Spring crimping tool for rearview mirror hinge shaft

Abstract

The invention relates to the technical field of rearview mirror assembly, in particular to a spring pressing tool for a rearview mirror hinge shaft, which comprises a base, a pressing assembly and a feeding assembly, the pressing assembly comprises a pressing sleeve and a first driving part, and is used for axially compressing a spring assembly to expose a clamping groove in a connecting shaft; the feeding assembly comprises a feeding base and a second driving part used for horizontally pushing the clamping spring pieces in the feeding base into the clamping grooves. A first sensor and a 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 part to the spring assembly is controlled, when the distance difference value of the first distance and the second distance reaches a preset threshold value, starting of the second driving part is controlled, automatic operation is achieved, the risk of manual operation is avoided, the assembling time is effectively shortened, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of rearview mirror assembly, and in particular to a spring crimping tool for a rearview mirror hinge shaft. Background Art

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

[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, and an annular cavity is formed between the positioning shaft and the sleeve. During assembly, the spring assembly needs to be inserted into the annular cavity first, and by applying downward pressure on the spring assembly, the spring is compressed for a certain distance, and the groove on the connecting shaft is higher than the top surface of the spring assembly. By installing the retaining spring sheet into the retaining spring sheet, the spring assembly is axially limited on the positioning shaft through the retaining spring sheet.

[0004] However, the current traditional method is to manually use tools to press and install the spring assembly and the retaining spring piece. This operation method is time-consuming, labor-intensive, and inefficient. In addition, due to the reaction force of the spring, the retaining spring piece may accidentally injure 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 crimping tool for a rearview mirror hinge shaft, which effectively solves the problems in the background technology.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is: a spring crimping tool for a rearview mirror hinge shaft, comprising: The base has a first positioning surface for placing the rearview mirror bracket and a second positioning surface for placing the rearview mirror mounting seat; A press-fit assembly, arranged above the base, comprises a press-fit sleeve and a first driving member, and is used for axially compressing the spring assembly to expose the slot on the connecting shaft; A feeding assembly is arranged on one side of the base, and includes a feeding seat and a second driving member for horizontally pushing a clip spring in the feeding seat into a card slot; Wherein, a first sensor and a second sensor are arranged at the same level in the crimping sleeve, the first sensor is used to detect the distance between the end faces of the connecting shaft to obtain a first distance, and the second sensor is used to detect the distance between the end faces 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 member on the spring assembly is controlled, and when the difference between the distances reaches a preset threshold, the start of the second driving member is controlled.

[0007] Furthermore, positioning grooves are provided on both the first positioning surface and the second positioning surface.

[0008] 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; 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 clamping spring sheet.

[0009] Furthermore, a front groove and a rear groove are formed between the two abutment blocks; The front groove is arranged on one side facing the feeding assembly, and a step groove is arranged at the rear groove.

[0010] Furthermore, the length of the force-applying section is greater than the distance from the clamping groove to the end face of the connecting shaft.

[0011] Furthermore, the crimping sleeve is made of high-strength alloy steel.

[0012] 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-maintaining stage; In the pre-compression stage, the crimping sleeve is driven to contact the spring assembly; In the main pressure stage, the crimping sleeve is driven to compress the spring assembly. When the spring assembly is compressed to be flush with the end surface of the connecting shaft, it is the first stroke section, and when it is compressed to be lower than the slot, it is the second stroke section. The moving speed of the first stroke section is greater than the moving speed of the second stroke section. During the pressure-maintaining stage, the spring assembly is kept in a compressed state in the second stroke section until the spring clip is assembled.

[0013] Furthermore, the loading assembly further comprises a fixed seat, the loading seat is arranged above the fixed seat and slides in a horizontal direction relative to the fixed seat; A positioning arc groove and a positioning guide groove are provided on a side wall of the loading seat facing the spring assembly. The positioning arc groove fits 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.

[0014] Furthermore, a loading trough and a feeding trough are provided in the loading seat, and the feeding trough is horizontally arranged through the base and communicated with the loading trough; The feeding plane of the feeding trough is arranged flush with the bottom surface of the card slot of the connecting shaft, and the second driving member is arranged on the other side of the loading seat away from the base, for pushing the retaining spring in the loading trough through the feeding trough to the card slot.

[0015] Further, the second driving member includes a push plate, a rack, a gear shaft and a driving motor; An arc-shaped push surface is provided at one end of the push plate close to the clamping spring sheet, the rack is fixed on the push plate, the driving motor is connected to the gear shaft through a coupling, and the rack is meshed with the gear shaft.

[0016] The beneficial effects of the present invention are as follows: the present invention realizes automated operation through the setting of the press-fitting component and the feeding component, avoids the risk of manual operation, effectively shortens the assembly time, improves production efficiency, and accurately controls the first driving member and the second driving member through the sensor to ensure the accuracy and consistency of the assembly and reduce human errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A structural view and a partial enlarged view of a spring crimping tool pre-installed with a spring assembly in an embodiment of the present invention; Figure 2 It is a structural schematic diagram and a partial enlarged diagram of the spring crimping tooling in the pressure-maintaining stage in an embodiment of the present invention; Figure 3 It is a cross-sectional view of the spring crimping tooling in the embodiment of the present invention in the pressure-maintaining stage; Figure 4 It is a schematic diagram of the positions of the card slot and the feeding slot in the embodiment of the present invention; Figure 5 This is a structural view of a loading base in an embodiment of the present invention; Figure 6 A structural view of a crimping sleeve in an embodiment of the present invention; Figure 7 2 is a structural view of the second driving member in an embodiment of the present invention.

[0019] : 01, mounting seat; 02, bracket; 021, slot; 03, spring assembly; 04, spring plate; 1, base; 2, press-fit assembly; 21, crimping sleeve; 211, connecting section; 212, force-applying section; 212a, abutment block; 212b, front slot; 212c, rear slot; 212d, step slot; 22, first driving member; 3, loading assembly; 31, loading seat; 311, positioning arc slot; 312, positioning guide slot; 313, loading slot; 314, feeding slot; 32, second driving member; 321, push plate; 322, rack; 323, gear shaft; 324, driving motor; 33, fixing seat; 4, first sensor; 5, second sensor. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0023] like Figures 1 to 7 The spring crimping tool shown for the rearview mirror hinge shaft includes: 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 seat 01; The press-fit assembly 2 is arranged above the base 1, and includes a press-fit sleeve 21 and a first driving member 22, and is used to axially compress the spring assembly 03 to expose the slot 021 on the connecting shaft; The loading assembly 3 is arranged on one side of the base 1, and includes a loading seat 31 and a second driving member 32 for horizontally pushing the clip 04 in the loading seat 31 to the clip slot 021; Wherein, a first sensor 4 and a second sensor 5 are arranged at the same level in the crimping sleeve 21, the first sensor 4 is used to detect the distance between the end faces of the connecting shaft to obtain a first distance, and the second sensor 5 is used to detect the distance between the end faces of the spring assembly 03 to obtain a second distance; 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 distances reaches a preset threshold, the start of the second driving member 32 is controlled.

[0024] In the preferred implementation process of the present invention, firstly, the rearview mirror bracket 02 and the rearview mirror mounting seat 01 are placed on the first positioning surface and the second positioning surface of the base 1 respectively to ensure the accurate assembly position; the first driving member 22 is started to drive the crimping sleeve 21 to axially compress the spring assembly 03. At the same time, the first sensor 4 and the second sensor 5 start to work, the first sensor 4 obtains the first distance of the end face of the connecting shaft, and the second sensor 5 obtains the second distance of the end face of the spring assembly 03. During the compression process of the spring assembly 03, the second sensor 5 and the spring assembly 03 are in a synchronous moving state, that is, the second distance is a fixed value, while the connecting shaft is in a fixed state, and the crimping sleeve 21 moves relative to the connecting shaft, that is, the first distance is a variable value. 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; the spring assembly 03 is compressed downward by the first driving member 22, and when the first distance is equal to the second distance, the end face of the connecting shaft and the end face of the spring assembly 03 are in the same horizontal plane; the spring assembly 03 is continuously compressed, and the first distance gradually decreases and is less than the second distance. By comparing the difference in distance between the two, 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 driving member 32 is started, and the spring sheet 04 is pushed horizontally into the slot 021 of the connecting shaft to complete the assembly; the crimping sleeve 21 is reset to release the spring assembly 03 to complete the entire assembly process.

[0025] The present invention realizes automated operation by setting up the press-fitting component 2 and the feeding component 3, avoids the risk of manual operation, effectively shortens the assembly time, improves production efficiency, and accurately controls the first driving member 22 and the second driving member 32 through sensors to ensure the accuracy and consistency of assembly and reduce human errors.

[0026] In the present invention, positioning grooves are provided on both the first positioning surface and the second positioning surface. The positioning grooves guide the rearview mirror bracket 02 and the mounting seat 01 to be placed in a specific direction to avoid deviation and ensure that the bracket 02 and the mounting seat 01 are placed in the correct position.

[0027] In a preferred embodiment, Figure 3 and Figure 6As shown, the crimping sleeve 21 is axially divided into a connecting section 211 and a force-applying section 212 , the connecting section 211 is a solid structure, and the force-applying section 212 is a hollow structure; two abutment blocks 212 a are symmetrically arranged at the bottom of the force-applying section 212 , and the distance between the two abutment blocks 212 a is greater than the width of the retaining spring 04 .

[0028] Specifically, the connecting section 211 is of solid design and can withstand the driving force of the first driving member 22, ensuring that the crimping sleeve 21 will not be deformed or broken during the crimping process. The two symmetrical arc-shaped abutment blocks 212a can evenly transfer pressure to the end face of the spring assembly 03 to avoid deformation or displacement of the spring assembly 03 caused by single-point force, and there is enough space between the two abutment blocks 212a to ensure that the spring sheet 04 can smoothly pass through the space between the two abutment blocks 212a during the assembly process, avoiding collision or jamming between the spring sheet 04 and the abutment blocks 212a.

[0029] 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 arranged on a side facing the feeding assembly 3, and a step groove 212d is provided at the rear groove 212c.

[0030] The front groove 212b provides a space for the spring sheet 04 to pass through. During the assembly process of the spring sheet 04, the rear groove 212c provides space for the tail of the spring sheet 04 to ensure that the spring sheet 04 can be smoothly assembled in place, and the step groove 212d provided at the rear groove 212c provides additional escape space for the assembly of the spring sheet 04 when the spring assembly 03 is compressed. In addition, the groove depth of the front groove 212b is greater than the groove depth of the rear groove 212c, ensuring that the spring sheet 04 has enough space to pass through during the assembly process, and under the premise of ensuring the assembly of the spring sheet 04, the weakening of the structural strength of the abutment block 212a is minimized to ensure the rigidity and stability of the crimping sleeve 21.

[0031] When the crimping sleeve 21 compresses the spring assembly 03, 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, and the end of the connecting shaft can completely enter the hollow cavity of the force-applying section 212, ensuring that the spring assembly 03 is compressed to a sufficient position, so that the slot 021 is completely exposed, providing sufficient space for the assembly of the retaining spring sheet 04.

[0032] Preferably, the crimping sleeve 21 is made of high-strength alloy steel. The service life of the crimping sleeve 21 and the first driving member 22 is extended, and the maintenance cost is reduced. In addition, the inner wall and outer surface of the crimping sleeve 21 are provided with a wear-resistant coating. The wear-resistant coating is a ceramic coating or a hard alloy coating.

[0033] In the present invention, when the spring assembly 03 is driven axially by the first driving member 22, the pre-compression stage, the main compression stage and the pressure-maintaining stage are sequentially performed; In the pre-pressing stage, the crimping sleeve 21 is driven to contact the spring assembly 03, and the first sensor 4 and the second sensor 5 are used to confirm that the alignment is accurate, thereby avoiding assembly failure caused by initial position deviation.

[0034] In the main compression stage, the drive crimping sleeve 21 compresses the spring assembly 03. When the spring assembly 03 is compressed to be flush with the end face of the connecting shaft, it is the first stroke section, and when it is compressed to be lower than the slot 021, it is the second stroke section. The moving speed of the first stroke section is greater than the moving speed of the second stroke section; the initial compression is completed quickly to improve efficiency, ensure that the spring assembly 03 is accurately compressed to the target position, and avoid overpressure or underpressure. Through speed adjustment, ensure that the spring assembly 03 is compressed until the slot 021 is completely exposed, and provide accurate space for the assembly of the spring plate 04.

[0035] In the pressure-holding stage, the spring assembly 03 is kept in the compressed state in the second stroke section until the assembly of the clip spring 04 is completed. By keeping the compressed state, stable conditions are provided for the smooth assembly of the clip spring 04, reducing the possibility of assembly failure.

[0036] By controlling the press-fitting process in stages, combined with sensor monitoring and speed regulation, efficient, precise and stable press-fitting of the spring assembly 03 and assembly of the clip spring 04 are achieved.

[0037] In the embodiment of the present invention, the loading assembly 3 also includes a fixed seat 33, the loading seat 31 is arranged above the fixed seat 33, and slides in the horizontal direction 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 loading seat 31 facing the spring assembly 03, the positioning arc groove 311 is in contact with 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.

[0038] By sliding the loading seat 31, interference between the mounting seat 01 and the bracket 02 can be avoided, thereby improving assembly efficiency. By setting the positioning arc groove 311 and the positioning guide groove 312, the installation position of the spring assembly 03 can be accurately positioned, while ensuring the position accuracy of the spring clip 04 when it is fed in.

[0039] In a preferred embodiment of the present invention, a loading trough 313 and a feeding trough 314 are provided in the loading seat 31. The feeding trough 314 is horizontally arranged to penetrate toward the base 1 and is connected with the loading trough 313, forming a conveying channel for the spring sheet 04 to ensure that the spring sheet 04 can be smoothly moved from the storage position to the assembly position.

[0040] The feeding plane of the feeding trough 314 is flush with the bottom surface of the slot 021 of the connecting shaft, ensuring that the spring piece 04 is accurately aligned with the slot 021 during the conveying process to avoid assembly deviation. The second driving member 32 is arranged on the other side of the loading seat 31 away from the base 1, and is used to push the spring piece 04 in the loading trough 313 through the feeding trough 314 to the slot 021. Through the automatic pushing of the second driving member 32, manual operation is reduced, the assembly error rate is reduced, and the assembly efficiency is improved.

[0041] In the present invention, the second driving member 32 includes a push plate 321, a rack 322, a gear shaft 323 and a driving motor 324. The push plate 321 is provided with an arc-shaped push surface at one end close to the clip spring piece 04. The rack 322 is fixed on the push plate 321. The driving motor 324 is connected to the gear shaft 323 through a coupling. The rack 322 meshes with the gear shaft 323. The driving motor 324 provides power, and the gear shaft 323 drives the rack 322 and the push plate 321 to move, and push the clip spring piece 04 to the card slot 021. It should be noted that the sum of the thickness of the push plate 321 and the rack 322 is less than the height of the feeding slot 314. During the feeding process of the push plate 321, the rack 322 can smoothly pass through the feeding slot 314. The driving motor 324 provides power, and the gear shaft 323 and the rack 322 drive the push plate 321 to move, so as to realize the automatic pushing of the clip spring piece 04 and reduce manual operation. The driving motor 324 adopts a servo motor or a stepping motor, which can accurately control the rotation speed and angle of the gear shaft 323, thereby controlling the moving speed and stroke of the push plate 321, ensuring the accuracy and consistency of pushing the clamping spring piece 04.

[0042] Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A spring crimping tool for a rearview mirror hinge shaft, characterized in that: include: The base has a first positioning surface for placing the rearview mirror bracket and a second positioning surface for placing the rearview mirror mounting seat; A press-fit assembly, arranged above the base, comprises a press-fit sleeve and a first driving member, and is used for axially compressing the spring assembly to expose the slot on the connecting shaft; A feeding assembly is arranged on one side of the base, and includes a feeding seat and a second driving member for horizontally pushing a clip spring in the feeding seat into a card slot; Wherein, a first sensor and a second sensor are arranged at the same level in the crimping sleeve, the first sensor is used to detect the distance between the end faces of the connecting shaft to obtain a first distance, and the second sensor is used to detect the distance between the end faces 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 member on the spring assembly is controlled, and when the difference between the distances reaches a preset threshold, the start of the second driving member is controlled.

2. The spring crimping tool 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 crimping tool 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 clamping spring sheet.

4. The spring crimping tool 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 abutment blocks; The front groove is arranged on one side facing the feeding assembly, and a step groove is arranged at the rear groove.

5. The spring crimping tool 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 clamping groove to the end surface of the connecting shaft.

6. The spring crimping tool 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 crimping tool for the rearview mirror hinge shaft according to claim 1, characterized in that: When the spring assembly is driven by the first driving member in the axial direction, it sequentially performs a pre-compression stage, a main compression stage and a pressure-maintaining stage; In the pre-compression stage, the crimping sleeve is driven to contact the spring assembly; In the main pressure stage, the crimping sleeve is driven to compress the spring assembly. When the spring assembly is compressed to be flush with the end surface of the connecting shaft, it is the first stroke section, and when it is compressed to be lower than the slot, it is the second stroke section. The moving speed of the first stroke section is greater than the moving speed of the second stroke section. During the pressure-maintaining stage, the spring assembly is kept in a compressed state in the second stroke section until the spring clip is assembled.

8. The spring crimping tool for the rearview mirror hinge shaft according to claim 1, characterized in that: The loading assembly further includes a fixed seat, the loading seat is arranged above the fixed seat and slides in a horizontal direction relative to the fixed seat; A positioning arc groove and a positioning guide groove are provided on a side wall of the loading seat facing the spring assembly. The positioning arc groove fits 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 crimping tool for the rearview mirror hinge shaft according to claim 1, characterized in that: The loading seat is provided with a loading trough and a feeding trough, and the feeding trough is horizontally arranged through the base and communicated with the loading trough; The feeding plane of the feeding trough is arranged flush with the bottom surface of the card slot of the connecting shaft, and the second driving member is arranged on the other side of the loading seat away from the base, for pushing the retaining spring in the loading trough through the feeding trough to the card slot.

10. The spring crimping tool for the rearview mirror hinge shaft according to claim 1, characterized in that: The second driving member includes a push plate, a rack, a gear shaft and a driving motor; An arc-shaped push surface is provided at one end of the push plate close to the clamping spring sheet, the rack is fixed on the push plate, the driving motor is connected to the gear shaft through a coupling, and the rack is meshed with the gear shaft.

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