Automatic centering universal chuck for full stroke

Abstract

The utility model relates to mechanical clamping mechanism technical field, concretely relates to a kind of automatic centering full stroke general chuck, including outer cylinder, inner cylinder, No.1 telescopic cylinder and No.2 telescopic cylinder, inner cylinder is located in the inside of outer cylinder, No.1 telescopic cylinder and No.2 telescopic cylinder are sleeved in the outer side surface of inner cylinder, the end face of the same side of inner cylinder and outer cylinder is commonly provided with chuck end face, four clamping jaws are slidably connected in chuck end face, No.1 telescopic cylinder is used to drive two opposite clamping jaws to move, No.2 telescopic cylinder is used to drive another two clamping jaws to move.The utility model drives two sets of clamping jaws respectively, cooperates with the intercommunication design of outer cylinder inside gas path, can self-adapting balance chuck internal air pressure, when clamping irregular shape material, the self-adapting balance of internal air pressure can ensure that each clamping jaw is formed to material steady clamping, without replacing different specifications vice claw.

Description

Technical Field

[0001] This utility model relates to the field of mechanical clamping mechanism technology, specifically to an automatic centering full-stroke universal chuck. Background Technology

[0002] In the field of mechanical manufacturing, chucks are commonly used clamping mechanisms. Currently, chucks on the market are mainly adapted to the clamping needs of regular workpieces. Most of them are unidirectional clamping or collet-type designs. When processing materials of different sizes or irregular shapes, it is necessary to change the secondary jaws of different specifications, which is cumbersome and time-consuming, and increases the cost of spare jaws.

[0003] Therefore, an automatic centering universal chuck with full stroke is proposed to solve the problems mentioned above. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides an automatic centering full-stroke universal chuck. Two sets of opposing grippers are driven by pistons one and two respectively. Combined with the design of connecting the air passages of the two pistons via air passages one and two inside the outer cylinder, the internal air pressure of the chuck can adaptively balance. When gripping irregularly shaped materials, even if the two pistons move different distances along the cylinder axis, the adaptive balance of internal air pressure ensures that each gripper provides a stable grip on the material. Unlike existing unidirectional grippers or chuck-type chucks, there is no need to frequently change different specifications of auxiliary grippers, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: It includes an outer cylinder body, an inner cylinder body, a first telescopic cylinder body, and a second telescopic cylinder body. The inner cylinder body is located inside the outer cylinder body. The first and second telescopic cylinder bodies are sleeved on the outer surface of the inner cylinder body. A first piston is fixedly connected to the outer surface of the first telescopic cylinder body, and a second piston is fixedly connected to the outer surface of the second telescopic cylinder body. The first and second telescopic cylinder bodies slide up and down along the axial direction of the inner cylinder body.

[0006] The inner cylinder and the outer cylinder share a chuck end face on the same side. Four grippers are slidably connected inside the chuck end face. The four grippers are evenly and symmetrically distributed relative to the center of the chuck end face. The first telescopic cylinder is used to drive two opposing grippers to move, and the second telescopic cylinder is used to drive the other two grippers to move.

[0007] Preferably, both the first telescopic cylinder and the second telescopic cylinder are rotatably connected to one end of a C-shaped lever on the side near the chuck end face. The other end of the C-shaped lever is slidably inserted into the bottom of the gripper, and the middle part of the C-shaped lever is fixedly connected to the chuck end face through a fixed bracket.

[0008] Preferably, the first piston is slidably connected to the inner side of the outer cylinder, and the first piston and the inner side of the outer cylinder are sealed by a sealing ring.

[0009] Preferably, the second piston is slidably connected to the inner side of the outer cylinder, and the second piston and the inner side of the outer cylinder are sealed by a sealing ring.

[0010] Preferably, the outer side wall of the outer cylinder is provided with a first air inlet and a second air inlet, and the inner side of the outer cylinder is provided with a first air passage and a second air passage. The inner end of the first air passage and the second air passage are each provided with two air outlets. The inner end of the first air passage is connected to the upper end face of the first piston and the second piston, and the inner end of the second air passage is connected to the lower end face of the first piston and the second piston.

[0011] Preferably, the end of the inner cylinder is connected to an oil filling hole, and the outer surface of the inner cylinder is provided with multiple annular grooves, and the oil filling hole and the annular grooves are connected through multiple small holes.

[0012] Preferably, one end of the C-shaped lever inserted into the bottom of the gripper has a cylindrical surface, and the diameter of the cylinder at the end of the C-shaped lever is equal to the width of the rectangular groove at the bottom of the gripper.

[0013] Compared with the prior art, this utility model provides an automatic centering full-stroke universal chuck, which has the following beneficial effects:

[0014] 1. By driving two sets of opposing grippers with pistons No. 1 and No. 2 respectively, and with the connection design of the No. 1 and No. 2 air passages inside the outer cylinder to the air passages of the two pistons, the internal air pressure of the chuck can be adaptively balanced. When gripping irregularly shaped materials, even if the two pistons move different distances along the cylinder axis, the adaptive balance of internal air pressure can ensure that each gripper firmly grips the material. Unlike existing unidirectional grippers or chuck-type chucks, there is no need to frequently change different specifications of auxiliary grippers, avoiding the problems of cumbersome operation, time consumption and increased cost of spare grippers. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0016] Figure 1 A schematic diagram of the No. 1 telescopic cylinder, No. 2 telescopic cylinder, and gripper structure provided for the automatic centering full-stroke universal chuck of this utility model;

[0017] Figure 2 A schematic diagram of the overall equiaxed side structure of the automatic centering full-stroke universal chuck of this utility model;

[0018] Figure 3 A schematic diagram of the cross-sectional structure of the No. 1 air passage provided for the automatic centering full-stroke universal chuck of this utility model;

[0019] Figure 4 A schematic diagram of the cross-sectional structure of the No. 2 air passage provided for the automatic centering full-stroke universal chuck of this utility model;

[0020] Figure 5 Schematic diagram of the piston, telescopic cylinder, and chuck end face structure provided for the automatic centering full-stroke universal chuck of this utility model.

[0021] Figure 6 Schematic diagram of the piston, telescopic cylinder, and chuck end face structure provided for the automatic centering full-stroke universal chuck of this utility model.

[0022] Figure 7 This is a schematic diagram of the outer side of the inner cylinder and the structure of the No. 2 telescopic cylinder provided for the automatic centering full-stroke universal chuck of this utility model.

[0023] In the diagram: 1. Outer cylinder; 2. Inner cylinder; 3. Telescopic cylinder No. 1; 4. Telescopic cylinder No. 2; 5. Piston No. 1; 6. Piston No. 2; 7. Chuck end face; 8. Gripper; 9. C-shaped lever; 10. Fixed bracket; 11. Air inlet No. 1; 12. Air inlet No. 2; 13. Air passage No. 1; 14. Air passage No. 2; 15. Filler hole; 16. Annular groove. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example:

[0026] Please see Figure 1 - Figure 7 This embodiment of an automatic centering full-stroke universal chuck includes an outer cylinder 1, an inner cylinder 2, a first telescopic cylinder 3, and a second telescopic cylinder 4. The inner cylinder 2 is located inside the outer cylinder 1. The first telescopic cylinder 3 and the second telescopic cylinder 4 are sleeved on the outer side of the inner cylinder 2. The first telescopic cylinder 3 and the second telescopic cylinder 4 slide up and down along the axial direction of the inner cylinder 2. The inner cylinder 2 provides sliding guidance for the first telescopic cylinder 3 and the second telescopic cylinder 4. At the same time, the first telescopic cylinder 3 and the second telescopic cylinder 4 are independently sliding.

[0027] The inner cylinder 2 and the outer cylinder 1 share a chuck end face 7 on the same side. Four grippers 8 are slidably connected inside the chuck end face 7. The four grippers 8 are evenly and symmetrically distributed relative to the center of the chuck end face 7. The first telescopic cylinder 3 is used to drive two opposing grippers 8 to move, and the second telescopic cylinder 4 is used to drive the other two grippers 8 to move. The chuck end face 7 provides a sliding track for the grippers 8. The even and symmetrical distribution of the four grippers 8 can balance the force on the workpiece during clamping, initially achieving an automatic centering effect. The design of driving the two opposing grippers 8 separately allows the two sets of grippers 8 to independently adjust the moving distance according to the shape of the material, thus adapting to irregular materials.

[0028] Both the first telescopic cylinder 3 and the second telescopic cylinder 4 are rotatably connected to one end of a C-shaped lever 9 near the chuck end face 7. The other end of the C-shaped lever 9 is slidably inserted into the bottom of the gripper 8. The middle part of the C-shaped lever 9 is fixedly connected to the chuck end face 7 through a fixed bracket 10. The fixed bracket 10 provides a fixed rotation fulcrum for the C-shaped lever 9, ensuring that the lever rotates only around the fulcrum. At the same time, the end of the C-shaped lever 9 inserted into the bottom of the gripper 8 is a cylindrical surface. The diameter of the cylinder at the end of the C-shaped lever 9 is equal to the width of the rectangular groove at the bottom of the gripper 8. The cylindrical surface and the rectangular groove are precisely matched to avoid jamming during power transmission, so that the axial movement of the telescopic cylinder can be smoothly converted into the radial movement of the gripper 8.

[0029] A piston 5 is fixedly connected to the outer side of the first telescopic cylinder 3. The piston 5 is slidably connected to the inner side of the outer cylinder 1. The piston 5 and the inner side of the outer cylinder 1 are sealed by a sealing ring. A piston 6 is fixedly connected to the outer side of the second telescopic cylinder 4. The piston 6 is slidably connected to the inner side of the outer cylinder 1. The piston 6 and the inner side of the outer cylinder 1 are sealed by a sealing ring. The sealing ring can effectively prevent gas leakage in the cylinder and ensure stable gas pressure.

[0030] Meanwhile, the outer wall of the outer cylinder 1 is provided with a first air inlet 11 and a second air inlet 12. The outer cylinder 1 is provided with a first air passage 13 and a second air passage 14. The inner end of the first air passage 13 and the second air passage 14 are provided with two air outlets. The inner end of the first air passage 13 is connected to the upper end face of the first piston 5 and the second piston 6, and the inner end of the second air passage 14 is connected to the lower end face of the first piston 5 and the second piston 6. This allows the pressure of the external air source to be transmitted synchronously to the end face of the two pistons through the air passage, driving the two pistons to move synchronously. The same air passage corresponds to two air outlets, and the two air outlets are connected inside the air passage. When clamping irregular materials, even if the two pistons move different distances along the axial direction, the connection characteristics of the air passage can adaptively balance the internal air pressure, ensuring that the grippers 8 driven by the two pistons can apply sufficient clamping force to the material. There is no need to frequently change the secondary grippers of different specifications as with existing chucks.

[0031] In addition, the inner cylinder 2 has an oil filling hole 15 at its end, and multiple annular grooves 16 are provided on the outer side of the inner cylinder 2. The oil filling hole 15 and the annular grooves 16 are connected through multiple small holes. During routine maintenance, the staff can directly inject lubricating oil through the oil filling hole 15. The lubricating oil flows evenly into the annular grooves 16 through the small holes. The annular grooves 16 are in close contact with the inner side of the first and second telescopic cylinders 4. During the sliding process of the telescopic cylinders, the lubricating oil evenly covers the sliding contact surface of the two, and maintenance can be completed without disassembling the chuck, thus improving maintenance efficiency.

[0032] The working principle of the above embodiment is as follows: An external air source is connected to the first air inlet 11 and the second air inlet 12 of the outer cylinder 1 through a pipeline, and both the air inlet and outlet are connected to an external solenoid valve. The solenoid valve controls the opening and closing of the air path. When it is necessary to clamp the workpiece, if it is an external clamping, the solenoid valve controls the second air inlet 12 to supply air. The gas is transmitted to the lower end faces of the first piston 5 and the second piston 6 through the two air outlets of the second air passage 14, respectively. The air pressure pushes the two pistons to slide upward along the inner side of the outer cylinder 1, and the piston drives the corresponding first piston 5. Telescopic cylinder 3 and telescopic cylinder 4 move upward along the axis of inner cylinder 2. The telescopic cylinder pulls C-type lever 9 to rotate around the fulcrum of fixed bracket 10. The other end of C-type lever 9 pushes gripper 8 to slide along chuck end face 7 and move outward. If it is internal clamping, the solenoid valve controls the first air inlet 11 to ventilate. The gas is transmitted to the upper end face of the two pistons through the two air outlets of the first air passage 13, pushing the piston and telescopic cylinder to move downward. C-type lever 9 pushes gripper 8 to slide along chuck end face 7 and converge towards the center, finally clamping the workpiece.

[0033] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods. As long as they can achieve their beneficial effects, they can be implemented. Therefore, this embodiment will not elaborate on their specific structural composition and working principle.

[0034] If certain terms are used in the specification and claims to refer to specific components, those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" as used throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to".

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A universal chuck with automatic centering and full stroke, characterized in that: It includes an outer cylinder (1), an inner cylinder (2), a first telescopic cylinder (3), and a second telescopic cylinder (4). The inner cylinder (2) is located inside the outer cylinder (1). The first telescopic cylinder (3) and the second telescopic cylinder (4) are sleeved on the outer side of the inner cylinder (2). A first piston (5) is fixedly connected to the outer side of the first telescopic cylinder (3), and a second piston (6) is fixedly connected to the outer side of the second telescopic cylinder (4). The first telescopic cylinder (3) and the second telescopic cylinder (4) slide up and down along the axial direction of the inner cylinder (2). The inner cylinder (2) and the outer cylinder (1) share a chuck end face (7) on the same side. Four jaws (8) are slidably connected in the chuck end face (7). The four jaws (8) are evenly and symmetrically distributed relative to the center of the chuck end face (7). The first telescopic cylinder (3) is used to drive two opposing jaws (8) to move, and the second telescopic cylinder (4) is used to drive the other two jaws (8) to move.

2. The automatic centering full-stroke universal chuck according to claim 1, characterized in that: Both the first telescopic cylinder (3) and the second telescopic cylinder (4) are rotatably connected to one end of a C-shaped lever (9) on the side near the chuck end face (7). The other end of the C-shaped lever (9) is slidably inserted into the bottom of the jaw (8). The middle part of the C-shaped lever (9) is fixedly connected to the chuck end face (7) through a fixed bracket (10).

3. The automatic centering full-stroke universal chuck according to claim 1, characterized in that: The first piston (5) is slidably connected to the inner side of the outer cylinder (1), and the first piston (5) and the inner side of the outer cylinder (1) are sealed by a sealing ring.

4. The automatic centering full-stroke universal chuck according to claim 1, characterized in that: The second piston (6) is slidably connected to the inner side of the outer cylinder (1), and the second piston (6) and the inner side of the outer cylinder (1) are sealed by a sealing ring.

5. The automatic centering full-stroke universal chuck according to claim 1, characterized in that: The outer cylinder body (1) has a first air inlet (11) and a second air inlet (12) on its outer side wall. The outer cylinder body (1) has a first air passage (13) and a second air passage (14) inside. The inner ends of the first air passage (13) and the second air passage (14) are each provided with two air outlets. The inner end of the first air passage (13) is connected to the upper end face of the first piston (5) and the second piston (6). The inner end of the second air passage (14) is connected to the lower end face of the first piston (5) and the second piston (6).

6. The automatic centering full-stroke universal chuck according to claim 1, characterized in that: The inner cylinder (2) has an oil filling hole (15) at one end, and the outer side of the inner cylinder (2) has multiple annular grooves (16). The oil filling hole (15) and the annular grooves (16) are connected through multiple small holes.

7. The automatic centering full-stroke universal chuck according to claim 2, characterized in that: The end of the C-shaped lever (9) inserted into the bottom of the gripper (8) is a cylindrical surface, and the diameter of the cylinder at the end of the C-shaped lever (9) is equal to the width of the rectangular groove at the bottom of the gripper (8).

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