High-speed shaft string automatic docking system for new energy automobile high-rotating-speed offline test bench

Abstract

The utility model discloses a high-speed shaft string automatic docking system for a new energy automobile high-speed off-line test bench, which relates to the technical field of new energy automobile high-speed off-line test benches and comprises a bench bottom plate, a damping base, a docking support, a sliding table, a high-speed shaft string part, a linear driving part, a hydraulic clamping jaw, a lifting sliding table and an electric control system. According to the utility model, the system is divided into a plurality of modules which are convenient to maintain and upgrade, axial high-precision movement of the high-speed shaft string part is realized through combination of the linear driving servo motor, the linear driving screw rod and the driving slide block, and accurate butt joint with a workpiece to be detected is ensured; a positioning pin and a positioning pin hole are cooperatively used, so that the butt joint precision is improved in an auxiliary manner; full-automatic butt joint of the high-speed off-line test bench is realized through the PLC system; and the butt joint precision is less than or equal to 0.03 mm, so that compared with the conventional manual butt joint, the working efficiency is improved, the participation of personnel is reduced, and a large amount of labor cost can be saved.

Description

Technical Field

[0001] The utility model relates to the technical field of high-speed offline test benches for new energy vehicles, in particular to a high-speed shaft string automatic docking system for high-speed offline test benches for new energy vehicles. Background Art

[0002] High-speed end-of-line test benches in the new energy vehicle sector are critical equipment for simulating and testing the performance and reliability of electric motors and other powertrains under high-speed operating conditions. These test benches must not only withstand the mechanical stresses of high speeds but also ensure the accuracy and automation of the testing process to improve test efficiency and accuracy. Therefore, high-speed end-of-line test benches must be able to withstand and test the performance of electric motors at high speeds, which can reach speeds of thousands or even tens of thousands of revolutions per minute. To improve testing efficiency, high-speed end-of-line test benches must have an automatic docking function to ensure rapid and accurate positioning and clamping of the workpiece under test. Furthermore, positioning accuracy requirements are significantly higher than those of conventional end-of-line test benches, with an optimal accuracy of 0.03mm being required to ensure accurate test results. However, existing high-speed shaft-to-shaft docking systems in high-speed end-of-line test benches for new energy vehicles lack an automatic docking mechanism, requiring manual docking. This significantly impacts the testing efficiency of high-speed workpieces and makes it difficult to ensure high-precision positioning and connection. Utility Model Content

[0003] The purpose of the present utility model is to provide a high-speed shaft string automatic docking system for a high-speed offline test bench for new energy vehicles, so as to solve the problem that the high-speed shaft string docking system of the existing high-speed offline test bench in the field of new energy vehicles proposed in the above background technology lacks an automatic docking structure, and when docking high-speed shaft strings, it still relies mostly on manual docking, which greatly affects the test efficiency of high-speed workpieces and makes it difficult to ensure high-precision positioning and connection.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-speed shaft string automatic docking system for a high-speed offline test bench for new energy vehicles, comprising a bench bottom plate arranged horizontally and a lifting slide on the left and a shock-absorbing base on the right arranged on its top surface, a docking bracket on the left and a slide on the right arranged on the top surface of the shock-absorbing base, a high-speed shaft string part that can slide along its axial direction is arranged on the slide; a linear drive part located on the front side of the slide and connected to the high-speed shaft string part is arranged on the top surface of the shock-absorbing base, and a hydraulic clamp is arranged on the left side of the docking bracket; The workpiece to be measured is positioned and placed; the shock-absorbing base includes a shock-absorbing base bottom plate and a shock-absorbing base top plate arranged up and down, and a shock-absorbing base side plate connecting the two plates; the docking bracket includes a docking bracket bottom plate and a docking bracket vertical plate; the slide includes a slide bottom plate and two slideways arranged thereon, and a high-speed shaft string part is arranged on the slideway through a plurality of guide sliders; the high-speed shaft string part includes a high-speed shaft string bottom plate, a dynamometer, a coupling, a transmission shaft, a transmission bearing seat, and a docking spline; the linear drive part includes a linear drive servo motor, a linear drive screw, and a drive slider; the lifting slide includes a slide base and a positioning mounting seat.

[0005] Preferably, the stand bottom plate is a rectangular bottom plate and is evenly provided with a plurality of vertical through holes near the long sides on both sides thereof, and a fixing piece is provided in each through hole.

[0006] Preferably, the shock-absorbing base includes a shock-absorbing base bottom plate arranged on the top surface of the platform bottom plate and a shock-absorbing base top plate above it and parallel thereto, and a shock-absorbing base side plate is commonly arranged between the two plates along the edges of the two plates and is filled with shock-absorbing filler inside; a plurality of transverse fixing grooves are evenly arranged on the top surface of the shock-absorbing base top plate, and a docking bracket, a slide and a linear drive part are arranged through the fixing grooves.

[0007] Preferably, the docking bracket includes a docking bracket base plate fixed to the fixing groove using bolts on the top surface of the shock-absorbing base top plate, a docking bracket vertical plate fixedly provided on the top surface of the docking bracket base plate, and a hydraulic clamp provided on the top surface of the docking bracket vertical plate.

[0008] Preferably, a retractable docking spline is provided at the center of the vertical plate of the docking bracket, and a plurality of positioning pin holes parallel to the docking spline are also provided.

[0009] Preferably, the slide includes a slide base plate fixed to the fixing groove by bolts on the top surface of the shock-absorbing base top plate, and two slideways parallel to the fixing groove are arranged on the top surface of the slide base plate, and a plurality of guide sliders that can slide along their axial direction are evenly arranged on the two slideways, and a high-speed shaft string part is commonly arranged on the top surfaces of the plurality of guide sliders.

[0010] Preferably, the high-speed shaft string portion includes a high-speed shaft string bottom plate, the bottom surface of the high-speed shaft string bottom plate is fixedly connected to the top surfaces of multiple guide sliders; a dynamometer close to the left side is provided on the top surface of the high-speed shaft string bottom plate, the shaft of the dynamometer is connected to a coaxial transmission shaft through a coupling, and the transmission shaft is provided on the top surface of the high-speed shaft string bottom plate through a transmission bearing seat; a coaxial docking spline is provided at one end of the transmission shaft away from the dynamometer,

[0011] Preferably, the linear drive part includes a linear drive servo motor arranged on the top plate of the shock-absorbing base, the shaft of the linear drive servo motor is connected to a linear drive screw, the front and rear ends of the linear drive screw are arranged on the top surface of the top plate of the shock-absorbing base through bearing seats, and the linear drive screw is provided with a drive slider that can move axially between the two bearing seats, and the drive slider is fixed to the high-speed shaft string part, so that the high-speed shaft string part can be driven to move axially with high precision by the linear drive servo motor; the drive slider is equipped with a guide rail lock to lock the drive slider after moving into position.

[0012] Preferably, the lifting slide includes a slide base arranged on the top surface of the platform bottom plate and a vertically upward lifting cylinder arranged on the inner side thereof, a horizontal lifting bottom plate is arranged on the top end of the shaft of the lifting cylinder and two docking slides parallel to the slide slide are arranged on the top surface thereof, the two docking slides are provided with a slide bottom plate through matching sliders and a docking cylinder connected to the slide bottom plate is arranged on the top surface; a workpiece positioning member is arranged on the top surface of the slide bottom plate, and a positioning pin matching the positioning pin hole and an in-position sensor are provided on the side close to the docking bracket.

[0013] Preferably, an electric control system is further included, and the electric control system includes a PLC system, and the PLC system is electrically connected to the linear drive servo motor, the hydraulic clamp, and the lifting cylinder through a field bus.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. High-precision docking: Through the combination of linear drive servo motor, linear drive screw and drive slide, high-precision axial movement of the high-speed shaft string is achieved to ensure accurate docking with the workpiece under test; the coordinated use of locating pins and locating pin holes helps to improve the docking accuracy, thereby realizing fully automatic docking of high-speed offline test benches;

[0016] 2. Automated operation: The system controls the linear drive servo motor, hydraulic gripper and lifting cylinder through the PLC system in the electronic control system to achieve automated docking and fixing processes;

[0017] 3. Advantages of shock absorption: The shock absorption base includes a shock absorption base bottom plate, a shock absorption base top plate, a shock absorption base side plate and a filled shock absorption filler, which helps to reduce vibration during the test and improve test stability;

[0018] 4. Modular structure: By breaking down the system into multiple modules, such as lifting slides, docking brackets, slides, etc., it is easy to maintain and upgrade;

[0019] 5. Stability and durability: Multiple vertical through holes and fixings on the bottom plate of the stand, as well as horizontal fixing grooves on the top plate of the shock-absorbing base, enhance the stability and durability of the entire system

[0020] 6. Flexibility: Through the use of lifting slides, the system can adapt to workpieces of different heights, increasing the flexibility of testing;

[0021] 7. Safety: The use of the guide rail lock ensures that the drive slider is locked after moving into position, preventing accidental movement and improving the safety of operation;

[0022] 8. Able to achieve docking accuracy ≤ 0.03mm, with higher precision;

[0023] 9. Compared with the previous manual docking, it improves work efficiency, reduces personnel participation, and saves a lot of labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is the axonometric drawing of the utility model;

[0025] Figure 2 for Figure 1 Structural diagram;

[0026] Figure 3 for Figure 2 A magnified view of middle A;

[0027] Figure 4 is the main view;

[0028] Figure 5 It is a top view;

[0029] Figure 6 is the left view;

[0030] In the figure: the stand base plate -1, through hole -11, shock-absorbing base -2, shock-absorbing base base plate -21, shock-absorbing base top plate -22, shock-absorbing base side plate -23, fixing groove -24, docking bracket -3, docking bracket base plate -31, docking bracket vertical plate -32, slide -4, slide base plate -41, slide slideway -42, guide slider -43, high-speed shaft string part -5, high-speed shaft string base plate -51, dynamometer -52, coupling -53, transmission shaft -54, transmission bearing seat -55, docking spline -56, linear drive part -6, linear drive servo motor -61, linear drive screw -62, drive slider -63, hydraulic clamp -7, lifting slide -8, slide base -81, lifting cylinder -82, lifting base plate -83, docking slideway -84, slide base plate -85, workpiece positioning piece -86. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings and specific embodiments.

[0032] Please refer to Figure 1-6 , Figure 1 This is the axonometric drawing of the utility model; Figure 2 for Figure 1 Structural diagram; Figure 3 for Figure 2 A magnified view of middle A; Figure 4 is the main view; Figure 5 It is a top view; Figure 6 This is the left view.

[0033] The utility model provides a high-speed shaft string automatic docking system for a high-speed offline test bench for new energy vehicles, which is used for quickly and automatically docking the high-speed shaft string with a workpiece to be measured; it includes a horizontally arranged bench base 1, a shock-absorbing base 2 is provided on the right side of the top surface of the bench base 1, a docking bracket 3 is provided on the top surface of the shock-absorbing base 2, and a slide 4 is provided on the right side of the docking bracket 3, and a high-speed shaft string part 5 that can slide along its axial direction is provided on the slide 4; a linear drive part 6 is provided on the top surface of the shock-absorbing base 2, which is located at the front side of the slide 4 and connected to the high-speed shaft string part 5, for driving the axial movement of the high-speed shaft string part 5; a hydraulic clamp 7 is provided on the left side of the docking bracket 3, for clamping the workpiece to be measured; a lifting slide 8 is provided on the top surface of the bench base 1 on the left side of the shock-absorbing base 2, and the workpiece to be measured can be positioned and placed on the top surface of the lifting slide 8 for quick connection and measurement.

[0034] The rack base plate 1 is a rectangular base plate, and a plurality of vertical through holes 11 are uniformly arranged near the two long sides of the base plate, and a fixing member is arranged in each through hole 11 for fixing the rack base plate 1.

[0035] The damping base 2 comprises a damping base plate 21 arranged on the top surface of the rack base plate 1, a damping base top plate 22 parallel to the damping base plate 21 is arranged above the damping base plate 21, a damping base side plate 23 is arranged along the edges of the two plates, and a damping filler is filled in the inside; a plurality of transverse fixing grooves 24 are uniformly arranged on the top surface of the damping base top plate 22, and a docking bracket 3, a sliding table 4 and a linear drive part 6 are arranged through the fixing grooves 24.

[0036] The docking bracket 3 comprises a docking bracket base plate 31 fixed on the top surface of the damping base top plate 22 by bolts and the fixing grooves 24, a docking bracket upright plate 32 is fixedly arranged on the top surface of the docking bracket base plate 31, a telescopic docking spline 56 is arranged at the center of the docking bracket upright plate 32, and a plurality of positioning pin holes parallel to the docking spline 56 are arranged for assisting the docking of the measured workpiece; a hydraulic clamping jaw 7 is arranged on the left side of the docking bracket upright plate 32.

[0037] The sliding table 4 comprises a sliding table base plate 41 fixed on the top surface of the damping base top plate 22 by bolts and the fixing grooves 24, two sliding table slides 42 parallel to the fixing grooves 24 are arranged on the top surface of the sliding table base plate 41, a plurality of guide sliding blocks 43 capable of sliding along the axis are uniformly arranged on the two sliding table slides 42, and a high-speed shaft string part 5 is arranged on the top surface of the plurality of guide sliding blocks 43.

[0038] The high-speed shaft string part 5 comprises a high-speed shaft string base plate 51, the bottom surface of the high-speed shaft string base plate 51 is fixedly connected with the top surface of the plurality of guide sliding blocks 43; a dynamometer 52 close to the left side is arranged on the top surface of the high-speed shaft string base plate 51, a transmission shaft rod 54 coaxial with the shaft rod of the dynamometer 52 is connected through a shaft coupling 53, the transmission shaft rod 54 is arranged on the top surface of the high-speed shaft string base plate 51 through a transmission bearing seat 55; a docking spline 56 coaxial with the transmission shaft rod 54 is arranged at the end away from the dynamometer 52, for quick docking with the tested workpiece.

[0039] The linear drive part 6 includes a linear drive servo motor 61 arranged on the top plate 22 of the shock-absorbing base, and the shaft of the linear drive servo motor 61 is connected to a linear drive screw 62. The front and rear ends of the linear drive screw 62 are arranged on the top surface of the shock-absorbing base top plate 22 through bearing seats. The linear drive screw 62 is provided with a drive slider 63 that can move along its axial direction between the two bearing seats. The drive slider 63 is fixed to the high-speed shaft string part 5, so that the high-speed shaft string part 5 can be driven to move axially with high precision by the linear drive servo motor 61; the drive slider 63 is equipped with a guide rail lock to lock the drive slider 63 after moving into place; when in use, it is necessary to reasonably calculate the model of the guide rail to ensure that the guide rail and the guide rail lock can ensure the stable operation of the shaft string.

[0040] The hydraulic clamp 7 includes a hydraulic cylinder provided on the docking bracket 3, and the hydraulic cylinder is connected to a clamp; after the workpiece to be measured is moved into position, the hydraulic clamp 7 automatically clamps the workpiece to be measured, and the clamping meets the workpiece torque requirements, and the reasonable hydraulic requirements are calculated by the friction coefficient and the torsional radius.

[0041] The lifting slide 8 includes a slide base 81 arranged on the top surface of the platform base plate 1, and a vertical upward lifting cylinder 82 is arranged on the inner side of the slide base 81, and a horizontal lifting base plate 83 is arranged on the top end of the shaft of the lifting cylinder 82, and two docking slides 84 parallel to the slide slide 42 are arranged on the top surface of the lifting base plate 83. The two docking slides 84 are provided with a slide base plate 85 that can move along its axial direction through matching sliders. A docking cylinder connected to the slide base plate 85 is also provided on the top surface of the lifting base plate 83 for driving the movement of the slide base plate 85; a workpiece positioning member 86 for positioning and fixing the workpiece to be measured is provided on the top surface of the slide base plate 85, and a positioning pin and an in-position sensor are provided on the top surface of the slide base plate 85 on the side close to the docking bracket 3, and the positioning pin is matched with the positioning pin hole for use.

[0042] In addition, an electronic control system is also provided, which includes a PLC system. The PLC system is electrically connected to the linear drive servo motor, hydraulic clamp, and lifting cylinder through a field bus, so that they can move as needed, thereby realizing automatic docking of the high-speed shaft string and the workpiece to be measured.

[0043] During use, the workpiece to be measured is positioned and placed on the slide base plate 85, and the workpiece positioning part 86 is used to assist in positioning and fixing. The workpiece to be measured is then lifted upward by the lifting cylinder 82 until it is coaxial with the docking spline 56, and then driven by the docking cylinder to move the workpiece to the docking spline 56; after that, the positioning pin enters the positioning pin hole and continues to move guided by the positioning pin. After it is in place, the sensor gives a signal of in-place, and then the hydraulic clamp is clamped, completing the mechanical fixation of the test piece; after the positioning and clamping of the workpiece to be measured is completed, the linear drive part 6 drives the high-speed shaft string part 5 to move to the left by driving the slide 4, and cooperates with the low-speed rotation of the dynamometer 52 to realize the automatic docking of the workpiece to be measured and the docking spline. After the docking is completed, the guide rail lock is locked, and the automatic docking action is completed.

[0044] The utility model realizes high-precision axial movement of the high-speed shaft string through the combination of linear drive servo motor, linear drive screw and drive slide, ensuring accurate docking with the workpiece to be tested; the coordinated use of positioning pins and positioning pin holes assists in improving the docking accuracy; and then realizes the fully automatic docking of the high-speed offline test bench; the system controls the linear drive servo motor, hydraulic clamping claw and lifting cylinder through the PLC system in the electronic control system to realize the automated docking and fixing process; the shock-absorbing base includes a shock-absorbing base bottom plate, a shock-absorbing base top plate and a shock-absorbing base side plate and a filled shock-absorbing filler, which helps to reduce vibration during the test and improve the test stability; by It is decomposed into multiple modules, such as the lifting slide, docking bracket, slide, etc., which is convenient for maintenance and upgrading; the stability and durability of the entire system are enhanced by the multiple vertical through-holes and fixings on the bottom plate of the test stand, and the horizontal fixing grooves on the top plate of the shock-absorbing base; through the use of the lifting slide, the system can adapt to the workpieces of different heights, increasing the flexibility of the test; the use of the guide rail lock ensures that the driving slide is locked after moving into place, preventing accidental movement and improving the safety of operation; it can achieve a docking accuracy of ≤0.03mm, which is higher precision; compared with the previous manual docking, it improves work efficiency, reduces personnel participation, and can save a lot of labor costs.

[0045] Although the embodiments of the present invention have been shown and described, it is clear that the described embodiments are only a portion of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, it is understood by those skilled in the art that all other embodiments obtained by various changes, modifications, substitutions, and variations of these embodiments without departing from the principles and spirit of the present invention and without making any creative efforts are within the scope of protection of the present invention.

Claims

1. A high-speed shaft string automatic docking system for a high-speed off-line test bench for new energy vehicles, characterized by: The invention comprises a horizontally arranged platform bottom plate (1) and a left-side lifting slide (8) and a right-side shock-absorbing base (2) are arranged on the top surface thereof; a left-side docking bracket (3) and a right-side slide (4) are arranged on the top surface of the shock-absorbing base (2); a high-speed shaft string portion (5) that can slide along its axial direction is arranged on the slide (4); a linear drive portion (6) located on the front side of the slide (4) and connected to the high-speed shaft string portion (5) is arranged on the top surface of the shock-absorbing base (2); a hydraulic clamping claw (7) is arranged on the left side of the docking bracket (3); a workpiece to be measured is positioned and placed on the top surface of the lifting slide (8); the shock-absorbing base (2) comprises a shock-absorbing base bottom plate (21) and a shock-absorbing base top plate (22) arranged up and down. and a shock-absorbing base side plate (23) connecting the two plates; the docking bracket (3) includes a docking bracket bottom plate (31) and a docking bracket vertical plate (32); the slide (4) includes a slide bottom plate (41) and two slideways (42) arranged thereon, and a high-speed shaft string part (5) is arranged on the slideway (42) through a plurality of guide sliders (43); the high-speed shaft string part (5) includes a high-speed shaft string bottom plate (51), a dynamometer (52), a coupling (53), a transmission shaft (54), a transmission bearing seat (55), and a docking spline (56); the linear drive part (6) includes a linear drive servo motor (61), a linear drive screw (62), and a drive slider (63); the lifting slide (8) includes a slide base (81).

2. The high-speed shaft string automatic docking system for the high-speed offline test bench of new energy vehicles according to claim 1 is characterized by: The platform bottom plate (1) is a rectangular bottom plate and is evenly provided with a plurality of vertical through holes (11) near the long sides on both sides thereof, and a fixing piece is provided in each through hole (11).

3. The high-speed shaft string automatic docking system for the high-speed offline test bench of new energy vehicles according to claim 2 is characterized by: The shock-absorbing base (2) comprises a shock-absorbing base bottom plate (21) arranged on the top surface of the platform bottom plate (1) and a shock-absorbing base top plate (22) above and parallel to the bottom plate; a shock-absorbing base side plate (23) is arranged between the two plates along the edges of the two plates and is filled with shock-absorbing filler; a plurality of transverse fixing grooves (24) are evenly arranged on the top surface of the shock-absorbing base top plate (22), and a docking bracket (3), a slide (4) and a linear drive unit (6) are arranged through the fixing grooves (24).

4. The high-speed shaft string automatic docking system for the high-speed offline test bench of new energy vehicles according to claim 3 is characterized by: The docking bracket (3) includes a docking bracket base plate (31) fixed to the top surface of the shock-absorbing base top plate (22) and the fixing groove (24) using bolts, a docking bracket vertical plate (32) fixedly provided on the top surface of the docking bracket base plate (31), and a hydraulic clamp (7) provided on the top surface of the docking bracket vertical plate (32).

5. The high-speed shaft string automatic docking system for the high-speed offline test bench of new energy vehicles according to claim 4 is characterized in that: A retractable docking spline (56) is provided at the center of the docking bracket vertical plate (32), and a plurality of positioning pin holes parallel to the docking spline (56) are also provided.

6. The high-speed shaft string automatic docking system for the high-speed offline test bench of new energy vehicles according to claim 5 is characterized by: The slide (4) includes a slide base plate (41) fixed to the fixing groove (24) by bolts on the top surface of the shock-absorbing base top plate (22); two slideways (42) parallel to the fixing groove (24) are provided on the top surface of the slide base plate (41); a plurality of guide sliders (43) that can slide along the axial direction thereof are evenly provided on the two slideways (42); and a high-speed shaft string portion (5) is commonly provided on the top surfaces of the plurality of guide sliders (43).

7. The high-speed shaft string automatic docking system for the high-speed off-line test bench of new energy vehicles according to claim 6 is characterized by: The high-speed shaft string portion (5) includes a high-speed shaft string bottom plate (51), the bottom surface of which is fixedly connected to the top surfaces of a plurality of guide sliders (43); a dynamometer (52) close to the left side is provided on the top surface of the high-speed shaft string bottom plate (51), the shaft of the dynamometer (52) is connected to a coaxial transmission shaft (54) through a coupling (53), and the transmission shaft (54) is provided on the top surface of the high-speed shaft string bottom plate (51) through a transmission bearing seat (55); a coaxial docking spline (56) is provided at one end of the transmission shaft (54) away from the dynamometer (52).

8. The high-speed shaft string automatic docking system for the high-speed off-line test bench of new energy vehicles according to claim 7 is characterized by: The linear drive portion (6) includes a linear drive servo motor (61) arranged on the top plate (22) of the shock-absorbing base, the shaft of the linear drive servo motor (61) is connected to a linear drive screw (62), the front and rear ends of the linear drive screw (62) are arranged on the top surface of the top plate (22) of the shock-absorbing base through bearing seats, and the linear drive screw (62) is provided with a drive slider (63) that can move along its axial direction between two bearing seats, and the drive slider (63) is fixed to the high-speed shaft string portion (5), so that the high-speed shaft string portion (5) can be driven by the linear drive servo motor (61) to move axially with high precision; the drive slider (63) is equipped with a guide rail lock to lock the drive slider (63) after moving into position.

9. The high-speed shaft string automatic docking system for a high-speed off-line test bench for new energy vehicles according to claim 8 is characterized by: The lifting slide (8) includes a slide base (81) arranged on the top surface of the platform base (1) and a vertically upward lifting cylinder (82) is arranged on the inner side thereof, a horizontal lifting base (83) is arranged on the top end of the shaft of the lifting cylinder (82) and two docking slides (84) parallel to the slideway (42) are arranged on the top surface thereof, the two docking slides (84) are provided with a sliding base (85) through matching sliders and a docking cylinder connected to the sliding base (85) is arranged on the top surface thereof; a workpiece positioning member (86) is arranged on the top surface of the sliding base (85), and a positioning pin matching the positioning pin hole and an in-position sensor are arranged on the side close to the docking bracket (3).

10. The high-speed shaft string automatic docking system for a high-speed off-line test bench for new energy vehicles according to any one of claims 1 to 9, characterized in that: It also includes an electric control system, which includes a PLC system. The PLC system is electrically connected to the linear drive servo motor (61), the hydraulic clamp (7), and the lifting cylinder through a field bus.

Images