Impact strength measuring instrument for pulley body of belt pulley

Abstract

The invention relates to the technical field of impact detection, and discloses a belt pulley body impact strength measuring instrument which structurally comprises a measuring instrument body, an impact device and a fixing device.By arranging the double-station impact device and the fixing device, double-station impact strength measurement can be conducted on two sets of belt pulleys at the same time; the measuring efficiency is improved, the number of the balancing weights can be adjusted, the balancing weights are sequentially increased from small to large, the impact strength of the belt pulley under different weights can be tested, the nuts can be rotated to any position on the threaded rod through threaded fit between the nuts and the threaded rod, and by means of fit between the multiple nuts, the impact strength of the belt pulley under different weights can be measured. The balancing weight can be fixed at different positions of the threaded rod, so that the impact drop point of the balancing weight on the belt pulley is adjusted, and the impact strength of different positions of the belt pulley is tested.

Description

Technical Field

[0001] The invention belongs to the field of impact detection, and in particular relates to an instrument for measuring the impact strength of a pulley body. Background Art

[0002] Pulleys are hub-type parts with relatively large size. The manufacturing process is generally based on casting and forging. The material is generally cast iron. Pulleys are mainly used in long-distance power transmission occasions, such as the output of small diesel engine power, agricultural vehicles, tractors, automobiles, mining machinery, machining equipment, lathes, forging machines, some small horsepower motorcycle power transmission, agricultural machinery power transmission, reducers, speed reducers, generators, etc. After the pulley is produced, it needs to undergo quality inspections, such as density inspection, environmental inspection, and impact strength inspection. The existing impact strength inspection is generally performed manually by operators, which has low inspection efficiency, inaccurate inspection accuracy, and increases the labor intensity of the processing personnel. This application proposes a pulley body impact strength measuring instrument to improve the above-mentioned defects. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a pulley body impact strength measuring instrument capable of improving the impact strength detection function of a pulley.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: A pulley body impact strength measuring instrument, whose structure includes a measuring instrument body, a control box, an impact device and a fixing device. The impact device is installed on the measuring instrument body, and a fixing device is provided directly below the impact device. The control box is installed on the measuring instrument body, and the control box can drive the impact device and the fixing device to operate through electrical connection.

[0005] In a specific feasible implementation scheme, the impact device includes a base plate, a hydraulic cylinder, a mounting plate, a stabilizer bar, a fixed frame and a counterweight block. The base plate is fixed to the column on the measuring instrument body. A hydraulic cylinder is installed on the base plate. The piston end of the hydraulic cylinder passes through the base plate and is connected to the mounting plate. Stabilizer bars are provided on both sides of the mounting plate. A fixed frame is fixedly installed on the bottom of the mounting plate. A number of counterweight blocks are counterweighted on both sides of the fixed frame.

[0006] In a specific possible implementation scheme, the fixing frame includes a spacer block, a threaded rod and a nut. The spacer block is fixed to the bottom of the fixing frame, the threaded rod is installed on the spacer block, and both ends of the threaded rod are screwed with nuts.

[0007] In a specific possible implementation scheme, the counterweight block includes a slot, a through hole and an L-shaped hook. The counterweight block is provided with a slot and a through hole. The diameter of the through hole is larger than the diameter of the threaded rod. An L-shaped hook is fixed to one end of the counterweight block, and the L-shaped hook can be movably engaged with the fixing frame.

[0008] In a specific feasible implementation scheme, the fixing device includes a ball screw group, a guide rail group, a motor, a movable seat, a clamping mechanism, a chain, a gear, a limit plate and a rubber pad. A guide rail group is provided on one side of the ball screw group. The ball screw group and the guide rail group are both slidably fitted with a movable seat. The two groups of movable seats are both equipped with a clamping mechanism. The bottoms of the two groups of clamping mechanisms are linked together by chains. The chains are meshed with gears. The bottoms of the gears are driven by a motor group. A limit plate is provided on the other side of the clamping mechanism. Two groups of rubber pads are fixed on the limit plate. A motor is installed at one end of the ball screw group.

[0009] In a specific possible implementation scheme, the motor group is located on the measuring instrument body, and the bottom is slidably matched with the slide groove inside the body.

[0010] In a specific feasible implementation scheme, the clamping mechanism includes a placement plate, a spiral plate, a turntable, a temperature control device and a shock-absorbing seat. The bottom of the placement plate is rotatably engaged with the spiral plate, the bottom of the spiral plate is fixed with a turntable, the turntable is engaged with a chain, and a shock-absorbing seat and several temperature control devices are installed on the top of the placement plate. The shock-absorbing seat, the placement plate and the spiral plate are on the same center line.

[0011] In a specific feasible implementation scheme, the temperature control device includes a fan, a heating tube, an upper inclined plate, a lower inclined plate and a drive assembly. The blowing side array of the fan has several heating tubes, and several upper inclined plates and lower inclined plates are installed on the other side of the several heating tubes. The several upper inclined plates and lower inclined plates rotate in coordination with the fan and are driven in rotation by the drive assemblies located on both sides of the fan. The upper inclined plates and lower inclined plates are symmetrically arranged.

[0012] In a specific feasible implementation scheme, the driving assembly includes a driving gear, a rack, a limit frame, and a driven gear. One side of the driving gear is engaged with a rack, and both ends of the rack are slidingly fitted with a limit frame. The other side of the rack is engaged with two driven gears, and the two driven gears are respectively connected to the lower inclined plate.

[0013] In a specific possible implementation scheme, the placement plate is provided with an array of movable grooves, and a plurality of the movable grooves are slidably fitted with clamping blocks.

[0014] In a specific possible implementation scheme, a spiral groove is provided on the spiral disk, and the spiral groove is movably engaged with the clamping block.

[0015] In a specific embodiment, a plurality of spring dampers are installed inside the clamping block.

[0016] In a specific possible implementation scheme, the shock-absorbing seat includes a concave-convex ring, an airbag and an arc block. The airbags are installed in the concave grooves of the concave-convex ring, and the arc blocks are fixed in the convex grooves of the concave-convex ring.

[0017] According to the technical solution proposed above, the pulley body impact strength measuring instrument of the present invention has the following beneficial effects: (1) The present invention is provided with a double-station impact device and a fixing device, which can simultaneously perform double-station impact strength measurement on two sets of pulleys, thereby increasing the efficiency of measurement.

[0018] (2) The present invention can test the impact strength of the pulley under different weights by adjusting the number of counterweights, increasing them from small to large. The nut can be rotated to any position on the threaded rod through the threaded fit between the nut and the threaded rod. With the help of the fit between the multiple nuts, the counterweight can be fixed at different positions on the threaded rod, thereby adjusting the impact point of the counterweight on the pulley, and then testing the impact strength of the pulley at different positions.

[0019] (3) The present invention is provided with a temperature control device. By driving the gear to rotate in the forward and reverse directions, the rack can be driven to move up and down. The rack drives the two sets of meshing driven gears to rotate synchronously, thereby controlling the rotation of the two sets of lower inclined plates and upper inclined plates. By adjusting the rotation angle of the upper and lower inclined plates, the exhaust volume of the heat can be controlled, thereby adjusting the heating temperature of the pulley, and simulating the impact strength of the pulley at different temperatures. In addition, the temperature control device is arranged in a ring array, which can evenly heat the pulley.

[0020] (4) The present invention provides a shock-absorbing seat on the clamping mechanism, and the convex groove can be supported by the buffering performance of the arc structure of the arc block on the concave-convex ring. The concave structure of the concave-convex ring and the airbag cooperate to provide buffering support for the bottom of the pulley. When the pulley is impacted, the impact force exerted on the pulley can be buffered and unloaded to avoid damage to the clamping mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings: Figure 1 This is a schematic structural diagram of a pulley body impact strength measuring instrument in an embodiment of the present application; Figure 2 This is a schematic structural diagram of the impact device in an embodiment of the present application; Figure 3 This is a schematic diagram of the installation structure of the fixing frame and the counterweight block in the embodiment of the present application; Figure 4 This is a schematic structural diagram of a fixing device in an embodiment of the present application; Figure 5 This is a schematic structural diagram of the clamping mechanism in an embodiment of the present application; Figure 6 This is a schematic structural diagram of the temperature control device in an embodiment of the present application; Figure 7 This is a schematic diagram of the structure of the driving component in the embodiment of the present application; Figure 8 This is an exploded schematic diagram of the clamping mechanism in an embodiment of the present application; Figure 9 For the embodiment of this application Figure 5 Schematic diagram of the enlarged structure at A in the middle; Figure 10 This is a schematic structural diagram of the shock-absorbing seat in an embodiment of the present application.

[0022] Figure: Measuring instrument body 1, control box 2, impact device 3, fixing device 4, base plate 31, hydraulic cylinder 32, mounting plate 33, stabilizer bar 34, fixing bracket 35, counterweight 36, separator 351, threaded rod 352, nut 353, slot 361, through hole 362, L-shaped hook 363, ball screw assembly 41, guide rail assembly 42, motor 43, movable base 44, clamping mechanism 45, chain 46, gear 47, limit plate -48, rubber pad-49, placement plate-451, spiral plate-452, turntable-453, temperature control device-454, shock absorber seat-455, fan-11, heating tube-12, upper inclined plate-13, lower inclined plate-14, drive assembly-15, drive gear-151, rack-152, limit frame-153, driven gear-154, movable groove-21, clamping block-22, spiral groove-51, spring damper-221, concave-convex ring-71, airbag-72, arc block-73. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0024] Example 1: Please refer to Figure 1-Figure 3 , the specific embodiments of the present invention are as follows: A pulley body impact strength measuring instrument, whose structure includes a measuring instrument body 1, a control box 2, an impact device 3 and a fixing device 4. The impact device 3 is installed on the measuring instrument body 1, and a fixing device 4 is provided directly below the impact device 3 to fix the pulley. The control box 2 is installed on the measuring instrument body 1, and the control box 2 can drive the impact device 3 and the fixing device 4 to operate through electrical connection.

[0025] See also Figure 2 The impact device 3 includes a base plate 31, a hydraulic cylinder 32, a mounting plate 33, a stabilizer bar 34, a fixing frame 35 and a counterweight 36. The base plate 31 is fixed to the column on the measuring instrument body 1. The hydraulic cylinder 32 is installed on the base plate 31. The piston end of the hydraulic cylinder 32 passes through the base plate 31 and is connected to the mounting plate 33. Stabilizer bars 34 are provided on both sides of the mounting plate 33. The two sets of stabilizer bars 34 slide in conjunction with the base plate 31 to increase the stability of the mounting plate 33 when it moves. A fixing frame 35 is fixedly installed at the bottom of the mounting plate 33, and a number of counterweights 36 are counterweighted on both sides of the fixing frame 35.

[0026] See also Figure 2 , a plurality of counterweight blocks 36 can be driven by the hydraulic cylinder 32 to drop downward to impact the pulley on the fixing device 4, and the number of the plurality of counterweight blocks 36 can be adjusted.

[0027] See also Figure 3 The fixing frame 35 includes a partition block 351, a threaded rod 352 and a nut 353. The bottom of the fixing frame 35 is fixed with a partition block 351 that can symmetrically separate several counterweights 36. The threaded rod 352 is installed on the partition block 351, and both ends of the threaded rod 352 are screwed with nuts 353.

[0028] See also Figure 2-Figure 3 The counterweight 36 includes a slot 361, a through hole 362 and an L-shaped hook 363. The counterweight 36 is provided with a slot 361 and a through hole 362. The slot 361 can facilitate the removal of the counterweight 36. The diameter of the through hole 362 is larger than the diameter of the threaded rod 352, so that the counterweight 36 can be placed on the threaded rod 352. An L-shaped hook 363 is fixed to one end of the counterweight 36. The L-shaped hook 363 can be movably engaged with the fixing frame 35, and the counterweight 36 is placed vertically so that the vertical surface of the counterweight 36 faces downward to perform an impact test on the pulley.

[0029] See also Figure 3By placing the counterweight 36 on the threaded rod 352 of the fixing frame 35 and adjusting the number of the counterweights 36, increasing them from small to large, the impact strength of the pulley under different weights can be tested. The threaded fit between the nut 353 and the threaded rod 352 allows the nut 353 to be rotated to any position on the threaded rod 352. With the fit between multiple nuts 353, the counterweight 36 can be fixed at different positions of the threaded rod 352, thereby adjusting the impact point of the counterweight 36 on the pulley, and then testing the impact strength of the pulley at different positions.

[0030] Example 2: Please refer to Figures 4-10 , the specific embodiments of the present invention are as follows: See also Figure 4 The fixing device 4 includes a ball screw group 41, a guide rail group 42, a motor 43, a movable seat 44, a clamping mechanism 45, a chain 46, a gear 47, a limit plate 48 and a rubber pad 49. A guide rail group 42 is provided on one side of the ball screw group 41. The ball screw group 41 and the guide rail group 42 are both slidably matched with a movable seat 44. Both sets of movable seats 44 are equipped with a clamping mechanism 45 that can fix the pulley. The bottom of the two sets of clamping mechanisms 45 are linked by a chain 46. A gear 47 is meshed on the chain 46. The bottom of the gear 47 is driven by the motor group. A limit plate 48 is provided on the other side of the clamping mechanism 45. Two sets of rubber pads 49 are fixed on the limit plate 48. The rubber pads 49 can contact the clamping mechanism 45. When the clamping mechanism 45 contacts the rubber pads 49, it stops moving. A motor 43 is installed at one end of the ball screw group 41, and the motor 43 drives the ball screw to rotate.

[0031] See also Figure 4 The motor group is located on the measuring instrument body 1, and the bottom slides in conjunction with the slide groove inside the body. It can move synchronously on the measuring instrument body 1 with the movement of the clamping mechanism 45 and is driven by the control box 2.

[0032] See also Figure 5-Figure 8 The clamping mechanism 45 includes a placement plate 451, a spiral plate 452, a turntable 453, a temperature control device 454 and a shock-absorbing seat 455. The bottom of the placement plate 451 is rotated with the spiral plate 452, and the turntable 453 is fixed to the bottom of the spiral plate 452. The turntable 453 cooperates with the chain 46 to drive the turntable 453 to rotate. The top of the placement plate 451 is installed with a shock-absorbing seat 455 and several temperature control devices 454. The shock-absorbing seat 455 is on the same center line as the placement plate 451 and the spiral plate 452.

[0033] See also Figure 6The temperature control device 454 includes a fan 11, a heating tube 12, an upper inclined plate 13, a lower inclined plate 14 and a driving assembly 15. The blowing side array of the fan 11 is provided with a plurality of heating tubes 12, and the other side of the plurality of heating tubes 12 is provided with a plurality of upper inclined plates 13 and lower inclined plates 14. The plurality of upper inclined plates 13 and lower inclined plates 14 rotate in coordination with the fan 11 and are rotationally driven by the driving assembly 15 located on both sides of the fan 11. The upper inclined plates 13 and the lower inclined plates 14 are symmetrically arranged.

[0034] See also Figure 6-Figure 7 The driving assembly 15 includes a driving gear 151, a rack 152, a limit frame 153, and a driven gear 154. The driving gear 151 is located on the fan 11 and is driven by an electrical connection. One side of the driving gear 151 is engaged with a rack 152, and both ends of the rack 152 are slidably matched with the limit frame 153. The other side of the rack 152 is engaged with two driven gears 154, and the two driven gears 154 are respectively connected to the lower inclined plate 14.

[0035] See also Figure 7 By driving the gear 151 to rotate in the forward and reverse directions, the rack 152 meshing with it can be driven to move up and down. As the rack 152 moves, the two sets of driven gears 154 meshing with it on the other side can be driven to rotate synchronously, thereby controlling the rotation of the two sets of lower inclined plates 14 and adjusting the size of the air outlet of the lower inclined plate 14. The driving of several upper inclined plates 13 is similar. By adjusting the rotation angle of the upper inclined plate 13 and the lower inclined plate 14, the exhaust volume of the hot air can be controlled, thereby adjusting the heating temperature of the pulley, and can simulate the impact strength of the pulley at different temperatures. The temperature control device 454 is arranged in an annular array, which can evenly heat the pulley.

[0036] See also Figure 8 The placement plate 451 is provided with an array of movable grooves 21, and a plurality of movable grooves 21 are slidably fitted with clamping blocks 22, which can fix the pulley.

[0037] See also Figure 8 A spiral groove 51 is provided on the spiral disk 452 , and the spiral groove 51 is movably engaged with the clamping block 22 , and the rotation of the spiral disk 452 can drive the clamping blocks 22 to slide on the movable groove 21 to perform a clamping movement.

[0038] See also Figure 9 A plurality of spring dampers 221 are installed inside the clamping block 22 , and the plurality of spring dampers 221 can play a role of buffering and shock absorbing for the clamping block 22 .

[0039] See also Figure 10The shock-absorbing seat 455 includes a concave-convex ring 71, an airbag 72 and an arc block 73. Airbags 72 are installed in several concave grooves of the concave-convex ring 71, and arc blocks 73 are fixed in several convex grooves of the concave-convex ring 71. The arc blocks 73 can support the convex grooves with the help of the buffering performance of the arc structure. With the help of the concave structure of the concave-convex ring 71 and the airbag 72, the bottom of the pulley can be buffered and supported. When the pulley is impacted, the impact force exerted on the pulley can be buffered and unloaded to avoid damage to the clamping mechanism 45.

[0040] Based on the above embodiment, the specific working principle is as follows: The motor 43 drives the ball screw group 41 to move, driving the clamping mechanism 45 located on the two sets of moving seats 44 to move outward, making it convenient for the processing personnel to place the pulley on the shock-absorbing seat 455 of the clamping mechanism 45, and then the motor group on the measuring instrument body 1 drives the gear 47 connected thereto to rotate. With the meshing between the gear 47 and the chain 46, the movement of the chain 46 can drive the turntable 453 and the spiral disk 452 on the two sets of clamping mechanisms 45 to rotate. When the spiral disk 452 rotates, it drives a number of clamping blocks 22 to slide on the moving groove 21 through the spiral groove 51. With the help of the clamping blocks 22, the pulley can be clamped. After clamping, the ball screw group 41 is driven to operate to drive the two sets of moving seats 44 to move, and the two sets of clamping mechanisms 45 are transported to the bottom of the impact device 3 and then stop. By driving the hydraulic cylinder 32 to drive the counterweight 36 at the bottom to drop downward to impact the pulley, the impact strength of the pulley can be tested. By adjusting the number of counterweights 36, increasing them from small to large, the impact strength of the pulley under different weights can be tested. Moreover, through the threaded cooperation between the nut 353 and the threaded rod 352, and through the cooperation between multiple nuts 353, the counterweight 36 can be fixed at different positions on the threaded rod 352, thereby adjusting the center of gravity of the counterweight 36 and the impact point on the pulley, and then testing the impact strength of different positions of the pulley; When the pulley is undergoing impact measurement, the fan 11 and the heating tube 12 on the temperature control device 454 are driven to operate. The wind blown by the fan 11 becomes hot wind after passing through the heating tube 12 and is blown toward the pulley, thereby measuring the impact strength of the pulley in a high-temperature environment. By driving the gear 151 in both positive and negative directions, the rack 152 meshing with it can be driven to move up and down, driving the two sets of driven gears 154 meshing on the other side to rotate synchronously, thereby controlling the rotation of the two sets of lower inclined plates 14 and upper inclined plates 13. By adjusting the rotation angle of the upper inclined plates 13 and the lower inclined plates 14, the exhaust volume of the heat can be controlled, thereby adjusting the heating temperature of the pulley, and simulating the impact strength of the pulley under different temperatures. The concave structure of the concave-convex ring 71 on the clamping mechanism 45 cooperates with the airbag 72 to provide buffering support for the bottom of the pulley. When the pulley is impacted, the impact force exerted on the pulley can be buffered and unloaded to avoid damage to the clamping mechanism 45.

[0041] In the description of the present invention, it should be understood that the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0042] The above is only a specific implementation method of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed in this application, which should be covered by the protection scope of the present application.

Claims

1. A pulley body impact strength measuring instrument, comprising a measuring instrument body (1), an impact device (3) provided on the measuring instrument body (1), a fixing device (4) located directly below the impact device (3), and a control box (2) installed on the measuring instrument body (1); characterized in that: The impact device (3) comprises a base plate (31), a hydraulic cylinder (32) mounted on the base plate (31), a mounting plate (33) disposed at the piston end of the hydraulic cylinder (32), stabilizing rods (34) located on both sides of the mounting plate (33), a fixing frame (35) mounted on the bottom of the mounting plate (33), and a plurality of counterweights (36) disposed on both sides of the fixing frame (35); The fixing device (4) includes a ball screw assembly (41), a guide rail assembly (42) provided on one side of the ball screw assembly (41), a movable seat (44) for slidingly cooperating with the ball screw assembly (41) and the guide rail assembly (42), a clamping mechanism (45) located on the two sets of the movable seats (44), a chain (46) located at the bottom of the two sets of the clamping mechanism (45), a gear (47) for meshing with the chain (46), a motor assembly located at the bottom of the gear (47), a limit plate (48) provided on the other side of the clamping mechanism (45), and two sets of rubber pads (49) installed on the limit plate (48); The clamping mechanism (45) includes a placement plate (451), a spiral plate (452) rotatably engaged at the bottom of the placement plate (451), a turntable (453) fixed at the bottom of the spiral plate (452), a shock-absorbing seat (455) mounted on the top of the placement plate (451), and a plurality of temperature control devices (454), wherein the shock-absorbing seat (455), the placement plate (451), and the spiral plate (452) are located on the same center line; The temperature control device (454) includes a fan (11), a plurality of heating tubes (12) located on the blowing side of the fan (11), and a plurality of upper inclined plates (13) and lower inclined plates (14) located on the other side of the plurality of heating tubes (12). The plurality of upper inclined plates (13) and lower inclined plates (14) are rotatably matched with the fan (11) and are rotationally driven by driving components (15) located on both sides of the fan (11). The upper inclined plates (13) and lower inclined plates (14) are symmetrically arranged. The shock-absorbing seat (455) comprises a concave-convex ring (71), an air bag (72) disposed in a plurality of concave grooves of the concave-convex ring (71), and an arc-shaped block (73) located in a plurality of convex grooves of the concave-convex ring (71).

2. The pulley body impact strength measuring instrument according to claim 1, characterized in that: The fixing frame (35) comprises a partition block (351), a threaded rod (352) located on the partition block (351), and nuts (353) for spirally engaging with both ends of the threaded rod (352).

3. The pulley body impact strength measuring instrument according to claim 1, characterized in that: The counterweight block (36) comprises a slot (361), a through hole (362) and an L-shaped hook (363). The counterweight block (36) is provided with a slot (361) and a through hole (362). The diameter of the through hole (362) is larger than the diameter of the threaded rod (352). An L-shaped hook (363) is fixed to one end of the counterweight block (36).

4. The pulley body impact strength measuring instrument according to claim 1, characterized in that: The motor group is located on the measuring instrument body (1), and the bottom thereof is in sliding engagement with a slide groove inside the body, and can move synchronously on the measuring instrument body (1) as the clamping mechanism (45) moves, and is driven by the control box (2).

5. The pulley body impact strength measuring instrument according to claim 1, characterized in that: The driving assembly (15) comprises a driving gear (151), a rack (152) provided on one side of the driving gear (151), a limit frame (153) slidably fitted at both ends of the rack (152), and two driven gears (154) provided on the other side of the rack (152).

6. The pulley body impact strength measuring instrument according to claim 1, characterized in that: The placement plate (451) is provided with an array of movable grooves (21), and a plurality of the movable grooves (21) are slidably fitted with clamping blocks (22).

7. The pulley body impact strength measuring instrument according to claim 1, characterized in that: A spiral groove (51) is provided on the spiral disk (452), and the spiral groove (51) is movably engaged with the clamping block (22).

8. The pulley body impact strength measuring instrument according to claim 6, characterized in that: A plurality of spring dampers (221) are installed inside the clamping block (22), and the plurality of spring dampers (221) can play a role in buffering and shock absorbing the clamping block (22).

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