Pipe bending device for peripheral pipe fitting of electric vehicle

Abstract

The invention relates to the technical field of electric vehicle peripheral pipe fitting machining, in particular to an electric vehicle peripheral pipe fitting bending device which comprises a workbench and a guide frame fixedly connected to the workbench, a rotating disc is rotationally connected to the guide frame in the circumferential direction, a hollow pipe fixedly penetrates through the middle of the rotating disc, and a mounting frame is fixedly connected to the workbench. A cutting piece and a bending piece are mounted at the top of the mounting frame. The pipe fitting is arranged on the columnar air bag in a sleeving mode and makes contact with the push rod, the stepping motor is started to enable the clamping plates to clamp and position the pipe fitting through the guide rollers, then the suction pump is started to discharge air into the columnar air bag through the hose, the columnar air bag continuously expands to make close contact with the inner wall of the pipe fitting, and then the pipe fitting can be bent; and the expanded columnar air bag can be in close contact with the inner wall of the pipe fitting to assist in supporting the bent position, so that the pipe fitting is prevented from deforming, and the bending quality of the pipe fitting is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of processing peripheral pipe fittings of electric vehicles, and particularly relates to a bending device for peripheral pipe fittings of electric vehicles. Background Art

[0002] In the electric vehicle manufacturing industry, peripheral pipe fittings are required. In order to make the shape of the peripheral pipe fittings meet the usage requirements, the peripheral pipe fittings need to be bent, and then the bent peripheral pipe fittings are subjected to subsequent processing.

[0003] Chinese Patent with publication number CN116197674A discloses a multi-functional bending device for peripheral pipe fittings of electric vehicles, which relates to the technical field of pipe fitting bending equipment. The multi-functional bending device for peripheral pipe fittings of electric vehicles includes an operating table. Two first electric push rods are symmetrically arranged on the surface of the operating table. The ends of the output shafts of the two retractable first electric push rods are fixedly connected with first L-shaped members. A second L-shaped member is installed on the surface of the operating table. Limiting rods are fixedly connected to the surfaces of the first L-shaped member and the second L-shaped member. A bending wheel for bending the peripheral pipe fittings of electric vehicles is movably sleeved on the surface of the limiting rod. A rubber ring is connected to the surface of the bending wheel. Although the above patent can bend pipe fittings, since the inside of the pipe fitting is hollow, there is a lack of effective support at the bent position inside the pipe fitting, and the pipe fitting is prone to deformation under the bending pressure, which affects the bending quality of the pipe fitting.

[0004] The present invention aims to solve the problems existing in the above patent. Therefore, a bending device for peripheral pipe fittings of electric vehicles is proposed, which can assist in supporting the bent position inside the pipe fitting to prevent the pipe fitting from deforming and improve the bending quality of the pipe fitting. Summary of the Invention

[0005] In order to overcome the disadvantages that since the inside of the pipe fitting is hollow, there is a lack of effective support at the bent position inside the pipe fitting, and the pipe fitting is prone to deformation under the bending pressure, which affects the bending quality of the pipe fitting, the present invention provides a bending device for peripheral pipe fittings of electric vehicles, which can assist in supporting the bent position inside the pipe fitting to prevent the pipe fitting from deforming and improve the bending quality of the pipe fitting.

[0006] The present invention is realized through the following technical solutions:

[0007] An electric vehicle peripheral pipe bending device includes a workbench and a guide frame fixed to the workbench. A turntable is rotatably connected to the guide frame in the circumferential direction. A hollow pipe is fixedly inserted through the middle of the turntable. An installation frame is fixed to the workbench. A cutting piece and a bending piece are installed on the top of the installation frame. The cutting piece is located on the left side of the bending piece. An L-shaped plate located on the right side of the guide frame is fixed to the top of the workbench for placing the pipe. It also includes an n-shaped plate fixed to the inner side of the hollow pipe. A movable block is slidably connected to the inner side of the n-shaped plate. A fixed pipe is fixedly inserted through the movable block. A columnar airbag is fixed to the end of the fixed pipe. The right end of the columnar airbag is located outside the hollow pipe and corresponds to the bending piece. An electric screw rod threadedly connected to the movable block is installed between the hollow pipe and the n-shaped plate. A suction pump is fixedly inserted through the hollow pipe. The suction end of the suction pump is connected to a hose. The tail end of the hose passes through the fixed pipe and is connected to the end of the columnar airbag. The suction pump is used to discharge air into the hose, and the air in the hose is discharged into the columnar airbag to make the columnar airbag expand to assist in supporting the inner bending position of the pipe. A positioning component is arranged on the hollow pipe for positioning and guiding the pipe. A feeding component is arranged on the hollow pipe for pushing the pipe to move.

[0008] Further description, the cutting piece includes an electric slider installed on the installation frame, and an electric saw blade is installed on the electric slider to cut the pipe.

[0009] Further description, the bending piece includes a driving motor installed on the installation frame. An L-shaped seat is fixedly sleeved on the output shaft of the driving motor. Electric sliding seats are installed on both the L-shaped seat and the installation frame. A limiting block is installed on the electric sliding seat in a detachable manner for limiting the pipe. The end of the output shaft of the driving motor is installed in a detachable manner with a bending block located in front of the limiting block to bend the pipe.

[0010] Further description, the positioning component includes three guide rods slidably inserted through the circumference of the hollow pipe at equal intervals. The guide rods are located on the right side of the turntable. A clamping plate is fixed between the inner ends of each group of guide rods for clamping and positioning the pipe. Guide rollers are evenly spaced and installed on the inner side surface of the clamping plate for guiding the pipe. A connecting spring is connected between the end of the guide rod and the hollow pipe. A triggering component is arranged on the hollow pipe for driving the clamping plate to move. [[ID=?]]

[0011] Further description, the triggering component includes a contact rod fixed to the clamping plate. A disc is rotatably connected to the hollow pipe in the circumferential direction. A linear hole for slidingly connecting the end of the contact rod is evenly spaced in the circumferential direction on the disc for driving the contact rod to move. An external gear ring is fixedly sleeved on the outer side surface of the disc in the circumferential direction. A stepping motor is installed on the hollow pipe. A spur gear meshing with the external gear ring is fixed to the end of the output shaft of the stepping motor.

[0012] It should be noted that there is an unclear tag in the original text, which is marked as "[[ID=?]]

[0011] " in the translation. Please check and correct it if necessary.Further description: The material pushing component includes an n-shaped frame fixedly connected to the hollow tube. The n-shaped frame is located on the right side of the turntable. A push rod is slidably sleeved on the n-shaped frame, and the push rod is slidably sleeved on the fixed tube for pushing the pipe fitting to move. A screw rod is rotatably connected between the two sides of the n-shaped frame. The screw rod is threadedly connected to the push rod. A reduction motor is installed on the hollow tube and located on the right side of the turntable. The end of the output shaft of the reduction motor is fixedly connected to the end of the screw rod.

[0013] Further description: The bending device for the peripheral pipe fittings of the electric vehicle further includes a rotating component. The rotating component includes a large pulley fixedly connected to the circumferential side of one side of the turntable. A rotating motor is installed on the top of the workbench. The end of the output shaft of the rotating motor is fixedly sleeved with a small pulley. A flat belt is wound between the small pulley and the large pulley.

[0014] Further description: The bending device for the peripheral pipe fittings of the electric vehicle further includes sliding rods symmetrically and slidably inserted through the L-shaped plate. The top ends of the sliding rods are fixedly connected with an arc-shaped support plate for supporting and placing the pipe fittings. A support spring sleeved on the sliding rod is connected between the arc-shaped support plate and the L-shaped plate.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. By sleeving the pipe fitting on the columnar airbag and contacting the push rod, starting the stepping motor makes the clamping plate clamp and position the pipe fitting through the guide roller. Then, starting the suction pump discharges air into the columnar airbag through the hose. The columnar airbag continuously expands and is in close contact with the inner wall of the pipe fitting, and then the bending of the pipe fitting can be started. The expanded columnar airbag can be in close contact with the inner wall of the pipe fitting to assist in supporting the bending position to prevent the pipe fitting from deforming, thereby improving the quality of the pipe fitting bending.

[0017] 2. Under the action of the rotating component, whenever the pipe fitting needs to be bent in another direction after being bent once, the rotating component can make the clamping plate drive the pipe fitting to rotate through the guide roller, so that the pipe fitting is bent in another direction. In this way, the pipe fitting can be bent in different directions, thus meeting the requirements of different styles of bending of the pipe fitting.

[0018] 3. Under the action of the arc-shaped support plate, it can assist in supporting the pipe fitting, making the pipe fitting closer to the center position for positioning. In this way, it is more convenient to position the pipe fitting, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three-dimensional structural diagram of the present invention.

[0020] Figure 2 is a three-dimensional structural diagram of the bending part of the present invention.

[0021] Figure 3 is a three-dimensional structural diagram of the movable block, fixed tube and columnar airbag of the present invention.

[0022] Figure 4 This is a three-dimensional structural schematic diagram of the hose and electric lead screw of the present invention.

[0023] Figure 5 For the present invention Figure 4 An enlarged schematic diagram of part A in the present invention.

[0024] Figure 6 This is a three-dimensional structural schematic diagram of the positioning component of the present invention.

[0025] Figure 7 This is a three-dimensional structural schematic diagram of the one-word hole and contact rod of the present invention.

[0026] Figure 8 This is a three-dimensional structural schematic diagram of the material pushing component of the present invention.

[0027] Figure 9 This is a three-dimensional structural schematic diagram of the rotating component of the present invention.

[0028] Figure 10 This is a three-dimensional structural schematic diagram of the sliding rod, arc-shaped support plate and support spring of the present invention.

[0029] Names of the reference numerals in the figure: 1, workbench; 2, guide frame; 3, turntable; 4, hollow tube; 5, mounting frame; 6, L-shaped plate; 7, electric slider; 8, electric saw blade; 9, limit block; 91, bending block; 92, drive motor; 93, L-shaped seat; 94, electric sliding seat; 10, n-shaped plate; 11, movable block; 12, fixed tube; 13, columnar airbag; 14, suction pump; 15, hose; 16, electric lead screw; 17, guide rod; 171, connecting spring; 172, clamping plate; 173, guide roller; 174, disc; 175, one-word hole; 176, contact rod; 177, external gear ring; 178, spur gear; 179, stepper motor; 18, n-shaped frame; 181, push rod; 182, screw; 183, reduction motor; 19, rotating motor; 191, small pulley; 192, large pulley; 193, flat belt; 20, sliding rod; 21, arc-shaped support plate; 22, support spring. Detailed implementation manners

[0030] Embodiment: A bending device for peripheral pipe fittings of an electric vehicle. Please refer to Figures 1 - 8As shown in the figure, it includes a workbench 1 and a guide frame 2 fixedly connected to the top of the workbench 1. A turntable 3 is rotatably connected to the left side of the guide frame 2 along the circumferential direction. A hollow tube 4 is fixedly penetrated through the middle of the turntable 3. An installation frame 5 is fixedly connected to the right side surface of the workbench 1. A cutting member and a bending member are installed on the top of the installation frame 5. The cutting member is located on the left side of the bending member. An L-shaped plate 6 is fixedly connected to the upper right front side of the workbench 1. The L-shaped plate 6 is located on the right side of the guide frame 2. The L-shaped plate 6 can be used to place the pipe fittings. It also includes an n-shaped plate 10, a movable block 11, a fixed tube 12, a columnar airbag 13, a suction pump 14, a hose 15, an electric lead screw 16, a positioning assembly and a pushing assembly. An n-shaped plate 10 is fixedly connected to the left side of the inner top of the hollow tube 4. A movable block 11 is horizontally slidably connected to the inner side of the n-shaped plate 10. A fixed tube 12 is fixedly penetrated through the lower part of the movable block 11. A columnar airbag 13 is fixedly connected to the right end of the fixed tube 12. The right end of the columnar airbag 13 is located outside the hollow tube 4 and corresponds to the bending member. An electric lead screw 16 is installed between the left side of the inner top of the hollow tube 4 and the left side of the n-shaped plate 10. The electric lead screw 16 is threadedly connected to the movable block 11. A suction pump 14 is fixedly penetrated through the left side of the top of the hollow tube 4. The suction end of the suction pump 14 is connected to a hose 15. The tail end of the hose 15 passes through the fixed tube 12 and is connected to the left end of the columnar airbag 13. The suction pump 14 is used to discharge air into the hose 15, and the air in the hose 15 is discharged into the columnar airbag 13, so that the columnar airbag 13 expands to assist in supporting the inner bending position of the pipe fitting. A positioning assembly is arranged on the hollow tube 4. When the positioning assembly operates, the positioning assembly can position and guide the pipe fitting. A pushing assembly is arranged on the hollow tube 4. When the pushing assembly operates, the pushing assembly can push the pipe fitting to move to the right.

[0031] Please refer to Figure 2 As shown in the figure, the cutting member includes an electric slider 7 and an electric saw blade 8. An electric slider 7 is installed on the rear side of the top of the installation frame 5. An electric saw blade 8 is installed on the electric slider 7. When the electric saw blade 8 moves forward, the electric saw blade 8 can cut the pipe fitting.

[0032] Please refer to Figure 2 As shown in the figure, the bending member includes a limiting block 9, a bending block 91, a driving motor 92, an L-shaped seat 93 and an electric sliding seat 94. A driving motor 92 is installed on the front side of the installation frame 5. An L-shaped seat 93 is fixedly sleeved on the upper part of the output shaft of the driving motor 92. Electric sliding seats 94 are installed on the rear side of the top of the L-shaped seat 93 and on the right side of the top of the installation frame 5. Limiting blocks 9 are installed on the left and right electric sliding seats 94 in a detachable manner. When the limiting block 9 moves forward and contacts the pipe fitting, the limiting block 9 can limit the pipe fitting. The end of the output shaft of the driving motor 92 is installed with a bending block 91 in a detachable manner. The bending block 91 is located in front of the left and right limiting blocks 9. When the bending block 91 rotates forward, the bending block 91 can bend the pipe fitting.

[0033] Please refer to Figure 6 andFigure 7 As shown in the figure, the positioning component includes a guide rod 17, a connecting spring 171, a clamping plate 172, a guide roller 173 and a trigger component. Three groups of guide rods 17 are slidably inserted along the circumference of the right side of the hollow tube 4 at equal intervals. The number of each group of guide rods 17 is four. The guide rods 17 are located on the right side of the turntable 3. A clamping plate 172 is fixedly connected between the inner ends of each group of four guide rods 17. When the clamping plate 172 moves inward, the clamping plate 172 can clamp and position the pipe fitting. Guide rollers 173 are evenly spaced on the right side of the inner side surfaces of the three clamping plates 172. When the pipe fitting moves to the right, the guide rollers 173 can guide the pipe fitting. A connecting spring 171 is connected between the outer end of the guide rod 17 and the outer side surface of the hollow tube 4. A trigger component is arranged on the left side of the hollow tube 4. When the trigger component operates, the trigger component can drive the clamping plate 172 to move; the trigger component includes a disc 174, a contact rod 176, an external gear ring 177, a spur gear 178 and a stepping motor 179. Contact rods 176 are fixedly connected to the left side surfaces of the three clamping plates 172. A disc 174 is rotatably connected along the circumference of the left side of the hollow tube 4. Three slot holes 175 are evenly spaced along the circumference of the disc 174. The three slot holes 175 are respectively slidably connected to the left ends of the three contact rods 176. When the slot hole 175 rotates, the slot hole 175 can drive the contact rod 176 to move. An external gear ring 177 is fixedly sleeved on the outer side surface of the disc 174 along the circumference. A stepping motor 179 is installed on the left side of the outer bottom of the hollow tube 4. The end of the output shaft of the stepping motor 179 is fixedly connected to a spur gear 178. The spur gear 178 meshes with the external gear ring 177.

[0034] Please refer to Figure 8 Figure 8 As shown in the figure, the feeding component includes an n-shaped frame 18, a push rod 181, a screw rod 182 and a reduction motor 183. An n-shaped frame 18 is fixedly connected to the right side of the outer top of the hollow tube 4. The n-shaped frame 18 is located on the right side of the turntable 3. A push rod 181 is slidably sleeved on the n-shaped frame 18. The lower part of the push rod 181 is slidably sleeved on the outer side surface of the fixed tube 12. When the push rod 181 moves to the right, the push rod 181 can push the pipe fitting to move to the right. A screw rod 182 is rotatably inserted between the left and right sides of the lower part of the n-shaped frame 18. The screw rod 182 is threadedly connected to the upper part of the push rod 181. A reduction motor 183 is installed on the left side of the outer top of the hollow tube 4. The reduction motor 183 is located on the right side of the turntable 3. The end of the output shaft of the reduction motor 183 is fixedly connected to the left end of the screw rod 182.

[0035] ​First, replace the limit block 9 and the bending block 91 according to the size of the pipe fitting. Then, put the pipe fitting on the columnar airbag 13 and the fixed pipe 12. The left end of the pipe fitting contacts the push rod 181, and the pipe fitting is placed on the L-shaped plate 6. Then, start the stepping motor 179 to drive the spur gear 178 to rotate forward. The forward rotation of the spur gear 178 drives the external gear ring 177 to rotate reversely. The reverse rotation of the external gear ring 177 drives the slotted hole 175 to rotate reversely. The reverse rotation of the slotted hole 175 drives the three contact rods 176 to move inward. The contact rods 176 drive the three clamping plates 172 to move inward. The clamping plates 172 drive the guide rod 17 to move inward, and the connecting spring 171 is compressed. The inward movement of the clamping plates 172 drives the guide rollers 173 to move inward. The guide rollers 173 move inward and contact the pipe fitting. The three clamping plates 172 center the pipe fitting through the guide rollers 173. The pipe fitting contacts the inner side of the bending block 91. Close the stepping motor 179, and the clamping plates 172 stop moving inward. At this time, start the suction pump 14. The suction pump 14 discharges air into the hose 15. The hose 15 discharges air into the columnar airbag 13. As the air is discharged, the columnar airbag 13 continuously expands and closely contacts the inner wall of the pipe fitting for auxiliary support. Close the suction pump 14. Then, start the electric slide 94 to drive the limit block 9 to move forward. The limit block 9 moves forward and contacts the pipe fitting. The limit block 9 and the bending block 91 cooperate to limit the limit block 9. Close the electric slide 94. Then, start the driving motor 92 to rotate forward to drive the L-shaped seat 93 and the bending block 91 to rotate forward. The forward rotation of the L-shaped seat 93 drives the right limit block 9 to rotate forward through the right electric slide 94. The forward rotation of the right limit block 9 and the bending block 91 cooperate to bend the pipe fitting. During the bending process of the pipe fitting, the expanded columnar airbag 13 closely contacts the inner wall of the pipe fitting to assist in supporting the bending position to prevent the pipe fitting from deforming, thereby improving the quality of the pipe fitting bending. When the pipe fitting is bent to the required angle, close the driving motor 92, and the bending block 91 and the L-shaped seat 93 stop rotating forward. The L-shaped seat 93 stops driving the right limit block 9 to rotate forward through the right electric slide 94. Start the left and right electric slides 94 to drive the left and right limit blocks 9 to move back to their original positions. The limit block 9 returns to its original position and disengages from the pipe fitting. At this time, start the reduction motor 183 to drive the screw 182 to rotate reversely. The reverse rotation of the screw 182 drives the push rod 181 to move to the right. The push rod 181 moves to the right and pushes the pipe fitting to move to the right. The guide roller 173 guides the pipe fitting moving to the right. When the next bending position of the pipe fitting contacts the bending block 91 as it moves to the right, close the reduction motor 183. The reduction motor 183 stops driving the screw 182 to rotate reversely. The screw 182 stops driving the push rod 181 to move to the right. The push rod 181 stops driving the pipe fitting to move to the right. At this time, start the driving motor 92 to drive the L-shaped seat 93 and the bending block 91 to rotate reversely and return to their original positions. The L-shaped seat 93 returns to its original position and drives the right limit block 9 to swing to the left and return to its original position through the right electric slide 94. Then, start the left and right electric slides 94 to drive the left and right limit blocks 9 to move forward to contact the pipe fitting for limiting. By following the above operations, the pipe fitting can be bent again. Repeating this process can continuously bend the pipe fitting.After the pipe fitting is bent, start the electric slider 7 to drive the electric saw blade 8 to move forward. The electric saw blade 8 moves forward to cut the pipe fitting so that the bent pipe fitting reaches the required length. After the pipe fitting is cut, start the electric slider 7 to drive the electric saw blade 8 to move backward and reset. Then remove the bent pipe fitting for subsequent processing. Start the reduction motor 183 to drive the screw 182 to rotate forward. The forward rotation of the screw 182 drives the push rod 181 to move leftward and reset. Then start the suction pump 14 to draw the air in the columnar airbag 13 through the hose 15. As the air is drawn away, the columnar airbag 13 continuously shrinks and resets. At the same time, start the stepping motor 179 to drive the spur gear 178 to rotate reversely. The reverse rotation of the spur gear 178 drives the external gear ring 177 to rotate forward. The forward rotation of the external gear ring 177 drives the three contact rods 176 to move outward and reset through the one-way hole 175. The contact rod 176 drives the three clamping plates 172 to move outward and reset. The reset of the clamping plate 172 drives the guide roller 173 to move outward and reset. The reset of the guide roller 173 releases the cut pipe fitting waste, and the operator can remove the pipe fitting waste. At the same time, the clamping plate 172 also drives the guide rod 17 to move outward and reset. The guide rod 17 resets the connecting spring 171. In this way, the pipe fitting can be bent continuously according to the above operations.

[0036] Please refer to Figure 9 As shown, the pipe bending device for the outer pipe fittings of the electric vehicle further includes a rotating assembly installed between the turntable 3 and the workbench 1. The rotating assembly includes a rotating motor 19, a small pulley 191, a large pulley 192, and a flat belt 193. The large pulley 192 is fixedly connected to the left side surface of the turntable 3 along the circumference. The rotating motor 19 is installed on the left side of the top of the workbench 1. The end of the output shaft of the rotating motor 19 is fixedly sleeved with the small pulley 191. The flat belt 193 is wound between the small pulley 191 and the large pulley 192.

[0037] When the pipe fitting is bent by the cooperation of the right limiting block 9 and the bending block 91 and the pipe fitting needs to be bent in another direction, start the rotating motor 19 to drive the small pulley 191 to rotate. The rotation of the small pulley 191 drives the large pulley 192 to rotate through the flat belt 193. The rotation of the large pulley 192 drives the turntable 3 to rotate. The rotation of the turntable 3 drives the hollow pipe 4 to rotate. The rotation of the hollow pipe 4 drives the clamping plate 172 to rotate through the guide rod 17. The clamping plate 172 drives the pipe fitting to rotate through the guide roller 173. When the pipe fitting rotates to the required angle, turn off the rotating motor 19. The rotating motor 19 stops driving the small pulley 191 to rotate. The small pulley 191 stops driving the large pulley 192 to rotate through the flat belt 193. The large pulley 192 stops driving the turntable 3 to rotate. The turntable 3 stops driving the hollow pipe 4 to rotate. The hollow pipe 4 stops driving the guide rod 17 to drive the clamping plate 172 to rotate. The clamping plate 172 stops driving the pipe fitting to rotate through the guide roller 173, and then the pipe fitting can be bent continuously. In this way, the pipe fitting can be bent in different directions to meet the requirements of different styles of pipe fitting bending.

[0038] Please refer to Figure 10 As shown, the pipe bending device for the peripheral pipe fittings of the electric vehicle further includes a sliding rod 20, an arc-shaped support plate 21 and a support spring 22. The sliding rod 20 is symmetrically and slidably connected to the left and right sides of the rear of the L-shaped plate 6. The top end of the sliding rod 20 is fixedly connected with the arc-shaped support plate 21. The arc-shaped support plate 21 can support and place the pipe fittings. A support spring 22 is connected between the bottom of the arc-shaped support plate 21 and the rear side of the outer top of the L-shaped plate 6. The support spring 22 is sleeved on the sliding rod 20.

[0039] When the pipe fitting is sleeved on the columnar airbag 13, the pipe fitting is placed between the two arc-shaped support plates 21. Due to the action of the support spring 22, the arc-shaped support plate 21 supports and limits the pipe fitting, so that the arc-shaped support plate 21 is as close to the center position as possible, and then the pipe fitting is positioned. In this way, it is more convenient to position the pipe fitting, thereby improving work efficiency.

Claims

1. An electric vehicle peripheral pipe bending device, comprising a workbench (1) and a guide frame (2) fixedly connected to the workbench (1). A turntable (3) is rotatably connected to the guide frame (2) along the circumferential direction. A hollow pipe (4) is fixedly inserted through the middle of the turntable (3). An installation frame (5) is fixedly connected to the workbench (1). A cutting member and a bending member are installed at the top of the installation frame (5). The cutting member is located on the left side of the bending member. An L-shaped plate (6) is fixedly connected to the top of the workbench (1) and located on the right side of the guide frame (2) for placing the pipe fittings. It is characterized in that, It further includes an n-shaped plate (10) fixedly connected to the inner side of the hollow tube (4). An active block (11) is slidably connected to the inner side of the n-shaped plate (10). A fixed tube (12) is fixedly inserted through the active block (11). A columnar airbag (13) is fixedly connected to the end of the fixed tube (12). The right end of the columnar airbag (13) is located outside the hollow tube (4) and corresponds to the bending part. An electric lead screw (16) threadedly connected to the active block (11) is installed between the hollow tube (4) and the n-shaped plate (10). A suction pump (14) is fixedly inserted through the hollow tube (4). The suction end of the suction pump (14) is connected to a hose (15). The tail end of the hose (15) passes through the fixed tube (12) and is connected to the end of the columnar airbag (13). The suction pump (14) is used to discharge air into the hose (15), and the air in the hose (15) is discharged into the columnar airbag (13) so that the columnar airbag (13) expands to assist in supporting the inner bending position of the pipe fitting. A positioning assembly is arranged on the hollow tube (4) for positioning and guiding the pipe fitting. A pushing component is arranged on the hollow tube (4) for pushing the pipe fitting to move.

2. The bending device for the peripheral pipe fittings of an electric vehicle according to claim 1, characterized in that, The cutting part includes an electric slider (7) installed on the mounting frame (5). An electric saw blade (8) is installed on the electric slider (7) to cut the pipe fitting.

3. The bending device for the peripheral pipe fittings of an electric vehicle according to claim 2, wherein, The bending part includes a driving motor (92) installed on the mounting frame (5). An L-shaped seat (93) is fixedly sleeved on the output shaft of the driving motor (92). Electric sliding seats (94) are installed on both the L-shaped seat (93) and the mounting frame (5). A limiting block (9) is installed on the electric sliding seat (94) in a detachable manner for limiting the pipe fitting. The end of the output shaft of the driving motor (92) is installed in a detachable manner with a bending block (91) located in front of the limiting block (9) to bend the pipe fitting.

4. The pipe bending device for the peripheral pipe fittings of an electric vehicle according to claim 3, characterized in that The positioning assembly includes three guide rods (17) slidably inserted through the circumference of the hollow tube (4) at equal intervals. The guide rods (17) are located on the right side of the turntable (3). A clamping plate (172) is fixedly connected between the inner ends of each group of guide rods (17) for clamping and positioning the pipe fitting. Guide rollers (173) are evenly spaced on the inner side surface of the clamping plate (172) to guide the pipe fitting. A connecting spring (171) is connected between the end of the guide rod (17) and the hollow tube (4). A triggering assembly is arranged on the hollow tube (4) for driving the clamping plate (172) to move.

5. The bending device for the peripheral pipe fittings of an electric vehicle according to claim 4, characterized in that, The triggering assembly includes a contact rod (176) fixedly connected to the clamping plate (172). A disc (174) is rotatably connected to the hollow tube (4) along the circumference. A linear hole (175) for slidably connecting the end of the contact rod (176) is evenly spaced along the circumference on the disc (174) for driving the contact rod (176) to move. An external gear ring (177) is fixedly sleeved on the outer side surface of the disc (174) along the circumference. A stepping motor (179) is installed on the hollow tube (4). A spur gear (178) meshing with the external gear ring (177) is fixedly connected to the end of the output shaft of the stepping motor (179).

6. The bending device for the peripheral pipe fittings of an electric vehicle according to claim 5, characterized in that, The pushing component includes an n-shaped frame (18) fixedly connected to the hollow pipe (4). The n-shaped frame (18) is located on the right side of the turntable (3). A push rod (181) is slidably sleeved on the n-shaped frame (18). The push rod (181) is slidably sleeved on the fixed pipe (12) and is used to push the pipe fitting to move. A screw rod (182) is rotatably connected between the two sides of the n-shaped frame (18). The screw rod (182) is threadedly connected to the push rod (181). A reduction motor (183) is installed on the hollow pipe (4) and is located on the right side of the turntable (3). The end of the output shaft of the reduction motor (183) is fixedly connected to the end of the screw rod (182).

7. The pipe bending device for the peripheral pipe fittings of an electric vehicle according to claim 6, characterized in that, The bending device for the peripheral pipe fittings of the electric vehicle further includes a rotating component. The rotating component includes a large pulley (192) fixedly connected to the circumference of one side of the turntable (3). A rotating motor (19) is installed on the top of the workbench (1). The end of the output shaft of the rotating motor (19) is fixedly sleeved with a small pulley (191). A flat belt (193) is wound between the small pulley (191) and the large pulley (192).

8. The elbow pipe device for the peripheral pipe fittings of an electric vehicle according to claim 7, characterized in that, The bending device for the peripheral pipe fittings of the electric vehicle further includes sliding rods (20) symmetrically and slidably inserted through the L-shaped plate (6). The top ends of the sliding rods (20) are fixedly connected with an arc-shaped support plate (21) for supporting and placing the pipe fittings. A support spring (22) sleeved on the sliding rods (20) is connected between the arc-shaped support plate (21) and the L-shaped plate (6).

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