Limiting assembly applied to automobile threshold welding

Abstract

The utility model discloses a limit assembly applied to automobile doorsill welding, which comprises an operating platform applied to automobile doorsill welding, a control panel is arranged at the top end of the operating platform applied to automobile doorsill welding, and an automobile doorsill body is arranged at the top end of the operating platform applied to automobile doorsill welding. Two sets of jacking and abutting assemblies are arranged in the top end of the automobile doorsill body, five output conversion pieces are arranged at the top end of the working table applied to automobile doorsill welding, the output ends of the output conversion pieces are connected with the output ends of second air cylinders, and connecting frames are hinged to the outer side walls of the output conversion pieces. In the using process, the automobile doorsill body can be limited and fixed in a multi-section limiting mode, the automobile doorsill body can be stably limited and clamped in the mode, and the stability and accuracy of the automobile doorsill body can be improved in the welding process of the automobile doorsill body.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile door sill welding, in particular to a limiting component used for automobile door sill welding. Background Art

[0002] At present, the processing procedures of automobile outer door sill parts mainly include stamping and welding feeding. The stamping process is used to process cold-punched single-piece semi-finished products, and the welding of nuts on the welding surface of the door sill parts is completed through the welding feeding process for the connection and installation of components such as airbag sensors.

[0003] In the prior art, a limit assembly is used for welding automobile door sills. During the process of limiting the automobile door sills, since the traditional limit assembly is difficult to stably limit and fix the automobile door sills on both sides, two sets of equipment are required to limit and fix different automobile door sills.

[0004] After searching, it was found that Chinese patent documents disclosed a welding positioning support mechanism for automobile outer door sills (publication number: CN218657525U). The welding positioning support mechanism for automobile outer door sills belongs to the technical field of automobile parts processing equipment. It is composed of a fixed clamping block, a lower electrode rod, a rotation adjustment assembly and a support assembly. The fixed clamping block is connected and fixed on the workbench, the rotation adjustment assembly is connected and fixed in the fixed clamping block, the lower electrode rod is clamped and fixed in the rotation adjustment assembly, and the support assembly is connected and fixed above the lower electrode rod. The support assembly is provided with a positioning pin and a plurality of brackets, each bracket is provided with a support rod. The outer door sill is positioned by the positioning pin and supported by the support rod on the bracket. The welding fixation between the nut and the outer door sill is achieved by the contact between the lower electrode core and the upper electrode core. The utility model can form an effective positioning support for the outer door sill welding, avoid the problems of shaking and welding instability during the welding process, effectively ensure the parallelism of the welding surface and the lower electrode surface of the welding machine, reduce the weld foot indentation in the welding of the outer door sill nut, and further improve the welding quality. However, there are still the following defects:

[0005] Although the above-mentioned automobile outer door sill welding positioning support mechanism can form effective positioning support for the outer door sill welding, avoid shaking and unstable welding problems during the welding process, effectively ensure the parallelism of the welding surface and the lower electrode surface of the welding machine, and reduce the weld foot indentation in the welding of the outer door sill nut, it still has the problem of limiting the automobile door sill in the process of limiting the automobile door sill. Since the traditional limiting components are difficult to firmly limit and fix the automobile door sills on both sides, two sets of equipment are required to limit and fix different automobile door sills. Utility Model Content

[0006] The purpose of the present utility model is to provide a limiting assembly for use in welding automobile door sills, so as to solve the problem raised in the above-mentioned background technology that, during the limiting process of automobile door sills, traditional limiting assemblies are difficult to stably limit and fix the automobile door sills on both sides, resulting in the need for two sets of equipment to limit and fix different automobile door sills.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a limit assembly for automobile threshold welding, comprising a work platform for automobile threshold welding, a control panel installed on the top of the work platform for automobile threshold welding, and a car threshold body provided on the top of the work platform for automobile threshold welding, two groups of lifting and resistance assemblies provided inside the top of the car threshold body, five output conversion members provided on the top of the work platform for automobile threshold welding, and the output ends of the output conversion members are all connected to the output ends of the second cylinder, the outer side walls of the output conversion members are hinged with connecting frames, and the connecting frames are sequentially installed with the first threshold clamping assembly, the second threshold clamping assembly, the third threshold clamping assembly, the fourth threshold clamping assembly and the fifth threshold clamping assembly from left to right, an electric push rod installed on the top of the work platform for automobile threshold welding, and a plurality of laser alignment sensors are installed on the top of the work platform for automobile threshold welding through the mounting plate.

[0008] Preferably, the jacking resistance assembly includes a first resistance block, a first cylinder, a first connecting block and a first plug-in block, the bottom end of the automobile door sill body is in resistance with the top end of the first resistance block, and the bottom end of the first resistance block is connected to the output end of the first cylinder, the outer side wall of the first resistance block is installed with the first connecting block through the angle iron, and the first plug-in block is installed through the top end of the first connecting block.

[0009] Preferably, the first threshold clamping assembly includes a first connecting frame and a second interference block, the first connecting frame is installed at one end of the connecting frame on the left side, and the second interference block is symmetrically installed at the bottom end of the first connecting frame, the bottom end of the second interference block is in conflict with the top of the automobile threshold body, and a third interference block is provided vertically below the second interference block to interfere with the outer side wall of the automobile threshold body, the third interference block is symmetrically installed on both sides of the first mounting frame, and the first mounting frame is installed at the top of the workbench used for automobile threshold welding.

[0010] Preferably, the second threshold clamping assembly includes a second connecting frame and a fourth interference block, the second connecting frame is installed at one end of the connecting frame on the right side, and the fourth interference block is symmetrically installed at the bottom end of the second connecting frame, the bottom end of the fourth interference block interferes with the top of the automobile threshold body, and a fifth interference block is provided vertically below the fourth interference block to interfere with the outer side wall of the automobile threshold body, and the fifth interference block is symmetrically installed on the outer walls of both sides of the second mounting frame.

[0011] Preferably, the outer side walls of the second mounting frame and the first mounting frame are both mounted with second plug-in blocks via angle irons, and the second plug-in blocks are plugged into the bottom end of the vehicle door sill body.

[0012] Preferably, the third threshold clamping assembly includes a third connecting frame, a sixth interference block, a seventh interference block and a second clamping block. The third connecting frame is installed at the front end of the connecting frame on the side close to the first connecting frame, the seventh interference block is installed below the front end of the third connecting frame, and the sixth interference block is installed at the top of the third connecting frame. The bottom ends of the sixth interference block and the seventh interference block both interfere with the top of the automobile threshold body, and second clamping blocks are installed on both sides of the bottom end of the third connecting frame, and one end of the second clamping block respectively interferes with the corresponding inner side walls of the automobile threshold body.

[0013] Preferably, an eighth interference block that interferes with the outer side wall of the automobile door sill body is provided vertically below the seventh interference block, and a first clamping block is installed on the eighth interference block close to the outer side wall of the automobile door sill body, and one end of the first clamping block interferes with the outer side wall of the automobile door sill body, the bottom end of the first clamping block is connected to the top of a fixing bracket installed on the top of a workbench used for welding automobile door sills, and a third clamping block that interferes with the outer side wall of the automobile door sill body is provided on the opposite side of the first clamping block.

[0014] Preferably, the fourth threshold clamping assembly includes a fourth connecting frame, a connecting block, a fourth clamping block and a tenth interference block. The fourth connecting frame is installed at the front end of the connecting frame on the side close to the third connecting frame, and the bottom end of the fourth connecting frame is installed with a fourth clamping block through the connecting block. One end of the fourth clamping block interferes with the inner side wall of the automobile threshold body, and the bottom end of the fourth connecting frame is installed with the tenth interference block that interferes with the top end of the automobile threshold body.

[0015] Preferably, a fifth clamping block is provided on one side of the fourth clamping block, which interferes with the outer side wall of the car door sill body. The fifth clamping block is installed on the side wall of the fixed block, and a ninth interference block is installed on the top of the fixed block. The top of the ninth interference block interferes with the outer side wall of the car door sill body.

[0016] Preferably, the fifth door sill clamping assembly includes a fifth connecting frame and a sixth clamping block, and the fifth connecting frame is installed at the front end of the connecting frame on the side close to the fourth connecting frame, and the sixth clamping blocks are symmetrically installed on both sides of the bottom end of the fifth connecting frame, and one end of the sixth clamping block is in conflict with the inner wall of the automobile door sill body, and the corresponding side of the sixth clamping block is provided with a seventh clamping block that is in conflict with the outer wall of the automobile door sill body.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. During use, the present invention can limit and fix the automobile door sill body through a multi-stage limiting method. This method can firmly limit and clamp the automobile door sill body, thereby helping to improve the stability and accuracy of the automobile door sill body during the welding process.

[0019] 2. During use, the present invention can limit and clamp the symmetrically arranged automobile door sill body, thereby improving the processing efficiency of the automobile door sill body, while reducing development costs, improving production efficiency, and ensuring product quality, thereby improving the practicality and stability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the main structure of the first state of the utility model;

[0021] Figure 2 This is a schematic diagram of the main structure of the second state of the utility model;

[0022] Figure 3 This is a rear view structural diagram of the second state of the utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the assembled parts of the first abutment block, the first cylinder, the first connection block and the first plug-in block in the present invention;

[0024] Figure 5 This is a schematic diagram of the structure of the assembled parts of the second cylinder, the output conversion member, the mounting frame, the first connecting frame, the second contact block, the third contact block and the first mounting frame in the present invention;

[0025] Figure 6 This is a schematic diagram of the structure of the combined parts of the connecting frame, the second connecting frame, the fourth contact block, the fifth contact block, the second mounting frame and the second plug-in block in the utility model;

[0026] Figure 7 This is a schematic diagram of the structure of the combined parts of the connecting frame, the fourth contact block, the fifth contact block and the second mounting frame in the utility model;

[0027] Figure 8 This is a schematic diagram of the structure of the combined parts of the connecting frame, the third connecting frame, the sixth conflicting block, the seventh conflicting block, the eighth conflicting block, the first clamping block, the fixing frame, the second clamping block and the third clamping block in the present invention;

[0028] Figure 9 This is a schematic diagram of the structure of the combined parts of the connecting frame, the fourth connecting frame, the connecting block, the fourth clamping block, the fifth clamping block and the ninth abutting block in the present invention;

[0029] Figure 10This is a schematic diagram of the structure of the combined parts of the connecting frame, the fifth connecting frame, the sixth clamping block, the seventh clamping block and the electric push rod in the utility model.

[0030] Figure: 1. Workbench for welding car door sills; 2. Control panel; 3. Car door sill body; 4. First resistance block; 5. First cylinder; 6. First connecting block; 7. First plug-in block; 8. Second cylinder; 9. Output converter; 10. Connecting frame; 11. First connecting frame; 12. Second resistance block; 13. Third resistance block; 14. First mounting frame; 15. Second connecting frame; 16. Fourth resistance block; 17. Fifth resistance block; 18. Second mounting frame; 19. Second plug-in block ; 20. Third connecting frame; 21. Sixth interference block; 22. Seventh interference block; 23. Eighth interference block; 24. First clamping block; 25. Fixed frame; 26. Second clamping block; 27. Third clamping block; 28. Fourth connecting frame; 29. ​​Connecting block; 30. Fourth clamping block; 31. Fifth clamping block; 32. Ninth interference block; 33. Tenth interference block; 34. Fifth connecting frame; 35. Sixth clamping block; 36. Seventh clamping block; 37. Electric push rod; 38. Laser alignment sensor. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0032] Example 1

[0033] See also Figure 1-10 The utility model provides a limiting component for automobile threshold welding, including a work platform 1 for automobile threshold welding, a control panel 2 for controlling various electrical components fixedly connected to the top of the work platform 1 for automobile threshold welding, a lifting and contacting component for limiting the bottom of the automobile threshold body 3 is symmetrically fixedly connected to the top of the work platform 1 for automobile threshold welding, the lifting and contacting component includes a first contact block 4, a first cylinder 5, a first connecting block 6 and a first plug-in block 7, the bottom end of the automobile threshold body 3 contacts the top of the first contact block 4, and the bottom end of the first contact block 4 is fixedly connected to the output end of the first cylinder 5, the outer side wall of the first contact block 4 is fixedly connected to the first connecting block 6 by an angle iron, and the first plug-in block 7 is installed through the top of the first connecting block 6.

[0034] By setting up the jacking and abutting assembly, during the welding process of the automobile threshold body 3, the jacking and abutting assembly set on both sides of the top of the workbench 1 used for automobile threshold welding works, so that the first cylinder 5 drives the first abutting block 4 to move vertically upward, so that the automobile threshold body 3 can be limited and fixed, and to avoid deviation, when the first abutting block 4 moves and conflicts with the automobile threshold body 3, the first plug-in block 7 will pass through the through hole set at the bottom of the automobile threshold body 3, so as to accurately position the automobile threshold body 3.

[0035] The two ends of the automobile threshold body 3 are respectively connected to the first threshold clamping assembly and the second threshold clamping assembly, and the first threshold clamping assembly includes a first connecting frame 11 and a second interference block 12. The two sides of the top end of one side of the automobile threshold body 3 interfere with the bottom end of the second interference block 12, and the second interference block 12 is symmetrically fixedly connected to the two sides of the bottom end of the first connecting frame 11. A third interference block 13 is arranged vertically below the second interference block 12. The top end of the third interference block 13 interferes with the outer side wall of the automobile threshold body 3. The third interference block 13 is symmetrically fixedly connected to both sides of the first mounting frame 14, and the first mounting frame 14 is fixedly connected to the top of the workbench 1 used for automobile threshold welding.

[0036] By setting up the first door sill clamping assembly, during use, the first connecting frame 11 is used to make an arc movement with the connecting frame 10 and the hinge axis of the output conversion member 9 until the second contact block 12 contacts both sides of the top of one side of the automobile door sill body 3. In this way, the second contact block 12 and the third contact block 13 form a clamping structure to clamp and limit one side of the automobile door sill body 3, and then cooperate with each other to limit and fix the automobile door sill body 3.

[0037] The second door sill clamping assembly includes a second connecting frame 15 and a fourth interference block 16. The two sides of the top of one side of the automobile door sill body 3 away from the second interference block 12 interfere with the bottom end of the fourth interference block 16. The fourth interference block 16 is fixedly connected to the two sides of the bottom end of the second connecting frame 15. A fifth interference block 17 is arranged vertically below the fourth interference block 16, and the top of the fifth interference block 17 interferes with the outer side wall of the automobile door sill body 3. The fifth interference block 17 is symmetrically installed on the outer walls of both sides of the second mounting frame 18. The outer sides of the second connecting frame 15 and the first connecting frame 11 are fixedly connected to a second plug-in block 19 for plugging into the bottom end of the automobile door sill body 3 through angle irons.

[0038] By setting up a second threshold clamping assembly, during use, the second connecting frame 15 is used to make an arc motion with the hinge axis of the connecting frame 10 and the output conversion member 9 until the fourth contact block 16 contacts both sides of the top of one side of the automobile threshold body 3. In this way, the automobile threshold body 3 can be limited and clamped by the bottom end of the fourth contact block 16 and the top end of the fifth contact block 17. Then, the second threshold clamping assembly cooperates with the first threshold clamping assembly to quickly limit and clamp the automobile threshold body 3. By setting up the second plug-in block 19, the second plug-in block 19 is inserted into the bottom end of the automobile threshold body 3, so that the automobile threshold body 3 can be accurately positioned.

[0039] The top of the automobile door sill body 3 is connected to the third door sill clamping assembly, the fourth door sill clamping assembly and the fifth door sill clamping assembly, and the third door sill clamping assembly, the fourth door sill clamping assembly and the fifth door sill clamping assembly are located between the first door sill clamping assembly and the second door sill clamping assembly. The third door sill clamping assembly includes a third connecting frame 20, a sixth interference block 21, a seventh interference block 22 and a second clamping block 26. A third connecting frame 20 is provided on the side close to the first connecting frame 11. The seventh interference block 22 is fixedly connected to the lower front end of the third connecting frame 20, and the top of the third connecting frame 20 is fixedly connected to the sixth interference block 21. The bottom ends of the sixth interference block 21 and the seventh interference block 22 both interfere with the top outer wall of the automobile door sill body 3. The third connecting frame 20 The second clamping block 26 is fixedly connected to both sides of the bottom end, and one end of the second clamping block 26 respectively conflicts with the inner side wall corresponding to the automobile door sill body 3. The eighth conflicting block 23 is provided vertically below the seventh conflicting block 22, and the top of the eighth conflicting block 23 conflicts with the outer side wall of the automobile door sill body 3. The eighth conflicting block 23 is installed with a first clamping block 24 near the outer side wall of the automobile door sill body 3, and one end of the first clamping block 24 conflicts with the outer side wall of the automobile door sill body 3. The bottom end of the first clamping block 24 is fixedly connected to the top of the fixing bracket 25, and the fixing bracket 25 is fixedly connected to the top of the workbench 1 used for automobile door sill welding. The opposite side of the first clamping block 24 is provided with a third clamping block 27 that conflicts with the outer side wall of the automobile door sill body 3.

[0040] By setting up the third threshold clamping assembly, during use, the third connecting frame 20 makes an arc movement with the hinge axis of the connecting frame 10 and the output conversion member 9 until the bottom ends of the sixth contact block 21 and the seventh contact block 22 conflict with the top of the automobile threshold body 3 to be processed, and when the bottom ends of the sixth contact block 21 and the seventh contact block 22 conflict with the top of the automobile threshold body 3 to be processed, the second clamping block 26 will conflict with the inner side wall of the automobile threshold body 3, and the second clamping block 26 cooperates with the corresponding first clamping block 24 to achieve clamping limit.

[0041] The fourth threshold clamping assembly includes a fourth connecting frame 28, a connecting block 29, a fourth clamping block 30 and a tenth interference block 33. The fourth connecting frame 28 is provided on the side close to the third connecting frame 20. The bottom end of the fourth connecting frame 28 is fixedly connected to the fourth clamping block 30 through the connecting block 29. One end of the fourth clamping block 30 conflicts with the inner wall of the automobile threshold body 3. The bottom end of the fourth connecting frame 28 is fixedly connected to the tenth interference block 33, and the bottom end of the tenth interference block 33 conflicts with the top of the automobile threshold body 3. A fifth clamping block 31 that conflicts with the outer side wall of the automobile threshold body 3 is provided on one side of the fourth clamping block 30. The fifth clamping block 31 is fixedly connected to the side wall of the fixed block, and the top of the fixed block is fixedly connected to the ninth interference block 32. The top of the ninth interference block 32 conflicts with the outer side wall of the automobile threshold body 3.

[0042] By setting up the fourth door sill clamping assembly, during use, when it is necessary to clamp and limit the automobile door sill body 3, the fourth connecting frame 28 is used to make an arc movement with the hinge axis of the connecting frame 10 and the output conversion member 9, and then the fourth clamping block 30 is used to conflict with the inner side wall of the automobile door sill body 3, and the fourth clamping block 30 is used to cooperate with the fifth clamping block 31 to limit and fix the automobile door sill body 3. At the same time, the tenth conflicting block 33 is used to conflict with the top end of the automobile door sill body 3, and the top end of the ninth conflicting block 32 is used to conflict with the corresponding outer side wall of the automobile door sill body 3, so that the automobile door sill body 3 can be firmly limited and fixed.

[0043] The fifth door sill clamping assembly includes a fifth connecting frame 34 and a sixth clamping block 35. The fifth connecting frame 34 is provided on the side close to the fourth connecting frame 28. The sixth clamping blocks 35 are symmetrically fixedly connected to both sides of the bottom end of the fifth connecting frame 34, and one end of the sixth clamping block 35 is in conflict with the inner wall of the automobile door sill body 3. The corresponding side of the sixth clamping block 35 is provided with a seventh clamping block 36 that is in conflict with the outer wall of the automobile door sill body 3.

[0044] By providing the fifth door sill clamping assembly, when the fifth connecting frame 34 makes an arc motion with the hinge axis of the connecting frame 10 and the output conversion member 9, the sixth clamping block 35 comes into contact with the inner wall of the automobile door sill body 3, and then the sixth clamping block 35 cooperates with the seventh clamping block 36 to make it come into contact with the inner and outer walls of the automobile door sill body 3, thereby stably clamping the automobile door sill body 3.

[0045] One end of the first connecting frame 11, the second connecting frame 15, the third connecting frame 20, the fourth connecting frame 28 and the fifth connecting frame 34 is fixedly connected to the connecting frame 10, the connecting frame 10 is connected to the output end of the output conversion member 9, and the bottom end of the output conversion member 9 is fixedly connected to the second cylinder 8.

[0046] The output operation is performed by the second cylinder 8, so that the second cylinder 8 outputs the vertical potential energy of the second cylinder 8 through the output conversion component 9, and drives the first connecting frame 11, the second connecting frame 15, the third connecting frame 20, the fourth connecting frame 28 and the fifth connecting frame 34 to perform circular motion through the output conversion component 9.

[0047] An electric push rod 37 is fixedly connected to the top of the workbench 1 for welding the automobile door sill, and a plurality of laser alignment sensors 38 are installed on the top of the workbench 1 for welding the automobile door sill via a mounting plate.

[0048] By providing the laser alignment sensor 38 , the laser alignment sensor 38 can be used to limit the position of the vehicle door sill body 3 and then perform alignment monitoring, thereby ensuring the accuracy of the vehicle door sill body 3 after the position is limited.

[0049] The specific usage process of this embodiment is:

[0050] First, when welding the car door sill body 3 that needs to be welded, the lifting and resisting components arranged on both sides of the top of the workbench 1 used for the car door sill welding work are operated, so that the first cylinder 5 drives the first resisting block 4 to move vertically upward, so that the car door sill body 3 can be limited and fixed, and deviation is not avoided. When the first resisting block 4 moves and interferes with the car door sill body 3, the first plug-in block 7 will penetrate the through hole arranged at the bottom of the car door sill body 3, and the car door sill body 3 is accurately positioned;

[0051] Secondly, the second cylinder 8 outputs the vertical potential energy of the second cylinder 8 through the output conversion member 9, and drives the first connecting frame 11, the second connecting frame 15, the third connecting frame 20, the fourth connecting frame 28 and the fifth connecting frame 34 to perform circular motion through the output conversion member 9, so that the first connecting frame 11 is moved in an arc shape until the second contact block 12 contacts both sides of the top of one side of the automobile door sill body 3, so that the second contact block 12 and the third contact block 13 form a clamping structure to clamp and limit one side of the automobile door sill body 3, and then cooperate with each other to limit the automobile door sill body 3. The fourth contact block 16 contacts the top of one side of the automobile door sill body 3 on both sides, so that the bottom end of the fourth contact block 16 and the top end of the fifth contact block 17 can cooperate with each other to limit and clamp the automobile door sill body 3, thereby making the second door sill clamping assembly cooperate with the first door sill clamping assembly to quickly limit and clamp the automobile door sill body 3, and through the second plug-in block 19 provided, the second plug-in block 19 is inserted into the bottom end of the automobile door sill body 3, thereby accurately positioning the automobile door sill body 3;

[0052] Afterwards, the third connecting frame 20 performs a circular motion until the bottom ends of the sixth and seventh contact blocks 21 and 22 conflict with the top of the automobile door sill body 3 to be processed, and when the bottom ends of the sixth and seventh contact blocks 21 and 22 conflict with the top of the automobile door sill body 3 to be processed, the second clamping block 26 will conflict with the inner side wall of the automobile door sill body 3, and the second clamping block 26 cooperates with the corresponding first clamping block 24 to achieve clamping limit, and the fourth connecting frame 28 performs an arc motion, and then through the fourth clamping block 30 and the inner side wall of the automobile door sill body 3 The fourth clamping block 30 cooperates with the fifth clamping block 31 to limit and fix the automobile door sill body 3. At the same time, the tenth interference block 33 is in conflict with the top of the automobile door sill body 3, and the top of the ninth interference block 32 is in conflict with the corresponding outer side wall of the automobile door sill body 3. At the same time, after the fifth connecting frame 34 moves in an arc, the sixth clamping block 35 is in conflict with the inner side wall of the automobile door sill body 3. Then, the sixth clamping block 35 cooperates with the seventh clamping block 36 to make it conflict with the inner and outer side walls of the automobile door sill body 3, thereby stably clamping the automobile door sill body 3.

[0053] Finally, by setting the laser alignment sensor 38, the laser alignment sensor 38 can be used to monitor the position of the automobile threshold body 3 after limiting the position, thereby ensuring the accuracy of the automobile threshold body 3 after limiting the position. In this way, a limit assembly for automobile threshold welding is completed.

[0054] It should be noted that the present invention is a limit assembly used for welding automobile door sills. The components are all universal standard parts or components known to those skilled in the art. The structure and principle thereof can be known to those skilled in the art through technical manuals or conventional experimental methods. In the idle part of the device, all the above-mentioned electrical components, which refer to power elements, electrical components, and adapted monitoring computers and power supplies, are connected through wires. The specific connection means should refer to the above-mentioned working principle, and the electrical connection is completed in the order of working in sequence. The detailed connection means are well-known technologies in this field.

[0055] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A limit assembly for automobile threshold welding, comprising a workbench (1) for automobile threshold welding, characterized in that: A control panel (2) is installed at the top of the workbench (1) for automobile threshold welding, and an automobile threshold body (3) is provided at the top of the workbench (1) for automobile threshold welding. Two sets of lifting and abutting assemblies are provided inside the top of the automobile threshold body (3). Five output conversion members (9) are provided at the top of the workbench (1) for automobile threshold welding, and the output ends of the output conversion members (9) are all connected to the output ends of the second cylinder (8). The outer side walls of the output conversion members (9) are hinged with connecting frames (10), and the connecting frames (10) are sequentially installed with a first threshold clamping assembly, a second threshold clamping assembly, a third threshold clamping assembly, a fourth threshold clamping assembly and a fifth threshold clamping assembly from left to right. An electric push rod (37) is installed at the top of the workbench (1) for automobile threshold welding, and a plurality of laser alignment sensors (38) are installed at the top of the workbench (1) for automobile threshold welding via a mounting plate.

2. The limiting assembly for automobile door sill welding according to claim 1 is characterized in that: The lifting resistance assembly comprises a first resistance block (4), a first cylinder (5), a first connecting block (6) and a first plug-in block (7); the bottom end of the automobile door sill body (3) is in resistance with the top end of the first resistance block (4), and the bottom end of the first resistance block (4) is connected to the output end of the first cylinder (5); the outer side wall of the first resistance block (4) is installed with the first connecting block (6) through an angle iron, and the top end of the first connecting block (6) is penetrated and installed with the first plug-in block (7).

3. The limiting assembly for automobile door sill welding according to claim 1 is characterized in that: The first threshold clamping assembly comprises a first connecting frame (11) and a second resistance block (12); the first connecting frame (11) is installed on one end of the connecting frame (10) on the left side, and the second resistance block (12) is symmetrically installed at the bottom end of the first connecting frame (11); the bottom end of the second resistance block (12) is in contact with the top end of the automobile threshold body (3); and a third resistance block (13) is provided vertically below the second resistance block (12) and in contact with the outer wall of the automobile threshold body (3); the third resistance block (13) is symmetrically installed on both sides of the first mounting frame (14), and the first mounting frame (14) is installed at the top end of the workbench (1) used for automobile threshold welding.

4. The limiting assembly for automobile door sill welding according to claim 1 is characterized in that: The second threshold clamping assembly includes a second connecting frame (15) and a fourth resistance block (16), one end of the right connecting frame (10) is mounted with the second connecting frame (15), the bottom end of the second connecting frame (15) is symmetrically mounted with the fourth resistance block (16), the bottom end of the fourth resistance block (16) is in contact with the top end of the automobile threshold body (3), and a fifth resistance block (17) is provided vertically below the fourth resistance block (16) and is in contact with the outer side wall of the automobile threshold body (3), and the fifth resistance block (17) is symmetrically mounted on the outer side walls of the second mounting frame (18).

5. The limiting assembly for automobile door sill welding according to claim 4 is characterized in that: The outer side walls of the second mounting frame (18) and the first mounting frame (14) are both mounted with second plug-in blocks (19) via angle irons, and the second plug-in blocks (19) are plugged into the interior of the bottom end of the vehicle door sill body (3).

6. The limiting assembly for automobile door sill welding according to claim 3 is characterized in that: The third threshold clamping assembly includes a third connecting frame (20), a sixth interference block (21), a seventh interference block (22) and a second clamping block (26), wherein the third connecting frame (20) is installed at the front end of the connecting frame (10) on the side close to the first connecting frame (11), the seventh interference block (22) is installed below the front end of the third connecting frame (20), and the sixth interference block (21) is installed at the top end of the third connecting frame (20), the bottom ends of the sixth interference block (21) and the seventh interference block (22) are in conflict with the top end of the automobile threshold body (3), and the second clamping block (26) is installed on both sides of the bottom end of the third connecting frame (20), and one end of the second clamping block (26) is in conflict with the corresponding inner wall of the automobile threshold body (3).

7. The limiting assembly for automobile door sill welding according to claim 6, characterized in that: An eighth conflicting block (23) is provided vertically below the seventh conflicting block (22) and conflicts with the outer side wall of the automobile threshold body (3); a first clamping block (24) is installed near the outer side wall of the automobile threshold body (3) on the eighth conflicting block (23); one end of the first clamping block (24) conflicts with the outer side wall of the automobile threshold body (3); the bottom end of the first clamping block (24) is connected to the top of a fixing frame (25) installed on the top of a workbench (1) for welding automobile thresholds; and a third clamping block (27) is provided on the opposite side of the first clamping block (24) and conflicts with the outer side wall of the automobile threshold body (3).

8. The limiting assembly for automobile door sill welding according to claim 6, characterized in that: The fourth threshold clamping assembly includes a fourth connecting frame (28), a connecting block (29), a fourth clamping block (30) and a tenth contact block (33), wherein the fourth connecting frame (28) is installed at the front end of the connecting frame (10) on the side close to the third connecting frame (20), the fourth clamping block (30) is installed at the bottom end of the fourth connecting frame (28) through the connecting block (29), one end of the fourth clamping block (30) contacts the inner side wall of the automobile threshold body (3), and the tenth contact block (33) is installed at the bottom end of the fourth connecting frame (28) to contact the top end of the automobile threshold body (3).

9. The limiting assembly for automobile door sill welding according to claim 8, characterized in that: A fifth clamping block (31) is provided on one side of the fourth clamping block (30) and contacts the outer side wall of the vehicle door sill body (3). The fifth clamping block (31) is mounted on the side wall of the fixed block, and a ninth contact block (32) is mounted on the top of the fixed block. The top of the ninth contact block (32) contacts the outer side wall of the vehicle door sill body (3).

10. The limiting assembly for automobile door sill welding according to claim 8, characterized in that: The fifth door sill clamping assembly includes a fifth connecting frame (34) and a sixth clamping block (35), wherein the fifth connecting frame (34) is installed at the front end of the connecting frame (10) on the side close to the fourth connecting frame (28), and the sixth clamping blocks (35) are symmetrically installed on both sides of the bottom end of the fifth connecting frame (34), and one end of the sixth clamping block (35) is in conflict with the inner wall of the automobile door sill body (3), and the corresponding side of the sixth clamping block (35) is provided with a seventh clamping block (36) in conflict with the outer wall of the automobile door sill body (3).

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