CN216226974U

CN216226974U - Coupling clamping mechanism

Info

Publication number: CN216226974U
Application number: CN202220054405.3U
Authority: CN
Inventors: 张建平; 卢小芹; 王志方
Original assignee: Shandong De Hua No1 Machine Tool Nc Equipment Co ltd
Current assignee: Shandong Deyi Robot Co ltd
Priority date: 2022-01-11
Filing date: 2022-01-11
Publication date: 2022-04-08
Anticipated expiration: 2032-01-11

Abstract

The utility model relates to the technical field of clamping devices, in particular to a coupling clamping mechanism which comprises a main clamping device and an auxiliary clamping device, wherein the main clamping device and the auxiliary clamping device are respectively used for clamping two ends of a workpiece, the main clamping device comprises a clamping assembly, a plurality of clamping assemblies and a driving assembly, the driving assembly is used for driving the clamping assemblies to rotate, the clamping assemblies can drive clamping bodies of the clamping assemblies to synchronously move along the radial direction through rotation of the clamping assemblies so as to clamp and position the workpiece, and through the matching of the main clamping device and the auxiliary clamping device, the stress of a coupling can be more stable and balanced, the stable clamping is convenient to realize, and the coupling is prevented from falling off.

Description

Coupling clamping mechanism

Technical Field

The utility model relates to the technical field of clamping devices, in particular to a coupling clamping mechanism.

Background

Couplings are a very important class of parts in the petroleum industry. In the production process of the coupling, a whole long steel pipe needs to be conveyed to a cutting device, the long steel pipe is cut into a section of short steel pipe, and then subsequent processes such as polishing or labeling are carried out until the steel pipe is machined and formed. In the technical process, the mechanical clamping mechanism plays an important role in the positioning and conveying process of the coupling, and because the coupling has a certain length, the existing clamping mechanism can only be clamped on one side of the coupling, so that the whole stress of the coupling is not very balanced, the clamping is unstable, the phenomenon of unstable clamping is easily generated during clamping, the coupling is easy to fall off, and the subsequent processing effect is influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model provides a coupling clamping mechanism capable of realizing stable clamping.

The technical scheme adopted by the utility model for solving the technical problems is as follows: a coupling clamping mechanism comprises a main clamping device and an auxiliary clamping device which are used for clamping two ends of a workpiece respectively, wherein the workpiece can penetrate through the centers of the main clamping device and the auxiliary clamping device; the main clamping device comprises a clamping assembly, a plurality of clamping assemblies and a driving assembly; the driving assembly is used for driving the clamping assembly to rotate; the clamping assemblies are arranged in the clamping assembly and comprise clamping bodies used for clamping workpieces; the clamping assembly rotates to drive the plurality of clamping bodies to synchronously move along the radial direction so as to clamp and position the workpiece.

Furthermore, the clamping assembly comprises a clamping faceplate, and a circular through hole for accommodating a workpiece to pass through is formed in the center of the clamping faceplate; a disc cavity is formed in the clamping disc chuck, and the clamping assemblies are circumferentially distributed on one side, close to the circular through opening, of the disc cavity in an array manner; one side of the clamping face plate, which is far away from the circular through hole, is provided with a plurality of loosening blocks used for driving the clamping body to move along the radial direction.

Furthermore, the clamping assembly also comprises a fixed seat, the clamping body is arranged on the fixed seat in a sliding manner, and the upper end and the lower end of the clamping body penetrate through the fixed seat; the clamping body is fixed through the fixing seat, so that the clamping assembly does not rotate along with the clamping assembly.

Furthermore, the plurality of loosening blocks are respectively arranged in one-to-one correspondence with the plurality of clamping assemblies, an arc-shaped movable convex block is arranged on one side, close to the circular through opening, of each loosening block, and the circle center of the arc-shaped structure to which the movable convex block belongs and the circle center of the circular through opening of the clamping disc are eccentrically arranged, so that the movable convex block is provided with a free end and a clamping end; the side surface of the card body is provided with a movable groove matched with the movable lug; the movable convex block is arranged in the movable groove in a sliding mode, and when the clamping body moves to the clamping end of the movable convex block relatively, the clamping assembly can clamp a workpiece.

As optimization, the clamping assembly further comprises a plurality of clamping blocks; the clamping blocks are also respectively arranged in one-to-one correspondence with the clamping assemblies, and the top surface of the clamping body and one side of the clamping block opposite to the clamping body are both in inclined arc structures which are matched with each other, so that the clamping blocks are also provided with free ends and clamping ends, and the clamping blocks are in contact connection with the top of the clamping body; one side of the clamping block close to the clamping end is provided with a locking part used for limiting the clamping body.

Further, the driving assembly comprises a gear and a clamping oil cylinder for driving the gear to rotate; a rack type piston rod is arranged on the clamping oil cylinder, and a rack of the rack type piston rod is meshed with the gear; and a disc chuck shaft is arranged on the end face of the clamping disc chuck and fixedly connected with the gear.

As optimization, a movable opening for accommodating the fixed seat to pass through is formed in the end face of the clamping faceplate; one ends of the fixing seats penetrate through the movable opening to the outer side of the clamping disc, and the ends of the fixing seats, which are positioned on the outer side of the clamping disc, are fixedly connected to the same fixing ring; the fixing ring is connected with a fixed sleeve shaft which is fixedly arranged, and the fixed sleeve shaft is sleeved on the outer side of the disc chuck shaft.

Further, the auxiliary chucking device includes a chuck housing; a plurality of hydraulic cylinders are arranged in the chuck shell, and each hydraulic cylinder is distributed along the radial direction of the chuck shell; the tail end of a piston rod of the hydraulic cylinder movably penetrates through the chuck shell and is connected with an auxiliary clamping jaw for clamping a workpiece.

Preferably, an oil guide body for supplying oil to the plurality of hydraulic cylinders is further arranged in the chuck shell.

As optimization, a piston pin is vertically arranged on a piston rod of the hydraulic cylinder; movable grooves are formed in the positions, corresponding to the two ends of the piston pin, of the two sides of the cylinder body of the hydraulic cylinder; the two ends of the piston pin penetrate through the piston rod and are arranged in the movable groove in a sliding mode, and the movable groove can accommodate the piston pin to move up and down along with the piston rod.

The utility model has the beneficial effects that: compared with the prior art, the coupling clamping mechanism provided by the utility model has the advantages that the main clamping device and the auxiliary clamping device which are respectively used for clamping two ends of a coupling are arranged, so that the stress of the coupling is more stable and balanced, and the coupling is prevented from falling off; the main clamping device is used as a main clamping and positioning device, the clamping components are driven to move through the rotation of the clamping components, and the main clamping claws of the clamping components synchronously move in the radial direction, so that the clamping and positioning processes of the coupling can be conveniently controlled; the auxiliary clamping device is used as an auxiliary clamping device and can be matched with the main clamping device, and the auxiliary clamping jaw is controlled by the hydraulic cylinder to realize stable clamping of the coupling.

Drawings

FIG. 1 is a schematic view of an overall axial structure of the present invention;

FIG. 2 is a schematic axial view of the main clamping device;

FIG. 3 is a schematic front view of the main clamping device;

FIG. 4 is a schematic cross-sectional view of the primary clamping device along the axial direction;

FIG. 5 is an enlarged view of the structure at A in FIG. 4;

FIG. 6 is a schematic axial view of the auxiliary clamping device;

FIG. 7 is a front view of the auxiliary clamping device;

fig. 8 is a schematic sectional structure view along the direction B-B in fig. 7.

The clamping device comprises a steel pipe blank 1, a steel pipe blank 2, a clamping assembly 3, a clamping assembly, a driving assembly 4, a main clamping device 5, a main clamping device 6, an auxiliary clamping device 201, a circular through hole 202, a clamping disc 203, a disc cavity 204, a loosening block 205, a movable convex block 206, a free end 207, a clamping end 208, a movable opening 209, a clamping block 210, a locking part 211, a disc shaft 301, a clamping body 302, a movable groove 303, a fixed seat 304, a main clamping claw 305, a fixed ring 306, a fixed sleeve shaft 401, a gear 402, a clamping oil cylinder 403, a rack type piston rod 601, a clamping disc shell 602, a hydraulic cylinder 6021, a cylinder body 6022, a piston rod 6023, a piston pin 6024, a movable groove 603, an auxiliary clamping claw 604, an oil guide body 6041, a P cavity oil circuit 6042, an R cavity oil circuit 605, an oil groove pressing plate 6051, a P cavity oil circuit 6052, The R-chamber supplies the oil circuit.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.

The coupling clamping mechanism mainly comprises a main clamping device 5 and an auxiliary clamping device 6 which are arranged at intervals in the front and back, wherein the main clamping device 5 and the auxiliary clamping device 6 are respectively used for clamping two ends of a steel pipe blank 1 so as to more stably and firmly clamp the steel pipe blank 1.

The main chucking device 5 includes a chucking assembly 2, a clamping assembly 3, and a driving assembly 4. The center of the clamping assembly 2 has a circular through hole 201, so that the steel pipe blank 1 can pass through the circular through hole 201 of the clamping assembly 2. The clamping components 3 are a plurality of and are evenly distributed on the clamping component 2. The driving assembly 4 can drive the clamping assembly 2 to rotate, and the clamping assembly 2 can drive the clamping assemblies 3 to move synchronously along the radial direction, so that the clamping assemblies 3 can clamp and clamp the steel pipe blank 1 penetrating through the clamping assembly 2.

The clamping assembly 2 comprises a clamping disc 202 in an annular structure, and a circular through hole 201 is formed in the middle of the clamping disc 202, so that the steel pipe blank 1 can penetrate through the center of the clamping disc 202. The inside of chucking faceplate 202 is equipped with faceplate cavity 203, a plurality of centre gripping subassemblies 3 that are used for carrying out the centre gripping to steel pipe blank 1 all are located faceplate cavity 203.

A plurality of loosening blocks 204 arranged in a circumferential array are arranged in the faceplate cavity 203, and the plurality of loosening blocks 204 are respectively in one-to-one correspondence with the plurality of clamping assemblies 3. An arc-shaped movable lug 205 is vertically and integrally formed on one side, close to the circular through hole 201 of the clamping faceplate 202, of the loosening block 204, the movable lug 205 is arranged in an inclined mode, the circle center of the arc-shaped structure, to which the movable lug 205 belongs, and the circle center of the circular through hole 201 of the clamping faceplate 202 are arranged in an eccentric mode, and therefore the loosening block 204 is provided with a free end 206 and a clamping end 207. Each clamping assembly 3 comprises a cylindrical clamping body 301, an arc-shaped movable groove 302 is formed in the peripheral side face of the clamping body 301, and the movable protrusion 205 is connected with the movable groove 302 in a sliding mode, so that when the clamping chuck 202 drives the loosening block 204 to rotate, the loosening block 204 drives the clamping body 301 to slide back and forth between the free end 206 and the clamping end 207 of the loosening block 204, radial movement of the clamping body 301 is achieved, and clamping of the steel pipe blank 1 is achieved. The clamping body 301 is movably connected to the fixing seat 303, and the fixing seat 303 is fixedly arranged and does not rotate along with the clamping assembly 2. The upper end and the lower end of the clamp body 301 penetrate through the fixing base 303, one end, far away from the loosening block 204, of the clamp body 301 is connected with a main clamping jaw 304, and the main clamping jaw 304 is used for directly contacting and clamping the steel pipe blank 1.

The end surface of the clamping faceplate 202 is provided with a movable opening 208 for accommodating the fixed seat 303 to pass through, and the movable opening 208 is also of an arc structure so as to provide enough rotating space for the clamping faceplate 202 and avoid the fixed seat 303 from hindering the rotation of the clamping faceplate 202. One end of the fixing base 303 penetrates through the movable opening 208 to the outer side of the clamping faceplate 202, and one ends of the fixing bases 303 located on the outer side of the clamping faceplate 202 are fixedly connected to the same fixing ring 305, the fixing ring 305 is connected with a fixing sleeve shaft 306, and the fixing sleeve shaft 306 is fixedly arranged and can be fixed on a fixing frame or other platform main bodies (not shown in the figure), so that the position of the clamping component 3 is fixed, and the clamping component 3 does not rotate along with the clamping component 2.

A clamping block 209 is also arranged between the loosening block 204 and the clamping faceplate 202, the top surface of the clamping body 301 and the side surface of the clamping block 209 opposite to the clamping body 301 are in arc structures which are matched and obliquely arranged, and the arc structures are matched with the arc structures of the movable convex blocks 205, so that the clamping block 209 also has a free end 206 and a clamping end 207. The clamping block 209 is in contact connection with the top of the card body 301. One side integrated into one piece that chucking piece 209 was located chucking end 207 has one to be used for carrying out spacing locking portion 210 to the card body 301, works as when the card body 301 relative slip is to the chucking end 207 of chucking piece 209, locking portion 210 is used for spacing the card body 301, avoids chucking subassembly 2 to continue to rotate, prevents that the card body 301 from breaking away from loosening piece 204 and chucking piece 209.

A chuck shaft 211 is integrally formed on the end surface of one side of the chuck 202, and the chuck shaft 211 is arranged inside the fixed sleeve shaft 306. The end of the chuck shaft 211 remote from the chuck 202 is connected to the drive assembly 4. The drive assembly 4 comprises a gear 401, the gear 401 being driven by a clamping cylinder 402.

Specifically, the piston rod of the clamping cylinder 402 is a rack-type piston rod 403, the gear 401 is engaged with a rack on the rack-type piston rod 403, and the gear 401 can be driven to rotate by the extension and contraction of the rack-type piston rod 403, so as to drive the clamping assembly 2 to rotate. As another alternative, a rack (not shown in the figure) is connected to the end of the clamping cylinder 402, and the rack is engaged with the gear 401, and the clamping cylinder 402 drives the rack to extend and retract, so as to drive the gear 401 to rotate. Of course, the driving assembly 4 is not limited to the above two ways as long as the clamping assembly 2 can be driven to rotate.

The steel pipe blank 1 can pass through the center of the gear 401, the inner part of the chuck shaft 211 and the circular through hole 201 of the clamping assembly 2, so that the clamping assembly 3 can clamp the steel pipe blank 1.

In the present invention, the auxiliary clamping device 6 has a different structure from the main clamping device 5, and as another alternative embodiment, the auxiliary clamping device 6 may have the same structure as the main clamping device 5.

The auxiliary clamping device 6 comprises a chuck shell 601 with an annular structure, and a circular through hole 201 for the steel pipe blank 1 to pass through is also arranged at the center of the chuck shell 601. A plurality of hydraulic cylinders 602 are circumferentially arrayed on the chuck housing 601, and the directions of the hydraulic cylinders 602 are consistent with the radial direction of the chuck housing 601. The cylinder body 6021 of the hydraulic cylinder 602 is fixedly arranged in the chuck shell 601, the piston rod 6022 of the hydraulic cylinder 602 is arranged towards the inner side of the chuck shell 601, the tail end of the piston rod 6022 movably penetrates through the chuck shell 601 and is connected with a plurality of auxiliary claws 603, and the auxiliary claws 603 are used for clamping the steel pipe blank 1 positioned at the circular through hole 201 of the chuck shell 601. The hydraulic cylinders 602 can drive the piston rods 6022 to move radially, so that the auxiliary clamping claws 603 can cooperate with the steel pipe blank 1 to clamp the steel pipe blank in an auxiliary manner. In the present invention, the number of the auxiliary claws 603 is 4, but in practical application, the number can be adjusted according to production requirements, and the present invention is not limited to this.

The chuck shell 601 is further provided with an oil guide body 604 for supplying oil to the plurality of hydraulic cylinders 602, and the oil guide body 604 is internally provided with a P-cavity oil passage 6041 and an R-cavity oil passage 6042. An oil groove pressing plate 605 is further pressed at one end side of the chuck housing 601, a P-cavity oil supply loop 6051 and an R-cavity oil supply loop 6052 are arranged on the oil groove pressing plate 605, and both the P-cavity oil supply loop 6051 and the R-cavity oil supply loop 6052 are concentrically arranged with the oil groove pressing plate (the P-cavity oil supply loop 6051 and the R-cavity oil supply loop 6052 shown in the figure are only cross-sectional portions). The inlet end of the P-cavity oil supply loop 6051 is communicated with a P-cavity oil path 6041 of the oil guide body 604, and the outlet end of the P-cavity oil supply loop 6051 is communicated with the oil inlet cavities of the plurality of hydraulic cylinders 602, so that hydraulic oil in the P-cavity oil path 6041 on the oil guide body 604 can pass through the chuck shell 601 to enter the P-cavity oil supply loop 6051 on the oil groove pressing plate 605 and is conveyed into the oil inlet cavity of the hydraulic cylinder 602 along the P-cavity oil supply loop 6051, or oil in the oil inlet cavity of the hydraulic cylinder 602 can flow back into the oil guide body 604; the inlet end of the R-cavity oil supply loop 6052 is communicated with the R-cavity oil passage 6042 of the oil guide body 604, and the outlet end of the R-cavity oil supply loop 6052 is communicated with the oil return cavities of the plurality of hydraulic cylinders 602, so that hydraulic oil in the R-cavity oil passage 6042 on the oil guide body 604 can pass through the chuck shell 601 to enter the R-cavity oil supply loop 6052 of the oil groove pressing plate 605 and is conveyed to the oil return cavity of the hydraulic cylinder 602 along the R-cavity oil supply loop 6052, or oil in the oil return cavity of the hydraulic cylinder 602 can flow back to the oil guide body 604. After the pressure of the hydraulic oil is adjusted by a pressure reducing valve (not shown in the figure), the hydraulic oil enters a P-cavity oil path 6041 of the oil guide body 604 and is conveyed to oil inlet cavities of a plurality of hydraulic cylinders 602 through an oil groove pressure plate 605, a plurality of piston rods 6022 are pushed to synchronously move radially, and the auxiliary clamping jaws 603 are used for clamping the steel pipe blank 1.

The jaw of the auxiliary jaw 603 is detachable, and is detachably fixed at the tail end of the piston rod 6022 through fixing pieces such as pins or bolts, so that the auxiliary jaw 603 is convenient to detach and replace, and the requirements for clamping steel pipe blanks 1 with different specifications are met.

A piston pin 6023 for preventing the piston rod 6022 from rotating is also movably connected between the piston rod 6022 and the cylinder body 6021. Specifically, the piston pin 6023 is disposed perpendicularly to the central axis direction of the piston rod 6022, a movable groove 6024 for accommodating the piston pin 6023 is provided at both sides of the cylinder block 6021 at positions corresponding to both ends of the piston pin 6023, both ends of the piston pin 6023 are inserted through the piston rod 6022 and slidably provided in the movable groove 6024, and the movable groove 6024 can accommodate the piston pin 6023 to move up and down with the piston rod 6022. Thus, the engagement between the piston pin 6023 and the movable groove 6024 prevents the auxiliary jaw 603 from rotating the piston rod 6022 of the hydraulic cylinder 602 when clamping the steel pipe material 1, and prevents the auxiliary jaw 603 from twisting.

The above embodiments are only specific cases of the present invention, and the protection scope of the present invention includes but is not limited to the product forms and styles of the above embodiments, and any collar clamping mechanism according to the claims of the present invention and any suitable changes or modifications thereof by those of ordinary skill in the art shall fall within the protection scope of the present invention.

Claims

1. A coupling clamping mechanism which characterized in that: the clamping device comprises a main clamping device and an auxiliary clamping device which are used for clamping two ends of a workpiece respectively, wherein the workpiece can penetrate through the centers of the main clamping device and the auxiliary clamping device; the main clamping device comprises a clamping assembly, a plurality of clamping assemblies and a driving assembly; the driving assembly is used for driving the clamping assembly to rotate; the clamping assemblies are arranged in the clamping assembly and comprise clamping bodies used for clamping workpieces; the clamping assembly rotates to drive the plurality of clamping bodies to synchronously move along the radial direction so as to clamp and position the workpiece.

2. The coupling clamping mechanism of claim 1, wherein: the clamping assembly comprises a clamping faceplate, and a circular through hole for accommodating a workpiece to pass through is formed in the center of the clamping faceplate; a disc cavity is formed in the clamping disc chuck, and the clamping assemblies are circumferentially distributed on one side, close to the circular through opening, of the disc cavity in an array manner; one side of the clamping face plate, which is far away from the circular through hole, is provided with a plurality of loosening blocks used for driving the clamping body to move along the radial direction.

3. The coupling clamping mechanism of claim 2, wherein: the clamping assembly further comprises a fixed seat, the clamping body is arranged on the fixed seat in a sliding mode, and the upper end and the lower end of the clamping body penetrate through the fixed seat; the clamping body is fixed through the fixing seat, so that the clamping assembly does not rotate along with the clamping assembly.

4. The coupling clamping mechanism of claim 2, wherein: the clamping assemblies are arranged on the clamping blocks in a one-to-one correspondence mode, the clamping assemblies are arranged on the clamping blocks in a clamping mode, the clamping assemblies are arranged on the clamping assemblies, and the clamping assemblies are arranged on the clamping assemblies; the side surface of the card body is provided with a movable groove matched with the movable lug; the movable convex block is arranged in the movable groove in a sliding mode, and when the clamping body moves to the clamping end of the movable convex block relatively, the clamping assembly can clamp a workpiece.

5. The coupling clamping mechanism of claim 4, wherein: the clamping assembly also comprises a plurality of clamping blocks; the clamping blocks are also respectively arranged in one-to-one correspondence with the clamping assemblies, and the top surface of the clamping body and one side of the clamping block opposite to the clamping body are both in inclined arc structures which are matched with each other, so that the clamping blocks are also provided with free ends and clamping ends, and the clamping blocks are in contact connection with the top of the clamping body; one side of the clamping block close to the clamping end is provided with a locking part used for limiting the clamping body.

6. The coupling clamping mechanism of claim 3, wherein: the driving assembly comprises a gear and a clamping oil cylinder for driving the gear to rotate; a rack type piston rod is arranged on the clamping oil cylinder, and a rack of the rack type piston rod is meshed with a gear; and a disc chuck shaft is arranged on the end face of the clamping disc chuck and fixedly connected with the gear.

7. The coupling clamping mechanism of claim 6, wherein: the end surface of the clamping faceplate is provided with a movable opening for accommodating the fixed seat to pass through; one ends of the fixing seats penetrate through the movable opening to the outer side of the clamping disc, and the ends of the fixing seats, which are positioned on the outer side of the clamping disc, are fixedly connected to the same fixing ring; the fixing ring is connected with a fixed sleeve shaft which is fixedly arranged, and the fixed sleeve shaft is sleeved outside the disc shaft.

8. The coupling clamping mechanism of claim 1, wherein: the auxiliary clamping device comprises a chuck shell; a plurality of hydraulic cylinders are arranged in the chuck shell, and each hydraulic cylinder is distributed along the radial direction of the chuck shell; the tail end of a piston rod of the hydraulic cylinder movably penetrates through the chuck shell and is connected with an auxiliary clamping jaw for clamping a workpiece.

9. The coupling clamping mechanism of claim 8, wherein: and an oil guide body for supplying oil to the hydraulic cylinders is further arranged in the chuck shell.

10. The coupling clamping mechanism of claim 8, wherein: a piston pin is vertically arranged on a piston rod of the hydraulic cylinder; movable grooves are formed in the positions, corresponding to the two ends of the piston pin, of the two sides of the cylinder body of the hydraulic cylinder; the two ends of the piston pin penetrate through the piston rod and are arranged in the movable groove in a sliding mode, and the movable groove can accommodate the piston pin to move up and down along with the piston rod.