Six-claw turntable clamping device driven by single cylinder

Abstract

The utility model discloses a six-claw turntable clamping device driven by a single cylinder. The six-claw turntable clamping device can be used as an independent component to be mounted on automatic equipment in the field of mechanical equipment. The device is composed of a double-acting air cylinder, a rotating arm and a chuck, the double-acting air cylinder provides driving force for clamping and loosening of the chuck, and an air cylinder driving piston and a rotating disc in the chuck are connected through the rotating arm. The air cylinder drives the rotating arm, the rotating arm drives the rotating disc assembly to rotate by a certain angle in the shell, the small sliding shaft in the rotating groove drives the clamping block shaft and the clamping block to stretch out and draw back together, and therefore the pipe clamping effect is achieved. According to the single-air-cylinder driving and rotating disc mechanism, the defect of asynchronism caused by the fact that a common chuck adopts multiple air cylinders to drive clamping blocks is overcome, clamping synchronism and uniformity of clamping force are greatly improved, and therefore the problem of relative sliding between the chuck and a pipe is avoided, precision of fixed-length cutting of products is improved, and production efficiency is improved. And meanwhile, a single cylinder is adopted to replace multiple cylinders, so that the manufacturing cost of the clamping device is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical equipment, in particular to a six-claw turntable clamping device driven by a single cylinder, which is applied to clamping pipes on various continuous production lines of pipes to achieve fixed-length cutting of the pipes. Background Art

[0002] In various types of continuous production pipe production lines, pipe products are cut according to the specified standard length series through special automatic cutting equipment. When cutting the pipe, the front and rear clamping devices first clamp the outer surface of the pipe. At this time, the cutting machine and the pipe move synchronously, and the saw blade set between the two clamping devices cuts according to the length set by the program. The ordinary clamping device adopts a multi-cylinder drive method. The device consists of a shell, a cylinder, and a clamping block. The cylinder seat is connected to the flange of the outer circle of the shell. Each clamping block is connected to the top of the cylinder piston. Clamping is achieved by the extension and contraction of the cylinder piston rod under air pressure control. However, the biggest disadvantage of this clamping method is that the movement of each clamping block is asynchronous and the stability is poor, which often leads to relative sliding between the clamping block and the pipe, thereby affecting the cutting accuracy (length and verticality). Utility Model Content

[0003] The purpose of the utility model is to remedy the defects of the prior art and provide a six-claw turntable clamping device driven by a single cylinder, which is used for clamping pipes on various continuous pipe production lines to achieve fixed-length cutting of pipes. The utility model uses a single cylinder to rotate the turntable inside the shell by a certain angle through a rotating arm, and converts the rotational motion of the turntable into linear motion of the clamping block through a sliding shaft. The expansion and contraction amount of each clamping block at any position of the sliding shaft remains the same, thereby achieving synchronization and stability of the clamping motion, thereby avoiding the relative sliding problem between the clamping block and the pipe, and improving the precision of fixed-length cutting of the product; at the same time, a single cylinder is used instead of multiple cylinders, thereby greatly reducing the manufacturing cost of the clamping device.

[0004] The utility model is realized by the following technical solutions:

[0005] A six-claw turntable clamping device driven by a single cylinder comprises a single-drive double-acting cylinder, a rotating arm and an annular chuck, wherein the annular chuck comprises an annular shell, an annular turntable assembly, a guide shaft seat, a clamping block shaft, a clamping block and a small sliding shaft, wherein the annular turntable assembly is rotatably mounted inside the annular shell, a plurality of guide shaft seats are evenly mounted on the outer circumferential surface of the annular shell, a clamping block shaft through hole is opened on the guide shaft seat, the clamping block shaft is inserted into the clamping block shaft through hole of the guide shaft seat and extends to the inner ring of the annular shell, and the clamping block shaft extends into the annular shell One end of the ring is fixedly connected to the clamping block, and a strip slide groove is opened on each clamping block shaft. An inclined slide groove corresponding to the multiple strip slide grooves is opened on the end surface of the annular turntable assembly, and the sliding small shaft is connected to the corresponding strip slide grooves and the inclined slide groove; a small rotating arm is fixed on the outer circumferential surface of the annular turntable assembly, and an avoidance groove for the small rotating arm to pass through and rotate is opened on the outer circumferential surface of the annular shell. The small rotating arm passes through the avoidance groove and is rotatably connected to one end of the rotating arm, and the other end of the rotating arm is rotatably connected to the moving end of the single-drive double-acting cylinder.

[0006] The annular turntable assembly includes two annular turntables, which are connected by a connecting shaft. A plurality of supporting shafts are connected to the outer ends of the annular turntables corresponding to the positions of each connecting shaft. Rolling bearings are installed at both ends of the supporting shafts. The small rotating arm is fixed on one of the annular turntables. Corresponding inclined grooves are opened on the two annular turntables. The clamping block shaft and the guide shaft seat are located between the two annular turntables.

[0007] An adjusting screw is connected between the corresponding supporting shaft and the connecting shaft.

[0008] The annular shell comprises an annular shell body, end covers are connected to both sides of the annular shell body, a guide shaft seat mounting hole is opened on the annular shell body, and the avoidance groove is opened on the annular shell body.

[0009] The end of the clamping block is provided with an arc-shaped groove, and a rubber block is pasted in the arc-shaped groove.

[0010] The two ends of the small sliding shaft pass through the inclined sliding grooves on the two annular rotating disks respectively, and baffles and screw limiters are arranged on the outer sides of the annular rotating disks.

[0011] Under the action of air pressure, the piston rod of the single-drive double-acting cylinder is extended and retracted, and the annular turntable assembly inside the annular chuck is driven to rotate through the rotating arm. The strip slide groove of the annular turntable assembly drives the sliding small shaft to reciprocate in the clamping block shaft through-hole of the guide shaft seat, thereby driving the clamping block shaft and the clamping block to extend and retract to realize the clamping and releasing actions.

[0012] The single-drive double-acting cylinder is a piston-type double-acting cylinder, and the pressure during operation is 0.5 MPa.

[0013] The advantages of the utility model are: the synchronization and stability of the product clamping are greatly improved, and the cutting accuracy of the pipe (length and end face verticality) is improved; the overall rigidity of the chuck is large, the strength is high, it can withstand a large clamping force, the force is evenly transmitted, and the relative sliding between the clamping block and the product is avoided; at the same time, because the cylinder is reduced compared with the ordinary chuck, the pneumatic noise is reduced and the manufacturing cost is reduced BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the annular chuck of the utility model;

[0016] Figure 3 This is a cross-sectional view of the annular chuck of the utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the turntable assembly of the utility model;

[0018] Figure 5 This is a cross-sectional view of the turntable assembly of the utility model. DETAILED DESCRIPTION

[0019] like Figure 1-5As shown, a six-claw turntable clamping device driven by a single cylinder includes a single-drive double-acting cylinder 1, a rotating arm 3 and an annular chuck 2, wherein the annular chuck 2 includes an annular shell 6, an annular turntable assembly 5, a guide shaft seat 7, a clamping block shaft 8, a clamping block 9 and a small sliding shaft 10, wherein the annular turntable assembly 5 is rotatably mounted inside the annular shell 6, and a plurality of the guide shaft seats 7 are evenly mounted on the outer circumferential surface of the annular shell 6. In the embodiment of the utility model, six guide shaft seats 7 are installed, and a clamping block shaft through hole is opened on the guide shaft seat 7. The clamping block shaft 8 is inserted into the clamping block shaft through hole of the guide shaft seat 7 and extends to the inner ring of the annular shell 6, and the clamping block shaft 8 extends into the inner ring of the annular shell 6 and is fixedly connected to the clamping block 9. A strip slide groove 16 is opened on each clamping block shaft 8. An inclined slide groove 17 corresponding to the multiple strip slide grooves 16 is opened on the end surface of the annular turntable assembly 5. The sliding small shaft 10 is connected to the corresponding strip slide grooves 16 and the inclined slide grooves 17; a small rotating arm 4 is fixed on the outer circumferential surface of the annular turntable assembly 5, and an avoidance groove for the small rotating arm 4 to pass through and rotate is opened on the outer circumferential surface of the annular shell 6. The small rotating arm 4 passes through the avoidance groove and is rotatably connected to one end of the rotating arm 3, and the other end of the rotating arm 3 is rotatably connected to the moving end of the single-drive double-acting cylinder 1. The single-drive double-acting cylinder 1 moves, driving the annular turntable assembly 5 to rotate through the rotating arm 3 and the small rotating arm 4, and the power is transmitted to the clamping block shaft 8 through the sliding small shaft 10. The sliding small shaft 10 slides in the strip slide groove 16 and the inclined slide groove 17, so that the clamping block shaft 8 moves along the clamping block shaft through hole of the guide shaft seat 7, thereby driving the six clamping blocks 9 to clamp the pipe in the middle. The sliding small shaft 10 can slide in the slide grooves of the annular turntable and the clamping block shaft, thereby converting the rotational torque of the annular turntable into the driving force and clamping force for the expansion and contraction of the clamping block.

[0020] The annular turntable assembly 5 includes two annular turntables 11, which are connected by a connecting shaft 12. A plurality of support shafts 15 are connected to the outer ends of the annular turntables 11 at positions corresponding to each connecting shaft 12, and rolling bearings 13 are installed at both ends of the support shafts 15. The small rotating arm 4 is fixed on one of the annular turntables 11, and corresponding inclined slide grooves 17 are opened on the two annular turntables 11. The clamping block shaft 8 and the guide shaft seat 7 are located between the two annular turntables 11. The two annular turntables 11 are combined together by the connecting shaft 12, and rolling bearings 13 are installed at both ends of the six support shafts 15. An adjusting screw 14 is connected between the corresponding support shaft 15 and the connecting shaft 11. The position of the support shaft 15 can be adjusted by adjusting the screw 14 to ensure that there is no jamming between all 12 rolling bearings 13 and the housing slideway, thereby ensuring the smooth rotation of the turntable.

[0021] The annular housing 6 includes an annular housing body, end covers are connected to both sides of the annular housing body, the annular housing body and the end covers are connected as a whole by screws, a guide shaft seat mounting hole is opened on the annular housing body, and the avoidance groove is opened on the annular housing body. The annular turntable assembly 5 slides and rotates on the slideway inside the annular housing, and the annular housing seals the annular turntable assembly 5 and the clamping block 9 to protect the motion mechanism.

[0022] The end of the clamping block 9 is provided with an arc-shaped groove, in which a rubber block is pasted to ensure a buffering effect when clamping the product.

[0023] The two ends of the sliding shaft 10 pass through the inclined sliding grooves 17 on the two annular rotating disks 11 respectively, and the outer sides of the annular rotating disks 11 are provided with baffles and screw limiters.

[0024] The utility model is composed of a single-drive double-acting cylinder 1, a rotating arm 3, and an annular chuck 2, wherein the single-drive double-acting cylinder 1 is a standard component purchased from outside, and the rotating arm 3 is a metal machined part. Under the rotation of the single-drive double-acting cylinder 1 and the rotating arm 3, the annular turntable assembly 5 is driven to rotate, and the annular turntable assembly 5 drives the clamping block 9 through the sliding shaft 10 to achieve the telescopic clamping effect. The rotating arm 3, the annular turntable assembly 5, and the clamping block 9 transmission mechanism driven by the single-drive double-acting cylinder 1 realize stable and synchronous clamping movement. The annular chuck 2 is composed of an annular shell 6, an annular turntable assembly 5, and clamping actuators (guide shaft seat 7, sliding shaft 10, clamping block shaft 8, clamping block 9), wherein the annular shell is made of aluminum alloy (ZL101A) after casting and machining, with high overall strength and good rigidity; the rest are metal machined parts, and the processing and manufacturing process is as follows:

[0025] (1) Preparation of the annular turntable assembly 5: The two annular turntables 11 are connected into a whole by a connecting shaft 12, and the two sides of the connecting shaft 12 are locked with nuts. The support shaft 15 is installed at the outer end of the annular turntable 11, and the rolling bearings 13 are installed at both ends of the support shaft 15. In the middle of the connecting shaft 12 and the support shaft 15 is an adjusting screw 14 for adjusting the position of the rolling bearing 13.

[0026] (2) The guide shaft seat 7 is installed in the guide shaft seat installation hole on the outer circle of the annular housing body by screws.

[0027] (3) The annular turntable assembly is placed inside the annular housing 6, and the positions of the support shaft 15 and the rolling bearing 13 are adjusted by the adjusting screw 14 to ensure that the clearance between the rolling bearing 13 and the internal slideway of the annular housing is within the designed range and the annular turntable rotates smoothly.

[0028] (4) Install the clamp block shaft 8, clamp block 9 and small sliding shaft 10. The clamp block shaft 8 is inserted into the guide shaft seat 7. The top end is connected to the clamp block 9 with screws. A rubber block is pasted inside the clamp block 9 to provide buffering protection when clamping the product. The small sliding shaft 10 passes through the inclined slide groove of the annular turntable assembly 5 and the strip slide groove on the clamp block shaft 8 at the same time, and is limited by baffles and screws on both sides of the annular turntable assembly.

[0029] (5) Connect the end covers on both sides of the annular shell 6 to the shell body with screws.

[0030] (6) Finally, the piston rod joint of the single-drive double-acting cylinder 1 and the small rotating arm 4 of the annular turntable assembly 5 are connected by a pin using the rotating arm 3.

[0031] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A six-claw turntable clamping device driven by a single cylinder, characterized in that: The invention comprises a single-drive double-acting cylinder, a rotating arm and an annular chuck, wherein the annular chuck comprises an annular shell, an annular turntable assembly, a guide shaft seat, a clamping block shaft, a clamping block and a small sliding shaft, wherein the annular turntable assembly is rotatably mounted inside the annular shell, a plurality of guide shaft seats are evenly mounted on the outer circumference of the annular shell, a clamping block shaft through hole is opened on the guide shaft seat, the clamping block shaft is inserted into the clamping block shaft through hole of the guide shaft seat and extends to the inner ring of the annular shell, and one end of the clamping block shaft extending into the inner ring of the annular shell is fixedly connected with The clamping block is provided with a strip slide groove on each clamping block shaft, and an inclined slide groove corresponding to the multiple strip slide grooves is provided on the end surface of the annular turntable assembly, and the sliding small shaft is connected to the corresponding strip slide grooves and the inclined slide groove; a small rotating arm is fixed on the outer circumferential surface of the annular turntable assembly, and an avoidance groove for the small rotating arm to pass through and rotate is provided on the outer circumferential surface of the annular shell, the small rotating arm passes through the avoidance groove and is rotatably connected to one end of the rotating arm, and the other end of the rotating arm is rotatably connected to the moving end of the single-drive double-acting cylinder.

2. A six-claw turntable clamping device driven by a single cylinder according to claim 1, characterized in that: The annular turntable assembly includes two annular turntables, which are connected by a connecting shaft. A plurality of supporting shafts are connected to the outer ends of the annular turntables corresponding to the positions of each connecting shaft. Rolling bearings are installed at both ends of the supporting shafts. The small rotating arm is fixed on one of the annular turntables. Corresponding inclined grooves are opened on the two annular turntables. The clamping block shaft and the guide shaft seat are located between the two annular turntables.

3. A six-claw turntable clamping device driven by a single cylinder according to claim 2, characterized in that: An adjusting screw is connected between the corresponding supporting shaft and the connecting shaft.

4. A six-claw turntable clamping device driven by a single cylinder according to claim 1, characterized in that: The annular shell comprises an annular shell body, end covers are connected to both sides of the annular shell body, a guide shaft seat mounting hole is opened on the annular shell body, and the avoidance groove is opened on the annular shell body.

5. The six-claw turntable clamping device driven by a single cylinder according to claim 1, characterized in that: The end of the clamping block is provided with an arc-shaped groove, and a rubber block is pasted in the arc-shaped groove.

6. A six-claw turntable clamping device driven by a single cylinder according to claim 2, characterized in that: The two ends of the sliding shaft pass through the inclined sliding grooves on the two annular rotating disks respectively, and blocking pieces and screw limiters are arranged on the outer sides of the annular rotating disks.

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