CN111120454A

CN111120454A - Low-friction locking cylinder

Info

Publication number: CN111120454A
Application number: CN202010050694.5A
Authority: CN
Inventors: 张天恩
Original assignee: Enpzis Intelligent Equipment Suzhou Co ltd
Current assignee: Enpzis Intelligent Equipment Suzhou Co ltd
Priority date: 2020-01-17
Filing date: 2020-01-17
Publication date: 2020-05-08

Abstract

The invention discloses a low-friction locking cylinder which comprises a cylinder body, a piston rod positioned in the cylinder body and a locking piece sleeved on the piston rod, wherein the piston rod is connected with the cylinder body through a connecting rod; be provided with the air pipe head on the cylinder body, the piston rod is located one end in the cylinder body is spherical structure, the retaining member is located in the cylinder body, the retaining member is including the direction bearing, retaining member and the unblock piston that set gradually, the piston rod runs through the direction bearing, the direction bearing pass through the spring with the retaining member is connected, the retaining member with the cooperation of unblock piston, direction bearing, unblock piston all with the laminating of cylinder body inner wall. According to the invention, the friction force is reduced without using an O-shaped ring, the piston rod can be filled between the piston of the cylinder and the inner wall of the cylinder body in the motion process, so that the piston rod is not in direct contact with the inner wall of the cylinder body, and the friction force borne by the piston rod in the motion process can also be reduced.

Description

Low-friction locking cylinder

Technical Field

The invention belongs to the technical field of locking cylinders, and particularly relates to a low-friction locking cylinder.

Background

With the continuous development of automation technology and the continuous rising of labor cost, mechanical equipment is inevitably developed towards high speed, high efficiency and full automation. The realization of automation, can not leave executing element such as electronic, pneumatics, the cylinder is the most common pneumatic actuator.

The piston rod of traditional locking cylinder is easy to produce a small amount of friction with the locking cylinder inner wall in the locking cylinder reciprocating motion process, and the friction is reduced for using O type circle to traditional mode that reduces friction, and it is relatively poor to adopt this kind of mode to reduce frictional force's effect, and O type circle damages easily simultaneously, and the life of O type circle will directly influence the life of locking cylinder.

Disclosure of Invention

The invention overcomes the defects of the prior art and provides a low-friction locking cylinder to solve the problems in the prior art.

In order to achieve the purpose, the invention adopts the technical scheme that: a low-friction locking cylinder comprises a cylinder body, a piston rod positioned in the cylinder body and a locking piece sleeved on the piston rod; be provided with the air pipe head on the cylinder body, the piston rod is located one end in the cylinder body is spherical structure, the retaining member is located in the cylinder body, the retaining member is including the direction bearing, retaining member and the unblock piston that set gradually, the piston rod runs through the direction bearing, the direction bearing pass through the spring with the retaining member is connected, the retaining member with the cooperation of unblock piston, direction bearing, unblock piston all with the laminating of cylinder body inner wall.

In a preferred embodiment of the present invention, the cylinder body is provided with an exhaust port corresponding to the position of the locking member.

In a preferred embodiment of the present invention, a cylinder piston is disposed in the cylinder body, and a cylinder piston is disposed in the cylinder body and is matched with the spherical structure of the piston rod.

In a preferred embodiment of the present invention, a clearance between the piston of the cylinder and the inner wall of the cylinder body is 0 to 0.005 mm.

In a preferred embodiment of the present invention, one end of the spring is fixed to the guide bearing.

In a preferred embodiment of the invention, the locking member comprises a brake tile, a spherical steel ball and a conical steel sleeve which are attached to the piston rod from inside to outside.

In a preferred embodiment of the invention, the conical steel sleeve is connected with the guide bearing through a spring.

In a preferred embodiment of the present invention, the number of the air pipe joints is three, one air pipe joint corresponds to the spherical structure position of the piston rod, the other air pipe joint corresponds to the guide bearing position, and the other air pipe joint corresponds to the unlocking piston position.

The invention solves the defects in the background technology, and has the following beneficial effects:

the invention forms a low-friction locking cylinder under the matching action of the cylinder body, the piston rod and the locking piece, the friction force is not required to be reduced by using an O-shaped ring, gas can be filled between the piston of the cylinder and the inner wall of the cylinder body due to air pressure in the moving process of the piston rod, so that the friction force borne by the piston rod in the moving process can be reduced without directly contacting the piston rod with the inner wall of the cylinder body, and meanwhile, the cylinder can be in a locking state due to the existence of the locking piece and is convenient to use.

Drawings

The invention is further explained below with reference to the figures and examples;

FIG. 1 is a schematic overall structure of a preferred embodiment of the present invention;

FIG. 2 is a cross-sectional view of a preferred embodiment of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2;

in the figure: 1. a cylinder body; 2. a piston rod; 3. a gas pipe joint; 4. a spherical structure; 5. a guide bearing; 6. a locking member; 61. a brake tile; 62. a spherical steel ball; 63. a conical steel sleeve; 7. unlocking the piston; 8. a spring; 9. an exhaust port; 10. a cylinder piston.

Detailed Description

The invention will now be described in further detail with reference to the accompanying drawings and examples, which are simplified schematic drawings and illustrate only the basic structure of the invention in a schematic manner, and thus show only the constituents relevant to the invention.

As shown in fig. 1 to 3, a low-friction locking cylinder comprises a cylinder body 1, a piston rod 2 located in the cylinder body 1, and a locking member 6 sleeved on the piston rod 2; be provided with the air pipe connector 3 on cylinder body 1, the one end that piston rod 2 is located cylinder body 1 is spherical structure 4, retaining member 6 is located cylinder body 1, retaining member 6 is including the direction bearing 5 that sets gradually, retaining member 6 and unblock piston 7, piston rod 2 runs through direction bearing 5, direction bearing 5 passes through spring 8 and is connected with retaining member 6, retaining member 6 and the cooperation of unblock piston 7, direction bearing 5, unblock piston 7 all laminate with 1 inner wall of cylinder body.

In this embodiment, the spherical structure 4 of the piston rod 2 is matched with the cylinder piston 10, so that the position of the piston rod 2 can be automatically adjusted in the movement process, the piston rod 2 is always concentric with the cylinder body 1, meanwhile, the cylinder piston 10 can drive the piston rod 2 to move under the action of air pressure, and the gap between the outer ring of the cylinder piston 10 and the inner wall of the cylinder body 1 is 0-0.005 mm, so that the air filled in the cylinder body 1 can be filled between the cylinder piston 10 and the inner wall of the cylinder body 1, and the movement of the piston rod 2 is not influenced.

In this embodiment, the spring 8 in the initial state is compressed and has a certain tension, when the piston rod 2 continuously extends, the conical steel bushing 63 of the locking member 6 moves under the tension of the spring 8, because the conical surface inside the conical steel bushing 63 contacts with the spherical steel ball 62, the spherical steel ball 62 is forced to extrude the brake tile 61, the brake tile 61 contacts with the piston rod 2 in the stressed state, the piston rod 2 is locked by friction force, the locking state of the cylinder is realized, when the locking state of the cylinder needs to be released, the air pipe joint 3 corresponding to the position of the unlocking piston 7 is ventilated, the air pressure pushes the unlocking piston 7 to compress the spring 8, the conical steel bushing 63 is driven to move, the locking member 6 is completely reset, and the locking state is released.

Specifically, the cylinder body 1 is provided with an exhaust port 9, the exhaust port 9 corresponds to the locking member 6, and the air pressure introduced into the cylinder body 1 can be exhausted from the exhaust port 9 in the resetting process.

In the present embodiment, a cylinder piston 10 is disposed in the cylinder body 1, the cylinder piston 10 is matched with the spherical structure 4 of the piston rod 2, and the presence of the cylinder piston 10 can enable the piston rod 2 to keep concentric with the cylinder body 1 during the movement process.

Specifically, the clearance between the cylinder piston 10 and the inner wall of the cylinder body 1 is 0-0.005 mm.

In this embodiment, one end of the spring 8 is fixed to the guide bearing 5, thereby ensuring that the spring 8 has tension in the initial state.

Specifically, the locking member 6 comprises a brake tile 61, a spherical steel ball 62 and a conical steel sleeve 63 which are attached to the piston rod 2 from inside to outside.

Specifically, the tapered steel bushing 63 is connected to the guide bearing 5 by the spring 8.

In the present embodiment, the number of the air pipe joints 3 is three, one air pipe joint 3 corresponds to the position of the spherical structure 4 of the piston rod 2, another air pipe joint 3 corresponds to the position of the guide bearing 5, and another air pipe joint 3 corresponds to the position of the unlocking piston 7.

In summary, under the cooperation of the cylinder body 1, the piston rod 2 and the locking member 6, the low-friction locking cylinder is formed, the friction force is reduced without using an O-shaped ring, gas can be filled between the cylinder piston 10 and the inner wall of the cylinder body 1 due to air pressure in the moving process of the piston rod 2, so that the friction force borne by the piston rod 2 in the moving process can be reduced without directly contacting the inner wall of the cylinder body 1 by the piston rod 2, and meanwhile, the existence of the locking member 6 can enable the cylinder to be in a locking state and is convenient to use.

In light of the foregoing description of the preferred embodiment of the present invention, it is to be understood that various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A low-friction locking cylinder is characterized by comprising a cylinder body, a piston rod positioned in the cylinder body and a locking piece sleeved on the piston rod; be provided with the air pipe head on the cylinder body, the piston rod is located one end in the cylinder body is spherical structure, the retaining member is located in the cylinder body, the retaining member is including the direction bearing, retaining member and the unblock piston that set gradually, the piston rod runs through the direction bearing, the direction bearing pass through the spring with the retaining member is connected, the retaining member with the cooperation of unblock piston, direction bearing, unblock piston all with the laminating of cylinder body inner wall.

2. The low friction locking cylinder of claim 1 wherein the cylinder body has an exhaust port corresponding in position to the locking member.

3. A low friction locking cylinder according to claim 1, wherein a cylinder piston is provided in the cylinder body, said cylinder piston cooperating with the spherical structure of the piston rod.

4. A low friction locking cylinder according to claim 3 wherein the clearance between the cylinder piston and the inner wall of the cylinder body is 0 to 0.005 mm.

5. A low friction locking cylinder as defined in claim 1 wherein said spring is fixed at one end to said guide bearing.

6. The low-friction locking cylinder according to claim 1, wherein the locking member comprises a brake tile, a spherical steel ball and a conical steel sleeve which are attached to the piston rod from inside to outside.

7. A low friction lock cylinder according to claim 6 in which the tapered steel sleeve is connected to the guide bearing by a spring.

8. The low friction locking cylinder of claim 1, wherein said number of air tube connectors is three, one said air tube connector corresponding to a position of said spherical structure of said piston rod, another said air tube connector corresponding to a position of said guide bearing, and another said air tube connector corresponding to a position of said unlocking piston.