Male and female combined pneumatic clamp for machining

Abstract

The invention relates to a male and female combined pneumatic clamp for machining, and relates to the field of machining clamps, the male and female combined pneumatic clamp for machining comprises a base seat, a plurality of chucks, a clamp plate, a plurality of blind rivets, a clamp mechanism and a connecting mechanism, the connecting mechanism comprises linkage clamping assemblies, and each chuck corresponds to two linkage clamping assemblies; the two linkage clamping assemblies are located on the two opposite sides of the chuck correspondingly. And the opposite threaded sections of the bidirectional lead screw are connected with lead screw nuts, the two lead screw nuts are connected with the input ends of the two linkage clamping assemblies correspondingly, and the output ends of the linkage clamping assemblies penetrate through the side wall of the chuck and are matched with the sunken parts of the blind rivets. After a workpiece is machined on a certain machine tool, the clamp plate is taken down from the foundation base and installed on the foundation base of the next machine tool so that the workpiece can be rapidly replaced on different machine tools, and due to the fact that the bidirectional lead screw and the lead screw nut are arranged, the stability of long-time operation is provided through the self-locking performance of threads.

Description

Technical Field

[0001] The present application relates to the field of machining fixtures, and in particular to a male and female combined pneumatic fixture for machining. Background Art

[0002] At present, there are many types of fixtures widely used in the machining industry, mainly including manual fixtures, hydraulic fixtures and traditional pneumatic fixtures. Although these fixtures can meet the basic clamping functions, they often have problems such as cumbersome operation and low efficiency when facing high-precision requirements and mass production needs. With the continuous improvement of industrial automation, improving processing efficiency and ensuring processing accuracy have become a common pursuit in the industry, especially in the fields of automobile manufacturing, aerospace, etc., which have extremely strict requirements on processing quality and speed.

[0003] The common manual clamps on the market are usually composed of bolts, pressure plates, etc. Although they are low-cost and easy to make, they are time-consuming to operate and it is difficult to ensure that the clamping position is consistent each time; hydraulic clamps use the hydraulic system to generate strong clamping force and are suitable for the processing of heavy parts, but due to the high complexity of the equipment, they are difficult to maintain and costly; although traditional pneumatic clamps have certain automation characteristics, they still face the problem of insufficient positioning accuracy.

[0004] Regarding the above-mentioned related technologies, although the existing pneumatic or hydraulic systems can provide a large clamping force, they ignore the key factor of long-term operation stability. Summary of the invention

[0005] In order to provide a large clamping force in a long-term and stable manner, the present application provides a male and female combined pneumatic clamp for machining.

[0006] The present application provides a male and female combined pneumatic clamp for machining, which adopts the following technical solution: A male and female combined pneumatic clamp for machining, comprising: a base, a plurality of chucks arranged on the base, a fixture plate located on the base, a plurality of rivets arranged on the fixture plate and plugged with the chucks, a fixture mechanism arranged on the fixture plate, and a connecting mechanism arranged in the base and connecting the rivets and the chucks, wherein the connecting mechanism comprises: The linkage clamping assembly is arranged in the base seat, and each chuck corresponds to two groups of linkage clamping assemblies, and the two groups of linkage clamping assemblies are respectively located on two opposite sides of the chuck; A bidirectional lead screw is rotatably arranged in the base seat, and lead screw nuts are connected to opposite threaded sections of the bidirectional lead screw, and the two lead screw nuts are respectively connected to the input ends of two sets of linkage clamping assemblies, and the output end of the linkage clamping assembly penetrates the side wall of the chuck and cooperates with the recessed portion of the rivet; The driving assembly is arranged in the base and is used to drive the bidirectional lead screw to rotate.

[0007] By adopting the above technical solution, when it is necessary to realize the connection between the base seat and the clamp plate, the clamp plate is placed downward so that the two pull pins are respectively inserted into the two chucks, and then the two lead screw nuts are driven close to each other through the driving assembly, so that the lead screw nuts control the input ends of the corresponding two groups of linkage clamping assemblies, so that the output ends of the linkage clamping assemblies pass through the side walls of the chucks and abut against the recessed parts of the pull pins to realize a stable connection between the base seat and the clamp plate; since the present application provides a bidirectional lead screw and lead screw nut, the self-locking property of the thread is used to provide stability for long-term operation.

[0008] Optionally, the linkage clamping assembly includes a middle slide rail arranged in the base seat, a linkage block slidably connected to the middle slide rail, a top slide rail arranged in the base seat, a top slider slidably connected to the top slide rail, a bottom slide rail arranged in the base seat, a bottom slider slidably connected to the bottom slide rail, a main latch arranged at one end of the top slider and passing through the side wall of the chuck, a first linkage clamping component arranged at one end of the linkage block and cooperating with the recessed portion of the rivet, and a second linkage clamping component arranged at the other end of the linkage block and cooperating with the recessed portion of the rivet, The two sides of the lead screw nut are respectively connected to the bottom slider through connecting rods, and the end of the linkage block close to the bottom slider is provided with an inclined groove, and the end of the bottom slider close to the linkage block is provided with a bottom limit block slidably connected to the inclined groove, and the end of the linkage block close to the top slider is provided with a V-shaped groove, and the end of the top slider close to the linkage block is provided with a top limit block slidably connected to the V-shaped groove, and the starting part of the V-shaped groove is directed to a position away from the chuck, and when the top limit block moves to the two ends in the V-shaped groove, the main pin is inserted into the chuck.

[0009] By adopting the above technical solution, when it is necessary to insert the main pin into the chuck, the bidirectional lead screw is driven to rotate through the driving assembly to push the bottom slider to move in the bottom slide rail, so that the bottom limit block can drive the linkage block to move toward the position close to the bidirectional lead screw during the movement of the bottom limit block in the inclined groove, so that the top limit block can drive the top slider to move in the direction close to the chuck during the movement of the top limit block in the V-shaped groove, and finally inserted into the main socket of the chuck, so that the main pin is tightly fitted with the recessed part of the rivet.

[0010] Optionally, the first linkage clamping component includes a first fixed cylinder arranged in a base seat, a first pin slidably arranged in the first fixed cylinder, a first linkage rod arranged between one ends of linkage blocks of two sets of linkage clamping assemblies, and a first contact block arranged at one end of the first pin close to the first linkage rod, the first pin passes through the inner wall of the chuck and cooperates with the recessed portion of the rivet, the first contact block extends out of the first fixed cylinder, and the first linkage rod cooperates with the first contact block to press the first pin.

[0011] By adopting the above technical solution, when the bottom limit block drives the linkage block to move closer to the bidirectional lead screw, the first linkage rod will contact and push the first contact block, thereby inserting the first pin into the first socket and tightly fitting with the recessed portion of the rivet. At the same time, the two main pins also tightly fit with the recessed portions of the rivet respectively to achieve multi-point tightening, thereby improving the connection stability between the rivet and the chuck.

[0012] Optionally, a first spring is provided between the first fixing tube and the first contact block, the first spring is used to push the first latch pin to be inserted into the chuck, and the bottom of the rivet is in the shape of a truncated cone that is wide at the top and narrow at the bottom.

[0013] By adopting the above technical solution, when the rivet is inserted downward into the chuck, the first pin inserted into the chuck will be pushed out first due to the truncated cone-shaped bottom of the rivet. When the rivet is fully inserted into the chuck, the first pin is pushed to cooperate with the recessed part of the rivet under the drive of the first spring, thereby playing a role of pre-positioning the rivet.

[0014] Optionally, the second linkage clamping component includes a second linkage rod arranged between the other ends of the linkage blocks of the two groups of linkage clamping assemblies, a lower linkage rack arranged on the second linkage rod, a linkage gear rotatably arranged in the base seat and meshed with the top of the lower linkage rack, a second fixed cylinder arranged in the base seat, a second slider slidably connected in the second fixed cylinder, an upper linkage rack arranged at the bottom of the second slider and meshed with the top of the linkage gear, and a second pin arranged at one end of the second slider and passing through the side wall of the chuck, the second pin cooperating with the recessed portion of the rivet.

[0015] By adopting the above technical solution, when the linkage block moves toward the bidirectional lead screw, the lower linkage rack will drive the linkage gear to rotate, thereby driving the upper linkage rack to move through the linkage gear, and the movement direction of the lower linkage rack is opposite to that of the upper linkage rack, so that the upper linkage rack drives the second slider and the second pin to move toward the chuck, so that the second pin is inserted into the second socket and tightly fits with the recessed part of the rivet.

[0016] Optionally, elastic abutments are slidably provided in the base seat and on both sides of the bidirectional lead screw, one end of the abutment is connected to one end of the lower linkage rack, and the abutment cooperates with the smooth portion of the bidirectional lead screw.

[0017] By adopting the above technical solution, when the lower linkage rack of the second linkage component moves toward the direction close to the bidirectional lead screw, it will simultaneously drive the clamping member to approach the bidirectional lead screw. The end of the clamping member away from the lower linkage rack contacts the smooth part of the bidirectional lead screw and presses against the smooth part of the bidirectional lead screw with a certain force, thereby limiting the rotation of the bidirectional lead screw to a certain extent.

[0018] Optionally, the ends of the main pin, the first pin and the second pin close to the chuck are all arc-shaped and match with the arc surface of the rivet recess.

[0019] By adopting the above technical solution, the contact area with the rivet recess can be increased, so as to improve the connection stability between the rivet recess and the main pin, the first pin and the second pin respectively.

[0020] Optionally, the chuck side wall is provided with two symmetrically arranged main sockets, the two main pins are respectively plugged into the two main sockets, the chuck side wall is provided with a first socket for inserting the first pin, and the chuck side wall is provided with a second socket for inserting the second pin.

[0021] By adopting the above technical solution, a limiting effect can be provided for the movement of the main latch, the first latch and the second latch to improve stability.

[0022] Optionally, the driving assembly includes a driving member arranged in the base, a driving bevel gear arranged at the output end of the driving member, and a driven bevel gear arranged on the bidirectional lead screw and meshing with the driving bevel gear.

[0023] By adopting the above technical solution, the output end of the driving member drives the active bevel gear to rotate, so that the bidirectional lead screw can be driven to rotate through the driven bevel gear to adjust the position of the lead screw nut.

[0024] Optionally, a guide groove is provided on the inner wall of the base seat, a guide block is slidably arranged in the guide groove, and the guide block is connected to the lead screw nut.

[0025] By adopting the above technical solution, a certain guiding effect can be exerted on the lead screw nut, so as to improve the stability of the lead screw nut when moving.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. When it is necessary to realize the connection between the base and the fixture plate, the fixture plate is placed downward, so that the two rivets are respectively inserted into the two chucks, and then the two lead screw nuts are driven to approach each other through the driving assembly, so that the lead screw nuts control the input ends of the corresponding two sets of linkage clamping assemblies, so that the output ends of the linkage clamping assemblies penetrate the side walls of the chucks and abut against the recessed parts of the rivets to realize a stable connection between the base and the fixture plate; since the present application is provided with a bidirectional lead screw and lead screw nut, the self-locking property of the thread is used to provide stability for long-term operation; 2. When the main latch needs to be inserted into the chuck, the driving assembly drives the bidirectional lead screw to rotate to push the bottom slider to move in the bottom slide rail, so that the bottom limit block can drive the linkage block to move close to the bidirectional lead screw during the movement of the inclined groove, so that the top limit block can drive the top slider to move in the direction close to the chuck during the movement of the V-shaped groove, and finally insert it into the main socket of the chuck, so that the main latch and the concave part of the rivet are tightly matched; 3. When the rivet is inserted downward into the chuck, the first pin inserted into the chuck will be pushed out first because the bottom of the rivet is in the shape of a cone. When the rivet is fully inserted into the chuck, the first pin is pushed to cooperate with the recessed part of the rivet under the drive of the first spring, thereby playing a role in pre-positioning the rivet. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of a male and female combined pneumatic clamp for machining; Figure 2 It is a schematic diagram of the structure of the separation of the chuck and the rivet of the male and female combined pneumatic clamp for machining; Figure 3 It is a schematic diagram of the side section structure of a male and female combined pneumatic clamp for machining; Figure 4 It is a schematic diagram of the top section structure of a male and female combined pneumatic clamp for machining; Figure 5 It is a structural schematic diagram of the connection mechanism of the male and female combined pneumatic clamp for machining; Figure 6 It is a structural schematic diagram of the linkage clamping assembly of the male and female combined pneumatic clamp for machining; Figure 7 It is a first exploded structural schematic diagram of a linkage clamping assembly of a male and female combined pneumatic clamp for machining; Figure 8 It is a second exploded structural schematic diagram of a linkage clamping assembly of a male and female combined pneumatic clamp for machining.

[0028] Description of the accompanying drawings: 1. base; 11. chuck; 111. main socket; 112. first socket; 113. second socket; 12. guide block; 13. fastening member; 2. fixture plate; 21. rivet; 3. fixture mechanism; 4. connecting mechanism; 41. linkage clamping assembly; 411. middle slide rail; 412. linkage block; 4121. inclined groove; 4122. V-shaped groove; 413. top slide rail; 414. top slider; 4141. top limit block; 415. bottom slide rail; 416. bottom slider; 4161. bottom limit block; 417. main latch; 418. first A linkage clamping component; 4181, a first fixed cylinder; 4182, a first latch; 4183, a first linkage rod; 4184, a first contact block; 4185, a first spring; 419, a second linkage clamping component; 4191, a second linkage rod; 4192, a lower linkage rack; 4193, a linkage gear; 4194, a second fixed cylinder; 4195, a second slider; 4196, an upper linkage rack; 4197, a second latch; 42, a bidirectional lead screw; 421, a lead screw nut; 43, a driving assembly; 431, a driving member; 432, an active bevel gear; 433, a driven bevel gear. DETAILED DESCRIPTION

[0029] The following is combined with Figures 1 to 8 This application is described in further detail.

[0030] The present application discloses a male and female combined pneumatic clamp for machining. Figure 1 and Figure 2 The male and female combined pneumatic clamp for machining includes a base 1, a plurality of chucks 11, a fixture plate 2, a plurality of rivets 21, a fixture mechanism 3 and a connecting mechanism 4. The interior of the base 1 is a cavity, a plurality of chucks 11 are installed on the top of the base 1, and the chucks 11 extend into the cavity of the base 1. The fixture plate 2 is located at the top of the base 1. A plurality of rivets 21 are fixedly connected to the bottom of the fixture plate 2, and the rivets 21 are plugged into the chucks 11. The connecting mechanism 4 is installed in the cavity of the base 1, and the connecting mechanism 4 is used to clamp the rivets 21 and the chucks 11 to achieve a stable connection between the base 1 and the fixture plate 2. The fixture mechanism 3 is installed on the top of the fixture plate 2, and the fixture mechanism 3 is used to clamp the workpiece to be processed, and the fixture mechanism 3 is a prior art and will not be described in detail here. In this embodiment, the number of chucks 11 and rivets 21 is two.

[0031] It should be noted that a workpiece may have to pass through machine tools for different processing operations successively. The base seat 1 of the present application is installed on multiple different machine tools that require processing operations. When the workpiece is processed on a certain machine tool, the fixture plate 2 is removed from the base seat 1 and installed on the base seat 1 of the next machine tool, thereby realizing the rapid replacement of workpieces on different machine tools.

[0032] Reference Figure 3 and Figure 4 Preferably, the connection mechanism 4 includes a linkage clamping assembly 41, a bidirectional lead screw 42 and a driving assembly 43. The linkage clamping assembly 41 is installed in the base 1. The number of linkage assemblies corresponding to each chuck 11 is two groups, and the two groups of linkage clamping assemblies 41 cooperating with the chuck 11 are respectively located on opposite sides of the chuck 11. The cross section of the base 1 is rectangular, the bidirectional lead screw 42 is horizontally rotatably connected in the base 1, the length direction of the bidirectional lead screw 42 is perpendicular to the length direction of the base 1, the bidirectional lead screw 42 is located between the two chucks 11, and the opposite threaded sections of the bidirectional lead screw 42 are connected with lead screw nuts 421. The two lead screw nuts 421 are respectively connected to the input ends of the two groups of linkage clamping assemblies 41 on the left and right sides thereof, so that one lead screw nut 421 can simultaneously control the input ends of the two groups of linkage clamping assemblies 41 located on the same side of the two chucks 11, and the output end of the linkage clamping assembly 41 passes through the side wall of the chuck 11 and can cooperate with the recessed portion of the rivet 21. The driving assembly 43 is installed in the base 1 and is used to drive the bidirectional lead screw 42 to rotate so as to adjust the positions of the two lead screw nuts 421 so that the two lead screw nuts 421 are moved closer to each other or farther away from each other.

[0033] When it is necessary to realize the connection between the base 1 and the fixture plate 2, the fixture plate 2 is placed downward so that the two rivets 21 are respectively inserted into the two chucks 11, and then the two lead screw nuts 421 are driven to approach each other through the driving assembly 43, so that the lead screw nuts 421 control the input ends of the corresponding two sets of linkage clamping assemblies 41, so that the output end of the linkage clamping assembly 41 passes through the side wall of the chuck 11 and abuts against the recessed part of the rivet 21 to realize the stable connection between the base 1 and the fixture plate 2; similarly, when it is necessary to realize the disassembly between the base 1 and the fixture plate 2, the two lead screw nuts 421 are driven away from each other through the driving assembly 43 so that the output end of the linkage clamping assembly 41 does not contact the rivet 21, and then the fixture plate 2 is taken out upward. It should be noted that since the bidirectional lead screw 42 and the lead screw nut 421 are provided in the present application, the stability of long-term operation is provided by the self-locking property of the thread.

[0034] Reference Figure 5 and Figure 6 Preferably, the driving assembly 43 includes a driving member 431, a driving bevel gear 432 and a driven bevel gear 433. The driving member 431 is installed in the inner cavity of the base 1, the driving bevel gear 432 is fixed to the output end of the driving member 431, and the driven bevel gear 433 is fixed to the outside of the bidirectional lead screw 42, and the driving bevel gear 432 is meshed with the driven bevel gear 433. In this embodiment, the driving member 431 is a servo motor, and a brake is installed at the output end of the servo motor.

[0035] When the bidirectional lead screw 42 needs to be driven to rotate, the output end of the driving member 431 drives the active bevel gear 432 to rotate. Since the active bevel gear 432 is meshed with the driven bevel gear 433, the bidirectional lead screw 42 can be driven to rotate through the driven bevel gear 433 to adjust the position of the lead screw nut 421.

[0036] It should be noted that the inner cavity of the base 1 is provided with a guide groove, the length direction of which is parallel to the length direction of the bidirectional lead screw 42, a guide block 12 is slidably connected in the guide groove, and the guide block 12 is fixedly connected to the lead screw nut 421. Under the action of the guide block 12 and the guide groove, the lead screw nut 421 can be guided to a certain extent, so as to improve the stability of the lead screw nut 421 when it moves.

[0037] Reference Figure 7 and Figure 8 Furthermore, the linkage clamping assembly 41 includes a middle slide rail 411, a linkage block 412, a top slide rail 413, a top slider 414, a bottom slide rail 415, a bottom slider 416 and a main pin 417. The middle slide rail 411 is horizontally installed in the middle of the inner cavity of the base seat 1. The length direction of the middle slide rail 411 is perpendicular to the length direction of the bidirectional lead screw 42. The linkage block 412 is horizontally slidably connected to the inside of the middle slide rail 411. The top slide rail 413 is horizontally fixed to the top of the inner cavity of the base seat 1. The top slider 414 is horizontally slidably connected to the top slide rail 413. The bottom slide rail 415 is horizontally fixed to the bottom of the inner cavity of the base seat 1. The bottom slider 416 is horizontally slidably connected to the bottom slide rail 415. The length directions of the top slide rail 413 and the bottom slide rail 415 are parallel to the length direction of the bidirectional lead screw 42, and the linkage block 412 is located between the bottom slider 416 and the top slider 414. The main latch 417 is fixedly connected to one end of the top slider 414 close to the chuck 11, and main sockets 111 are provided on both sides of the side wall of the chuck 11 close to the main latch 417, and the main sockets 111 are used to insert the main latch 417. It should be noted that the upper and lower ends of the middle slide rail 411 are fixedly connected to the top slide rail 413 and the bottom slide rail 415 respectively.

[0038] Both sides of the lead screw nut 421 are connected to the bottom slider 416 through connecting rods, and an inclined groove 4121 is provided at one end of the linkage block 412 close to the bottom slider 416, and a bottom stopper 4161 is fixed at one end of the bottom slider 416 close to the linkage block 412, and the bottom stopper 4161 is slidably connected in the inclined groove 4121. A V-shaped groove 4122 is provided at one end of the linkage block 412 close to the top slider 414, and a top stopper 4141 is fixed at one end of the top slider 414 close to the linkage block 412, and the top stopper 4141 is slidably connected in the V-shaped groove 4122, and the starting portion of the V-shaped groove 4122 faces a position away from the chuck 11. It should be noted that the bottom slide rail 415 is provided with a movable groove for the connecting rod to move.

[0039] When the rivet 21 is just docked with the chuck 11, the top limit block 4141 is just located in the middle of the V-shaped groove 4122, and the bottom limit block 4161 is just located in the middle of the inclined groove 4121. At this time, the distance between the main pin 417 and the chuck 11 is the farthest. When it is necessary to insert the main pin 417 into the chuck 11, the bidirectional lead screw 42 is driven to rotate through the driving assembly 43, so that the two lead screw nuts 421 are close to each other, so as to push the bottom slider 416 to move in the bottom slide rail 415, so that the bottom limit block 4161 can drive the linkage block 412 to move to a position close to the bidirectional lead screw 42 during the movement of the inclined groove 4121 and under the limiting action of the middle slide rail 411, so that the top limit block 4141 can drive the top slider 414 to move in a direction close to the chuck 11 during the movement of the V-shaped groove 4122 and under the limiting action of the top slide rail 413, and finally inserted into the main socket 111 of the chuck 11, so that the main pin 417 is tightly fitted with the recessed part of the rivet 21.

[0040] Reference Figure 5 and Figure 6 The linkage clamping assembly 41 also includes a first linkage clamping component 418 and a second linkage clamping component 419. The first linkage clamping component 418 is installed at one end of the linkage block 412 and cooperates with the recessed portion of the rivet 21. The second linkage clamping component 419 is installed at the other end of the linkage block 412 and cooperates with the recessed portion of the rivet 21.

[0041] The first linkage clamping component 418 includes a first fixed cylinder 4181, a first pin 4182, a first linkage rod 4183 and a first contact block 4184. The first linkage rod 4183 is horizontally fixedly connected between one ends of the linkage blocks 412 of the linkage clamping assembly 41 located on opposite sides of the same chuck 11. The first linkage rod 4183 is located on the side of the chuck 11 away from the bidirectional screw 42. The first fixed cylinder 4181 is horizontally fixed to the top of the inner cavity of the base seat 1. The length direction of the first fixed cylinder 4181 is perpendicular to the length direction of the first linkage rod 4183. The first pin 4182 is slidably connected in the first fixed cylinder 4181. The first contact block 4184 is fixed to one end of the first pin 4182 close to the first linkage rod 4183. The first contact block 4184 extends out of the first fixed cylinder 4181. The first linkage rod 4183 contacts and cooperates with the first contact block 4184 to press the first pin 4182. The first latch pin 4182 passes through the inner wall of the chuck 11 and cooperates with the recessed portion of the rivet 21 . A first socket 112 is provided on the side wall of the chuck 11 near the first latch pin 4182 . The first socket 112 is for the first latch pin 4182 to be inserted into.

[0042] When the bottom limit block 4161 drives the linkage block 412 to move closer to the bidirectional screw 42, the linkage block 412 will simultaneously drive the first linkage rod 4183 to move closer to the chuck 11. The first linkage rod 4183 will contact and push the first contact block 4184 during the movement, thereby inserting the first pin 4182 into the first socket 112 and tightly fitting with the recessed portion of the rivet 21. At the same time, the two main pins 417 are also tightly fitted with the recessed portions of the rivet 21, respectively, to achieve multi-point tightening, thereby improving the connection stability between the rivet 21 and the chuck 11.

[0043] Preferably, a first spring 4185 is sleeved on the outer side of the main pin 417, and both ends of the first spring 4185 are respectively connected to the first fixed tube 4181 and the first contact block 4184, and the first spring 4185 is used to push the first pin 4182 into the chuck 11, and the bottom of the rivet 21 is a frustum that is wide at the top and narrow at the bottom.

[0044] Since the first spring 4185 is installed between the first fixed cylinder 4181 and the first contact block 4184, the first pin 4182 can be inserted into the first socket 112 of the chuck 11 under the elastic force of the first spring 4185. When the rivet 21 is inserted downward into the chuck 11, since the bottom of the rivet 21 is truncated, the first pin 4182 inserted into the chuck 11 will be pushed out first, and the first spring 4185 will be compressed. When the rivet 21 is fully inserted into the chuck 11, the first pin 4182 and the recessed portion of the rivet 21 are in the same horizontal plane, and are pushed by the first spring 4185 to cooperate with the recessed portion of the rivet 21, thereby playing a role in pre-positioning the rivet 21. It should be noted that the pre-positioning effect provided by the first spring 4185 is limited. Therefore, during the subsequent movement of the first linkage rod 4183 , it can still contact the first contact block 4184 to ensure the connection stability between the chuck 11 and the rivet 21 .

[0045] Furthermore, the second linkage clamping component 419 includes a second linkage rod 4191, a lower linkage rack 4192, a linkage gear 4193, a second fixed cylinder 4194, a second slider 4195, an upper linkage rack 4196 and a second latch 4197. The second linkage rod 4191 is horizontally fixed between the other ends of the linkage blocks 412 of the linkage clamping assembly 41 located on opposite sides of the same chuck 11. The lower linkage rack 4192 is horizontally fixed to the middle of the second linkage rod 4191. The length direction of the lower linkage rack 4192 is perpendicular to the length direction of the second linkage rod 4191. The linkage gear 4193 is rotatably connected to the inner cavity of the base 1 through the frame body. The linkage gear 4193 is located just above the lower linkage rack 4192. The second fixed cylinder 4194 is horizontally fixed to the top of the inner cavity of the base 1, and the second fixed cylinder 4194 is located above the linkage gear 4193. The length direction of the second fixed cylinder 4194 is parallel to the length direction of the lower linkage rack 4192. The second slider 4195 is slidably connected in the second fixed cylinder 4194. The upper linkage rack 4196 is horizontally fixedly connected to the bottom of the second slider 4195, and the bottom of the upper linkage rack 4196 is meshed with the linkage gear 4193. The movement direction of the lower linkage rack 4192 is opposite to that of the upper linkage rack 4196. The second latch 4197 is fixedly connected to one end of the second slider 4195 close to the chuck 11, and the second latch 4197 is matched with the concave part of the rivet 21. A second socket 113 is provided on the side wall of the chuck 11 close to the second latch 4197, and the second socket 113 is used for the second latch 4197 to be inserted.

[0046] When the linkage block 412 moves toward the two-way screw 42, the linkage block 412 will simultaneously drive the second linkage rod 4191 to move in the direction close to the two-way screw 42, and the lower linkage rack 4192 will drive the linkage gear 4193 to rotate during the movement, thereby driving the upper linkage rack 4196 to move through the linkage gear 4193, and the movement directions of the lower linkage rack 4192 and the upper linkage rack 4196 are opposite, so that the upper linkage rack 4196 drives the second slider 4195 and the second latch 4197 to move in the direction close to the chuck 11, so that the second latch 4197 is inserted into the second socket 113 and tightly fits with the recessed portion of the rivet 21. At the same time, the two main latches 417 are also tightly fit with the recessed portions of the rivet 21, respectively, to further improve the connection stability between the rivet 21 and the chuck 11.

[0047] Preferably, the inner cavity of the base 1 is horizontally slidably connected with two sets of abutting members 13, which are respectively located on both sides of the bidirectional lead screw 42, and one end of the abutting member 13 away from the bidirectional lead screw 42 is connected to one end of the lower linkage rack 4192, and the abutting member 13 cooperates with the smooth part of the bidirectional lead screw 42. In this embodiment, the abutting member 13 is made of rubber material, has a certain elasticity, and the end of the abutting member 13 close to the bidirectional lead screw 42 is arc-shaped.

[0048] When the lower linkage rack 4192 of the second linkage component moves toward the direction approaching the bidirectional lead screw 42, it will also drive the clamping member 13 to approach the bidirectional lead screw 42 at the same time, and when the second pin 4197 is inserted into the second socket 113 and tightly fits with the recessed portion of the rivet 21, the end of the clamping member 13 away from the lower linkage rack 4192 contacts the smooth portion of the bidirectional lead screw 42 and presses against the smooth portion of the bidirectional lead screw 42 with a certain force, thereby limiting the rotation of the bidirectional lead screw 42 to a certain extent.

[0049] Furthermore, the ends of the main latch 417, the first latch 4182, and the second latch 4197 close to the chuck 11 are all arranged in an arc shape, and match with the arc surface of the recessed portion of the rivet 21. The main latch 417, the first latch 4182, and the second latch 4197 arranged in an arc shape at the ends can increase the contact area with the recessed portion of the rivet 21, so as to improve the connection stability between the recessed portion of the rivet 21 and the main latch 417, the first latch 4182, and the second latch 4197, respectively.

[0050] The implementation principle of a male and female combined pneumatic clamp for machining in the embodiment of the present application is as follows: a workpiece may need to pass through machine tools for different machining operations in sequence, and the base seat 1 of the present application is installed on multiple different machine tools that need machining operations. When the workpiece is processed on a certain machine tool, the fixture plate 2 is removed from the base seat 1 and installed on the base seat 1 of the next machine tool, thereby realizing the rapid replacement of workpieces on different machine tools; when it is necessary to realize the connection between the base seat 1 and the fixture plate 2, the fixture plate 2 is placed downward, so that the two rivets 21 are respectively inserted into the two chucks 11, and then the two lead screw nuts 421 are driven to approach each other through the driving assembly 43, so that the lead screw nuts 42 The input ends of the two corresponding linkage clamping assemblies 41 are controlled to push the bottom slider 416 to move in the bottom slide rail 415, so that the bottom limit block 4161 can drive the linkage block 412 to move to a position close to the bidirectional lead screw 42 during the movement of the inclined groove 4121 and under the limiting action of the middle slide rail 411, so that the top limit block 4141 can drive the top slider 414 to move in a direction close to the chuck 11 during the movement of the V-shaped groove 4122 and under the limiting action of the top slide rail 413, and finally be inserted into the main socket 111 of the chuck 11, so that the main latch 417 is tightly matched with the recessed portion of the rivet 21.

[0051] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A male and female combined pneumatic clamp for machining, characterized in that: include: A base (1), a plurality of chucks (11) arranged on the base (1), a fixture plate (2) located on the base (1), a plurality of rivets (21) arranged on the fixture plate (2) and plugged into and matched with the chucks (11), a fixture mechanism (3) arranged on the fixture plate (2), and a connecting mechanism (4) arranged in the base (1) and connecting the rivets (21) and the chucks (11), wherein the connecting mechanism (4) comprises: A linkage clamping assembly (41) is arranged in the base (1), and the number of linkage clamping assemblies (41) corresponding to each chuck (11) is two groups, and the two groups of linkage clamping assemblies (41) are respectively located on two opposite sides of the chuck (11); A bidirectional lead screw (42) is rotatably disposed in the base seat (1), and lead screw nuts (421) are connected to opposite threaded sections of the bidirectional lead screw (42), and the two lead screw nuts (421) are respectively connected to the input ends of two groups of linkage clamping assemblies (41), and the output end of the linkage clamping assembly (41) penetrates the side wall of the chuck (11) and cooperates with the recessed portion of the rivet (21); The driving assembly (43) is arranged in the base seat (1) and is used to drive the bidirectional lead screw (42) to rotate.

2. A male and female combined pneumatic clamp for machining according to claim 1, characterized in that: The linkage clamping assembly (41) comprises a middle slide rail (411) arranged in the base seat (1), a linkage block (412) slidably connected to the middle slide rail (411), a top slide rail (413) arranged in the base seat (1), a top slider (414) slidably connected to the top slide rail (413), a bottom slide rail (415) arranged in the base seat (1), a bottom slider (416) slidably connected to the bottom slide rail (415), a main latch (417) arranged at one end of the top slider (414) and penetrating the side wall of the chuck (11), a first linkage clamping component (418) arranged at one end of the linkage block (412) and cooperating with the recessed portion of the pull nail (21), and a second linkage clamping component (419) arranged at the other end of the linkage block (412) and cooperating with the recessed portion of the pull nail (21), and the lead screw nut (421) The two sides are respectively connected to the bottom slider (416) through connecting rods, an inclined groove (4121) is provided at one end of the linkage block (412) close to the bottom slider (416), and a bottom stop block (4161) slidably connected to the inclined groove (4121) is provided at one end of the bottom slider (416) close to the linkage block (412), a V-shaped groove (4122) is provided at one end of the linkage block (412) close to the top slider (414), and a top stop block (4141) slidably connected to the V-shaped groove (4122) is provided at one end of the top slider (414) close to the linkage block (412), and the supply portion of the V-shaped groove (4122) faces a position away from the chuck (11), and when the top stop block (4141) moves to the two ends in the V-shaped groove (4122), the main latch (417) is inserted into the chuck (11).

3. A male and female combined pneumatic clamp for machining according to claim 2, characterized in that: The first linkage clamping component (418) comprises a first fixed cylinder (4181) arranged in the base (1), a first latch (4182) slidably arranged in the first fixed cylinder (4181), a first linkage rod (4183) arranged between one end of the linkage blocks (412) of the two groups of linkage clamping assemblies (41), and a first contact block (4184) arranged at one end of the first latch (4182) close to the first linkage rod (4183), the first latch (4182) passing through the inner wall of the chuck (11) and cooperating with the recessed portion of the rivet (21), the first contact block (4184) extending out of the first fixed cylinder (4181), and the first linkage rod (4183) cooperating with the first contact block (4184) to press the first latch (4182).

4. The male and female combined pneumatic clamp for machining according to claim 3, characterized in that: A first spring (4185) is provided between the first fixing tube (4181) and the first contact block (4184), and the first spring (4185) is used to push the first latch (4182) to be inserted into the chuck (11). The bottom of the pull nail (21) is in the shape of a truncated cone that is wide at the top and narrow at the bottom.

5. The male and female combined pneumatic clamp for machining according to claim 3, characterized in that: The second linkage clamping component (419) comprises a second linkage rod (4191) arranged between the other ends of the linkage blocks (412) of the two groups of linkage clamping assemblies (41), a lower linkage rack (4192) arranged on the second linkage rod (4191), a linkage gear (4193) rotatably arranged in the base (1) and meshed with the top of the lower linkage rack (4192), a second fixed cylinder (4194) arranged in the base (1), a second slider (4195) slidably connected in the second fixed cylinder (4194), an upper linkage rack (4196) arranged at the bottom of the second slider (4195) and meshed with the top of the linkage gear (4193), and a second latch (4197) arranged at one end of the second slider (4195) and penetrating the side wall of the chuck (11), wherein the second latch (4197) cooperates with the recessed portion of the rivet (21).

6. The male and female combined pneumatic clamp for machining according to claim 5, characterized in that: Elastic abutting members (13) are slidably arranged inside the base seat (1) and on both sides of the bidirectional lead screw (42); one end of the abutting member (13) is connected to one end of the lower linkage rack (4192); and the abutting member (13) cooperates with the smooth portion of the bidirectional lead screw (42).

7. The male and female combined pneumatic clamp for machining according to claim 5, characterized in that: The ends of the main latch (417), the first latch (4182) and the second latch (4197) close to the chuck (11) are all arranged in an arc shape and cooperate with the arc surface of the recessed portion of the rivet (21).

8. The male and female combined pneumatic clamp for machining according to claim 5, characterized in that: The side wall of the chuck (11) is provided with two symmetrically arranged main sockets (111), and the two main pins (417) are respectively plugged into the two main sockets (111). The side wall of the chuck (11) is provided with a first socket (112) for inserting a first pin (4182), and the side wall of the chuck (11) is provided with a second socket (113) for inserting a second pin (4197).

9. The male and female combined pneumatic clamp for machining according to claim 1, characterized in that: The driving assembly (43) comprises a driving member (431) arranged in the base (1), a driving bevel gear (432) arranged at the output end of the driving member (431), and a driven bevel gear (433) arranged on the bidirectional lead screw (42) and meshing with the driving bevel gear (432).

10. The male and female combined pneumatic clamp for machining according to claim 1, characterized in that: The inner wall of the base seat (1) is provided with a guide groove, in which a guide block (12) is slidably arranged, and the guide block (12) is connected to the lead screw nut (421).

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