Ejection device for automobile ABS performance test

Abstract

The invention provides an ejection device for an automobile ABS performance test. Comprising a scissor-fork type hydraulic lifting machine base, a scissor-fork type hydraulic lifting machine, a lifting machine sliding rail, a single-rod type hydraulic cylinder, an upper pulley, a lower pulley, a rail, a ratchet mechanism, a fixing platform, a cylindrical base, a C-opening bumper clamp, a fastening cover, a fastening screw, a locking safety mechanism, a locking screw, a bumper clamp, a circular fixing mechanism, a longitudinal moving mechanism and a longitudinal locking mechanism. A fork-shaped scissor frame and a pair of scissor mechanisms; according to the invention, the power unit of the device is directly mounted on the mobile equipment, can directly move together with the load, and can be tested at any time, so that the application range of the ejection device is expanded; the device has low requirements on ejection, and can realize continuous ejection for multiple times; the device adopts a mechanical fixing mode and is reliable to fix; and test failure caused by insufficient fastening torque is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile ABS testing, and in particular relates to an ejection device for automobile ABS performance testing. Background Art

[0002] With the development of the times, ejection devices have been widely used in the military field, aviation field, and automobile collision field; for example, electromagnetic ejection devices on military ships, pneumatic ejection devices for unmanned small aircraft, and hydraulic ejection devices for automobile collision tests; the above three ejection devices will allow the load to obtain a large initial kinetic energy when started; the difference in the ejection method of the ejection device determines the difference in ejection performance, and the different fixing methods of the ejection device and the load determine the success rate of the ejection; and the existing ejection methods and fixing methods are roughly divided into three types:

[0003] 1. Electromagnetic catapult device and fixing method through pull rod spring lock hook; electromagnetic catapult uses linear motor as core component, and releases huge amount of energy in a short time through energy storage system such as large-capacity film capacitor; when the energy reaches a certain level, the computer issues a command to release the pull rod spring lock pin, so that the lock pin is separated from the load and the load is successfully ejected; the disadvantages of this method are: the device requires more basic hardware, a larger site layout, and the ejection requirements of the ejection device are relatively strict;

[0004] 2. Pneumatic ejection device and gear meshing fixing method; the high-pressure gas in the gas cylinder enters the cylinder through the pneumatic pipeline, pushing the piston to move at high speed; the movement of the piston drives the speed-increasing pulley set and the traction rope, pulling the pulley and the load after unlocking the gear meshing mechanism to accelerate the movement; the gear meshing mechanism is through the internal meshing of two gears and setting a locking mechanism. After the command is issued, the locking mechanism is opened and the two gears are separated; the disadvantages of this method: the device has high requirements for gas pressure, temperature, humidity and other aspects, and it is necessary to control various conditions to achieve ejection and cannot be ejected multiple times continuously;

[0005] 3. Hydraulic ejection device and additional friction fixing method; The hydraulic ejection device uses the energy stored in the accumulator to allow high-pressure liquid to quickly enter the inner cavity of the ejector and flow through the spring and piston combination under the action of the control valve; the spring stores energy and provides resistance to increase the liquid pressure rapidly; when the pressure reaches a certain level, it pushes the piston to form a high-speed hydraulic flow, and transmits this force to the load through the additional friction fixing device, thereby achieving rapid acceleration of the load in a short time;

[0006] All three devices have their own advantages and disadvantages, but they cannot meet all requirements at the same time; defects and shortcomings of the existing technology:

[0007] 1. The basic hardware used requires a fixed installation position (cannot move with the load) and the conditions of use are relatively strict;

[0008] 2. It takes a long time to complete one ejection preparation, and continuous ejection cannot be performed. The gear meshing mechanism is separated and combined for a long time, and wear is large, requiring regular maintenance;

[0009] 3. The fixing method using additional friction will make the fixing method unreliable, and may cause detachment, displacement, ejection, etc., affecting the ejection test results.

[0010] Therefore, it is very necessary to invent a kind of ejection device of automobile ABS performance test. Summary of the invention

[0011] The present invention provides an ejection device for automobile ABS performance testing to solve the technical problems mentioned in the background technology section;

[0012] To this end, the present invention provides an ejection device for automobile ABS performance test, comprising a scissor-type hydraulic lift base, a scissor-type hydraulic lift, a lift slide rail, a single-rod hydraulic cylinder, an upper pulley, a lower pulley, a track, a ratchet mechanism, a fixed platform, a cylindrical base, a C-mouth bumper clamp, a fastening cover, a fastening screw, a locking insurance mechanism, a locking screw, a bumper clamp, a circular fixing mechanism, a longitudinal moving mechanism, a longitudinal locking mechanism, a fork-type scissor frame and a pair of scissor mechanisms, wherein the scissor-type hydraulic lift base is installed on the bottom base of the test device; the lift slide rail is installed in the length direction of the scissor-type hydraulic lift base; the lower end of the scissor-type hydraulic lift is installed on the lift slide rail through the lower pulley; the lower pulley is in friction contact with the lift slide rail; the single-rod hydraulic cylinder is installed inside the scissor-type hydraulic lift; the two ends of the single-rod hydraulic cylinder are connected to the lift slide rail. The ends are respectively installed with fork-type scissor frames; the fork-type scissor frames are installed in a pair of scissor mechanisms; the upper pulleys are installed on the upper ends of the pair of scissor mechanisms; the track is obtained by digging deep grooves on both sides of the fixed platform in the length direction; the upper pulley is installed on the track, and the upper pulley is in friction contact with the track; the ratchet mechanism is installed in the middle part of the fixed platform; a plurality of bumper clamps are installed on the longitudinal moving mechanism; the lower end of the cylindrical base cooperates with the longitudinal moving mechanism through a circular fixing mechanism and is locked with a locking screw; a locking safety mechanism is also installed on the longitudinal moving mechanism; the locking safety mechanism cooperates with the ratchet mechanism, and the locking safety mechanism and the ratchet mechanism are collectively referred to as the longitudinal locking mechanism; a C-mouth bumper clamp is installed above the cylindrical base; the opening of the C-mouth bumper clamp cooperates with each other through a fastening cover, and the C-mouth bumper clamp and the fastening cover are fastened by fastening screws.

[0013] Preferably, the length and width of the base of the scissors-type hydraulic lift are consistent with the length and width of the bottom base of the test device; lubricating oil is provided at the contact point between the lift slide rail and the lower pulley; lubricating oil is provided at the contact point between the upper pulley and the track; the longitudinal moving mechanism is arranged on the ratchet mechanism, and the longitudinal moving mechanism moves freely in the fixed platform, so as to adjust the spacing of the longitudinal moving mechanism in the longitudinal direction.

[0014] Preferably, the lateral spacing is adjusted by changing the tightness of the locking screw so as to adapt to different bumpers; the locking safety mechanism is a pawl, which can only be moved outward in a single direction to be locked; when the longitudinal moving mechanism moves outward, the pawl falls into the ratchet mechanism, and the relative forces are balanced with each other, and it cannot move forward and backward, so that it is reliably locked in the longitudinal direction.

[0015] Preferably, to release the lock, adjust the position of the longitudinal moving mechanism, lift the pawl, and move the position. To ensure that the locking safety mechanism can move back and forth reliably, a groove is dug for the longitudinal moving mechanism here; a gasket is installed inside the C-mouth bumper clamp to increase friction and protect the bumper when clamping the bumper.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. In the present invention, the power unit of the device is directly installed on the mobile device, can move directly with the load, and can be tested at any time, thereby expanding the application scope of the ejection device;

[0018] 2. In the present invention, the device has low requirements for ejection and can achieve multiple ejections in succession;

[0019] 3. In the present invention, the device is fixed in a mechanical manner, which is reliable; and the test will not fail due to insufficient tightening torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 The present invention Figure 1 Sectional view of AA in the middle;

[0022] Figure 3 It is a structural schematic diagram of a fork-type scissor frame and a pair of scissor mechanisms of the present invention;

[0023] Figure 4 is a top view of the present invention;

[0024] Figure 5 It is a flow chart of the ejection start of the present invention;

[0025] Figure 6It is a flow chart of stopping ejection of the present invention.

[0026] In the figure:

[0027] 1. Scissor-type hydraulic lift base; 2. Scissor-type hydraulic lift; 3. Lift slide rail; 4. Single-rod hydraulic cylinder; 5. Upper pulley; 6. Lower pulley; 7. Track; 8. Ratchet mechanism; 9. Fixed platform; 10. Cylindrical base; 11. C-type bumper clamp; 12. Fastening cover; 13. Fastening screw; 14. Locking safety mechanism; 15. Locking screw; 16. Bumper clamp; 17. Circular fixing mechanism; 18. Longitudinal moving mechanism; 19. Longitudinal locking mechanism; 20. Fork-type scissor frame; 21. A pair of scissor mechanisms; DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings:

[0029] Example:

[0030] As attached Figure 1 To Attachment Figure 6 Shown

[0031] The present invention provides an ejection device for automobile ABS performance test, comprising a scissor-type hydraulic lift base 1, a scissor-type hydraulic lift 2, a lift slide rail 3, a single-rod hydraulic cylinder 4, an upper pulley 5, a lower pulley 6, a track 7, a ratchet mechanism 8, a fixed platform 9, a cylindrical base 10, a C-mouth bumper clamp 11, a fastening cover 12, a fastening screw 13, a locking insurance mechanism 14, a locking screw 15, a bumper clamp 16, a circular fixing mechanism 17, a longitudinal moving mechanism 18, A longitudinal locking mechanism 19, a fork-type scissor frame 20 and a pair of scissor mechanisms 21, a scissor-type hydraulic lift base 1 is installed on the bottom base of the test device; a lift slide rail 3 is installed in the length direction of the scissor-type hydraulic lift base 1; the lower end of the scissor-type hydraulic lift 2 is installed on the lift slide rail 3 through a lower pulley 6; the lower pulley 6 and the lift slide rail 3 are in friction contact; a single-rod hydraulic cylinder 4 is installed inside the scissor-type hydraulic lift 2; the two ends of the single-rod hydraulic cylinder 4 are respectively A fork-type scissor frame 20 is installed; the fork-type scissor frame 20 is installed in a pair of scissor mechanisms 21; an upper pulley 5 is installed at the upper end of the pair of scissor mechanisms 21; the track 7 is obtained by digging deep grooves on both sides of the fixed platform 9 in the length direction; the upper pulley 5 is installed on the track 7, and the upper pulley 5 is in friction contact with the track 7; a ratchet mechanism 8 is installed in the middle part of the fixed platform 9; a plurality of bumper clamps 16 are installed on the longitudinal moving mechanism 18; the lower end of the cylindrical base 10 cooperates with the longitudinal moving mechanism 18 through a circular fixing mechanism 17, and is locked with a locking screw 15; a locking safety mechanism 14 is also installed on the longitudinal moving mechanism 18; the locking safety mechanism 14 cooperates with the ratchet mechanism 8, and the locking safety mechanism 14 and the ratchet mechanism 8 are collectively referred to as a longitudinal locking mechanism 19; a C-mouth bumper clamp 11 is installed above the cylindrical base 10; the opening of the C-mouth bumper clamp 11 cooperates with each other through a fastening cover 12, and the C-mouth bumper clamp 11 and the fastening cover 12 are fastened by fastening screws 13.

[0032] Preferably, the length and width of the scissors-type hydraulic lift base 1 are consistent with the length and width of the bottom base of the test device; lubricating oil is provided at the contact point between the lift slide rail 3 and the lower pulley 6; lubricating oil is provided at the contact point between the upper pulley 5 and the track 7; the longitudinal moving mechanism 18 is arranged on the ratchet mechanism 8, and the longitudinal moving mechanism 18 moves freely in the fixed platform 9, so as to adjust the spacing of the longitudinal moving mechanism 18 in the longitudinal direction.

[0033] Preferably, the lateral spacing is adjusted by changing the tightness of the locking screw 15 to adapt to different bumpers; the locking safety mechanism 14 is a pawl, which can only be moved outward in a single direction to lock; when the longitudinal moving mechanism 18 moves outward, the pawl falls into the ratchet mechanism 8, and the relative forces are balanced with each other, and it cannot move forward and backward, so that it is reliably locked in the longitudinal direction.

[0034] Preferably, to release the lock, adjust the position of the longitudinal moving mechanism 18, lift the pawl, and move the position. To ensure that the locking safety mechanism 14 can move back and forth reliably, a groove is dug through the longitudinal moving mechanism 18 here; a gasket is installed inside the C-mouth bumper clamp 11 to increase friction and protect the bumper when clamping the bumper.

[0035] How it works

[0036] In the present invention, the vertical constraint of the clamped test vehicle is performed: the vertical constraint is performed by locking the single-rod hydraulic cylinder 4; when the scissor-type hydraulic lift 2 is lifted to the required height, the rodless chamber of the hydraulic cylinder no longer takes in oil, and the stop valve is closed, so that the oil circuit is cut off and oil cannot flow; when the hydraulic cylinder needs to be locked, the two chambers of the cylinder are closed by a hydraulically controlled one-way valve, so that the oil in the cylinder cannot flow, and therefore the cylinder cannot move, thereby realizing the locking function; finally, the single-rod hydraulic cylinder 4 is maintained at a certain height; lateral constraint: the lateral constraint is divided into constraints in the length direction and constraints in the width direction; in the length direction, the length is changed by moving the longitudinal moving mechanism 18; the longitudinal moving mechanism 18 can be directly moved back and forth on the ratchet mechanism 8, and then constrained in the length direction by the longitudinal locking mechanism 19; the longitudinal locking mechanism 19 is specifically divided into a locking safety mechanism 14 and a ratchet mechanism 8 , the locking safety mechanism 14 is installed on the longitudinal moving mechanism 18, and the locking safety mechanism 14 is a pawl, which can only move outward in a single direction to lock; when the longitudinal moving mechanism 18 moves outward, the pawl falls into the ratchet mechanism 8, and the two pairs of forces are balanced with each other, and it is impossible to move forward and backward, so that it is reliably locked in the longitudinal direction; if the lock is to be released, the position of the longitudinal moving mechanism 18 must be adjusted, the pawl must be lifted, and the position must be moved; in order to ensure that the locking safety mechanism 14 can move back and forth reliably, it is necessary to dig a groove through the longitudinal moving mechanism 18 here to ensure that the ratchet mechanism 8 can move back and forth to achieve constraint in the length direction; Constraint in the width direction: the bumper clamp (lateral moving mechanism) 16 is installed as a whole on the longitudinal moving mechanism 18, and the lower end is threadedly fastened to the longitudinal moving mechanism 18 through a circular fixing mechanism 17 and a locking screw 15 to ensure its constraint in the width direction;

[0037] When a command is issued to ascend, oil enters the rodless chamber. Since the effective area of ​​the rodless chamber is larger than that of the rod chamber, a greater thrust is generated, pushing the piston rod outward; the piston rod extends outward to drive the moving end (upper end), because the moving end (upper end) is installed on the fork-type scissor frame 20, and the fork-type scissor frame 20 is installed between a pair of scissor mechanisms 21. The pair of scissor mechanisms 21 move upward, driving the whole upward; when the required position is reached, the piston rod extends to the predetermined position, the control valve is closed, and the oil supply stops; the internal pressure of the hydraulic cylinder reaches a balanced state, and the piston rod remains in an extended state; when it is necessary to descend, the hydraulic oil in the rod chamber flows back to the oil tank through the control valve, causing the piston rod to retract;

[0038] Ejection start: The ejection mechanism is physically connected to the test vehicle. The ejection mechanism receives the speed signal from the vehicle and uniformly organizes and feeds it back to the computer operation terminal. Connect the vehicle to the ejection mechanism. After confirming that the connection is stable (manually), the ejection mechanism will send an ejection request signal, and the other computer operation terminal will receive and control the signal. When the computer operation terminal receives the signal, it means that the connection between the two ends is normal. The ejection request signal sent by the ejection mechanism contains some conditional information, such as: vehicle status, motor temperature, test environment safety, etc. The computer operation terminal will self-check these conditions and after a series of self-checks, it will check the current ejection drive. The total available power of the ejection drive mechanism is calculated; after the total available power of the current ejection drive mechanism is calculated, a motor driver torque signal is sent back to the ejection mechanism, and the ejection mechanism responds to the motor driver torque signal; after receiving the motor driver torque signal, the computer operation end analyzes whether the signal is in the ejection start operation state; when the signal is analyzed to be in the ejection start operable state, the computer operation end will open the ejection channel to the ejection drive mechanism, the ejection mechanism starts to increase the torque of the motor driver, and sends a release request to the computer operation end, and the computer operation end controls the release request of the motor driver torque;

[0039] Stop ejection: The ejection mechanism is physically connected to the test vehicle. The ejection mechanism will receive the speed signal from the vehicle and uniformly organize and feed it back to the computer operation terminal. When the vehicle accelerates to the test speed, it needs to decelerate sharply to test the ABS performance, that is, the ejection mechanism stops ejecting. At this time, the ejection mechanism sends a request to stop ejection to the computer operation terminal, and the computer operation terminal receives this signal. The computer operation terminal will perform data analysis based on the current conditions, for example: test the actual speed of the ejection mechanism, the temperature of the motor driver, whether the status of the kinetic energy recovery mechanism in the motor driver meets the working requirements, etc.; obtain the motor driver torque signal, and calculate the total power that the motor driver needs to recover kinetic energy based on the current operating speed; the computer operation terminal sends a signal to the ejection mechanism whether the kinetic energy recovery mechanism is in a state where kinetic energy recovery can be performed; after confirming that the operation is possible, the signal channel for kinetic energy recovery is opened to control the execution request of the kinetic energy recovery actuator.

[0040] Utilizing the technical solution of the present invention, or those skilled in the art designing similar technical solutions inspired by the technical solution of the present invention to achieve the above-mentioned technical effects, all fall within the protection scope of the present invention.

Claims

1. An ejection device for automobile ABS performance testing, characterized in that: The invention comprises a scissor-type hydraulic lift base (1), a scissor-type hydraulic lift (2), a lift slide rail (3), a single-rod hydraulic cylinder (4), an upper pulley (5), a lower pulley (6), a track (7), a ratchet mechanism (8), a fixed platform (9), a cylindrical base (10), a C-shaped bumper clamp (11), a fastening cover (12), a fastening screw (13), a locking safety mechanism (14), a locking screw (15), a bumper clamp (16), a circular fixing mechanism (17), a longitudinal moving mechanism (18), a longitudinal locking mechanism (19), a fork-type scissor frame (20) and a For the scissor mechanism (21), the scissor-type hydraulic lift base (1) is installed on the bottom base of the test device; the lift slide rail (3) is installed in the length direction of the scissor-type hydraulic lift base (1); the lower end of the scissor-type hydraulic lift (2) is installed on the lift slide rail (3) through a lower pulley (6); the lower pulley (6) and the lift slide rail (3) are in friction contact; the single-rod hydraulic cylinder (4) is installed inside the scissor-type hydraulic lift (2); the two ends of the single-rod hydraulic cylinder (4) are respectively installed with a fork-type scissor frame (20); the fork-type scissor The fork frame (20) is installed in a pair of scissor-fork mechanisms (21); the upper pulley (5) is installed at the upper end of the pair of scissor-fork mechanisms (21); the track (7) is obtained by digging deep grooves on both sides of the fixed platform (9) in the length direction; the upper pulley (5) is installed on the track (7), and the upper pulley (5) and the track (7) are in friction contact; the middle part of the fixed platform (9) is installed with a ratchet mechanism (8); a plurality of bumper clamps (16) are installed on the longitudinal moving mechanism (18); the lower end of the cylindrical base (10) is connected to the longitudinal moving mechanism (18) through a circular fixing mechanism (17). 18) cooperate with each other and are locked with a locking screw (15); a locking safety mechanism (14) is also installed on the longitudinal moving mechanism (18); the locking safety mechanism (14) cooperates with the ratchet mechanism (8), and the locking safety mechanism (14) and the ratchet mechanism (8) are collectively referred to as a longitudinal locking mechanism (19); a C-mouth bumper clamp (11) is installed above the cylindrical base (10); the opening of the C-mouth bumper clamp (11) cooperates with each other through a fastening cover (12), and the C-mouth bumper clamp (11) and the fastening cover (12) are fastened by a fastening screw (13).

2. The ejection device for automobile ABS performance test as claimed in claim 1, characterized in that: The length and width of the scissor-type hydraulic lift base (1) are consistent with the length and width of the bottom base of the test device.

3. The ejection device for automobile ABS performance test as claimed in claim 1, characterized in that: The contact point between the lift slide rail (3) and the lower pulley (6) is provided with lubricating oil; the contact point between the upper pulley (5) and the track (7) is provided with lubricating oil.

4. The ejection device for automobile ABS performance test as claimed in claim 1, characterized in that: The longitudinal moving mechanism (18) is arranged on the ratchet mechanism (8), and the longitudinal moving mechanism (18) moves freely in the fixed platform (9), thereby adjusting the spacing of the longitudinal moving mechanism (18) in the longitudinal direction.

5. The ejection device for automobile ABS performance test as claimed in claim 1, characterized in that: The lateral spacing can be adjusted by changing the tightness of the locking screw (15) so as to adapt to different bumpers.

6. The ejection device for automobile ABS performance test as claimed in claim 1, characterized in that: The locking safety mechanism (14) is a ratchet that can only be moved outward in a single direction to lock; when the longitudinal moving mechanism (18) moves outward, the ratchet falls into the ratchet mechanism (8), and the relative forces are balanced with each other, making it impossible to move forward and backward, so that it is reliably locked in the longitudinal direction.

7. The ejection device for automobile ABS performance test as claimed in claim 6, characterized in that: If the lock is to be released, the position of the longitudinal moving mechanism (18) is adjusted, the ratchet is lifted, and the position is moved. In order to ensure that the locking safety mechanism (14) can move back and forth reliably, a through groove is dug in the longitudinal moving mechanism (18) at this point.

8. The ejection device for automobile ABS performance test as claimed in claim 1, characterized in that: A washer is installed inside the C-mouth bumper clamp (11) to increase friction and protect the bumper when clamping the bumper.

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