Heavy-load pneumatic finger capable of achieving super-long force arm clamping

Abstract

The utility model belongs to the technical field of pneumatic actuators, and particularly relates to a heavy-load pneumatic finger capable of realizing super-long force arm clamping, which comprises a piston cylinder and a piston rod, the piston rod is telescopically arranged in the piston cylinder and extends out of the front end of the piston cylinder, the front end of the piston cylinder is provided with an inverted T-shaped groove, the outer end of the piston rod is provided with an inclined wedge block, and the inclined wedge block is arranged in the inverted T-shaped groove. The wedge block is located in the middle of the inverted-T-shaped groove, a left finger block and a right finger block are arranged in two side grooves of the inverted-T-shaped groove, the left finger block and the right finger block are slidably connected with the inverted-T-shaped groove in a matched mode, and the left finger block and the right finger block are matched with the wedge-shaped structure of the wedge block at the ends corresponding to the wedge block. And the piston rod can drive the left finger block and the right finger block to slide in the inverted T-shaped groove. The pneumatic finger aims at solving the technical problems that an existing pneumatic finger is small in clamping force and torque and cannot be used under the heavy working condition.

Description

Technical Field

[0001] The utility model belongs to the technical field of pneumatic actuators, and in particular relates to a heavy-load pneumatic finger capable of achieving ultra-long force arm clamping. Background Art

[0002] With the continuous development of the economy and science and technology, as well as the continuous increase in labor costs, industrial enterprises' processing production lines, assembly lines, mechanical fixtures, product testing and other fields have increasingly demanded higher process concentration due to the precision and mechanical characteristics of the products themselves and the requirements for large-scale production. This has also led to higher performance requirements for the supporting pneumatic actuators. For example, on automated automotive production lines, how to solve the problem of clamping wheel hubs and motors under heavy loads has always been an industry problem. Solving this problem can greatly improve the level of automobile manufacturing and product quality. Currently, most pneumatic actuators use pneumatic fingers, which have relatively low clamping force and torque. However, when handling heavier clamping objects, the torque requirements of the air gripper during operation are relatively high, which makes most air grippers unable to meet the requirements for use in heavier working conditions. Utility Model Content

[0003] The purpose of this utility model is to propose a heavy-duty pneumatic finger that can achieve ultra-long force arm clamping, aiming to solve the technical problem that the clamping force and torque of existing pneumatic fingers are small and cannot meet the requirements of use under heavier working conditions.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A heavy-duty pneumatic finger capable of achieving ultra-long lever arm clamping comprises a piston cylinder and a piston rod, wherein the piston rod is telescopically arranged in the piston cylinder and extends out from the front end of the piston cylinder, the front end of the piston cylinder is provided with an inverted T-shaped groove, and the outer end of the piston rod is provided with an inclined wedge block, the inclined wedge block is located in the middle of the inverted T-shaped groove, and a left finger block and a right finger block are provided in the grooves on both sides of the inverted T-shaped groove, the left finger block and the right finger block are slidably adapted to be connected with the inverted T-shaped groove, and the left finger block and the right finger block cooperate with the wedge-shaped structure of the inclined wedge block at the ends corresponding to the inclined wedge block, so that the piston rod can drive the left finger block and the right finger block to slide in the inverted T-shaped groove.

[0006] Furthermore, the piston rod includes a rod body and a piston arranged at the rear end of the rod body, an air cavity is provided in the piston cylinder, the piston is arranged in the air cavity, and also includes a compression spring group, the compression spring group is arranged in the air cavity on the front side of the piston, or the compression spring group is arranged in the air cavity on the rear side of the piston.

[0007] Furthermore, the wedge-shaped structure includes an I-shaped groove provided on the inclined wedge block and a T-shaped groove provided on the left finger block and the right finger block, and the left finger block and the right finger block are connected to the inclined wedge block through the T-shaped groove and the I-shaped groove.

[0008] Furthermore, the compression spring group includes a first compression spring, a second compression spring, a third compression spring, a fourth compression spring and a fifth compression spring. The diameters of the first compression spring, the second compression spring, the third compression spring, the fourth compression spring and the fifth compression spring increase successively and are arranged on each other. The piston and the piston cylinder are respectively provided with corresponding first spring limiting grooves, second spring limiting grooves, third spring limiting grooves, fourth spring limiting grooves and fifth spring limiting grooves. The ends of the first compression spring, the second compression spring, the third compression spring, the fourth compression spring and the fifth compression spring are respectively arranged in the corresponding first spring limiting grooves, second spring limiting grooves, third spring limiting grooves, fourth spring limiting grooves and fifth spring limiting grooves.

[0009] Furthermore, the piston is configured to be elliptical.

[0010] Furthermore, an oil hole is provided on the left finger block and the right finger block, one end of the oil hole is connected to an oil cup, and the other end of the oil hole is connected to the T-shaped slide groove.

[0011] Furthermore, a magnet is provided on the piston, and a magnetic switch is provided on the piston cylinder at the rear end of the air cavity. When the piston moves in the air cavity, the magnet approaches or moves away from the magnetic switch, causing the magnetic switch to open or close.

[0012] Furthermore, the piston cylinder includes a front cylinder body and a rear cylinder body, the front cylinder body and the rear cylinder body are relatively closed to form the piston cylinder, the air cavity part is provided on the front cylinder body, and the remaining part is provided on the rear cylinder body.

[0013] The pneumatic fingers of the utility model are designed with a 90° angle between the movement direction of the piston rod and the finger block, and the motion and torque are transmitted through a wedge-shaped structure, thereby sacrificing the clamping stroke to increase the clamping force. Therefore, it can withstand greater torque than existing pneumatic fingers, realizing the problem of handling larger materials and assembling larger workpieces when using pneumatic fingers.

[0014] Other features and advantages of the present invention will be described in detail in the subsequent detailed description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A three-dimensional diagram of a heavy-duty pneumatic finger capable of achieving ultra-long arm clamping provided by an embodiment of the present utility model;

[0016] Figure 2 A top perspective view of the front cylinder of a heavy-duty pneumatic finger capable of achieving ultra-long lever arm clamping provided by an embodiment of the present utility model;

[0017] Figure 3 A bottom perspective view of the front cylinder of a heavy-duty pneumatic finger capable of achieving ultra-long lever arm clamping provided by an embodiment of the present utility model;

[0018] Figure 4 A cross-sectional view of a heavy-duty pneumatic finger capable of achieving ultra-long arm clamping provided by an embodiment of the present utility model;

[0019] Figure 5 A three-dimensional diagram of a piston rod of a heavy-duty pneumatic finger capable of achieving ultra-long lever arm clamping provided by an embodiment of the present utility model;

[0020] Figure 6 A top perspective view of the left finger block of a heavy-duty pneumatic finger capable of achieving ultra-long lever arm clamping provided by an embodiment of the present utility model;

[0021] Figure 7 A bottom-up stereoscopic view of a heavy-duty pneumatic finger capable of achieving ultra-long lever arm clamping provided in an embodiment of the present utility model.

[0022] The names and numbers of the components in the figure are:

[0023] 2. Rod body; 3. First compression spring; 4. Second compression spring; 5. Third compression spring; 6. Fourth compression spring; 7. Fifth compression spring; 10. Piston cylinder; 11. Front cylinder body; 12. Rear cylinder body; 13. Inverted T-slot; 14. Air cavity; 20. Oblique wedge block; 21. Left finger block; 22. Right finger block; 30. Piston; 31. First spring limiting groove; 32. Second spring limiting groove; 33. Third spring limiting groove; 34. Fourth spring limiting groove; 35. Fifth spring limiting groove; 40. Oil hole; 41. Oil cup; 201. I-shaped slide groove; 211. T-shaped slide groove. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0025] Please refer to the attached Figure 1-7As shown, an embodiment of the present invention provides a heavy-duty pneumatic finger that can achieve ultra-long lever arm clamping, including a piston cylinder 10 and a piston rod, the piston rod is telescopically arranged in the piston cylinder 10 and extends out of the front end of the piston cylinder 10, the front end of the piston cylinder 10 is provided with an inverted T-shaped slot 13, and the outer end of the piston rod is provided with an inclined wedge block 20, which is located in the middle of the inverted T-shaped slot 13, and the left finger block 21 and the right finger block 22 are provided in the grooves on both sides of the inverted T-shaped slot 13, the left finger block 21 and the right finger block 22 are slidably adapted to be connected with the inverted T-shaped slot 13, and the left finger block 21 and the right finger block 22 cooperate with the wedge structure of the inclined wedge block 20 at the ends corresponding to the oblique wedge block 20, so that the piston rod can drive the left finger block 21 and the right finger block 22 to slide in the inverted T-shaped slot 13. The piston rod and the finger block are designed to form a 90° angle in their movement direction, and the wedge structure is used to transmit motion and torque, thereby sacrificing the clamping stroke to increase the clamping force. Therefore, it can withstand greater torque than existing pneumatic fingers, and solves the problem of handling larger materials and assembling larger workpieces when using pneumatic fingers.

[0026] The piston rod includes a rod body 2 and a piston 30 disposed at the rear end of the rod body 2. An air chamber 14 is defined within the piston cylinder 10, and the piston 30 is disposed within the air chamber 14. The piston rod also includes a compression spring assembly, which is disposed within the air chamber 14 in front of the piston 30, or within the air chamber 14 in rear of the piston 30. When the compression spring assembly is disposed within the air chamber 14 in front of the piston 30, the front end of the compression spring assembly rests against the piston cylinder 10, and the rear end of the compression spring assembly rests against the piston 30. At this point, the elastic potential energy stored in the compression spring assembly applies a backward push to the piston rod, thereby maintaining the grip of the pneumatic finger when the air is cut off. The compression spring assembly provides the gripping force. Conversely, when the compression spring assembly is positioned within the air chamber 14 behind the piston 30, the rear end of the compression spring assembly rests against the piston cylinder 10, while the front end of the compression spring assembly rests against the piston 30. The stored elastic potential energy of the compression spring assembly then applies a force to push the piston rod forward. This maintains the open position of the pneumatic finger when the air is shut off, with the compression spring assembly providing the opening force. It is understood that the desired type of compression spring assembly can be selected in practice to determine the specific location of the compression spring assembly.

[0027] Specifically, the wedge-shaped structure includes an I-shaped groove 201 provided on the inclined wedge block 20 and a T-shaped groove 211 provided on the left finger block 21 and the right finger block 22. The left finger block 21 and the right finger block 22 are connected to the inclined wedge block 20 through the T-shaped groove 211 and the I-shaped groove 201.

[0028] The compression spring group includes a first compression spring 3, a second compression spring 4, a third compression spring 5, a fourth compression spring 6 and a fifth compression spring 7. The diameters of the first compression spring 3, the second compression spring 4, the third compression spring 5, the fourth compression spring 6 and the fifth compression spring 7 increase sequentially and are arranged on each other. The piston and the piston cylinder 10 are respectively provided with corresponding first spring limiting grooves 31, second spring limiting grooves 32, third spring limiting grooves 33, fourth spring limiting grooves 34 and fifth spring limiting grooves 35. The ends of the first compression spring 3, the second compression spring 4, the third compression spring 5, the fourth compression spring 6 and the fifth compression spring 7 are respectively arranged in the corresponding first spring limiting grooves 31, the second spring limiting grooves 32, the third spring limiting grooves 33, the fourth spring limiting grooves 34 and the fifth spring limiting grooves 35.

[0029] In one specific embodiment, the piston 30 is configured as an ellipse. It is understood that when the ellipse piston 30 is configured, the air cavity 14 is also configured as an ellipse to match it. The use of the ellipse piston 30 can increase the pressure-bearing surface and thus increase the clamping force.

[0030] The left and right finger blocks 21 and 22 are provided with oil holes 40, one end of which is connected to an oil cup 41, and the other end of which is connected to the T-shaped chute 211. In other words, both fingers are provided with oil cups 41, which periodically fill the wedge-shaped structure where the fingers meet the wedge block 20 with lubricant, ensuring smooth lubrication.

[0031] The piston 30 is equipped with a magnet (not shown), and the piston cylinder 10 at the rear end of the air chamber 14 is equipped with a magnetic switch (not shown). As the piston 30 moves within the air chamber 14, the magnet (not shown) moves closer to or further away from the magnetic switch (not shown), causing the magnetic switch (not shown) to open or close. The magnet on the piston 30 moves back and forth with the piston. When the magnetic switch installed at the rear approaches the magnetic switch with the movement of the magnet, the magnetic switch generates a signal, accurately determining the working status and working position of the finger. Based on this, the working position of the actuator can be monitored in real time, achieving precise and real-time control and monitoring of the working production status.

[0032] The piston cylinder 10 includes a front cylinder body 11 and a rear cylinder body 12 . The front cylinder body 11 and the rear cylinder body 12 are relatively closed to form the piston cylinder 10 . Part of the air cavity 14 is provided on the front cylinder body 11 , and the remaining part is provided on the rear cylinder body 12 .

[0033] To sum up, the pneumatic finger of the present invention is designed with a 90° angle between the movement direction of the piston rod and the finger block, and transmits motion and torque through a wedge-shaped structure, thereby sacrificing the clamping stroke to increase the clamping force. Therefore, it can withstand greater torque than existing pneumatic fingers, realizing the problem of handling larger materials and assembling larger workpieces when using pneumatic fingers.

[0034] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0035] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A heavy-duty pneumatic finger capable of achieving ultra-long arm clamping, comprising a piston cylinder and a piston rod, wherein the piston rod is telescopically arranged in the piston cylinder and extends out of the front end of the piston cylinder, characterized in that: An inverted T-slot is provided at the front end of the piston cylinder, and an oblique wedge is provided at the outer end of the piston rod, and the oblique wedge is located in the middle of the inverted T-slot. A left finger block and a right finger block are provided in the grooves on both sides of the inverted T-slot, and the left finger block and the right finger block are slidably adapted to be connected with the inverted T-slot, and the left finger block and the right finger block cooperate with the wedge-shaped structure of the oblique wedge at the ends corresponding to the oblique wedge, so that the piston rod can drive the left finger block and the right finger block to slide in the inverted T-slot.

2. A heavy-duty pneumatic finger capable of achieving ultra-long arm clamping according to claim 1, characterized in that: The piston rod includes a rod body and a piston arranged at the rear end of the rod body. An air cavity is provided in the piston cylinder, and the piston is arranged in the air cavity. It also includes a compression spring group, which is arranged in the air cavity on the front side of the piston, or the compression spring group is arranged in the air cavity on the rear side of the piston.

3. A heavy-duty pneumatic finger capable of achieving ultra-long arm clamping according to claim 1 or 2, characterized in that: The wedge-shaped structure includes an I-shaped slide groove provided on the inclined wedge block and a T-shaped slide groove provided on the left finger block and the right finger block. The left finger block and the right finger block are connected to the inclined wedge block through the T-shaped slide groove and the I-shaped slide groove.

4. The heavy-duty pneumatic finger capable of achieving ultra-long arm clamping according to claim 2, characterized in that: The compression spring group includes a first compression spring, a second compression spring, a third compression spring, a fourth compression spring and a fifth compression spring. The diameters of the first compression spring, the second compression spring, the third compression spring, the fourth compression spring and the fifth compression spring increase successively and are arranged on each other. The piston and the piston cylinder are respectively provided with corresponding first spring limiting grooves, second spring limiting grooves, third spring limiting grooves, fourth spring limiting grooves and fifth spring limiting grooves. The ends of the first compression spring, the second compression spring, the third compression spring, the fourth compression spring and the fifth compression spring are respectively arranged in the corresponding first spring limiting grooves, second spring limiting grooves, third spring limiting grooves, fourth spring limiting grooves and fifth spring limiting grooves.

5. The heavy-duty pneumatic finger capable of achieving ultra-long arm clamping according to claim 2, characterized in that: The piston is configured to be elliptical.

6. The heavy-duty pneumatic finger capable of achieving ultra-long arm clamping according to claim 3, characterized in that: The left finger block and the right finger block are provided with an oil hole, one end of the oil hole is connected to an oil cup, and the other end of the oil hole is connected to the T-shaped slide groove.

7. The heavy-duty pneumatic finger capable of achieving ultra-long arm clamping according to claim 2, characterized in that: A magnet is provided on the piston, and a magnetic switch is provided on the piston cylinder at the rear end of the air cavity. When the piston moves in the air cavity, the magnet approaches or moves away from the magnetic switch, causing the magnetic switch to open or close.

8. The heavy-duty pneumatic finger capable of achieving ultra-long arm clamping according to claim 2, characterized in that: The piston cylinder includes a front cylinder body and a rear cylinder body. The front cylinder body and the rear cylinder body are relatively closed to form the piston cylinder. The air cavity part is arranged on the front cylinder body, and the remaining part is arranged on the rear cylinder body.

Images