Broken belt buffering and clamping mechanism for stretcher

Abstract

The invention discloses a broken belt buffering and clamping mechanism for a stretcher, and belongs to the technical field of stretchers. The device mainly comprises a workbench; the clamping device comprises a lower clamping assembly and an upper clamping assembly, the upper clamping assembly comprises a supporting frame, two moving modules are arranged in the supporting frame, and a cross beam is arranged at the output ends of the moving modules; a limiting ring is mounted in the chassis; knobs are mounted on the screws in a threaded manner; one end of each sliding rod is provided with an end head; two groups of damping springs; the connecting cylinder is mounted at the bottom of the movable disc, and an upper clamping part is arranged on the connecting cylinder. According to the broken belt buffering and clamping mechanism for the stretcher, through the arrangement of the upper clamping assembly and the lower clamping assembly, the whole to-be-tested object can be buffered after the to-be-tested object is broken, the situation that connecting parts between the upper clamping assembly and the stretcher and between the lower clamping assembly and the stretcher are affected is avoided, and the effect of buffering the whole clamp during belt breaking is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of stretching machines, and in particular to a broken belt buffer clamping mechanism for a stretching machine. Background Art

[0002] A tensile machine is a device used to perform tensile tests on materials. Its main purpose is to determine the mechanical properties of materials during the tensile process, such as yield strength, tensile strength, elongation, etc. It applies axial tension to cause the material to be stretched and deformed until it breaks, while recording the force and deformation data.

[0003] During the tensile test, when the material breaks, a large impact force will be generated instantly, and this impact force will directly act on the fixture. In order to ensure the service life of the fixture, it is necessary to buffer it when the belt breaks;

[0004] For example, the patent with publication number CN118875116A specifically discloses a broken belt buffer clamping mechanism suitable for a large stretching machine. The mechanism is provided with an upper pad, a lower pad, an upper connecting assembly, a lower connecting assembly and a plurality of elastic members (a first upper elastic member, a second upper elastic member, a first lower elastic member, and a second lower elastic member). When a plate is broken, the impact force generated is effectively absorbed and dispersed by these elastic members, thereby reducing the direct impact on the top, bottom and side walls of the clamping cavity.

[0005] However, although the buffer mechanism of the above patent can buffer the component forces generated when the belt breaks in all directions and protect the top, bottom and side walls of the clamping cavity, the impact force generated by the instantaneous belt breakage may still be transmitted to other parts of the stretching machine through the clamp seat, thereby affecting the entire clamp seat and the structural parts of the stretching machine connected thereto;

[0006] Therefore, it is necessary to provide a broken belt buffer clamping mechanism for a stretching machine to solve the above problems.

[0007] It should be noted that the above information disclosed in this background technology section is only for understanding the background technology of the present application concept, and therefore, it may contain information that does not constitute the prior art. Summary of the invention

[0008] Based on the above problems existing in the prior art, the problem to be solved by the present application is to provide a broken belt buffer clamping mechanism for a stretching machine, so as to achieve the effect of buffering the entire clamp when the belt breaks.

[0009] The technical solution adopted by the present application to solve its technical problems is: a broken belt buffer clamping mechanism for a stretching machine, comprising a workbench; a lower clamping assembly, which is arranged on the workbench; an upper clamping assembly, which is arranged on the workbench, and the upper clamping assembly comprises: a support frame, which is installed on the workbench, and two groups of moving modules are arranged inside the support frame, and a crossbeam is arranged on the output end of the moving module; a chassis, which is installed at the bottom of the crossbeam, and a limit ring is installed inside the chassis; two groups of screw rods, which are installed inside the chassis, and knobs are threadedly installed on the screw rods; two groups of sliding rods, which are slidably arranged inside the screw rods, and one end of the sliding rods is installed with an end head; two groups of shock-absorbing springs, which are arranged between the knob and the end head, and the shock-absorbing spring is sleeved on the outside of the screw rod; a moving disk, which is installed at the bottom of the two groups of end heads, and the moving disk is slidably arranged inside the chassis, and the moving disk is located above the limit ring; a connecting tube, which is installed at the bottom of the moving disk, and an upper clamping part is arranged on the connecting tube.

[0010] Furthermore, the lower clamping assembly includes two groups of bases installed on the workbench, at least two groups of connecting rods are installed on the bases, and a top plate is installed on the top of the connecting rods.

[0011] Furthermore, a buffer seat is installed on the base, a buffer shell is installed on the buffer seat, a straight rod is arranged through the interior of the buffer shell, a pressure plate is arranged at the bottom of the straight rod, and a buffer spring is arranged between the bottom of the pressure plate and the buffer seat.

[0012] Furthermore, the straight rod passes through the top plate and exposes the top of the top plate. A mounting plate is installed on the top of the straight rod, and two sets of guide rods are installed on the bottom of the mounting plate. The guide rod passes through the top plate, and threaded parts are provided on the guide rod and the straight rod, and nuts are threadedly installed on the threaded parts.

[0013] Furthermore, a lower clamping portion is arranged on the mounting plate, and the lower clamping portion comprises a clamping block mounted on the two groups of mounting plates, a groove is provided on the clamping block, and the groove has two groups of inclined surfaces arranged opposite to each other.

[0014] Furthermore, a cylinder is installed inside the groove, a push rod is installed at the output end of the cylinder, a disc is installed on the top of the push rod, two groups of inclined sliding blocks are slidably arranged on the top of the disc, connecting blocks are installed at the bottom of the two groups of inclined sliding blocks, a cavity is opened on the connecting block, the disc is located in the two groups of cavities, and the bottom of the disc is against the bottom wall of the cavity.

[0015] Furthermore, moving grooves are provided on the inclined ends of the two groups of inclined sliding blocks.

[0016] Furthermore, a knocking assembly is provided on both the upper clamping assembly and the lower clamping assembly. The knocking assembly includes two sets of slide grooves opened inside the clamping block. A rotating plate is rotatably installed at the center of the slide groove. A connecting rod is hinged at the bottom of the rotating plate. A through groove is opened inside the clamping block, and the through groove is connected to the slide groove.

[0017] Furthermore, a circular groove is provided inside the clamping block, the circular groove is connected to the through groove, a cylinder is slidably provided inside the circular groove, the cylinder is connected to the end of the connecting rod away from the rotating plate, and a compression spring is provided between one side of the cylinder and the circular groove.

[0018] Furthermore, a round rod is hinged on the top of the rotating plate, a knocking portion is arranged at one end of the round rod away from the rotating plate, a fixing block is installed on the top of the clamping block, and the round rod passes through the fixing block.

[0019] The beneficial effect of the present application is that the present application provides a broken belt buffer clamping mechanism for a stretching machine, which can buffer the entire object to be tested after it breaks through the arrangement of an upper clamping assembly and a lower clamping assembly, thereby avoiding the influence of the connecting parts between the upper clamping assembly and the lower clamping assembly and the stretching machine, thereby achieving the effect of buffering the entire clamp when the belt breaks.

[0020] In addition to the above-described purposes, features and advantages, the present application also has other purposes, features and advantages. The present application will be further described in detail with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings in the specification, which constitute a part of the present application, are used to provide further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0022] In the attached picture:

[0023] Figure 1 It is an overall schematic diagram of a broken belt buffer clamping mechanism used in a stretching machine in the present application;

[0024] Figure 2 for Figure 1 A schematic cross-sectional view of the entire middle part;

[0025] Figure 3 for Figure 1 A schematic cross-sectional view of the entire middle part;

[0026] Figure 4 for Figure 3 The enlarged schematic diagram of point A in the middle;

[0027] Figure 5 for Figure 4 The enlarged schematic diagram of point B in the middle;

[0028] Figure 6 for Figure 1 A schematic cross-sectional view of the entire middle part;

[0029] Figure 7 for Figure 6 The enlarged schematic diagram of the center C;

[0030] Among them, the reference numerals in the figure are:

[0031] 1. Workbench;

[0032] 2. Upper clamping assembly; 21. Support frame; 22. Crossbeam;

[0033] 3. chassis; 31. connecting tube; 32. upper clamping part; 33. screw rod; 34. knob; 35. shock absorbing spring; 36. slide rod; 37. end; 38. moving plate; 39. limiting ring;

[0034] 4. Lower clamping assembly; 41. Base; 401. Buffer seat; 402. Connecting rod; 403. Top plate; 404. Mounting plate; 405. Guide rod; 406. Nut; 407. Straight rod; 408. Buffer shell; 409. Buffer spring; 42. Lower clamping part; 43. Clamping block; 431. Inclined surface; 432. Groove; 44. Oblique slider; 45. Disc; 46. Connecting block; 47. Push rod; 48. Cylinder;

[0035] 5. knocking assembly; 51. connecting rod; 52. slide groove; 53. rotating plate; 54. round rod; 541. knocking part; 55. fixed block; 56. compression spring; 57. cylinder; 58. moving groove. DETAILED DESCRIPTION

[0036] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0037] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0038] Embodiment 1:

[0039] like Figure 1 As shown, the present application provides a broken belt buffer clamping mechanism for a stretching machine, comprising a workbench 1, and a lower clamping assembly 4 is arranged on the workbench 1, and the lower clamping assembly 4 is used to clamp the object to be tested, specifically:

[0040] like Figure 1-Figure 2As shown, the lower clamping assembly 4 includes two groups of bases 41 fixedly mounted on the workbench 1, and multiple groups of connecting rods 402 are fixedly mounted on the bases 41, and a top plate 403 is fixedly mounted on the top of the connecting rods 402, and a buffer seat 401 is fixedly mounted on the base 41, and a buffer shell 408 is mounted on the buffer seat 401, and a straight rod 407 is arranged inside the buffer shell 408 to facilitate the straight rod 407 to move up and down inside the buffer shell 408;

[0041] It should be noted that a pressure plate (not shown in the figure) is provided at the bottom of the straight rod 407, and a buffer spring 409 is provided between the bottom of the pressure plate and the buffer seat 401. At the same time, the straight rod 407 passes through the top plate 403 and exposes the top of the top plate 403, and a mounting plate 404 is fixedly installed on the top of the straight rod 407, so that when the mounting plate 404 is subjected to external impact, the buffer spring 409 can be squeezed by the straight rod 407 and the impact force can be reduced under the action of its rebound force;

[0042] like Figure 3-Figure 4 As shown, a lower clamping portion 42 is provided on the mounting plate 404, and the lower clamping portion 42 is used to clamp the object to be tested. It should be noted that the test object is a pipe wall cut from a steel pipe, which is used to test the tensile properties of the steel pipe. For the convenience of description, it is defined as a steel pipe wall material;

[0043] The lower clamping portion 42 includes a clamping block 43 fixedly mounted on two sets of mounting plates 404, and a groove 432 is formed on the clamping block 43. The groove 432 has two sets of inclined surfaces 431 arranged opposite to each other, and the distance between the two sets of inclined surfaces 431 gradually increases along the direction gradually approaching the connecting block 46.

[0044] Meanwhile, a cylinder 48 is installed inside the groove 432, a push rod 47 is fixedly installed on the output end of the cylinder 48, and a disc 45 is fixedly installed on the top of the push rod 47, and two groups of inclined sliding blocks 44 are slidably arranged on the top of the disc 45. The two groups of inclined sliding blocks 44 can move closer to or farther from each other, and clamp the metal sheet when they move closer to each other;

[0045] A connecting block 46 is fixedly mounted at the bottom of the two groups of inclined sliding blocks 44. A cavity (not shown in the figure) is formed on the connecting block 46. Meanwhile, the disc 45 is located in the two groups of cavities, and the bottom of the disc 45 abuts against the bottom wall of the cavity, so that the disc 45 moves downward under the drive of the cylinder 48, thereby driving the connecting block 46 to move, and further driving the two groups of inclined sliding blocks 44 to move downward synchronously.

[0046] It should be noted that one side of the two groups of inclined sliders 44 has an inclined end adapted to the two groups of inclined surfaces 431, and the other side of the two groups of inclined sliders 44 has a clamping surface suitable for clamping the steel pipe wall material, and the inclined ends of the two groups of inclined sliders 44 are in contact with the inclined surfaces 431, and then when it is necessary to clamp the steel pipe wall material, the cylinder 48 moves the disc 45 upward through the push rod 47, thereby driving the two groups of inclined sliders 44 to move upward, and under the cooperation of the inclined surfaces 431 and the inclined ends of the inclined sliders 44, the two groups of inclined sliders 44 are driven to approach each other on the disc 45, and then the steel pipe wall material is clamped through the two groups of clamping surfaces;

[0047] At the same time, two sets of guide rods 405 are fixedly installed at the bottom of the mounting plate 404. The guide rods 405 penetrate the top plate 403, so that when the mounting plate 404 is moved downward by an external force, its movement is more stable. At the same time, threaded parts (not shown in the figure) are provided on the guide rods 405 and the straight rods 407, and nuts 406 are threadedly installed on the threaded parts. The nuts 406 are located at the bottom of the top plate 403 and leave a certain gap with the bottom of the top plate 403, so that when the lower clamping assembly 4 is pulled upward by an external force, its moving distance is limited;

[0048] At the same time, an upper clamping assembly 2 is arranged on the workbench 1, and the upper clamping assembly 2 is used to clamp and stretch the steel pipe wall material;

[0049] like Figure 1 As shown, the upper clamping assembly 2 includes a support frame 21 fixedly mounted on the workbench 1, and two groups of moving modules (not shown in the figure) are arranged inside the support frame 21. The moving modules have high-precision ball screws and linear guides as transmission mechanisms, and use servo motors as power sources. The above moving modules are prior art, and the details can be found in relevant materials, which will not be described in detail here;

[0050] At the same time, a crossbeam 22 is commonly provided at the output ends of the two groups of mobile modules, and a chassis 3 is fixedly installed at the bottom of the crossbeam 22, so that under the drive of the mobile module, the crossbeam 22 can drive the chassis 3 to move up and down.

[0051] like Figure 6-Figure 7 As shown, a moving plate 38 is slidably arranged inside the chassis 3, a connecting cylinder 31 is fixedly installed at the bottom of the moving plate 38, and an upper clamping portion 32 is arranged at one end of the connecting cylinder 31 away from the moving plate 38, and a limiting ring 39 is fixedly installed inside the chassis 3, and the limiting ring 39 is located at the bottom of the moving plate 38, so that when the chassis 3 moves, the moving plate 38 is driven to move through the limiting block, thereby driving the connecting cylinder 31 to move, and then driving the upper clamping portion 32 to move;

[0052] It should be noted that the upper clamping part 32 has the same structure and principle as the lower clamping part 42, and the upper clamping part 32 is located above the lower clamping part 42 to facilitate clamping the steel pipe wall material, and under the drive of the moving module, the upper clamping part 32 moves upward to stretch the steel pipe wall material until it breaks;

[0053] Meanwhile, two sets of screw rods 33 are fixedly installed inside the chassis 3, a slide rod 36 is provided inside the screw rod 33, an end 37 is fixedly installed on one end of the slide rod 36 away from the screw rod 33, a knob 34 is threadedly provided on the screw rod 33, and a shock absorbing spring 35 is provided between the knob 34 and the end 37, the shock absorbing spring 35 is sleeved outside the screw rod 33, and the end 37 is fixedly connected to the top of the moving plate 38;

[0054] When the steel pipe wall material breaks, an impact force is generated. At this time, the impact force is transmitted to the connecting tube 31 through the upper clamping part 32, and then transmitted to the movable plate 38, causing it to move upward, thereby driving the sliding rod 36 to move toward the inside of the screw rod 33 through the end 37, and squeezing the shock-absorbing spring 35. Under the action of the rebound force of the shock-absorbing spring 35, the movable plate 38 can be reset, so that the impact force generated when the object breaks is reduced, and the position of the knob 34 on the screw rod 33 can be adjusted as needed to adjust the compression degree of the shock-absorbing spring 35, thereby adjusting the buffering force of the shock-absorbing spring 35;

[0055] In summary, during the test, the steel pipe wall material is placed between the upper clamping portion 32 and the lower clamping portion 42, and the extension of the cylinder 48 is started to drive the inclined slide 44 to clamp the metal plate;

[0056] The moving module is started to drive the cross beam 22 to move upward, thereby driving the moving plate 38 and the connecting tube 31 to move upward through the chassis 3 and the limiting ring 39. At this time, the moving plate 38 drives the end head 37 to move, thereby driving the upper clamping part 32 to move upward, and at the same time driving the shock absorbing spring 35 to be slightly stretched. At this time, the steel pipe wall material drives the lower clamping part 42 to move upward, thereby driving the mounting plate 404 to move upward, and then driving the nut 406 to move upward. When the nut 406 abuts against the bottom of the bottom plate, at this time, under the action of the nut 406, the movement range of the lower clamping part 42 is limited, and the buffer spring 409 is slightly stretched. At this time, the position of the lower clamping part 42 is fixed, so that as the cross beam 22 continues to move upward, the steel pipe wall material can be subjected to a tensile test;

[0057] When the object breaks, the shock absorbing spring 35 is reset, and the impact force generated by the object breaking is transmitted to the connecting tube 31 through the upper clamping part 32, and then transmitted to the movable plate 38 and causes it to move upward, thereby driving the sliding rod 36 to move inside the screw rod 33 through the end 37 and squeezing the shock absorbing spring 35. At the same time, the movable plate 38 can be reset under the action of the rebound force of the shock absorbing spring 35, thereby resetting the upper clamping part 32 to buffer the impact force generated when the object breaks;

[0058] At the same time, the buffer spring 409 is reset, and the impact force received by the lower clamping part 42 is transmitted to the mounting plate 404 through the lower clamping part 42, causing it to move downward, thereby moving toward the inside of the buffer shell 408 through the straight rod 407 and squeezing the buffer spring 409. At the same time, the mounting plate 404 can be reset under the action of the rebound force of the buffer spring 409, thereby resetting the lower clamping part 42 to buffer the impact force generated when the object breaks.

[0059] Embodiment 2:

[0060] In the above process, since the upper clamping assembly 2 and the lower clamping assembly 4 clamp the steel pipe wall material, and in the tensile test, the steel pipe wall material needs to be continuously clamped, thereby forcing the steel pipe wall material to undergo plastic deformation. This deformation may be transmitted to a certain extent to the clamping surface of the steel pipe wall material and the inclined slider 44 used to clamp the steel pipe wall material in the upper clamping assembly 2 and the lower clamping assembly 4, resulting in a closer contact between the two, so that when the upper clamping assembly 2 and the lower clamping assembly 4 are loosened, the steel pipe wall material may be pressed on the clamping surface of the steel pipe wall material and one set of inclined sliders 44, requiring manual knocking or shaking to remove it;

[0061] In order to solve this problem, a knocking assembly 5 is provided on both the upper clamping assembly 2 and the lower clamping assembly 4. Since the two sets of knocking assemblies 5 have the same structure and principle, for the convenience of description, the knocking assembly 5 on the clamping assembly 4 is used as an example below;

[0062] like Figure 4-Figure 5 As shown, the knocking assembly 5 includes two groups of slide grooves 52 opened inside the clamping block 43, and a rotating plate 53 is rotatably installed at the center of the slide groove 52. The bottom of the rotating plate 53 is hinged with a connecting rod 51. At the same time, a through groove (not marked in the figure) adapted to the connecting rod 51 is opened inside the clamping block 43, so that the connecting rod 51 can slide in the through groove, and the through groove is connected with the slide groove 52;

[0063] At the same time, a circular groove (not shown in the figure) is provided inside the clamping block 43, the circular groove is connected to the through groove, and a cylinder 57 is slidably provided inside the circular groove, the cylinder 57 is connected to the end of the connecting rod 51 away from the rotating plate 53, and a compression spring 56 is provided between one side of the cylinder 57 and the circular groove, so that under the action of an external force, the cylinder 57 moves toward the inside of the circular groove and compresses the compression spring 56, thereby driving the rotating plate 53 to rotate through the connecting rod 51, and when the external force disappears, the cylinder 57 is reset under the action of the spring, thereby driving the rotating plate 53 to reset;

[0064] At the same time, a movable groove 58 adapted to the inclined end of the two sets of inclined sliding blocks 44 is provided in the inclined direction, and a guide block (not shown in the figure) is fixedly installed on the inclined surface 431. The guide block is located inside the movable groove 58 to guide the inclined sliding block 44 when it moves.

[0065] It should be noted that the bottom of the moving groove 58 is vertically arranged (not shown in the figure), so that when the inclined sliding block 44 gradually moves upward and approaches each other, the distance between the bottom of the moving groove 58 and the connecting rod 51 gradually increases, and at the same time, a round rod 54 is hinged on the top of the rotating plate 53, and the side of the round rod 54 away from the rotating plate 53 has a knocking portion 541, and a fixed block 55 is fixedly installed on the top of the clamping block 43, and the round rod 54 penetrates the fixed block 55, so that when the rotating plate 53 rotates, the round rod 54 is driven to slide inside the fixed block 55;

[0066] It should be noted that, in the initial state, part of the cylinder 57 is located inside the vertical part and fits with its inner wall, at which time the compression spring 56 is compressed, and the knocking part 541 exposes a part of the clamping surface of the inclined slider 44;

[0067] In summary, when the lower clamping assembly 4 clamps the steel pipe wall material, it is placed between the clamping surfaces of the two groups of inclined sliders 44, and the cylinder 48 is started to drive the inclined slider 44 to move upward to clamp it. At the same time, due to the upward movement of the inclined slider 44, the distance between the vertical portion of the movable groove 58 and the cylinder 57 gradually increases. At this time, the cylinder 57 gradually moves toward the direction close to the inclined slider 44 under the action of the compression spring 56, and then drives the rotating plate 53 to rotate through the connecting rod 51, thereby driving the round rod 54 to move in the fixed block 55 through the rotating plate 53, so as to drive the two groups of knocking parts 541 away from the clamping surfaces of the two groups of inclined sliders 44, so as to facilitate clamping, thereby facilitating the subsequent tensile test;

[0068] When the tensile test is completed, the cylinder 48 is started to contract, driving the inclined slider 44 to loosen the clamping of the steel pipe wall material. At this time, the steel pipe wall material will be pressed on the clamping surface of one group of inclined sliders 44, and in the process of the cylinder 48 driving the inclined slider 44 to reset, under the action of the vertical part of the movable groove 58, the two groups of cylinders 57 are driven to reset, so as to drive the rotating plate 53 to reset through the connecting rod 51, and synchronously drive the two groups of round rods 54 to reset, and the knocking part 541 can be driven to reset until the steel pipe wall material on the clamping surface of the inclined slider 44 is ejected. Since the knocking part 541 is arranged in two groups, and the clamping surface of the inclined slider 44 is exposed after the two groups of knocking parts 541 are reset, the knocking part 541 can be used to eject the steel pipe wall material on the clamping surface of any group of inclined sliders 44.

[0069] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A broken belt buffer clamping mechanism for a stretching machine, characterized in that: include: Workbench (1); A lower clamping assembly (4), wherein the lower clamping assembly (4) is arranged on the workbench (1); An upper clamping assembly (2), wherein the upper clamping assembly (2) is arranged on the workbench (1), and the upper clamping assembly (2) comprises: A support frame (21), the support frame (21) being mounted on the workbench (1), two groups of moving modules being arranged inside the support frame (21), and a crossbeam (22) being arranged on the output end of the moving module; A chassis (3), the chassis (3) being mounted on the bottom of the crossbeam (22), and a limiting ring (39) being mounted inside the chassis (3); Two sets of screw rods (33), the screw rods (33) are installed inside the chassis (3), and knobs (34) are threadedly installed on the screw rods (33); Two sets of sliding rods (36), wherein the sliding rods (36) are slidably arranged inside the screw rod (33), and a terminal (37) is installed at one end of the sliding rod (36); Two groups of shock absorbing springs (35), wherein the shock absorbing springs (35) are arranged between the knob (34) and the end (37), and the shock absorbing springs (35) are sleeved on the outside of the screw rod (33); A movable plate (38), the movable plate (38) being mounted at the bottom of the two groups of end heads (37), the movable plate (38) being slidably arranged inside the chassis (3), and the movable plate (38) being located above the limiting ring (39); A connecting tube (31), the connecting tube (31) is installed at the bottom of the moving plate (38), and an upper clamping portion (32) is provided on the connecting tube (31).

2. A broken belt buffer clamping mechanism for a stretching machine according to claim 1, characterized in that: The lower clamping assembly (4) comprises two groups of bases (41) mounted on the workbench (1), at least two groups of connecting rods (402) are mounted on the bases (41), and a top plate (403) is mounted on the top of the connecting rods (402).

3. A broken belt buffer clamping mechanism for a stretching machine according to claim 2, characterized in that: A buffer seat (401) is installed on the base (41), a buffer shell (408) is installed on the buffer seat (401), a straight rod (407) is arranged inside the buffer shell (408), a pressure plate is arranged at the bottom of the straight rod (407), and a buffer spring (409) is arranged between the bottom of the pressure plate and the buffer seat (401).

4. A broken belt buffer clamping mechanism for a stretching machine according to claim 3, characterized in that: The straight rod (407) passes through the top plate (403) and exposes the top of the top plate (403); a mounting plate (404) is installed on the top of the straight rod (407); two groups of guide rods (405) are installed on the bottom of the mounting plate (404); the guide rods (405) pass through the top plate (403); the guide rods (405) and the straight rod (407) are both provided with threaded portions, and nuts (406) are threadedly installed on the threaded portions.

5. A broken belt buffer clamping mechanism for a stretching machine according to claim 4, characterized in that: A lower clamping portion (42) is provided on the mounting plate (404), and the lower clamping portion (42) comprises a clamping block (43) mounted on two groups of mounting plates (404), and a groove (432) is provided on the clamping block (43), and the groove (432) has two groups of inclined surfaces (431) arranged opposite to each other.

6. A broken belt buffer clamping mechanism for a stretching machine according to claim 5, characterized in that: A cylinder (48) is installed inside the groove (432), a push rod (47) is installed at the output end of the cylinder (48), a disk (45) is installed on the top of the push rod (47), two groups of inclined sliding blocks (44) are slidably arranged on the top of the disk (45), and connecting blocks (46) are installed at the bottom of the two groups of inclined sliding blocks (44), and cavities are opened on the connecting blocks (46). The disk (45) is located in the two groups of cavities, and the bottom of the disk (45) is against the bottom wall of the cavity.

7. A broken belt buffer clamping mechanism for a stretching machine according to claim 6, characterized in that: The inclined ends of the two groups of inclined sliding blocks (44) are both provided with moving grooves (58).

8. The broken belt buffer clamping mechanism for a stretching machine according to claim 5, characterized in that: The upper clamping assembly (2) and the lower clamping assembly (4) are both provided with a knocking assembly (5), and the knocking assembly (5) includes two groups of slide grooves (52) opened inside the clamping block (43), a rotating plate (53) is rotatably installed at the center of the slide groove (52), and a connecting rod (51) is hinged at the bottom of the rotating plate (53), and a through groove is opened inside the clamping block (43), and the through groove is connected to the slide groove (52).

9. A broken belt buffer clamping mechanism for a stretching machine according to claim 8, characterized in that: A circular groove is provided inside the clamping block (43), which is connected to the through groove. A cylinder (57) is slidably provided inside the circular groove. The cylinder (57) is connected to an end of the connecting rod (51) away from the rotating plate (53). A compression spring (56) is provided between one side of the cylinder (57) and the circular groove.

10. A broken belt buffer clamping mechanism for a stretching machine according to claim 9, characterized in that: A round rod (54) is hinged on the top of the rotating plate (53), and a knocking portion (541) is provided at one end of the round rod (54) away from the rotating plate (53). A fixing block (55) is installed on the top of the clamping block (43), and the round rod (54) passes through the fixing block (55).

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