High-precision wire harness length measuring device

Abstract

The invention discloses a high-precision wire harness length measuring device, and relates to the technical field of wire harness production. The device comprises a shell and a precise measurement assembly, a feeding mechanism is arranged at the bottom of the shell, a cutting mechanism is arranged at the bottom of an inner cavity of the shell, the precise measurement assembly comprises a threaded column, the right side of the threaded column is movably connected with the inner wall of the shell, and the left side of the threaded column penetrates through the shell and is fixedly connected with a friction wheel. According to the invention, through the precise measurement assembly, the cooperation of the threaded column, the friction wheel and the counter, when the electric cylinder drives the threaded sleeve to drive the electric clamping jaw to move, the linear displacement of the wire harness is calculated through the number of rotation turns of the threaded column, so that the optical projection error caused by bending of the wire harness is avoided; meanwhile, the wire harness tightening mechanism applies constant pressure to the wire harness in the measurement process, it is ensured that the wire harness is always kept in a linear state, interference of arc deformation on length measurement is eliminated, and therefore the accuracy and consistency of measurement results are improved.

Description

Technical Field

[0001] This invention belongs to the field of wire harness manufacturing technology, and in particular relates to a high-precision wire harness length measuring device. Background Technology

[0002] A wire harness is an assembly consisting of multiple wires or cables bundled together for centralized management and transmission of power, signals, or data. It includes components such as conductors, connectors, insulating sleeves, and protective layers to ensure neat wiring and ease of installation. Its main functions are to avoid messy wiring, improve the reliability of electrical connections, and reduce electromagnetic interference. During the production process of wire harnesses, measuring devices are used to measure their length so that they can be cut to the required length according to needs.

[0003] Chinese patent application CN209957122U discloses a wire harness processing and cutting device with length measurement function, including a worktable, fixing blocks, a back baffle, a first groove, and a control panel. Fixing blocks are installed at both ends of the worktable on the side away from the control panel. Equally spaced locking blocks are fixed to the outer walls of both ends of the central shaft, with buckles installed at both ends of each locking block. A concave groove is provided at the bottom of the horizontal plate, and a support plate is provided below the horizontal plate. Second one-way telescopic rods are installed inside the second grooves on both sides of the bottom end of the support plate. An ultraviolet emitting head is fixed to the inner wall of the cavity, and an ultraviolet receiving head is installed on the inner wall of the cavity on the side away from the cavity. A first groove is provided on the inner wall of the side plate on one side of the cavity, and a first one-way telescopic rod is installed inside the first groove at the bottom end of the push plate. This invention not only improves the convenience of the cutting device and expands its application range, but also extends its service life.

[0004] Although the patent achieves the function of easy material replacement through the cooperation of buckles and slots, it measures the length of the wire bundle through an ultraviolet emitting head and an ultraviolet receiving head. Due to the flexibility of the wire bundle, it is easily bent and deformed by the force of the guiding mechanism during the transportation process. This causes the wire bundle to be arc-shaped rather than straight in the measurement area. As a result, the projected length of the ultraviolet beam on the bent wire bundle is greater than its actual straight length. At the same time, bending will cause the local occlusion range of the wire bundle to increase or produce shadow errors. The change in the light signal detected by the receiving head does not match the actual straight length, affecting the detection accuracy.

[0005] To address these issues, we provide a high-precision wire harness length measuring device. Summary of the Invention

[0006] The purpose of this invention is to provide a high-precision wire harness length measuring device. By combining a precision measuring component and a feeding mechanism, it solves the problem that the measurement accuracy of existing wire harness length measuring devices, which use ultraviolet light beam projection, is easily reduced due to wire harness bending.

[0007] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution.

[0008] This invention relates to a high-precision wire harness length measuring device, comprising a housing and a precision measuring component. A feeding mechanism is located at the bottom of the housing, and a cutting mechanism is located at the bottom of the housing's inner cavity. The precision measuring component includes a threaded post; the right side of the threaded post is movably connected to the inner wall of the housing; a friction wheel is fixedly connected to the left side of the threaded post, penetrating the housing; a counter is fixedly connected to the left side of the housing; a threaded sleeve is threadedly connected to the surface of the threaded post; an electric gripper is fixedly connected to the front side of the threaded sleeve; an electric cylinder is fixedly connected to the rear side of the housing; the left side of the output end of the electric cylinder is fixedly connected to the threaded sleeve; and a wire harness tensioning mechanism is located on the right side of the housing's inner cavity.

[0009] The invention is further configured such that the feeding mechanism includes a control housing, the top of which is fixedly connected to a housing, a servo motor is fixedly connected to the left side of the inner cavity of the control housing, a screw is fixedly connected to the right side of the output end of the servo motor, a telescopic rod is threaded onto the surface of the screw, the right side of the telescopic rod passes through the control housing and is fixedly connected to a fixing frame, cylinders are fixedly connected to the front and rear sides of the fixing frame, and the output ends of the two cylinders on opposite sides pass through the fixing frame and are fixedly connected to clamps. The control housing facilitates the installation and fixing of the servo motor, the servo motor can cooperate with the screw to control the position of the telescopic rod and the fixing frame, the cylinders can cooperate with the clamps to fix one end of the wire harness, and the screw and the telescopic rod cooperate to feed one end of the wire harness into the wire harness tensioning mechanism.

[0010] The invention is further configured such that slide rails are fixedly connected to the front and rear sides of the inner cavity of the control shell, and sliders are slidably connected to the surface of the slide rails. The opposite sides of the two sliders are fixedly connected to the telescopic rod. The slide rails and sliders can limit the telescopic rod, so that it can be smoothly adjusted to the left and right positions.

[0011] The present invention is further configured such that the cutting mechanism includes a cutting frame, the top of the cutting frame is fixedly connected to the inner wall of the housing, a hydraulic cylinder is fixedly connected to the top of the cutting frame, and a cutter is fixedly connected to the bottom of the output end of the hydraulic cylinder through the cutting frame. The cutting frame facilitates the installation and fixing of the hydraulic cylinder, the hydraulic cylinder is used to control the operating height of the cutter, and the cutter can cut the wire harness.

[0012] The invention is further configured such that the wire harness tensioning mechanism includes a clamping frame, the bottom of which is fixedly connected to the inner wall of the housing, a spring is fixedly connected to the top of the inner cavity of the clamping frame, a pressure roller is fixedly connected to the bottom of the spring, a drive motor is fixedly connected to the bottom of the front side of the clamping frame, and a rotating wheel is fixedly connected to the rear side of the output end of the drive motor through the clamping frame. The spring can control the pressure roller to press down on the rotating wheel, the drive motor can control the rotating wheel to rotate, and the rotating wheel can cooperate with the pressure roller to transport the wire harness. After the electric gripper fixes and pulls the wire harness, the drive motor stops working, and the wire harness is straightened by the friction force generated by the cooperation of the spring and the pressure roller.

[0013] The invention is further configured such that limiting rods are fixedly connected to the front and rear sides of the top of the pressure roller, and the top of the limiting rods passes through the pressing frame and is fixedly connected to a limiting plate. The limiting rods and the limiting plate can limit the pressure roller, so that it can move up and down smoothly.

[0014] The present invention is further configured such that a slide is fixedly connected to the rear side of the bottom of the inner cavity of the housing, a positioning block is slidably connected inside the slide, the top of the positioning block is fixedly connected to the threaded sleeve, and the slide and the positioning block are used to limit the threaded sleeve and prevent it from rotating during movement.

[0015] The present invention has the following beneficial effects.

[0016] 1. This invention utilizes a precision measurement component, in conjunction with a threaded column, a friction wheel, and a counter, to calculate the linear displacement of the wire harness by the number of rotations of the threaded column when the electric cylinder drives the threaded sleeve to move the electric gripper. This avoids optical projection errors caused by wire harness bending. Simultaneously, the wire harness tensioning mechanism applies constant pressure to the wire harness during the measurement process, ensuring that the wire harness always remains straight and eliminating interference from arc deformation on length measurement, thereby improving the accuracy and consistency of the measurement results.

[0017] 2. This invention utilizes a feeding mechanism that employs a servo motor to drive a screw, controlling the movement of a telescopic rod and a fixed frame. This, combined with a cylinder, pushes a clamping plate to hold the end of the wire harness, achieving automatic feeding and positioning of the wire harness. Simultaneously, the drive motor in the wire harness tensioning mechanism drives the rotating wheel and pressure wheel to rotate in tandem, maintaining the wire harness tension during feeding and preventing slackness or bending. This further ensures that the wire harness remains straight in the measurement section, providing a stable foundation for accurate measurement. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Figure 1 A perspective view of a high-precision wire harness length measuring device;

[0020] Figure 2 This is a side view of a high-precision wire harness length measuring device;

[0021] Figure 3 A cross-sectional view of the housing and control housing in a high-precision wire harness length measuring device;

[0022] Figure 4 This is a schematic diagram of a precision measurement component in a high-precision wire harness length measuring device.

[0023] Figure 5 This is a schematic diagram of a wire harness tensioning mechanism in a high-precision wire harness length measuring device.

[0024] In the attached diagram: 1. Housing; 2. Precision measuring component; 21. Threaded post; 22. Friction wheel; 23. Counter; 24. Threaded sleeve; 25. Electric gripper; 26. Electric cylinder; 27. Wire harness tensioning mechanism; 271. Pressing frame; 272. Spring; 273. Pressure roller; 274. Drive motor; 275. Rotating wheel; 3. Feeding mechanism; 31. Control housing; 32. Servo motor; 33. Screw; 34. Telescopic rod; 35. Fixing frame; 36. Cylinder; 37. Clamping plate; 4. Cutting mechanism; 41. Cutting frame; 42. Hydraulic cylinder; 43. Cutting blade. Detailed Implementation

[0025] The technical solutions of the present invention will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present invention, and not all embodiments.

[0026] Example 1

[0027] Please see Figure 1-5 This invention relates to a high-precision wire harness length measuring device, comprising a housing 1 and a precision measuring component 2. A feeding mechanism 3 is provided at the bottom of the housing 1, and a cutting mechanism 4 is provided at the bottom of the inner cavity of the housing 1. The precision measuring component 2 includes a threaded post 21, the right side of which is movably connected to the inner wall of the housing 1, and a friction wheel 22 is fixedly connected to the left side of the threaded post 21 through the housing 1. A counter 23 is fixedly connected to the left side of the housing 1. A threaded sleeve 24 is threadedly connected to the surface of the threaded post 21, and an electric gripper 25 is fixedly connected to the front side of the threaded sleeve 24. An electric cylinder 26 is fixedly connected to the rear side of the housing 1, and the left side of the output end of the electric cylinder 26 is fixedly connected to the threaded sleeve 24. A wire harness tensioning mechanism 27 is provided on the right side of the inner cavity of the housing 1.

[0028] Specifically: the feeding mechanism 3 can feed the wire harness to be measured into the wire harness tensioning mechanism 27; the cutting mechanism 4 can cut the wire harness after measurement; the threaded column 21 can control the friction wheel 22 to rotate; the friction wheel 22 is used to drive the input end of the counter 23 to record the number of rotations of the threaded column 21; the wire harness pull-out length is obtained by multiplying the lead of the threaded column 21 by the number of rotations of the counter 23; the electric cylinder 26 can control the threaded sleeve 24 to move and adjust the threaded sleeve 24 to the specified position; the wire harness tensioning mechanism 27 can keep the wire harness in a taut state after the electric gripper 25 fixes the wire harness, thereby improving the measurement accuracy.

[0029] Example 2

[0030] Please see Figure 1-5 Based on Embodiment 1, the feeding mechanism 3 includes a control housing 31, the top of which is fixedly connected to the housing 1. A servo motor 32 is fixedly connected to the left side of the inner cavity of the control housing 31. A screw 33 is fixedly connected to the right side of the output end of the servo motor 32. A telescopic rod 34 is threadedly connected to the surface of the screw 33. A fixing frame 35 is fixedly connected to the right side of the telescopic rod 34 through the control housing 31. Cylinders 36 are fixedly connected to the front and rear sides of the fixing frame 35. The output ends of the two cylinders 36 on opposite sides of the fixing frame 35 are fixedly connected to clamps 37. Slide rails are fixedly connected to the front and rear sides of the inner cavity of the control housing 31. Slider blocks are slidably connected to the surface of the slide rails. The opposite sides of the two slider blocks are fixedly connected to the telescopic rod 34. The cutting mechanism 4 includes a cutting frame 41, the top of which is fixedly connected to the inner wall of the housing 1. A hydraulic cylinder 42 is fixedly connected to the top of the cutting frame 41. The bottom of the output end of the hydraulic cylinder 42 passes through the cutting frame 41 and is fixedly connected to a cutter 43. The wire harness tensioning mechanism 27 includes a clamping frame 271. The bottom of the clamping frame 271 is fixedly connected to the inner wall of the housing 1. A spring 272 is fixedly connected to the top of the inner cavity of the clamping frame 271. A pressure roller 273 is fixedly connected to the bottom of the spring 272. A drive motor 274 is fixedly connected to the bottom of the front side of the clamping frame 271. A rotating wheel 275 passes through the clamping frame 271 and is fixedly connected to the rear side of the output end of the drive motor 274. A limit rod is fixedly connected to the front and rear sides of the top of the pressure roller 273. The top of the limit rod passes through the clamping frame 271 and is fixedly connected to a limit plate. A slide is fixedly connected to the rear side of the bottom of the inner cavity of the housing 1. A positioning block is slidably connected inside the slide. The top of the positioning block is fixedly connected to the threaded sleeve 24.

[0031] Specifically: the control housing 31 facilitates the installation and fixation of the servo motor 32. The servo motor 32 can cooperate with the screw 33 to control the position of the telescopic rod 34 and the fixing frame 35. The cylinder 36 can cooperate with the clamping plate 37 to fix one end of the wire harness, and the screw 33 cooperates with the telescopic rod 34 to feed one end of the wire harness into the wire harness tensioning mechanism 27. The slide rail and slider can limit the telescopic rod 34, so that it can be smoothly adjusted to the left and right positions. The cutting frame 41 facilitates the installation and fixation of the hydraulic cylinder 42. The hydraulic cylinder 42 is used to control the working height of the cutter 43, and the cutter 43 can cut the wire harness. The spring 272 controls the pressure roller 273 to press down on the rotating roller 275, and the drive motor 274 controls the rotating roller 275 to rotate. The rotating roller 275 cooperates with the pressure roller 273 to transport the wire harness. After the electric gripper 25 fixes and pulls the wire harness, the drive motor 274 stops working. The friction generated by the spring 272 and the pressure roller 273 straightens the wire harness. The limit rod and limit plate limit the pressure roller 273 to allow it to move up and down smoothly. The slide and positioning block limit the threaded sleeve 24 to prevent it from rotating during movement.

[0032] The working principle of this invention is as follows: Cylinder 36 and clamping plate 37 cooperate to clamp and fix the wire harness. Then, servo motor 32 is started. Servo motor 32, screw 33 and telescopic rod 34 cooperate to push fixing frame 35 to move to the right, feeding the end of the wire harness between pressure roller 273 and rotating roller 275. At this time, drive motor 274 starts and drives rotating roller 275 to rotate, so that it cooperates with pressure roller 273 to continue to feed the wire harness to the right. At the same time, electric gripper 25 clamps and fixes the end of the wire harness. Then, cylinder 36 controls clamping plate 37 to release the wire harness, servo motor 32 controls fixing frame 35 to move to the left to reset, and then drive motor 274 stops working. At this time, spring 272 pushes pressure roller 273 downward. The wire harness is pressed against the surface of the rotating wheel 275. Then, the electric cylinder 26 controls the threaded sleeve 24 to drive the electric gripper 25 to move to the left to pull the wire harness and keep it taut. At the same time, during the movement of the electric gripper 25, the threaded sleeve 24 drives the threaded post 21 to rotate. The threaded post 21 drives the friction wheel 22 to rotate synchronously, and the counter 23 records the number of rotations. The pulled-out length of the wire harness is obtained by multiplying the number of rotations by the lead of the threaded post 21. After the measurement is completed, the hydraulic cylinder 42 controls the cutter 43 to move downward to cut the wire harness, ensuring that the wire harness always remains straight and eliminating the interference of arc deformation on the length measurement, thereby improving the accuracy and consistency of the measurement results.

[0033] The preferred embodiments of the present invention disclosed above are only for the purpose of illustrating the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation described herein. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can better understand and utilize the present invention.

Claims

1. A high-precision wire harness length measuring device, comprising a housing (1) and a precision measuring component (2), characterized in that: The bottom of the housing (1) is provided with a feeding mechanism (3), and the bottom of the inner cavity of the housing (1) is provided with a cutting mechanism (4); The precision measurement component (2) includes a threaded post (21), the right side of which is movably connected to the inner wall of the housing (1), the left side of which penetrates the housing (1) and is fixedly connected to a friction wheel (22), the left side of which is fixedly connected to a counter (23), the surface of which is threadedly connected to a threaded sleeve (24), the front side of which is fixedly connected to an electric gripper (25), the rear side of which is fixedly connected to an electric cylinder (26), the left side of which is fixedly connected to the output end of the electric cylinder (26), and the right side of which is provided with a wire harness tensioning mechanism (27).

2. The high-precision wire harness length measuring device according to claim 1, characterized in that: The feeding mechanism (3) includes a control housing (31), the top of which is fixedly connected to the housing (1). A servo motor (32) is fixedly connected to the left side of the inner cavity of the control housing (31). A screw (33) is fixedly connected to the right side of the output end of the servo motor (32). A telescopic rod (34) is threadedly connected to the surface of the screw (33). A fixing frame (35) is fixedly connected to the right side of the telescopic rod (34) through the control housing (31). A cylinder (36) is fixedly connected to both the front and rear sides of the fixing frame (35). The output ends of the two cylinders (36) on opposite sides of each other pass through the fixing frame (35) and are fixedly connected to a clamping plate (37).

3. The high-precision wire harness length measuring device according to claim 2, characterized in that: The front and rear sides of the inner cavity of the control housing (31) are fixedly connected to slide rails, and sliders are slidably connected to the surface of the slide rails. The opposite sides of the two sliders are fixedly connected to the telescopic rod (34).

4. The high-precision wire harness length measuring device according to claim 1, characterized in that: The cutting mechanism (4) includes a cutting frame (41), the top of which is fixedly connected to the inner wall of the housing (1), and a hydraulic cylinder (42) is fixedly connected to the top of the cutting frame (41). The bottom of the output end of the hydraulic cylinder (42) passes through the cutting frame (41) and is fixedly connected to a cutter (43).

5. The high-precision wire harness length measuring device according to claim 1, characterized in that: The wire harness tensioning mechanism (27) includes a clamping frame (271), the bottom of which is fixedly connected to the inner wall of the housing (1), a spring (272) is fixedly connected to the top of the inner cavity of the clamping frame (271), a pressure roller (273) is fixedly connected to the bottom of the spring (272), a drive motor (274) is fixedly connected to the bottom of the front side of the clamping frame (271), and a rotating wheel (275) is fixedly connected to the rear side of the output end of the drive motor (274) through the clamping frame (271).

6. The high-precision wire harness length measuring device according to claim 5, characterized in that: Limiting rods are fixedly connected to the front and rear sides of the top of the pressure roller (273), and the top of the limiting rods passes through the pressing frame (271) and is fixedly connected to the limiting plate.

7. The high-precision wire harness length measuring device according to claim 1, characterized in that: A slide is fixedly connected to the rear side of the bottom of the inner cavity of the housing (1), and a positioning block is slidably connected inside the slide. The top of the positioning block is fixedly connected to the threaded sleeve (24).

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