Automatic locking tool for ball head screw

Abstract

The utility model discloses a ball head screw automatic locking frock, including base, be provided with assembly platform on the base, the top of assembly platform is provided with the support piece for supporting the lamp shell, the bottom fixed embedding of ball head seat with mounting hole of lamp shell, the top surface fixed of base has servo motor, the motor shaft of servo motor is installed with the installation mechanism corresponding with ball head seat, the ball head screw is placed on the installation mechanism, the installation mechanism includes guide pillar, the guide pillar is fixed on the motor shaft outside of servo motor through the lock pin, the guide pillar is provided with the plug pin of vertical sliding, the utility model discloses through the spring of the plug pin and guide pillar between the installation mechanism is set, and the both ends of spring respectively resist the top of guide pillar and plug pin nail head, when servo motor drives ball head screw to rotate and lock, the spring can compress or rebound according to the assembly resistance in real time, thereby realizes the dynamic regulation of pressure in the assembly process, avoids that screw is overwound or assembly gap is too big.

Description

Technical Field

[0001] This utility model belongs to the technical field of automotive lighting auxiliary production, specifically relating to an automatic locking fixture for ball head screws. Background Technology

[0002] During the assembly of automotive lights, ball-head screws need to be precisely inserted into the ball head socket of the lamp housing. Traditional manual operation suffers from low positioning accuracy, low efficiency, and poor consistency. A search revealed that CN108213952B discloses a multi-functional pressing fixture for headlight housings, comprising an upper template and a lower template. The upper template is equipped with a support frame, an adjusting screw pressing mechanism, and a U-shaped clamp pressing mechanism. The support frame is equipped with an adjusting screw clamping rod and a connector clamping mechanism. The lower template is equipped with a lamp housing simulation block I, a lamp housing support frame, a ball-head screw mounting mechanism, and an adjusting screw clamping support rod. The lamp housing support frame is equipped with a lamp housing simulation block II and a lamp housing clamping mechanism.

[0003] The existing tooling technology has the following problems: The above tooling first fixes the lamp housing through a press-fitting mechanism, and then drives the ball head screw mounting post to rise through a cylinder. The ball head screw is installed by a motor controlling the rotation of the ball head screw mounting post. That is, the assembly mode of "rigid pressing + rigid lifting + rotation" is prone to causing the screw to be over-tightened or the assembly gap to be too large. Utility Model Content

[0004] The purpose of this utility model is to provide an automatic locking fixture for ball head screws, so as to solve the problem that the existing fixture technology mentioned in the background art is prone to over-tightening of screws or excessive assembly gaps.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an automatic ball head screw locking fixture, including a base, an assembly platform on the base, a support for supporting a lamp housing on the top of the assembly platform, a ball head seat with mounting holes fixedly embedded at the bottom of the lamp housing, a servo motor fixed on the top surface of the base, an mounting mechanism corresponding to the ball head seat mounted on the motor shaft of the servo motor, and a ball head screw placed on the mounting mechanism; The mounting mechanism includes a guide post, which is fixed to the outside of the motor shaft of the servo motor by a locking pin. The guide post is provided with a vertically sliding pin, and the ball head screw is engaged with the pin. The pin is elastically connected to the guide post by a spring.

[0006] Preferably, the guide post is sleeved on the outside of the motor shaft of the servo motor, and a pin hole for inserting a locking pin is provided on one side of the bottom of the guide post, and a waist-shaped groove for sliding and limiting the insertion of the pin is provided on the top of the guide post.

[0007] Preferably, the top surface of the insert is provided with an inner hexagonal groove, the bottom of the ball head screw is provided with an outer hexagonal groove that matches the inner hexagonal groove, and the bottom of the insert is provided with a through hole in the radial direction, and a limiting tube that is limited to the waist-shaped sliding groove is inserted into the through hole.

[0008] Preferably, the spring is sleeved outside the pin, and the two ends of the spring abut against the guide post and the head of the pin, respectively.

[0009] Preferably, the assembly table includes a platform, and a first support column is fixed at the bottom edge of the platform. The first support column is fixed to the base, and a through hole is provided on the platform for the guide column to extend out.

[0010] Preferably, the support includes a second support column, which is fixed to the platform, and the top of the second support column is fixed with an irregularly shaped bracket that matches the shape of the lamp housing edge.

[0011] Preferably, a control box electrically connected to the lamp housing is provided on one side of the base, and the base is provided with an on / off switch for controlling the servo motor through the control box.

[0012] Compared with the prior art, this utility model provides an automatic locking fixture for ball head screws, which has the following advantages: 1. This utility model incorporates a spring between the pin and the guide post in the installation mechanism. The two ends of the spring abut against the top of the guide post and the head of the pin, respectively. When the servo motor drives the ball head screw to rotate and lock, the spring can be compressed or rebounded in real time according to the assembly resistance, thereby realizing dynamic adjustment of pressure during the assembly process and avoiding over-tightening of the screw or excessive assembly gap. 2. This utility model achieves flexible assembly through springs, thereby improving adaptability and solving the problem that the existing ball head screw installation mechanism relies on the rigidity of the cylinder to drive the installation column upward, and the pressure is not adjustable, resulting in fluctuations in assembly accuracy. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of an automatic locking fixture for ball head screws proposed in this utility model; Figure 2 This is a schematic diagram of the assembly table structure proposed in this utility model; Figure 3 This is a schematic diagram of the ball head seat and ball head screw structure proposed in this utility model; Figure 4 This is a schematic diagram of the installation mechanism structure proposed in this utility model; Figure 5 This is a half-sectional view of the installation mechanism proposed in this utility model; In the diagram: 1. Base; 2. Assembly table; 21. Platform; 211. Through hole; 22. First support column; 3. Support component; 31. Second support column; 32. Irregular support; 4. Lamp housing; 41. Ball head seat; 411. Mounting hole; 5. Mounting mechanism; 51. Guide post; 511. Pin hole; 512. Waist-shaped slide; 52. Insert pin; 521. Internal hexagonal slot; 522. Through hole; 523. Limiting tube; 53. Spring; 6. On / off switch; 7. Control box; 8. Ball head screw; 81. External hexagonal screw; 9. Servo motor. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1 and Figure 2 This utility model provides a technical solution: an automatic ball head screw locking fixture, including a base 1, an assembly platform 2 on the base 1, a support member 3 for supporting a lamp housing 4 on the top of the assembly platform 2, a ball head seat 41 with mounting holes 411 fixedly embedded at the bottom of the lamp housing 4, a servo motor 9 fixed on the top surface of the base 1, an installation mechanism 5 corresponding to the ball head seat 41 mounted on the motor shaft of the servo motor 9, a ball head screw 8 placed on the installation mechanism 5, the installation mechanism 5 including a guide post 51, the guide post 51 being fixed to the outside of the motor shaft of the servo motor 9 by a locking pin, a vertically sliding pin 52 being provided on the guide post 51, the ball head screw 8 being engaged with the pin 52, the pin 52 being elastically connected to the guide post 51 by a spring 53, the spring 53 being sleeved between the pin 52 and the guide post 51 of the installation mechanism, the two ends of the spring respectively abutting the top of the guide post and the head of the pin. When the servo motor 9 drives the ball head screw 8 to rotate and lock, the spring can be compressed or rebounded in real time according to the assembly resistance.

[0016] Please see Figure 4 and Figure 5 The guide post 51 is sleeved on the outside of the motor shaft of the servo motor 9. A pin hole 511 for inserting a locking pin is provided on one side of the bottom of the guide post 51. A waist-shaped groove 512 for sliding and limiting the insertion pin 52 is radially provided on the top of the guide post 51. An internal hexagonal groove 521 is provided on the top surface of the insertion pin 52. Figure 3As shown, the bottom of the ball head screw 8 is provided with an external hexagon 81 that is adapted to the internal hexagonal groove 521. The bottom of the pin 52 is provided with a through hole 522 in the radial direction. A limiting tube 523 located in the waist-shaped sliding groove 512 is inserted into the through hole 522. This structure restricts the pin 52 to slide only along the axial direction of the guide post 51 (sliding stroke 0.8-1.2cm), avoiding the pin from shifting during rotation and causing screw misalignment. The spring 53 is sleeved on the outside of the pin 52. The two ends of the spring 53 abut against the guide post 51 and the head of the pin 52, respectively.

[0017] Furthermore, the assembly table 2 includes a platform 21, with a first support column 22 fixed at the bottom edge of the platform 21. The first support column 22 is fixed to the base 1. The platform 21 has through holes 211 for the guide column 51 to extend out. 3-4 sets of support members 3 are evenly distributed on the platform 21 of the assembly table 2 (adjusted according to the size of the lamp housing) to form "multi-point distributed support".

[0018] Furthermore, the support member 3 includes a second support column 31, which is fixed on the platform 21. The top of the second support column 31 is fixed with a non-circular support 32 that matches the shape of the side of the lamp housing 4. The top surface contour of the non-circular support 32 is perfectly matched with the shape of the side of the lamp housing 4 (such as the arc or stepped structure of the lamp housing edge).

[0019] Furthermore, a control box 7 electrically connected to the lamp housing 4 is provided on one side of the base 1. The base 1 is provided with an on / off switch 6 for controlling the servo motor 9 through the control box 7. The servo motor 9 can be started and stopped directly through the on / off switch 6 on the base. The control box 7 has a built-in torque monitoring unit that can provide real-time feedback on the screw tightening torque. When the torque exceeds the standard, the machine will automatically stop. The control box 7 can perform 3-second control or 10-second control to adapt to the torque of different screws. It also has the function of forward and reverse rotation of the motor for screw replacement.

[0020] The working principle and usage process of this utility model: With the large end of the ball head screw 8 facing down, the outer hexagonal part 81 of the ball head screw 8 is inserted into the inner hexagonal groove 521 of the insert 52. The lamp housing 4 is placed on the irregular support 32 at the top of each second support column 31. The pressing mechanism (please refer to the referenced documents in the background art, not shown in the figures of this application) moves downward to press the lamp housing 4. Then, the servo motor 9 starts to work and drives the guide column 51 to rotate through the motor shaft. Under the action of the limit tube 523, the guide column 51 synchronously drives the insert 52 to rotate, thereby driving the ball head screw 52 to rotate. When the ball head screw 8 rotates, the spring 53 is in its natural state at the beginning of assembly, providing initial preload to the ball head screw 8. As the screw is screwed into the mounting hole 411 of the ball head seat 41, the resistance gradually increases, and the spring 53 is compressed to buffer the axial force on the screw. When the screw reaches the preset locking torque, the elastic force of the spring 53 can offset part of the overload force, preventing damage to the screw threads or excessive force on the ball head seat 41, which could lead to breakage and deformation. This allows the ball head screw 8 to be rotated and locked onto the ball head seat 41 at the bottom of the lamp housing 4 through the mounting hole 411, thus completing the assembly.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic locking fixture for ball head screws, comprising a base (1), characterized in that: An assembly platform (2) is provided on the base (1). A support member (3) for supporting the lamp housing (4) is provided on the top of the assembly platform (2). A ball head seat (41) with a mounting hole (411) is fixedly embedded at the bottom of the lamp housing (4). A servo motor (9) is fixed on the top surface of the base (1). A mounting mechanism (5) corresponding to the ball head seat (41) is installed on the motor shaft of the servo motor (9). A ball head screw (8) is placed on the mounting mechanism (5). The mounting mechanism (5) includes a guide post (51), which is fixed to the outside of the motor shaft of the servo motor (9) by a locking pin. The guide post (51) is provided with a pin (52) that can slide vertically. The ball head screw (8) is engaged with the pin (52). The pin (52) is elastically connected to the guide post (51) by a spring (53).

2. The automatic locking fixture for ball head screws according to claim 1, characterized in that: The guide post (51) is sleeved on the outside of the motor shaft of the servo motor (9). A pin hole (511) for inserting the locking pin is provided on one side of the bottom of the guide post (51). A waist-shaped groove (512) for sliding and limiting the insertion pin (52) is provided on the top of the guide post (51).

3. The automatic locking fixture for ball head screws according to claim 2, characterized in that: The top surface of the insert (52) is provided with an inner hexagonal groove (521), and the bottom of the ball head screw (8) is provided with an outer hexagonal groove (81) that is compatible with the inner hexagonal groove (521). The bottom of the insert (52) is provided with a through hole (522) in the radial direction, and a limiting tube (523) that is limited to the waist-shaped slide groove (512) is inserted into the through hole (522).

4. The automatic locking fixture for ball head screws according to claim 3, characterized in that: The spring (53) is sleeved on the outside of the pin (52), and the two ends of the spring (53) abut against the guide post (51) and the head of the pin (52) respectively.

5. The automatic locking fixture for ball head screws according to claim 1, characterized in that: The assembly table (2) includes a platform (21), and a first support column (22) is fixed at the bottom edge of the platform (21). The first support column (22) is fixed on the base (1), and a through hole (211) is provided on the platform (21) for the guide column (51) to extend.

6. The automatic locking fixture for ball head screws according to claim 5, characterized in that: The support member (3) includes a second support column (31), which is fixed on the platform (21). The top of the second support column (31) is fixed with a special-shaped support (32) that matches the shape of the edge of the lamp housing (4).

7. The automatic locking fixture for ball head screws according to claim 1, characterized in that: The base (1) has a control box (7) electrically connected to the lamp housing (4) on one side, and the base (1) has an on / off switch (6) for controlling the servo motor (9) through the control box (7).

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