Clamp for bending aluminum pipe

Abstract

The invention discloses a clamp for bending an aluminum pipe, which relates to the technical field of bending clamps and comprises a force applying device, a twisting device, a clamping device, an aluminum pipe fitting and a forming assembly. According to the clamping device, one end of an aluminum pipe fitting is inserted between a clamping sleeve and a clamping inner shell, then a clamping rotary disc is manually rotated, the clamping rotary disc drives a conical head sliding shaft and a clamping ball to oppositely slide through a third connecting rod and a fourth connecting rod, and the conical head sliding shaft drives a second elastic pressing block to extend outwards; the clamping balls drive the first elastic pressing blocks to extend inwards through the clamping lead screws, so that the function of synchronously clamping the inner wall and the outer wall of the aluminum pipe fitting is achieved. The force applying device drives a first gear to rotate through a torque increasing device, the first gear drives a first lead screw and a second lead screw to rotate through a second gear and a fourth gear, the first lead screw and the second lead screw drive a first sliding block and a second sliding block to slide inwards correspondingly, and the first lead screw further drives a forming assembly to stretch out through a third gear; therefore, multi-point force application on the aluminum pipe fitting is realized.

Description

Technical Field

[0001] The invention relates to the technical field of bending fixtures, and in particular to a fixture for bending an aluminum tube. Background Art

[0002] When bending the aluminum tube, the two ends or one end of the aluminum tube must be fixed with a clamp. If the clamp is not firmly fixed to the aluminum tube, the aluminum tube will break away from the clamp due to internal stress and external pressure, thus causing a safety accident. At the same time, the clamp's fixation of the aluminum tube is also conducive to the stability of the aluminum tube during the bending process, making it easier to reach the preset angle of the bending angle. Therefore, in the bending process of the aluminum tube, the clamp is a key device to ensure the bending of the aluminum tube.

[0003] Most of the existing aluminum tube bending clamps only consider the fixing function of the aluminum tube; however, during the aluminum tube bending process, due to the limitation of the material itself, there will be a certain rebound after bending, so a certain bending angle will be increased during bending to offset the rebound of the material, but due to the different thicknesses of aluminum tubes of different models, the degree of rebound is also different, which increases the difficulty of bending; however, the existing aluminum tube bending clamps cannot freely adjust the bending angle, nor can they bend the aluminum tube multiple times; therefore, there is a need for an aluminum tube bending clamp that can perform multiple bends on aluminum tubes of different wall thicknesses and can freely adjust the bending angle to solve the shortcomings of the existing aluminum tube bending clamps.

[0004] For example, the patent with announcement number CN115532895B provides a semi-automatic bending fixture for metal processing, which includes a fixture mechanism and a limiting mechanism, wherein the limiting mechanism is used for limiting the metal, and the fixture mechanism is used for clamping the metal. The application can realize the bending of the metal twice, and can also reinforce the bending part of the metal after bending, so that the metal is more stable after bending. However, this solution cannot realize the clamping of aluminum tubes with different wall thicknesses, thereby failing to improve the flexibility of the clamp to clamp the aluminum tube; when bending the metal, the solution will heat the metal, making it easier to bend, but when the heating temperature is too high, it will cause excessive deformation of the metal or cause the metal performance to deteriorate; at the same time, the solution has fewer pressure points, and cannot further improve the efficiency of metal bending; although the solution can bend the metal twice, it cannot be bent more times. When the metal still cannot reach the ideal bending effect after two bends, it cannot be bent for the third time or more times. Summary of the invention

[0005] The purpose of the present invention is to provide a clamp for bending aluminum tubes, aiming to solve technical problems existing in the prior art such as how to clamp aluminum tubes with different wall thicknesses, how to apply force to the aluminum tubes at multiple points to avoid the side effects of the heating bending method, and how to achieve multiple bending of the aluminum tubes to freely adjust the bending angle.

[0006] In view of the above technical problems, the technical solution adopted by the present invention is: a clamp for bending an aluminum tube, comprising a force-applying device, a twisting device, a clamping device, an aluminum tube, and a forming assembly; the force-applying device is provided with a force-applying base, a first slider, a second slider, a first lead screw, a third gear, and a second lead screw; the first slider is slidably mounted on the upper end of the force-applying base in a horizontal direction; the second slider is slidably mounted on the upper end of the force-applying base in a horizontal direction; the right end of the first lead screw is rotatably connected in the force-applying base; the left end of the first lead screw is fixedly connected to the right end of the third gear; the external thread on the first lead screw also forms a thread pair with the internal thread on the second slider; the left end of the second lead screw is rotatably connected in the force-applying base; the right end of the second lead screw is fixedly connected to the left end of the third gear; The external thread on the second lead screw also forms a thread pair with the internal thread on the first slider; the first lead screw and the second lead screw respectively drive the second slider and the first slider to slide inward, and the second slider and the first slider drive the aluminum pipe fitting to bend through the clamping device, and the first lead screw also drives the forming component to extend forward through the third gear, and the forming component applies pressure to the bending part to realize the multi-point force application function on the aluminum pipe fitting; the torsion device is fixedly installed inside the force base; the two clamping devices are respectively rotatably connected to the upper end of the first slider and the upper end of the second slider; the aluminum pipe fitting is slidably installed in the clamping device along the axial direction of the clamping device; the forming component is slidably installed on the upper end of the force base along the radial direction of the aluminum pipe fitting; the forming component also forms a gear rack pair with the third gear.

[0007] Furthermore, the force-applying device also includes a first gear, a second gear, a first connecting rod, a pulling assembly, a second connecting rod, and a fourth gear; the first gear is rotatably connected to the left side of the force-applying base; the first gear is also fixedly installed on the left side of the torsion device along the axial direction of the torsion device; the second gear is rotatably connected to the left side of the force-applying base; the second gear and the first gear constitute a gear pair; the two ends of the first connecting rod are respectively hinged to the upper end of the first slider and the upper end of the pulling assembly; the two ends of the second connecting rod are respectively hinged to the upper end of the second slider and the upper end of the pulling assembly; the fourth gear is fixedly installed on the left end of the second lead screw; the fourth gear also constitutes a threaded pair with the second gear.

[0008] Furthermore, the pulling assembly includes a pulling rack, a pulling slide, a pulling connecting frame, and an elastic sleeve; the pulling rack is slidably installed on the lower end of the pulling slide along the radial direction of the aluminum pipe fitting; the pulling rack is also fixedly connected to the pulling slide by bolts; the pulling slide is slidably installed on the upper end of the force base along the radial direction of the aluminum pipe fitting; the upper end of the pulling slide is rotatably connected to the first connecting rod and the second connecting rod respectively; the pulling connecting frame is fixedly installed on the upper end of the pulling slide; the pulling connecting frame is also fixedly connected to the forming assembly by bolts; the elastic sleeve is fixedly installed on the side of the pulling connecting frame; the elastic sleeve is slidably connected to the outer cylindrical surface of the aluminum pipe fitting along the axial direction.

[0009] Furthermore, the torque adding device includes a torsion adding shaft, a shifting assembly, a torsion adding spring, a first clutch plate, a motor, a fifth gear, a torsion adding transmission shaft, and a second clutch plate; the left end of the torsion adding shaft is fixedly connected to the right end of the first gear; the right end of the torsion adding shaft is fixedly connected to the left end of the second clutch plate; the shifting assembly is slidably installed on the periphery of the torsion adding shaft along the axial direction of the torsion adding shaft; the torsion adding spring is fixedly installed on the right end of the shifting assembly along the axial direction; the first clutch plate is fixedly installed on the right end of the torsion adding spring; the first clutch plate is also slidably installed on the periphery of the torsion adding shaft along the axial direction; the second clutch plate is fixedly installed on the left end of the torsion adding transmission shaft; the second clutch plate is meshed with the first clutch plate; the fifth gear is fixedly installed on the periphery of the torsion adding transmission shaft; the fifth gear also forms a gear rack pair with the pulling rack; the torsion adding transmission shaft is fixedly installed on the output end of the motor along the axial direction; the motor is fixedly installed inside the force base.

[0010] Furthermore, the torsion shaft includes a shift shaft, a shift socket, a shift slot, and a connecting shaft; the left end of the shift shaft is fixedly connected to the right end of the first gear; the left end of the connecting shaft is fixedly installed on the right end of the shift shaft; the right end of the shift shaft is fixedly connected to the left end of the second clutch plate; the shift shaft is provided with a shift slot along the axial direction; and the shift shaft is provided with a shift socket along the radial direction.

[0011] Furthermore, the shift assembly includes a spring pin, a shift slide, and a shift plate; the spring pin is slidably installed in the shift slide along the radial direction; the spring pin is also fixedly connected to the inside of the shift slide through a spring; the shift slide is fixedly installed on the left side of the shift plate; the shift slide is also slidably installed inside the shift slide along the axial direction of the shift slide; the shift plate is slidably installed on the periphery of the connecting shaft along the axial direction of the connecting shaft; the right end of the shift plate is also fixedly connected to the left end of the torsion spring.

[0012] Furthermore, the clamping device includes a clamping base, a clamping rod, a clamping shell, a third connecting rod, a clamping turntable, a fourth connecting rod, an octagonal column, a clamping ball, a clamping screw, a clamping inner shell, a crescent protrusion, a first elastic pressure block, a second elastic pressure block, a clamping sleeve, and a cone head sliding shaft; the clamping base is rotatably connected to the upper end of the first slider and the upper end of the second slider; the clamping rod is slidably installed on the clamping inner shell and the clamping sleeve along the axial direction; the lower end of the clamping rod is fixedly connected to the outer cylindrical surface of the cone head sliding shaft; the clamping shell is fixedly installed on the side of the clamping base; the clamping turntable is rotatably connected to the upper end of the clamping shell; the two ends of the third connecting rod are respectively hinged at the upper end of the clamping rod and the upper surface of the clamping turntable; the two ends of the fourth connecting rod are respectively hinged Connected to the upper end of the clamping ball and the upper surface of the clamping turntable; the octagonal plug is slidably installed in the clamping turntable and the clamping shell along the vertical direction; the internal thread on the clamping ball and the external thread on the clamping screw constitute a thread pair; the clamping screw is rotatably connected to the inner cylindrical surface of the clamping shell; a crescent protrusion is provided on the inner cylindrical surface of the clamping screw; the crescent protrusion is in frictional contact with the first elastic pressure block; the clamping inner shell is fixedly installed on the side of the clamping base; the first elastic pressure block is slidably installed on the clamping inner shell along the radial direction of the clamping inner shell; the second elastic pressure block is slidably installed on the clamping sleeve along the radial direction of the clamping sleeve; the cone head sliding shaft is slidably installed inside the clamping sleeve along the axial direction; the outer periphery of the cone head sliding shaft is in frictional contact with the second elastic pressure block.

[0013] Furthermore, the forming assembly includes a forming pressure head, a forming slide groove, a forming slider, and a forming rack; the forming pressure head is fixedly mounted at the front end of the forming slider; the front end of the forming pressure head is in frictional contact with the outer cylindrical surface of the elastic sleeve; the upper surface of the forming slider is fixedly connected to the lower end of the pulling connecting frame by bolts; a forming slide groove is also provided at the lower end of the forming slider; the forming slide groove is slidably mounted on the upper surface of the force base; the forming rack is fixedly mounted at the lower end of the forming slider; the forming rack and the third gear constitute a gear rack pair.

[0014] Compared with the prior art, the present invention has the following beneficial effects: (1) The clamping device inserts one end of the aluminum pipe fitting between the clamping sleeve and the clamping inner shell, and then manually rotates the clamping turntable. The clamping turntable drives the cone head sliding shaft and the clamping ball to slide toward each other through the third connecting rod and the fourth connecting rod respectively. The cone head sliding shaft drives the second elastic pressure block to extend outward, and the clamping ball drives the first elastic pressure block to extend inward through the clamping screw, so as to achieve the synchronous clamping function of the inner wall and the outer wall of the aluminum pipe fitting. (2) The force applying device drives the first gear to rotate through the twisting device, and the first gear drives the first screw and the second screw to rotate through the second gear and the fourth gear. The first screw and the second screw drive the first slider and the second slider to slide inward respectively. The first screw also drives the forming component to extend through the third gear, so as to achieve multi-point force application on the aluminum pipe fitting. (3) The torque adding device changes the elastic force of the torque adding spring on the first clutch disc by manually sliding the shift assembly, thereby changing the pre-compression force between the first clutch disc and the second clutch disc, thereby realizing the function of adjusting the transmitted torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the general assembly structure of the working state of an embodiment of the present invention.

[0016] Figure 2 It is a structural schematic diagram of the force applying device of the present invention.

[0017] Figure 3 It is a schematic structural diagram of the pulling assembly of the present invention.

[0018] Figure 4 It is a schematic structural diagram of the twisting device of the present invention.

[0019] Figure 5 This is a schematic diagram of the structure of the present invention with a torsion shaft.

[0020] Figure 6 It is a schematic structural diagram of the shift assembly of the present invention.

[0021] Figure 7 The structure of the clamping device of the present invention is schematically shown in FIG. Figure 1 .

[0022] Figure 8 The structure of the clamping device of the present invention is shown in FIG. Figure 2 .

[0023] Fig. 9 It is a schematic structural diagram of the molding component of the present invention.

[0024] In the figure: 1-force-applying device; 2-torsion-applying device; 3-clamping device; 4-aluminum pipe fitting; 5-molding component; 101-first gear; 102-force-applying base; 103-second gear; 104-first slider; 105-first connecting rod; 106-pulling component; 107-second connecting rod; 108-second slider; 109-first lead screw; 110-third gear; 111-second lead screw; 112-fourth gear; 113-pulling rack; 114-pulling slide; 115-pulling connecting frame; 116-elastic sleeve; 201-torsion-applying shaft; 202-shifting component; 203-torsion-applying spring; 204-first clutch plate; 205-motor; 206-fifth gear; 207-torsion-applying transmission shaft ;208-second clutch plate;209-shift shaft;210-shift socket;211-shift slide groove;212-connecting shaft;213-spring pin;214-shift slide column;215-shift plate;301-clamping base;302-clamping pull rod;303-clamping shell;304-third connecting rod;305-clamping turntable;306-fourth connecting rod;307-octagonal plug column;308-clamping ball;309-clamping screw;310-clamping inner shell;311-crescent lug;312-first elastic pressure block;313-second elastic pressure block;314-clamping sleeve;315-conical head slide shaft;501-molding pressure head;502-molding slide groove;503-molding slider;504-molding rack. DETAILED DESCRIPTION

[0025] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0026] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present application; in order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0027] Figures 1 to 9 It is a preferred embodiment of the present invention.

[0028] like Figure 1As shown, the force-applying device 1 is provided with a force-applying base 102, a first slider 104, a second slider 108, a first lead screw 109, a third gear 110, and a second lead screw 111; the first slider 104 is slidably installed on the upper end of the force-applying base 102 in the horizontal direction; the second slider 108 is slidably installed on the upper end of the force-applying base 102 in the horizontal direction; the right end of the first lead screw 109 is rotatably connected in the force-applying base 102; the left end of the first lead screw 109 is fixedly connected to the right end of the third gear 110; the external thread on the first lead screw 109 also forms a thread pair with the internal thread on the second slider 108; the left end of the second lead screw 111 is rotatably connected in the force-applying base 102; the right end of the second lead screw 111 is fixedly connected to the left end of the third gear 110; the external thread on the second lead screw 111 is also connected to the internal thread on the first slider 104 A threaded pair is formed; the first lead screw 109 and the second lead screw 111 respectively drive the second slider 108 and the first slider 104 to slide inward, the second slider 108 and the first slider 104 drive the aluminum pipe 4 to bend through the clamping device 3, the first lead screw 109 also drives the forming component 5 to extend forward through the third gear 110, and the forming component 5 applies pressure to the bending part to realize the multi-point force application function on the aluminum pipe 4; the twisting device 2 is fixedly installed inside the force base 102; the two clamping devices 3 are respectively rotatably connected to the upper end of the first slider 104 and the upper end of the second slider 108; the aluminum pipe 4 is slidably installed in the clamping device 3 along the axial direction of the clamping device 3; the forming component 5 is slidably installed on the upper end of the force base 102 along the radial direction of the aluminum pipe 4; the forming component 5 also forms a gear rack pair with the third gear 110.

[0029] like Figure 2 As shown, in the force-applying device 1, the first gear 101 is rotatably connected to the left side of the force-applying base 102; the first gear 101 is also fixedly installed on the left side of the torsion device 2 along the axial direction of the torsion device 2; the second gear 103 is rotatably connected to the left side of the force-applying base 102; the second gear 103 and the first gear 101 constitute a gear pair; the two ends of the first connecting rod 105 are respectively hinged to the upper end of the first slider 104 and the upper end of the pulling assembly 106; the two ends of the second connecting rod 107 are respectively hinged to the upper end of the second slider 108 and the upper end of the pulling assembly 106; the fourth gear 112 is fixedly installed at the left end of the second lead screw 111; the fourth gear 112 also constitutes a threaded pair with the second gear 103.

[0030] like Figure 3As shown, in the pulling assembly 106, the pulling rack 113 is slidably installed on the lower end of the pulling slide 114 along the radial direction of the aluminum pipe fitting 4; the pulling rack 113 is also fixedly connected to the pulling slide 114 by bolts; the pulling slide 114 is slidably installed on the upper end of the force base 102 along the radial direction of the aluminum pipe fitting 4; the upper end of the pulling slide 114 is rotatably connected to the first connecting rod 105 and the second connecting rod 107 respectively; the pulling connecting frame 115 is fixedly installed on the upper end of the pulling slide 114; the pulling connecting frame 115 is also fixedly connected to the forming assembly 5 by bolts; the elastic sleeve 116 is fixedly installed on the side of the pulling connecting frame 115; the elastic sleeve 116 is slidably connected to the outer cylindrical surface of the aluminum pipe fitting 4 along the axial direction.

[0031] like Figure 4 As shown, in the torque adding device 2, the left end of the torque adding shaft 201 is fixedly connected to the right end of the first gear 101; the right end of the torque adding shaft 201 is fixedly connected to the left end of the second clutch plate 208; the shift assembly 202 is slidably installed on the periphery of the torque adding shaft 201 along the axial direction of the torque adding shaft 201; the torque adding spring 203 is fixedly installed on the right end of the shift assembly 202 along the axial direction; the first clutch plate 204 is fixedly installed on the right end of the torque adding spring 203; the first clutch plate 204 is also slidably installed along the axial direction of the torque adding shaft 201. It is slidably installed on the periphery of the torsion shaft 201 in the axial direction; the second clutch disc 208 is fixedly installed on the left end of the torsion transmission shaft 207; the second clutch disc 208 is meshed with the first clutch disc 204; the fifth gear 206 is fixedly installed on the periphery of the torsion transmission shaft 207; the fifth gear 206 also forms a gear rack pair with the pulling rack 113; the torsion transmission shaft 207 is fixedly installed on the output end of the motor 205 along the axial direction; the motor 205 is fixedly installed inside the force base 102.

[0032] like Figure 5 As shown, in the torsion shaft 201, the left end of the shift shaft 209 is fixedly connected to the right end of the first gear 101; the left end of the connecting shaft 212 is fixedly installed on the right end of the shift shaft 209; the right end of the shift shaft 209 is fixedly connected to the left end of the second clutch plate 208; the shift shaft 209 is provided with a shift groove 211 along the axial direction; and the shift shaft 209 is provided with a shift socket 210 along the radial direction.

[0033] like Figure 6 As shown, in the shift assembly 202, the spring pin 213 is slidably installed in the shift slide 214 along the radial direction; the spring pin 213 is also fixedly connected to the inside of the shift slide 214 through a spring; the shift slide 214 is fixedly installed on the left side of the shift plate 215; the shift slide 214 is also slidably installed in the inside of the shift slide 211 along the axial direction of the shift slide 211; the shift plate 215 is slidably installed on the periphery of the connecting shaft 212 along the axial direction of the connecting shaft 212; the right end of the shift plate 215 is also fixedly connected to the left end of the torsion spring 203.

[0034] like Figure 7 and Figure 8 As shown, in the clamping device 3, the clamping base 301 is rotatably connected to the upper end of the first slider 104 and the upper end of the second slider 108; the clamping pull rod 302 is slidably installed on the clamping inner shell 310 and the clamping sleeve 314 along the axial direction; the lower end of the clamping pull rod 302 is fixedly connected to the outer cylindrical surface of the cone head sliding shaft 315; the clamping outer shell 303 is fixedly installed on the side of the clamping base 301; the clamping turntable 305 is rotatably connected to the upper end of the clamping outer shell 303; the two ends of the third connecting rod 304 are respectively hinged to the upper end of the clamping pull rod 302 and the upper surface of the clamping turntable 305; the two ends of the fourth connecting rod 306 are respectively hinged to the upper end of the clamping ball 308 and the upper surface of the clamping turntable 305; the octagonal plug 307 is slidably installed on the clamping turntable 305 and the clamping Inside the outer shell 303; the internal thread on the clamping ball 308 and the external thread on the clamping screw 309 form a thread pair; the clamping screw 309 is rotatably connected to the inner cylindrical surface of the clamping outer shell 303; a crescent protrusion 311 is provided on the inner cylindrical surface of the clamping screw 309; the crescent protrusion 311 is in frictional contact with the first elastic pressure block 312; the clamping inner shell 310 is fixedly installed on the side of the clamping base 301; the first elastic pressure block 312 is slidably installed on the clamping inner shell 310 along the radial direction of the clamping inner shell 310; the second elastic pressure block 313 is slidably installed on the clamping sleeve 314 along the radial direction of the clamping sleeve 314; the cone head sliding shaft 315 is slidably installed inside the clamping sleeve 314 along the axial direction; the outer periphery of the cone head sliding shaft 315 is in frictional contact with the second elastic pressure block 313.

[0035] like Fig. 9 As shown, in the forming component 5, the forming pressure head 501 is fixedly installed at the front end of the forming slider 503; the front end of the forming pressure head 501 is in friction contact with the outer cylindrical surface of the elastic sleeve 116; the upper surface of the forming slider 503 is fixedly connected to the lower end of the pulling connecting frame 115 by bolts; the lower end of the forming slider 503 is also provided with a forming slide groove 502; the forming slide groove 502 is slidably installed on the upper surface of the force base 102; the forming rack 504 is fixedly installed at the lower end of the forming slider 503; the forming rack 504 and the third gear 110 constitute a gear rack pair.

[0036] Working principle of the present invention: Figure 1 The usage and corresponding scenarios of the present invention are given. The posture control of the aluminum tube clamping and bending process is determined by the force-applying device 1, the twisting device 2 and the clamping device 3. The posture of the force-applying device 1 is determined by the twisting device 2, and the posture of the twisting device 2 is determined by the clamping device 3. Therefore, the clamping device 3 is the core of the aluminum tube clamping and bending process.

[0037] Taking the preferred embodiment as an example, the aluminum pipe 4 is first inserted into the elastic sleeve 116 of the pulling assembly 106, and then the aluminum pipe 4 is slid to the left so that the left end of the aluminum pipe 4 is inserted between the clamping sleeve 314 and the clamping inner shell 310 in the clamping device 3, and then the position of the aluminum pipe 4 is adjusted to the right so that the right end of the aluminum pipe 4 is inserted between the clamping sleeve 314 and the clamping inner shell 310, and then the clamping turntable 305 is manually rotated, and the clamping turntable 305 drives the cone head sliding shaft 315 and the clamping ball 308 to slide toward each other through the third connecting rod 304 and the fourth connecting rod 306 respectively, and the outer periphery of the cone head sliding shaft 315 drives the second elastic pressing block 313 to extend outward, so that the second The elastic pressing block 313 contacts the inner wall of the aluminum pipe 4, and the clamping ball 308 drives the first elastic pressing block 312 to extend inward through the crescent protrusion 311 on the clamping screw 309, so that the first elastic pressing block 312 contacts the outer wall of the aluminum pipe 4, thereby realizing the synchronous clamping function of the inner wall and the outer wall of the aluminum pipe 4; the shifting assembly 202 on the manual sliding torque adding device 2 causes the torsion spring 203 to change the elastic force of the first clutch disc 204, thereby changing the pre-compression force between the first clutch disc 204 and the second clutch disc 208, and further changing the maximum torque that can be transmitted between the first clutch disc 204 and the second clutch disc 208, thereby realizing the adjustment function of the transmitted torque ; Then, the torsion shaft 201 drives the first gear 101 to rotate, and the first gear 101 drives the first lead screw 109 and the second lead screw 111 to rotate synchronously through the second gear 103 and the fourth gear 112, and the first lead screw 109 and the second lead screw 111 respectively drive the second slider 108 and the first slider 104 to slide toward each other, and the second slider 108 and the first slider 104 drive the two ends of the aluminum pipe 4 to bend inward through the clamping device 3. At the same time, the first lead screw 109 also drives the forming rack 504 of the forming assembly 5 to extend forward through the third gear 110, so that the forming pressure head 501 at the front end of the forming slider 503 further applies pressure to the bending part of the aluminum pipe 4, so as to achieve the aluminum The multi-point force application function of the pipe fitting 4; when the forming slider 503 extends forward, the first slider 104 drives the pulling slide 114 on the pulling assembly 106 to slide horizontally through the first connecting rod 105, and the pulling slide 114 ensures that the second slider 108 slides synchronously with the first slider 104 through the second connecting rod 107. The pulling slide 114 drives the forming slider 503 of the forming assembly 5 to slide forward through the pulling connecting frame 115 to ensure the synchronous sliding of the forming slider 503, the first slider 104 and the second slider 108. At the same time, the pulling connecting frame 115 further applies pulling force to the bending part of the aluminum pipe fitting 4 through the elastic sleeve 116 to assist the bending of the aluminum pipe fitting 4.

[0038] Specifically, Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Fig. 9As shown, first, the bolts between the pulling rack 113 and the pulling slide 114 are loosened, so that the pulling rack 113 can slide freely at the lower end of the pulling slide 114, and then the spring pin 213 on the shift slide 214 is manually pressed to disengage the spring pin 213 from the shift socket 210 on the shift shaft 209, and then the shift plate 215 on the shift assembly 202 is manually driven to slide horizontally on the connecting shaft 212 of the torsion shaft 201. At this time, the shift slide 214 will also slide to the right in the shift slide groove 211, and the shift plate 215 drives the torsion spring 203 to be compressed to the right, so that the elastic force of the torsion spring 203 on the first clutch plate 204 is increased, thereby increasing the first clutch plate 204 and the second clutch. The pre-compression force between the first clutch disc 204 and the second clutch disc 208 further changes the maximum torque that can be transmitted between the first clutch disc 204 and the second clutch disc 208, thereby realizing the adjustment function of the transmitted torque; when the torque transmitted by the first clutch disc 204 and the second clutch disc 208 exceeds the preset torque, the left end of the second clutch disc 208 will compress the first clutch disc 204 to the left, so that the first clutch disc 204 and the second clutch disc 208 are out of contact, thereby realizing the overload disengagement function; the motor 205 drives the first clutch disc 204 and the second clutch disc 208 to rotate through the torque transmission shaft 207, the first clutch disc 204 drives the shift shaft 209 to rotate through the connecting shaft 212, and the shift shaft 209 drives the first gear 101 to rotate The first gear 101 drives the first lead screw 109 and the second lead screw 111 to rotate synchronously through the second gear 103 and the fourth gear 112, and the first lead screw 109 and the second lead screw 111 respectively drive the second slider 108 and the first slider 104 to slide toward each other, and the second slider 108 and the first slider 104 drive the two ends of the aluminum pipe 4 to bend inward through the clamping device 3. At the same time, the first lead screw 109 also drives the forming slider 503 and the forming slide groove 502 to extend toward the direction of the aluminum pipe 4 at the upper end of the force-applying base 102 through the third gear 110 and the forming rack 504, so that the forming pressure head 501 at the front end of the forming slider 503 further applies pressure to the bending part of the aluminum pipe 4, so as to achieve The aluminum tube 4 has a multi-point force application function. After the bending is completed, the bolts between the pulling connection frame 115 and the forming slider 503 are loosened, so that the pulling connection frame 115 and the pulling slider 114 can slide independently. When the clamping device 3 loosens the two ends of the aluminum tube 4, the pulling slider 114 is manually pulled, so that the pulling connection frame 115 drives the aluminum tube 4 to detach from the clamping device 3 through the elastic sleeve 116. The sliding distance between the second slider 108 and the first slider 104 can directly control the bending angle of the aluminum tube. The aluminum tube can be formed once with the pre-set bending angle. When the aluminum tube cannot be bent once, the two ends of the aluminum tube can be inserted into the clamping device 3 again for bending again.When the forming slider 503 extends toward the aluminum tube 4, the first slider 104 drives the pulling slide 114 on the pulling assembly 106 to slide horizontally through the first connecting rod 105, and the pulling slide 114 ensures that the second slider 108 slides synchronously with the first slider 104 through the second connecting rod 107. The pulling slide 114 also drives the forming slider 503 to extend toward the aluminum tube 4 through the pulling connecting frame 115 to ensure that the forming slider 503, the first slider 104 and the second slider 108 are connected. Synchronous sliding; manually tighten the bolts between the pulling rack 113 and the pulling slide 114, at this time, the motor 205 drives the fifth gear 206 to rotate through the torsion transmission shaft 207, and the fifth gear 206 drives the pulling slide 114 to slide horizontally through the pulling rack 113, and the pulling connecting frame 115 further applies tension to the bending part of the aluminum pipe 4 through the elastic sleeve 116 to assist the bending of the aluminum pipe 4, and at the same time, it can skip the torque restriction between the first clutch disc 204 and the second clutch disc 208. ;

[0039] like Figure 7 and Figure 8 As shown, the aluminum pipe fitting 4 is first inserted into the elastic sleeve 116 of the pulling assembly 106, and then the aluminum pipe fitting 4 is manually slid to the left so that the left end of the aluminum pipe fitting 4 is inserted between the clamping sleeve 314 and the clamping inner shell 310, and then the position of the aluminum pipe fitting 4 is adjusted to the right so that the right end of the aluminum pipe fitting 4 is inserted between the clamping sleeve 314 and the clamping inner shell 310 on the side of the clamping base 301, and then the clamping turntable 305 at the upper end of the clamping outer shell 303 is manually rotated, and the clamping turntable 305 drives the cone head sliding shaft 315 to move toward the center direction of the aluminum pipe fitting 4 through the third connecting rod 304 and the clamping pull rod 302, and the clamping turntable 305 also drives the clamping through the fourth connecting rod 306 The holding ball 308 moves toward the center direction of the aluminum pipe fitting 4, and the conical surface of the cone head sliding shaft 315 will drive the second elastic pressure block 313 to extend outward on the clamping sleeve 314, so that the second elastic pressure block 313 contacts the inner wall of the aluminum pipe fitting 4, and the clamping ball 308 drives the clamping screw 309 to rotate, and the clamping screw 309 drives the first elastic pressure block 312 to extend inward through the crescent protrusion 311, so that the first elastic pressure block 312 contacts the outer wall of the aluminum pipe fitting 4, and then the octagonal column 307 is manually inserted into the clamping turntable 305 and the clamping shell 303, so that the clamping turntable 305 cannot continue to rotate, thereby realizing the synchronous clamping function of the inner and outer walls of the aluminum pipe fitting 4.

[0040] The present invention is not limited to the above-mentioned specific implementation modes. Various changes made by technicians in the relevant technical field based on the above-mentioned conception without creative work all fall within the protection scope of the present invention.

Claims

1. A clamp for bending an aluminum tube, comprising a force applying device (1), a twisting device (2), a clamping device (3), an aluminum tube (4), and a forming component (5), characterized in that: The force applying device (1) is provided with a force applying base (102), a first slider (104), a second slider (108), a first lead screw (109), a third gear (110), and a second lead screw (111); the first slider (104) is slidably mounted on the upper end of the force applying base (102) in a horizontal direction; the second slider (108) is slidably mounted on the upper end of the force applying base (102) in a horizontal direction; the right end of the first lead screw (109) is rotatably connected to the force applying base (102) The left end of the first lead screw (109) is fixedly connected to the right end of the third gear (110); the external thread on the first lead screw (109) also forms a thread pair with the internal thread on the second slider (108); the left end of the second lead screw (111) is rotatably connected to the force application base (102); the right end of the second lead screw (111) is fixedly connected to the left end of the third gear (110); the external thread on the second lead screw (111) also forms a thread pair with the internal thread on the first slider (104) The first lead screw (109) and the second lead screw (111) respectively drive the second slider (108) and the first slider (104) to slide inwards, the second slider (108) and the first slider (104) drive the aluminum pipe (4) to bend via the clamping device (3), the first lead screw (109) also drives the forming component (5) to extend forward via the third gear (110), and the forming component (5) applies pressure to the bending part to achieve a multi-point force application function on the aluminum pipe (4); a twisting device (2) is fixedly mounted inside the force-applying base (102); the two clamping devices (3) are rotatably connected to the upper end of the first slider (104) and the upper end of the second slider (108) respectively; the aluminum pipe (4) is slidably mounted in the clamping device (3) along the axial direction of the clamping device (3); the forming component (5) is slidably mounted on the upper end of the force-applying base (102) along the radial direction of the aluminum pipe (4); the forming component (5) also forms a gear rack pair with the third gear (110).

2. The aluminum tube bending fixture according to claim 1, characterized in that: The force applying device (1) further comprises a first gear (101), a second gear (103), a first connecting rod (105), a pulling assembly (106), a second connecting rod (107), and a fourth gear (112); the first gear (101) is rotatably connected to the left side of the force applying base (102); the first gear (101) is also fixedly mounted on the left side of the twisting device (2) along the axial direction of the twisting device (2); the second gear (103) is rotatably connected to the left side of the force applying base (102); The second gear (103) and the first gear (101) form a gear pair; the two ends of the first connecting rod (105) are respectively hinged to the upper end of the first slider (104) and the upper end of the pulling assembly (106); the two ends of the second connecting rod (107) are respectively hinged to the upper end of the second slider (108) and the upper end of the pulling assembly (106); the fourth gear (112) is fixedly mounted on the left end of the second lead screw (111); the fourth gear (112) and the second gear (103) also form a threaded pair.

3. The aluminum tube bending fixture according to claim 2, characterized in that: The pulling assembly (106) comprises a pulling rack (113), a pulling slide (114), a pulling connection frame (115), and an elastic sleeve (116); the pulling rack (113) is slidably mounted on the lower end of the pulling slide (114) along the radial direction of the aluminum pipe (4); the pulling rack (113) is also fixedly connected to the pulling slide (114) by bolts; the pulling slide (114) is slidably mounted on the lower end of the force applying base (102) along the radial direction of the aluminum pipe (4). The upper end of the pulling slide (114) is rotatably connected to the first connecting rod (105) and the second connecting rod (107) respectively; the pulling connecting frame (115) is fixedly mounted on the upper end of the pulling slide (114); the pulling connecting frame (115) is also fixedly connected to the forming component (5) via bolts; the elastic sleeve (116) is fixedly mounted on the side of the pulling connecting frame (115); the elastic sleeve (116) is slidably connected to the outer cylindrical surface of the aluminum pipe (4) along the axial direction.

4. The aluminum tube bending fixture according to claim 3, characterized in that: The torque adding device (2) comprises a torque adding shaft (201), a gear shifting assembly (202), a torque adding spring (203), a first clutch plate (204), a motor (205), a fifth gear (206), a torque adding transmission shaft (207), and a second clutch plate (208); the left end of the torque adding shaft (201) is fixedly connected to the right end of the first gear (101); the right end of the torque adding shaft (201) is fixedly connected to the left end of the second clutch plate (208); the gear shifting assembly (202) is slidably mounted on the periphery of the torque adding shaft (201) along the axial direction of the torque adding shaft (201); the torque adding spring (203) is fixedly mounted on the right end of the gear shifting assembly (202) along the axial direction; the fifth gear (206) is fixedly mounted on the right end of the gear shifting assembly (202) along the axial direction; A clutch disc (204) is fixedly mounted on the right end of the torsion spring (203); the first clutch disc (204) is also slidably mounted on the periphery of the torsion shaft (201) along the axial direction; the second clutch disc (208) is fixedly mounted on the left end of the torsion transmission shaft (207); the second clutch disc (208) is meshed with the first clutch disc (204); the fifth gear (206) is fixedly mounted on the periphery of the torsion transmission shaft (207); the fifth gear (206) and the pulling rack (113) form a gear rack pair; the torsion transmission shaft (207) is fixedly mounted on the output end of the motor (205) along the axial direction; and the motor (205) is fixedly mounted inside the force base (102).

5. The aluminum tube bending fixture according to claim 4, characterized in that: The torsion-adding shaft (201) comprises a shift shaft (209), a shift socket (210), a shift slide groove (211), and a connecting shaft (212); the left end of the shift shaft (209) is fixedly connected to the right end of the first gear (101); the left end of the connecting shaft (212) is fixedly mounted on the right end of the shift shaft (209); the right end of the shift shaft (209) is fixedly connected to the left end of the second clutch plate (208); the shift shaft (209) is provided with a shift slide groove (211) along the axial direction; and the shift shaft (209) is provided with a shift socket (210) along the radial direction.

6. The aluminum tube bending fixture according to claim 5, characterized in that: The shift assembly (202) comprises a spring pin (213), a shift slide column (214), and a shift plate (215); the spring pin (213) is slidably mounted in the shift slide column (214) along a radial direction; the spring pin (213) is also fixedly connected to the inside of the shift slide column (214) through a spring; the shift slide column (214) is fixedly mounted on the left side of the shift plate (215); the shift slide column (214) is also slidably mounted inside the shift slide groove (211) along the axial direction of the shift slide groove (211); the shift plate (215) is slidably mounted on the periphery of the connecting shaft (212) along the axial direction of the connecting shaft (212); and the right end of the shift plate (215) is also fixedly connected to the left end of the torsion spring (203).

7. The aluminum tube bending fixture according to claim 6, characterized in that: The clamping device (3) comprises a clamping base (301), a clamping pull rod (302), a clamping outer shell (303), a third connecting rod (304), a clamping turntable (305), a fourth connecting rod (306), an octagonal plug column (307), a clamping ball (308), a clamping screw (309), a clamping inner shell (310), a crescent lug (311), a first elastic pressing block (312), a second elastic pressing block (313), a clamping sleeve (314), and a cone head sliding shaft (315); the clamping base (301) is rotatably connected to the first sliding block (104) The upper end of the clamping rod (302) and the upper end of the second slider (108); the clamping rod (302) is slidably mounted on the clamping inner shell (310) and the clamping sleeve (314) along the axial direction; the lower end of the clamping rod (302) is fixedly connected to the outer cylindrical surface of the cone head sliding shaft (315); the clamping outer shell (303) is fixedly mounted on the side of the clamping base (301); the clamping turntable (305) is rotatably connected to the upper end of the clamping outer shell (303); the two ends of the third connecting rod (304) are respectively hinged to the upper end of the clamping rod (302) and the upper surface of the clamping turntable (305); The two ends of the four-link rod (306) are respectively hinged to the upper end of the clamping ball (308) and the upper surface of the clamping turntable (305); the octagonal plug column (307) is slidably installed in the clamping turntable (305) and the clamping shell (303) along the vertical direction; the internal thread on the clamping ball (308) and the external thread on the clamping screw (309) form a thread pair; the clamping screw (309) is rotatably connected to the inner cylindrical surface of the clamping shell (303); a crescent lug (311) is provided on the inner cylindrical surface of the clamping screw (309); the crescent lug (311) and the clamping screw (309) are connected to each other. The first elastic pressure block (312) is in frictional contact; the clamping inner shell (310) is fixedly mounted on the side of the clamping base (301); the first elastic pressure block (312) is slidably mounted on the clamping inner shell (310) along the radial direction of the clamping inner shell (310); the second elastic pressure block (313) is slidably mounted on the clamping sleeve (314) along the radial direction of the clamping sleeve (314); the cone head sliding shaft (315) is slidably mounted inside the clamping sleeve (314) along the axial direction; the outer periphery of the cone head sliding shaft (315) is in frictional contact with the second elastic pressure block (313).

8. The aluminum tube bending fixture according to claim 7, characterized in that: The forming assembly (5) comprises a forming pressure head (501), a forming slide groove (502), a forming slider (503), and a forming rack (504); the forming pressure head (501) is fixedly mounted on the front end of the forming slider (503); the front end of the forming pressure head (501) is in frictional contact with the outer cylindrical surface of the elastic sleeve (116); the upper surface of the forming slider (503) is fixedly connected to the lower end of the pulling connection frame (115) by bolts; the lower end of the forming slider (503) is also provided with a forming slide groove (502); the forming slide groove (502) is slidably mounted on the upper surface of the force-applying base (102); the forming rack (504) is fixedly mounted on the lower end of the forming slider (503); the forming rack (504) and the third gear (110) form a gear rack pair.

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