Silencer inner cover spot welding tension testing machine

Abstract

The utility model relates to a silencer inner cover spot welding tension tester which is characterized in that a first chuck and a second chuck which are oppositely arranged up and down are arranged in a test space of a base, and the second chuck is driven by a cylinder to get close to or get away from the first chuck; the front face of a first clamping base of the first clamping head is concaved inwards to form a first groove, and two first clamping blocks are installed in the first groove respectively and pulled by a first manual mechanism so that the two first clamping blocks can move along the left inner side wall and the right inner side wall of the first groove respectively to achieve clamping or releasing. The front face of a second clamping base of the second clamping head is concaved inwards to form a second groove, and two second clamping blocks are installed in the second groove respectively and pulled by a second manual mechanism so that the two second clamping blocks can move along the left inner side wall and the right inner side wall of the second groove respectively to achieve clamping or releasing. The device is scientific and reasonable in structure, low in investment cost, used for testing the welding connection condition of the silencer inner cover and the base, capable of achieving mechanical automatic testing, time-saving, labor-saving, high in production efficiency, suitable for mass production and good in testing accuracy and stability.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of silencer manufacturing, especially the technical field of silencer inner cover spot welding tension test. BACKGROUND

[0002] As shown in figure 1, when manufacturing the silencer, in order to prevent loosening and meet the requirement of air impact, the inner cover 81 and the base 80 are generally connected together by spot welding after the inner cover 81 is placed into the base 80, and the welding condition is tested by pulling mode; however, the traditional manual pulling detection has low accuracy, which leads to unstable product quality, is not conducive to mass production and affects enterprise development. SUMMARY

[0003] The utility model discloses a silencer inner cover spot welding tension testing machine, realizes that mechanical replaces manual work, and very good solution above-mentioned technical problem.

[0004] In order to achieve the above object, the utility model adopts the following technical scheme:

[0005] The silencer inner cover spot welding tension testing machine includes a machine base, a test space is arranged on the machine base, a first chuck is arranged at the inner lower part of the test space, and a second chuck is arranged at the inner upper part of the test space, the first chuck and the second chuck are arranged oppositely, and the second chuck is driven by a cylinder to approach or move away from the first chuck.

[0006] The first chuck has a first chuck seat standing vertically, a first groove is arranged in the front surface of the first chuck seat, and the first groove penetrates the upper end of the first chuck seat; two first clamping blocks are respectively installed on the left and right inner side walls of the first groove and are pulled by a first manual mechanism, so that the two first clamping blocks can move along the left and right inner side walls of the first groove respectively, and the two first clamping blocks are relatively close to clamping or move away from releasing.

[0007] The second chuck has a second chuck seat hanging vertically, a second groove is arranged in the front surface of the second chuck seat, and the second groove penetrates the lower end of the second chuck seat; two second clamping blocks are respectively installed on the left and right inner side walls of the second groove and are pulled by a second manual mechanism, so that the two second clamping blocks can move along the left and right inner side walls of the second groove respectively, and the two second clamping blocks are relatively close to clamping or move away from releasing.

[0008] Further, the lower end of the first chuck seat is provided with a downwardly protruding mounting column, the protruding end of the mounting column is provided with a outwardly expanded first clamping edge, and the mounting column and the first clamping edge form a T shape; the inner lower part of the test space is provided with a boss, and a first T-shaped clamping groove is arranged on the boss; the first chuck seat is clamped into the first T-shaped clamping groove through the mounting column and the first clamping edge to establish a detachable assembly state, so that the first chuck can be detachably moved.

[0009] The second clamping seat is provided with an upwardly protruding hanging column, and the protruding end of the hanging column is provided with an outwardly expanded second clamping edge, and the hanging column and the second clamping edge form a T shape; the inner upper portion of the test space is provided with a hanging seat, and a second T-shaped clamping groove is arranged on the hanging seat; the second clamping seat is clamped into the second T-shaped clamping groove through the hanging column and the second clamping edge to establish a detachable assembly state, so that the second clamping head can be detachably moved; the hanging seat is fixed on a lifting seat, the lifting seat is installed on the base and supported by a guide column prearranged on the base, and the lifting seat is connected with the extension end of the air cylinder to realize the movement of the lifting seat driven by the air cylinder to drive the second clamping head to move close to or away from the first clamping head.

[0010] The left and right inner side walls of the first groove are designed as inclined surfaces, so that the first groove gradually narrows towards the upper end of the first clamping seat; the back portions of the two first clamping blocks are correspondingly designed as inclined surfaces, so that the two first clamping blocks are relatively close to each other or away from each other by the inclined surface relative abutting movement when the two first clamping blocks move along the left and right inner side walls of the first groove; the first manual mechanism includes a first push-pull connecting rod, a first operating rod and a first pressure maintaining spring, the first push-pull connecting rod is assembled on the first clamping seat and located below the two first clamping blocks, one end of the first push-pull connecting rod is connected with the two first clamping blocks, and the other end of the first push-pull connecting rod is pushed by the first pressure maintaining spring; one side of the first push-pull connecting rod is provided with a first rack portion, which is used for meshing connection with a first gear portion prearranged on the first operating rod, the first operating rod is installed on the first clamping seat by a hinged connection, so that an operator can pull the first operating rod to rotate, and the first gear portion is meshed to drive the first rack portion to drive the first push-pull connecting rod to move, thereby realizing the movement of the two first clamping blocks along the left and right inner side walls of the first groove.

[0011] The lower end of the two first clamping blocks is provided with a first hook, and the upper end of the first push-pull connecting rod is provided with a radially outwardly protruding third clamping edge, which simultaneously hooks the first hooks of the two first clamping blocks.

[0012] The first clamping block is inserted into the first groove and abuts against the inner side walls of the first groove by the back portion, and the outer side edge of the first clamping block is pressed by a first limiting block, the first limiting block is installed on the first clamping seat and provided with a first guide rib, the first guide rib is inserted into a first guide sliding groove prearranged on the outer side edge of the first clamping block, and the guide of the first guide sliding groove and the first guide rib is consistent with the inclined direction of the corresponding inner side walls of the first groove.

[0013] The scheme is further, the left and right inner side walls of the second groove are designed as inclined surfaces, so that the second groove gradually narrows to the lower bottom end of the second clamping base; the back parts of the two second clamping blocks are correspondingly designed as inclined surfaces, so that the two second clamping blocks are relatively close to each other or away from each other by using the inclined surfaces to relatively abut when moving along the left and right inner side walls of the second groove; the second manual mechanism includes a second push-pull connecting rod, a second operating rod and a second pressure maintaining spring, the second push-pull connecting rod is assembled on the second clamping base and located above the two second clamping blocks, one end of the second push-pull connecting rod is connected to the two second clamping blocks at the same time, and the other end of the second push-pull connecting rod is pushed and abutted by the second pressure maintaining spring; one side of the second push-pull connecting rod is provided with a second rack part, the second rack part is used for meshing connection with a second gear part pre-set on the second operating rod, the second operating rod is installed on the second clamping base in a hinged connection mode, so that an operator can pull the second operating rod to rotate, and the second gear part is meshed to drive the second rack part to move the second push-pull connecting rod, so that the two second clamping blocks move along the left and right inner side walls of the second groove.

[0014] The scheme is further, the upper ends of the two second clamping blocks are provided with second hooks, and the lower end of the second push-pull connecting rod is provided with a fourth clamping edge which protrudes radially outward, and the fourth clamping edge hooks the second hooks of the two second clamping blocks at the same time.

[0015] The scheme is further, the two second clamping blocks are embedded into the second groove and abut against the inner side walls of the second groove by the back parts, and the outer side edges of the second clamping blocks are pressed by second limiting blocks, the second limiting blocks are installed on the second clamping base and are provided with second guide ribs, the second guide ribs are inserted into second guide sliding grooves pre-set on the outer side edges of the second clamping blocks, and the guide of the second guide sliding grooves and the second guide ribs is consistent with the inclined direction of the corresponding inner side walls of the second groove.

[0016] The scheme is further, the base is designed vertically, and the bottom of the base is further provided with a roller assembly which facilitates movement and locking.

[0017] The utility model discloses scientific, reasonable, and low investment cost, through first chuck and second chuck form upper and lower relative settings, for clamping and pulling test muffler inner cover and base welding connection condition, realize mechanization automatic test, save time and labour, and production efficiency is high, is suitable for mass production, and test accuracy and stability are good, and through the effective design of the structure of the first chuck and the second chuck, greatly facilitate the feeding and discharging work, the clamping is stable and reliable, the labor intensity is reduced, the labor cost investment is reduced, and the enterprise development is helped. BRIEF DESCRIPTION OF DRAWINGS

[0018] ATTACH Figure 1 It is the structure schematic view after the inner cover and the base are welded.

[0019] ATTACH Figure 2This is a schematic diagram of a preferred embodiment of the present invention;

[0020] Appendix Figure 3 for Figure 2 Schematic diagram of the first and second chuck assembly structure in the embodiment;

[0021] Appendix Figure 4 for Figure 3 Enlarged schematic diagram of the first chuck structure in the embodiment;

[0022] Appendix Figure 5 for Figure 3 An exploded view of the first chuck structure in the embodiment;

[0023] Appendix Figure 6 for Figure 3 Enlarged schematic diagram of the second clamp structure in the embodiment;

[0024] Appendix Figure 7 for Figure 3 An exploded view of the second chuck structure in the embodiment;

[0025] Appendix Figure 8 This is a schematic diagram of the clamping test of the first and second clamps of this utility model. Detailed Implementation

[0026] The following will further explain the concept, specific structure and technical effects of this utility model in conjunction with the accompanying drawings, so as to fully understand the purpose, features and effects of this utility model.

[0027] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. These terms are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] See Figure 2 , 3, 4, 5, 6, 7, 8, it is the preferred embodiment structure schematic diagram of the utility model, the utility model relates to a muffler inner cover spot welding tension testing machine, comprising the base 1, the base 1 is vertically arranged and is provided with test space 11 on the base, the height of test space 11 is matched operation, and test space 11 has corresponding fence and door, to facilitate safe operation;The bottom of base 1 is further provided with the roller assembly 16 for moving and locking, facilitating arrangement implementation.In the inner lower portion of test space 11 is provided with the first chuck 2, and the inner upper portion of test space 11 is provided with the second chuck 3, the first chuck 2 and the second chuck 3 are oppositely arranged, and the second chuck 3 is driven by cylinder 4 to realize close or away from the first chuck 2, for force test, and corresponding force sensor can also be equipped, to read the size of force value.The first chuck 2 has the first clamping seat 21 of vertical end seat, the front surface of the first clamping seat 21 is concave and forms the first groove 211, and the first groove 211 penetrates the upper end of the first clamping seat 21;Two first clamping blocks 22 are respectively installed on the left and right inner side walls of the first groove 211 and are pulled by the first manual mechanism, so that the two first clamping blocks 22 can be moved along the left and right inner side walls of the first groove 211 respectively, and the two first clamping blocks 22 are relatively close to clamping or away from releasing;The second chuck 3 has the second clamping seat 31 of vertical hanging, the front surface of the second clamping seat 31 is concave and forms the second groove 311, and the second groove 311 penetrates the lower end of the second clamping seat 31;Two second clamping blocks 32 are respectively installed on the left and right inner side walls of the second groove 311 and are pulled by the second manual mechanism, so that the two second clamping blocks 32 can be moved along the left and right inner side walls of the second groove 311 respectively, and the two second clamping blocks 32 are relatively close to clamping or away from releasing.The structure facilitates the clamping of feeding and discharging, as Figure 8 As shown in the figure, in use, the corresponding tension bars 82 can be welded on the inner cover 81 and the base 80 welded together first, and then the first chuck 2 and the second chuck 3 clamp the corresponding tension bars 82 respectively, and then the cylinder 4 drives the second chuck 3 upward to apply tension F, and then the welding condition of the inner cover 81 and the base 80 is tested, so that it is known that the welding position withstands how much force, whether it meets the airflow impact requirement when the muffler works.

[0029] Referring to Figure 2 , 3, 4, 5, 6, 7, in the embodiment, the lower end of the first clamp seat 21 is provided with a downwardly protruding mounting column 212, the protruding end of the mounting column 212 is provided with a outwardly expanded first clamping edge 213, the mounting column 212 and the first clamping edge 213 form a T shape; the inner lower part of the test space 11 is provided with a boss 12, and a first T-shaped clamping groove 121 is arranged on the boss 12, the first clamp seat 21 is clamped into the first T-shaped clamping groove 121 through the mounting column 212 and the first clamping edge 213 to establish a detachable assembly state, so that the first clamp head 2 can be detachably assembled, which is convenient for disassembly and maintenance, and is also beneficial to replace different clamp heads, improve test efficiency and usability. In the embodiment, in order to facilitate production, the mounting column 212 is combined with the first clamp seat 21 through a combination mode, that is, a first mounting platform 214 is integrally extended at the upper end of the mounting column 212, the first mounting platform 214 is attached to the lower end of the first clamp seat 21 and is locked by a screw.

[0030] The upper end of the second clamp seat 31 is provided with an upwardly protruding pendant column 312, the protruding end of the pendant column 312 is provided with a outwardly expanded second clamping edge 313, the pendant column 312 and the second clamping edge 313 form a T shape; the inner upper part of the test space 11 is provided with a hanging seat 13, and a second T-shaped clamping groove 131 is arranged on the hanging seat 13, the second clamp seat 31 is clamped into the second T-shaped clamping groove 131 through the pendant column 312 and the second clamping edge 313 to establish a detachable assembly state, so that the second clamp head 3 can be detachably assembled, which is convenient for disassembly and maintenance, and is also beneficial to replace different clamp heads, improve test efficiency and usability. In the embodiment, in order to facilitate production, the pendant column 312 is combined with the second clamp seat 31 through a combination mode, that is, a second mounting platform 314 is integrally extended at the lower end of the pendant column 312, the second mounting platform 314 is attached to the lower end of the second clamp seat 31 and is locked by a screw. The hanging seat 13 is fixed on the lifting seat 5, the lifting seat 5 is installed on the base 1 and is supported by the guide column 14 pre-provided on the base, the lifting seat 5 and the telescopic end of the air cylinder 4 are connected together, the air cylinder drives the lifting seat to move to drive the second clamp head 3 to approach or move away from the first clamp head 2. In the embodiment, the guide column 14 has two parallel protrusions upwardly from the inner lower part of the test space 11, the top end of the guide column 14 is fixedly provided with a mounting plate 15, the lifting seat 5 is sleeved on the guide column 14 through a shaft sleeve, and the air cylinder 4 is installed in an inverted manner on the mounting plate 15, the air cylinder 4 drives the lifting seat 5 to ascend and descend along the guide column 14.

[0031] In the embodiment, the notch of the first groove 211 faces the front of the operator, and the left and right inner side walls of the first groove 211 are designed as inclined surfaces, so that the first groove 211 gradually narrows towards the upper end of the first clamping seat 21, and presents a shape like a pair of trousers. The back of the two first clamping blocks 22 is correspondingly designed as an inclined surface, so that when the two first clamping blocks 22 move along the left and right inner side walls of the first groove 211, the inclined surfaces are relatively abutted to achieve the relative approaching of the two first clamping blocks 22 to clamp or the relative moving away to release. Through the notch of the front-facing first groove 211, the pull strip 82 is conveniently loaded, and the inner clamping surface of the two first clamping blocks 22 is provided with corresponding anti-skid lines to increase the clamping friction. The first manual mechanism includes a first push-pull connecting rod 61, a first operating rod 62 and a first pressure maintaining spring 63. The first push-pull connecting rod 61 is assembled on the first clamping seat 21 and located below the two first clamping blocks 22. In the embodiment, the first clamping seat 21 is pre-provided with a first sliding groove 215, which is located below the first groove 211 and vertically communicates with the first groove 211. The first push-pull connecting rod 61 is embedded in the first sliding groove 215 and can move up and down. One end of the first push-pull connecting rod 61 is connected to the two first clamping blocks 22 at the same time, so as to synchronously push and pull the two first clamping blocks 22. The other end of the first push-pull connecting rod 61 is pushed by the first pressure maintaining spring 63. The lower end of the first pressure maintaining spring 63 is positioned on the first clamping seat 21, and the upper end of the first pressure maintaining spring 63 supports the first push-pull connecting rod 61. The first pressure maintaining spring 63 always pushes the first push-pull connecting rod 61 upward, so that the first push-pull connecting rod 61 drives the two first clamping blocks 22 to move upward, and the relative abutting movement of the inclined surfaces is utilized to achieve the relative approaching of the two first clamping blocks 22 to the clamping posture. One side of the first push-pull connecting rod 61 is provided with a first rack part 611, which is used for meshing connection with a first gear part 621 pre-provided on the first operating rod 62. The first operating rod 62 is installed on the first clamping seat 21 in a hinged connection mode, so that the operator can pull the first operating rod 62 to rotate, and make the first gear part 621 meshing drive the first rack part 611 to drive the first push-pull connecting rod 61 to move, so as to realize the movement of the two first clamping blocks 22 along the left and right inner side walls of the first groove 211. In the embodiment, the first operating rod 62 is hingedly connected to the first clamping seat 21 in a first pin shaft 216 penetrating mode. The first clamping seat 21 is pre-provided with corresponding first support towers 217 to support the first pin shaft 216. The first support towers 217 are locked on the first clamping seat 21 by screws, and there are two first support towers 217 which are symmetrically arranged. The first operating rod 62 is embedded between the two first support towers 217 and connected by the first pin shaft 216 penetrating. The two ends of the first pin shaft 216 are respectively positioned on the two first support towers 217. The first chuck 2 with the above structure is not only easy to manufacture and assemble, but also beneficial to the operation of feeding and discharging, and utilizes the inclined surface pushing and extruding action to clamp, so that the clamping is more stable and not easy to loosen, and the more pulling, the tighter the clamping.

[0032] When the first clamp head 2 is opened, the first gear part 621 is engaged to drive the first rack part 611 and the first push-pull link 61 moves downward to compress the first pressure spring 63, and at the same time, the two first clamping blocks 22 are pulled to move along the first groove 211 and be relatively far away from each other. At this time, the drawbar can be removed or installed. After the drawbar 82 is installed, the first operating lever 62 is pulled in the opposite direction, the first gear part 621 is engaged to drive the first rack part 611 and the first push-pull link 61 moves upward to push the two first clamping blocks 22 to move upward, so that the two first clamping blocks 22 move along the first groove 211 and are relatively close to each other to clamp, that is, the first clamp head 2 is closed and clamped, and at the same time, the first pressure spring 63 is released and pushes the first push-pull link 61, further increasing the clamping effect.

[0033] The lower end of the two first clamping blocks 22 is provided with a first hook 221, and the upper end of the first push-pull link 61 is provided with a third clamping edge 612 which is radially outwardly convex, and the third clamping edge 612 hooks the first hooks 221 of the two first clamping blocks 22 at the same time, which further optimizes the manufacturing and assembly, and is convenient for disassembly, replacement and maintenance. The first clamping block 22 is embedded into the first groove 211 and abuts against the inner side wall of the first groove 211, and the outer side of the first clamping block 22 is pressed by the first limiting block 23 which is installed on the first clamping seat 21 and is provided with a first guide rib 231 which is inserted into the first guide sliding groove 222 of the outer side of the first clamping block 22, and the guide of the first guide sliding groove 222 and the first guide rib 231 is consistent with the inclination direction of the corresponding inner side wall of the first groove 211. This structure facilitates the assembly and positioning of the first clamping block 22, and at the same time, increases the smoothness and stability of movement, and improves the clamping effect.

[0034] In the embodiment, the notch of the second groove 311 faces the front of the operator, and the left and right inner side walls of the second groove 311 are designed as inclined surfaces, so that the second groove 311 gradually narrows towards the lower end of the second clamping seat 31, and has an inverted eight-shaped appearance; the back of the two second clamping blocks 32 is correspondingly designed as an inclined surface, so that the two second clamping blocks 32 relatively approach each other to be clamped or relatively move away from each other to be released by using the inclined surface relative abutting movement when the two second clamping blocks 32 move along the left and right inner side walls of the second groove 311. The notch of the front-facing second groove 311 facilitates the loading of the pull strip 82, and the inner clamping surface of the two second clamping blocks 32 is provided with corresponding anti-skid lines to increase the clamping friction. The second manual mechanism includes a second push-pull connecting rod 71, a second operating lever 72 and a second pressure maintaining spring 73, and the second push-pull connecting rod 71 is assembled on the second clamping seat 31 and located above the two second clamping blocks 32. In the embodiment, the second clamping seat 31 is provided with a second sliding groove 315, which is located above the second groove 311 and vertically communicates with the second groove 311, and the second push-pull connecting rod 71 is embedded in the second sliding groove 315 and can move up and down. One end of the second push-pull connecting rod 71 is connected to the two second clamping blocks 32 at the same time, so as to synchronously push and pull the two second clamping blocks 32; the other end of the second push-pull connecting rod 71 is pushed by the second pressure maintaining spring 73; the upper end of the second pressure maintaining spring 73 is positioned on the first clamping seat 21, and the lower end of the second pressure maintaining spring 73 supports the second push-pull connecting rod 71; the second pressure maintaining spring 73 always pushes the second push-pull connecting rod 71 downward, and then the second push-pull connecting rod 71 drives the two second clamping blocks 32 to move downward, so as to achieve the relative approaching clamping posture of the two second clamping blocks 32 by using the inclined surface relative abutting movement. One side of the second push-pull connecting rod 71 is provided with a second rack part 711, which is used for meshing connection with a second gear part 721 provided on the second operating lever 72; the second operating lever 72 is installed on the second clamping seat 31 by a hinged connection, so that the operator can pull the second operating lever 72 to rotate, and make the second gear part 721 meshing drive the second rack part 711 to drive the second push-pull connecting rod 71 to move, so as to realize the movement of the two second clamping blocks 32 along the left and right inner side walls of the second groove 311. In the embodiment, the second operating lever 72 is hingedly connected to the second clamping seat 31 by a second pin shaft 316, and the second clamping seat 31 is provided with corresponding second support towers 317 to support the second pin shaft 316; the second support towers 317 are locked on the second clamping seat 31 by screws, and there are two second support towers 317 which are symmetrically arranged; the second operating lever 72 is embedded between the two second support towers 317 and connected by the second pin shaft 316, and the two ends of the second pin shaft 316 are positioned on the two second support towers 317 respectively. The second chuck 3 with the above structure is not only easy to manufacture and assemble, but also is beneficial to the operation of feeding and discharging, and clamping by using the inclined surface pushing and extruding effect, so that the clamping is more stable and not easy to be released, and the more pulling, the tighter the clamping.

[0035] The upper end of the two second clamping blocks 32 is provided with a second hook 321, and the lower end of the second push-pull connecting rod 71 is provided with a radially outward protruding fourth clamping edge 712, which simultaneously hooks the second hooks 321 of the two second clamping blocks 32. This structure further optimizes the manufacturing and assembly and facilitates disassembly, replacement, maintenance, etc. The second clamping block 32 is inserted into the second groove 311 and abuts against the inner side wall of the second groove 311, and the outer side of the second clamping block 32 is pressed by the second limiting block 33, which is installed on the second clamping seat 31 and is provided with a second guide rib 331, which is inserted into the second guide sliding groove 322 pre-provided on the outer side of the second clamping block 32. The guide of the second guide sliding groove 322 and the second guide rib 331 is consistent with the inclination direction of the corresponding inner side wall of the second groove 311. This structure facilitates the assembly and positioning of the second clamping block 32, and simultaneously increases the smoothness and stability of movement, and improves the clamping effect.

[0036] When the second chuck 3 is opened, the second operation lever 72 is pulled to make the second gear part 721 engage and drive the second rack part 711 and drive the second push-pull connecting rod 71 to move upward, compressing the second pressure maintaining spring 73, and simultaneously pulling the two second clamping blocks 32 to move upward, so that the two second clamping blocks 32 move along the left and right inner side walls of the second groove 311 and are relatively far away from each other. At this time, the operation of removing or loading the drawbar can be performed. Conversely, after the drawbar 82 is loaded, the second operation lever 72 is pulled in the opposite direction, the second gear part 721 engages and drives the second rack part 711 and drives the second push-pull connecting rod 71 to move downward, pushing the two second clamping blocks 32 to move downward, so that the two second clamping blocks 32 move along the left and right inner side walls of the second groove 311 and are relatively close to each other for clamping, that is, the second chuck 3 is closed for clamping, and at the same time, the second pressure maintaining spring 73 is released and pushes the second push-pull connecting rod 71, further increasing the clamping effect.

[0037] The utility model discloses scientific, reasonable, investment cost is low, through first chuck and second chuck form upper and lower relative settings, for clamping and pulling test muffler inner cover and base welding connection condition, realize mechanization automatic test, save time and effort, production efficiency is high, be suitable for mass production, test accuracy and stability are good, and through the effective design of the structure of the first chuck and the second chuck, the feeding and discharging work is greatly facilitated, the clamping is stable and reliable, the labor intensity is reduced, the labor cost investment is reduced, and the enterprise development is helpful.

[0038] Although the preferred embodiments of the utility model have been described in combination with the drawings, the utility model should not be limited to the structure and operation exactly the same as the above description and drawings. For those skilled in the art, many equivalent improvements and changes can be made to the above embodiments through logical analysis, reasoning or limited experiments without exceeding the concept and scope of the utility model, but these improvements and changes should all belong to the scope of the utility model claimed.

Claims

1. A spot welding tensile testing machine for a muffler inner cover, comprising a base (1), characterized in that: The base (1) is provided with a test space (11), and a first chuck (2) is provided in the lower part of the test space (11), and a second chuck (3) is provided in the upper part of the test space (11). The first chuck (2) and the second chuck (3) are arranged opposite each other, and the second chuck (3) is driven by the cylinder (4) to move closer to or away from the first chuck (2). The first clamp (2) has a first clamping seat (21) that sits upright. The front of the first clamping seat (21) is recessed to form a first groove (211), and the first groove (211) passes through the top of the first clamping seat (21). Two first clamping blocks (22) are respectively installed on the left and right inner walls of the first groove (211) and are pulled by a first manual mechanism, so that the two first clamping blocks (22) can move along the left and right inner walls of the first groove (211) respectively, so that the two first clamping blocks (22) can be clamped relatively close or released away from each other. The second clamp (3) has a vertically suspended second clamping seat (31). The front of the second clamping seat (31) is recessed to form a second groove (311), and the second groove (311) passes through the bottom end of the second clamping seat (31). Two second clamping blocks (32) are respectively installed on the left and right inner walls of the second groove (311) and pulled by the second manual mechanism, so that the two second clamping blocks (32) can move along the left and right inner walls of the second groove (311) respectively, so that the two second clamping blocks (32) can be clamped relatively close or released away from each other.

2. The spot welding tensile testing machine for the inner cover of the muffler according to claim 1, characterized in that: The first clamp (21) has a downwardly protruding mounting post (212) at its lower end. The protruding end of the mounting post (212) has an outwardly expanding first retaining edge (213). The mounting post (212) and the first retaining edge (213) form a T-shape. The lower inner part of the test space (11) has a boss (12) and a first T-shaped retaining groove (121) on the boss (12). The first clamp (21) is inserted into the first T-shaped retaining groove (121) by the mounting post (212) and the first retaining edge (213) to establish a detachable assembly state, so that the first clamp (2) can be movably disassembled.

3. The spot welding tensile testing machine for the inner cover of the muffler according to claim 1, characterized in that: The upper top of the second clamp (31) is provided with an upwardly protruding hanging column (312), and the protruding end of the hanging column (312) is provided with an outwardly flared second retaining edge (313). The hanging column (312) and the second retaining edge (313) form a T-shape. The upper inner part of the test space (11) is provided with a suspension seat (13), and a second T-shaped retaining groove (131) is provided on the suspension seat (13). The second clamp (31) is connected by the hanging column (312) and the second T-shaped retaining groove (131). The edge (313) is inserted into the second T-shaped slot (131) to establish a detachable assembly state, so that the second chuck (3) can be movably disassembled and assembled; the suspension seat (13) is fixed on the lifting seat (5), which is installed on the machine base (1) and supported by the guide column (14) preset on the machine base. The lifting seat (5) is connected to the telescopic end of the cylinder (4) so ​​that the cylinder drives the lifting seat to move to move the second chuck (3) closer to or away from the first chuck (2).

4. The spot welding tensile testing machine for the inner cover of the muffler according to claim 1, characterized in that: The left and right inner walls of the first groove (211) are designed as inclined surfaces, so that the first groove (211) gradually narrows towards the top of the first clamping seat (21); the backs of the two first clamping blocks (22) are designed with corresponding inclinations, so that when the two first clamping blocks (22) move along the left and right inner walls of the first groove (211), they can move closer to each other to clamp or move further apart to release; the first manual mechanism includes a first push-pull linkage (61), a first operating lever (62) and a first pressure holding spring (63). The first push-pull linkage (61) is assembled on the first clamping seat (21) and located below the two first clamping blocks (22). One end of the first push-pull linkage (61) is connected to the first clamping seat (21) and located below the two first clamping blocks (22). The first clamping blocks (22) are connected at the same time, and the other end of the first push-pull link (61) is pushed by the first pressure holding spring (63); the first push-pull link (61) is provided with a first rack part (611) on one side, which is used to mesh with the first gear part (621) preset on the first operating rod (62). The first operating rod (62) is installed on the first clamping seat (21) by a hinge connection, so that the operator can turn the first operating rod (62) to rotate, and let the first gear part (621) mesh to drive the first rack part (611) to drive the first push-pull link (61) to move, thereby realizing the movement of the two first clamping blocks (22) along the left and right inner walls of the first groove (211).

5. The spot welding tensile testing machine for the inner cover of the muffler according to claim 4, characterized in that: The lower ends of the two first clamping blocks (22) are provided with first hooks (221), and the upper end of the first push-pull connecting rod (61) is provided with a radially protruding third locking edge (612). The third locking edge (612) simultaneously hooks the first hooks (221) of the two first clamping blocks (22).

6. The spot welding tensile testing machine for the inner cover of the muffler according to claim 4, characterized in that: The first clamping block (22) is inserted into the first groove (211) and its back is against the inner wall of the first groove (211). The outer side of the first clamping block (22) is pressed by the first limiting block (23). The first limiting block (23) is installed on the first clamping seat (21) and is provided with a first guide rib (231). The first guide rib (231) is inserted into the first guide groove (222) on the outer side of the first clamping block (22). The guidance of the first guide groove (222) and the first guide rib (231) is consistent with the inclination direction of the corresponding inner wall of the first groove (211).

7. The spot welding tensile testing machine for the inner cover of the muffler according to claim 1, characterized in that: The left and right inner walls of the second groove (311) are designed as inclined surfaces, so that the second groove (311) gradually narrows towards the bottom end of the second clamping seat (31); the backs of the two second clamping blocks (32) are designed with corresponding inclinations, so that when the two second clamping blocks (32) move along the left and right inner walls of the second groove (311), they can use the relative abutment movement of the inclined surfaces to achieve relative close clamping or release of the two second clamping blocks (32); the second manual mechanism includes a second push-pull linkage (71), a second operating lever (72) and a second pressure holding spring (73). The second push-pull linkage (71) is assembled on the second clamping seat (31) and located above the two second clamping blocks (32). One end of the second push-pull linkage (71) is connected to the second clamping seat (31) and located above the two second clamping blocks (32). The two second clamping blocks (32) are connected at the same time, and the other end of the second push-pull link (71) is pushed by the second pressure holding spring (73); a second rack part (711) is provided on one side of the second push-pull link (71), which is used to mesh with the second gear part (721) preset on the second operating rod (72). The second operating rod (72) is installed on the second clamping seat (31) by a hinge connection, so that the operator can turn the second operating rod (72) to rotate, and let the second gear part (721) mesh to drive the second rack part (711) to drive the second push-pull link (71) to move, thereby realizing the movement of the two second clamping blocks (32) along the left and right inner walls of the second groove (311).

8. The spot welding tensile testing machine for the inner cover of the muffler according to claim 7, characterized in that: The upper ends of the two second clamping blocks (32) are provided with second hooks (321), and the lower end of the second push-pull connecting rod (71) is provided with a radially protruding fourth locking edge (712). The fourth locking edge (712) simultaneously hooks the second hooks (321) of the two second clamping blocks (32).

9. The spot welding tensile testing machine for the inner cover of the muffler according to claim 7, characterized in that: The second clamping block (32) is inserted into the second groove (311) and its back is against the inner wall of the second groove (311). The outer side of the second clamping block (32) is pressed by the second limiting block (33). The second limiting block (33) is installed on the second clamping seat (31) and is provided with a second guide rib (331). The second guide rib (331) is inserted into the second guide groove (322) on the outer side of the second clamping block (32). The guidance of the second guide groove (322) and the second guide rib (331) is consistent with the inclination direction of the corresponding inner wall of the second groove (311).

10. The spot welding tensile testing machine for the inner cover of the muffler according to claim 1, characterized in that: The base (1) is designed vertically, and the bottom of the base (1) is also provided with a roller assembly (16) for easy movement and locking.

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