Traffic light shell screw hole positioning tool

Abstract

The utility model provides a traffic light shell screw hole positioning tool, which belongs to the technical field of punching, and comprises a workbench and a clamping positioning assembly arranged on the outer wall of the workbench, the clamping positioning assembly comprises a slide rail, a slide sleeve, a guide plate, a clamping cylinder, a clamping rod, a clamping groove, a mounting table and a driving assembly, the sliding rail is fixedly arranged at the corner of the top of the outer wall of the workbench, the sliding sleeve slidably sleeves the outer wall of the sliding rail, and the guide plate lifting bolt is fixedly arranged at an opening in the top of the outer wall of the sliding sleeve. The clamping air cylinder provides initial pre-tightening force, servo feedback control of the clamping motor is combined, deformation of the lamp shell can be compensated in real time, it is guaranteed that hole positions do not deviate in the clamping process, a closed-loop power transmission chain is formed through primary meshing of the driving gear and the rack and secondary meshing of the rack and the driven gear, accurate angle adjustment of the clamping rod is achieved, and the clamping efficiency is improved. And the clamping stability is guaranteed, and shaking in the punching process is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of drilling technology, specifically relating to a positioning fixture for screw holes in a traffic light housing. Background Technology

[0002] In the field of traffic light housing manufacturing, precise positioning of screw holes is a core technological step to ensure the sealing performance, structural strength, and installation compatibility of the light body. With the rapid development of intelligent transportation systems, the diversification of light housing specifications (such as multi-lens module integration and irregular structure design) and the surge in demand for mass production have exposed the following significant defects of traditional positioning tooling: High reliance on manual labor; existing tooling mostly uses manually adjustable bolts or simple stop blocks for positioning (positioning error ±1.5mm), requiring operators to repeatedly test and calibrate, with single-piece positioning taking as long as 5-8 minutes. According to statistics, sealing failures caused by hole misalignment account for 12%-18% (from the "Traffic Signal Equipment Manufacturing White Paper 2023"); Rigid clamping damage; traditional metal clamps directly contact the surface of the light housing, resulting in concentrated clamping force. Indentation of PC / acrylic materials is easily caused (damage rate ≥5%), especially when the ambient temperature changes (-20℃~60℃), the difference in thermal expansion further exacerbates the risk of hole misalignment. The static clamping design lacks a real-time deformation monitoring and compensation mechanism in existing equipment. Micro-deformation (typical value ±0.8mm) caused by external force or processing vibration of the lamp housing during clamping cannot be corrected, resulting in the deviation between the actual hole position and the theoretical coordinate after drilling exceeding the standard (>±0.5mm). The single drive mode is limited. Although the pure pneumatic clamp (pressure 0.6-1.0MPa) can clamp quickly, it is sensitive to pressure fluctuations (±0.1MPa fluctuation causes clamping force change of ±15%), which cannot meet the requirements of high-precision processing. The pure electric solution has a response delay (>2s), which is difficult to adapt to the cycle time of high-speed production lines. Utility Model Content

[0003] The purpose of this utility model is to provide a positioning fixture for the screw holes of a traffic light housing, which aims to solve the problems mentioned in the background art.

[0004] A positioning fixture for screw holes in a traffic light housing, comprising,

[0005] Workbench;

[0006] A clamping and positioning assembly is located on the outer wall of a workbench. The assembly includes a slide rail, a sliding sleeve, a guide plate, a clamping cylinder, a clamping rod, a clamping groove, a mounting platform, and a drive assembly. The slide rail is fixedly located at the top corner of the outer wall of the workbench. The sliding sleeve is slidably fitted onto the outer wall of the slide rail. The guide plate is fixedly located at the top opening of the sliding sleeve via a lifting bolt. The clamping cylinder is fixedly located on both sides of the top of the outer wall of the workbench via a bracket. The mounting platform is fixedly located on one side of the outer wall of the guide plate. The clamping groove is located on one side of the outer wall of the guide plate. The drive assembly is located on the outer wall of the mounting platform. The clamping rod is rotatably inserted into the outer wall of the mounting platform. The clamping rod and the clamping groove are matched. A roller is rotatably embedded in the groove at the top of the outer wall of the workbench.

[0007] Furthermore, the drive assembly includes a clamping motor, a drive gear, a rack, and a driven gear.

[0008] Furthermore, the clamping motor is fixedly installed at the bottom of the outer wall of the mounting platform, the driving gear is fixedly installed at the outer wall of the output end of the clamping motor, the driving gear is meshed with the rack, and the driven gear is fixedly installed at the outer wall of one end of the clamping rod.

[0009] Furthermore, the rack and the driven gear are meshed and connected.

[0010] Furthermore, a protective plate is fixedly installed on the top of the outer wall of the mounting platform.

[0011] Furthermore, the rack is slidably embedded in the groove on the inner wall of the protective plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] The clamping and positioning assembly, driven by a drive component, rotates the clamping rod. As the clamping cylinder drives the guide plates to approach each other, the clamping rod gradually clamps the traffic light housing. One end of the clamping rod is coated with a rubber layer. The guide plates provide lateral clamping of the traffic light housing, ensuring the accuracy of the screw hole drilling device on the outer wall of the workbench during descent. The clamping cylinder provides initial preload, and combined with the servo feedback control of the clamping motor, it can compensate for housing deformation in real time, ensuring that the hole position does not shift during clamping. Through the first-stage meshing of the drive gear and rack, and the second-stage meshing of the rack and driven gear, a closed-loop power transmission chain is formed, enabling precise angle adjustment of the clamping rod, ensuring clamping stability, and preventing shaking during drilling. Attached Figure Description

[0014] 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:

[0015] Figure 1 This is a perspective view of the present utility model;

[0016] Figure 2 This is a perspective view of the clamping rod of this utility model;

[0017] Figure 3 This is a perspective view of the guide plate of this utility model.

[0018] In the diagram: 1. Workbench; 2. Slide rail; 3. Sliding sleeve; 4. Guide plate; 5. Clamping cylinder; 6. Clamping motor; 7. Driving gear; 8. Rack; 9. Driven gear; 10. Clamping rod; 101. Roller; 401. Clamping groove; 402. Mounting platform; 403. Protective plate. Detailed Implementation

[0019] 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.

[0020] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Please see Figure 1-3The technical solution provided in this embodiment is as follows:

[0023] A positioning fixture for screw holes in a traffic light housing, comprising,

[0024] Workbench 1;

[0025] A clamping and positioning assembly is located on the outer wall of the workbench 1. The clamping and positioning assembly includes a slide rail 2, a sliding sleeve 3, a guide plate 4, a clamping cylinder 5, a clamping rod 10, a clamping groove 401, a mounting platform 402, and a drive assembly. The slide rail 2 is fixedly located at the top corner of the outer wall of the workbench 1. The sliding sleeve 3 is slidably fitted onto the outer wall of the slide rail 2. The guide plate 4 is fixedly located at the top opening of the outer wall of the sliding sleeve 3 with lifting bolts. The clamping cylinder 5 is fixedly located on both sides of the top of the outer wall of the workbench 1 via brackets. The mounting platform 402 is fixedly located on one side of the outer wall of the guide plate 4. The clamping groove 401 is opened on one side of the outer wall of the guide plate 4. The drive assembly is located on the outer wall of the mounting platform 402. The clamping rod 10 is rotatably inserted into the outer wall of the mounting platform 402. The clamping rod 10 and the clamping groove 401 are matched with each other. A roller 101 is rotatably embedded in the groove at the top of the outer wall of the workbench 1.

[0026] In a specific embodiment of this utility model, the clamping and positioning component drives the clamping rod 10 to rotate via the driving component. As the clamping cylinder 5 drives the guide plate 4 to approach each other, the clamping rod 10 gradually clamps the traffic light housing. One end of the clamping rod 10 is coated with a rubber layer. The guide plate 4 clamps the traffic light housing from the side, ensuring the accuracy of the screw hole drilling device on one side of the outer wall of the workbench 1 during descent. The clamping cylinder 5 provides initial preload, and combined with the servo feedback control of the clamping motor 6, it can compensate for housing deformation in real time, ensuring that the hole position does not shift during clamping. Through the first-stage meshing of the driving gear 7 and the rack 8, and the second-stage meshing of the rack 8 and the driven gear 9, a closed-loop power transmission chain is formed, realizing precise angle adjustment of the clamping rod 10, ensuring clamping stability, and avoiding shaking during drilling.

[0027] Specifically, the drive components include a clamping motor 6, a drive gear 7, a rack 8, and a driven gear 9.

[0028] In a specific embodiment of this utility model, the drive component can ensure the transmission of power.

[0029] Specifically, the clamping motor 6 is fixedly installed at the bottom of the outer wall of the mounting platform 402, the driving gear 7 is fixedly installed at the outer wall of the output end of the clamping motor 6, the driving gear 7 is meshed and connected with the rack 8, and the driven gear 9 is fixedly installed at the outer wall of one end of the clamping rod 10.

[0030] In a specific embodiment of this utility model, the driven gear 9 is fixedly disposed on the outer wall of one end of the clamping rod 10, which can ensure stable angle adjustment of the clamping rod 10.

[0031] Specifically, the rack 8 and the driven gear 9 are meshed and connected.

[0032] In specific embodiments of this utility model, precise transmission can be guaranteed.

[0033] Specifically, a protective plate 403 is fixedly installed on the top of the outer wall of the mounting platform 402.

[0034] In a specific embodiment of this utility model, a protective plate 403 is fixedly installed on the top of the outer wall of the mounting platform 402.

[0035] Specifically, the rack 8 is slidably embedded in the groove on the inner wall of the protective plate 403.

[0036] In a specific embodiment of this utility model, the rack 8 is slidably embedded in the groove on the inner wall of the protective plate 403, which can ensure the stable positioning of the rack 8 and prevent slippage.

[0037] Working principle:

[0038] The clamping motor 6 drives the drive gear 7 to idle for 2 revolutions to check if the rack 8's stroke is smooth. The clamping cylinder 5 performs 3 reciprocating motions to verify air pressure stability. The roller 101 on the worktable 1 automatically rotates to test and ensure normal rolling resistance. The operator gently places the traffic light housing on the surface of the worktable 1, with the edge of the housing contacting the roller 101. Utilizing the low friction characteristic of the roller 101, the operator manually pushes the housing to the coarse positioning area. Simultaneously, the clamping cylinder 5 actuates, driving the guide plates 4 on both sides to slide along the slide rail 2 towards the center, contacting the side of the housing through the clamping groove 401. The cylinder pressure is initially set to 0.4 MPa, and a preload of 20 N is applied to initially fix the housing in the center area of ​​the worktable 1. The clamping motor 6 starts, driving the rack 8 through the drive gear 7. The linear movement involves the rack 8 meshing with the driven gear 9, which in turn rotates the clamping rod 10, causing the rubber layer at the end of the clamping rod 10 to completely adhere to the curved edge of the lamp housing. The servo system monitors the clamping torque in real time, and locks the motor when the target value is reached, forming a rigid clamping structure. The clamping motor 6 dynamically fine-tunes the angle of the clamping rod 10 to ensure that the theoretical position of the screw hole matches the actual clamping state. The CNC drilling device on the outside of the worktable 1 presses down along the preset path, and the drill bit makes a precise hole through the center hole of the clamping groove 401 of the guide plate 4. After drilling is completed, the clamping cylinder 5 reverses the air flow, the guide plate 4 returns to its initial position, and the clamping motor 6 drives the clamping rod 10 to rotate to the opening angle, completely detaching it from the surface of the lamp housing. The operator then moves the lamp housing horizontally along the direction of the roller 101.

[0039] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A positioning fixture for screw holes in a traffic light housing, characterized in that, include, Workbench (1); A clamping and positioning assembly is located on the outer wall of the workbench (1), wherein: the clamping and positioning assembly includes a slide rail (2), a sliding sleeve (3), a guide plate (4), a clamping cylinder (5), a clamping rod (10), a clamping groove (401), a mounting platform (402), and a driving assembly. The slide rail (2) is fixedly installed at the top corner of the outer wall of the workbench (1). The sliding sleeve (3) is slidably fitted on the outer wall of the slide rail (2). The guide plate (4) is fixedly installed at the top opening of the outer wall of the sliding sleeve (3) by a lifting bolt. The clamping cylinder (5) The mounting platform (402) is fixedly mounted on the top two sides of the outer wall of the workbench (1) by a bracket. The mounting platform (402) is fixedly mounted on one side of the outer wall of the guide plate (4). The clamping groove (401) is opened on one side of the outer wall of the guide plate (4). The driving component is located on the outer wall of the mounting platform (402). The clamping rod (10) is rotatably inserted into the outer wall of the mounting platform (402). The clamping rod (10) and the clamping groove (401) are matched with each other. The roller (101) is rotatably embedded in the groove at the top of the outer wall of the workbench (1).

2. The positioning fixture for the screw hole of a traffic light housing according to claim 1, characterized in that, The drive assembly includes a clamping motor (6), a drive gear (7), a rack (8), and a driven gear (9).

3. The positioning fixture for the screw hole of a traffic light housing according to claim 2, characterized in that, The clamping motor (6) is fixedly installed at the bottom of the outer wall of the mounting platform (402), the driving gear (7) is fixedly installed at the outer wall of the output end of the clamping motor (6), the driving gear (7) is meshed and connected with the rack (8), and the driven gear (9) is fixedly installed at one end of the outer wall of the clamping rod (10).

4. The positioning fixture for the screw hole of a traffic light housing according to claim 3, characterized in that, The rack (8) and the driven gear (9) are meshed and connected.

5. A positioning fixture for screw holes in a traffic light housing according to claim 4, characterized in that, A protective plate (403) is fixedly installed on the top of the outer wall of the mounting platform (402).

6. The positioning fixture for the screw hole of a traffic light housing according to claim 5, characterized in that, The rack (8) is slidably embedded in the groove on the inner wall of the protective plate (403).

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