A welding workbench for easy cleaning of steel trusses

Abstract

This invention discloses a welding workbench for easy cleaning of steel trusses, relating to the technical field of welding workbenches for steel truss processing. The easy-to-clean welding workbench for steel trusses includes a workbench with a support base fixed to its top. A welding machine is mounted on the support base, and a positioning device is provided inside the support base. The positioning device includes a bidirectional threaded rod, a clamping sleeve, bolts, and a pressure plate. This easy-to-clean welding workbench for steel trusses, by incorporating a protective device, allows the brush to extend into a protective frame when the brush is reset after cleaning the top of the workbench. This protects the brush from being exposed when not in use, preventing the brush from being covered with a large amount of spattered welding slag, which would affect the subsequent cleaning effect and cause damage to the brush due to excessively high welding temperatures.

Description

Technical Field

[0001] This invention relates to the technical field of welding workbenches for steel truss processing, specifically a welding workbench for steel truss that is easy to clean. Background Technology

[0002] Steel trusses are important components commonly used in long-span bridge structures. They are formed by processing steel into truss structures, creating a beam structure with high strength and relatively light weight. Steel trusses are composed of many steel components (such as rods and nodes) connected by welding, bolting, or riveting. During the processing of steel trusses, the steel needs to be cut to ensure that it meets the design requirements and can withstand the structural loads and mechanical performance requirements. Welding operations are also required when processing steel trusses.

[0003] Patent publication number CN218835283U discloses a welding workbench for easy cleaning of metal materials. The workbench includes a tabletop, a support frame fixedly installed at the bottom, a vibration motor mounted on the top of the support frame, and a guide rail on one side of the tabletop. A first slider is slidably mounted on the guide rail. This application uses a first motor to drive a first screw to rotate, which in turn drives the first slider forward. This causes a cleaning brush mounted on the first slider to clean debris from the tabletop. If debris falls onto other items, the vibration motor at the bottom of the tabletop is activated, causing the items to vibrate and shake the debris off onto the tabletop. The cleaning brush then sweeps away the debris. After cleaning, the collection box can be removed and emptied. This eliminates the need for manual debris removal, as the vibration motor dislodges debris from other items, avoiding the waste of manpower and potential health risks associated with manual cleaning.

[0004] The aforementioned easy-to-clean welding workbench uses brushes that move along the surface of the workbench to remove debris. However, when the brushes are not in use, welding slag may splatter onto the brush surface during welding, potentially sticking to the brush and affecting its subsequent cleaning function. Furthermore, excessively high welding slag temperatures can damage the brushes. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a welding workbench for steel trusses that is easy to clean, thus solving the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a welding workbench for steel trusses that is easy to clean, comprising a workbench, a support base fixed to the top of the workbench, a welding machine mounted on the support base, and a positioning device on the inner side of the support base. The positioning device includes a bidirectional threaded rod, a clamping sleeve, a bolt, and a pressure plate. By rotating the bidirectional threaded rod, the clamping sleeves can be moved closer together, allowing them to clamp the workpiece in the left and right positions. By rotating the bolt, the pressure plate can be moved downwards to press the top of the workpiece. The bidirectional threaded rod is rotatably mounted on the inner side of the support base, and the outer wall of the bidirectional threaded rod is threadedly connected to the clamping sleeve, which is slidably mounted on the inner side of the support base. A bolt passes through the clamping sleeve and is threaded at the point of penetration. The bottom of the bolt is rotatably connected to the top of the pressure plate. The pressure plate is slidably installed inside the clamping sleeve. A motor is fixed to the side wall of the worktable. A screw is fixed to the output end of the motor. The screw is rotatably installed inside the worktable. A threaded sleeve is threaded to the outer wall of the screw. A protective frame is fixed to the side of the threaded sleeve away from the screw. A moving block passes through the side wall of the protective frame. A brush plate is slidably installed inside the moving block. A brush is fixed to the bottom of the brush plate. A protective device for protecting the brush is provided on the side of the protective frame away from the threaded sleeve. An auxiliary device for improving the brush cleaning efficiency is provided inside the protective frame. A cleaning device is provided on the protective frame.

[0007] The protective device includes a compression spring, a first magnetic block, a second magnetic block, a rack, a support block, a gear, a rotating rod, and a shovel plate; one side of the compression spring is fixed to the inside of the protective frame, and the other side of the compression spring is fixed to the top of the brush plate.

[0008] According to the above technical solution, the first magnetic block is fixed to the bottom of the moving block, the second magnetic block is fixed to the inside of the support base, and the rack is fixed to the inside of the support base. The bottom of the first magnetic block and the top of the second magnetic block are of the same pole. Therefore, when the first magnetic block moves to the top of the second magnetic block, the like poles repel each other, causing the moving block to move upward. This allows the moving block to drive the brush plate and brush upward, compressing the connecting spring and allowing the brush to extend into the protective frame.

[0009] According to the above technical solution, the support block is fixed to the bottom of the moving block, the rotating rod passes through the support block and is rotatably connected at the point of penetration, the gear is fixed to the outer wall of the rotating rod, and the shovel plate is fixed to the outer wall of the rotating rod. When the first magnetic block is removed from the top of the second magnetic block, the repulsive force disappears. With the cooperation of the connecting spring, the moving block can drive the brush to move out of the protective frame, so that the brush contacts the top of the workbench, thereby enabling cleaning operations. When the moving block moves downward, the gear can mesh with the rack, allowing the gear to move on the rack, thereby enabling the gear to drive the rotating rod and the shovel plate to rotate, so that the shovel plate can scrape up the welding slag adhering to the top surface of the workbench.

[0010] According to the above technical solution, the auxiliary device includes a protrusion, a transmission plate, a sloping groove, a return spring, a push plate, a connecting rod, a piston plate, an air storage chamber, and an air nozzle. The protrusion is fixed to the outer wall of the rotating rod, the transmission plate passes through the bottom of the moving block and is slidably connected at the penetration point, the sloping groove is opened at the bottom of the brush plate, and the outer wall of the top cylindrical rod of the moving block is in contact with the inner wall of the sloping groove. When the rotating rod rotates, it can drive the cam to rotate, thereby moving the transmission plate. With the cooperation of the return spring, the brush plate can move back and forth.

[0011] According to the above technical solution, one side of the reset spring is fixed to the inner side of the moving block, and the other side of the reset spring is fixed to the side wall of the brush plate. When the brush plate moves, it can push the push plate to move back and forth, thereby enabling the piston plate to move in the gas storage chamber through the connecting rod.

[0012] According to the above technical solution, the push plate is slidably installed on the inner wall of the protective frame, the side wall of the push plate is slidably connected to the side wall of the brush plate, the connecting rod is fixed on the side wall of the push plate, the air storage chamber is opened on the threaded sleeve, the connecting rod passes through the side wall of the threaded sleeve and is slidably connected at the penetration point, the piston plate is slidably installed on the inner wall of the air storage chamber, the end point of the connecting rod is fixedly connected to the side wall of the piston plate, and the air nozzle is fixed on the side wall of the threaded sleeve and communicates with the air storage chamber.

[0013] According to the above technical solution, the cleaning device includes an L-shaped block, a connecting spring, a striking block, a pushing spring, a bending rod, a fixing block, a long plate, an insert rod, and a return spring; the L-shaped block passes through the top of the protective frame and is slidably connected at the through point; one side of the connecting spring is fixed to the top of the protective frame, and the other side of the connecting spring is fixed to the inner side of the L-shaped block; the striking block is slidably installed on the top of the protective frame; one side of the pushing spring is fixed to the side wall of the bottom protrusion of the striking block, and the other side of the pushing spring is fixed to the side wall of the top protrusion of the protective frame.

[0014] According to the above technical solution, the fixing block is fixed to the outer wall of the protective frame, the bending rod passes through the striking block and is slidably connected at the point of penetration, the long plate is fixed to the end of the bending rod, the insert rod is fixed to the side wall of the long plate, one side of the return spring is fixed to the side wall of the striking block, and the other side of the return spring is fixed to the protruding end of the bending rod. When the piston plate moves back and forth, it will cause the push plate to press against the inclined surface at the bottom of the L-shaped block.

[0015] This invention provides a welding workbench for steel trusses that is easy to clean. It has the following advantages:

[0016] 1. This invention incorporates a protective device. When the brush finishes cleaning the top of the workbench and is reset, the cooperation of magnetic blocks one and two allows the brush to extend into the protective frame, protecting it and preventing it from being exposed when not in use. Exposed brush surfaces are prone to accumulating large amounts of splattered welding slag, affecting subsequent cleaning effectiveness and potentially damaging the brush due to excessively high welding temperatures. Furthermore, when the brush is cleaning, starting the motor moves the screw and threaded sleeve, causing magnetic block one to move away from the top of magnetic block two. A compression spring engages a gear and rack, causing the gear to rotate. The rotating rod and scraper plate work together to remove the cooled, solidified welding slag from the top of the workbench, solving the problem of welding slag adhering to the workbench top and hindering brush cleaning.

[0017] 2. This invention, through the installation of an auxiliary device, enables the rotating rod to drive the protrusion to press against the transmission plate when it rotates. Through the cooperation of the inclined groove and the return spring, the brush plate moves the brush back and forth, allowing the brush to move left and right as well as back and forth on the surface of the worktable. This results in multi-directional friction on the top of the worktable, solving the problem of stubborn debris sticking to the worktable surface and being difficult to clean. Furthermore, while the brush plate moves back and forth, the cooperation of the push plate, connecting rod, and piston plate allows gas in the air storage chamber to be blown out through the air nozzle, thus blowing debris from the edge of the worktable towards the center. This solves the problem of debris falling from the edge of the worktable during brush cleaning, preventing ground pollution.

[0018] 3. This invention, through the setting of a cleaning device, allows the L-shaped block to move up and down back and forth when the push plate moves back and forth, in conjunction with the connecting spring. The striking block, in conjunction with the pushing spring, strikes the support base back and forth, causing the support base to vibrate. This vibration is transmitted to the positioning device, vibrating off debris and other contaminants attached to the support base and positioning device, thus enabling large-scale cleaning operations. Furthermore, when the L-shaped block presses against the striking block and moves back and forth, the bending rod, return spring, and long plate work together to insert the insertion rod back and forth into the brush. This solves the problem of welding slag and other contaminants sticking to the brush and being difficult to remove, affecting subsequent cleaning results. The vibration of the insertion rod causes particulate dirt such as welding slag and dust to fall off the brush bristles, keeping the brush clean during cleaning operations. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the workbench structure of the present invention;

[0021] Figure 3 This is a partial structural diagram of the present invention;

[0022] Figure 4 This is a schematic cross-sectional view of the protective cover portion of the present invention;

[0023] Figure 5 This is a schematic diagram of the protective cover structure of the present invention;

[0024] Figure 6 This is a partial structural diagram of the present invention;

[0025] Figure 7 This is a schematic diagram of the protective device and auxiliary device of the present invention;

[0026] Figure 8 This is a schematic cross-sectional view of the brush plate structure of the present invention;

[0027] Figure 9 This is a partial cross-sectional view of the present invention;

[0028] Figure 10 For the present invention Figure 2 Enlarged schematic diagram of structure A;

[0029] Figure 11 This is a schematic diagram of the cleaning device of the present invention.

[0030] In the diagram: 1. Workbench; 2. Support base; 3. Welding machine; 4. Positioning device; 5. Motor; 6. Screw; 7. Threaded sleeve; 8. Protective frame; 9. Moving block; 10. Brush plate; 11. Brush; 121. Compression spring; 122. Magnetic block No. 1; 123. Magnetic block No. 2; 124. Support block; 125. Rotating rod; 126. Gear; 127. Shovel plate; 128. Rack; 131 132. Protrusion; 133. Transmission plate; 134. Inclined groove; 135. Return spring; 136. Air storage chamber; 137. Push plate; 138. Piston plate; 139. Connecting rod; 140. Air nozzle; 141. L-shaped block; 142. Connecting spring; 143. Knocking block; 144. Push spring; 145. Fixing block; 146. Bending rod; 147. Long plate; 148. Insert rod; 149. Return spring. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figures 1-11One embodiment of the present invention is as follows: a welding workbench for easy cleaning of steel trusses, comprising a workbench 1, a support base 2 fixed to the top of the workbench 1, a welding machine 3 mounted on the support base 2, a positioning device 4 mounted on the inner side of the support base 2, the positioning device 4 comprising a bidirectional threaded rod, a clamping sleeve, a bolt, and a pressure plate; the bidirectional threaded rod is rotatably mounted on the inner side of the support base 2, the outer wall of the bidirectional threaded rod is threadedly connected to the clamping sleeve, the clamping sleeve is slidably mounted on the inner side of the support base 2, a bolt passes through the clamping sleeve and is threaded at the penetration point, the bottom of the bolt is rotatably connected to the top of the pressure plate, the pressure plate is slidably mounted on the inner side of the clamping sleeve, a motor 5 is fixed to the side wall of the workbench 1, a screw 6 is fixed to the output end of the motor 5, the screw 6 is rotatably mounted on the inner side of the workbench 1, a threaded sleeve 7 is threadedly connected to the outer wall of the screw 6, a protective frame 8 is fixed to the side of the threaded sleeve 7 away from the screw 6, a moving block 9 passes through the side wall of the protective frame 8 and is slidably connected at the penetration point. A brush plate 10 is slidably mounted on the inner side of the movable block 9, and a brush 11 is fixed to the bottom of the brush plate 10. A protective device for protecting the brush 11 is provided on the side of the protective frame 8 away from the threaded sleeve 7. The protective device includes a compression spring 121, a first magnetic block 122, a second magnetic block 123, a rack 128, a support block 124, a gear 126, a rotating rod 125, and a scraper plate 127. One side of the compression spring 121 is fixed to the inner side of the protective frame 8. The other side of the compression spring 121 is fixed to the top of the brush plate 10. The first magnetic block 122 is fixed to the bottom of the moving block 9. The second magnetic block 123 is fixed to the inner side of the support base 2. The rack 128 is fixed to the inner side of the support base 2. The support block 124 is fixed to the bottom of the moving block 9. The rotating rod 125 passes through the support block 124 and is rotatably connected at the point of penetration. The gear 126 is fixed to the outer wall of the rotating rod 125. The shovel plate 127 is fixed to the outer wall of the rotating rod 125.

[0033] When the brush 11 finishes cleaning the top of the workbench 1 and is reset, because the bottom of the first magnetic block 122 and the top of the second magnetic block 123 are of the same pole, the brush 11 can be extended into the protective frame 8 through the cooperation of the first magnetic block 122 and the second magnetic block 123, thus protecting the brush 11 and preventing it from being exposed when not in use. This would easily cause a large amount of spattered welding slag to adhere to the surface of the brush 11, affecting the subsequent cleaning effect of the brush 11, and the welding temperature would be too high, which could easily damage the brush 11.

[0034] Furthermore, when the brush 11 is cleaning, starting the motor 5 causes the screw 6 to move the threaded sleeve 7, thereby removing the first magnetic block 122 from the top of the second magnetic block 123. Through the cooperation of the compression spring 121, the gear 126 meshes with the rack 128, causing the gear 126 to move on the rack 128 and rotate. Through the cooperation of the rotating rod 125 and the scraper plate 127, the scraper plate 127 can scrape up the weld slag that has cooled and solidified on the top of the workbench 1, solving the problem of weld slag sticking to the top of the workbench 1 and making it inconvenient for the brush 11 to clean.

[0035] In this embodiment, during operation: when welding is required, the workpiece is placed inside the clamping sleeve. Rotating the bidirectional threaded rod forward moves the two sets of clamping sleeves closer together, clamping the workpiece in both left and right positions. Rotating the bolt forward moves the pressure plate downward, clamping the top of the workpiece. After the workpiece is positioned, activating the cylinder at the bottom of the support base 2 moves the welding machine 3 downward for welding. After welding, when cleaning the top surface of the worktable 1 is required, activating the motor 5 causes the screw 6 to rotate forward, moving the threaded sleeve 7 towards... Moving to the left allows the threaded sleeve 7 to move the protective frame 8, causing the protective frame 8 to move the first magnetic block 122 away from the top of the second magnetic block 123. This eliminates the repulsive force between the first magnetic block 122 and the second magnetic block 123, and compresses the compression spring 121. This causes the brush plate 10 to move the brush 11 from the protective frame 8, bringing the brush 11 into contact with the top of the workbench 1. When the brush plate 10 moves downward, it moves the moving block 9 downward, causing the gear 126 to move downward and mesh with the rack 128. When the gear 126 moves downward, it moves the shovel plate 127 downward and... When the threaded sleeve 7 moves to the left, it moves the protective cover to the left, causing the brush 11 to move to the left against the top surface of the workbench 1. When the moving block 9 moves, it causes the gear 126 to move on the rack 128, thus rotating the gear 126. This causes the rotating rod 125 to rotate the scraper plate 127. While the brush 11 is moving and cleaning, the scraper plate 127 rotates, allowing it to scrape up the welding slag and other debris adhering to the surface of the workbench 1, thus facilitating the cleaning operation of the brush 11 and enabling the brush 11 to remove waste and debris adhering to the top surface of the workbench 1. The brush 11 is cleaned and placed in the collection box fixed on the left side of the workbench 1. After the brush 11 has finished cleaning, the screw 6 is reversed by controlling the motor 5, and the threaded sleeve 7 moves to the right on the screw 6 to reset. When the threaded sleeve 7 moves the protective frame 8 to the right to reset, the first magnetic block 122 moves to the top of the second magnetic block 123. The repulsive force between the first magnetic block 122 and the second magnetic block 123 is greater than the elastic coefficient of the compression spring 121. As a result, the first magnetic block 122 moves upward due to the repulsive force, which drives the moving block 9 and the brush plate 10 to move upward, so that the brush 11 moves upward into the protective frame 8 for protection.

[0036] Please see Figures 1-11Based on the above embodiments, in another embodiment of the present invention, an auxiliary device for improving the cleaning efficiency of the brush 11 is provided on the inner side of the protective frame 8. A cleaning device is provided on the protective frame 8. The auxiliary device includes a protrusion 131, a transmission plate 132, a slanted groove 133, a return spring 134, a push plate 136, a connecting rod 138, a piston plate 137, an air storage chamber 135, and an air nozzle 139. The protrusion 131 is fixed to the outer wall of the rotating rod 125. The transmission plate 132 passes through the bottom of the moving block 9 and is slidably connected at the penetration point. The slanted groove 133 is opened at the bottom of the brush plate 10, and the outer wall of the top cylindrical rod of the moving block 9 is in contact with the inner wall of the slanted groove 133. One side of the return spring 134 is fixed to the outer wall of the brush plate 10. Inside the moving block 9, the other side of the reset spring 134 is fixed to the side wall of the brush plate 10. The push plate 136 is slidably installed on the inner wall of the protective frame 8, and the push plate 136 can slide left and right on the inner wall of the protective frame 8. The side wall of the push plate 136 is slidably connected to the side wall of the brush plate 10. The connecting rod 138 is fixed to the side wall of the push plate 136. The air storage chamber 135 is opened on the threaded sleeve 7. The connecting rod 138 passes through the side wall of the threaded sleeve 7 and is slidably connected at the point of penetration. The piston plate 137 is slidably installed on the inner wall of the air storage chamber 135. The end point of the connecting rod 138 is fixedly connected to the side wall of the piston plate 137. The air nozzle 139 is fixed to the side wall of the threaded sleeve 7 and is connected to the air storage chamber 135.

[0037] When the rotating rod 125 rotates, it can drive the protrusion 131 to press against the transmission plate 132. Through the cooperation of the inclined groove 133 and the return spring 134, the brush plate 10 can drive the brush 11 to move back and forth. The brush 11 moves left and right on the surface of the worktable 1, and also moves back and forth, so that the brush 11 can rub in multiple directions on the top of the worktable 1, which solves the problem that the stubborn waste sticking to the surface of the worktable 1 is inconvenient to clean.

[0038] Furthermore, as the brush plate 10 moves back and forth, the gas in the air storage chamber 135 can be blown out through the air nozzle 139 through the cooperation of the push plate 136, the connecting rod 138 and the piston plate 137. This can blow the waste debris on the edge of the workbench 1 towards the center, solving the problem that the waste debris on the edge of the workbench 1 falls off the edge during the cleaning process by the brush 11, causing ground pollution.

[0039] The cleaning device includes an L-shaped block 141, a connecting spring 142, a striking block 143, a pushing spring 144, a bending rod 146, a fixing block 145, a long plate 147, an insert rod 148, and a return spring 149. The L-shaped block 141 extends through the top of the protective frame 8 and is slidably connected at the penetration point. One side of the connecting spring 142 is fixed to the top of the protective frame 8, and the other side of the connecting spring 142 is fixed to the inside of the L-shaped block 141. The striking block 143 is slidably installed on the top of the protective frame 8, and one side of the pushing spring 144 is fixed. The side wall of the bottom protrusion of the striking block 143 is fixed, the other side of the push spring 144 is fixed to the side wall of the top protrusion of the protective frame 8, the fixing block 145 is fixed to the outer wall of the protective frame 8, the bending rod 146 passes through the striking block 143 and is slidably connected at the passage, the long plate 147 is fixed to the end of the bending rod 146, the insert rod 148 is fixed to the side wall of the long plate 147, one side of the return spring 149 is fixed to the side wall of the striking block 143, and the other side of the return spring 149 is fixed to the protrusion at the end of the bending rod 146.

[0040] The bottom of the L-shaped block 141 is set as a slope. When the push plate 136 moves to the left, it will press the bottom slope of the L-shaped block 141, causing the L-shaped block 141 to move upward under the pressure. The end of the L-shaped block 141 is also set as a slope. The slope of the end of the L-shaped block 141 will press the slope of the end of the striking block 143, which will cause the striking block 143 to move to the right and strike the support 2, causing the support 2 to vibrate. The vibration will be transmitted to the positioning device 4, which will vibrate off the waste and debris attached to the support 2 and the positioning device 4, thereby enabling large-scale cleaning operations.

[0041] Furthermore, when the L-shaped block 141 presses against the striking block 143 and moves back and forth, the bending rod 146, the return spring 149, and the long plate 147 work together to allow the insertion rod 148 to be inserted back and forth into the brush 11. This solves the problem that welding slag and other particles are difficult to remove from the brush 11 and affect the subsequent cleaning effect. Under the vibration of the insertion rod 148, the welding slag, dust, and other particulate stains will fall off from the bristles of the brush 11, keeping the brush 11 clean for cleaning operations.

[0042] In this embodiment, during operation: when the rotating rod 125 rotates, it drives the protrusion 131 to rotate. When the protrusion 131 rotates to contact the side wall of the transmission plate 132, the transmission plate 132 is subjected to a squeezing force and moves closer to the brush 11. This causes the cylindrical rod at the top of the transmission plate 132 to be squeezed in the inclined groove 133, which in turn causes the inclined groove 133 to be subjected to a squeezing force, causing the brush plate 10 to move out of the moving block 9 and stretching the return spring 134. When the protrusion 131 rotates to the point where it no longer squeezes the transmission plate 132, the return spring 134 is in a stretched state, which allows the return spring 134 to drive the brush plate 10 to return to its original position. This allows the brush 11 to move to the left and forward and backward on the surface of the worktable 1. The movement of the brush plate 10 improves the cleaning effect. When the brush plate 10 moves from the moving block 9, it presses against the push plate 136, causing the push plate 136 to move closer to the threaded sleeve 7. This push plate 136 then pushes the connecting rod 138, which in turn moves the piston plate 137. The piston plate 137 moves within the air storage chamber 135, allowing air to be blown out of the air nozzle 139. This blows debris from the edge of the worktable 1 to the center of the worktable 1. When the return spring 134 resets the brush plate 10, it also resets the push plate 136, causing the connecting rod 138 to move the piston plate 137 back to its original position. The piston plate 137 draws outside air into the air storage chamber 135 for the next blowing operation. When the push plate 136 approaches the threaded sleeve 7, it presses the bottom slope of the L-shaped block 141, causing the L-shaped block 141 to move upward under pressure, stretching the connecting spring 142. As the L-shaped block 141 moves upward, the slope at the end of the L-shaped block 141 presses against the slope at the end of the striking block 143, causing the end of the striking block 143 to move towards the support seat 2 under pressure, allowing the striking block 143 to strike the side wall of the support seat 2. When the striking block 143 moves towards the support seat 2, it compresses the push spring 144. When the push plate 136 returns to its original position, it stops the L-shaped block from moving upward. The inclined surface at the bottom of block 141 is pressed. Because the connecting spring 142 is in a stretched state, the connecting spring 142 will cause the L-shaped block 141 to move downwards to reset, so that the end of the L-shaped block 141 does not press against the end of the striking block 143. Because the pushing spring 144 is in a compressed state, it will cause the striking block 143 to reset. When the striking block 143 moves closer to the support base 2, it can cause the striking block 143 to move the bending rod 146, so that the bending rod 146 moves to a position where it does not contact the fixed block 145. Because the return spring 149 is in a compressed state, it will cause the bending rod 146 to move, so that the long plate 147 will drive the insert rod 148 to insert into the brush 11. And when the striking block 143 moves the bending rod 146 to reset,This causes the outer wall of the bent rod 146 to press against the inclined surface of the fixed block 145, and the spring force coefficient of the pushing spring 144 is five times that of the return spring 149. This causes the bent rod 146 to move along the inclined surface of the fixed block 145 under pressure, compressing the return spring 149 and causing the long plate 147 to drive the insert rod 148 to reset.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A welding workbench for steel trusses that is easy to clean, comprising a workbench (1), characterized in that: A support base (2) is fixed to the top of the workbench (1). A welding machine (3) is installed on the support base (2). A positioning device (4) is installed on the inner side of the support base (2). The positioning device (4) includes a bidirectional threaded rod, a clamping sleeve, a bolt, and a pressure plate. The bidirectional threaded rod is rotatably installed on the inner side of the support base (2). A clamping sleeve is threadedly connected to the outer wall of the bidirectional threaded rod. The clamping sleeve is slidably installed on the inner side of the support base (2). A bolt passes through the clamping sleeve, and the threaded connection at the through point is established. The bottom of the bolt is rotatably connected to the top of the pressure plate. The pressure plate is slidably installed on the inner side of the clamping sleeve. A motor (5) is fixed to the side wall of the workbench (1). The output end of the motor (5) is fixed with a screw (6), which is rotatably installed on the inner side of the workbench (1). The outer wall of the screw (6) is threaded with a threaded sleeve (7). A protective frame (8) is fixed on the side of the threaded sleeve (7) away from the screw (6). A moving block (9) passes through the side wall of the protective frame (8). A brush plate (10) is slidably installed on the inner side of the moving block (9). A brush (11) is fixed at the bottom of the brush plate (10). A protective device for protecting the brush (11) is provided on the side of the protective frame (8) away from the threaded sleeve (7). An auxiliary device for improving the cleaning efficiency of the brush (11) is provided on the inner side of the protective frame (8). The protective device includes a compression spring (121), a first magnetic block (122), a second magnetic block (123), a rack (128), a support block (124), a gear (126), a rotating rod (125), and a shovel plate (127); one side of the compression spring (121) is fixed to the inside of the protective frame (8), and the other side of the compression spring (121) is fixed to the top of the brush plate (10); The first magnetic block (122) is fixed to the bottom of the moving block (9), the second magnetic block (123) is fixed to the inside of the support base (2), and the rack (128) is fixed to the inside of the support base (2). The support block (124) is fixed to the bottom of the moving block (9), the rotating rod (125) passes through the support block (124) and is rotatably connected at the point of penetration, the gear (126) is fixed to the outer wall of the rotating rod (125), and the shovel plate (127) is fixed to the outer wall of the rotating rod (125). The auxiliary device includes a protrusion (131), a transmission plate (132), a slant groove (133), a return spring (134), a push plate (136), a connecting rod (138), a piston plate (137), an air storage chamber (135), and an air nozzle (139); the protrusion (131) is fixed to the outer wall of the rotating rod (125), the transmission plate (132) passes through the bottom of the moving block (9) and is slidably connected at the passage, the slant groove (133) is opened at the bottom of the brush plate (10), and the outer wall of the top cylindrical rod of the moving block (9) is in contact with the inner wall of the slant groove (133); One side of the reset spring (134) is fixed to the inner side of the moving block (9), and the other side of the reset spring (134) is fixed to the side wall of the brush plate (10). The push plate (136) is slidably installed on the inner wall of the protective frame (8). The side wall of the push plate (136) is slidably connected to the side wall of the brush plate (10). The connecting rod (138) is fixed on the side wall of the push plate (136). The air storage chamber (135) is opened on the threaded sleeve (7). The connecting rod (138) passes through the side wall of the threaded sleeve (7) and is slidably connected at the penetration point. The piston plate (137) is slidably installed on the inner wall of the air storage chamber (135). The end point of the connecting rod (138) is fixedly connected to the side wall of the piston plate (137). The air nozzle (139) is fixed on the side wall of the threaded sleeve (7) and communicates with the air storage chamber (135).

2. The easy-to-clean welding workbench for steel trusses according to claim 1, characterized in that: The protective frame (8) is provided with a cleaning device, which includes an L-shaped block (141), a connecting spring (142), a striking block (143), a pushing spring (144), a bending rod (146), a fixing block (145), a long plate (147), an insert rod (148), and a return spring (149). The L-shaped block (141) passes through the top of the protective frame (8) and is slidably connected at the point of penetration. One side of the connecting spring (142) is fixed to the top of the protective frame (8), and the other side of the connecting spring (142) is fixed to the inner side of the L-shaped block (141). The striking block (143) is slidably installed on the top of the protective frame (8). One side of the pushing spring (144) is fixed to the side wall of the bottom protrusion of the striking block (143), and the other side of the pushing spring (144) is fixed to the side wall of the top protrusion of the protective frame (8).

3. The easy-to-clean welding workbench for steel trusses according to claim 2, characterized in that: The fixing block (145) is fixed to the outer wall of the protective frame (8), the bending rod (146) passes through the striking block (143) and is slidably connected at the point of penetration, the long plate (147) is fixed to the end of the bending rod (146), the insert rod (148) is fixed to the side wall of the long plate (147), one side of the return spring (149) is fixed to the side wall of the striking block (143), and the other side of the return spring (149) is fixed to the protruding end of the bending rod (146).

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