A transmission shaft outer diameter measuring instrument

Abstract

This utility model discloses a transmission shaft outer diameter measuring instrument, relating to the field of outer diameter measurement technology. It includes a housing, control panel, mounting plates, long rods, and electronic components. Multiple sets of mounting plates and long rods are vertically distributed and fixed to form a frame, which is divided into a left frame and a right frame. In this utility model, the control panel controls the electronic components to start a servo motor, causing a lead screw to rotate inside a lead block. This causes the lead block to move a laser rangefinder sensor along the length of a smooth rod. The control panel, through the electronic components, controls the laser rangefinder sensor to emit continuously modulated laser light. The distance is calculated by measuring the phase difference between the emitted and reflected light. The distance between the laser rangefinder sensor and the transmission shaft remains constant, and the rotating shaft maintains its rotation. Measurements are performed, and the measurement data is processed by the electronic components and displayed on the control panel's display screen in the form of a line graph, thereby achieving non-contact quantitative detection of the transmission shaft.

Description

Technical Field

[0006] ,

[0005] , ,

[0001] The utility model relates to the technical field of outer diameter detection, in particular to an outer diameter detector for a transmission shaft. Background Art

[0002] As a core component of the mechanical transmission system, the transmission shaft undertakes the key task of transmitting the engine power to the wheels in the automotive transmission system. Its outer diameter accuracy directly affects the accuracy of gear meshing. If there are dimensional deviations, problems such as slipping and abnormal noises will occur during power transmission, reducing the transmission efficiency by 10%-15%. In severe cases, it will also exacerbate component wear. In industrial mechanical equipment, such as the spindle transmission system of a machine tool, the accuracy of the outer diameter of the transmission shaft determines the accuracy of the machined parts. When the outer diameter size does not meet the requirements, it will cause the bearings to be not properly installed during the assembly process, leading to equipment vibration. This not only affects the product quality but may also cause the equipment to malfunction and stop, increasing the maintenance cost. In addition, insufficient outer diameter accuracy will破坏 the dynamic balance of the system, generating a large centrifugal force during mechanical operation. Long-term operation will accelerate the aging of components such as bearings and seals, reducing the stability and service life of the entire system and posing a potential threat to production safety.

[0003] However, traditional measurement methods and equipment have obvious defects. Manual tools such as vernier calipers and micrometers rely on manual operation, with extremely low measurement efficiency. It takes several minutes to detect a single workpiece, and the human reading error can reach more than 0.02 mm, which cannot meet the high-precision requirements and is only suitable for small-batch sampling inspection. Snap gauges / plug gauges can only qualitatively judge whether they are qualified and cannot obtain specific dimension data. Content of the Utility Model

[0004] The purpose of the utility model is to solve the problems existing in the prior art and propose an outer diameter detector for a transmission shaft.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme: An outer diameter detector for a transmission shaft includes an outer shell, a control panel, a mounting plate, a long rod, and electronic devices. Multiple groups of the mounting plates and multiple groups of the long rods are respectively vertically distributed and fixed to form a frame. The frame is divided into a left frame and a right frame. A transmission mechanism and an auxiliary positioning mechanism are fixedly installed inside the right frame. The transmission shaft is placed between the transmission mechanism and the auxiliary positioning mechanism. A laser ranging mechanism is centrally传动 connected to the transmission mechanism. The laser ranging mechanism is located outside the transmission shaft. The laser ranging mechanism includes a connecting rod, a fastening bolt, a wire block, and a laser ranging sensor. The connecting rod is slidably connected to the upper side of the wire block. The fastening bolt is threadedly connected to the wire block. The laser ranging sensor is fixedly connected to the end of the connecting rod. The laser ranging sensor is at the same height as the transmission shaft. The laser ranging sensor is electrically connected to the electronic devices through a wire.

[0006] It should be noted that there is an inappropriate expression "破坏" in the original text at ID=8, which should be corrected to a proper word according to the actual context. Here it is translated as "破坏" for the purpose of following the translation requirements.Preferably, the transmission mechanism includes a servo motor, a first clamping plate, a lead screw, a smooth rod, a driving pulley, a synchronous belt, and a driven pulley. The lead screw is threadedly connected inside the lead block, and the smooth rod is slidably connected inside the lead block.

[0007] Preferably, the two ends of the lead screw are rotatably connected to the mounting plate via bearings, the smooth rod is fixedly connected inside the right frame, and the driven pulley is fixedly installed at one end of the lead screw.

[0008] Preferably, the driven pulley is connected to the driving pulley via a synchronous belt, the driving pulley is fixedly mounted on the output shaft of the servo motor, and the middle part of the first chuck is fixedly mounted on the end of the output shaft of the servo motor.

[0009] Preferably, the servo motor and the electronic device are both fixedly installed inside the right frame, the outer casing is installed outside the right frame, and the control panel is fixedly installed outside the outer casing and electrically connected to the electronic device.

[0010] Preferably, the auxiliary positioning mechanism includes a second clamping plate and an extension rod. The second clamping plate and the first clamping plate are coaxial. The extension rod is fixedly connected to the middle of one side of the second clamping plate. The second clamping plate is rotatably connected to one of the sets of mounting plates through a bearing.

[0011] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0012] 1. In this utility model, the control panel enables electronic devices to start the servo motor, causing the lead screw to rotate inside the lead block. This causes the lead block to move the laser rangefinder sensor along the length of the smooth rod. The control panel, through electronic devices, controls the laser rangefinder sensor to emit continuously modulated laser light. The distance is calculated by measuring the phase difference between the emitted and reflected light. The distance between the laser rangefinder sensor and the drive shaft remains constant, and the rotating shaft maintains its rotation state for measurement. The measurement data is processed by electronic devices and displayed on the display of the control panel in the form of line graphs, thereby realizing non-contact quantitative detection of the drive shaft.

[0013] 2. In this utility model, the second clamping plate and the first clamping plate are located on the same straight line. After the transmission shaft is connected, the extension rod connected to the back side of the second clamping plate rotates in one of the mounting plates through the bearing, ensuring that the transmission shaft rotates stably without deviation and ensuring the accuracy of the test data. Attached Figure Description

[0014] Figure 1 A three-dimensional structural diagram of a transmission shaft outer diameter measuring instrument is provided for this utility model;

[0015] Figure 2A three-dimensional structural diagram of the internal structure of a transmission shaft outer diameter measuring instrument is provided for this utility model;

[0016] Figure 3 A partial top view of a transmission shaft outer diameter measuring instrument is provided for this utility model;

[0017] Figure 4 This invention presents a three-dimensional structural diagram of a laser ranging mechanism in a transmission shaft outer diameter measuring instrument.

[0018] Legend: 1. Outer shell; 2. Control panel; 3. Mounting plate; 31. Long rod; 4. Transmission mechanism; 41. Servo motor; 42. First clamping plate; 43. Lead screw; 44. Smooth rod; 45. Driving pulley; 46. Synchronous belt; 47. Driven pulley; 5. Laser ranging mechanism; 51. Connecting rod; 52. Fastening bolt; 53. Threaded block; 54. Laser ranging sensor; 6. Auxiliary positioning mechanism; 61. Second clamping plate; 62. Extension rod; 7. Electronic components. Detailed Implementation

[0019] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0020] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0021] Example 1: As Figure 1 - Figure 4As shown, this utility model provides a transmission shaft outer diameter measuring instrument, including a housing 1, a control panel 2, a mounting plate 3, a long rod 31, and electronic components 7. Multiple sets of mounting plates 3 and multiple sets of long rods 31 are vertically distributed and fixed to form a frame. The frame is divided into a left frame and a right frame. A transmission mechanism 4 and an auxiliary positioning mechanism 6 are fixedly installed inside the right frame. The transmission shaft is placed between the transmission mechanism 4 and the auxiliary positioning mechanism 6. A laser ranging mechanism 5 is connected to the middle of the transmission mechanism 4. The laser ranging mechanism 5 is located outside the transmission shaft. The laser ranging mechanism 5 includes a connecting rod 51, a fastening bolt 52, a screw block 53, and a laser ranging sensor 54. The connecting rod 51 is slidably connected to the upper side of the screw block 53. The fastening bolt 52 is threadedly connected to the screw block 53. The laser ranging sensor 54 is fixedly connected to the end of the connecting rod 51. The laser ranging sensor 54 and the transmission shaft are located on the same side. The height and laser range sensor 54 are electrically connected to the electronic device 7 via wires. The transmission mechanism 4 includes a servo motor 41, a first clamping plate 42, a lead screw 43, a smooth rod 44, a driving pulley 45, a synchronous belt 46, and a driven pulley 47. The lead screw 43 is threaded inside the lead block 53, and the smooth rod 44 is slidably connected inside the lead block 53. The two ends of the lead screw 43 are rotatably connected to the mounting plate 3 via bearings. The smooth rod 44 is fixedly connected inside the right frame. The driven pulley 47 is fixedly installed at one end of the lead screw 43. The driven pulley 47 is connected to the driving pulley 45 via the synchronous belt 46. The driving pulley 45 is fixedly installed on the output shaft of the servo motor 41. The middle part of the first clamping plate 42 is fixedly installed at the end of the output shaft of the servo motor 41. The auxiliary positioning mechanism 6 includes a second clamping plate 61 and an extension rod 62. The second clamping plate 61 and the first clamping plate 42 are coaxial.

[0022] The specific setup and function of this embodiment are described below: Three sets of mounting plates 3 are parallel to each other and spaced a certain distance apart. Multiple sets of long rods 31 are parallel to each other and pass perpendicularly through the three sets of mounting plates 3, thus forming the frame of the detector. The size of the frame can be customized according to the length of the drive shaft. The frame is divided into two parts: a left frame and a right frame. The left frame is used to install the control panel 2, electronic devices 7, and other circuit control parts, as well as the servo motor 41. The right frame is used to install the execution part of the detector. The first clamping plate 42 and the second clamping plate 61 are opened with a wrench. The two ends of the drive shaft are placed into them in sequence and then the edges of the drive shaft are locked. By controlling the control panel 2, the electronic devices 7 control the servo motor 41 to start. The servo motor 41 drives the drive pulley 45 and the first clamping plate 42 to rotate. The first clamping plate 42 drives the drive shaft to rotate. At the same time, the drive pulley 45 drives the driven pulley 47 to rotate through the synchronous belt 46, thereby driving the lead screw 43 to rotate inside the right frame with the help of the bearing. The lead screw 43 rotates inside the lead block 53 to generate a meshing force. The component of the meshing force is parallel to the smooth rod 44, thereby driving the... The wire block 53 moves along the length of the smooth rod 44. After the drive shaft is limited, it is parallel to the smooth rod 44. During the movement of the wire block 53, it drives the connecting rod 51 and the laser rangefinder 54 at its end to move horizontally. The fastening bolt 52 can be loosened according to the diameter of the drive shaft, so that the connecting rod 51 slides in the wire block 53, adjusting the distance between the laser rangefinder 54 and the drive shaft. The control panel 2 controls the laser rangefinder 54 to emit continuously modulated laser through the electronic device 7. The distance is calculated by measuring the phase difference between the emitted and reflected light. The distance between the laser rangefinder 54 and the drive shaft remains unchanged, and the rotating shaft maintains its rotation. If the outer diameter of the drive shaft is consistent, the measured distance remains unchanged during the horizontal movement of the laser rangefinder 54 within a certain error range. If the outer diameter of the drive shaft is inconsistent, the measured distance will exceed the error range in the bending or deformed area. The measurement data is processed by the electronic device 7 and displayed on the display of the control panel 2 in the form of a line graph, thereby realizing non-contact quantitative detection of the drive shaft.

[0023] Electronic component 7 mainly includes a laser driving circuit, a modulation signal generation circuit, a phase detection circuit, a signal processing circuit, and a control unit. The laser driving circuit uses a constant current source and a temperature control circuit to stabilize the laser output; the modulation signal generation circuit generates a modulation signal to drive the laser through a crystal oscillator and a phase-locked loop; the phase detection circuit compares the phase difference after photoelectric conversion, amplification, and filtering; the signal processing circuit converts the phase difference into a digital signal to calculate the distance; and the control unit coordinates all parts, processes data, and monitors the status. The cooperation of all parts enables the laser rangefinder 54 to accurately measure the outer diameter of the drive shaft based on the phase difference.

[0024] Example 2: Figure 1 - Figure 3As shown, the servo motor 41 and electronic device 7 are both fixedly installed inside the right frame, the outer shell 1 is installed outside the right frame, the control panel 2 is fixedly installed outside the outer shell 1 and electrically connected to the electronic device 7, the auxiliary positioning mechanism 6 includes a second clamping plate 61 and an extension rod 62, the second clamping plate 61 and the first clamping plate 42 are coaxial, the extension rod 62 is fixedly connected to the middle of one side of the second clamping plate 61, and the second clamping plate 61 is rotatably connected to one of the mounting plates 3 through a bearing.

[0025] The overall effect of this embodiment is that the second clamping plate 61 and the first clamping plate 42 are located on the same straight line. After the transmission shaft is connected, the extension rod 62 connected to the back side of the second clamping plate 61 rotates in one of the mounting plates 3 through the bearing, ensuring the stable rotation of the transmission shaft. The laser range sensor 54 moves horizontally to measure the outer diameter of the transmission shaft in the rotating state. Since the claws of the first clamping plate 42 and the second clamping plate 61 are the same and have a small width, when the laser range sensor 54 scans the claws of the two plates, the measured distance is a sudden change at equal intervals, rather than a gradual change during deformation. Therefore, when the laser range sensor 54 measures the edges at both ends of the transmission shaft, it has almost no effect.

[0026] The usage and working principle of this device are as follows: Use a wrench to open the first clamp 42 and the second clamp 61. Place both ends of the drive shaft into them sequentially and then lock the edges of the drive shaft. Through the control panel 2, the electronic device 7 controls the servo motor 41 to start. The servo motor 41 drives the drive pulley 45 and the first clamp 42 to rotate. Since the second clamp 61 and the first clamp 42 are on the same straight line, the first clamp 42 drives the drive shaft to rotate. Simultaneously, the drive pulley 45 drives the driven pulley 47 to rotate via the synchronous belt 46, thereby driving the lead screw 43 to rotate inside the right frame via the bearing. The lead screw 43 rotates inside the lead block 53, generating a meshing force. The component of the meshing force is parallel to the smooth rod 44, thereby driving the lead block 53 to move along the length of the smooth rod 44. After the drive shaft is limited, it moves along the light... The slide bars 44 are parallel to each other. During the movement of the wire block 53, the connecting rod 51 and the laser rangefinder 54 at its end move horizontally. The control panel 2 controls the laser rangefinder 54 to emit continuously modulated laser light through the electronic device 7. The distance is calculated by measuring the phase difference between the emitted and reflected light. The distance between the laser rangefinder 54 and the drive shaft remains unchanged, and the rotating shaft maintains its rotation. If the outer diameter of the drive shaft is consistent, the measured distance remains unchanged during the horizontal movement of the laser rangefinder 54 within a certain error range. If the outer diameter of the drive shaft is inconsistent, the measured distance will exceed the error range in the bending or deformed area. The measurement data is processed by the electronic device 7 and displayed on the display of the control panel 2, thereby realizing non-contact quantitative detection of the drive shaft.

[0027] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A transmission shaft outer diameter measuring instrument, comprising a housing (1), a control panel (2), a mounting plate (3), a long rod (31), and electronic components (7), characterized in that: Multiple sets of mounting plates (3) and multiple sets of long rods (31) are vertically distributed and fixed to form a frame. The frame is divided into a left frame and a right frame. A transmission mechanism (4) and an auxiliary positioning mechanism (6) are fixedly installed inside the right frame. The transmission shaft is placed between the transmission mechanism (4) and the auxiliary positioning mechanism (6). A laser ranging mechanism (5) is connected to the middle of the transmission mechanism (4). The laser ranging mechanism (5) is located outside the transmission shaft. The laser ranging mechanism (5) includes a connecting rod (51), a fastening bolt (52), a wire block (53), and a laser ranging sensor (54). The connecting rod (51) is slidably connected to the upper side of the wire block (53). The fastening bolt (52) is threadedly connected to the wire block (53). The laser ranging sensor (54) is fixedly connected to the end of the connecting rod (51). The laser ranging sensor (54) is at the same height as the transmission shaft. The laser ranging sensor (54) is electrically connected to the electronic device (7) through a wire.

2. The transmission shaft outer diameter measuring instrument according to claim 1, characterized in that: The transmission mechanism (4) includes a servo motor (41), a first chuck (42), a lead screw (43), a smooth rod (44), a driving pulley (45), a synchronous belt (46), and a driven pulley (47). The lead screw (43) is threadedly connected to the inside of the lead block (53), and the smooth rod (44) is slidably connected to the inside of the lead block (53).

3. The transmission shaft outer diameter measuring instrument according to claim 2, characterized in that: The two ends of the lead screw (43) are rotatably connected to the mounting plate (3) through bearings, the smooth rod (44) is fixedly connected inside the right frame, and the driven pulley (47) is fixedly installed at one end of the lead screw (43).

4. The transmission shaft outer diameter measuring instrument according to claim 3, characterized in that: The driven pulley (47) is connected to the driving pulley (45) via a synchronous belt (46). The driving pulley (45) is fixedly installed on the output shaft of the servo motor (41). The middle part of the first chuck (42) is fixedly installed at the end of the output shaft of the servo motor (41).

5. A transmission shaft outer diameter measuring instrument according to claim 4, characterized in that: The servo motor (41) and the electronic device (7) are both fixedly installed inside the right frame, the outer shell (1) is installed outside the right frame, and the control panel (2) is fixedly installed outside the outer shell (1) and electrically connected to the electronic device (7).

6. The transmission shaft outer diameter measuring instrument according to claim 5, characterized in that: The auxiliary positioning mechanism (6) includes a second clamping plate (61) and an extension rod (62). The second clamping plate (61) and the first clamping plate (42) are coaxial. The extension rod (62) is fixedly connected to the middle of one side of the second clamping plate (61). The second clamping plate (61) is rotatably connected to one of the mounting plates (3) through a bearing.

Images