Double stroke drive chuck

Abstract

The application discloses a double-stroke driving chuck and relates to the technical field of driving chucks.The double-stroke driving chuck comprises a chuck body, a large disc arranged on the chuck body, a panel placed on the front side of the large disc, four air cylinders fixedly installed on the large disc, a lower rack and two guide rails fixedly installed on the upper portion of the air cylinders, the two guide rails being arranged in parallel and the lower rack being located between the two guide rails, a sliding seat placed on the upper portion of the air cylinder, an upper rack and two sliding blocks fixedly installed on the lower portion of the sliding seat, and the upper rack being located between the two sliding blocks.The principle of the gear and rack'speed multiplication mechanism' is used to make the stroke ratio of the air cylinder piston rod and the roller be 1:2, so that the double-stroke effect is achieved.The design makes the chuck have a larger clamping range for workpieces, the long air cylinder does not need to be installed on the chuck, the outer diameter of the chuck does not need to be increased, therefore, the rotational inertia of the chuck is not increased, and the rotational speed of the chuck is not affected while the clamping stroke of the workpiece is increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of driving chuck, in particular to a double stroke driving chuck. BACKGROUND

[0002] The chuck is used for clamping the workpiece in the cutting process of the workpiece. In the prior art, the chuck clamps the workpiece through the roller, and the roller is driven by the piston rod of the air cylinder. The stroke ratio of the piston rod of the air cylinder to the stroke of the roller is 1:1, that is, the piston rod of the air cylinder extends outward by 10 cm, and the stroke of the roller clamped inward is also 10 cm. When it is necessary to increase the clamping stroke of the workpiece, a longer piston rod is required, that is, the air cylinder needs to be designed longer. However, with the increase of the length of the air cylinder, the outer diameter of the chuck also needs to be increased, thereby increasing the moment of inertia of the chuck and affecting the rotation speed of the chuck.

[0003] The front chuck of the current laser pipe cutting machine is generally designed as full stroke, for example, the clamping range is 10-100, and the roller can cover the movement range from 10 to 100 through one action of the air cylinder. Whether the workpiece of the customer is 20 or 80, it can be clamped, reducing the trouble of the customer adjusting the roller. However, the full stroke means that the stroke of the air cylinder must be large enough, for example, the clamping range is 10-100, and the stroke of the air cylinder is 45. Therefore, the rotating diameter of the chuck must be large enough, which makes the moment of inertia of the chuck large, the requirement of the motor of the speed reducer is high, the rotation of the chuck is not flexible enough, and the cutting efficiency is affected. SUMMARY

[0004] The purpose of the present application is to provide a double stroke driving chuck, which adopts a speed increasing mechanism to make the stroke of the roller twice that of the air cylinder, thereby ensuring the full stroke of the roller clamping and minimizing the rotating diameter of the chuck and reducing the moment of inertia.

[0005] To achieve the above purpose, the present application provides the following technical scheme: a double stroke driving chuck, comprising a chuck body, a large disc is arranged on the chuck body, a front side of the large disc is provided with a panel, four air cylinders are fixedly installed on the large disc, a lower rack and two guide rails are fixedly installed on the upper part of the air cylinder, the two guide rails are arranged in parallel, and the lower rack is located between the two guide rails, a sliding seat is arranged on the upper part of the air cylinder, an upper rack and two sliding blocks are fixedly installed on the lower part of the sliding seat, the upper rack is located between the two sliding blocks, the sliding seat is slidably installed on the two guide rails through the two sliding blocks, a pushing seat is fixedly installed on the piston rod of the air cylinder, a gear is rotatably installed on the pushing seat, the lower rack and the upper rack are located on the two sides of the gear, and the lower rack and the upper rack are in meshing connection with the gear.

[0006] Four clamping holes are formed in the panel, and four clamping grooves are fixedly installed on the panel, the lower part of the clamping groove is provided with a sliding hole corresponding to the clamping hole, a clamping sliding block is slidably installed in the clamping groove, a roller frame is fixedly installed on the upper part of the clamping sliding block, a roller is installed on the roller frame, a clamping column is fixedly installed on the upper part of the sliding seat, the clamping column passes through the clamping hole and the sliding hole in sequence and is fixedly connected with the clamping sliding block, an inner side centering disc and an outer side centering disc are sequentially arranged on the rear side of the panel, two center-symmetric arc-shaped centering holes are formed in the inner side centering disc and the outer side centering disc, four arc-shaped guide holes are formed in the inner side centering disc and the outer side centering disc in a circumferential direction, four guide columns are fixedly installed between the disc and the panel, the four guide columns correspond to the four guide holes respectively, the guide columns pass through the guide holes in the inner side centering disc and the outer side centering disc respectively, the clamping columns on the upper side and the lower side pass through the two centering holes in the outer side centering disc, and the clamping columns on the left side and the right side pass through the two centering holes in the inner side centering disc.

[0007] Further, the clamping hole is a long strip structure.

[0008] Further, the air cylinder is a double-cylinder air cylinder.

[0009] Further, an auxiliary wheel seat is arranged on the roller frame, an auxiliary wheel frame is arranged on the auxiliary wheel seat, and an auxiliary wheel is arranged on the auxiliary wheel frame.

[0010] Further, the circumferential surfaces of the auxiliary wheels on the upper side and the lower side are located on the same plane as the circumferential surfaces of the rollers on the upper side and the lower side respectively, and the circumferential surfaces of the auxiliary wheels on the left side and the right side are located on the same plane as the circumferential surfaces of the rollers on the left side and the right side respectively.

[0011] Further, a long strip-shaped mounting hole is formed in the auxiliary wheel seat.

[0012] Further, an adjusting seat is arranged on the outer side of the auxiliary wheel seat, the adjusting seat is fixedly installed on the roller frame, an adjusting hole is formed in the adjusting seat, and a bolt is installed in the adjusting hole.

[0013] Further, two single-acting air cylinders are arranged on the roller frames on the left side and the right side respectively, and a clamping plate is fixedly installed on the piston rod of each single-acting air cylinder.

[0014] Further, two bearings are fixedly installed on the roller frames on the left side and the right side respectively, guide rods are movably installed on the bearings, and the guide rods are fixedly installed on the clamping plates on the same side.

[0015] Further, a rack groove adapted to the upper rack is formed in the upper part of the pushing seat, and a rack hole adapted to the lower rack is formed in the pushing seat.

[0016] Further, the outer side between the large disc and the panel is provided with a dust cover, and the inner side between the large disc and the panel is provided with a dust cylinder.

[0017] In summary, the technical effects and advantages of the present application are:

[0018] In the present application, by means of the principle of gear and rack "speed increasing mechanism", the stroke ratio of the cylinder piston rod and the roller is 1:2, so as to realize the effect of double stroke. This design makes the clamping range of the chuck larger, and does not need to install a longer cylinder on the chuck. The outer diameter of the chuck does not need to be increased, so the rotational inertia of the chuck will not be increased, and the rotation speed of the chuck will not be affected when the clamping stroke of the workpiece is increased. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior description will be briefly introduced as follows.

[0020] Figure 1 It is a perspective structural schematic view of a double-stroke driving chuck in an embodiment of the present application.

[0021] Figure 2 It is a position relationship diagram of a large disc, a dust cylinder, a panel and a roller frame in an embodiment of the present application.

[0022] Figure 3 It is a position relationship diagram of a large disc, a guide column, a cylinder and a sliding seat in an embodiment of the present application.

[0023] Figure 4 It is a connection relationship diagram of a cylinder, a guide rail, a sliding seat and a sliding block in an embodiment of the present application.

[0024] Figure 5 It is a partial structural schematic view of Figure 4 in an embodiment of the present application.

[0025] Figure 6 It is another view of Figure 4 in an embodiment of the present application.

[0026] Figure 7 It is a position relationship diagram of a sliding seat, a clamping column, a clamping groove and a roller frame in an embodiment of the present application.

[0027] Figure 8 It is a partial structural schematic view of Figure 7 in an embodiment of the present application.

[0028] Figure 9 It is a position relationship diagram of an inner centering disc and an outer centering disc in an embodiment of the present application.

[0029] Figure 10 This is a schematic diagram of the panel structure in an embodiment of this application;

[0030] Figure 11 This is a diagram showing the positional relationship between the panel, clamping groove, roller frame, and clamping plate in the embodiments of this application;

[0031] Figure 12 Examples of embodiments in this application Figure 11 A partial structural diagram.

[0032] In the diagram: 1. Chuck body; 2. Large disc; 3. Guide post; 4. Cylinder; 5. Panel; 6. Guide rail; 7. Lower rack; 8. Sliding seat; 9. Slider; 10. Upper rack; 11. Push seat; 12. Gear; 13. Clamping hole; 14. Clamping groove; 15. Sliding hole; 16. Clamping slider; 17. Roller frame; 18. Roller; 19. Clamping column; 20. Inner centering disc; 21. Outer centering disc; 22. Centering hole; 23. Guide hole; 24. Auxiliary wheel seat; 25. Auxiliary wheel frame; 26. Auxiliary wheel; 27. Adjusting seat; 28. Single-acting cylinder; 29. ​​Clamping plate; 30. Bearing; 31. Guide rod; 32. Rack groove; 33. Rack hole; 34. Dust cover; 35. Dust cylinder. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0034] Example: Reference Figures 1-12 A double-stroke driven chuck is shown, including a chuck body 1, a large plate 2 on the chuck body 1, a panel 5 on the front side of the large plate 2, four cylinders 4 fixedly mounted on the large plate 2, a lower rack 7 and two guide rails 6 fixedly mounted on the upper part of the cylinder 4, the two guide rails 6 are arranged in parallel, and the lower rack 7 is located between the two guide rails 6. A sliding seat 8 is placed on the upper part of the cylinder 4, an upper rack 10 and two sliders 9 are fixedly mounted on the lower part of the sliding seat 8, the upper rack 10 is located between the two sliders 9, and the sliding seat 8 is slidably mounted on the two guide rails 6 through the two sliders 9. A push seat 11 is fixedly mounted on the piston rod of the cylinder 4, and a gear 12 is rotatably mounted on the push seat 11. The lower rack 7 and the upper rack 10 are located on both sides of the gear 12, and both the lower rack 7 and the upper rack 10 mesh with the gear 12.

[0035] Four clamping holes 13 in long strip structure are formed on the panel 5, and four clamping grooves 14 are fixedly installed on the panel 5, the lower part of the clamping groove 14 is provided with a sliding hole 15 corresponding to the clamping hole 13, the clamping sliding block 16 is slidingly installed in the clamping groove 14, the upper part of the clamping sliding block 16 is fixedly installed with a roller frame 17, the roller frame 17 is installed with a roller 18, which is used to clamp the workpiece, the air cylinder 4 is a double cylinder, which can improve the clamping force of the roller 18 and can more smoothly push the roller 18, the clamping column 19 is fixedly installed on the upper part of the sliding seat 8, and the clamping column 19 passes through the clamping hole 13 and the sliding hole 15 in sequence and is fixedly connected with the clamping sliding block 16;

[0036] When the piston rod of the air cylinder 4 extends, the piston rod drives the push seat 11, the push seat 11 drives the gear 12 to move along the lower rack 7 to the center direction of the chuck, the gear 12 moves at the same time, driving the upper rack 10 to move in the same direction, the upper rack 10 drives the sliding seat 8, the clamping column 19, the clamping sliding block 16 and the roller frame 17 to move at the same time, clamping the workpiece;

[0037] According to the principle of gear and rack "speed mechanism", the stroke ratio of the piston rod of the air cylinder 4 and the upper rack 10 is 1:2, that is, the stroke of the piston rod of the air cylinder 4 is 10cm, and the stroke of the upper rack 10 is 20cm, the piston rod of the air cylinder 4 only needs a stroke of 10cm, that is, the stroke of the roller frame 17 and the roller 18 is 20cm, so as to realize the effect of double stroke, which can clamp a larger range of workpieces, and does not need a longer air cylinder 4, and the outer diameter of the chuck does not need to be larger, so as not to increase the moment of inertia of the chuck, and not to affect the rotating speed of the chuck;

[0038] In order to make the four roller frames 17 move synchronously when clamping the workpiece, realize the centering effect, the rear side of the panel 5 is sequentially provided with an inner side centering disc 20 and an outer side centering disc 21, two center symmetric arc centering holes 22 are formed on the inner side centering disc 20 and the outer side centering disc 21, and four arc guide holes 23 are formed on the inner side centering disc 20 and the outer side centering disc 21, four guide columns 3 are fixedly installed between the large disc 2 and the panel 5, the four guide columns 3 correspond to the four guide holes 23 respectively, and the guide columns 3 pass through the guide holes 23 on the inner side centering disc 20 and the outer side centering disc 21 respectively, when the outer side centering disc 21 and the inner side centering disc 20 rotate, the four guide columns 3 can play a guiding role, so that the two centering discs rotate along the circumferential direction;

[0039] The upper and lower clamping columns 19 pass through two pairs of centering holes 22 on the outer centering disc 21, and under the action of the centering holes 22, the upper and lower clamping columns 19 can be synchronized and centered when moving, so that the upper and lower roller frames 17 can also realize the effect of synchronously and centrally clamping the workpiece when moving. The left and right clamping columns 19 pass through two pairs of centering holes 22 on the inner centering disc 20, and under the action of the centering holes 22, the left and right clamping columns 19 can be synchronized and centered when moving, so that the left and right roller frames 17 can also realize the effect of synchronously and centrally clamping the workpiece when moving.

[0040] The roller frame 17 is provided with an auxiliary wheel seat 24, the auxiliary wheel seat 24 is provided with an auxiliary wheel frame 25, the auxiliary wheel frame 25 extends to the front of the chuck body 1, and the auxiliary wheel frame 25 is provided with an auxiliary wheel 26. When the four roller frames 17 move, the corresponding auxiliary wheel frame 25 and the auxiliary wheel 26 can be driven to move synchronously;

[0041] The circumferential surfaces of the upper and lower auxiliary wheels 26 are located on the same plane as the circumferential surfaces of the upper and lower rollers 18, and the circumferential surfaces of the left and right auxiliary wheels 26 are located on the same plane as the circumferential surfaces of the left and right rollers 18. Therefore, when the four rollers 18 clamp the workpiece, the four corresponding auxiliary wheels 26 can be driven to clamp the workpiece synchronously;

[0042] Since the auxiliary wheel frame 25 extends to the front of the chuck body 1, the clamping position of the four auxiliary wheels 26 on the workpiece has a certain distance from the clamping position of the four rollers 18 on the workpiece, which is equivalent to clamping the workpiece from two endpoints. Since the workpiece is long, clamping only by the roller 18 is prone to deviation, therefore, by increasing the clamping of the auxiliary wheel 26, the angular deviation of the workpiece during clamping can be reduced, and the machining precision can be improved;

[0043] The auxiliary wheel seat 24 is provided with an elongated mounting hole for fixedly mounting the auxiliary wheel frame 25 on the roller frame 17. Because there is often an error in processing the auxiliary wheel seat 24 and the auxiliary wheel frame 25, if the mounting hole is circular, the position of the auxiliary wheel 26 cannot be adjusted. Because the auxiliary wheel 26 moves synchronously with the roller 18, the circumferential surface of the auxiliary wheel 26 needs to be located on the same plane as the circumferential surface of the corresponding roller 18 to achieve the clamping effect on the workpiece. If the mounting hole is a circular hole, once there is an error in the processing of the auxiliary wheel seat 24 and the auxiliary wheel frame 25, the auxiliary wheel 26 cannot clamp the workpiece, and cannot avoid the angular deviation of the workpiece. Therefore, in order to facilitate the adjustment of the position of the auxiliary wheel 26 during installation, the mounting hole is designed as an elongated shape.

[0044] The outer side of the auxiliary wheel seat 24 is provided with an adjusting seat 27 which is fixedly installed on the roller frame 17, the adjusting seat 27 is provided with an adjusting hole, a bolt is installed in the adjusting hole, and the bolt can contact the auxiliary wheel seat 24. When the auxiliary wheel seat 24 is installed or used for a certain period of time, if the circumferential surface of the auxiliary wheel 26 cannot be in the same plane as the circumferential surface of the roller 18, the bolt can push against the auxiliary wheel seat 24 to adjust the position of the auxiliary wheel seat 24, so that the circumferential surface of the auxiliary wheel 26 and the circumferential surface of the roller 18 are in the same plane, and the workpiece can be clamped;

[0045] The left and right roller frames 17 are each provided with two single-acting cylinders 28, the piston rods of the two single-acting cylinders 28 on the same side are fixedly installed with clamping plates 29, the single-acting cylinder 28 has only one air inlet, and the piston rod is retracted in the absence of air. When air enters, the piston rod extends outward. Unlike ordinary cylinders which need to be provided with two air paths, the single-acting cylinder 28 only needs to be provided with one air path, that is, the clamping of the workpiece can be achieved, so that the complexity of the chuck air path is reduced, and the structure is simplified.

[0046] The clamping plate 29 is used for clamping the tail of the workpiece, the inner side wall of the clamping plate 29 is provided with a texture for increasing friction, so that the workpiece can be provided with better clamping force. When the chuck is in a non-working state, the distance between the clamping plate 29 and the center of the chuck is greater than the distance between the roller 18 and the center of the chuck. Therefore, when the clamping plate 29 does not need to clamp the workpiece, the workpiece can be clamped only by the roller 18, and the clamping plate 29 will not contact the workpiece and will not affect the movement of the workpiece along the roller 18. When the tail of the workpiece needs to be processed, the single-acting cylinder 28 drives the clamping plate 29 to clamp the workpiece. At this time, the laser head will move to the rear of the front chuck for processing, and the rear chuck has been reset and cannot clamp the workpiece. Through the action of the clamping plate 29, the horizontal movement of the front chuck when rotating while clamping the workpiece can be avoided, the processing precision is improved, and the waste of the tail is reduced. Moreover, the clamping plate 29 is located in the front part of the front chuck and will not affect the processing of the rear laser head.

[0047] The left and right roller frames 17 are each fixedly installed with two bearings 30, the bearings 30 are movably installed with guide rods 31, and the two guide rods 31 are fixedly installed on the clamping plates 29 on the same side. When the two single-acting cylinders 28 drive the clamping plates 29, the two guide rods 31 can play a guiding and synchronizing role, so that the two single-acting cylinders 28 can drive the clamping plates 29 in a parallel direction, thereby achieving better synchronous clamping effect on the workpiece.

[0048] The upper part of the pushing seat 11 is provided with a rack groove 32 matched with the upper rack 10, which is used to provide a moving space for the upper rack 10. The pushing seat 11 is provided with a rack hole 33 matched with the lower rack 7, which is used to provide a moving space for the lower rack 7.

[0049] The outer side between the large disc 2 and the panel 5 is provided with a dust cover 34 for avoiding the influence of the debris generated in the machining process on the chuck device, and the inner side between the large disc 2 and the panel 5 is provided with a dust cylinder 35 for avoiding the influence of the debris generated in the machining process on the chuck device.

[0050] The working principle of the present application is as follows:

[0051] By means of the principle of the gear and rack "speed multiplier mechanism", the stroke ratio of the piston rod of the air cylinder 4 to the roller 18 is 1:2, so as to realize the effect of double stroke. The design makes the clamping range of the chuck on the workpiece larger, and the air cylinder 4 does not need to be installed on the chuck, and the outer diameter of the chuck does not need to be increased, so that the rotational inertia of the chuck will not be increased, and the rotational speed of the chuck will not be affected when the stroke of the clamped workpiece is increased.

[0052] The following purposes are achieved: the rotational inertia of the chuck is minimized, and the speed multiplier mechanism is used to drive the roller 18 to move the full stroke with a smaller stroke of the air cylinder 4.

[0053] Finally, it should be noted that: the above only describes the preferred embodiments of the present application and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A double stroke drive chuck comprising a chuck body, characterized by: The chuck body is provided with a large disc, the front side of the large disc is provided with a panel, four air cylinders are fixedly installed on the large disc, the air cylinders are double-cylinder air cylinders, a lower rack and two guide rails are fixedly installed on the upper part of the air cylinders, the two guide rails are arranged in parallel, the lower rack is located between the two guide rails, a sliding seat is arranged on the upper part of the air cylinders, an upper rack and two sliding blocks are fixedly installed on the lower part of the sliding seat, the upper rack is located between the two sliding blocks, the stroke ratio of the air cylinder piston rod to the upper rack is 1:2, the sliding seat is slidably installed on the two guide rails through the two sliding blocks, a pushing seat is fixedly installed on the piston rod of the air cylinder, a rack groove matched with the upper rack is formed in the upper part of the pushing seat, a rack hole matched with the lower rack is formed in the pushing seat, a gear is rotatably installed on the pushing seat, the lower rack and the upper rack are located on the two sides of the gear, and the lower rack and the upper rack are in meshing connection with the gear. Four clamping holes are formed in the panel, four clamping grooves are fixedly installed on the panel, a sliding hole corresponding to the clamping hole is formed in the lower part of each clamping groove, a clamping sliding block is slidably installed in the clamping groove, a roller frame is fixedly installed on the upper part of the clamping sliding block, a roller is installed on the roller frame, a clamping stand is fixedly installed on the upper part of the sliding seat, the clamping stand passes through the clamping hole and the sliding hole in sequence and is fixedly connected with the clamping sliding block, an inner side centering disc and an outer side centering disc are sequentially arranged on the rear side of the panel, two center-symmetric arc-shaped centering holes are formed in the inner side centering disc and the outer side centering disc, four arc-shaped guide holes arranged in the circumferential direction are formed in the inner side centering disc and the outer side centering disc, four guide columns are fixedly installed between the large disc and the panel, the four guide columns correspond to the four guide holes respectively, the guide columns pass through the guide holes in the inner side centering disc and the outer side centering disc respectively, the upper side and the lower side clamping stands pass through the two centering holes in the outer side centering disc respectively, the left side and the right side clamping stands pass through the two centering holes in the inner side centering disc respectively, an auxiliary wheel seat is arranged on the roller frame, an auxiliary wheel frame is arranged on the auxiliary wheel seat, an auxiliary wheel is arranged on the auxiliary wheel frame, the circumferential surfaces of the upper side and the lower side auxiliary wheels are located on the same plane as the circumferential surfaces of the upper side and the lower side rollers respectively, the circumferential surfaces of the left side and the right side auxiliary wheels are located on the same plane as the circumferential surfaces of the left side and the right side rollers respectively, two single-acting air cylinders are arranged on each of the left side and the right side roller frames, a clamping plate is fixedly installed on the piston rod of each single-acting air cylinder.

2. A double stroke drive chuck according to claim 1, characterized in that: The clamping hole has an elongated structure.

3. A double stroke drive chuck in accordance with claim 1 wherein: An elongated mounting hole is formed in the auxiliary wheel seat.

4. A double stroke drive chuck in accordance with claim 1 wherein: An adjusting seat is arranged on the outer side of the auxiliary wheel seat, the adjusting seat is fixedly installed on the roller frame, an adjusting hole is formed in the adjusting seat, and a bolt is installed in the adjusting hole.

5. A double stroke drive chuck in accordance with claim 1 wherein: Two bearings are fixedly installed on each of the left side and the right side roller frames, a guide rod is movably installed on each bearing, and the two guide rods are fixedly installed on the clamping plate on the same side.

6. A double stroke drive chuck in accordance with claim 1 wherein: A dust cover is arranged on the outer side between the large disc and the panel, and a dust cylinder is arranged on the inner side between the large disc and the panel.

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