Dynamic endurance test device for automobile bushing

Abstract

The invention discloses an automobile bushing dynamic endurance test device, and relates to the technical field of automobile bushing test, the automobile bushing dynamic endurance test device comprises a base, the top end of the base is fixedly connected with a servo motor, the output end of the servo motor is fixedly connected with a torsion sensor, the output end of the torsion sensor is fixedly connected with a worm, and the output end of the worm is fixedly connected with a motor. By arranging the inner supporting plate and the outer clamping plate, the telescopic sleeve slides to drive the connecting rod to move, so that the connecting rod moves to drive the limiting rod on one side of the inner supporting plate to slide along the inner wall of the fixing frame, and then the inner supporting plate slides to be attached to the lining inner pipe, so that fixing operation of the lining inner pipe and the fixing frame is achieved; the telescopic sleeve slides to drive the linkage plate to slide through the connecting ring, the linkage plate slides to drive the outer clamping plate to slide along the inner wall of the working sleeve through the linkage groove, then the outer clamping plate slides to be attached to the lining outer pipe, positioning operation of the lining outer pipe and the working sleeve is achieved, and rapid installation operation of the automobile lining is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of automobile bushing testing, in particular to a dynamic durability testing device for automobile bushings. Background Art

[0002] At present, rubber bushings are increasingly used in automobile suspension systems as an important component of vehicle chassis parts to attenuate the vibration and impact caused by high-speed driving of the car. Bushings are important parts on the car, so the detection of bushing parts is particularly important.

[0003] For example, the patent with announcement number CN109932172B discloses a dynamic durability test device for automobile bushings, including a bushing test device body, a mounting plate, a fixing frame, a workbench, a clamp, a mounting shaft, a vibration bushing test assembly, a rotation bushing test assembly, a support rod, a support foot and a bearing. Mounting plates are welded and fixed on the inner walls on both sides of the middle part of the bushing test device body, fixing frames are welded and fixed on the outer walls on both sides of the top end of the mounting plate, and a workbench is welded and fixed on the outer wall of the top end of the fixing frame of the bushing test device body. The dynamic durability test device for automobile bushings has a relatively simple structure. The axial dynamic durability test of automobile bushings can be carried out by setting the vibration bushing test assembly, and the circumferential dynamic durability test of automobile bushings can be carried out by setting the rotation bushing test assembly, which solves the problem that traditional bushing test machines can only carry out fatigue tests in one direction and the durability tests of bushings in each direction need to be carried out separately.

[0004] When the existing automobile bushing dynamic durability test device is in use, the automobile bushing is prone to shaking during installation, resulting in a large test error of the automobile bushing, which does not meet people's use needs. For this reason, we propose a dynamic durability test device for automobile bushings. Summary of the invention

[0005] The object of the present invention is to provide a dynamic durability test device for automobile bushings, so as to solve the problem in the above background technology that automobile bushings are prone to shaking during installation, resulting in large test errors for automobile bushings.

[0006] To achieve the above object, the present invention provides the following technical solution: An automotive bushing dynamic durability test device, including a base, a servo motor is fixedly connected to the top end of the base, a torque sensor is fixedly connected to the output end of the servo motor, a worm is fixedly connected to the output end of the torque sensor, a working sleeve is sleeved on the outer wall of the worm, a fixed frame is fixedly connected to one end of the worm, a fastening screw is arranged at one end of the fixed frame, a telescopic sleeve is threadedly connected to the outer wall of the fastening screw, a connecting rod is rotatably connected to the outer wall of the telescopic sleeve, an inner support plate is rotatably connected to one end of the connecting rod, a limiting rod which is fixedly connected to the outer wall of the inner support plate and slidably connected to the inner wall of the fixed frame is provided, a bushing inner tube is attached to the outer wall of the inner support plate away from the limiting rod, a connecting ring is rotatably connected to one end of the telescopic sleeve, a linkage plate which is fixedly connected to the outer wall of the connecting ring and axially slidably connected to the inner wall of the working sleeve is provided, a linkage groove is formed at one end of the linkage plate, an outer clamping plate which is movably connected to the groove of the linkage groove and radially slidably connected to the inner wall of the working sleeve is provided, a bushing outer tube which is attached to the inner wall of the outer clamping plate and sleeved on the outer wall of the bushing inner tube is provided, and a rubber tube is arranged at the connecting part of the bushing outer tube and the bushing inner tube.

[0007] Based on the above structure, the telescopic sleeve slides to drive the connecting rod to move, so that the connecting rod moves to drive the limiting rod on one side of the inner support plate to slide along the inner wall of the fixed frame. Furthermore, the inner support plate slides to fit with the bushing inner tube, realizing the fixing operation of the bushing inner tube and the fixed frame. At the same time, the telescopic sleeve slides to drive the linkage plate to slide through the connecting ring, and the linkage plate slides to drive the outer clamping plate to slide along the inner wall of the working sleeve through the linkage groove. Furthermore, the outer clamping plate slides to fit with the bushing outer tube, realizing the positioning operation of the bushing outer tube and the working sleeve, facilitating the quick installation operation of the automotive bushing.

[0008] Preferably, a connecting frame is fixedly connected to the top end of the working sleeve, a bracket which is fixedly connected to the top end of the base is fixedly connected to the outer wall of the connecting frame, a connecting shaft is rotatably connected to the inner wall of the connecting frame, a worm gear which is meshed with the outer wall of the worm is rotatably connected to the outer wall of the connecting shaft, a positioning frame which is sleeved on the outer wall of the connecting shaft is fixedly connected to the outer wall of the bracket, and a monitoring frame is fixedly connected to the outer wall of the positioning frame. During operation, the servo motor works to drive the worm to rotate reciprocally, and a dynamic durability test is carried out on the torque generated by the relative rotation of the bushing inner tube and the bushing outer tube through the torque sensor. At the same time, the rotation of the worm drives the worm gear to rotate around the connecting shaft through gear meshing.

[0009] Preferably, four groups of connecting rods and four groups of linkage plates are provided, and the four groups of connecting rods and the four groups of linkage plates are evenly distributed in a circumferential manner at equal angles with respect to the central axis of the fixed frame. During operation, by providing four groups of connecting rods and four groups of linkage plates, it is beneficial to realize the stable positioning operation of the bushing inner tube and the bushing outer tube.

[0010] Preferably, an inner support fixing structure is formed between the inner support plate, the telescopic sleeve and the connecting rod and the inner tube of the bushing. The connecting part of the inner support plate and the inner tube of the bushing is arc-shaped. During operation, the telescopic sleeve slides to drive the connecting rod to move, so that the connecting rod drives the limiting rod on one side of the inner support plate to slide along the inner wall of the fixed frame. Furthermore, the inner support plate slides to fit with the inner tube of the bushing, realizing the fixing operation of the inner tube of the bushing and the fixed frame.

[0011] Preferably, the outer shape of the linkage groove is inclined. A clamping structure is formed between the outer clamping plate and the outer tube of the bushing through the linkage groove. The connecting part of the outer clamping plate and the inner tube of the bushing is arc-shaped. During operation, the telescopic sleeve slides to drive the linkage plate to slide through the connecting ring. The linkage plate slides to drive the outer clamping plate to slide along the inner wall of the working sleeve through the linkage groove. Furthermore, the outer clamping plate slides to fit with the outer tube of the bushing, realizing the positioning operation of the outer tube of the bushing and the working sleeve.

[0012] Preferably, a positioning screw is provided at the top of the positioning frame. A connecting guide block is threadedly connected to the outer wall of the positioning screw. A connecting frame is fixedly connected to the outer wall of the connecting guide block. One end of the connecting frame is fixedly connected to a positioning block that fits against the outer wall of the connecting shaft. A linkage rod is rotatably connected to the outer wall of the connecting guide block away from the connecting frame. One end of the linkage rod is rotatably connected to a linkage ring that is rotatably connected to the inner wall of the positioning frame. During operation, the positioning screw rotates to drive the connecting guide block to slide along the inner wall of the positioning frame through the thread. The connecting guide block slides to drive the positioning block to closely fit against the outer wall of the connecting shaft through the connecting frame. At the same time, the connecting guide block slides to drive the linkage ring to rotate through the linkage rod, facilitating the stable centering operation of the connecting shaft.

[0013] Preferably, a closely fitting structure is formed between the positioning block, the connecting guide block and the connecting frame and the connecting shaft. The outer shape of the positioning block is cross-shaped. During operation, the positioning screw rotates to drive the connecting guide block to slide along the inner wall of the positioning frame through the thread. The connecting guide block slides to drive the positioning block to closely fit against the outer wall of the connecting shaft through the connecting frame.

[0014] Preferably, four groups of linkage rods are provided. A rotating structure is formed between the linkage ring and the positioning frame through the linkage rods. Four groups of positioning blocks are provided. The four groups of positioning blocks are connected to the linkage ring through the four groups of linkage rods. During operation, the connecting guide block slides to drive the linkage ring to rotate through the linkage rods. By providing four groups of linkage rods, it is convenient for the four groups of linkage rods to drive the remaining three groups of positioning blocks to closely fit against the outer wall of the connecting shaft through the linkage ring, realizing the stable centering operation of the connecting shaft.

[0015] Preferably, a connecting column fixedly connected to one end of the connecting shaft penetrates through the interior of the monitoring frame. A connecting groove is formed on the outer wall of the connecting column. A working column is movably connected in the connecting groove. A sliding block is fixedly connected to the top end of the working column. A limiting groove is formed at the connecting part between the monitoring frame and the sliding block. A pointer is fixedly connected to the top end of the sliding block. A scale is fixedly connected to the top of the monitoring frame on one side of the pointer. When the automotive bushing works unstably, the worm gear will drive the connecting shaft and the connecting frame to rotate relatively. The rotation of the connecting shaft drives the rotation of the connecting column. The rotation of the connecting column drives the synchronous rotation of the connecting groove. The rotation of the connecting groove drives the sliding block to slide along the outer wall of the limiting groove through the working column. The sliding of the sliding block drives the relative movement of the pointer and the scale, so as to facilitate the detection operation of the working performance of the automotive bushing.

[0016] Preferably, the outer shape of the connecting groove is spiral. The sliding block and the limiting groove form a sliding structure through the connecting groove and the working column. The central axis of the connecting column coincides with the central axis of the connecting shaft. The rotation of the connecting column drives the synchronous rotation of the connecting groove. The rotation of the connecting groove drives the sliding block to slide along the outer wall of the limiting groove through the working column. The sliding of the sliding block drives the relative movement of the pointer and the scale.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By providing the inner support plate, the rotation of the fastening screw drives the telescopic sleeve to slide along the inner wall of the fixed frame through the thread. The sliding of the telescopic sleeve drives the synchronous movement of the four connecting rods, so that the movement of the connecting rods drives the limiting rod on one side of the inner support plate to slide along the inner wall of the fixed frame. Furthermore, the inner support plate slides to fit with the inner tube of the bushing, realizing the fixing operation of the inner tube of the bushing and the fixed frame.

[0018] 2. By providing the outer clamping plate, the sliding of the telescopic sleeve drives the four linkage plates to slide synchronously through the connecting ring. The sliding of the linkage plates drives the outer clamping plate to slide along the inner wall of the working sleeve through the linkage grooves. Furthermore, the outer clamping plate slides to fit with the outer tube of the bushing, realizing the positioning operation of the outer tube of the bushing and the working sleeve.

[0019] 3. By providing the positioning block, the rotation of the positioning screw drives the connecting guide block to slide along the inner wall of the positioning frame through the thread. The sliding of the connecting guide block drives the positioning block to closely fit with the outer wall of the connecting shaft through the connecting frame. At the same time, the sliding of the connecting guide block drives the linkage ring to rotate through the linkage rod. By providing four linkage rods, it is convenient for the four linkage rods to drive the other three positioning blocks to closely fit with the outer wall of the connecting shaft through the linkage ring, realizing the stable centering operation of the connecting shaft.

[0020] 4. By setting up a connecting groove and a working post, when the operation of the automotive bushing is unstable, the worm gear will drive the connecting shaft to rotate relative to the connecting frame. The rotation of the connecting shaft drives the connecting post to rotate, and the rotation of the connecting post drives the connecting groove to rotate synchronously. The rotation of the connecting groove drives the sliding block to slide along the outer wall of the limiting groove through the working post. The sliding of the sliding block drives the pointer to move relative to the scale, so as to facilitate the detection operation of the working performance of the automotive bushing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the bracket connection structure of the present invention; Figure 3 is a schematic cross-sectional view of the working sleeve and the connecting frame of the present invention; Figure 4 is a schematic diagram of the connection structure of the inner bushing tube, the rubber tube and the outer bushing tube of the present invention; Figure 5 is a schematic cross-sectional view of the working sleeve and the fixed frame of the present invention; Figure 6 is Figure 5 the enlarged view at A in Figure 7 is Figure 5 the enlarged view at B in Figure 8 is a schematic diagram of the positioning frame and the monitoring frame of the present invention; Figure 9 is a schematic cross-sectional view of the monitoring frame of the present invention; Figure 10 is a schematic diagram of the linkage rod and the linkage ring of the present invention; Figure 11 is a schematic cross-sectional view of the monitoring frame of the present invention; Figure 12 is a schematic diagram of the connection structure between the worm and the fixed frame of the present invention; Figure 13 is a schematic diagram of a partial structure of the working sleeve of the present invention.

[0022] In the figure: 1. Base; 2. Servo motor; 3. Torque sensor; 4. Worm; 5. Working sleeve; 6. Fixed frame; 601. Fastening screw; 602. Telescopic sleeve; 603. Connecting rod; 604. Inner support plate; 605. Limit rod; 606. Inner bushing tube; 7. Connecting ring; 701. Linking plate; 702. Linking groove; 703. Outer clamping plate; 704. Outer bushing tube; 705. Rubber tube; 8. Connecting frame; 9. Bracket; 10. Connecting shaft; 11. Worm gear; 12. Positioning frame; 1201. Positioning screw; 1202. Connecting guide block; 1203. Connecting frame; 1204. Positioning block; 1205. Linking rod; 1206. Linking ring; 13. Monitoring frame; 1301. Connecting column; 1302. Connecting groove; 1303. Working column; 1304. Sliding block; 1305. Limit groove; 1306. Pointer; 1307. Scale. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] Please refer to Figures 1 to 13 , in the embodiment of the present invention, an automotive bushing dynamic durability test device includes a base 1. A servo motor 2 is fixedly connected to the top end of the base 1. The output end of the servo motor 2 is fixedly connected to a torque sensor 3. The output end of the torque sensor 3 is fixedly connected to a worm 4. The outer wall of the worm 4 is sleeved with a working sleeve 5. One end of the worm 4 is fixedly connected to a fixed frame 6 (as Figure 12 shown). A fastening screw 601 is provided at one end of the fixed frame 6. The outer wall of the fastening screw 601 is threadedly connected to a telescopic sleeve 602 (as Figure 6 shown). The outer wall of the telescopic sleeve 602 is rotatably connected to a connecting rod 603. One end of the connecting rod 603 is rotatably connected to an inner support plate 604. A limit rod 605 that is slidably connected to the inner wall of the fixed frame 6 is fixedly connected to the outer wall of the inner support plate 604. The outer wall of the inner support plate 604 away from the limit rod 605 is attached to an inner bushing tube 606. One end of the telescopic sleeve 602 is rotatably connected to a connecting ring 7. A linking plate 701 that is axially slidably connected to the inner wall of the working sleeve 5 is fixedly connected to the outer wall of the connecting ring 7. A linking groove 702 is provided at one end of the linking plate 701 (as Figure 7As shown in the figure, an outer clamping plate 703 that is radially slidably connected to the inner wall of the working sleeve 5 is movably connected inside the linkage groove 702. A bushing outer tube 704 sleeved on the outer wall of the bushing inner tube 606 is attached to the inner wall of the outer clamping plate 703. A rubber tube 705 is provided at the connection part between the bushing outer tube 704 and the bushing inner tube 606. It should be noted that the automotive bushing is composed of a bushing inner tube 606, a rubber tube 705, and a bushing outer tube 704 (as Figure 4 shown). The bushing inner tube 606 and the bushing outer tube 704 are made of rigid materials.

[0025] Based on the above structure, the telescopic sleeve 602 slides to drive the connecting rod 603 to move, so that the connecting rod 603 moves to drive the limiting rod 605 on one side of the inner support plate 604 to slide along the inner wall of the fixed frame 6. Furthermore, the inner support plate 604 slides to fit with the bushing inner tube 606, realizing the fixing operation of the bushing inner tube 606 and the fixed frame 6 (as Figure 6 shown). At the same time, the telescopic sleeve 602 slides to drive the linkage plate 701 to slide through the connecting ring 7. The linkage plate 701 slides to drive the outer clamping plate 703 to slide along the inner wall of the working sleeve 5 through the linkage groove 702. Furthermore, the outer clamping plate 703 slides to fit with the bushing outer tube 704, realizing the positioning operation of the bushing outer tube 704 and the working sleeve 5, facilitating the quick installation operation of the automotive bushing.

[0026] Furthermore, referring to Figures 1 to 3 , a connecting frame 8 is fixedly connected to the top end of the working sleeve 5. A bracket 9 fixedly connected to the top end of the base 1 is fixedly connected to the outer wall of the connecting frame 8. A connecting shaft 10 is rotatably connected to the inner wall of the connecting frame 8. A worm gear 11 meshing with the outer wall of the worm 4 is rotatably connected to the outer wall of the connecting shaft 10. A positioning frame 12 sleeved on the outer wall of the connecting shaft 10 is fixedly connected to the outer wall of the bracket 9. A monitoring frame 13 is fixedly connected to the outer wall of the positioning frame 12. During operation, the servo motor 2 works to drive the worm 4 to rotate reciprocally. The dynamic durability test of the torque generated by the relative rotation of the bushing inner tube 606 and the bushing outer tube 704 is carried out through the torque sensor 3. At the same time, the worm 4 rotates to drive the worm gear 11 to rotate around the connecting shaft 10 through gear meshing.

[0027] Furthermore, referring to Figures 5 to 7 , both the connecting rod 603 and the linkage plate 701 are provided with four groups. The four groups of connecting rods 603 and the four groups of linkage plates 701 are evenly distributed in a circumferential direction at equal angles with respect to the central axis of the fixed frame 6. During operation, by providing four groups of connecting rods 603 and four groups of linkage plates 701, it is beneficial to realize the stable positioning operation of the bushing inner tube 606 and the bushing outer tube 704.

[0028] Furthermore, referring to Figure 5 and Figure 6, an inner support plate 604 forms an inner support fixing structure with a bushing inner tube 606 through a telescopic sleeve 602 and a connecting rod 603. The connecting part of the inner support plate 604 and the bushing inner tube 606 is arc-shaped. During operation, the telescopic sleeve 602 slides to drive the connecting rod 603 to move, so that the connecting rod 603 moves to drive a limiting rod 605 on one side of the inner support plate 604 to slide along the inner wall of the fixed frame 6. Furthermore, the inner support plate 604 slides to fit with the bushing inner tube 606, realizing the fixing operation of the bushing inner tube 606 and the fixed frame 6.

[0029] Furthermore, referring to Figure 5 and Figure 7 , the outer shape of the linkage groove 702 is inclined. An outer clamping plate 703 forms a clamping structure with a bushing outer tube 704 through the linkage groove 702. The connecting part of the outer clamping plate 703 and the bushing inner tube 606 is arc-shaped. During operation, the telescopic sleeve 602 slides to drive a linkage plate 701 to slide through a connecting ring 7. The linkage plate 701 slides to drive the outer clamping plate 703 to slide along the inner wall of the working sleeve 5 through the linkage groove 702. Furthermore, the outer clamping plate 703 slides to fit with the bushing outer tube 704, realizing the positioning operation of the bushing outer tube 704 and the working sleeve 5.

[0030] Furthermore, referring to Figures 8 to 10 , a positioning screw 1201 is provided at the top of a positioning frame 12. A connecting guide block 1202 is threadedly connected to the outer wall of the positioning screw 1201. A connecting frame 1203 is fixedly connected to the outer wall of the connecting guide block 1202. One end of the connecting frame 1203 is fixedly connected to a positioning block 1204 that fits against the outer wall of a connecting shaft 10. A linkage rod 1205 is rotatably connected to the outer wall of the connecting guide block 1202 away from the connecting frame 1203. One end of the linkage rod 1205 is rotatably connected to a linkage ring 1206 that is rotatably connected to the inner wall of the positioning frame 12. During operation, the positioning screw 1201 rotates to drive the connecting guide block 1202 to slide along the inner wall of the positioning frame 12 through the thread. The connecting guide block 1202 slides to drive the positioning block 1204 to closely fit against the outer wall of the connecting shaft 10 through the connecting frame 1203. At the same time, the connecting guide block 1202 slides to drive the linkage ring 1206 to rotate through the linkage rod 1205, facilitating the stable centering operation of the connecting shaft 10.

[0031] Furthermore, referring to Figure 8 and Figure 9 , the positioning block 1204 forms a closely fitting structure with the connecting shaft 10 through the connecting guide block 1202 and the connecting frame 1203. The outer shape of the positioning block 1204 is cross-shaped. During operation, the positioning screw 1201 rotates to drive the connecting guide block 1202 to slide along the inner wall of the positioning frame 12 through the thread. The connecting guide block 1202 slides to drive the positioning block 1204 to closely fit against the outer wall of the connecting shaft 10 through the connecting frame 1203.

[0032] Furthermore, referring toFigure 9 There are four sets of linkage rods 1205. The linkage ring 1206 forms a rotating structure with the positioning frame 12 through the linkage rods 1205. There are four sets of positioning blocks 1204. The four sets of positioning blocks 1204 are connected to the linkage ring 1206 through the four sets of linkage rods 1205. During operation, the connecting guide block 1202 slides to drive the linkage ring 1206 to rotate through the linkage rods 1205. By setting four sets of linkage rods 1205, it is convenient for the four sets of linkage rods 1205 to drive the other three sets of positioning blocks 1204 to closely fit the outer wall of the connecting shaft 10 through the linkage ring 1206, realizing the stable centering operation of the connecting shaft 10.

[0033] Further, referring to Figure 9 and Figure 10 In, a connecting column 1301 fixedly connected to one end of the connecting shaft 10 penetrates through the inside of the monitoring frame 13. A connecting groove 1302 is formed on the outer wall of the connecting column 1301. A working column 1303 is movably connected in the groove of the connecting groove 1302. The top end of the working column 1303 is fixedly connected to a sliding block 1304. A limiting groove 1305 is formed at the connecting part between the monitoring frame 13 and the sliding block 1304. The top end of the sliding block 1304 is fixedly connected to a pointer 1306. A scale 1307 is fixedly connected to the top end of the monitoring frame 13 on one side of the pointer 1306. When the automotive bushing works unstably, the worm gear 11 will drive the connecting shaft 10 to rotate relative to the connecting frame 8. The rotation of the connecting shaft 10 drives the connecting column 1301 to rotate. The rotation of the connecting column 1301 drives the connecting groove 1302 to rotate synchronously. The rotation of the connecting groove 1302 drives the sliding block 1304 to slide along the outer wall of the limiting groove 1305 through the working column 1303. The sliding of the sliding block 1304 drives the pointer 1306 to move relative to the scale 1307, so as to realize the detection operation of the working performance of the automotive bushing.

[0034] Further, referring to Figure 9 and Figure 10 In, the outer shape of the connecting groove 1302 is spiral. The sliding block 1304 forms a sliding structure with the limiting groove 1305 through the connecting groove 1302 and the working column 1303. The central axis of the connecting column 1301 coincides with the central axis of the connecting shaft 10. The rotation of the connecting column 1301 drives the connecting groove 1302 to rotate synchronously. The rotation of the connecting groove 1302 drives the sliding block 1304 to slide along the outer wall of the limiting groove 1305 through the working column 1303. The sliding of the sliding block 1304 drives the pointer 1306 to move relative to the scale 1307.

[0035] The working principle of the present invention is as follows: When using the dynamic durability test device for automotive bushings, first, the automotive bushing is installed. The staff sleeved the inner tube 606 of the automotive bushing on the outer wall of the fixed frame 6. Then, the staff rotated the fastening screw 601. The rotation of the fastening screw 601 drove the telescopic sleeve 602 to slide along the inner wall of the fixed frame 6 through the thread. The sliding of the telescopic sleeve 602 drove the four groups of connecting rods 603 to move synchronously, so that the movement of the connecting rods 603 drove the limit rods 605 on one side of the inner support plate 604 to slide along the inner wall of the fixed frame 6. Furthermore, the sliding of the inner support plate 604 was in contact with the inner tube 606 of the bushing, realizing the fixing operation of the inner tube 606 of the bushing and the fixed frame 6. At the same time, the sliding of the telescopic sleeve 602 drove the four groups of linkage plates 701 to slide synchronously through the connecting ring 7. The sliding of the linkage plate 701 drove the outer clamping plate 703 to slide along the inner wall of the working sleeve 5 through the linkage groove 702. Furthermore, the sliding of the outer clamping plate 703 was in contact with the outer tube 704 of the bushing, realizing the positioning operation of the outer tube 704 of the bushing and the working sleeve 5, which facilitated the quick installation operation of the automotive bushing.

[0036] Then, the centering operation of the connecting shaft 10 is carried out. In the positioning frame 12, the staff rotated the positioning screw 1201. The rotation of the positioning screw 1201 drove the connecting guide block 1202 to slide along the inner wall of the positioning frame 12 through the thread. The sliding of the connecting guide block 1202 drove the positioning block 1204 to be in close contact with the outer wall of the connecting shaft 10 through the connecting frame 1203. At the same time, the sliding of the connecting guide block 1202 drove the linkage ring 1206 to rotate through the linkage rod 1205. By setting four groups of linkage rods 1205, it was convenient for the four groups of linkage rods 1205 to drive the other three groups of positioning blocks 1204 to be in close contact with the outer wall of the connecting shaft 10 through the linkage ring 1206, realizing the stable centering operation of the connecting shaft 10.

[0037] Then, the servo motor 2 works to drive the inner tube 606 of the bushing to rotate reciprocally through the worm 4. The rotation of the inner tube 606 of the bushing causes relative rotation with the outer tube 704 of the bushing through the rubber tube 705 (at this time, the outer tube 704 of the bushing is fixed inside the working sleeve 5 through the outer clamping plate 703). The dynamic durability test of the torque generated by the relative rotation of the inner tube 606 of the bushing and the outer tube 704 of the bushing is carried out through the torque sensor 3. At the same time, the rotation of the worm 4 drives the worm wheel 11 to rotate around the connecting shaft 10 through gear meshing.

[0038] Finally, a detection operation is performed on the stability of the worm gear 11 during rotation. When the automotive bushing works unstably, it causes the worm gear 11 to rotate unstably. At this time, the four positioning blocks 1204 cannot stably position the connecting shaft 10. The worm gear 11 will drive the connecting shaft 10 to rotate relative to the connecting frame 8. The rotation of the connecting shaft 10 drives the connecting column 1301 to rotate. The rotation of the connecting column 1301 drives the connecting groove 1302 to rotate synchronously. The rotation of the connecting groove 1302 drives the sliding block 1304 to slide along the outer wall of the limiting groove 1305 through the working column 1303. The sliding of the sliding block 1304 drives the pointer 1306 to move relative to the scale 1307, so as to realize the detection operation of the working performance of the automotive bushing.

[0039] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An automotive bushing dynamic durability test device, comprising a base (1), characterized in that: At the top end of the base (1), a servo motor (2) is fixedly connected. At the output end of the servo motor (2), a torque sensor (3) is fixedly connected. At the output end of the torque sensor (3), a worm (4) is fixedly connected. The outer wall of the worm (4) is sleeved with a working sleeve (5). One end of the worm (4) is fixedly connected to a fixed frame (6). At one end of the fixed frame (6), a fastening screw (601) is provided. The outer wall of the fastening screw (601) is threadedly connected to a telescopic sleeve (602). The outer wall of the telescopic sleeve (602) is rotatably connected to a connecting rod (603). One end of the connecting rod (603) is rotatably connected to an inner support plate (604). The outer wall of the inner support plate (604) is fixedly connected to a limiting rod (605) that is slidably connected to the inner wall of the fixed frame (6). The outer wall of the inner support plate (604) away from the limiting rod (605) is attached to a bushing inner tube (606). One end of the telescopic sleeve (602) is rotatably connected to a connecting ring (7). The outer wall of the connecting ring (7) is fixedly connected to a linkage plate (701) that is axially slidably connected to the inner wall of the working sleeve (5). One end of the linkage plate (701) is provided with a linkage groove (702). In the groove of the linkage groove (702), an outer clamping plate (703) that is radially slidably connected to the inner wall of the working sleeve (5) is movably connected. The inner wall of the outer clamping plate (703) is attached to a bushing outer tube (704) that is sleeved on the outer wall of the bushing inner tube (606). A rubber tube (705) is provided at the connection part between the bushing outer tube (704) and the bushing inner tube (606).

2. The dynamic durability test device for an automotive bushing according to claim 1, wherein: At the top end of the working sleeve (5), a connecting frame (8) is fixedly connected. The outer wall of the connecting frame (8) is fixedly connected to a bracket (9) that is fixedly connected to the top end of the base (1). The inner wall of the connecting frame (8) is rotatably connected to a connecting shaft (10). The outer wall of the connecting shaft (10) is rotatably connected to a worm gear (11) that meshes with the outer wall of the worm (4). The outer wall of the bracket (9) is fixedly connected to a positioning frame (12) sleeved on the outer wall of the connecting shaft (10). The outer wall of the positioning frame (12) is fixedly connected to a monitoring frame (13).

3. The dynamic durability test device for an automotive bushing according to claim 1, wherein: Both the connecting rod (603) and the linkage plate (701) are provided with four groups. The four groups of connecting rods (603) and the four groups of linkage plates (701) are evenly distributed in a circumferential direction at equal angles about the central axis of the fixed frame (6).

4. The dynamic durability test device for an automotive bushing according to claim 1, wherein: The inner support plate (604) and the bushing inner tube (606) form an inner support fixing structure through the telescopic sleeve (602) and the connecting rod (603). The connection part between the inner support plate (604) and the bushing inner tube (606) is in an arc shape.

5. The dynamic durability test device for an automotive bushing according to claim 1, characterized in that: The outer shape of the linkage groove (702) is inclined. The outer clamping plate (703) and the bushing outer tube (704) form a clamping structure through the linkage groove (702). The connection part between the outer clamping plate (703) and the bushing inner tube (606) is in an arc shape.

6. The dynamic durability test device for an automotive bushing according to claim 2, wherein: A positioning screw (1201) is provided at the top of the positioning frame (12). A connecting guide block (1202) is threadedly connected to the outer wall of the positioning screw (1201). A connecting frame (1203) is fixedly connected to the outer wall of the connecting guide block (1202). A positioning block (1204) that fits against the outer wall of the connecting shaft (10) is fixedly connected to one end of the connecting frame (1203). A linkage rod (1205) is rotatably connected to the outer wall of the connecting guide block (1202) away from the connecting frame (1203). One end of the linkage rod (1205) is rotatably connected to a linkage ring (1206) that is rotatably connected to the inner wall of the positioning frame (12).

7. The dynamic durability test device for an automotive bushing according to claim 6, wherein: The positioning block (1204) forms a tightly fitting structure with the connecting shaft (10) through the connecting guide block (1202) and the connecting frame (1203). The outer shape of the positioning block (1204) is cross-shaped.

8. An automotive bushing dynamic durability test device according to claim 6, characterized in that: Four groups of the linkage rods (1205) are provided. The linkage ring (1206) forms a rotating structure with the positioning frame (12) through the linkage rods (1205). Four groups of the positioning blocks (1204) are provided. The four groups of the positioning blocks (1204) are connected to the linkage ring (1206) through the four groups of the linkage rods (1205).

9. The dynamic durability test device for an automotive bushing according to claim 2, characterized in that: A connecting column (1301) fixedly connected to one end of the connecting shaft (10) penetrates through the inside of the monitoring frame (13). A connecting groove (1302) is formed on the outer wall of the connecting column (1301). A working column (1303) is movably connected to the inside of the connecting groove (1302). A sliding block (1304) is fixedly connected to the top of the working column (1303). A limiting groove (1305) is formed at the connecting part of the monitoring frame (13) and the sliding block (1304). A pointer (1306) is fixedly connected to the top of the sliding block (1304). A scale (1307) is fixedly connected to the top of the monitoring frame (13) on one side of the pointer (1306).

10. The dynamic durability test device for an automotive bushing according to claim 9, characterized in that: The outer shape of the connecting groove (1302) is spiral. The sliding block (1304) forms a sliding structure with the limiting groove (1305) through the connecting groove (1302) and the working column (1303). The central axis of the connecting column (1301) coincides with the central axis of the connecting shaft (10).

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