CN113008577A - Fatigue endurance test tool for buffer block of automobile shock absorber - Google Patents

Abstract

The invention belongs to the technical field of automobile shock absorbers and discloses an automobile shock absorber buffer block fatigue endurance test tool which comprises a rotating wheel and two groups of test components symmetrically arranged on two sides of the rotating wheel; a first sliding groove is formed in the middle of the rotating wheel, a first telescopic rod and a first sliding block are arranged in the first sliding groove, the first telescopic rod is used for driving the first sliding block to move in the first sliding groove in a reciprocating mode, a driving shaft is fixed on the first sliding block, and the rotating wheel rotates eccentrically by taking the driving shaft as a rotating shaft; each group of test assemblies comprises a limiting plate and a pressing plate which are parallel to each other, a test cavity capable of containing a buffer block of the shock absorber is formed between the limiting plate and the pressing plate, the limiting plate is positioned, the pressing plate is movably arranged, and the pressing plate reciprocates between the limiting plate and the rotating wheel; the rotating wheel alternately realizes the movement and the reset of the two pressing plates in the eccentric rotation process; therefore, the adjustment of the test impact process can be realized, and the test efficiency can be improved.

Description

Fatigue endurance test tool for buffer block of automobile shock absorber

Technical Field

The invention belongs to the technical field of automobile shock absorbers, and particularly relates to a fatigue endurance test tool for a buffer block of an automobile shock absorber.

Background

The shock absorber in the automobile suspension system is a core part, and a buffer block is needed to protect the shock absorber during the motion process of a piston rod of the shock absorber so as to prevent the piston from colliding with the bottom of a shock absorber cylinder. Generally, the vehicle has a large up-and-down bouncing speed in the moving process, and the impact force is also large, so that the buffer block is required to have good impact deformation resistance and proper rigidity, and therefore, when the automobile shock absorber buffer block is produced, the fatigue durability of the buffer block needs to be tested and detected.

At present, the hydraulic drive system is adopted mostly to the fatigue test equipment of widely used, specifically is the fixed of realizing the bumper shock absorber buffer block through location structure, then strikes repeatedly the bumper shock absorber buffer block based on hydraulic drive system to this reaches experimental effect. However, such devices still have certain drawbacks in practical use, such as: the shock strength and the shock process are not convenient to adjust, and only one shock absorber buffer block can be tested in one-time operation, so that the test efficiency is low.

Disclosure of Invention

In view of the above, in order to solve the problems in the background art, the present invention provides a fatigue endurance test tool for a bumper of an automobile shock absorber.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an automobile shock absorber bumper block fatigue endurance test frock, includes:

a rotating wheel; a first sliding groove is formed in the middle of the rotating wheel, a first telescopic rod and a first sliding block are arranged in the first sliding groove, the first telescopic rod is used for driving the first sliding block to move in the first sliding groove in a reciprocating mode, a driving shaft is fixed on the first sliding block, and the rotating wheel rotates eccentrically by taking the driving shaft as a rotating shaft;

the two groups of test assemblies are symmetrically arranged on two sides of the rotating wheel; each group of test assemblies comprises a limiting plate and a pressing plate which are parallel to each other, a test cavity capable of containing a buffer block of the shock absorber is formed between the limiting plate and the pressing plate, the limiting plate is positioned, the pressing plate is movably arranged, and the pressing plate reciprocates between the limiting plate and the rotating wheel; the rotating wheel alternately realizes the movement and the reset of the two pressing plates in the eccentric rotation process.

Preferably, the test fixture further comprises: a limiting rod; and each limiting plate is at least provided with a limiting rod in a penetrating manner, the limiting rods are in sliding fit with the limiting plates, one end of each limiting rod is limited in a shock absorber buffer block in the test cavity, and a limiting spring is connected between the other end of each limiting rod and the corresponding limiting plate.

Preferably, one side of the limiting plate, which is far away from the pressing plate, is connected with a telescopic limiting device, and the telescopic limiting device is used for telescopically adjusting the farthest distance between the limiting plate and the pressing plate.

Preferably, the test fixture further comprises: a drive device; the driving device is matched with the driving shaft and drives the rotating wheel to rotate through the driving shaft; the driving device includes:

mounting a plate; a second sliding groove is formed in the mounting plate, a second telescopic rod and a second sliding block are arranged in the second sliding groove, the second telescopic rod is used for driving the second sliding block to move in the second sliding groove in a reciprocating mode, and the driving shaft penetrates through the second sliding groove; the first sliding groove is parallel to the second sliding groove, and the first sliding block and the second sliding block move in the same direction and synchronously;

a limiting ring; the driving shaft and the limiting ring are in running fit with the second sliding block;

a drive motor; the driving shaft is fixedly arranged on the mounting plate and used for driving the driving shaft to rotate.

Preferably, a transmission mechanism is connected between the driving motor and the driving shaft, and the transmission mechanism comprises three transmission wheels and a transmission belt sleeved on the transmission wheels; the three driving wheels are respectively a driving wheel I, a driving wheel II and a driving wheel III, the driving wheel I is fixedly sleeved on the driving shaft, the driving wheel II is rotatably connected with the driving motor, and the driving wheel III is movably arranged on the mounting plate.

Preferably, a third sliding groove is formed in the mounting plate, a third sliding block and a positioning spring are arranged in the third sliding groove and are connected with each other, the third driving wheel is rotatably mounted on the third sliding block, and the positioning spring is used for keeping the transmission belt tensioned.

Preferably, the test fixture further comprises: two installation risers that the symmetry set up, just runner and two sets of test assembly all set up between two installation risers, drive arrangement is fixed to be set up in installation riser top.

Preferably, the test tool further comprises a positioning assembly, the positioning assembly comprises an infrared receiving and transmitting component and a reflecting component, the infrared receiving and transmitting component is embedded and fixed on the inner side wall of one of the mounting vertical plates, the reflecting component is embedded and fixed on the outer side wall of the rotating wheel, and when the infrared receiving and transmitting component corresponds to the reflecting component, the first sliding groove is perpendicular to the pressing plate.

Preferably, the experimental frock still includes the pay-off subassembly, just the pay-off subassembly includes:

a conveyor belt positioned below the test assembly; at least two through holes are formed in the conveying belt at equal intervals;

the storage seat is placed on the conveying belt and used for horizontally placing a damper buffer block to be tested;

the bottom plate is fixed between the two vertical mounting plates; the bottom plate runs through the conveyer belt, and the bottom plate top is fixed with elevating system, elevating system is located the test chamber below, and the through-hole can be passed at the elevating system top to the drive is put thing seat and bumper shock absorber buffer block and is risen to the test intracavity.

Preferably, the lifting mechanism comprises a lifting driving device and a lifting plate which are sequentially connected from bottom to top; arranging a first limiting bulge on the surface of the conveyor belt, wherein the first limiting bulge surrounds the outer side of the through hole; the bottom of the object placing seat is provided with a second limiting bulge, the second limiting bulge can be matched into the first limiting bulge, and the lifting plate can be matched into the second limiting bulge.

Compared with the prior art, the invention has the following beneficial effects:

(1) the rotating wheel with the adjustable rotating center is arranged, so that the test impact process and impact strength of the whole tool can be effectively adjusted through changing the eccentric distance, different test requirements are met, and the accuracy of test results is improved; in addition, two sets of test components are symmetrically matched on two sides of the rotating wheel, so that the whole tool can simultaneously execute tests of the shock absorber buffer blocks, and further the test efficiency is effectively improved.

(2) To above-mentioned test assembly, mainly including the limiting plate and the clamp plate of mutually supporting, and slide on the limiting plate and run through and set up at least one gag lever post, effectively improve the stability of every bumper shock absorber buffer block location when experimental from this.

(3) To above-mentioned limiting plate, the cooperation is equipped with flexible stop device, and flexible stop device is used for the furthest distance between flexible adjustment limiting plate and the clamp plate, makes whole frock can effectively be applicable to the bumper shock absorber buffer block of different length from this.

(4) To above-mentioned runner, correspond to be equipped with including drive mechanism's drive arrangement, specifically: the transmission mechanism comprises three transmission wheels and a transmission belt, wherein the two transmission wheels are respectively fixed with the driving shaft and the driving motor, and the other transmission wheel can move elastically, so that the transmission mechanism can always keep effective tensioning in the process of adjusting the rotation center of the rotating wheel, and further the driving of the driving shaft and the rotating wheel can be stably realized by the driving motor.

(5) The rotating wheel is correspondingly provided with the positioning assemblies, so that the initial position of the rotating wheel is effectively determined, and the initial positioning state of the two groups of test assemblies can be conveniently adjusted.

(6) Aiming at the test assembly, the feeding assembly is correspondingly arranged and is matched with the telescopic limiting device, so that the automatic feeding and discharging operation of the buffer block of the shock absorber can be effectively realized.

(7) To above-mentioned pay-off subassembly, correspond to be equipped with lifter plate, first spacing arch and the spacing arch of second of mutually supporting to this stability of bumper shock absorber buffer block when autoloading and lift is effectively improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a plan view of the rotor of the present invention in cooperation with a test assembly;

FIG. 3 is a schematic structural diagram of a driving device according to the present invention;

FIG. 4 is a schematic view of the driving shaft and the second slider according to the present invention;

FIG. 5 is a schematic structural view of the feeding assembly of the present invention in cooperation with the mounting vertical plate;

FIG. 6 is a schematic view of the structure of the conveyor belt and the storage holder of the present invention;

FIG. 7 is a schematic view of the object holder of the present invention;

in the figure: a rotating wheel-1; a first chute-11; a first telescopic rod-12; a first slider-13; a drive shaft-14; a limiting ring-15; test component-2; a limiting plate-21; a platen-22; a limiting rod-23; a limiting spring-24; a telescopic limiting device-25; a drive device-3; a mounting plate-31; a second chute-32; a second telescopic rod-33; a second slider-34; a drive motor-35; -36, a transmission mechanism; a third chute-37; a third slider-38; a positioning spring-39; installing a vertical plate-4; a positioning component-5; a feeding assembly-6; a conveyor belt-61; a through-hole-62; an article placing seat-63; a bottom plate-64; a lifting drive-65; a lifter plate-66; a first limit projection-67; a second limit projection-68.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

Referring to fig. 1 to 4, in an embodiment of the present invention, a fatigue endurance test tool for a buffer block of an automobile shock absorber is provided, which mainly includes:

a rotating wheel 1;

the two groups of test assemblies 2 are symmetrically arranged on two sides of the rotating wheel 1;

the driving device 3 is used for driving the rotating wheel 1 to rotate;

the mounting vertical plate 4 is used for mounting the test assembly 2 and the driving device 3;

and the positioning assembly 5 is used for realizing the initial position positioning of the rotating wheel 1.

As described above

With respect to the runner 1: the middle part of the rotating wheel 1 is provided with a first sliding chute 11, a first telescopic rod 12 and a first sliding block 13 are arranged in the first sliding chute 11, the first telescopic rod 12 is used for driving the first sliding block 13 to reciprocate in the first sliding chute 11, a driving shaft 14 is fixed on the first sliding block 13, and the rotating wheel 1 rotates eccentrically by taking the driving shaft 14 as a rotating shaft. Specifically, as can be seen from fig. 2, when the first sliding block 13 is positioned at the initial position, the center of the cross section of the driving shaft 14 coincides with the center of the rotating wheel 1, and at this time, the rotating wheel 1 does not perform eccentric rotation; when the first sliding block 13 moves in the first sliding chute 11, the center of the cross section of the driving shaft 14 is dislocated from the center of the rotating wheel 1, so that the rotating wheel 1 can eccentrically rotate by taking the driving shaft 14 as a rotating shaft.

With respect to two sets of test assemblies 2: each group of test assemblies 2 comprises a limiting plate 21 and a pressing plate 22 which are parallel to each other, a test cavity capable of containing a shock absorber buffer block is formed between the limiting plate 21 and the pressing plate 22, the limiting plate 21 is positioned, the pressing plate 22 is movably arranged, and the pressing plate 22 reciprocates between the limiting plate 21 and the rotating wheel 1; the rotating wheel 1 alternately realizes the movement and the reset of the two pressure plates 22 in the process of eccentric rotation.

From the above and with reference to fig. 2, the two sets of test assemblies 2 are respectively a/b, wherein a forms a state in which the test chamber is compressed in the initial state, and b forms a state in which the test chamber is not compressed in the initial state, thereby effectively ensuring that the two sets of test assemblies 2 can form the effect of the alternate test. Specifically, runner 1 when eccentric rotation, can refer to the change of solid line circle to dotted line circle in fig. 2, wherein runner 1 is located when solid line circle position department, is in initial condition, and the experimental chamber of a is compressed this moment, and when runner 1 rotates to dotted line circle position department, accomplishes 180 rotation at least, and based on runner 1's injecion this moment, then can make the experimental chamber of b compressed, and the experimental chamber of a that corresponds then forms under the resilience of its inside bumper shock absorber buffer block of placing and resets.

In conclusion, the eccentric distance of the rotating wheel 1 can be changed by moving the positioning position of the driving shaft 14, so that the impact process and the impact strength in the test process are effectively changed; in addition, the alternate test of the two groups of test assemblies 2 is realized in the eccentric rotation process, so that the test efficiency of the whole tool can be effectively improved.

Furthermore, each limiting plate 21 is at least provided with a limiting rod 23 in a penetrating manner, the limiting rod 23 is in sliding fit with the limiting plate 21, one end of the limiting rod 23 is limited in a shock absorber buffer block in the test chamber, and a limiting spring 24 is connected between the other end of the limiting rod 23 and the limiting plate 21. Based on this, when placing the bumper shock absorber buffer block in experimental intracavity, can make gag lever post 23 insert the centre bore in the middle of the bumper shock absorber buffer block, further realize the stable location of bumper shock absorber buffer block from this to guarantee the stability of bumper shock absorber buffer block location in the whole test process. In addition, based on the sliding of the limiting rod 23 and the arrangement of the limiting spring 24, the limiting rod 23 cannot interfere with the moving extrusion of the pressing plate 22, and meanwhile, the automatic reset of the limiting rod 23 can be effectively realized.

Furthermore, one side of the limiting plate 21, which is far away from the pressing plate 22, is connected with a telescopic limiting device 25, and the telescopic limiting device 25 is used for telescopically adjusting the farthest distance between the limiting plate 21 and the pressing plate 22, so that the whole tool can be effectively applied to shock absorber buffer blocks with different lengths. Specifically, the telescopic limiting device 25 may be a telescopic cylinder, an electric telescopic rod, or the like.

As for the driving device 3, it includes:

a mounting plate 31; a second chute 32 is formed in the mounting plate 31, a second telescopic rod 33 and a second sliding block 34 are arranged in the second chute 32, the second telescopic rod 33 is used for driving the second sliding block 34 to reciprocate in the second chute 32, and the driving shaft 14 penetrates through the second chute 32; the first sliding chute 11 is parallel to the second sliding chute 32, and the first sliding block 13 and the second sliding block 34 move in the same direction and synchronously;

a retainer ring 15; the driving shaft 14 is sleeved on the driving shaft and is embedded in the second sliding block 34, and the driving shaft 14 and the limiting ring 15 are in running fit with the second sliding block 34;

a drive motor 35; is fixedly arranged on the mounting plate 31 and is used for driving the driving shaft 14 to rotate

A transmission mechanism 36; is connected between the driving motor 35 and the driving shaft 14, and the transmission mechanism 36 comprises three transmission wheels and a transmission belt sleeved on the transmission wheels; the three driving wheels are respectively a driving wheel I, a driving wheel II and a driving wheel III, the driving wheel I is fixedly sleeved on the driving shaft 14, the driving wheel II is rotatably connected with the driving motor 35, and the driving wheel III is movably arranged on the mounting plate 31. Specifically, a third sliding groove 37 is formed in the mounting plate 31, a third sliding block 38 and a positioning spring 39 which are connected with each other are arranged in the third sliding groove 37, a third driving wheel is rotatably mounted on the third sliding block 38, and the positioning spring 39 is used for keeping the tension of the driving belt.

As can be seen from the above, the principle of driving the driving wheel 1 to rotate by the driving device 3 is as follows:

when the position of the driving shaft 14 is adjusted, the first telescopic rod 12 and the second telescopic rod 33 are synchronously driven (preferably, an electric telescopic rod is adopted), so that the first sliding block 13 and the second sliding block 34 move in the same direction and synchronously;

when the driving shaft 14 moves, the first driving wheel moves along with the driving shaft, so that the relative positions of the first driving wheel, the second driving wheel and the third driving wheel are changed, and further the tensioning degree of a driving belt is changed; in this state, the force balance between the driving belt and the third driving wheel is broken, for example, when the driving shaft 14 moves away from the second telescopic rod 33, the tension degree of the driving belt increases, so that the pulling force generated on the third driving wheel increases, and the third sliding block 38 is driven to approach the driving shaft 14 (the third sliding block 38 moves along the third sliding groove 37), so as to stretch the positioning spring 39, so that the third sliding block 38 is in dynamic balance again through the cooperation between the resilience force of the positioning spring 39 and the pulling force of the driving belt, thereby ensuring that the entire driving mechanism 36 always has a stable driving effect.

When the driving motor 35 is started, the first driving wheel is driven to rotate, the first driving wheel drives the driving belt to drive through friction, the second driving wheel and the third driving wheel are driven to rotate, and finally the driving shaft 14 and the rotating wheel 1 are driven to rotate.

With respect to mounting riser 4: the symmetry is provided with two, and runner 1 and two sets of test subassembly 2 all set up between two installation risers 4, and drive arrangement 3 is fixed to be set up in installation riser 4 top or bottom. Based on this, realize overall structure's reasonable assembly and stable installation.

The positioning component 5: the positioning assembly 5 comprises an infrared transceiving component and a reflecting component, the infrared transceiving component is embedded and fixed on the inner side wall of one of the mounting vertical plates 4, the reflecting component is embedded and fixed on the outer side wall of the rotating wheel 1, and when the infrared transceiving component corresponds to the reflecting component, the first sliding groove 11 is perpendicular to the pressing plate 22. Based on this, when the infrared transmitting/receiving member corresponds to the reflecting member, it is determined that the jog dial 1 is at the initial position (as shown by the solid circle in fig. 2), and in this position, the minimum distance between the middle pressing plate 22 and the stopper plate 21 is adjusted to be a, and the maximum distance between the middle pressing plate 22 and the stopper plate 21 is adjusted to be b. In conclusion, the positioning of the positioning component 5 is utilized to effectively realize the adjustment of the initial positioning states of the two groups of test components, thereby ensuring the accuracy of the test result.

Example two

Referring to fig. 1 to 7, in this embodiment, a feeding assembly 6 for realizing automatic feeding of a bumper of a shock absorber is further added on the basis of the first embodiment (only suitable for the driving device 3 being fixedly arranged on the top of the mounting vertical plate 4); the specific feeding assembly 6 comprises:

a conveyor belt 61 located below the test module 2; at least two through holes 62 are equidistantly arranged on the conveyor belt 61;

the storage seat 63 is placed on the conveyor belt 61, and the storage seat 63 is used for horizontally placing a damper buffer block to be tested;

a bottom plate 64 fixed between the two mounting vertical plates 4; the bottom plate 64 penetrates through the conveyor belt 61, the lifting mechanism is fixed to the top of the bottom plate 64 and located below the test chamber, and the top of the lifting mechanism can penetrate through the through hole 62 and drive the object placing seat 63 and the shock absorber buffer block to rise into the test chamber.

The above preferred:

the lifting mechanism comprises a lifting driving device 65 and a lifting plate 66 which are connected in sequence from bottom to top;

a first limiting bulge 67 is arranged on the surface of the conveyor belt 61, and the first limiting bulge 67 surrounds the outer side of the through hole 62;

the bottom of the storage base 63 is provided with a second limiting protrusion 68, the second limiting protrusion 68 can be matched with the first limiting protrusion 67, and the lifting plate 66 can be matched with the second limiting protrusion 68.

In summary, the automatic feeding principle for realizing the buffer block of the shock absorber in the embodiment is as follows:

in the initial position, the feeding of b in fig. 2 is performed first;

referring to fig. 6 and 7, a corresponding placing groove may be formed at the top of the object placing seat 63 for stably placing the shock absorber buffer block to be tested.

Then, will put thing seat 63 and place on conveyer belt 61, guarantee when specifically placing that the spacing arch 68 of second of putting thing seat 63 bottom can just block to the first spacing arch 67 on conveyer belt 61 surface in, realize the accurate positioning of putting thing seat 63 and bumper shock absorber buffer block from this.

The conveyor belt 61 is started to convey the object placing seat 63 and the shock absorber buffer block to the corresponding position of the lifting mechanism (test chamber), and at this time, the lifting plate 66 just corresponds to the through hole 62.

Starting the lifting driving device 65 (which may be a lifting hydraulic cylinder or a lifting air cylinder) to drive the lifting plate 66 to rise, wherein the lifting plate 66 passes through the through hole 62 and is just clamped into the second limiting protrusion 68, thereby driving the object placing seat 63 to rise; meanwhile, the telescopic limiting device 25 is started to drive the limiting plate 21 to be far away from the pressing plate 22, so that the interference of the arrangement of the limiting rod 23 on the feeding of the buffer block of the shock absorber is avoided; the lifting driving device 65 drives the shock absorber buffer block on the object placing seat 63 to enter the test chamber, and the center of the shock absorber buffer block and the center of the limiting rod 23 are ensured to be at the same height;

and resetting the telescopic limiting device 25 to enable the limiting plate 21 to be close to the pressing plate 22, and simultaneously enabling the limiting rod 23 to be inserted into the shock absorber buffer block to finish feeding. After the telescopic limiting device 25 is reset, the shock absorber buffer block between the limiting plate 21 and the pressing plate 22 is not compressed.

After the feeding of the b is finished, the rotating wheel 1 is driven to rotate 180 degrees by the driving motor 35, the feeding of the a is executed at the moment, and the feeding principle is the same as that of the b.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. The utility model provides an automobile shock absorber bumper block fatigue endurance test frock which characterized in that includes:

a runner (1); a first sliding groove (11) is formed in the middle of the rotating wheel (1), a first telescopic rod (12) and a first sliding block (13) are arranged in the first sliding groove (11), the first telescopic rod (12) is used for driving the first sliding block (13) to move in the first sliding groove (11) in a reciprocating mode, a driving shaft (14) is fixed on the first sliding block (13), and the rotating wheel (1) rotates eccentrically by taking the driving shaft (14) as a rotating shaft;

the two groups of test assemblies (2) are symmetrically arranged on two sides of the rotating wheel (1); each group of test assemblies (2) comprises a limiting plate (21) and a pressing plate (22) which are parallel to each other, a test cavity capable of containing a shock absorber buffer block is formed between the limiting plate (21) and the pressing plate (22), the limiting plate (21) is positioned, the pressing plate (22) is movably arranged, and the pressing plate (22) reciprocates between the limiting plate (21) and the rotating wheel (1); the rotating wheel (1) alternately realizes the movement and the reset of the two pressing plates (22) in the eccentric rotating process.

2. The automobile shock absorber bumper block fatigue endurance test frock of claim 1, further comprising:

a stopper rod (23); every all run through on limiting plate (21) and be equipped with a gag lever post (23) at least, gag lever post (23) and limiting plate (21) sliding fit, and the one end of gag lever post (23) is injectd in the bumper shock absorber buffer in the test chamber, is connected with spacing spring (24) between the other end and limiting plate (21).

3. The automobile shock absorber bumper block fatigue endurance test frock of claim 1, characterized in that: one side of the limiting plate (21) far away from the pressing plate (22) is connected with a telescopic limiting device (25), and the telescopic limiting device (25) is used for telescopically adjusting the farthest distance between the limiting plate (21) and the pressing plate (22).

4. The automobile shock absorber bumper block fatigue endurance test frock of claim 1, further comprising: a drive device (3); the driving device (3) is matched with a driving shaft (14) and drives the rotating wheel (1) to rotate through the driving shaft (14);

the drive device (3) comprises:

a mounting plate (31); a second sliding chute (32) is formed in the mounting plate (31), a second telescopic rod (33) and a second sliding block (34) are arranged in the second sliding chute (32), the second telescopic rod (33) is used for driving the second sliding block (34) to move in the second sliding chute (32) in a reciprocating mode, and the driving shaft (14) penetrates through the second sliding chute (32); the first sliding chute (11) is parallel to the second sliding chute (32), and the first sliding block (13) and the second sliding block (34) move in the same direction and synchronously;

a stop collar (15); the driving shaft (14) is sleeved on the driving shaft and is embedded in the second sliding block (34), and the driving shaft (14) and the limiting ring (15) are in running fit with the second sliding block (34);

a drive motor (35); the driving shaft is fixedly arranged on the mounting plate (31) and is used for driving the driving shaft (14) to rotate.

5. The automobile shock absorber bumper block fatigue endurance test frock of claim 4, characterized in that: a transmission mechanism (36) is connected between the driving motor (35) and the driving shaft (14), and the transmission mechanism (36) comprises three transmission wheels and a transmission belt sleeved on the transmission wheels; the three driving wheels are respectively a driving wheel I, a driving wheel II and a driving wheel III, the driving wheel I is fixedly sleeved on the driving shaft (14), the driving wheel II is rotatably connected with the driving motor (35), and the driving wheel III is movably arranged on the mounting plate (31).

6. The automobile shock absorber bumper block fatigue endurance test frock of claim 5, characterized in that: a third sliding groove (37) is formed in the mounting plate (31), a third sliding block (38) and a positioning spring (39) which are connected with each other are arranged in the third sliding groove (37), the third driving wheel is rotatably mounted on the third sliding block (38), and the positioning spring (39) is used for keeping the tension of the driving belt.

7. The automobile shock absorber bumper block fatigue endurance test frock of claim 4, further comprising: two installation risers (4) that the symmetry set up, just runner (1) and two sets of test subassembly (2) all set up between two installation risers (4), drive arrangement (3) fixed set up in installation riser (4) top.

8. The automobile shock absorber bumper block fatigue endurance test frock of claim 7, characterized in that: the positioning device is characterized by further comprising a positioning assembly (5), the positioning assembly (5) comprises an infrared receiving and transmitting component and a reflecting component, the infrared receiving and transmitting component is embedded and fixed on the inner side wall of one of the mounting vertical plates (4), the reflecting component is embedded and fixed on the outer side wall of the rotating wheel (1), and when the infrared receiving and transmitting component corresponds to the reflecting component, the first sliding groove (11) is perpendicular to the pressing plate (22).

9. The fatigue endurance testing tool for the buffer block of the automobile shock absorber according to claim 7, further comprising a feeding assembly (6), wherein the feeding assembly (6) comprises:

a conveyor belt (61) located below the test assembly (2); at least two through holes (62) are arranged on the conveyor belt (61) at equal intervals;

the storage seat (63) is placed on the conveyor belt (61), and the storage seat (63) is used for horizontally placing a damper buffer block to be tested;

a bottom plate (64) fixed between the two mounting vertical plates (4); the bottom plate (64) runs through the conveyor belt (61), the top of the bottom plate (64) is fixed with a lifting mechanism, the lifting mechanism is located below the test cavity, and the top of the lifting mechanism can penetrate through the through hole (62) and drive the object placing seat (63) and the shock absorber buffer block to rise into the test cavity.

10. The automobile shock absorber bumper block fatigue endurance test frock of claim 9, characterized in that:

the lifting mechanism comprises a lifting driving device (65) and a lifting plate (66) which are sequentially connected from bottom to top;

a first limiting bulge (67) is arranged on the surface of the conveyor belt (61), and the first limiting bulge (67) surrounds the outer side of the through hole (62);

the bottom of the article placing seat (63) is provided with a second limiting protrusion (68), the second limiting protrusion (68) can be matched into the first limiting protrusion (67), and the lifting plate (66) can be matched into the second limiting protrusion (68).

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