figure 9 Enlarged structural diagram of section C;

[0031] Reference numerals: 1-Motor drive cover; 11-Mounting groove; 12-Positioning groove; 13-Lower positioning pin; 14-Lower flange; 15-Axial through hole; 16-Mounting through hole; 2-One-way device assembly; 21-Splined shaft; 22-One-way device; 23-Pre-positioning hole; 24-Top hole; 25-Buffer spring; 26-Transmission gear; 27-Limit sleeve; 28-Snap ring; 29-Retaining ring sleeve; 3-Base; 4-Support pin; 41-Support pin body; 42-Guide part; 5-Horizontal positioning pin; 6-Positioning support ring plate; 7-Crimping part; 71-Bracket; 73-Horizontal quick clamp; 74-U-shaped pressure plate; 8-Guide post; 81-Flanged section; 82-Positioning top; 83-Lower limit part; 9-Sliding sleeve; 91-Pressure sleeve; 92-Upper limit part. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0033] like Figure 4-10As shown, a snap ring assembly auxiliary device for a one-way valve assembly includes a base 3, on which a horizontal positioning mechanism, a support pin 4, and a pressing member 7 are provided. The pressing member 7 is located above the support pin 4 and its vertical position is adjustable. It also includes a guide post 8 and a sliding sleeve 9 sleeved on the outside of the guide post 8. The sliding sleeve 9 is coaxially arranged with the guide post 8 and axially slidingly engaged. The lower end of the guide post 8 has a flared section 81 coaxial with it, and the outer contour of the flared section 81 is circular. A positioning center 82 is coaxially arranged on the bottom surface of the flared section 81, and the shape and size of the positioning center 82 are adapted to the center hole 24 on the spline shaft 21. A pressure sleeve 91 coaxially is provided at the lower end of the sliding sleeve 9. When the sliding sleeve 9 is in the upper limit position, the flared section 81 extends downwards from the pressure sleeve 91. When the sliding sleeve 9 is in the lower limit position, the flared section 81 is located inside the pressure sleeve 91, and the lower end face of the pressure sleeve 91 is below the flared section 81.

[0034] When assembling the one-way valve assembly, first, the pre-positioning hole 23 on the spline shaft 21 is fitted onto the support pin 4 so that the support pin 4 abuts against the bottom surface of the pre-positioning hole 23, thereby achieving the pre-positioning of the one-way valve assembly 2 in the horizontal direction based on the support of the spline shaft 21. Then, the motor drive cover 1 is fitted onto the outside of the one-way valve assembly 2, with the mounting groove 11 on the motor drive cover 1 facing downwards and the one-way valve 22 located inside the mounting groove 11. One end of the spline shaft 21 with the tip hole 24 protrudes upwards through the bottom surface of the mounting groove 11 and out of the motor drive cover 1. The support pin 4 supports the spline shaft 21 so that the upper surface of the one-way valve 22 abuts against the bottom wall of the mounting groove 11. The horizontal positioning mechanism accurately positions the motor drive cover 1 in the horizontal direction, thereby achieving precise positioning of the motor drive cover 1 and the one-way valve assembly 2 in both the horizontal and vertical directions. Then, the buffer spring 25, transmission gear 26, limit sleeve 27 and retaining ring sleeve 29 are sequentially fitted onto the spline shaft 21 from bottom to top. The pressing piece 7 is adjusted so that it abuts against the exposed upper surface of the transmission gear 21, and the transmission gear 21 is pressed down to ensure that the upper end of the spline shaft 21 extends sufficiently beyond the motor drive cover 1 and exposes the retaining ring groove on the spline shaft 21. Finally, the sliding sleeve 9 slides relative to the guide post 8 to its upper limit position, exposing the flared section 81. A retaining ring 28 is fitted onto the flared section 81 of the guide post 8. The positioning tip 82 is inserted into the tip hole 24 of the spline shaft 21, making the guide post 8 and its retaining ring 28 coaxial with the spline shaft 21. The sliding sleeve 9 is then pressed down, causing the pressure sleeve 91 to move downwards, pressing the retaining ring 28 on the flared section 81 into the space between the retaining ring sleeve 29 and the spline shaft 21, until the retaining ring 28 slides down and engages in the retaining ring groove on the spline shaft 21. At this point, the lower end of the pressure sleeve 91 is inserted into the annular space between the spline shaft 21 and the retaining ring sleeve 29, with a clearance fit between the pressure sleeve 91 and the spline shaft 21, and a clearance fit between the pressure sleeve 91 and the retaining ring sleeve 29. The inner diameter of the pressure sleeve 91 should be less than or equal to the outer diameter of the retaining ring 28 fitted on the spline shaft 21 to ensure that the pressure sleeve 91 can continuously press the retaining ring 28 down. The outer diameter of the flared section 81 should be greater than or equal to the outer diameter of the upper end of the spline shaft 21 so that the inner diameter of the retaining ring 28 on the flared section 81 is greater than or equal to the outer diameter of the upper end of the spline shaft 21. This ensures that the pressure sleeve 91 presses down on the retaining ring 28, causing the retaining ring 28 to slide downwards and smoothly engage with the spline shaft 21. "The shape and size of the positioning tip 82 are compatible with the tip hole 24 on the spline shaft 21" means that the shape and size of the tip hole 24 and the positioning tip 82 are identical. When the positioning tip 82 is fully inserted into the tip hole 21, there is no gap between them, facilitating the operator to position the guide post 8 and the spline shaft 21 coaxially.

[0035] This invention achieves pre-positioning of the one-way actuator assembly 2 and the motor drive cover 1 in the horizontal direction by setting a support pin 4, which facilitates the positioning and assembly of the one-way actuator assembly 2 and the motor drive cover 1; it achieves precise positioning of the motor drive cover 1 and the one-way actuator assembly 2 by setting a horizontal positioning mechanism to position the motor drive cover 1 circumferentially on the spline shaft; and it replaces manual continuous operation by setting a pressing piece 7 that cooperates with the support pin 4 to press down the transmission gear 26 to expose the snap ring groove on the spline shaft 21 within the annular space formed by the retaining ring sleeve 29 and the spline shaft 21. The operation of pressing down the transmission gear 26 involves setting up a guide post 8 and a sliding sleeve 9 that slide against each other, allowing the sliding sleeve 9 to reciprocate along the axial direction of the guide post 8. The snap ring 28 is expanded by setting a flared section 81 at the lower end of the guide post 8, and the snap ring 28 on the flared section 81 is pressed down into the snap ring groove on the spline shaft 21 by setting a pressure sleeve 91 at the lower end of the sliding sleeve 9, thus completing the assembly of the snap ring 28. This reduces the labor intensity of the operators, improves the snap ring assembly efficiency, avoids the snap ring pliers scratching the transmission gear 26 and the limiting sleeve 27, and improves product quality.

[0036] The base 3 is used to integrate and install the horizontal positioning mechanism, support pin 4 and pressing part 7. It can be a plate structure or a frame structure. To facilitate the relocation and handling of the base 3, multiple supports 31 are generally provided on the bottom surface of the base 3. The multiple supports 31 are evenly distributed on the bottom surface of the base 2.

[0037] The support pin 4 is used to pre-position and support the one-way actuator assembly 2 in the horizontal direction. It can be a solid structure such as a cylinder, cone, or frustum, or a hollow cylindrical structure. Preferably, the support pin 4 includes a support pin body 41 and a guide portion 42 disposed above the support pin body 41. The guide portion 42 is a frustum or cone structure that is thinner at the top and thicker at the bottom. The support pin body 41 is a cylindrical structure with an outer diameter equal to the diameter of the pre-positioning hole 23 on the spline shaft 21. The design of the guide portion 42 facilitates the insertion of the spline shaft 21 into the support pin 4. The support pin body 41 precisely positions the spline shaft 21, thereby achieving precise horizontal positioning of the one-way actuator assembly 2 and preventing the one-way actuator assembly 2 from deflecting during the installation of the motor drive cover 1, which would affect the installation efficiency of the motor drive cover 1.

[0038] The horizontal positioning mechanism is mainly used to precisely position the motor drive cover 1 on the base 3, preventing the motor drive cover 1 from rotating around the spline shaft 21. The horizontal positioning mechanism can be a two-positioning-pin structure. Specifically, the horizontal positioning mechanism includes two horizontally spaced positioning pins 5, the distance between the two horizontal positioning pins 5 being equal to the distance between the two axial through holes 15 on the motor drive cover 1. The shape and size of the cross-section of the horizontal positioning pins 5 and the axial through holes 15 are adapted to each other. The axes of the horizontal positioning pins 5 are arranged in the vertical direction. When positioning the motor drive cover 1, the two horizontal positioning pins 5 are respectively positioned and inserted into the two axial through holes 15 on the motor drive cover 1, positioning the motor drive cover 1 circumferentially on the spline shaft 21, preventing the motor drive cover 1 from rotating around the one-way actuator assembly 2 and injuring or scratching the operators, thus improving the safety of the assembly operation. "The shape and size of the horizontal positioning pin 5 and the cross-section of the axial through hole 15 are compatible" means that the shape and size of the horizontal positioning pin 5 and the cross-section of the axial through hole 15 are the same. After the motor drives the cover 1 to be horizontally positioned, the horizontal positioning pin 5 and the hole wall of the axial through hole 15 are in clearance fit.

[0039] Although the above-mentioned horizontal positioning mechanism can achieve horizontal positioning of pre-assembled components, after the motor drive cover 1 is assembled, the weight of the motor drive cover 1 is mainly borne by the one-way valve 22, which can easily lead to damage to the one-way valve 22; the weight of the motor drive cover 1 and the one-way valve assembly 2 are also borne by the support pin 4, which can easily lead to deformation or damage to the support pin 4. Preferably, the horizontal positioning mechanism includes a positioning support ring plate 6 and a horizontal positioning pin 5 located outside the positioning support ring plate 6. The axis of the positioning support ring plate 6 and the axis of the horizontal positioning pin 5 are both arranged in the vertical direction. The positioning support ring plate 6 is sleeved on the outside of the support pin 4 and the two are arranged coaxially. The inner diameter of the positioning support ring plate 6 is the same as the outer diameter of the lower flange 14 of the motor drive cover 1. The outer edge of the positioning support ring plate 6 is provided with a notch for accommodating the lower positioning pin 13 of the motor drive cover 1. The shape and size of the horizontal positioning pin 5 are adapted to the cross-sectional shape of the axial through hole 15. When positioning the motor drive cover 1, the lower flange 14 of the motor drive cover 1 is inserted into the circular groove formed by the positioning support ring plate 6, and the outer edge of the lower flange 14 is in contact with the inner sidewall of the positioning support ring plate 6. The positioning support ring plate 6 supports the motor drive cover 1. At this time, the bottom wall of the mounting groove 11 is still in contact with the top surface of the one-way device 22. The positioning support ring plate 6 not only cooperates with the lower flange 14 to position the mounting through hole 16 and the one-way device assembly 2 on the motor drive cover 1 in the horizontal direction, but also shares the pressure applied by the motor drive cover 1 to the one-way device assembly 2 and the support pin 4, avoiding damage to the one-way device 22 and the support pin 4, improving product quality, and extending the service life of the support pin 4. The horizontal positioning pin 5 in this structure is used to prevent the motor drive cover 1 from rotating around the spline shaft 21, ensuring the safety of the assembly operation. Considering that a lower positioning pin 13 is also provided below the motor drive cover 1, in order to avoid interference between the positioning support ring plate 6 and the lower positioning pin 13, the outer edge of the positioning support ring plate 6 is provided with an arc-shaped notch for accommodating the lower positioning pin 13. After the motor drive cover 1 is precisely positioned, the lower positioning pin 13 is located in the arc-shaped notch of the positioning support ring plate 6.

[0040] The crimping member 7 is used to press the transmission gear 26 down to a designated position, causing the limiting sleeve 27 and the retaining ring sleeve 29, which are fitted on the splined shaft 21, to slide down and expose the retaining ring groove on the splined shaft 21. The crimping member 7 can be a ring-shaped pressure plate, a clamping bolt, or a horizontal pin, etc. There are several embodiments of the arrangement of the crimping member 7:

[0041] In embodiment 1, a bracket 71 is fixedly installed on the base 3. The bracket 71 is provided with a mounting plate protruding from its side wall. The mounting plate is provided with a circular hole that runs vertically through it. A clamping bolt parallel to the axis of the circular hole is provided on the outside of the circular hole. Multiple clamping bolts are provided and are evenly distributed along the circumference of the circular hole. The clamping bolt is the crimping member 7.

[0042] Example 2: A bracket 71 is fixedly installed on the base 3. The bracket 71 is provided with a telescopic push rod that extends and retracts in the vertical direction. The telescopic end of the telescopic push rod is arranged downward and an annular pressure plate is installed on it. The annular pressure plate is the pressing member 7.

[0043] In embodiment 3, a bracket 71 is fixedly installed on the base 3, and the crimping member 7 is installed on the bracket 71; the crimping member 7 includes a horizontal quick clamp 73 and a U-shaped pressure plate 74; the U-shaped pressure plate 74 is located on the bottom surface of the pressure head of the horizontal quick clamp 73, and the side wall of the U-shaped notch of the U-shaped pressure plate 74 is parallel to the pressure arm of the horizontal quick clamp 73, and the opening of the U-shaped pressure plate 74 faces away from the horizontal quick clamp 73; the bottom surface of the U-shaped pressure plate 74 is the pressing surface.

[0044] In Embodiment 1, the crimping component 7 is a clamping bolt. Multiple clamping bolts need to be rotated during pressing, which is not only cumbersome but also makes it difficult to ensure that the pressing force is the same for different bolts. In Embodiment 2, the crimping component 7 is an annular pressure plate, driven by a telescopic push rod that extends and retracts in the vertical direction. This telescopic push rod is generally located directly above the assembly station, which is inconvenient for the positioning and assembly of components such as the motor drive cover 1, the one-way actuator assembly 2, and the synchronous gear 3. Compared to Embodiments 1 and 2, in Embodiment 3, the horizontal quick clamp 73, when not clamped, is located on the outer side of the horizontal direction of the assembly station, thus not occupying the space above the assembly station and facilitating the assembly of components such as the motor drive cover 1, the one-way actuator assembly 2, and the synchronous gear 3. The U-shaped opening of the U-shaped pressure plate 74 is used to accommodate structural components such as the spline shaft 21 and the limiting sleeve 27, preventing interference between the U-shaped pressure plate 74 and structures such as the spline shaft 21 and the sliding sleeve 9 of the limiting sleeve 27 during the horizontal rotation and pressing process of the horizontal quick clamp 73. Therefore, the arrangement of the crimping component 7 is preferably in Embodiment 3.

[0045] The guide post 8 ensures that the sliding sleeve 9 slides along its axial direction, and the sliding sleeve 9 drives the pressure sleeve 91 to reciprocate axially. The guide post 8 can be a hollow sleeve structure or a solid cylindrical structure. The sliding sleeve 9 can be a sleeve with open ends or a sleeve structure with a closed top and an open bottom; it can be a sleeve structure with a uniform axial diameter or a stepped sleeve structure with different axial outer diameters. Preferably, the guide post 8 is a cylindrical structure, and the sliding sleeve 9 is a circular sleeve structure with a closed top and an open bottom, which facilitates the operator to slide the sliding sleeve 9 downward by pressing the upper end face of the sliding sleeve 9.

[0046] The flared section 81 is used to expand the retaining ring 28 and ensure that the inner diameter of the expanded retaining ring 28 is greater than or equal to the outer diameter of the upper end of the splined shaft 21, so that the retaining ring 28 can smoothly slide along its axial direction onto the splined shaft 21 under the thrust of the pressure sleeve 91. The outer diameters of the flared section 81 and the guide post 8 can be the same or different. They can be a combined structure connected by threads or pins, or they can be a single integral structure. The flared section 81 is generally a cylindrical structure to prevent the expanded retaining ring 28 from sliding axially. The positioning center 82 at the bottom of the flared section 81 is used to position the flared section 81 and the guide post 8 coaxially.

[0047] The pressure sleeve 91 is used to push the retaining ring 28 on the flared section 81 axially and press it into the retaining ring groove on the splined shaft 21. When the retaining ring 28 is pressed in, the lower end of the pressure sleeve 91 is located in the annular space formed by the splined shaft 21 and the retaining ring sleeve 29. However, the one-way gap between the splined shaft 21 and the retaining ring sleeve 29 is generally less than 0.5 mm. Therefore, the wall thickness of the pressure sleeve 91 is relatively thin. To ensure the strength and ease of use of the sliding sleeve 9, preferably, the pressure sleeve 91 and the sliding sleeve 9 are integrally formed structures, and the outer diameter of the pressure sleeve 91 is smaller than the outer diameter of the sliding sleeve 9.

[0048] During the press-fitting of the retaining ring 28, excessive pressure on the sliding sleeve 9 often causes the retaining ring 28 to be pressed down into the retaining ring groove, leading to the sliding sleeve 9 continuing to press down the pressing sleeve 91. This results in the pressing sleeve 91 damaging or even deforming the portion of the retaining ring 28 protruding from the retaining ring groove, causing the retaining ring 28 to fail. Preferably, a lower limit portion 83 is provided on the lower side wall of the guide post 8, and an upper limit portion 92 is provided on the inner side wall of the sliding sleeve 9. When the sliding sleeve 9 moves to the lower limit position, the bottom surface of the upper limit portion 92 abuts against the top surface of the lower limit portion 83. Here, the lower limit position of the sliding sleeve 9 refers to the vertical position of the sliding sleeve 9 when the retaining ring 28 has been pressed down into the retaining ring groove, preventing the pressing sleeve 91 from damaging the retaining ring 28 assembled in the retaining ring groove and ensuring the assembly quality of the retaining ring 28.

[0049] The lower limiting part 83 can be the top surface of the guide post 8 or a protrusion on its outer side wall. The upper limiting part 92 can be the inner top surface of the sliding sleeve 9 or a protrusion on the inner side wall of the sliding sleeve 9. As a further preferred embodiment, the flared section 81 and the guide post 8 are integrally formed, the flared section 81 is a cylindrical structure with an outer diameter larger than that of the guide post 8, and the transition surface between the flared section 81 and the guide post 8 is the lower limiting part 83; the upper limiting part 92 is an annular plate structure protruding inward on the inner side wall of the sliding sleeve 9. The structure is simple, facilitating the processing and manufacturing of the guide post 8 and the flared section 81, and saving raw materials.

[0050] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A snap ring assembly auxiliary device for a one-way valve assembly structure, characterized in that: It includes a base (3), on which a horizontal positioning mechanism, a support pin (4) and a pressing member (7) are provided. The pressing member (7) is located above the support pin (4) and its vertical position is adjustable. It also includes a guide post (8) and a sliding sleeve (9) sleeved on the outside of the guide post (8). The sliding sleeve (9) is coaxially arranged with the guide post (8) and axially slidingly engaged. The guide post (8) has a flared section (81) coaxial with it at its lower end, and the outer contour of the cross section (81) is circular; a positioning center (82) is coaxially arranged on the bottom surface of the flared section (81), and the positioning center (82) is adapted to the shape and size of the center hole (24) on the spline shaft (21); a pressure sleeve (91) coaxial with it is provided at the lower end of the sliding sleeve (9); When the sliding sleeve (9) is in the upper limit position, the flared section (81) extends downward out of the pressure sleeve (91); when the sliding sleeve (9) is in the lower limit position, the flared section (81) is inside the pressure sleeve (91), and the lower end face of the pressure sleeve (91) is below the flared section (81).

2. The snap ring assembly auxiliary device for the one-way valve assembly structure according to claim 1, characterized in that: The support pin (4) includes a support pin body (41) and a guide part (42) disposed above the support pin body (41). The guide part (42) is a platform structure or a cone structure that is thinner at the top and thicker at the bottom. The support pin body (41) is a cylindrical structure and its outer diameter is equal to the diameter of the pre-positioning hole (23) on the spline shaft (21).

3. The snap ring assembly auxiliary device for the one-way valve assembly structure according to claim 1, characterized in that: The horizontal positioning mechanism includes two horizontally spaced positioning pins (5), the distance between the two horizontal positioning pins (5) is equal to the distance between the two axial through holes (15) on the motor drive cover (1), and the shape and size of the horizontal positioning pins (5) are adapted to the cross-section of the axial through holes (15).

4. The snap ring assembly auxiliary device for the one-way valve assembly structure according to claim 1, characterized in that: The horizontal positioning mechanism includes a positioning support ring plate (6) and a horizontal positioning pin (5) located outside the positioning support ring plate (6). The axis of the positioning support ring plate (6) and the axis of the horizontal positioning pin (5) are both arranged in the vertical direction. The positioning support ring plate (6) is sleeved on the outside of the support pin (4) and the two are arranged coaxially. The inner diameter of the positioning support ring plate (6) is the same as the outer diameter of the lower flange (14) of the motor drive cover (1). The outer edge of the positioning support ring plate (6) is provided with a notch for accommodating the lower positioning pin (13) of the motor drive cover (1). The shape and size of the horizontal positioning pin (5) are adapted to the cross-section of the axial through hole (15).

5. The snap ring assembly auxiliary device for the one-way valve assembly structure according to claim 1, characterized in that: A bracket (71) is fixedly installed on the base (3). The bracket (71) is provided with a mounting plate protruding from its side wall. The mounting plate is provided with a circular hole that runs vertically through it. A clamping bolt parallel to its axis is provided on the outside of the circular hole. Multiple clamping bolts are provided, and the multiple clamping bolts are evenly distributed along the circumference of the circular hole. The clamping bolt is the crimping member (7).

6. The snap ring assembly auxiliary device for the one-way valve assembly structure according to claim 1, characterized in that: A bracket (71) is fixedly installed on the base (3), and the crimping member (7) is installed on the bracket (71); The crimping component (7) includes a horizontal quick clamp (73) and a U-shaped pressure plate (74); the U-shaped pressure plate (74) is located on the bottom surface of the pressure head of the horizontal quick clamp (73) and the side wall of the U-shaped notch of the U-shaped pressure plate (74) is parallel to the pressure arm of the horizontal quick clamp (73); the opening of the U-shaped pressure plate (74) faces away from the horizontal quick clamp (73); the bottom surface of the U-shaped pressure plate (74) is the pressing surface.

7. The snap ring assembly auxiliary device for the one-way valve assembly structure according to claim 1, characterized in that: The guide post (8) is a cylindrical structure, and the sliding sleeve (9) is a circular sleeve structure with a sealed upper end and an open lower end.

8. The snap ring assembly auxiliary device for the one-way valve assembly structure according to claim 7, characterized in that: The pressure sleeve (91) and the sliding sleeve (9) are integrally formed structures, and the outer diameter of the pressure sleeve (91) is smaller than the outer diameter of the sliding sleeve (9).

9. The snap ring assembly auxiliary device for the one-way valve assembly structure according to any one of claims 1-8, characterized in that: The guide post (8) has a lower limit part (83) on its lower side wall and the sliding sleeve (9) has an upper limit part (92) on its inner side wall. When the sliding sleeve (9) moves to the lower limit position, the bottom surface of the upper limit part (92) and the top surface of the lower limit part (83) abut against each other.

10. The snap ring assembly auxiliary device for the one-way valve assembly structure according to claim 9, characterized in that: The flared section (81) and the guide post (8) are integrally formed. The flared section (81) is a cylindrical structure and its outer diameter is larger than that of the guide post (8). The transition surface between the flared section (81) and the guide post (8) is the lower limit part (83). The upper limit part (92) is a ring plate structure that is convex inward on the inner side wall of the sliding sleeve (9).

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