A device for detecting the curvature of a car trailing arm

Abstract

This utility model discloses a vehicle trailing arm curvature detection device, including a frame and a worktable mounted on the frame. The worktable is equipped with a moving mechanism, a limiting mechanism, and a detection mechanism connected to the moving mechanism. The moving mechanism includes X / Y / Z axis guide rail assemblies and corresponding drive motors, which can drive the detection mechanism to move along the three axes. The limiting mechanism includes X-axis, Y-axis, and Z-axis limiting components. The X-axis is positioned by first and second limiting blocks, a long-axis cylinder, and a conical stop block. The Y-axis is positioned by a pair of pressing components pressing against the fixing arm. The Z-axis is limited by a rotating pressing cylinder, a pressure block, and an adjusting screw, achieving precise three-way fixing of the vehicle trailing arm. The detection mechanism consists of a detection bracket and a detection sensor, with the detection head facing the vehicle trailing arm. This device has a reasonable structure, stable limiting, and accurate and efficient detection, making it suitable for detecting the curvature of vehicle trailing arms.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts testing technology, specifically to an automotive trailing arm curvature testing device. Background Technology

[0002] The trailing arm is an important component of the automotive suspension system. The curvature of the trailing arm must meet strict design standards, otherwise it may lead to suspension system failure or a decrease in vehicle performance. Therefore, rapid and accurate detection of the curvature of the trailing arm is a key step in ensuring product quality.

[0003] In existing technologies, the detection of the trailing arm curvature of automobiles is typically performed manually or using semi-automated equipment. For example, operators use calipers, templates, or coordinate measuring machines to manually measure specific parts of the trailing arm. These methods usually require placing the trailing arm on a fixed platform, manually adjusting its position, collecting data point by point, and then evaluating whether the curvature meets the requirements through calculation or comparison. In addition, some improved devices use simple clamps to fix the trailing arm and use sensors for detection, but the movement and limiting methods are relatively simple, often only allowing adjustment in one direction. The detection process relies on operator experience and has a low degree of automation.

[0004] Therefore, the above problems urgently need to be solved. Utility Model Content

[0005] Purpose of the utility model: In order to overcome the above shortcomings, the purpose of this utility model is to provide a vehicle trailing arm curvature detection device. By setting up a three-way limiting mechanism in X, Y, and Z directions to accurately limit the vehicle trailing arm in all directions, and with the help of a moving mechanism that can move along the X, Y, and Z directions to drive the detection sensor, the device can realize automated, fast and accurate detection of the curvature of the trailing arm's side arc, eliminating the dependence on the operator's experience and improving detection efficiency and accuracy.

[0006] Technical solution: This utility model provides a vehicle trailing arm curvature detection device, including a frame; a worktable, the worktable being mounted on the frame; a moving mechanism, mounted on the worktable, the moving mechanism being movable along the X, Y, and Z directions; a detection mechanism, connected to the moving mechanism, the detection mechanism moving with the moving mechanism to detect the curvature of the vehicle trailing arm; and a limiting mechanism, mounted on the worktable, used to limit the vehicle trailing arm to be detected in the X, Y, and Z directions.

[0007] Furthermore, in this application, a vehicle trailing arm curvature detection device includes a limiting mechanism comprising an X-direction limiting component. This X-direction limiting component includes a first limiting block and a second limiting block, both mounted on a worktable. The vehicle trailing arm includes a pair of forked arms and a fixed arm. One end of each forked arm is connected to the fixed arm to form an arc-shaped side surface. The detection mechanism is used to detect the curvature of the arc above the arc-shaped side surface. The arc-shaped side surface is arranged along the X-direction. Corresponding to the arc-shaped side surface in the X-direction is the end cross-section of the fixed arm, which abuts against the second limiting block. A long-shaft cylinder is provided on the first limiting block along the X-direction. The output end of the long-shaft cylinder is provided with a conical abutment, which corresponds to a mounting hole on the arc-shaped side surface. The second limiting block abuts against the end cross-section of the vehicle trailing arm, limiting the workpiece position from the X-direction end and preventing end displacement. The long-shaft cylinder drives the conical abutment, precisely engaging with the mounting hole on the arc-shaped side surface of the trailing arm and tightly abutting against the second limiting block.

[0008] Furthermore, in the automotive trailing arm curvature detection device of this application, the limiting mechanism further includes a Y-direction limiting component. The Y-direction limiting component includes a pair of pressing components, which are used to press against a pair of sides of the fixed arm in the Y direction. Each pressing component includes a cylinder mounting base mounted on a worktable, a first cylinder mounted on the cylinder mounting base in the Y direction, a slide rail mounted on the worktable in the Y direction, and a slide table slidably engaged with the slide rail. Push arms are mounted on both sides of the slide table. The output end of the first cylinder is connected to the slide table, used to drive the slide table to slide along the slide rail and move the push arms. The pair of pressing components move towards each other, precisely pressing against the two sides of the fixed arm in the Y direction, thus laterally limiting the workpiece position.

[0009] Furthermore, in the automotive trailing arm curvature detection device of this application, the limiting mechanism further includes a Z-axis limiting component. The Z-axis limiting component includes a rotary pressing cylinder, the output end of which is provided with a pressure block. The end of the pressure block is provided with an adjusting screw, which is perpendicular to the top surface of the fixed arm. The rotary pressing cylinder drives the pressure block to rotate around its output end to avoid the clamping space, and then moves downwards along the Z-axis. The pressure block presses against the top surface of the fixed arm, thus limiting the workpiece position vertically. The adjusting screw at the end of the pressure block is perpendicular to the top surface of the fixed arm, and its screwing allows for flexible adjustment of the contact height and pressing force between the pressure block and the top surface of the fixed arm.

[0010] Furthermore, in this application, a vehicle trailing arm curvature detection device includes a moving mechanism comprising an X-axis guide rail assembly, a Y-axis guide rail assembly, and a Z-axis guide rail assembly. The X-axis guide rail assembly includes a pair of X-axis guide rails arranged along the X-axis direction and an X-axis slider that can slide along the X-axis guide rails. The Y-axis guide rail assembly includes a Y-axis guide rail arranged along the Y-axis direction and a Y-axis slider that can slide along the Y-axis guide rail. The Y-axis guide rail is connected to the X-axis slider. The Z-axis guide rail assembly is connected to the Y-axis slider and includes a Z-axis guide rail and a Z-axis slider. The detection mechanism is connected to the Z-axis slider. Through the connection of the X-axis and Y-axis guide rail assemblies (Y-axis guide rail connected to X-axis slider) and the connection of the Y-axis and Z-axis guide rail assemblies (Z-axis assembly connected to Y-axis slider), an X / Y / Z three-way linkage mechanism is formed, driving the detection mechanism to move to any position within space.

[0011] Furthermore, in the automotive trailing arm curvature detection device of this application, the moving mechanism further includes an X-axis drive motor, a Y-axis drive motor, and a Z-axis drive motor. The X-axis drive motor drives the X-axis slider to move along the X-axis guide rail, the Y-axis drive motor drives the Y-axis slider to move along the Y-axis guide rail, and the Z-axis drive motor drives the Z-axis slider to move along the Z-axis guide rail. The drive motors, in conjunction with the motor controller, enable digital adjustment of the displacement. Compared to manual drive, this allows for precise control of the movement distance of the detection mechanism, ensuring consistent positioning of the detection points.

[0012] Furthermore, this application discloses a vehicle trailing arm curvature detection device. The detection mechanism includes a detection bracket and a detection sensor. The detection sensor is mounted on the detection bracket, which is connected to a Z-axis slider. The detection head of the detection sensor faces the vehicle trailing arm below. With the detection head facing the vehicle trailing arm, the sensor can directly collect morphological data (such as distance and contour) of the upper arc line on the side of the trailing arm's curved surface, completing the core data acquisition action for curvature detection.

[0013] As can be seen from the above technical solution, this utility model has the following beneficial effects: 1. The automobile trailing arm curvature detection device of this utility model, by setting up an X, Y, Z three-way limiting mechanism, including an X-direction limiting component, a Y-direction limiting component and a Z-direction limiting component, can accurately limit the automobile trailing arm in all directions, ensuring the stability and repeatability of the workpiece during the detection process, effectively avoiding measurement errors caused by workpiece displacement, thereby significantly improving the detection accuracy.

[0014] 2. The automobile trailing arm curvature detection device of this utility model uses a moving mechanism to drive the detection mechanism to move along the X, Y, and Z directions. Combined with the digital control of the drive motor, it realizes automated and rapid scanning detection of the curvature of the trailing arm arc side, eliminating the dependence on the operator's experience, reducing human intervention, greatly improving detection efficiency, and ensuring the consistency and reliability of the detection data. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a vehicle trailing arm curvature detection device according to the present invention; Figure 2 for Figure 1 Enlarged schematic diagram of region A in the middle.

[0016] Explanation of reference numerals in the instruction manual: 1-Frame; 2-Workbench; 3-Moving mechanism, 31-X-axis guide rail assembly, 311-X-axis guide rail, 312-X-axis slider, 313-X-axis drive motor, 32-Y-axis guide rail assembly, 321-Y-axis guide rail, 322-Y-axis slider, 323-Y-axis drive motor, 33-Z-axis guide rail assembly, 331-Z-axis guide rail, 332-Z-axis slider, 333-Z-axis drive motor; 4-Detection mechanism, 41-Detection bracket, 42-Detection sensor, 421-Detection head; 5-Limiting mechanism, 51-X-direction limiting component, 511-first limiting block, 512-second limiting block, 513-long shaft cylinder, 5131-conical stop block, 52-Y-direction limiting component, 521-pressing component, 5211-cylinder mounting base, 5212-first cylinder, 5213-slide rail, 5214-slide table, 5215-push arm, 53-Z-direction limiting component, 531-rotary pressing cylinder, 532-pressing block, 533-adjusting screw; 6-Car trailing arm, 61-Fork arm, 62-Fixed arm, 621-Arc side, 6211-Mounting hole, 622-End cross-section, 623-Side, 624-Top surface. Detailed Implementation

[0017] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0018] This embodiment is based on Figure 1 and Figure 2 The structure shown illustrates the practical application process of the automotive trailing arm curvature detection device.

[0019] The frame 1 serves as the overall supporting foundation, with the worktable 2 horizontally fixed at the top of the frame 1 to ensure the stability of the device during operation. The moving mechanism 3 is installed above the worktable 2. A pair of X-axis guide rails 311 of the X-axis guide rail assembly 31 are laid parallel to each other on both sides of the worktable 2. The X-axis slider 312 slides with the X-axis guide rails 311. The X-axis drive motor 313 is fixed to one end of the X-axis guide rail 311 and is connected to the X-axis slider 312 through a transmission structure to achieve precise drive in the X-axis direction. The Y-axis guide rail 321 of the Y-axis guide rail assembly 32 is vertically mounted on the X-axis slider 312. The Y-axis slider 322 is fitted onto the Y-axis guide rail 321. The Y-axis drive motor 323 is located at the end of the Y-axis guide rail 321 and is used to control the reciprocating movement of the Y-axis slider 322. The Z-axis guide rail 331 of the Z-axis guide rail assembly 33 is vertically fixed to the side of the Y-axis slider 322. The Z-axis slider 332 is slidably connected to the Z-axis guide rail 331. The Z-axis drive motor 333 is installed at the top of the Z-axis guide rail 331 and drives the Z-axis slider 332 to move up and down in the vertical direction.

[0020] The detection bracket 41 of the detection mechanism 4 is rigidly connected to the Z-axis slider 332. The detection sensor 42 is fixed on the detection bracket 41. The installation angle of the detection bracket 41 is adjusted so that the detection head 421 of the detection sensor 42 is facing the center detection area of ​​the worktable 2, ensuring that the detection head 421 can accurately capture the arc side 621 contour of the car longitudinal arm 6.

[0021] Each component of the limiting mechanism 5 is fixed in a preset position: the first limiting block 511 and the second limiting block 512 of the X-direction limiting component 51 are respectively fixed at both ends of the worktable 2 along the X direction. The long shaft cylinder 513 on the first limiting block 511 is installed along the X-axis direction, and the conical abutment 5131 at its output end is aligned with the center of the worktable 2, corresponding to the position of the mounting hole 6211 on the arc side 621 of the automobile longitudinal arm 6. A pair of clamping components 521 of the Y-direction limiting component 52 are symmetrically distributed on both sides of the worktable 2 along the Y direction. The cylinder mounting seat 5211 of the clamping component 521 is fixed on the worktable 2. The first cylinder 5212 is mounted on the cylinder mounting seat 5211 along the Y-axis. The slide rail 5213 is parallel to the first cylinder 5212 and fixed on the surface of the worktable 2. The slide table 5214 is slidably engaged with the slide rail 5213. The push arm 5215 is symmetrically mounted on the side of the slide table 5214 near the car longitudinal arm 6. The output end of the first cylinder 5212 is connected to the slide table 5214. The rotary pressing cylinder 531 of the Z-direction limiting component 53 is mounted on a bracket above the worktable 2. Its output end is connected to the pressure block 532. The adjusting screw 533 is threaded through the end of the pressure block 532, and the lower end face of the adjusting screw 533 is perpendicular to the top surface 624 of the fixed arm 62 of the car longitudinal arm 6.

[0022] Workpiece clamping and inspection process The car longitudinal arm 6 is placed in the inspection station of the workbench 2, the fixed arm 62 is located in the center of the inspection area, the arc side 621 is set upward, and the end cross section 622 of the fixed arm 62 is in close contact with the second limiting block 512.

[0023] The long-axis cylinder 513 of the X-axis limiting assembly 51 is activated. The long-axis cylinder 513 pushes the conical block 5131 to move along the X-axis until the conical block 5131 is inserted into the mounting hole 6211 on the arc side 621, and cooperates with the second limiting block 512 to achieve the X-axis positioning of the vehicle trailing arm 6.

[0024] The first cylinder 5212 of the Y-direction limiting component 52 is activated. The first cylinder 5212 drives the slide table 5214 to slide along the slide rail 5213 towards the fixed arm 62, causing the push arm 5215 to move towards each other until the push arm 5215 and a pair of sides 623 of the fixed arm 62 are tightly pressed together, thus completing the Y-direction clamping.

[0025] The rotating downward cylinder 531 of the Z-axis limiting component 53 first rotates to avoid the space above the car trailing arm 6, and then moves downward along the Z-axis direction, so that the pressure block 532 is close to the top surface 624 of the fixed arm 62. The adjusting screw 533 is turned to adjust the clamping force until the lower end of the adjusting screw 533 presses against the top surface 624, thus achieving Z-axis limiting. At this time, the car trailing arm 6 is firmly fixed in three directions.

[0026] By setting the detection path parameters through the control system, the X-axis drive motor 313, Y-axis drive motor 323 and Z-axis drive motor 333 of the moving mechanism 3 are started, driving the detection mechanism 4 to move along the preset path. The detection head 421 collects the contour data of the arc above the arc side 621 in real time and transmits it to the control system.

[0027] The control system compares the collected actual curvature data with preset standard parameters, automatically determines whether the curvature of the vehicle trailing arm 6 meets the requirements, generates a test report, and outputs the results.

[0028] After the inspection is completed, the Z-direction limiting component 53, Y-direction limiting component 52 and X-direction limiting component 51 are activated in reverse order to release the fixation on the car longitudinal arm 6, remove the workpiece, and complete a single inspection operation.

[0029] The above embodiments are exemplary and are intended to illustrate the technical concept and features of this utility model, so that those skilled in the art can understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A device for detecting the curvature of a car trailing arm, characterized in that: include: Frame (1); Workbench (2), which is mounted on frame (1); A moving mechanism (3) is provided on the worktable (2), and the moving mechanism (3) can move along the X, Y and Z directions; The detection mechanism (4) is connected to the moving mechanism (3), and the detection mechanism (4) moves with the moving mechanism (3) to detect the curvature of the car trailing arm (6); The limiting mechanism (5) is set on the worktable (2) and is used to limit the car longitudinal arm (6) to be tested in the X, Y and Z directions.

2. The vehicle trailing arm curvature detection device according to claim 1, characterized in that, The limiting mechanism (5) includes an X-direction limiting component (51), which includes a first limiting block (511) and a second limiting block (512). The first limiting block (511) and the second limiting block (512) are mounted on the workbench (2). The automotive longitudinal arm (6) includes a pair of forks (61) and a fixed arm (62). One end of the two forks (61) is connected to the fixed arm (62) to form an arc side surface (621). The detection mechanism (4) is used to detect the curvature of the arc line above the arc side surface (621). The arc-shaped side surface (621) is arranged along the X direction. Corresponding to the arc-shaped side surface (621) in the X direction is the end cross-section (622) of the fixed arm (62). The end cross-section (622) abuts against the second limiting block (512). The first limiting block (511) is provided with a long shaft cylinder (513) along the X direction. The output end of the long shaft cylinder (513) is provided with a conical stop block (5131). The conical stop block (5131) corresponds to the mounting hole (6211) provided on the arc-shaped side surface (621).

3. The vehicle trailing arm curvature detection device according to claim 2, characterized in that, The limiting mechanism (5) further includes a Y-direction limiting component (52), which includes a pair of pressing components (521). The pair of pressing components (521) are used to press against a pair of side surfaces (623) of the fixed arm (62) in the Y direction. The pressing component (521) includes a cylinder mounting seat (5211), which is mounted on the worktable (2). A first cylinder (5212) is arranged along the Y direction, a slide rail (5213) is arranged along the Y direction on the worktable (2), and a slide table (5214) is slidably engaged with the slide rail (5213). Push arms (5215) are installed on both sides of the slide table (5214). The output end of the first cylinder (5212) is connected to the slide table (5214) to drive the slide table (5214) to slide along the slide rail (5213) and drive the push arms (5215) to move.

4. The vehicle trailing arm curvature detection device according to claim 3, characterized in that, The limiting mechanism (5) further includes a Z-direction limiting component (53), which includes a rotary pressing cylinder (531). The output end of the rotary pressing cylinder (531) is provided with a pressing block (532), and the end of the pressing block (532) is provided with an adjusting screw (533). The adjusting screw (533) is perpendicular to the top surface (624) of the fixed arm (62).

5. The vehicle trailing arm curvature detection device according to claim 4, characterized in that, The moving mechanism (3) includes an X-axis guide rail assembly (31), a Y-axis guide rail assembly (32), and a Z-axis guide rail assembly (33). The X-axis guide rail assembly (31) includes a pair of X-axis guide rails (311) arranged along the X-axis direction and an X-axis slider (312) that can slide along the X-axis guide rails. The Y-axis guide rail assembly (32) includes a Y-axis guide rail (321) arranged along the Y-axis direction and a Y-axis slider (322) that can slide along the Y-axis guide rail (321). The Y-axis guide rail (321) is connected to the X-axis slider (312). The Z-axis guide rail assembly (33) is connected to the Y-axis slider (322). The Z-axis guide rail assembly (33) includes a Z-axis guide rail (331) and a Z-axis slider (332). The detection mechanism (4) is connected to the Z-axis slider (332).

6. The vehicle trailing arm curvature detection device according to claim 5, characterized in that, The moving mechanism (3) further includes an X-axis drive motor (313), a Y-axis drive motor (323), and a Z-axis drive motor (333). The X-axis drive motor (313) is used to drive the X-axis slider (312) to move along the X-axis guide rail (311). The Y-axis drive motor (323) is used to drive the Y-axis slider (322) to move along the Y-axis guide rail (321). The Z-axis drive motor (333) is used to drive the Z-axis slider (332) to move along the Z-axis guide rail (331).

7. The vehicle trailing arm curvature detection device according to claim 6, characterized in that, The detection mechanism (4) includes a detection bracket (41) and a detection sensor (42). The detection sensor (42) is mounted on the detection bracket (41). The detection bracket (41) is connected to the Z-axis slider (332). The detection head (421) of the detection sensor (42) faces the car longitudinal arm (6) below.

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