Electric drive axle shaft height detection machine

Abstract

This utility model discloses an electric drive axle transmission shaft height detection machine, including a support base and a motor to be tested. The support base has a bracket structure on its top, and a transmission structure extending through the bottom of the bracket structure on one side of the support base. A product placement rack is slidably mounted on the top of the transmission structure. A lifting drive structure is located on the top of the bracket structure, and a lifting detection structure is driven at the bottom of the lifting drive structure. A calibration mechanism is located on one side of the support base, and a measuring mechanism is located at the bottom of the lifting detection structure. The advantages of this utility model compared to existing technologies are: 1. Strong compatibility: It can quickly adapt to electric drive axle transmission shafts of different models and shaft positions via a cross slide table; 2. High detection accuracy: Equipped with three measuring sensors to synchronously collect shaft height data; an elastic floating structure offsets the influence; 3. High degree of automation; 4. Meets production line cycle time: Fully automated operation, with real-time collection of torque, pressure, and height data during measurement.

Description

Technical Field

[0001] This utility model relates to the field of electric drive axle drive shaft height measurement technology, specifically to an electric drive axle drive shaft height detection machine. Background Technology

[0002] The new energy three-in-one system includes a motor, reducer, and controller. The motor is the power source of new energy vehicles, converting electrical energy into mechanical energy to drive the vehicle. It is an indispensable part of the transmission. The shaft height measurement process of the motor is an extremely important step. As electric drive assemblies develop towards higher integration and higher power density, the three-in-one system has become the mainstream technology route in the industry. Its shaft accuracy directly affects the system's NVH performance, transmission efficiency, and reliability. Therefore, it also puts forward higher requirements for automated shaft height measurement equipment.

[0003] Previously, this equipment was mostly a dedicated machine. Due to product and equipment structure limitations, it suffered from insufficient compatibility and its cycle time did not meet production line requirements, clearly failing to meet current customer needs. To improve product pressing quality, enhance product compatibility, and meet customer cycle time requirements, this equipment features an automatically repositioning measuring mechanism to accommodate different products. The measurement process includes real-time torque monitoring, pressure monitoring, and dynamic measurement, simulating actual operating conditions to obtain accurate process data. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an electric drive axle transmission shaft height detection machine, addressing the shortcomings mentioned in the background art.

[0005] To solve the above technical problems, the technical solution provided by this utility model is as follows: an electric drive axle transmission shaft height detection machine, including a support base and a motor to be tested. The support base is provided with a bracket structure at the top, and a transmission structure penetrating the bottom of the bracket structure is provided on one side of the support base. A product placement rack is provided at the top of the transmission structure with a limit sliding. A lifting drive structure is provided at the top of the bracket structure, and a lifting detection structure is driven at the bottom of the lifting drive structure. A calibration mechanism is provided on one side of the support base. The lifting detection structure includes a lifting plate, a longitudinal driving structure on one side of the lifting plate, a longitudinal moving plate driven by the longitudinal driving structure, a transverse driving structure on one side of the bottom of the longitudinal moving plate, a transverse moving plate driven by the transverse driving structure, and a measuring mechanism at the bottom of the transverse moving plate. The measuring mechanism includes an upper support plate and a lower detection frame. The upper support plate is rotatably equipped with a measuring structure that extends to the lower detection frame and is connected to the motor under test. The top of the upper support plate is equipped with a servo motor and a torque sensor to drive the measuring structure to rotate. The lower inspection frame is equipped with a cylinder-driven product clamping and lifting mechanism on its outer bottom, and the bottom of the lower inspection frame is equipped with a product positioning and inspection structure and a product leveling structure.

[0006] Furthermore, the lifting drive structure ensures the support of the top plate, and the top of the support top plate is equipped with a lifting machine and a servo reducer for driving the lifting detection structure to move up and down. The two sides of the support top plate are equipped with balance cylinders connected to the top of the lifting detection structure.

[0007] Furthermore, the bottom of the transmission structure is provided with a positioning and lifting structure directly below the lifting drive structure. The positioning and lifting structure includes a bottom lifting electric cylinder and a lifting plate that cooperates with the product placement rack for positioning.

[0008] Furthermore, a servo cylinder is installed at the top of the upper support plate above the measuring structure, and a pressure sensor is installed at the bottom power end of the servo cylinder. The measuring structure includes a bottom drive product head, and multiple measuring sensors are installed above the drive product head. Furthermore, multiple elastic floating structures are provided between the top of the upper support plate and the bottom of the transverse moving plate.

[0009] Furthermore, the bottom of the lifting plate is provided with a first limiting guide rail structure that cooperates with the longitudinal moving plate to move stably, and the bottom of the longitudinal moving plate is provided with a second limiting guide rail structure that cooperates with the transverse moving plate to move stably.

[0010] Furthermore, the calibration mechanism includes a calibration frame, the top of which is laterally limited and slidably equipped with a large-value calibration component and a small-value calibration component of a lateral alignment and lifting detection structure, and the calibration frame is equipped with a displacement cylinder for driving the large-value calibration component and the small-value calibration component.

[0011] The advantages of the electric drive axle transmission shaft height detection machine of this invention compared with the prior art are as follows: 1. Strong compatibility: The "cross slide" composed of longitudinal and transverse drive structures enables the measuring mechanism to move arbitrarily on the horizontal plane, and can quickly adapt to electric drive axle transmission shafts of different models and shaft positions without the need to change special fixtures, greatly reducing product changeover time. 2. High detection accuracy: Equipped with 3 measuring sensors to simultaneously collect shaft height data, reducing single-point measurement errors; The elastic floating structure enables a flexible connection between the measuring mechanism and the equipment, offsetting the impact of system vibration and installation errors on the measurement results. The product leveling structure monitors the deformation of the product positioning surface in real time, and the product positioning detection structure ensures accurate positioning, further reducing measurement deviation. The calibration organization regularly calibrates the upper and lower limits of the measurement system to ensure long-term stable measurement accuracy. 3. High degree of automation: The transmission structure enables automatic feeding and unloading of the motor under test, while the positioning and lifting structure enables automatic positioning of the measurement station. The lifting drive structure and the longitudinal / lateral drive structure work together to realize the automatic lifting and displacement of the measuring mechanism without manual intervention; The servo motor, torque sensor, servo cylinder, and pressure sensor work together to achieve real-time monitoring and automatic adjustment of speed, torque, and pressure, simulating the actual working conditions of the drive shaft. 4. Meets production line cycle time: The fully automated operation reduces manual intervention and significantly improves testing efficiency, matching the high-cycle production needs of modern production lines; at the same time, real-time data collection of torque, pressure, height, etc. during the measurement process can quickly determine whether the product is qualified, avoid subsequent rework and waste, and further improve the overall efficiency of the production line. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the first structure of an electric drive axle transmission shaft height detection machine.

[0013] Figure 2 This is a schematic diagram of the second structure of an electric drive axle transmission shaft height detection machine.

[0014] Figure 3 This is a schematic diagram of the third structure of an electric drive axle transmission shaft height detection machine.

[0015] Figure 4 This is a schematic diagram of the cross slide structure of an electric drive axle transmission shaft height detection machine.

[0016] Figure 5 This is a schematic diagram of the first structure of the measuring mechanism of an electric drive axle transmission shaft height detection machine.

[0017] Figure 6 This is a schematic diagram of the second structure of the measuring mechanism of an electric drive axle transmission shaft height detection machine.

[0018] Figure 7 This is a schematic diagram of the measurement position of an electric drive axle transmission shaft height detection machine.

[0019] As shown in the figure: 1. Support base; 2. Bracket structure; 3. Transmission structure; 4. Product placement rack; 5. Lifting drive structure; 5-1. Lifting machine; 5-2. Servo reducer; 5-3. Balance cylinder; 6. Lifting detection structure; 6-1. Lifting plate; 6-2. Longitudinal drive structure; 6-3. Longitudinal moving plate; 6-4. Lateral drive structure; 6-5. Lateral moving plate; 6-6. First limit guide rail structure; 6-7. Second limit guide rail structure; 7. Measuring mechanism; 7-1. Upper support plate; 7-2. Lower support plate; 7-3. Detection frame; 7-4. Servo motor; 7-5. Servo cylinder; 7-6. Torque sensor; 7-7. Pressure sensor; 7-8. Measurement structure; 7-9. Cylinder product clamping and lifting mechanism; 7-10. Product positioning detection structure; 7-11. Product leveling structure; 7-12. Elastic floating structure; 8. Calibration mechanism; 8-1. Calibration frame; 8-2. Positioning cylinder; 8-3. Small value calibration component; 8-4. Large value calibration component; 9. Positioning and lifting structure; 9-1. Bottom lifting electric cylinder; 9-2. Lifting plate. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings.

[0021] Combined with appendix Figure 1-7 An electric drive axle transmission shaft height detection machine includes a support base 1 and a motor to be tested. The support base 1 has a bracket structure 2 on its top and a transmission structure 3 that penetrates the bottom of the bracket structure 2 on one side of the support base 1. A product placement rack 4 is slidably mounted on the top of the transmission structure 3, as shown in the figure. The transmission structure 3 is a roller-type transmission structure that can limit the lateral sliding of the product placement rack 4. The product placement rack 4 has a fixing component that can fix and position the motor to be tested. This is a common structure and will not be described in detail. The bracket structure 2 has a lifting drive structure 5 on its top and a lifting detection structure 6 driven at the bottom of the lifting drive structure 5. A calibration mechanism 8 is provided on one side of the support base 1.

[0022] The lifting detection structure 6 includes a lifting plate 6-1. A longitudinal drive structure 6-2 is provided on one side of the lifting plate 6-1. The longitudinal drive structure 6-2 longitudinally drives a longitudinal moving plate 6-3. A transverse drive structure 6-4 is provided on one side of the bottom of the longitudinal moving plate 6-3. The transverse drive structure 6-4 laterally drives a transverse moving plate 6-5. A measuring mechanism 7 is provided at the bottom of the transverse moving plate 6-5. Both the longitudinal drive structure 6-2 and the transverse drive structure 6-4 are driven by a motor that drives a lead screw to rotate. The lead screw interacts with the longitudinal moving plate 6-3 and the transverse moving plate 6-5. The threaded connection enables horizontal and vertical movement, requiring high precision in the lead screw. The bottom of the lifting plate 6-1 is equipped with a first limiting guide rail structure 6-6 to facilitate stable movement of the vertical moving plate 6-3, and the bottom of the vertical moving plate 6-3 is equipped with a second limiting guide rail structure 6-7 to facilitate stable movement of the horizontal moving plate 6-5. Through the limiting guide rail structure, the stable movement of the vertical moving plate 6-3 and the horizontal moving plate 6-5 can be guaranteed. That is, the vertical moving plate 6-3 and the horizontal moving plate 6-5 form a cross slide, which serves as the overall displacement of the measuring mechanism to accommodate the shaft positions of different products.

[0023] The measuring mechanism 7 includes an upper support plate 7-1 and a lower detection frame 7-2. The upper support plate 7-1 has a rotatable measuring structure 7-7 extending below the lower detection frame 7-2 and connected to the motor under test. The top of the upper support plate 7-1 has a servo motor 7-3 and a torque sensor 7-5 that drive the measuring structure 7-7 to rotate. A servo cylinder 7-4 is located above the measuring structure 7-7 on the top of the upper support plate 7-1. A pressure sensor 7-6 is located at the bottom power end of the servo cylinder 7-4. The measuring structure 7-7 includes a bottom drive head connected to a motor. The servo motor 7-3, in conjunction with a synchronous transmission structure as shown, drives the measuring structure 7-7 to rotate. The torque sensor 7-5, in conjunction with the motor speed and torque, can measure the rotation of the product shaft system. The measuring structure 7-7 has multiple measuring sensors located above the drive head. Typically, three measuring sensors are used, and these are high-precision contact digital sensors. When the motor under test is successfully positioned, the three measuring sensors can perform contact measurement of the corresponding shaft height, mainly measuring... Figure 7 The axis heights of the two surfaces shown.

[0024] The lower testing frame 7-2 has a cylinder-driven product clamping and lifting mechanism 7-8 on its outer bottom, as shown in the figure. The cylinder-driven product clamping and lifting mechanism 7-8 is a hinged gripper that can be activated by multiple cylinder-driven product clamping and lifting mechanisms 7-8 to raise the motor under test. The lower testing frame 7-2 has a product positioning and detection structure 7-9 and a product leveling structure 7-10 at its bottom. Multiple elastic floating structures 7-11 are provided between the top of the upper support plate 7-1 and the bottom of the transverse moving plate 6-5. The function of the elastic floating structure 7-11 is to allow the measuring mechanism to be flexibly connected to the equipment so as to minimize the impact of the equipment system error on the measurement result during the measurement process, as shown in the figure. The lifting plate 6-1, the longitudinal moving plate 6-3 and the transverse moving plate 6-5 all have a middle opening in the middle of the measuring structure 7-7, which is the driving structure, to facilitate displacement operation.

[0025] The lifting drive structure 5 ensures the support of the top plate. The top of the support top plate is equipped with a lifting machine 5-1 and a servo reducer 5-2 that drive the lifting detection structure 6 to lift. The two sides of the support top plate are equipped with balance cylinders 5-3 connected to the top of the lifting detection structure 6. The balance cylinders 5-3 can ensure the stable lifting operation of the lifting detection structure 6.

[0026] The bottom of the transmission structure 3 is located directly below the lifting drive structure 5 and is equipped with a positioning and lifting structure 9. The positioning and lifting structure 9 includes a bottom lifting electric cylinder 9-1 and a lifting plate 9-2 that is positioned and cooperates with the product placement rack 4. The lifting plate 9-2 is a positioning setting. The top of the lifting plate 9-2 and the bottom of the product placement rack 4 are equipped with corresponding positioning structures. The lifting electric cylinder 9-1 drives the lifting plate 9-2 to rise, which can ensure the positioning and lifting of the motor under test at the top of the product placement rack 4.

[0027] The calibration frame 8-1 includes a large-value calibration component 8-4 and a small-value calibration component 8-3 with a lateral alignment and lifting detection structure 6 at its top, which are laterally limited and slidable. The calibration frame 8-1 is equipped with a displacement cylinder 8-2 for driving the large-value calibration component 8-4 and the small-value calibration component 8-3. Figure 2 As shown, the calibration components on the top of the large value calibration component 8-4 and the small value calibration component 8-3 are manually aligned and adjusted according to the model of the motor under test, which facilitates the automated calibration of the equipment.

[0028] Implementation steps Step 1: Equipment Initialization and Calibration After the equipment is powered on, a system self-test is first performed to confirm that each structure (lifting drive structure 5, longitudinal drive structure 6-2, lateral drive structure 6-4, etc.) is operating normally. The calibration mechanism 8 is activated, the displacement cylinder 8-2 drives the small value calibration component 8-3 to move directly below the lifting detection structure 6, the lifting drive structure 5 drives the lifting detection structure 6 to descend, and the measuring sensor 7-7 of the measuring mechanism 7 collects the height data of the small value calibration component 8-3 to complete the lower limit calibration. The displacement cylinder 8-2 drives the small value calibration component 8-3 to reset, and at the same time drives the large value calibration component 8-4 to move to the measurement position. The above lifting and measurement steps are repeated to complete the upper limit calibration. The calibration data is automatically stored in the system for subsequent measurement data calibration.

[0029] Step 2: Loading and positioning the motor to be tested The operator fixes the motor to be tested on the positioning part of the product placement rack 4, and drives the product placement rack 4 to move along the roller conveyor through the transmission structure 3. When it moves to the position directly below the lifting drive structure 5 (measuring station), the transmission structure 3 stops. When the positioning and lifting structure 9 is activated, the bottom lifting electric cylinder 9-1 drives the lifting plate 9-2 to rise. The lifting plate 9-2 is precisely connected to the bottom of the product placement rack 4 through the top positioning structure, which drives the product placement rack 4 and the motor under test to rise synchronously to the set measurement height, thereby achieving the positioning of the motor under test.

[0030] Step 3: Measurement mechanism displacement and docking According to the model of the motor under test, the system calls the preset parameters. The longitudinal drive structure 6-2 drives the longitudinal moving plate 6-3 to move longitudinally along the first limit guide rail structure 6-6, and the transverse drive structure 6-4 drives the transverse moving plate 6-5 to move laterally along the second limit guide rail structure 6-7, thereby moving the measuring mechanism 7 to directly above the shaft system of the motor under test. The lifting drive structure 5 is activated, and the lifting platform 6-1 and the servo reducer 5-2 work together to drive the lifting plate 6-1 to descend. The balance cylinder 5-3 moves synchronously to ensure a smooth lifting process. During the descent, the lower detection frame 7-2 of the measuring mechanism 7 first approaches the motor under test. The product positioning detection structure 7-9 uses pneumatic detection to confirm whether the motor under test is close to the positioning column and flat. If it is not close, the system alarms and prompts for adjustment. If the positioning is qualified, it continues to descend to the set position.

[0031] Step 3: Operating Condition Simulation and Parameter Monitoring When the cylinder-driven product clamping and lifting mechanism 7-8 is activated, the clamping claws are driven by the cylinder to clamp the motor under test and lift it slightly, so that the motor under test is removed from the product placement rack 4 to avoid interference from the tray; at the same time, the clamping mechanism applies a set pressure to press the motor under test into the positioning position. Servo cylinder 7-4 is activated, and pressure value is monitored by pressure sensor 7-6 to set pressure to press the drive product head of measuring structure 7-7 against the shaft of the motor under test; When the servo motor 7-3 starts, it drives the measuring structure 7-7 and the shaft system of the motor under test to rotate at a set speed through the synchronous transmission structure. The torque sensor 7-5 monitors the output torque in real time to ensure that the shaft rotation conforms to the actual working conditions. If the torque exceeds the set range, the system will automatically stop and alarm.

[0032] Step 4: Height Measurement and Data Processing During the rotation of the shaft system, three measuring sensors 7-7 simultaneously collect the height data of the key surfaces of the shaft system of the motor under test; The system processes the collected data, removes outliers, calculates the average value, and combines it with the calibration data from the initialization phase to obtain the actual height value of the motor shaft system under test. The product leveling structure 7-10 collects the deformation data of the positioning surface of the motor under test in real time. If the deformation exceeds the set threshold, the system automatically marks the measurement data as invalid and prompts for remeasurement. If the deformation is qualified, the final measurement result is compared with the preset qualified range to determine whether the motor under test is qualified.

[0033] Step 5: Measurement completed and material unloading After the measurement is completed, the servo motor 7-3 stops rotating, the servo cylinder 7-4 depressurizes and resets, and the cylinder product clamping and lifting mechanism 7-8 releases the motor under test. The lifting drive structure 5 drives the lifting detection structure 6 to rise and reset, and the longitudinal / lateral drive structure drives the measuring mechanism 7 to move to the initial position. The bottom lifting electric cylinder 9-1 of the positioning and lifting structure 9 drives the lifting plate 9-2 to descend, and the product placement rack 4 falls back onto the transmission structure 3; The transmission structure 3 moves the product placement rack 4 and the motor under test to the unloading station. The operator removes the motor under test, completing one testing cycle.

[0034] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. An electric drive axle shaft height detection machine, comprising a support base (1) and a motor to be detected, characterized in that: The support base (1) is provided with a bracket structure (2) at the top, and a transmission structure (3) that penetrates the bottom of the bracket structure (2) is provided on one side of the support base (1). A product placement rack (4) is provided at the top of the transmission structure (3) with a limit sliding. A lifting drive structure (5) is provided at the top of the bracket structure (2). A lifting detection structure (6) is provided at the bottom of the lifting drive structure (5). A calibration mechanism (8) is provided on one side of the support base (1). The lifting detection structure (6) includes a lifting plate (6-1), a longitudinal driving structure (6-2) is provided on one side of the lifting plate (6-1), a longitudinal moving plate (6-3) is provided in the longitudinal driving structure (6-2), a transverse driving structure (6-4) is provided on one side of the bottom of the longitudinal moving plate (6-3), a transverse moving plate (6-5) is provided in the transverse driving structure (6-4), and a measuring mechanism (7) is provided at the bottom of the transverse moving plate (6-5). The measuring mechanism (7) includes an upper support plate (7-1) and a lower detection frame (7-2). The upper support plate (7-1) is rotatably provided with a measuring structure (7-7) extending below the lower detection frame (7-2) and connected to the motor under test. The top of the upper support plate (7-1) is provided with a servo motor (7-3) and a torque sensor (7-5) for driving the measuring structure (7-7) to rotate. The lower inspection frame (7-2) is provided with a cylinder product clamping and lifting mechanism (7-8) on the outer side of its bottom, and the lower inspection frame (7-2) is provided with a product positioning and inspection structure (7-9) and a product leveling structure (7-10) at its bottom.

2. The electric drive axle shaft height detection machine according to claim 1, characterized in that: The lifting drive structure (5) ensures the support of the top plate. The top of the support top plate is provided with a lift (5-1) and a servo reducer (5-2) for driving the lifting detection structure (6) to lift. The two sides of the support top plate are provided with balance cylinders (5-3) connected to the top of the lifting detection structure (6).

3. The electric drive axle shaft height detection machine according to claim 1, characterized in that: The bottom of the transmission structure (3) is located directly below the lifting drive structure (5) and is equipped with a positioning and lifting structure (9). The positioning and lifting structure (9) includes a bottom lifting electric cylinder (9-1) and a lifting plate (9-2) that is positioned and cooperates with the product placement rack (4).

4. The electric drive axle shaft height detection machine according to claim 1, characterized in that: The upper support plate (7-1) is equipped with a servo cylinder (7-4) at the top above the measuring structure (7-7). The servo cylinder (7-4) is equipped with a pressure sensor (7-6) at the bottom power end. The measuring structure (7-7) includes a bottom drive product head. The measuring structure (7-7) is equipped with multiple measuring sensors above the drive product head.

5. An electric drive axle shaft height detection machine according to claim 1, characterized in that: Multiple elastic floating structures (7-11) are provided between the top of the upper support plate (7-1) and the bottom of the transverse moving plate (6-5).

6. An electric drive axle shaft height detection machine according to claim 1, characterized in that: The bottom of the lifting plate (6-1) is provided with a first limiting guide rail structure (6-6) that cooperates with the longitudinal moving plate (6-3) to move stably, and the bottom of the longitudinal moving plate (6-3) is provided with a second limiting guide rail structure (6-7) that cooperates with the transverse moving plate (6-5) to move stably.

7. An electric drive axle shaft height detection machine according to claim 1, characterized in that: The calibration mechanism (8) includes a calibration frame (8-1), the top of the calibration frame (8-1) is laterally limited and slidably provided with a large value calibration component (8-4) and a small value calibration component (8-3) of the lateral alignment lifting detection structure (6), and the calibration frame (8-1) is provided with a displacement cylinder (8-2) for driving the large value calibration component (8-4) and the small value calibration component (8-3).

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