Forklift carriage rivet welding tool

Abstract

The invention relates to the technical field of forklift carriage welding, in particular to a forklift carriage rivet welding tool which comprises a positioning workbench, a hoisting plate, an electric push rod and a driving plate, the hoisting plate is arranged over the positioning workbench, and the electric push rod is arranged at the top of the hoisting plate; the output end of the electric push rod penetrates through the hoisting plate and is connected with the driving plate, a first through hole is formed in the driving plate, the connecting rod coaxially penetrates through the first through hole, and the annular welding assembly is arranged on the connecting rod. The moving path of the driving plate in the vertical direction is arranged in a segmented mode, so that automatic coaxial positioning and releasing of the three roller seats are achieved when the driving plate moves in the first section of path, and automatic synchronous ring welding of the three roller seats is achieved when the driving plate moves upwards in the second section of path. The overall welding efficiency is improved while the positioning precision of the roller seat is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of forklift slide welding, in particular to a forklift slide riveting and welding tool. Background Art

[0002] A forklift slide usually refers to a part of a forklift, which is mainly used to support cargo loading and unloading, stability, and lifting and sliding adjustment of the fork arm and forks during forklift operation. The forklift slide includes a fork frame plate, a column plate, a vertical plate, a rib plate, and a roller seat. Among them, the surface of the column plate is provided with slots for lifting and handling and installing the roller seat, and the roller seat and the column plate are usually connected by riveting to ensure the connection strength between the roller seat and the column plate.

[0003] The working principle of riveting welding is to connect the two objects to be welded together through the penetration of welding rods. In the prior art, when welding the roller seat, it is necessary to ensure that the axis of the roller seat coincides with the axis of the slot hole on the surface of the column plate to ensure the stability of the forklift slide after the roller is installed. The conventional method is to weld manually by the staff. The problem caused by this is that the staff needs to constantly adjust the installation position of the roller seat before welding, and the precise positioning of the roller seat cannot be fully guaranteed, which affects the welding accuracy and the welding efficiency. In response to the above problems, there are better solutions in the prior art, such as the forklift fork frame welding production line with patent number CN111673302B, which inserts the roller seat into the position where welding is required on the column plate, pre-fixes the roller seat by spot welding, and then automatically performs full welding by a welding robot, thereby ensuring the welding efficiency of a single roller seat. However, the following problems still exist: since three roller seats need to be installed on each column plate, when batch welding operations are carried out in the factory, workers are required to position and spot weld the three roller seats on each column plate before welding. The positioning process of each roller seat requires workers to make judgments based on their work experience, and the accurate positioning of the roller seat cannot be fully guaranteed, which limits the overall welding efficiency of the three roller seats and the column plate.

[0004] Therefore, in order to solve the problem that manual positioning by workers cannot ensure positioning accuracy and limits the overall welding efficiency, a forklift slide riveting welding tool is proposed. Summary of the invention

[0005] The purpose of the present invention is to provide a forklift slide riveting welding tool, which solves the problem that the workers manually position the three roller seats separately, cannot fully guarantee the accurate positioning of each roller seat and limits the overall welding efficiency. By setting the moving path of the drive plate in the vertical direction in sections, the drive plate can realize automatic coaxial positioning and release of the three roller seats when moving in the first section of the path, and realize automatic synchronous ring welding of the three roller seats when moving up in the second section of the path, thereby ensuring the positioning accuracy of the roller seats while improving the overall welding efficiency.

[0006] To achieve the above object, the present invention provides the following technical solutions: A forklift slide riveting welding tool comprises a positioning workbench, a hoisting plate, an electric push rod and a driving plate, wherein the hoisting plate is arranged directly above the positioning workbench, the electric push rod is arranged on the top of the hoisting plate, the output end of the electric push rod passes through the hoisting plate and is connected to the driving plate, and further comprises a connecting rod, a ring welding assembly, a mounting plate, a positioning assembly and a positioning block, a through hole 1 is opened inside the driving plate, the connecting rod is coaxially penetrated inside the through hole 1, the ring welding assembly is arranged on the connecting rod, the mounting plate is connected to the ring welding assembly, the positioning assembly is arranged on the connecting rod, the positioning block is connected to the positioning assembly, and the driving plate is connected to the electric push rod. The push rod drives the driving plate to move in the vertical direction, and the driving plate moving path includes two sections and the height of the first section is higher than that of the second section. When the driving plate moves in the first section, the ring welding assembly drives the mounting plate and the positioning block to move synchronously in the vertical direction. When the driving plate moves downward in the first section, the positioning assembly drives the positioning block to coaxially position the roller seat. When the driving plate moves downward in the second section, the height of the mounting plate and the positioning block remains unchanged and the ring welding assembly drives the mounting plate to rotate forward relative to the positioning block. When the driving plate moves upward in the second section, the height of the mounting plate and the positioning block remains unchanged and the ring welding assembly drives the mounting plate to reverse relative to the positioning block and perform ring welding operations.

[0007] By adopting the above scheme and utilizing the set positioning assembly, the roller seat can be quickly and accurately positioned. By utilizing the set ring welding assembly, the mounting plate can be driven to rotate in the forward and reverse directions respectively during the process of the driving plate moving down and up, thereby avoiding the situation where the automatic welding head installed on the mounting plate for welding has wire entanglement. At the same time, the automatic welding head can rotate around the roller seat at a fixed track during the welding process, thereby achieving simultaneous welding of the three roller seats without the need for spot welding of the three roller seats, thereby ensuring precise positioning while also ensuring welding efficiency.

[0008] Preferably, the ring welding assembly includes sleeve one, sleeve two, an annular plate, a telescopic rod and a shift rod, a through hole two is opened inside the lifting plate, the sleeve one is penetrated inside the through hole one and the through hole two, and is rotatably sleeved with the connecting rod, the sleeve two is arranged below the sleeve one, the annular plate is rotatably sleeved with the outer wall of the sleeve two, the fixed end of the telescopic rod is connected to the annular plate, the movable end of the telescopic rod is arranged in an "L" shape, and the upper end is connected to the sleeve one, a plurality of telescopic rods are arranged in a circular array, the mounting plate is arranged on the side wall of the annular plate, the four positioning blocks are arranged in a circular array at the bottom of the sleeve two, a driving groove is opened on the outer wall of the sleeve one, the left end of the shift rod is connected to the inner wall of the through hole two, and the right end of the shift rod is slidably arranged in the driving groove.

[0009] By adopting the above scheme, the automatic welding head can be installed on the surface of the mounting plate, and the annular plate is used to drive the mounting plate to rotate in the opposite direction during the upward movement of the driving plate, so that the automatic welding head revolves around the roller seat in the opposite direction. In the process that the mounting plate follows the annular plate to rotate in the opposite direction, the automatic welding head is driven to weld the roller seat and the column plate with a fixed trajectory, thereby realizing full welding of the roller seat. There is no need to spot weld the roller seat first and then full weld it, and during the welding process, the four positioning blocks are still clamped on the top of the roller seat, and the position of the roller seat will not be offset during welding.

[0010] Preferably, the positioning assembly includes a disc, a sleeve, a connecting piece and a spring, the disc is arranged at the lower end of the connecting rod, the upper end of the sleeve is fixedly sleeved with the disc, the connecting piece is passed through the interior of the sleeve, and the lower end is fixedly connected to the positioning block, the spring is sleeved with the sleeve and the connecting piece, the two ends of the spring are respectively connected to the positioning block and the disc, and the bottom of the positioning block is inclined.

[0011] It can be seen that there are many devices for positioning and installing the roller seat, including but not limited to the three-jaw chuck. Considering that three roller seats need to be welded on the surface of the column plate, and the welding process of each roller seat requires two operations of installation and disassembly through the three-jaw chuck, the positioning and installation process of the three roller seats is relatively cumbersome, so this solution is adopted. After the three roller seats are placed inside the corresponding slots on the surface of the column plate, the driving plate is moved downward so that the bottoms of the three groups of positioning blocks squeeze the tops of the corresponding roller seats respectively. Under the inclined setting condition of the bottom of the positioning block, the squeezed roller seat will move toward the middle of the four positioning blocks of each group, so that the roller seat can be automatically and coaxially positioned precisely at the welding point without the need to disassemble and assemble the roller seat.

[0012] Preferably, the connecting piece is an exhaust pipe, the upper end of the connecting piece is sleeved with a piston and a one-way valve, the piston is sleeved on the inner wall of the sleeve, the positioning block and the connecting rod are both hollow, the positioning block is connected to the interior of the connecting piece, an exhaust hole is provided at the bottom of the positioning block, the upper end of the sleeve is provided with a conduit one, the upper end of the conduit one passes through the interior of the connecting rod, the upper end of the connecting rod is penetrated and connected with a one-way valve two, and the upper end of the one-way valve two is connected with a conduit two.

[0013] It can be seen that there are many ways to eliminate the influence of smoke during the welding process, including but not limited to using an exhaust pipe to extract. Since three roller seats need to be welded on the column plate, and there is a certain distance between the three roller seats, if the three roller seats are welded in sequence, it is necessary to constantly adjust the position of the exhaust pipe, and the process is relatively cumbersome. If the three roller seats are welded at the same time, a large negative pressure needs to be formed inside the exhaust pipe. In the process of extracting smoke, the flow rate of the airflow at the welding point position will be accelerated, resulting in pores at the weld position, which in turn affects the welding quality. Therefore, this solution is adopted. When the mounting plate drives the automatic welding head installed on its surface to rotate, due to the elastic force of the spring, the positioning block always remains in a clamping state with the top of the roller seat. In the process of the sleeve moving upward, the piston has two tendencies: fixed and moving upward. When the piston is fixed, the exhaust hole can slowly extract the smoke generated during the welding process into the sleeve for storage, eliminating the influence of the smoke while avoiding the excessive flow rate of the airflow on the weld surface, thereby avoiding the formation of pores at the weld position, effectively ensuring the welding effect.

[0014] Preferably, the vertical height of the driving groove is less than or equal to the movable length of the connecting piece in the sleeve, and a sliding groove is provided on the outer wall of the sleeve, and the upper end of the sliding groove is smoothly connected to the lower end of the driving groove.

[0015] By adopting the above scheme, during the downward movement of the sleeve 1, it is possible to avoid limiting its rotation angle due to the small height of the driving groove. It is also possible to avoid the sleeve 1 from rotating before the positioning block contacts or separates from the roller seat, thereby ensuring that the position of the automatic welding head fixedly mounted on the mounting plate remains unchanged before and after welding the roller seat.

[0016] Preferably, the interior of the positioning workbench is hollow, the second conduit is a rubber tube, the lower end of the second conduit passes through the interior of the positioning workbench, and an exhaust pipe is provided on the side wall of the positioning workbench.

[0017] By adopting the above scheme, during the upward movement of the disc, the smoke pumped into the interior of the connecting rod through the exhaust hole can be pushed into the interior of the positioning workbench by the piston when the disc moves downward, and discharged from the exhaust pipe, and the heat in the smoke can heat the positioning workbench, so that the surface of the positioning workbench maintains a relatively stable temperature, reducing the impact of thermal imbalance caused by the large temperature difference before and after welding, and effectively ensuring the welding quality of the roller seat and the column plate.

[0018] Preferably, the slide groove is arranged at the bottom of the driving groove, and when the positioning block is located at the top, the distance between the positioning block and the top edge of the roller seat is equal to the length of the slide groove, and the driving groove is a spiral groove.

[0019] By adopting the above scheme, when the driving plate continues to move downward, the lever can enter the interior of the driving groove. Since the driving groove is a spiral groove, the sleeve can be driven to rotate during the process of the driving plate continuing to move downward, and then the annular plate can be smoothly driven to drive the mounting plate to rotate, so that the automatic welding head installed on the mounting plate can rotate around the roller seat, achieving the effect that the automatic welding head can rotate along a fixed track, effectively ensuring the welding quality.

[0020] Preferably, the number of spiral turns of the driving groove is one turn.

[0021] By adopting the above scheme, when the four positioning blocks are engaged with the top of the roller seat and the disc continues to move downward, the lever is driven in the positive direction inside the driving groove to drive the mounting plate to rotate one circle forward, and when the disc moves to the bottom and then moves upward, the lever is driven in the reverse direction inside the driving groove to drive the mounting plate to rotate one circle reversely, thereby enabling the automatic welding head installed on the mounting plate to rotate forward and reversely one circle respectively during the process of the driving plate moving downward and upward, so that the roller seat and the column plate can be fully welded when the roller seat is stably engaged.

[0022] Compared with the prior art, the present invention has the following beneficial effects: 1. Through the set slide groove and sleeve 2, when the driving plate moves down in the first section of the path, it can drive the positioning block to move down and squeeze the roller seat, so as to realize the automatic synchronous coaxial positioning of the three roller seats. There is no need for the staff to manually adjust the position of the roller seat, which effectively ensures the positioning accuracy of the roller seat and does not need to position the three roller seats one by one, thereby effectively improving the overall welding operation efficiency.

[0023] 2. Through the arranged lever and driving groove, when the driving plate moves down in the second path, the height of the mounting plate and the positioning block can be ensured to remain unchanged, and the mounting plate rotates one circle relative to the positioning block; when the driving plate moves up in the second path, the height of the mounting plate and the positioning block can be ensured to remain unchanged, and the mounting plate is reset by one circle relative to the positioning block, and the automatic welding head installed on the mounting plate can be driven to rotate around the corresponding roller seat during the resetting process of the mounting plate, thereby realizing automatic synchronous ring welding operation of the three roller seats, without the need to spot weld the three roller seats one by one, reducing the work intensity of the staff while further improving the efficiency of the overall welding operation.

[0024] 3. By setting up the second sleeve, the four positioning blocks can be set at the same height under the connection between the four positioning blocks and the second sleeve, avoiding the situation where the height position of a positioning block is offset during the clamping process of the four positioning blocks to the roller seat, and further ensuring the accurate positioning of the roller seat during the welding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 For the present invention Figure 1 Rear view of Figure 3 For the present invention Figure 1 The state diagram when the middle positioning block moves down to contact with the roller seat; Figure 4 For the present invention Figure 3 Rear view of Figure 5 For the present invention Figure 1 A schematic diagram of the partial cross-sectional connection structure of the middle lifting plate, the driving plate and the ring welding assembly; Figure 6 For the present invention Figure 1 Schematic diagram of the connection structure between the middle connecting rod, the positioning assembly and the positioning block; Figure 7 For the present invention Figure 6 A schematic diagram of the partial cross-sectional connection structure of the middle sleeve, the connecting piece and the positioning block; Figure 8 For the present invention Figure 2 An enlarged view of the local A in the middle; Fig. 9 For the present invention Figure 4 Enlarged view of part B in the figure.

[0026] In the figure: 1. positioning workbench; 11. exhaust pipe; 2. lifting plate; 21. through hole 2; 3. electric push rod; 4. drive plate; 41. through hole 1; 5. connecting rod; 51. one-way valve 2; 52. conduit 2; 6. ring welding assembly; 61. sleeve 1; 611. drive groove; 612. slide groove; 62. sleeve 2; 63. annular plate; 64. telescopic rod; 65. lever; 7. mounting plate; 8. positioning assembly; 81. disc; 82. sleeve; 821. conduit 1; 83. connecting piece; 831. piston; 832. one-way valve 1; 84. spring; 9. positioning block; 91. exhaust hole; a. column plate; b. roller seat. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figures 1 to 9 The present invention provides a forklift slide riveting welding tool, and the technical solution is as follows: Specifically, refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 A forklift slide riveting welding tool comprises a positioning workbench 1, a hoisting plate 2, an electric push rod 3 and a driving plate 4. The hoisting plate 2 is arranged directly above the positioning workbench 1, the electric push rod 3 is arranged on the top of the hoisting plate 2, the output end of the electric push rod 3 passes through the hoisting plate 2 and is connected to the driving plate 4, and further comprises a connecting rod 5, a ring welding assembly 6, a mounting plate 7, a positioning assembly 8 and a positioning block 9. A through hole 41 is opened inside the driving plate 4, and the connecting rod 5 is coaxially penetrated inside the through hole 41; In order to realize the automatic welding between the roller seat b and the column plate a, refer to Figure 2 , Figure 4 and Figure 5, the ring welding assembly 6 is arranged on the connecting rod 5, the mounting plate 7 is connected to the ring welding assembly 6, the ring welding assembly 6 includes a sleeve 1 61, a sleeve 2 62, an annular plate 63, a telescopic rod 64 and a lever 65, the interior of the hanging plate 2 is provided with a through hole 21, the sleeve 1 61 is penetrated in the interior of the through hole 1 41 and the through hole 21, and is rotatably sleeved with the connecting rod 5, wherein the sleeve 1 61 is rotatably sleeved with the through hole 1 41, the sleeve 2 62 is arranged below the sleeve 1 61, the annular plate 63 is rotatably sleeved with the outer wall of the sleeve 2 62, the fixed end of the telescopic rod 64 is rotatably sleeved with the annular plate 63 The movable end of the telescopic rod 64 is set to an "L" shape, and the upper end is connected to the sleeve 1 61. A plurality of telescopic rods 64 are arranged in a circular array. The mounting plate 7 is arranged on the side wall of the annular plate 63. Four positioning blocks 9 are arranged in a circular array at the bottom of the sleeve 2 62. A driving groove 611 is provided on the outer wall of the sleeve 1 61. The left end of the lever 65 is connected to the inner wall of the through hole 21. The right end of the lever 65 is slidably arranged inside the driving groove 611. A sliding groove 612 is provided on the outer wall of the sleeve 1 61. The upper end of the sliding groove 612 is smoothly connected to the lower end of the driving groove 611.

[0029] Before welding, the column plate a is placed on the positioning workbench 1 for positioning, and then the three roller seats b to be welded are respectively inserted into the slots on the surface of the column plate a, and the electric push rod 3 is started. The output end of the electric push rod 3 drives the driving plate 4 to move downward. Since the sleeve 1 61 is rotatably sleeved with the through hole 1 41, and the connecting rod 5 is rotatably sleeved inside the sleeve 1 61, when the driving plate 4 moves downward, the sleeve 2 62 and the annular plate 63 can move downward under the action of their own gravity. Since the positioning block 9 is connected to the bottom of the sleeve 2 62, when the downward movement of the positioning block 9 is blocked (at this time, the driving plate 4 is at the end of the first path), the positioning block 9 is blocked. At the bottom, the right end of the lever 65 enters the interior of the driving groove 611. As the driving plate 4 continues to move downward, the lever 65 can use the driving groove 611 to drive the sleeve 61 to rotate. Since the annular plate 63 is connected to the sleeve 61 through the telescopic rod 64, the annular plate 63 can be driven to rotate during the rotation of the sleeve 61. The mounting plate 7 for mounting the automatic welding head is arranged on the annular plate 63, so the automatic welding head can be driven to revolve around the roller seat b, thereby ensuring the fixation of the welding trajectory, achieving the simultaneous automatic ring welding operation of the three roller seats b, improving the overall welding efficiency while ensuring the welding quality.

[0030] As an embodiment of the present invention, in order to realize the automatic coaxial positioning of the three roller seats b and simplify the positioning process, refer to Figure 6 and Figure 7The positioning assembly 8 is arranged on the connecting rod 5, four positioning blocks 9 are arranged and connected to the positioning assembly 8, the positioning assembly 8 includes a disc 81, a sleeve 82, a connecting piece 83 and a spring 84, the disc 81 is arranged at the lower end of the connecting rod 5, the upper end of the sleeve 82 is fixedly sleeved with the disc 81, the connecting piece 83 is passed through the interior of the sleeve 82, and the lower end is fixedly connected with the positioning block 9, the spring 84 is sleeved with the sleeve 82 and the connecting piece 83, the two ends of the spring 84 are respectively connected to the positioning block 9 and the disc 81, and the bottom of the positioning block 9 is inclined.

[0031] Since the bottom of the positioning block 9 is inclined, when the positioning block 9 moves down to the bottom and contacts the roller seat b and continues to move down, the top of the roller seat b can be squeezed, so that the roller seat b can be moved to the position to be welded under the action of the four positioning blocks 9, thereby realizing automatic coaxial positioning of the roller seat b, and there is no need to clamp the roller seat b before positioning, and there is no need to disassemble the roller seat b after positioning, and when the driving plate 4 moves up after positioning (that is, when the driving plate 4 moves up in the second path), the sliding connection between the lever 65 and the driving groove 611 can be utilized to drive the sleeve 61 to rotate in the opposite direction, thereby driving the automatic welding head installed on the mounting plate 7 to rotate in the opposite direction with a fixed trajectory, without the need to perform spot welding operation on the roller seat b, and automatic full welding of the roller seat b can be realized during the rotation of the mounting plate 7, effectively ensuring the welding efficiency while ensuring the positioning accuracy.

[0032] As an embodiment of the present invention, in order to avoid the occurrence of pores in the weld due to the high air flow velocity at the weld position when extracting the smoke generated during welding, refer to Figure 6 and Figure 7 The connecting piece 83 is an exhaust pipe, and the upper end of the connecting piece 83 is sleeved with a piston 831 and a one-way valve 832. The piston 831 is sleeved on the inner wall of the sleeve 82. The positioning block 9 and the connecting rod 5 are both hollow. The positioning block 9 is connected to the interior of the connecting piece 83. The bottom of the positioning block 9 is provided with an exhaust hole 91. The upper end of the sleeve 82 is provided with a conduit 821. The upper end of the conduit 821 passes through the interior of the connecting rod 5. The upper end of the connecting rod 5 passes through and is connected with a one-way valve 51. The upper end of the one-way valve 51 is connected with a conduit 52.

[0033] After the four positioning blocks 9 of each group are stably engaged with the corresponding roller seat b, the piston 831 on each connecting member 83 is located at the top of the corresponding sleeve 82. At this time, when the driving plate 4 moves upward (that is, when the driving plate 4 moves upward in the second path), the mounting plate 7 can be rotated in the opposite direction, and the automatic welding head is started when the driving plate 4 moves upward, thereby realizing automatic welding of the roller seat b. During the welding process, as the driving plate 4 continues to move upward (that is, as the driving plate 4 moves upward in the second path), the driving plate 4 can drive the connecting rod 5 to move upward through the connection with the sleeve 61. Since the disc 81 is arranged at the lower end of the connecting rod 5 and is sleeved with the sleeve 82, the sleeve 82 can be driven to move upward during the upward movement of the connecting rod 5. At this time, under the elastic force of the spring 84, the positioning block 9 still maintains a clamping state with the roller seat b, that is, the height position of the positioning block 9, the connecting piece 83 and the piston 831 does not change. As the sleeve 82 continues to rise, a negative pressure is formed inside the sleeve 82, so that the smoke generated during the welding process can be drawn into the internal storage of the sleeve 82, while eliminating the influence of the smoke, it can avoid the formation of pores due to the fast air flow speed at the weld position, thereby effectively ensuring the welding quality.

[0034] As an embodiment of the present invention, in order to enable the sleeve 61 to rotate a full circle in both the forward and reverse directions, so that the automatic welding head can complete a full circle of welding, refer to Figure 2 , Figure 4 and Figure 6 The vertical height of the driving groove 611 is less than or equal to the movable length of the connecting member 83 in the sleeve 82. The slide groove 612 is arranged at the bottom of the driving groove 611. When the positioning block 9 is located at the top, the distance from the top edge of the roller seat b is equal to the length of the slide groove 612. The driving groove 611 is a spiral groove, and the number of spiral turns of the driving groove 611 is one turn.

[0035] Under the length setting of the slide groove 612, the sleeve 61 can be prevented from rotating before the positioning block 9 moves down to contact the roller seat b. After the positioning block 9 contacts the roller seat b, when the driving plate 4 continues to move down, the right end of the lever 65 can enter the interior of the driving groove 611, and under the limit of the number of turns of the driving groove 611, the sleeve 61 can be driven to rotate a complete circle, thereby ensuring the complete welding of the periphery of the roller seat b by the automatic welding head.

[0036] As an embodiment of the present invention, in order to avoid the large temperature difference before and after welding affecting the welding effect, refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The interior of the positioning workbench 1 is hollow, the second conduit 52 is a rubber tube, the lower end of the second conduit 52 penetrates into the interior of the positioning workbench 1, and the side wall of the positioning workbench 1 is penetrated by an exhaust pipe 11.

[0037] When welding a new roller seat b, as the sleeve 82 moves downward, the smoke and hot air flow drawn into the sleeve 82 during the last welding process will enter the interior of the conduit 2 52 under the squeezing action of the piston 831, and enter the positioning workbench 1 after flowing inside the conduit 2 52. After entering the interior of the positioning workbench 1, the smoke can be discharged through the exhaust pipe 11, and the hot air flow can heat the positioning workbench 1, thereby reducing the impact of the large temperature difference before and after welding on the welding quality.

[0038] Working principle: In order to realize the automatic coaxial positioning of the three roller seats b, the four positioning blocks 9 are moved downward. Under the squeezing action of the four positioning blocks 9, the roller seat b can be moved to the center position of the four positioning blocks 9. Since the positioning workbench 1 can realize the automatic coaxial positioning of the column plate a, the automatic coaxial positioning of the roller seat b can be realized; in order to enable the automatic welding head installed on the mounting plate 7 to rotate and weld around the positioned roller seat b, the automatic welding head installed on the mounting plate 7 can be driven forward and reverse respectively during the downward and upward movement of the sleeve 61 through the provided lever 65 and the driving groove 611 provided on the outer wall of the sleeve 61. It rotates one circle in the direction of the positioning block 9, thereby realizing automatic welding of the positioned roller seat b and avoiding entanglement of the wires of the automatic welding head installed on the mounting plate 7; in order to reduce the influence of the flow rate of the airflow on the weld quality when extracting the smoke generated by welding, the piston 831, the one-way valve 832 and the one-way valve 51 are arranged, and the smoke can be slowly extracted by using the exhaust hole 91 opened at the bottom of the positioning block 9 during welding, thereby avoiding excessive airflow velocity at the weld position, and at the same time, the extracted hot air flow can be introduced into the interior of the positioning workbench 1, thereby realizing heating treatment of the positioning workbench 1 and reducing the influence of the temperature difference before and after welding on the welding quality.

[0039] Specific: Refer to Figure 1 and Figure 2 Before welding, the three roller seats b are placed in the corresponding slots on the column plate a respectively. In order to achieve accurate positioning of the roller seat b, the electric push rod 3 is started, and the electric push rod 3 drives the driving plate 4 to move downward. Since the sleeve 1 61 is rotatably sleeved with the driving plate 4 through the through hole 21, the driving plate 4 can drive the sleeve 1 61 to move downward during the downward movement, and the connecting rod 5 is rotatably sleeved inside the sleeve 1 61, and the positioning block 9 is connected to the connecting rod 5 through the positioning assembly 8. Therefore, the four positioning blocks 9 can be driven to move downward during the downward movement of the sleeve 1 61. When the four positioning blocks 9 are in contact with the top of the roller seat b, refer to Figure 3 , Figure 4 and Figure 8, the right end of the lever 65 moves from the slide groove 612 to the connection between the slide groove 612 and the driving groove 611. When the driving plate 4 continues to move downward, the lever 65 can drive the sleeve 1 61 to rotate forward one circle by shifting the driving groove 611. When the sleeve 82 moves to the bottom, the right end of the lever 65 is located at the uppermost end of the driving groove 611. When the sleeve 1 61 rotates forward, the sleeve 82 moves downward relative to the connecting member 83, and the air inside the sleeve 82 is discharged under the action of the piston 831, the one-way valve 1 832 and the one-way valve 2 51; After the roller seat b is positioned, in order to avoid the position of the positioning block 9 from shifting during the welding process, the electric push rod 3 is started, and the electric push rod 3 drives the driving plate 4 to move upward. At this time, the sleeve 61 can follow the driving plate 4 to move upward, and under the reverse shifting trend of the lever 65 to the driving groove 611, the automatic welding head installed on the mounting plate 7 can be driven to rotate in the opposite direction to the original position. During the reverse rotation of the sleeve 61, the connection between the telescopic rod 64 and the annular plate 63 can be used to drive the annular plate 63 to rotate in the opposite direction, so that the automatic welding head installed on the mounting plate 7 can be driven to rotate in the opposite direction, so as to achieve the effect of automatic welding of the roller seat b, and in the welding process, the height of the positioning block 9 can be fixed by the elastic force of the spring 84, so that the horizontal position of the positioning block 9 can be fixed, thereby avoiding the position of the positioning block 9 from shifting during the welding process, and further realizing the precise positioning of the roller seat b; In order to reduce the influence of excessive airflow velocity and the temperature difference before and after welding on the welding quality, after welding is completed, that is, after the automatic welding head installed on the mounting plate 7 rotates back to the original position, the right end of the lever 65 is located at the connection between the driving groove 611 and the slide groove 612. When the driving plate 4 continues to move upward, under the elastic force of the spring 84, the height position of the positioning block 9 remains unchanged. Therefore, the connecting rod 5 can drive the sleeve 82 to move upward under the action of the sleeve 61 and the driving plate 4. Under the action of the piston 831, the one-way valve 832 and the one-way valve 51, the exhaust hole 91 can be used to suck the smoke generated during the welding process, and the smoke and the heat in the smoke can be transported to the inside of the positioning workbench 1 when the new roller seat b is positioned next time, thereby reducing the influence of excessive airflow velocity and the temperature difference before and after welding on the welding quality, and effectively ensuring the welding quality.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A forklift slide riveting welding tool, comprising a positioning workbench (1), a hanging plate (2), an electric push rod (3) and a drive plate (4), characterized in that: The invention also comprises a connecting rod (5), a ring welding assembly (6), a mounting plate (7), a positioning assembly (8) and a positioning block (9); a through hole (41) is provided inside the driving plate (4); the connecting rod (5) is coaxially arranged inside the through hole (41); the ring welding assembly (6) is arranged on the connecting rod (5); the mounting plate (7) is connected to the ring welding assembly (6); the positioning assembly (8) is arranged on the connecting rod (5); the positioning block (9) is connected to the positioning assembly (8); the driving plate (4) is driven by the electric push rod (3) to move in the vertical direction; the moving path of the driving plate (4) comprises two sections and the height of the first section is higher than the second section; the driving plate (4) is driven by the electric push rod (3) to move in the vertical direction; the moving path of the driving plate (4) comprises two sections and the height of the first section is higher than the second section; When the plate (4) moves along the first path, the ring welding assembly (6) drives the mounting plate (7) and the positioning block (9) to move synchronously in the vertical direction; when the driving plate (4) moves downward along the first path, the positioning assembly (8) drives the positioning block (9) to coaxially position the roller seat (b); when the driving plate (4) moves downward along the second path, the height of the mounting plate (7) and the positioning block (9) remains unchanged and the ring welding assembly (6) drives the mounting plate (7) to rotate forward relative to the positioning block (9); when the driving plate (4) moves upward along the second path, the height of the mounting plate (7) and the positioning block (9) remains unchanged and the ring welding assembly (6) drives the mounting plate (7) to rotate reversely relative to the positioning block (9) and perform a ring welding operation.

2. A forklift slide riveting and welding tool according to claim 1, characterized in that: The ring welding assembly (6) comprises a sleeve 1 (61), a sleeve 2 (62), an annular plate (63), a telescopic rod (64) and a lever (65); a through hole 2 (21) is provided inside the hanging plate (2); the sleeve 1 (61) is inserted into the inside of the through hole 1 (41) and the through hole 2 (21) and is rotatably sleeved with the connecting rod (5); the sleeve 2 (62) is arranged below the sleeve 1 (61); the annular plate (63) is rotatably sleeved with the outer wall of the sleeve 2 (62); the fixed end of the telescopic rod (64) is rotatably sleeved with the annular plate (63); ), the movable end of the telescopic rod (64) is arranged in an "L" shape, and the upper end is connected to the sleeve one (61), a plurality of the telescopic rods (64) are arranged in a circular array, the mounting plate (7) is arranged on the side wall of the annular plate (63), four positioning blocks (9) are arranged in a circular array at the bottom of the sleeve two (62), the outer wall of the sleeve one (61) is provided with a driving groove (611), the left end of the lever (65) is connected to the inner wall of the through hole two (21), and the right end of the lever (65) is slidably arranged inside the driving groove (611).

3. A forklift slide riveting and welding tool according to claim 2, characterized in that: The positioning assembly (8) comprises a disc (81), a sleeve (82), a connecting piece (83) and a spring (84); the disc (81) is arranged at the lower end of the connecting rod (5); the upper end of the sleeve (82) is fixedly sleeved with the disc (81); the connecting piece (83) is inserted into the sleeve (82) and the lower end is fixedly connected to the positioning block (9); the spring (84) is sleeved with the sleeve (82) and the connecting piece (83); the two ends of the spring (84) are respectively connected to the positioning block (9) and the disc (81); and the bottom of the positioning block (9) is arranged obliquely.

4. A forklift slide riveting and welding tool according to claim 3, characterized in that: The connecting piece (83) is an air extraction pipe. The upper end of the connecting piece (83) is sleeved with a piston (831) and a one-way valve (832). The piston (831) is sleeved on the inner wall of the sleeve (82). The positioning block (9) and the connecting rod (5) are both hollow. The positioning block (9) is connected to the interior of the connecting piece (83). The bottom of the positioning block (9) is provided with an air extraction hole (91). The upper end of the sleeve (82) is provided with a conduit (821). The upper end of the conduit (821) passes through the interior of the connecting rod (5). The upper end of the connecting rod (5) passes through and is connected with a one-way valve (51). The upper end of the one-way valve (51) is connected with a conduit (52).

5. The forklift slide riveting and welding tool according to claim 4, characterized in that: The vertical height of the driving groove (611) is less than or equal to the movable length of the connecting member (83) in the sleeve (82), and a sliding groove (612) is provided on the outer wall of the sleeve (61), and the upper end of the sliding groove (612) is smoothly connected to the lower end of the driving groove (611).

6. The forklift slide riveting and welding tool according to claim 4, characterized in that: The interior of the positioning workbench (1) is hollow, the second conduit (52) is a rubber tube, the lower end of the second conduit (52) penetrates into the interior of the positioning workbench (1), and an exhaust pipe (11) is provided through the side wall of the positioning workbench (1).

7. The forklift slide riveting and welding tool according to claim 5, characterized in that: The slide groove (612) is arranged at the bottom of the driving groove (611); when the positioning block (9) is located at the top, the distance between the positioning block (9) and the top edge of the roller seat (b) is equal to the length of the slide groove (612); and the driving groove (611) is a spiral groove.

8. The forklift slide riveting and welding tool according to claim 7, characterized in that: The number of spiral turns of the driving groove (611) is one turn.

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