A spring press tool for a rearview mirror hinge shaft

Abstract

The present application relates to the technical field of rearview mirror assembly, especially to a spring crimping tool for rearview mirror hinging shaft, comprising a base, a press-fitting assembly and a feeding assembly, the press-fitting assembly comprises a crimping sleeve and a first driving member, which is used for axially compressing the spring assembly to expose the clamping groove on the connecting shaft; the feeding assembly comprises a feeding seat and a second driving member used for horizontally pushing the clamping spring piece in the feeding seat into the clamping groove; the first sensor and the second sensor are arranged at the same horizontal height in the crimping sleeve, the first sensor is used for detecting the first distance of the end face of the connecting shaft, and the second sensor is used for detecting the second distance of the end face of the spring assembly; the first distance and the second distance are compared, the driving distance of the first driving member to the spring assembly is controlled, when the distance difference between the two reaches a preset threshold value, the second driving member is controlled to start, the automatic operation is realized, the risk of manual operation is avoided, the assembly time is effectively shortened, and the production efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of rearview mirror assembly technology, and in particular to a spring pressing tool for a rearview mirror hinge shaft. Background Technology

[0002] The exterior rearview mirrors are located on the left and right sides of the front of the car. They reflect the situation behind, to the side and below the car, allowing the driver to indirectly see the situation in these positions. They act as a "second eye" to expand the driver's field of vision.

[0003] In the prior art, the base of the rearview mirror is hinged to the bracket, and the sleeve of the base is sleeved on the positioning shaft of the bracket, forming an annular cavity between the positioning shaft and the sleeve. During assembly, the spring assembly needs to be fitted into the annular cavity first. By applying downward pressure to the spring assembly, the spring is compressed a certain distance, and the slot on the connecting shaft is higher than the top surface of the spring assembly. By inserting the retaining spring into the retaining groove of the connecting shaft, the spring assembly is axially limited on the positioning shaft.

[0004] However, the current traditional method is to manually press the spring assembly and install the retaining clips using tools. This method is time-consuming, labor-intensive, and inefficient. Moreover, because the spring has a reaction force, the retaining clips may cause accidental injury to the operator during assembly, posing a safety hazard. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a spring pressing tool for a rearview mirror hinge shaft, which effectively solves the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: a spring pressing tool for a rearview mirror hinge shaft, comprising:

[0007] The base has a first positioning surface for placing a rearview mirror bracket and a second positioning surface for placing a rearview mirror mounting base;

[0008] A press-fit assembly, disposed above the base, includes a press-fit sleeve and a first drive member, used to axially compress the spring assembly to expose the groove on the connecting shaft;

[0009] The feeding assembly is disposed on one side of the base and includes a feeding seat and a second driving member for horizontally pushing the retaining spring in the feeding seat into the slot;

[0010] A first sensor and a second sensor are installed at the same horizontal height inside the crimping sleeve. The first sensor is used to detect the distance to the end face of the connecting shaft to obtain a first distance, and the second sensor is used to detect the distance to the end face of the spring assembly to obtain a second distance.

[0011] By comparing the first distance and the second distance, the driving distance of the first driving component to the spring assembly is controlled, and when the difference between the two distances reaches a preset threshold, the second driving component is activated.

[0012] Furthermore, positioning grooves are provided on both the first positioning surface and the second positioning surface.

[0013] Furthermore, the crimping sleeve is divided into a connecting section and a force-applying section along the axial direction. The connecting section is a solid structure, and the force-applying section is a hollow structure.

[0014] Two abutment blocks are symmetrically arranged at the bottom of the force-applying section, and the distance between the two abutment blocks is greater than the width of the retaining spring.

[0015] Furthermore, a front groove and a rear groove are formed between the two abutting blocks;

[0016] The front groove is positioned facing the feeding assembly, and a stepped groove is provided at the rear groove.

[0017] Furthermore, the length of the force-applying section is greater than the distance from the slot to the end face of the connecting shaft.

[0018] Furthermore, the crimping sleeve is made of high-strength alloy steel.

[0019] Furthermore, when the spring assembly is driven axially by the first driving member, it sequentially performs a pre-compression stage, a main compression stage, and a pressure holding stage;

[0020] During the pre-compression stage, the crimping sleeve is driven to contact the spring assembly;

[0021] During the main pressure stage, the pressing sleeve is driven to compress the spring assembly. The spring assembly is compressed to the level of the end face of the connecting shaft, which is the first stroke segment, and compressed to the level of the slot, which is the second stroke segment. The conveying speed of the first stroke segment is greater than the moving speed of the second stroke segment.

[0022] During the pressure holding phase, the spring assembly remains in a compressed state in the second stroke segment until the retaining spring is fully assembled.

[0023] Furthermore, the feeding assembly also includes a fixing seat, the feeding seat being disposed above the fixing seat and sliding horizontally relative to the fixing seat;

[0024] A positioning arc groove and a positioning guide groove are provided on the side wall of the feeding seat facing the spring assembly. The positioning arc groove fits with the outer cylindrical surface of the mounting seat, and the positioning guide groove is used to guide the protrusion on the pressure cover when the spring assembly moves in the vertical direction.

[0025] Furthermore, the loading seat is provided with a loading trough and a feeding trough, the feeding trough being horizontally arranged through the base and communicating with the loading trough;

[0026] The feeding plane of the feeding groove is flush with the bottom surface of the slot of the connecting shaft. The second driving member is located on the other side of the feeding seat away from the base, and is used to push the retaining spring in the feeding groove through the feeding groove and into the slot.

[0027] Furthermore, the second driving component includes a push plate, a rack, a gear shaft, and a drive motor;

[0028] The push plate has an arc-shaped push surface at one end near the retaining spring. The rack is fixed on the push plate. The drive motor is connected to the gear shaft through a coupling. The rack meshes with the gear shaft.

[0029] The beneficial effects of the present invention are as follows: The present invention achieves automated operation by setting up a pressing component and a feeding component, avoiding the risks of manual operation, effectively shortening the assembly time, improving production efficiency, and ensuring the accuracy and consistency of assembly by using sensors to precisely control the first driving component and the second driving component, thereby reducing human error. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a structural view and a partial enlarged view of the spring assembly pre-installed with the spring pressing tool in an embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram and a partial enlarged view of the spring pressing tool in the pressure holding stage in an embodiment of the present invention;

[0033] Figure 3 This is a cross-sectional view of the spring pressing tool in the pressure holding stage in an embodiment of the present invention;

[0034] Figure 4 This is a schematic diagram showing the positions of the card slot and the feeding slot in an embodiment of the present invention;

[0035] Figure 5 This is a structural view of the loading seat in an embodiment of the present invention;

[0036] Figure 6 This is a structural view of the crimping sleeve in an embodiment of the present invention;

[0037] Figure 7 This is a structural view of the second driving component in an embodiment of the present invention.

[0038] Reference numerals: 01, mounting base; 02, bracket; 021, slot; 03, spring assembly; 04, snap ring; 1, base; 2, press-fit assembly; 21, press-fit sleeve; 211, connecting section; 212, force-applying section; 212a, abutment block; 212b, front groove; 212c, rear groove; 212d, stepped groove; 22, first driving component; 3, feeding assembly; 31, feeding seat; 311, positioning arc groove; 312, positioning guide groove; 313, feeding groove; 314, feeding groove; 32, second driving component; 321, push plate; 322, rack; 323, gear shaft; 324, drive motor; 33, fixed base; 4, first sensor; 5, second sensor. Detailed Implementation

[0039] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0040] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0042] like Figures 1 to 7 The spring clamping fixture shown for the rearview mirror hinge shaft includes:

[0043] The base 1 has a first positioning surface for placing the rearview mirror bracket 02 and a second positioning surface for placing the rearview mirror mounting base 01.

[0044] The press assembly 2 is positioned above the base 1 and includes a press sleeve 21 and a first drive member 22, which is used to axially compress the spring assembly 03 to expose the groove 021 on the connecting shaft.

[0045] The feeding assembly 3 is disposed on one side of the base 1, including a feeding seat 31 and a second driving member 32 for horizontally pushing the retaining spring 04 in the feeding seat 31 into the slot 021;

[0046] Among them, a first sensor 4 and a second sensor 5 are set at the same horizontal height inside the crimping sleeve 21. The first sensor 4 is used to detect the distance to the end face of the connecting shaft to obtain the first distance, and the second sensor 5 is used to detect the distance to the end face of the spring assembly 03 to obtain the second distance.

[0047] By comparing the first distance and the second distance, the driving distance of the first driving member 22 on the spring assembly 03 is controlled, and when the difference between the two distances reaches a preset threshold, the second driving member 32 is activated.

[0048] In a preferred embodiment of the present invention, the rearview mirror bracket 02 and the rearview mirror mounting base 01 are first placed on the first positioning surface and the second positioning surface of the base 1, respectively, to ensure accurate assembly. The first driving component 22 is activated, driving the pressing sleeve 21 to axially compress the spring assembly 03. Simultaneously, the first sensor 4 and the second sensor 5 begin operation. The first sensor 4 acquires a first distance from the end face of the connecting shaft, and the second sensor 5 acquires a second distance from the end face of the spring assembly 03. During the compression of the spring assembly 03, the second sensor 5 moves synchronously with the spring assembly 03, i.e., the second distance is constant, while the connecting shaft remains fixed, and the pressing sleeve 21 moves relative to the connecting shaft, i.e., the first distance is variable. Initially, the first distance is greater than the second distance, and the end face of the spring assembly 03 is higher than the end face of the connecting shaft. As the first driving component 22 compresses the spring assembly 03 downwards, when the first distance equals the second distance, the end face of the connecting shaft and the end face of the spring assembly 03 are on the same horizontal plane. With continued compression of the spring assembly 03, the first distance gradually decreases and becomes less than the second distance. By comparing the difference between the two distances, it is determined whether the difference reaches the set threshold. When the distance difference reaches the set threshold, the slot 021 on the connecting shaft is exposed, the second drive component 32 is activated, and the snap ring 04 is horizontally pushed into the slot 021 of the connecting shaft to complete the assembly. The pressing sleeve 21 is reset, the spring assembly 03 is released, and the entire assembly process is completed.

[0049] The present invention achieves automated operation by setting up the pressing component 2 and the feeding component 3, avoiding the risks of manual operation, effectively shortening the assembly time, improving production efficiency, and ensuring the accuracy and consistency of assembly by using sensors to precisely control the first driving component 22 and the second driving component 32, thereby reducing human error.

[0050] In this invention, positioning grooves are provided on both the first and second positioning surfaces. The positioning grooves guide the rearview mirror bracket 02 and the mounting base 01 to be placed in a specific direction, avoiding offset and ensuring that the bracket 02 and the mounting base 01 are placed accurately.

[0051] In the preferred solution, such as Figure 3 and Figure 6 As shown, the crimping sleeve 21 is divided into a connecting section 211 and a force-applying section 212 along the axial direction. The connecting section 211 is a solid structure, and the force-applying section 212 is a hollow structure. Two abutting blocks 212a are symmetrically arranged at the bottom of the force-applying section 212, and the distance between the two abutting blocks 212a is greater than the width of the retaining spring 04.

[0052] Specifically, the connecting section 211 is a solid design, capable of withstanding the driving force of the first driving member 22, ensuring that the crimping sleeve 21 will not deform or break during the crimping process. The two symmetrical arc-shaped abutment blocks 212a can evenly transmit pressure to the end face of the spring assembly 03, avoiding deformation or displacement of the spring assembly 03 caused by single-point force application. Sufficient space is left between the two abutment blocks 212a to ensure that the retaining spring 04 can smoothly pass through the space between the two abutment blocks 212a during assembly, preventing collision or jamming between the retaining spring 04 and the abutment blocks 212a.

[0053] Based on the above embodiment, a front groove 212b and a rear groove 212c are formed between the two abutting blocks 212a; the front groove 212b is provided on the side facing the feeding component 3, and a stepped groove 212d is provided at the rear groove 212c.

[0054] The front groove 212b provides passage space for the retaining spring 04. During the assembly of the retaining spring 04, the rear groove 212c provides space for the tail of the retaining spring 04, ensuring that the retaining spring 04 can be smoothly assembled into place. The stepped groove 212d provided at the rear groove 212c provides additional clearance space for the assembly of the retaining spring 04 when the spring assembly 03 is compressed. In addition, the groove depth of the front groove 212b is greater than that of the rear groove 212c, ensuring that the retaining spring 04 has sufficient passage space during assembly, and minimizing the weakening of the structural strength of the abutment block 212a while ensuring the assembly of the retaining spring 04, thus ensuring the rigidity and stability of the pressing sleeve 21.

[0055] During the compression of the spring assembly 03 by the crimping sleeve 21, the length of the force-applying section 212 is greater than the distance from the slot 021 to the end face of the connecting shaft. The end of the connecting shaft can be fully inserted into the hollow cavity of the force-applying section 212, ensuring that the spring assembly 03 is compressed to a sufficient position, thereby fully exposing the slot 021 and providing sufficient space for the assembly of the snap ring 04.

[0056] Preferably, the crimping sleeve 21 is made of high-strength alloy steel. This extends the service life of the crimping sleeve 21 and the first driving component 22, reducing maintenance costs. Furthermore, the inner wall and outer surface of the crimping sleeve 21 are provided with a wear-resistant coating. This wear-resistant coating may be a ceramic coating or a hard alloy coating.

[0057] In this invention, when the spring assembly 03 is driven axially by the first driving member 22, it sequentially performs the pre-compression stage, the main compression stage, and the pressure holding stage.

[0058] During the pre-pressing stage, the drive pressing sleeve 21 contacts the spring assembly 03, and the first sensor 4 and the second sensor 5 confirm accurate alignment to avoid assembly failure due to initial position deviation.

[0059] During the main compression stage, the driving compression sleeve 21 compresses the spring assembly 03. The first stroke segment is when the spring assembly 03 is compressed to be flush with the end face of the connecting shaft, and the second stroke segment is when it is compressed below the slot 021. The conveying speed of the first stroke segment is greater than the moving speed of the second stroke segment. This rapid initial compression improves efficiency and ensures that the spring assembly 03 is accurately compressed to the target position, avoiding over-compression or under-compression. By adjusting the speed, it is ensured that the spring assembly 03 is compressed until the slot 021 is fully exposed, providing precise space for the assembly of the retaining spring 04.

[0060] During the pressure holding phase, the spring assembly 03 remains compressed in the second stroke segment until the retaining spring 04 is assembled. By maintaining the compressed state, stable conditions are provided for the smooth assembly of the retaining spring 04, reducing the possibility of assembly failure.

[0061] By controlling the press-fitting process in stages, combined with sensor monitoring and speed adjustment, efficient, accurate and stable press-fitting of spring assembly 03 and assembly of snap ring 04 were achieved.

[0062] In this embodiment of the invention, the feeding assembly 3 further includes a fixed seat 33, and the feeding seat 31 is disposed above the fixed seat 33 and slides horizontally relative to the fixed seat 33; a positioning arc groove 311 and a positioning guide groove 312 are provided on the side wall of the feeding seat 31 facing the spring assembly 03. The positioning arc groove 311 fits against the outer cylindrical surface of the mounting seat 01, and the positioning guide groove 312 is used to guide the protrusion on the pressure cover when the spring assembly 03 moves in the vertical direction.

[0063] By sliding the feeding seat 31, interference is avoided during the assembly of the mounting seat 01 and the bracket 02, thus improving assembly efficiency. The positioning arc groove 311 and the positioning guide groove 312 accurately position the installation position of the spring assembly 03, while ensuring the positional accuracy of the retaining spring 04 when it is fed in.

[0064] In a preferred embodiment of the present invention, the loading base 31 is provided with a loading groove 313 and a feeding groove 314. The feeding groove 314 is horizontally arranged through the base 1 and communicates with the loading groove 313, forming a conveying channel for the retaining spring 04, ensuring that the retaining spring 04 can be smoothly moved from the storage position to the assembly position.

[0065] The feeding plane of the feeding groove 314 is flush with the bottom surface of the slot 021 of the connecting shaft, ensuring accurate alignment of the retaining spring 04 with the slot 021 during conveying and avoiding assembly deviations. The second drive unit 32 is located on the other side of the loading seat 31 away from the base 1, and is used to push the retaining spring 04 in the loading groove 313 through the feeding groove 314 and into the slot 021. The automated driving of the second drive unit 32 reduces manual operation, lowers the assembly error rate, and improves assembly efficiency.

[0066] In this invention, the second driving component 32 includes a push plate 321, a rack 322, a gear shaft 323, and a drive motor 324. The push plate 321 has an arc-shaped pushing surface at one end near the retaining ring 04. The rack 322 is fixed to the push plate 321. The drive motor 324 is connected to the gear shaft 323 via a coupling, and the rack 322 meshes with the gear shaft 323. Power is provided by the drive motor 324, and the gear shaft 323 drives the rack 322 and the push plate 321 to move, pushing the retaining ring 04 into the retaining groove 021. It should be noted that the sum of the thicknesses of the push plate 321 and the rack 322 is less than the height of the feeding groove 314. During the feeding process of the push plate 321, the rack 322 can smoothly pass through the feeding groove 314. Power is provided by the drive motor 324, and the push plate 321 is moved via the gear shaft 323 and the rack 322, achieving automated pushing of the retaining ring 04 and reducing manual operation. The drive motor 324 is a servo motor or a stepper motor, which can precisely control the rotation speed and angle of the gear shaft 323, thereby controlling the moving speed and stroke of the push plate 321 and ensuring the accuracy and consistency of the snap ring 04 being pushed.

[0067] Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to this invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A spring pressing tool for a rearview mirror hinge shaft, characterized in that, include: The base has a first positioning surface for placing a rearview mirror bracket and a second positioning surface for placing a rearview mirror mounting base; A press-fit assembly, disposed above the base, includes a press-fit sleeve and a first drive member, used to axially compress the spring assembly to expose the groove on the connecting shaft; The feeding assembly is disposed on one side of the base and includes a feeding seat and a second driving member for horizontally pushing the retaining spring in the feeding seat into the slot; A first sensor and a second sensor are installed at the same horizontal height inside the crimping sleeve. The first sensor is used to detect the distance to the end face of the connecting shaft to obtain a first distance, and the second sensor is used to detect the distance to the end face of the spring assembly to obtain a second distance. By comparing the first distance and the second distance, the driving distance of the first driving component to the spring assembly is controlled, and when the difference between the two distances reaches a preset threshold, the second driving component is activated.

2. The spring pressing fixture for the rearview mirror hinge shaft according to claim 1, characterized in that, Positioning grooves are provided on both the first positioning surface and the second positioning surface.

3. The spring pressing fixture for the rearview mirror hinge shaft according to claim 1, characterized in that, The crimping sleeve is divided into a connecting section and a force-applying section along the axial direction. The connecting section is a solid structure, and the force-applying section is a hollow structure. Two abutment blocks are symmetrically arranged at the bottom of the force-applying section, and the distance between the two abutment blocks is greater than the width of the retaining spring.

4. The spring pressing fixture for the rearview mirror hinge shaft according to claim 3, characterized in that, A front groove and a rear groove are formed between the two abutting blocks; The front groove is positioned facing the feeding assembly, and a stepped groove is provided at the rear groove.

5. The spring pressing fixture for the rearview mirror hinge shaft according to claim 3, characterized in that, The length of the force-applying section is greater than the distance from the slot to the end face of the connecting shaft.

6. The spring pressing fixture for the rearview mirror hinge shaft according to claim 1, characterized in that, The crimping sleeve is made of high-strength alloy steel.

7. The spring pressing fixture for the rearview mirror hinge shaft according to claim 1, characterized in that, When the spring assembly is driven axially by the first driving member, it sequentially performs a pre-compression stage, a main compression stage, and a pressure holding stage. During the pre-compression stage, the crimping sleeve is driven to contact the spring assembly; During the main pressure stage, the pressing sleeve is driven to compress the spring assembly. The spring assembly is compressed to the level of the end face of the connecting shaft, which is the first stroke segment, and compressed to the level of the slot, which is the second stroke segment. The conveying speed of the first stroke segment is greater than the moving speed of the second stroke segment. During the pressure holding phase, the spring assembly remains in a compressed state in the second stroke segment until the retaining spring is fully assembled.

8. The spring pressing fixture for the rearview mirror hinge shaft according to claim 1, characterized in that, The feeding assembly also includes a fixed base, which is disposed above the fixed base and slides horizontally relative to the fixed base; A positioning arc groove and a positioning guide groove are provided on the side wall of the feeding seat facing the spring assembly. The positioning arc groove fits with the outer cylindrical surface of the mounting seat, and the positioning guide groove is used to guide the protrusion on the pressure cover when the spring assembly moves in the vertical direction.

9. The spring pressing fixture for the rearview mirror hinge shaft according to claim 1, characterized in that, The loading base is provided with a loading trough and a feeding trough. The feeding trough is horizontally arranged through the base and communicates with the loading trough. The feeding plane of the feeding groove is flush with the bottom surface of the slot of the connecting shaft. The second driving member is located on the other side of the feeding seat away from the base, and is used to push the retaining spring in the feeding groove through the feeding groove and into the slot.

10. The spring pressing fixture for the rearview mirror hinge shaft according to claim 1, characterized in that, The second driving component includes a push plate, a rack, a gear shaft, and a drive motor; The push plate has an arc-shaped push surface at one end near the retaining spring. The rack is fixed on the push plate. The drive motor is connected to the gear shaft through a coupling. The rack meshes with the gear shaft.

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