Semi-automatic assembling and detecting production line for automotive brake

Abstract

The invention relates to a semi-automatic assembling and detecting production line for an automobile brake, and relates to the technical field of automobile part assembling and detecting. Comprising a disc jump detection module, an overturning module, a pre-tightening code scanning and labeling module, a visual detection module and a torque detection module which are arranged in sequence, the torque detection module comprises a mounting table, a test table board, a test mechanism and the like, the test mechanism is provided with a servo motor, a connecting plug, a torque sensor and the like, and the test mechanism is further provided with a mounting assembly, a deformation feedback assembly, a sliding assembly and the like. The device achieves the technical effects of semi-automatic assembly detection of the automotive brake, accurate torque detection, convenient installation and fixation of the automotive brake, effective feedback of the deformation condition of the brake disc, and the like.

Description

Technical Field

[0001] The present application relates to the technical field of automobile component assembly and testing, and in particular to a semi-automatic assembly and testing production line for automobile brakes. Background Art

[0002] The automotive industry has achieved remarkable success over the years. As a vital means of transportation in modern society, automobile safety is a key concern. Automotive brakes, as key components for driving safety, play a vital role in vehicle operation. With the continuous increase in vehicle production, the requirements for brake production efficiency, quality, and performance are also becoming increasingly stringent. The development of automotive brake-related technologies is crucial for improving overall vehicle performance and safety.

[0003] In the traditional automobile brake production process, the assembly and testing of brakes mainly rely on manual operations. Usually, workers use tools such as electric drills to manually assemble the brakes according to process requirements. Due to the heavy weight of the brakes, lifting equipment is often required to assist in handling and installation during the assembly process. After assembly, the products need to be sent to the quality inspection department for testing of data such as torque. When testing data such as torque, the existing technology lacks effective equipment for the detection of torque data, resulting in low detection efficiency of the existing technology, or even no testing is performed, and the strength of the brake is ensured by relying solely on the strength accumulation of the material. It is impossible to provide technicians with scientific and reasonable torque values ​​for the brake, which hinders the optimization of the material cost of the brake, resulting in high production costs of the product. In severe cases, the brake product may be damaged during use. Summary of the Invention

[0004] In order to solve the above problems, the present application provides a semi-automatic assembly and testing production line for automobile brakes.

[0005] A semi-automatic assembly and inspection production line for automobile brakes, comprising a disc jump detection module, a flip module, a pre-tightening code scanning and labeling module, a visual inspection module, and a torque detection module, which are arranged in sequence. The torque detection module comprises a mounting platform, on which a test table is provided, and the test table is mounted on the mounting platform via a sliding assembly; a testing mechanism is provided on the test table, and the testing mechanism comprises a servo motor and a plug connector, the servo motor being controlled by a switch button arranged on the mounting platform, the plug connector being used for installing automobile brakes, and a torque sensor for detecting torque being installed between the servo motor and the plug connector, and test shafts being provided at both ends of the torque sensor.

[0006] By adopting the above technical solution, the production line can perform disc jump detection, flipping, pre-tightening scanning and labeling, visual inspection and torque inspection on automobile brakes in sequence, realizing a semi-automatic assembly and inspection process; the test table can slide on the mounting table through the sliding component to facilitate position adjustment; the servo motor is used to drive the plug connector to drive the movement of the automobile brake, and the torque is detected in real time through the torque sensor. The servo motor can also be controlled by the switch button, so that torque testing can be carried out flexibly.

[0007] Preferably, the plug connector includes a central rotating shaft connected to the coupling, a sleeve is fixed on the central rotating shaft, and a plurality of transmission claws are fixedly installed on the circumference of the sleeve at annular intervals.

[0008] By adopting the above technical solution, the central rotating shaft of the plug connector is connected to the coupling, and the transmission claws on the peripheral side of the sleeve on the central rotating shaft are plugged into and installed with the brake disc of the automobile brake, thereby achieving a stable connection between the automobile brake and the testing mechanism, facilitating accurate torque detection of the automobile brake.

[0009] Preferably, a centering block is fixedly mounted on the end of the central rotating shaft. The centering block is configured to be truncated cone-shaped with the narrow end facing the automobile brake. Several elastic members are mounted on the surface of the centering block.

[0010] By adopting the above technical solution, a centering block is arranged to be plugged into and installed on the brake disc, which can play a positioning role for the brake disc; the centering block with a frustum shape and a narrow end facing the car brake is convenient for inserting into the brake disc, reducing the difficulty of installation; the elastic part on the surface of the centering block can buffer the impact force during installation, avoid damage to the brake disc, and ensure the stability of the connection between the brake disc and the plug connector.

[0011] Preferably, the servo motor includes a motor shaft, and the motor shaft, test shaft and central rotating shaft are connected by a coupling; a support plate for supporting the motor shaft and the central rotating shaft is also fixedly provided on the test table, so that the motor shaft, test shaft and central rotating shaft are located on the same axis.

[0012] By adopting the above technical solution, the coupling realizes the connection between the motor shaft, test shaft and center rotating shaft, so that power is transmitted from the servo motor to the plug connector to drive the brake disc of the automobile brake to rotate, which is convenient for torque testing; the support plate supports the motor shaft and the center rotating shaft, so that the motor shaft, test shaft and center rotating shaft are located on the same axis, which can reduce vibration and wear caused by shaft misalignment and ensure the stability and accuracy of the test process.

[0013] Preferably, the mounting platform is also provided with a mounting assembly for fixing the automobile brake, the mounting assembly includes a plurality of positioning pillars, the top of the positioning pillars is provided with positioning bosses, and the automobile brake is installed through the positioning bosses; the mounting assembly also includes a pressure cover, the pressure cover is provided with a fixing card hole, the positioning boss is plugged into the fixing card hole, and the pressure cover is also connected to a wrench, and the pressure cover can be pressed on the positioning pillar by flipping the wrench to realize the opening and closing function of the pressure cover.

[0014] By adopting the above technical solution, the positioning boss on the top of the positioning pillar can accurately install the automobile brake and ensure the installation position accuracy; the fixing card hole of the pressure cover is plugged into the positioning boss, and then the pressure cover is pressed on the positioning pillar by flipping the wrench, which can effectively fix the automobile brake, improve the installation stability, and avoid the brake displacement during the detection process affecting the detection results.

[0015] Preferably, the testing mechanism also includes a deformation feedback component, which includes a testing arm, which is arranged in the rotation direction of the automobile brake disc. An angle sensor is provided at one end of the testing arm away from the automobile brake, and the rotating shaft of the angle sensor is connected to the testing arm.

[0016] By adopting the above technical solution, a deformation feedback component is set in the test mechanism, and the test arm is set in the rotation direction of the brake disc. When the brake disc rotates and generates deformation, it will drive the test arm to rotate. The angle sensor can detect the rotation angle of the test arm, thereby obtaining relevant data on the deformation of the brake disc caused by force under different rotation conditions, which helps to more comprehensively detect the working conditions of the automobile brake under different working conditions, especially the performance under extreme working conditions.

[0017] Preferably, the deformation feedback assembly further comprises a movable plate arranged below the test arm, the angle sensor is mounted on the movable plate, an arc groove is provided on the movable plate, a support column is provided at the bottom of the test arm and is inserted into the arc groove.

[0018] By adopting the above technical solution, the semi-automatic assembly and inspection production line for automobile brakes has the functions of disc jump detection, flipping, pre-tightening code scanning and labeling, visual inspection and torque detection arranged in sequence. The test table in the torque detection module is slidable, and can install automobile brakes and perform torque detection; the plug connector is plugged into the brake disc of the automobile brake for transmission; the arc groove on the movable plate in the deformation feedback component cooperates with the support column at the bottom of the test arm, which allows the test arm to move within a specific range, making it easier to use the angle sensor to detect the deformation of the automobile brake disc during rotation, so as to better detect the brake performance.

[0019] Preferably, a positioning magnetic block is installed in the center of the bottom of the arc groove, and the support column is set to a magnetic material. The support column can be adsorbed by the positioning magnetic block and centered in the arc groove.

[0020] By adopting the above technical solution, in the torque detection module of the semi-automatic assembly and testing production line of automobile brakes, the positioning magnet block uses the adsorption effect of the magnetic material support column to center the support column in the arc groove, ensuring that the test arm is in the appropriate position, thereby more accurately detecting the relevant parameters of the brake disc rotation under different working conditions of the automobile brake, and improving the accuracy of the test results.

[0021] Preferably, an extension plate is provided below the movable plate, two sliding shafts are oppositely mounted on the extension plate, guide rail locking blocks are slidably mounted on the sliding shafts, and the movable plate is mounted on the guide rail locking blocks and can move along the sliding shafts.

[0022] By adopting the above technical solution, the movable plate can move along the sliding axis, providing flexible movement capabilities for the deformation feedback component. The position of the movable plate can be adjusted according to test requirements, thereby better adapting to the testing of automobile brakes of different sizes or working conditions, thereby improving the adaptability and flexibility of the test.

[0023] Preferably, the sliding assembly includes a fixed base plate, a slide rail is provided on the fixed base plate, the test table is movably mounted on the slide rail via a slider, and a propulsion cylinder for driving the slider to move is also provided on the side of the fixed base plate.

[0024] By adopting the above technical solution, a sliding assembly including a fixed base plate, a slide rail, a slider and a propulsion cylinder is set up, which can make the test table slide along the slide rail, making it easy to adjust the position of the test table and facilitate the testing of automobile brakes.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. Use semi-automatic assembly and testing production lines to avoid manual installation, improve the installation accuracy of automobile brakes, and reduce installation errors caused by human errors; 2. The servo motor in the torque detection module is controlled by a switch button, which can drive the plug connector and the vehicle brake to work. In conjunction with the torque sensor, it can detect the torque of the vehicle brake at different speeds, meeting the needs of torque testing at various speeds; 3. The setting of the deformation feedback component can detect the working efficiency of the brake under extreme working conditions and ensure the quality of the automobile brake. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a three-dimensional view of the torque detection module; Figure 2 It is a three-dimensional view of the specific structure of the test mechanism; Figure 3 It is a three-dimensional view of the specific structure of the plug connector; Figure 4It is a three-dimensional view of the specific structure of the plug connector and the installation component; Figure 5 It is a three-dimensional cross-sectional view of the specific structure of the deformation feedback component; Figure 6 This is a schematic diagram of the semi-automatic assembly and testing production line for automobile brakes.

[0027] Explanation of reference numerals: 1. disk jump detection module; 2. flip module; 3. pre-tightening code scanning and labeling module; 4. visual inspection module; 5. torque detection module; 50. mounting platform; 51. positioning pillar; 511. positioning boss; 52. wrench; 521. pressure cover; 53. fixing hole; 61. fixing base plate; 62. slide rail; 63. slide block; 64. propulsion cylinder; 71. test table; 72. servo motor; 73. motor shaft; 7 4. Plug connector; 75. Center shaft; 76. Sleeve; 77. Transmission claw; 78. Centering block; 79. Elastic member; 80. Torque sensor; 81. Coupling; 82. Test shaft; 83. Test arm; 831. Support column; 84. Angle sensor; 85. Movable plate; 86. Arc groove; 87. Positioning magnet; 88. Extension plate; 89. Sliding shaft; 891. Guide rail locking block; 90. Support plate; 901. Switch button. DETAILED DESCRIPTION

[0028] The present application is further described in detail below with reference to the accompanying drawings.

[0029] In the description of the invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the invention.

[0030] The embodiment of the present application discloses a semi-automatic assembly and testing production line for automobile brakes, referring to Figure 6The semi-automatic assembly and inspection production line for automobile brakes provided in the embodiment of the present application includes a disc jump detection module 1, a flip module 2, a pre-tightening code scanning and labeling module 3, a visual inspection module 4, and a torque detection module 5, which are arranged in sequence. After the operator assembles the wheel hub bearing and the brake disc, the next step is to enter the disc jump detection. The disc jump detection module 1 is used to perform a jump test on the automobile brake disc. After the test, the product is flipped 180 degrees by the flip module 2. The operator manually assembles the fender and steering knuckle and pre-tightens the bolts therein. Then, the operator goes to the pre-tightening code scanning and labeling module 3 along the assembly line to mark the workpiece that has been locked in the previous step and pre-tighten the new bolts. After the locked product is inspected by the visual inspection module 4, if there is no defect in appearance, the unloading robot arm will transfer the product to the torque detection module 5 for torque detection. The sequential arrangement of each module enables the automobile brake to be assembled and inspected according to the process, thereby improving production efficiency and quality.

[0031] Reference Figure 1 、 Figure 2 and Figure 3 The torque detection module 5 includes a mounting platform 50, on which a test table 71 is provided. The test table 71 is mounted on the mounting platform 50 through a sliding assembly. The sliding assembly includes a fixed base plate 61, on which a slide rail 62 is provided. The test table 71 is movably mounted on the slide rail 62 through a slider 63. The cooperation between the slider 63 and the slide rail 62 enables the test table 71 to move smoothly. A propulsion cylinder 64 for driving the slider 63 to move is also provided on the side of the fixed base plate 61. The propulsion cylinder 64 can provide power for the movement of the test table 71. The test table 71 is mounted on the mounting platform 50 through the sliding assembly, which makes it easy to adjust the position of the test table 71. During testing, the test table 71 is driven by the propulsion cylinder 64 to move toward the vehicle brake so as to better detect the vehicle brake.

[0032] Reference Figure 3 and Figure 4A test mechanism is provided on the test table 71. The test mechanism includes a servo motor 72 and a plug connector 74. The servo motor 72 is controlled by a switch button 901 provided on the mounting table 50. The switch button 901 can facilitate the operator to control the start and stop of the servo motor 72. The plug connector 74 is used to install the automobile brake. A torque sensor 80 for detecting torque is installed between the servo motor 72 and the plug connector 74. Test shafts 82 are provided at both ends of the torque sensor 80. The plug connector 74 includes a central rotating shaft 75 connected to the coupling 81. A sleeve 76 is fixed on the central rotating shaft 75. A plurality of transmission claws 77 are fixedly installed on the circumference of the sleeve 76 at annular intervals. The transmission claws 77 are plugged into the brake disc of the automobile brake. The transmission claws 77 can effectively transmit the power of the servo motor 72 to the brake disc. A centering block 78 is fixedly mounted on the end of the central rotating shaft 75. This block 78 is pluggably mounted on the brake disc of the vehicle. The block 78 is truncated cone-shaped, with the narrow end facing the vehicle brake. Several elastic members 79 are mounted on the surface of the block 78. The truncated cone-shaped block 78 facilitates docking with the brake disc, and the elastic members 79 act as a cushion during docking. These elastic members 79 are rubber pads.

[0033] Reference Figure 2 Servo motor 72 includes a motor shaft 73. The motor shaft 73, test shaft 82, and central rotating shaft 75 are connected via a coupling 81. Coupling 81 ensures reliable connection and power transmission between the shafts. A support plate 90 is also fixed to the test table 71 to support the motor shaft 73 and central rotating shaft 75, aligning them. This ensures the coaxiality of the shafts, improving test accuracy.

[0034] Reference Figure 2 and Figure 4 The mounting platform 50 is also provided with a mounting assembly for securing the vehicle brake. The mounting assembly includes several positioning pillars 51, each with a positioning boss 511 formed on its top. The vehicle brake is mounted via the positioning boss 511. The positioning boss 511 is cylindrical and can accurately determine the installation position of the vehicle brake. The mounting assembly also includes a gland 521, which has a fixing hole 53 formed therein. The positioning boss 511 engages with the fixing hole 53. The gland 521 is also connected to a wrench 52. By flipping the wrench 52, the gland 521 can be pressed against the positioning pillar 51, thereby opening and closing the gland 521.

[0035] Reference Figure 3 and Figure 5The testing mechanism also includes a deformation feedback component, which includes a test arm 83. The test arm 83 is arranged in the rotation direction of the automobile brake disc. An angle sensor 84 is provided at the end of the test arm 83 away from the automobile brake, and the rotating shaft of the angle sensor 84 is connected to the test arm 83. The angle sensor 84 can detect the rotation angle of the test arm 83, thereby providing feedback on the deformation of the brake disc. The deformation feedback component also includes a movable plate 85 arranged below the test arm 83, and the angle sensor 84 is mounted on the movable plate 85. The movable plate 85 is also provided with an arc groove 86. A support column 831 is provided at the bottom of the test arm 83 and is inserted into the arc groove 86. The arc groove 86 can provide guidance for the rotation of the support column 831. A positioning magnet 87 is centrally mounted at the bottom of the arcuate slot 86. The support column 831 is made of a magnetic material. During the resetting process of the test arm 83, the support column 831 can be attracted by the positioning magnet 87 and centered within the arcuate slot 86. The positioning magnet 87 can maintain the support column 831 in the proper position. An extension plate 88 is disposed below the movable plate 85. Two slide shafts 89 are mounted opposite each other on the extension plate 88. A guide rail locking block 891 is slidably mounted on the slide shafts 89. The movable plate 85 is mounted on the guide rail locking block 891 and can move along the slide shafts 89. The slide shafts 89 and the guide rail locking block 891 enable the movable plate 85 to move smoothly. Depending on actual usage, the position of the movable plate 85 can be fixed by the locking function of the guide rail locking block 891.

[0036] The implementation principle of this embodiment is as follows: the semi-automatic assembly and inspection production line of automobile brakes is equipped with a disc runout detection module 1, a flip module 2, a pre-tightening code scanning and labeling module 3, a visual inspection module 4 and a torque detection module 5 in sequence. The disc runout detection module 1 performs an end face runout test on the assembled wheel hub bearing and brake disc. The flip module 2 automatically flips the product that has completed the runout test 180 degrees. After flipping, the operator manually installs the fender and steering knuckle, and pre-tightens the relevant bolts. The pre-tightening code scanning and labeling module 3 performs the final locking of the manually pre-tightened bolts, scans the code information to bind, and affixes the label. The visual inspection module 4 automatically detects the integrity of the product appearance. The modules are connected in sequence according to the process flow to realize the semi-automatic process of runout detection of the wheel hub bearing-brake disc assembly, assembly of key components, bolt tightening, information labeling, appearance quality inspection and torque verification, effectively improving production efficiency and product quality.

[0037] During the operation of the torque detection module 5, the vehicle brake is installed on the mounting assembly via a blanking robot arm. Specifically, the blanking robot arm aligns the pre-recorded mounting threaded holes on the vehicle brake with the positioning bosses 511 and installs the brake. The operator then manually turns the wrench 52 to press the gland 521 onto the positioning pillar 51, so that the fixing holes 53 fit over the positioning bosses 511, securing the vehicle brake securely. The movable plate 85 is then manually advanced, bringing the test arm 83 close to one side of the vehicle's brake disc in the direction of rotation. A predetermined testing gap is established between the test arm 83 and the brake disc, which is determined by the thermal expansion of the brake disc after fatigue and overheating. After adjusting the position of the movable plate 85, the guide rail locking block 891 locks the movable plate 85.

[0038] After debugging the test mechanism, the propulsion cylinder 64 is activated, slowly pushing the test table 71 toward the vehicle brake, inserting the centering block 78 into the inner hole of the wheel hub bearing on the brake disc. The elastic member 79 tightens the centering block 78 and centers the brake disc. As the test table 71 continues to move, the transmission claw inserts into the transmission hole in the brake disc after the centering block 78 is inserted. The servo motor 72 is then activated, and the vehicle brake begins to operate, causing the brake to drive the brake pads to stop the brake disc. The braking force is adjusted to produce various test conditions. In these test conditions, the torque test results are obtained by reading the torque sensor 80.

[0039] During extended testing, the brake disc will expand due to overheating caused by prolonged braking. This expansion pushes the test arm 83 to move. Angle sensor 84 reads the angle of movement of the test arm 83, and a computer calculates the brake disc deformation value based on the length of the test arm 83. Based on the calculated deformation value, the operator can measure the braking torque of the brake disc during this thermal expansion. This allows the torque detection module 5 to test the operating efficiency of the vehicle brake under extreme operating conditions such as high-speed rotation. This is a feature not available in the prior art and represents a significant improvement and contribution to the existing technology.

[0040] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A semi-automatic assembly and testing production line for automobile brakes, comprising a disc jump detection module (1), a turnover module (2), a pre-tightening code scanning and labeling module (3), a visual inspection module (4) and a torque detection module (5) arranged in sequence, characterized in that: The torque detection module (5) comprises a mounting platform (50), a test table (71) is provided on the mounting platform (50), and the test table (71) is mounted on the mounting platform (50) via a sliding assembly; A testing mechanism is provided on the test table (71), comprising a servo motor (72) and a plug connector (74). The servo motor (72) is controlled by a switch button (901) provided on the mounting platform (50). The plug connector (74) is used to install a vehicle brake. A torque sensor (80) for detecting torque is installed between the servo motor (72) and the plug connector (74). Test shafts (82) are provided at both ends of the torque sensor (80).

2. The semi-automatic assembly and testing production line for automobile brakes according to claim 1, characterized in that: The plug connector (74) includes a central rotating shaft (75) connected to a coupling (81), a sleeve (76) is fixed on the central rotating shaft (75), and a plurality of transmission claws (77) are fixedly installed at annular intervals on the circumference of the sleeve (76).

3. The semi-automatic assembly and testing production line for automobile brakes according to claim 2, characterized in that: A centering block (78) is fixedly mounted on the end of the central rotating shaft (75). The centering block (78) is arranged in a truncated cone shape, with the narrow end of the centering block (78) facing the automobile brake. A plurality of elastic members (79) are mounted on the surface of the centering block (78).

4. The semi-automatic assembly and testing production line for automobile brakes according to claim 2, characterized in that: The servo motor (72) includes a motor shaft (73), and the motor shaft (73), the test shaft (82) and the central rotating shaft (75) are connected via a coupling (81); A support plate (90) for supporting the motor shaft (73) and the central rotating shaft (75) is also fixedly provided on the test table (71), so that the motor shaft (73), the test shaft (82) and the central rotating shaft (75) are located on an axis.

5. The semi-automatic assembly and testing production line for automobile brakes according to claim 1, characterized in that: The mounting platform (50) is also provided with a mounting assembly for fixing the automobile brake, the mounting assembly comprising a plurality of positioning pillars (51), the tops of the positioning pillars (51) are provided with positioning bosses (511), and the automobile brake is mounted via the positioning bosses (511); The mounting assembly further comprises a pressure cover (521), a fixing hole (53) is provided on the pressure cover (521), a positioning boss (511) is plugged into and matched with the fixing hole (53), and the pressure cover (521) is further connected to a wrench (52), and the pressure cover (521) can be pressed onto the positioning pillar (51) by turning over the wrench (52), thereby realizing the opening and closing function of the pressure cover (521).

6. The semi-automatic assembly and testing production line for automobile brakes according to claim 1, characterized in that: The testing mechanism further includes a deformation feedback component, which includes a testing arm (83). The testing arm (83) is arranged in the rotation direction of the automobile brake disc. An angle sensor (84) is arranged at one end of the testing arm (83) away from the automobile brake, and a rotating shaft of the angle sensor (84) is connected to the testing arm (83).

7. The semi-automatic assembly and testing production line for automobile brakes according to claim 6, characterized in that: The deformation feedback component also includes a movable plate (85) arranged below the test arm (83), the angle sensor (84) is installed on the movable plate (85), and the movable plate (85) is also provided with an arc groove (86). A support column (831) is provided at the bottom of the test arm (83) and is inserted into the arc groove (86).

8. The semi-automatic assembly and testing production line for automobile brakes according to claim 7, characterized in that: A positioning magnetic block (87) is installed in the center of the bottom of the arc-shaped groove (86), and the support column (831) is set to a magnetic material. The support column (831) can be adsorbed by the positioning magnetic block (87) and centered in the arc-shaped groove (86).

9. The semi-automatic assembly and testing production line for automobile brakes according to claim 7, characterized in that: An extension plate (88) is provided below the movable plate (85), two sliding shafts (89) are oppositely mounted on the extension plate (88), a guide rail locking block (891) is slidably mounted on the sliding shaft (89), and the movable plate (85) is mounted on the guide rail locking block (891) and can move along the sliding shaft (89).

10. The semi-automatic assembly and testing production line for automobile brakes according to claim 1, characterized in that: The sliding assembly includes a fixed base plate (61), a slide rail (62) is provided on the fixed base plate (61), the test table (71) is movably mounted on the slide rail (62) via a slider (63), and a propulsion cylinder (64) for driving the slider (63) to move is also provided on the side of the fixed base plate (61).

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