Fatigue test tool of shock absorber buffer block for new energy automobile and test method thereof

Abstract

The invention relates to the technical field of shock absorber buffer blocks, in particular to a fatigue test tool of a shock absorber buffer block for a new energy automobile and a test method of the fatigue test tool, and solves the defects in the prior art. The test tool comprises a base, a first test mechanism, a second test mechanism and an adjusting mechanism; a fixing piece is arranged on the base, a buffer block for testing is placed on the fixing piece, an L-shaped fixing plate and a fixing table are further installed on the base, a first screw is rotationally arranged between the fixing plate and the base, an adjusting base is arranged on the first screw in the vertical direction, and an operation table with a PLC is further arranged on the portion, on one side of the fixing table, of the base. Compared with the prior art, the device can simulate the influence of external force on the buffer block when a vehicle decelerates and passes through a deceleration strip, and can detect the wear durability of the buffer block.

Description

Technical Field

[0001] The present invention relates to the technical field of shock absorber bumpers, and particularly to a fatigue test tooling for a shock absorber bumper used in a new energy vehicle and a test method thereof. Background Art

[0002] The shock absorber bumper is an important component in the vehicle suspension system, mainly used to limit the compression stroke of the shock absorber, prevent damage caused by excessive compression, and provide additional buffering during severe vibrations. Among them, the bumper includes an internal bumper and an external bumper. The internal bumper is usually at the top of the piston rod, while the external bumper is usually at the bottom or top of the shock absorber cylinder.

[0003] For the internal bumper, due to its installation position, the bumper and the piston rod will continuously contact each other. As time goes by, certain wear will occur on the inner surface of the bumper in contact with the piston rod, affecting the life of the bumper. However, at present, the test tooling for the bumper is all static tests, which cannot truly simulate the external force impact on the bumper during the dynamic process. For example, during the process of a vehicle decelerating over a speed bump, due to the height difference between the speed bump and the road surface, the shock absorber moves up and down, resulting in a compression process on the bumper. In addition, a greater impact is that during the deceleration braking process when passing over a speed bump, due to inertia, the contact between the bumper and the piston rod will be tighter, which may increase the wear condition.

[0004] Therefore, we propose a fatigue test tooling for a shock absorber bumper used in a new energy vehicle and a test method thereof to solve the above-mentioned problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a fatigue test tooling for a shock absorber bumper used in a new energy vehicle and a test method thereof to solve the problems raised in the above background art.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: A fatigue test tooling for a shock absorber bumper used in a new energy vehicle, including a base, a test mechanism one, a test mechanism two, and an adjustment mechanism. A fixing member is provided on the base, and a test bumper is placed on the fixing member. Moreover, an "L"-shaped fixing plate and a fixing table are also installed on the base. A screw rod one is rotatably arranged between the fixing plate and the base. An adjustment seat is arranged on the screw rod one along the vertical direction. On one side of the fixing table, an operating table with a PLC controller is also provided on the base; The test mechanism one slides and adjusts along the vertical direction, and the test mechanism one can be integrated with the adjustment seat through suction. Two pressing rods that are always parallel and opposite to each other are arranged on the test mechanism one. The pressing rods can act downward on the top surface of the bumper and generate a compression force on it; The second testing mechanism reciprocates linearly along the length direction of the fixed platform and can apply a force to the side surface of the buffer block; The adjusting mechanism is arranged on one side of the fixed platform and on the base. Guide bolts are rotatably arranged on both sides of the adjusting mechanism. The included angle between the two guide bolts and the rotation center of the adjusting mechanism is always 90 degrees, and the two guide bolts can respectively drive and control the first testing mechanism and the second testing mechanism, so as to simulate the compression force from the shock absorber and the thrust generated by braking that the vehicle receives simultaneously when decelerating through the speed bump.

[0007] In one embodiment, the fixing member is composed of a cylindrical platform and a vertical shaft. The vertical shaft is installed in the middle of the cylindrical platform along the vertical direction. The cylindrical platform is installed on the base. One end of the fixed platform is fixedly connected to the outer surface of the cylindrical platform, and a fixing groove is formed on the fixed platform. A transverse rod is arranged along the length direction in the fixing groove; A first rotating motor is arranged on one of the vertical side walls of the fixing plate. A first bevel gear is arranged on the output shaft of the first rotating motor. A second bevel gear is installed on the first screw rod and rotates synchronously with it. The first bevel gear and the second bevel gear are meshed and driven. Two limiting rings fixed to the first screw rod are also arranged on the first screw rod. Contact sensors are embedded on the opposite surfaces of the two limiting rings, and external threads are only arranged on the outer surface of the first screw rod between the two limiting rings; The adjusting seat reciprocates between the two limiting rings, and a photosensitive member is embedded on the outer surface of the adjusting seat facing the fixing plate. A light-emitting member is embedded on the side wall of the fixing plate. Among them, the light-emitting member is an infrared light-emitting diode, and the photosensitive member is a photosensitive sensor; Two first guide rods and a second guide rod are also arranged between the fixing plate and the base. The first guide rods and the second guide rod are both arranged along the vertical direction.

[0008] In one embodiment, the first testing mechanism includes a lifting seat, an adjusting gear, and a pressing rod; The lifting seat is arranged in an "L" shape, and a support plate is installed on one of its vertical side walls. A second rotating motor is installed on the bottom wall of the support plate. Two adjusting gears are arranged and meshed above the support plate. One of the adjusting gears is connected to the output shaft of the second rotating motor. Two pressing rods are arranged and respectively fixed on the top surfaces of the two adjusting gears. The two pressing rods are always relatively parallel, and strip-shaped contact sensors are embedded on the opposite side walls of the two pressing rods, and a distance sensor is also arranged on the side wall of one of the pressing rods; On the other vertical side wall of the lifting seat, an adsorbing member fixed thereto is installed. The adsorbing member is an electromagnet. A guide block is arranged on the adjusting seat. The guide block is arranged in a dovetail structure and is matched with the adsorbing member. The guide block can slide and adjust along the inner wall of the adsorbing member, and the guide block and the adsorbing member can also be integrated by suction force. An external power supply connected to the adsorbing member through a wire is installed on the side wall of the lifting seat, and two fixing strips are also arranged on the lifting seat. The first guide rod penetrates through the fixing strip and is slidably arranged therewith.

[0009] In one embodiment, the first testing mechanism further includes a slider, a first adjusting arm, a moving plate and an electric push rod; The slider slides on the second guide rod. Two connecting sleeves are arranged on the side wall of the slider facing the lifting seat. The first adjusting arm is arranged on the other side wall of the slider, and a first through hole is opened along the length direction of the first adjusting arm; The electric push rod is installed on the side wall of the lifting seat, and a push block is connected to the end of the push rod of the electric push rod. The moving plate is arranged inside the lifting seat and slides and adjusts along the inner wall of the lifting seat. Two first connecting shafts are arranged on the side wall of the moving plate, and the first connecting shafts can be fixed to the connecting sleeves by inserting.

[0010] In one embodiment, the second testing mechanism includes a mounting seat, a second adjusting arm and a fixing cylinder; A sponge pad is bonded to the side wall of the mounting seat facing the fixing member, and a second connecting shaft is installed on the other side wall of the mounting seat. The second adjusting arm slides vertically between the inner walls of the fixing grooves, and a second through hole is opened along the length direction of the second adjusting arm. A transverse rod penetrates through the bottom end of the second adjusting arm and is in sliding contact with its inner wall. The fixing cylinder is fixed to the side wall of the second adjusting arm. One end of the second connecting shaft always slides between the inner walls of the fixing cylinder, and the second connecting shaft and the fixing cylinder can be fixed by a fastening bolt; Wherein, during the test, the distance that the sponge pad moves linearly to contact the buffer block is equal to the distance that the pressure rod moves vertically to contact the buffer block.

[0011] In one embodiment, the adjusting mechanism further includes a gear seat, a driving gear, a transmission gear and a rotating disk; The gear seat is installed on the base. A synchronous shaft rotatably contacting therewith penetrates between the inner walls of the gear seat. The transmission gear is installed in the middle of the synchronous shaft and rotates synchronously therewith. The driving gear is arranged directly below the transmission gear and meshes with it for transmission. A rotating motor three connected to drive the driving gear is installed on the side wall of the gear seat. Two rotating disks are provided and are respectively installed on the two ends of the synchronous shaft. A moving block slides along the inner wall of the rotating disk. A sliding block is connected to the outer surface of the moving block. One end of the guide bolt is fixed to the sliding block, and the two guide bolts on both sides slide between the inner walls of the first through hole and the second through hole respectively.

[0012] In one embodiment, when the photosensitive member and the light-emitting member are opposite to each other and at the same horizontal height, the bottom surface of the adjusting seat and the bottom surface of the adsorbing member are also in the same plane. The distance between the pressing rod and the top surface of the buffer block is the farthest. The first connecting shaft and the connecting sleeve are exactly in opposite positions and can be connected together in this state. At this time, the first testing mechanism is located at the initial position of the test. During the test, the lifting seat and the adjusting seat are always connected as a whole. The guide bolt connected to the first adjusting arm is in the vertically upward position, and the guide bolt connected to the second adjusting arm is in the horizontal direction. At this time, the second testing mechanism is at the farthest position from the buffer block. When a sliding contact movement occurs between the lifting seat and the adjusting seat, the test has ended or has not started yet. When the adjusting seat moves to contact the lower limiting ring, the distance between the two pressing rods is the largest. When the adjusting seat moves to contact the upper limiting ring, the distance between the two pressing rods is the smallest. During the test, the distance between the two pressing rods always remains the smallest and does not contact the vertical shaft on the fixing member.

[0013] A test method for a fatigue test tooling of a shock absorber buffer block for a new energy vehicle includes the following steps: S1. First, invert and install the buffer block to be tested on the fixing member. Drive the lifting seat to be adjusted from the highest position to the initial position of the test by the vertical downward movement of the adjusting seat, and connect and match the first connecting shaft and the connecting sleeve. At the same time, adjust the position of the second connecting shaft according to the distance between the pressing rod and the top surface of the buffer block. S2. Then, by controlling the rotation of the driving gear, the two rotating disks rotate synchronously. The movement of the first adjusting arm and the second adjusting arm is controlled by the guide bolts on both sides, so that the pressing rod and the mounting seat move towards the buffer block synchronously and apply a force, thereby simulating the influence of the force generated on the buffer block due to the shock absorber and braking inertia when the vehicle decelerates through a speed bump. S3. Then, after the test ends, control the two guide bolts to move to the initial position and stop. Then, make the first connecting shaft leave the connecting sleeve, and disconnect the suction force between the lifting seat and the adjusting seat. Then continue to adjust the lifting seat downward to the lowest position, and control the pressing rods on both sides to clamp the buffer block. After clamping, move upward to the highest position and stop. Remove the buffer block, measure and detect the inner diameter of the middle hole of the buffer block, and obtain the wear degree of the buffer block when the vehicle decelerates through a speed bump according to the inner diameter error.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are: 1. The present invention sets up a first testing mechanism. By the vertical movement of the lifting seat, the pressing rod is driven to apply a reciprocating force to the top surface of the buffer block, simulating the compressive force generated on the buffer block when the shock absorber moves up and down as the vehicle passes over a speed bump. Moreover, the vertical movement of the lifting seat, in cooperation with the adjustment process of the pressing rod, can also clamp the buffer block, making it convenient to clamp and remove the buffer block after testing.

[0015] 2. The present invention sets up a second testing mechanism. By the horizontal linear movement of the mounting seat, in cooperation with the sponge pad, a force is applied to the side surface of the buffer block to simulate the thrust acting on the buffer block due to the deceleration braking inertia when the vehicle passes over a speed bump.

[0016] 3. The present invention sets up an adjustment mechanism. By using the synchronous shaft, the guide bolts on both sides move synchronously. And through the driving of the guide bolts on the first adjustment arm and the second adjustment arm, the movement processes of the first testing mechanism and the second testing mechanism are respectively controlled, and the synchronism of the forces generated by the two mechanisms on the buffer block can also be ensured, so as to better simulate the external force influence on the buffer block when the vehicle passes over a speed bump. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following, in conjunction with the drawings, through a detailed description of the specific embodiments of the present application, will make the technical solutions and other beneficial effects of the present application obvious.

[0018] In the drawings: Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is Figure 1 the front view structural schematic diagram; Figure 3 is the structural schematic diagram of the fixing frame of the present invention and the components installed thereon; Figure 4 is Figure 3 the longitudinal sectional schematic diagram in; Figure 5 is the structural schematic diagram of the first testing mechanism of the present invention; Figure 6 is the connection schematic diagram between the electric push rod, the push block and the moving plate of the present invention; Figure 7 is the structural schematic diagram of the second testing mechanism of the present invention; Figure 8 is the structural schematic diagram of the adjustment mechanism of the present invention.

[0019] In the figure: 1. Base; 11. Operating platform; 2. Fixing piece; 3. Fixing plate; 31. First guide rod; 32. First screw rod; 321. Limit ring; 33. Adjusting seat; 331. Photosensitive part; 34. First bevel gear; 341. First rotating motor; 35. Second bevel gear; 36. Second guide rod; 37. Light-emitting part; 38. First contact sensor; 4. Fixed table; 41. Horizontal rod; 5. First testing mechanism; 51. Lifting seat; 511. Fixed strip; 512. Support plate; 52. Adsorbing part; 521. External power supply; 53. Adjusting gear; 531. Pressing rod; 54. Slide block; 541. First adjusting arm; 542. Connecting sleeve; 55. Moving plate; 551. First connecting shaft; 56. Electric push rod; 561. Pushing block; 6. Second testing mechanism; 61. Mounting seat; 611. Sponge pad; 612. Second connecting shaft; 62. Second adjusting arm; 63. Fixed cylinder; 7. Adjusting mechanism; 71. Gear seat; 72. Driving gear; 73. Driven gear; 731. Synchronous shaft; 74. Rotating disk; 741. Second screw rod; 75. Sliding block; 751. Guide bolt. Detailed implementation manners

[0020] The following disclosure provides many different implementation manners or examples for implementing different structures of the present application. To simplify the disclosure of the present application, components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present application. In addition, the present application may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between various implementation manners and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0021] As Figure 1-6 shown, the present invention provides a technical solution: a fatigue test tooling for a shock absorber buffer block used in a new energy vehicle, including a base 1, a fixing piece 2, a fixing plate 3, and a first testing mechanism 5. An operating platform 11 with a PLC controller is fixedly installed on the base 1. The fixing piece 2 is composed of a cylindrical platform and a vertical shaft. The cylindrical platform is fixedly installed on the base 1 by bolts, and the vertical shaft is installed at the middle of the top of the cylindrical platform by threaded connection. The buffer block used for testing is sleeved on the vertical shaft and contacts the top surface of the cylindrical platform.

[0022] The fixing plate 3 is arranged in an "L" shape. The bottom end of the fixing plate 3 is fixed to the base 1 by bolts. On one of the vertical side walls of the fixing plate 3, a first rotating motor 341 is fixedly installed by bolts. At the end of the output shaft of the first rotating motor 341, a first bevel gear 34 is installed. And on the other vertical side wall of the fixing plate 3, a light-emitting component 37 is embedded. The light-emitting component 37 is an infrared light-emitting diode. An internal power supply (not shown in the figure) for the infrared light-emitting diode to work is arranged inside the fixing plate 3.

[0023] Between the fixing plate 3 and the base 1, two first guide rods 31 and a first screw rod 32 are respectively arranged in the vertical direction. Both ends of the first guide rod 31 are fixed to the fixing plate 3 and the base 1 respectively. The first screw rod 32 is rotatably arranged between the opposite surfaces of the fixing plate 3 and the base 1. Two limiting rings 321 fixedly integrated with it are installed on the first screw rod 32. On the opposite surfaces of the two limiting rings 321, a first contact sensor 38 is embedded. The first contact sensor 38 is electrically connected to the PLC controller of the operating platform 11. And only the outer surface of the first screw rod 32 between the two limiting rings 321 is provided with external threads, and the rest of the part has no thread setting. On the outer surface of the second screw rod 741 close to the base 1, a second bevel gear 35 that rotates synchronously with it is also installed. The second bevel gear 35 is meshed and driven with the first bevel gear 34. And the second bevel gear 35 rotates on the top surface of the base 1 through a bearing.

[0024] Among them, an adjusting seat 33 that is slidably arranged on the outer surface of the first screw rod 32 and is in threaded transmission cooperation with it is provided. A guide block made of iron is fixed to the adjusting seat 33 by screws. The guide block is arranged in a dovetail shape. And on the side wall of the adjusting seat 33 facing the fixing plate 3 in the vertical direction, a light-sensitive component 331 is embedded. The light-sensitive component 331 is a photosensitive sensor. The light-emitting component 37 is matched with the light-sensitive component 331. And the light-sensitive component 331 is electrically connected to the PLC controller. Only when the light-sensitive component 331 moves to the same horizontal height as the light-emitting component 37, the light-sensitive component 331 can receive the light signal emitted by the light-emitting component 37.

[0025] On one of the side walls of the fixing plate 3, a shaft seat is fixedly installed by bolts. A second guide rod 36 is also fixedly installed between the shaft seat and the top surface of the base 1.

[0026] When the vehicle passes over the speed bump, the wheels will quickly move up and down due to the height difference between the speed bump and the road surface, resulting in the continuous compression adjustment of the shock absorber at this time. During the compression process of the shock absorber, the buffer block will be subjected to a certain compression force to prevent the shock absorber from being over-compressed. Therefore, a first testing mechanism 5 is set up to simulate this compression force from the shock absorber received by the buffer block. And since the buffer block is in direct contact with the piston rod, it will also cause friction between it and the piston rod under the action of the compression force of the shock absorber, which has a certain impact on the service life of the buffer block. The specific settings are as follows: The first testing mechanism 5 includes a lifting seat 51, an adsorbing member 52, adjusting gears 53, a slider 54, a moving plate 55 and an electric push rod 56; The lifting seat 51 is arranged in an "L" shape, and a support plate 512 perpendicular to its vertical side wall is fixedly installed on one side wall thereof. A second rotating motor (not shown in the figure) is arranged between the lifting seat 51 and the support plate 512. The second rotating motor is fixed on the bottom wall of the support plate 512. Two adjusting gears 53 that are always meshed and driven are rotatably arranged above the support plate 512. One of the adjusting gears 53 is installed at the end of the output shaft of the second rotating motor, and the other adjusting gear 53 is rotatably arranged on the top surface of the support plate 512 through a shaft connection. Pressing rods 531 arranged in parallel are installed on the top surfaces of the two adjusting gears 53 through fastening bolts.

[0027] Among them, a second contact sensor is embedded on the side wall surfaces of the two pressing rods 531 facing each other. The second contact sensor is in a strip shape to increase the contact induction area. A distance sensor is also embedded on the side wall of one of the pressing rods 531 for detecting the distance change between the two pressing rods 531 (however, the maximum and minimum distances of the distance sensor are preset trigger thresholds). Both the second contact sensor and the distance sensor are electrically connected to the PLC controller. When the distance between the two pressing rods 531 is the minimum value, the distance between them is still greater than the diameter of the vertical shaft on the fixing member 2, that is, the pressing rods 531 will never come into contact with the vertical shaft.

[0028] A groove is formed on the vertical side wall of the lifting seat 51 facing the fixing plate 3. The adsorbing member 52 is installed in the groove by screws. The adsorbing member 52 is an electromagnet. The adsorbing member 52 matches the guide block and the guide block can slide and adjust along the inner wall of the adsorbing member 52. An external power supply 521 is installed on the side wall of the lifting seat 51. The external power supply 521 is electrically connected to the PLC controller, and the external power supply 521 is connected to the electromagnet through a wire. Two fixing strips 511 are also fixed on the side wall of the lifting seat 51 on both sides of the groove by screws. The first guide rod 31 passes through the fixing strip 511 and is in sliding contact with it.

[0029] The electric push rod 56 is fixed on the vertical side wall of the lifting seat 51 by screws and is located below the support plate 512. A cavity (not shown in the figure) is formed inside the lifting seat 51. A moving plate 55 is slidably arranged between the inner walls of the cavity. Two first connecting shafts 551 are installed on the moving plate 55 by means of threaded connection. A pushing block 561 coaxially connected to the moving plate 55 is arranged outside the lifting seat 51. The pushing block 561 is installed at the end of the push rod of the electric push rod 56.

[0030] A slider 54 is slidably arranged on the outer surface of the second guide rod 36. Two connecting sleeves 542 are fixedly installed on the side wall of the slider 54 facing the lifting seat 51 by screws. The first connecting shaft 551 can be fixedly connected with the connecting sleeve 542 by insertion. And a horizontally arranged first adjusting arm 541 is fixedly installed on the other side wall of the slider 54 by screws. A first through hole is opened along the length direction of the first adjusting arm 541.

[0031] It should be further noted that the buffer block is installed upside down on the fixing member 2 (that is, wider at the top and narrower at the bottom as shown in Figure 1 ). Initially, the lifting seat 51 is located at the highest position, that is, the adjusting seat 33 is fixed at the bottom end of the adsorbing member 52 by the suction force (that is, the state where the bottom surface of the adjusting seat 33 and the bottom surface of the adsorbing member 52 are in the same plane). And at this time, the adjusting seat 33 is in contact with the upper limiting ring 321. At this time, the first connecting shaft 551 is completely retracted into the cavity and does not have any connection with the connecting sleeve 542. Then, the lifting seat 51 is adjusted to the test position, that is, the first rotating motor 341 is started through the operating platform 11 to drive the first bevel gear 34 to rotate, thereby controlling the rotation of the second bevel gear 35 and the first screw rod 32. Since the fixing strip 511 can only move along the vertical direction of the first guide rod 31, the adjusting seat 33 is driven by the thread of the first screw rod 32 at this time. By changing the output direction of the first rotating motor 341, the adjusting seat 33 drives the lifting seat 51 to move downward along the vertical direction. When the photosensitive member 331 moves to the same horizontal height as the light-emitting member 37, the photosensitive member 331 transmits an electrical signal to the PLC controller, causing the PLC controller to immediately stop the first rotating motor 341, so that the lifting seat 51 stops moving at this time. And at this time, the first connecting shaft 551 is exactly located at the position opposite to the connecting sleeve 542 (in this state, the guide bolt 751 in the first adjusting arm 541 is in the vertically upward position). Subsequently, the electric push rod 56 is controlled to start through the operating platform 11, and its push rod starts to extend. The moving plate 55 is driven by the push block 561 to move toward the side close to the slider 54 and automatically stops when the electric push rod 56 extends to the maximum distance. At this time, the first connecting shaft 551 is exactly inserted into the connecting sleeve 542. After that, the pressing rod 531 is controlled to reciprocate downward along the vertical direction by the adjusting mechanism 7 to simulate the compression force applied to it by the shock absorber.

[0032] When the vehicle passes over a speed bump, in addition to the compression force applied to the buffer block by the shock absorber, since the brakes will be stepped on for a short-distance braking when passing over the speed bump, and during the braking process, the buffer block will also receive a thrust in the forward direction, making it fit more tightly with the piston rod, which will exacerbate the friction between the buffer block and the piston rod. The specific settings are as follows: Such as Figure 1-2 And Figure 7As shown, a second testing mechanism 6 is also provided on the base 1. The second testing mechanism 6 includes a mounting base 61, a second adjusting arm 62, and a fixing cylinder 63; A fixing table 4 is also fixedly installed on the base 1 by bolts. One end of the fixing table 4 is connected and fixed to the cylindrical platform of the fixing member 2. A fixing groove is provided along the length direction of the fixing table 4. A transverse rod 41 is arranged horizontally in the fixing groove. One end of the transverse rod 41 is fixed on the outer surface of the cylindrical platform, and the other end is fixed on the inner wall of the fixing groove.

[0033] One end of the fixing cylinder 63 is connected and fixed to the second adjusting arm 62. The second adjusting arm 62 is arranged vertically. A through fixing hole is provided at the bottom end of the second adjusting arm 62. The transverse rod 41 passes through the fixing hole and is in sliding contact with it. A through hole two is provided along the length direction of the second adjusting arm 62. A second connecting shaft 612 is installed on the side wall of the mounting base 61 facing the fixing cylinder 63 by means of threaded connection. The other end of the second connecting shaft 612 slides between the inner walls of the fixing cylinder 63. The second connecting shaft 612 and the fixing cylinder 63 are fixed by a fastening bolt. The fastening bolt is arranged on the fixing cylinder 63. A sponge pad 611 is installed on the other side wall of the mounting base 61 by means of adhesion.

[0034] It should be further noted that first, by adjusting the length of the second connecting shaft 612 in the fixing cylinder 63 to change the time point when the sponge pad 611 contacts the buffer block, after adjusting to the appropriate position according to the test requirements, the second connecting shaft 612 is firmly fixed in the fixing cylinder 63 by the fastening bolt. Subsequently, the second adjusting arm 62 makes a reciprocating linear motion along the transverse axis, so that the mounting base 61 drives the sponge pad 611 to continuously apply a force to the side surface of the buffer block opposite to the sponge pad 611, thereby simulating the thrust force on the buffer block generated when the vehicle brakes when passing over a speed bump.

[0035] According to the technical solution described above, when the vehicle decelerates passing over the buffer strip, the compression force exerted by the shock absorber on the buffer block is synchronous with the thrust force generated during deceleration braking. Therefore, this is achieved by setting the adjusting mechanism 7. The specific settings are as follows: As Figure 1-2 and Figure 8 As shown, an adjusting mechanism 7 is also provided on the base 1. The adjusting mechanism 7 includes a gear seat 71, a driving gear 72, a transmission gear 73, a rotating disk 74, and a sliding block 75; The gear seat 71 is fixed on the base 1 by bolts, and the gear seat 71 is arranged adjacent to the fixed table 4. A rotary motor three is installed on one side wall of the gear seat 71 by bolts. A driving gear 72 is rotatably arranged between the side walls of the gear seat 71 through a shaft connection. The rotary motor three is the driving source of the driving gear 72. A synchronizing shaft 731 is arranged through the inner walls of the gear seat 71 in a rotatable contact manner. A transmission gear 73 is fixedly installed in the middle of the synchronizing shaft 731 and rotates synchronously with it. The driving gear 72 is located directly below the transmission gear 73 and the two are meshed for transmission.

[0036] There are two rotating disks 74, which are respectively fixed on the two end parts of the synchronizing shaft 731 by screws. Adjusting grooves are formed in the rotating disks 74. A second screw rod 741 is rotatably arranged between the inner walls of the adjusting grooves along the length direction thereof. One end of the second screw rod 741 is connected with a rotary motor four (not shown in the figure). The rotary motor four is installed inside the rotating disk 74. A moving block (not shown in the figure) is slidably arranged between the inner walls of the adjusting grooves. The sliding block 75 has a square structure and is integrally connected with the moving block. A guide bolt 751 is also installed on the outer surface of the sliding block 75 by means of threaded connection. The guide bolts 751 on the two rotating disks 74 slide and adjust along the inner walls of the through hole one and the through hole two respectively.

[0037] It should be further noted that by starting the rotary motor four through the PLC controller, it drives the second screw rod 741 to rotate and output, thereby controlling the position of the sliding block 75 on the rotating disk 74. By changing the position of the guide bolt 751 (that is, the sliding block 75), the reciprocating movement distance of the first adjusting arm 541 and the second adjusting arm 62 is adjusted, so that the compression force on the buffer block and the thrust on the buffer block can be adjusted according to the test requirements.

[0038] At the initial state of the test, that is, as shown in Figure 1 and Figure 2 the state shown, at this time, the photosensitive element 331 on the adjusting seat 33 and the light-emitting element 37 on the fixing plate 3 are arranged opposite to each other and at the same horizontal height. The first connecting shaft 551 is inserted into the connecting sleeve 542. The guide bolt 751 in the first adjusting arm 541 is in the Figure 2 vertically upward position shown (this position is the highest position of the pressure rod 531 during the test), while the guide bolt 751 in the second adjusting arm 62 is in the Figure 2 horizontally rightward position shown (this position is the position where the mounting seat 61 is farthest from the buffer block), and, at the initial state of the test, the distance between the two pressure rods 531 is the closest; Then, by starting the rotary motor three, it drives the driving gear 72 to rotate, and further makes the transmission gear 73 drive the synchronizing shaft 731 to rotate, so that the two rotating disks 74 rotate synchronously in the Figure 2It rotates clockwise as shown. With the circular motion of the rotating disk 74, during the process that the guide bolt 751 connected to the first testing mechanism 5 moves from the vertically upward position to the vertically downward position, it synchronously drives the pressure rod 531 to move downward and approach the top of the buffer block. After contact, it applies pressure to the top of the buffer block, causing the buffer block to deform until the pressure rod 531 moves to the lowest position. After that, the guide bolt 751 drives the pressure rod 531 to reset upward, and the buffer block recovers. During the process that the guide bolt 751 connected to the second testing mechanism 6 moves from the horizontally rightward position to the horizontally leftward position, it synchronously drives the mounting seat 61 to approach the buffer block. After the sponge pad 611 contacts the buffer block, it applies a thrust to the side of the buffer block, causing the buffer block and the sponge pad 611 to deform simultaneously until the mounting seat 61 moves to the position closest to the buffer block. After that, this guide bolt 751 drives the mounting seat 61 to reset to the side away from the buffer block, and the buffer block recovers.

[0039] During the test, the position of the second connecting shaft 612 in the fixed cylinder 63 is changed by the fastening bolt, which is adjusted according to the distance that the pressure rod 531 moves from the highest position to contact the top surface of buffer blocks of different specifications. The purpose is that no matter which specification of buffer block is tested, when the pressure rod 531 contacts the top surface of the buffer block, the sponge pad 611 also just contacts the side of the buffer block under the drive of the mounting seat 61, so as to control and ensure the synchronization of the compression force and the thrust force.

[0040] In addition, after the test, when the two guide bolts 751 move to their initial positions, it is used as the end state. Since in the initial state during the test, the adjusting seat 33 is fixedly connected to the bottom end of the adsorbing part 52, when it moves to this state again, the adjusting seat 33 contacts the bottom end of the adsorbing part 52. The external power supply 521 is started through the PLC controller, so that an electric current passes through the adsorbing part 52 and generates a suction force, and then the adjusting seat 33 is connected to the lifting seat 51 as a whole again.

[0041] Subsequently, the electric push rod 56 is reset through the PLC controller, so that the electric push rod 56 drives the moving plate 55 to move to the side away from the slider 54 through the push block 561. When the electric push rod 56 is reset, the length of the push rod extending out is the shortest at this time, and the first connecting shaft 551 is completely driven into the cavity. At this time, there is no contact between the first connecting shaft 551 and the connecting sleeve 542.

[0042] Then, the second rotating motor is started through the PLC controller, so that the adjusting gear 53 (i.e., the one on the right) connected to the second rotating motor rotates Figure 5 clockwise as shown, and further causes the other adjusting gear 53 to rotate Figure 5It rotates counterclockwise as shown. At this time, the linear distance between the two pressure bars 531 is the farthest, and the value detected by the distance sensor reaches the maximum value and triggers. The PLC controller stops the second rotating motor (it has rotated 180 degrees at this time). Then, the PLC controller starts the first rotating motor 341 again, causing the adjustment seat 33 to drive the lifting seat 51 to move downward until it contacts the lower limit ring 321. At this time, the contact sensor 38 on the limit ring 321 is triggered. At this time, the two pressure bars are respectively located on both sides of the buffer block. The PLC controller immediately stops the first rotating motor 341, and then starts the second rotating motor again and controls it to rotate in the reverse direction, causing it to drive the adjustment gear 53 to rotate in the reverse direction and drive the two pressure bars 531 to lean against the side wall of the buffer block again. When the side wall of the pressure bar 531 contacts the outer surface of the buffer block, the contact sensor 38 on the pressure bar 531 is triggered. At this time, the PLC controller stops the second rotating motor, and at the same time starts the first rotating motor 341 again, and controls the adjustment seat 33 to drive the lifting seat 51 to move upward, so as to move the buffer block clamped in the middle upward from the fixing member 2 through the two pressure bars 531 until the adjustment seat 33 moves to contact the upper limit ring 321. At this time, the contact sensor 38 on the limit ring 321 is triggered. At this time, the buffer block is moved out along the length direction of the pressure bar 531, and the PLC controller is controlled to continue to output. When the distance between the two pressure bars 531 is the closest, the value detected by the distance sensor reaches the minimum value and triggers, and the PLC controller stops the second rotating motor.

[0043] Finally, by measuring the inner diameter of the middle hole of the buffer block, it can be detected whether there is a situation of inconsistent inner diameters, and the wear degree of the buffer block when the vehicle decelerates through the speed bump can be obtained based on the inner diameter error.

[0044] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be directly connected, or it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the meanings of the above terms in the present application can be understood according to specific circumstances.

[0045] The above has introduced in detail a fatigue test tooling for a shock absorber buffer block used in a new energy vehicle and its test method. In this article, specific examples are used to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of the present application; those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. Fatigue test tooling for a shock absorber buffer block used in a new energy vehicle, comprising: A base (1), on which a fixing member (2) is provided. A buffer block for testing is placed on the fixing member (2). An "L"-shaped fixing plate (3) and a fixing table (4) are also installed on the base (1). A first screw rod (32) is rotatably arranged between the fixing plate (3) and the base (1). An adjusting seat (33) is arranged on the first screw rod (32) in the vertical direction. On one side of the fixing table (4), an operating table (11) with a PLC controller is also provided on the base (1); It is characterized in that it further comprises: A first testing mechanism (5), which is slidably adjusted in the vertical direction and can be integrated with the adjusting seat (33) by suction. Two pressing rods (531) that are always parallel and opposite to each other are arranged on the first testing mechanism (5). The pressing rods (531) can act downward on the top surface of the buffer block and generate a compressive force on it; A second testing mechanism (6), which reciprocates linearly along the length direction of the fixing table (4) and can apply a force to the side surface of the buffer block; An adjusting mechanism (7), which is arranged on one side of the fixing table (4) and on the base (1). Guide bolts (751) are rotatably arranged on both sides of the adjusting mechanism (7). The included angle between the two guide bolts (751) and the rotation center of the adjusting mechanism (7) is always 90 degrees. The two guide bolts (751) can respectively drive and control the first testing mechanism (5) and the second testing mechanism (6), so as to simulate the compressive force from the shock absorber and the thrust generated by braking simultaneously when the vehicle decelerates passing through a speed bump.

2. The fatigue test tooling for a shock absorber buffer used in a new energy vehicle according to claim 1, characterized in that, The fixing member (2) is composed of a cylindrical platform and a vertical shaft. The vertical shaft is installed in the middle of the cylindrical platform in the vertical direction. The cylindrical platform is installed on the base (1). One end of the fixing table (4) is fixedly connected to the outer surface of the cylindrical platform. A fixing groove is opened on the fixing table (4), and a transverse rod (41) is arranged along its length direction in the fixing groove; A first rotating motor (341) is arranged on one of the vertical side walls of the fixing plate (3). A first bevel gear (34) is arranged on the output shaft of the first rotating motor (341). A second bevel gear (35) that rotates synchronously with it is installed on the first screw rod (32). The first bevel gear (34) is meshed with the second bevel gear (35) for transmission. Two limiting rings (321) fixed to the first screw rod (32) are also arranged on the first screw rod (32). Contact sensors (38) are embedded on the opposite surfaces of the two limiting rings (321). External threads are only arranged on the outer surface of the first screw rod (32) between the two limiting rings (321); The adjusting seat (33) reciprocates between the two limiting rings (321). A photosensitive member (331) is embedded on the outer surface of the adjusting seat (33) facing the fixing plate (3). A light-emitting member (37) is embedded on the side wall of the fixing plate (3). Among them, the light-emitting member (37) is an infrared light-emitting diode, and the photosensitive member (331) is a photosensitive sensor; Between the fixed plate (3) and the base (1), there are also provided two first guide rods (31) and one second guide rod (36), and the first guide rods (31) and the second guide rod (36) are both arranged in the vertical direction.

3. The fatigue test tooling for a shock absorber buffer used in a new energy vehicle according to claim 2, characterized in that, The first testing mechanism (5) includes a lifting seat (51), an adjusting gear (53), and a pressing rod (531); The lifting seat (51) is arranged in an "L" shape, and a support plate (512) is installed on one of its vertical side walls. A second rotating motor is installed on the bottom wall of the support plate (512). There are two adjusting gears (53) which are meshed and arranged above the support plate (512). One of the adjusting gears (53) is connected to the output shaft of the second rotating motor. There are two pressing rods (531) which are respectively fixed on the top surfaces of the two adjusting gears (53). The two pressing rods (531) are always relatively parallel. Strip-shaped contact sensors two are embedded on the opposite side walls of the two pressing rods (531). And a distance sensor is also arranged on the side wall of one of the pressing rods (531); An adsorbent (52) is installed on the other vertical side wall of the lifting seat (51) and is fixed thereto. The adsorbent (52) is an electromagnet. A guide block is arranged on the adjusting seat (33). The guide block is arranged in a dovetail shape and is matched with the adsorbent (52). The guide block can slide and adjust along the inner wall of the adsorbent (52). And the guide block and the adsorbent (52) can also be integrated by suction. An external power supply (521) connected to the adsorbent (52) by a wire is installed on the side wall of the lifting seat (51). And two fixing strips (511) are also arranged on the lifting seat (51). The first guide rods (31) penetrate through the fixing strips (511) and are slidably arranged therewith.

4. The fatigue test tooling for a shock absorber buffer used in a new energy vehicle according to claim 3, characterized in that, The first testing mechanism (5) further includes a slider (54), a first adjusting arm (541), a moving plate (55), and an electric push rod (56); The slider (54) slides on the second guide rod (36). Two connecting sleeves (542) are arranged on the side wall of the slider (54) facing the lifting seat (51). The first adjusting arm (541) is arranged on the other side wall of the slider (54). And a first through hole is opened along the length direction of the first adjusting arm (541); The electric push rod (56) is installed on the side wall of the lifting seat (51). And a push block (561) is connected to the end of the push rod of the electric push rod (56). The moving plate (55) is arranged inside the lifting seat (51) and slides and adjusts along the inner wall of the lifting seat (51). Two first connecting shafts (551) are arranged on the side wall of the moving plate (55). The first connecting shafts (551) can be fixed integrally with the connecting sleeves (542) by insertion.

5. The fatigue test tooling for a shock absorber buffer used in a new energy vehicle according to claim 4, characterized in that, The second testing mechanism (6) includes a mounting seat (61), a second adjusting arm (62), and a fixed cylinder (63); A sponge pad (611) is adhesively bonded to the side wall of the mounting base (61) facing the fixing member (2), and a second connecting shaft (612) is installed on the other side wall of the mounting base (61). The second adjusting arm (62) is slidably arranged vertically between the inner walls of the fixing grooves, and a second through hole is formed in the second adjusting arm (62) along its length direction. The transverse rod (41) penetrates through the bottom end of the second adjusting arm (62) and is in sliding contact with its inner wall. The fixed cylinder (63) is fixed to the side wall of the second adjusting arm (62), and one end of the second connecting shaft (612) is always slidable between the inner walls of the fixed cylinder (63), and the second connecting shaft (612) and the fixed cylinder (63) can be fixed by a fastening bolt; Among them, during the test, the distance that the sponge pad (611) moves linearly to contact the buffer block is equal to the distance that the pressing rod (531) moves vertically to contact the buffer block.

6. The fatigue test tooling for a shock absorber buffer used in a new energy vehicle according to claim 5, characterized in that, The adjusting mechanism (7) further includes a gear seat (71), a driving gear (72), a transmission gear (73), and a rotating disc (74); The gear seat (71) is installed on the base (1), and a synchronous shaft (731) that is in rotational contact with it penetrates between the inner walls of the gear seat (71). The transmission gear (73) is installed in the middle of the synchronous shaft (731) and rotates synchronously with it. The driving gear (72) is arranged directly below the transmission gear (73) and meshes with it for transmission. A rotating motor three that is connected to drive the driving gear (72) is installed on the side wall of the gear seat (71). There are two rotating discs (74) which are respectively installed at the two ends of the synchronous shaft (731). A moving block is slidably arranged along the inner wall of the rotating disc (74). A sliding block (75) is connected to the outer surface of the moving block. One end of the guide bolt (751) is fixed to the sliding block (75), and the guide bolts (751) on both sides are respectively slidable between the inner walls of the first through hole and the second through hole.

7. The fatigue test tooling for the shock absorber buffer used in a new energy vehicle according to claim 6, characterized in that, When the photosensitive member (331) and the light-emitting member (37) are opposite to each other and at the same horizontal height, at this time, the bottom surface of the adjusting seat (33) and the bottom surface of the adsorbing member (52) are also in the same plane. The distance between the pressing rod (531) and the top surface of the buffer block is the farthest. The first connecting shaft (551) and the connecting sleeve (542) are also exactly in opposite positions and can be connected together in this state. At this time, the first testing mechanism (5) is located at the initial position of the test. And during the test, the lifting seat (51) and the adjusting seat (33) are always connected as a whole. The guide bolt (751) connected to the first adjusting arm (541) is in the vertically upward position, and the guide bolt (751) connected to the second adjusting arm (62) is in the horizontal direction and at this time the second testing mechanism (6) is at the farthest position from the buffer block; When the lifting seat (51) and the adjusting seat (33) are in a sliding contact motion, the test has ended or has not started at this time. When the adjusting seat (33) moves to contact the lower limit ring (321), the distance between the two pressure rods (531) is the largest. When the adjusting seat (33) moves to contact the upper limit ring (321), the distance between the two pressure rods (531) is the smallest. And during the test, the distance between the two pressure rods (531) always remains the smallest and does not contact the vertical shaft on the fixing member (2).

8. The test method of a fatigue test tooling for a shock absorber buffer of a new energy vehicle according to claim 7, characterized in that, Including the following steps: S1. First, invert and install the buffer block to be tested on the fixing member (2), and drive the lifting seat (51) to be adjusted from the highest position to the initial position of the test by the vertical downward movement of the adjusting seat (33). Connect and match the connecting shaft one (551) with the connecting sleeve (542). At the same time, adjust the position of the connecting shaft two (612) according to the distance between the pressure rod (531) and the top surface of the buffer block; S2. Then, by controlling the rotation of the driving gear (72), the two rotating disks (74) rotate synchronously. The movement of the adjusting arm one (541) and the adjusting arm two (62) is controlled by the guide bolts (751) on both sides, so that the pressure rod (531) and the mounting seat (61) move towards the buffer block synchronously and apply a force, thereby simulating the influence of the force generated by the shock absorber and braking inertia on the buffer block when the vehicle decelerates passing over a speed bump; S3. Then, after the test ends, control the two guide bolts (751) to move to the initial position and stop. Subsequently, make the connecting shaft one (551) leave the connecting sleeve (542), and disconnect the suction force between the lifting seat (51) and the adjusting seat (33). Then continue to adjust the lifting seat (51) downward to the lowest position, and control the pressure rods (531) on both sides to clamp the buffer block. After clamping, move upward to the highest position and stop. Take away the buffer block, measure and detect the inner diameter of the middle hole of the buffer block, and obtain the wear degree of the buffer block when the vehicle decelerates passing over a speed bump according to the inner diameter error.

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