CN210660828U

CN210660828U - Locking cylinder with dustproof function

Info

Publication number: CN210660828U
Application number: CN201921716828.1U
Authority: CN
Inventors: 赵万远
Original assignee: Shenzhen Jiarui Industrial Automation Co Ltd
Current assignee: Shenzhen Jiarui Industrial Automation Co Ltd
Priority date: 2019-10-14
Filing date: 2019-10-14
Publication date: 2020-06-02
Anticipated expiration: 2029-10-14

Abstract

The utility model discloses a locking cylinder with dustproof function, which is formed by enclosing a cylinder body, a front cover and a rear cover, wherein a piston rod and a locking component are arranged in the cylinder body, an air inlet hole and an air outlet hole are arranged on the cylinder body, and one end of the piston rod extends out of the front cover and is arranged with the front cover in a sliding way; an annular groove is formed in the front cover, and a dust sealing block which is arranged in the annular groove in a sealing manner with the piston rod is arranged in the annular groove, wherein: the dust sealing block is obliquely provided with a first contact part and a second contact part along the direction of the rod wall of the piston rod, so that a dust-proof cavity is formed between the piston rod and the first contact part and between the piston rod and the second contact part; the dust sealing block is obliquely provided with a third contact part along the direction of the inner wall of the front cover, so that a sealing cavity is formed between the inner wall of the front cover and the second contact part and between the inner wall of the front cover and the third contact part, and the problem that dust influences the sealing part in the prior art is solved through the dust-proof cavity and the sealing cavity.

Description

Locking cylinder with dustproof function

Technical Field

The utility model belongs to the technical field of pneumatic element, specifically relate to a locking cylinder with dustproof function.

Background

In the practical application of the air cylinder, the piston rod is often required to be locked when the piston rod is at the stroke end so as not to move, and then other operations are carried out; after the operation is finished, the piston rod needs to be unlocked, so that the air cylinder needs to have the locking and unlocking functions.

When the dust adheres to the wall of the piston rod outside the cylinder body, the dust is easily brought into the cylinder body, the O-shaped sealing ring or the Y-shaped sealing ring is arranged between the piston rod and the end cover at present, the dust prevention and sealing effects of the O-shaped sealing ring are good, the O-shaped sealing ring is easy to wear and tear when being used in a dust-rich environment for a long time, the frequency of replacement is high, the Y-shaped sealing ring can be sealed only by the arrangement mode of the Y-shaped sealing ring being parallel to the movement direction of the piston rod, but the dust prevention effect is poor, and therefore a locking cylinder with the dust prevention function is needed to be provided, and the.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a locking cylinder that wear-resisting, leakproofness are good, just have certain dustproof function to above problem.

The utility model discloses a locking cylinder with dustproof function, which is formed by enclosing a cylinder body, a front cover and a rear cover, wherein a piston rod and a locking assembly are arranged in the cylinder body, one end of the piston rod extends out of the front cover and is arranged with the front cover in a sliding way, a ring groove is arranged on the front cover, and a dust sealing block which is arranged with the piston rod in a sealing way is arranged in the ring groove; wherein:

the dust seal block is obliquely provided with a first contact part and a second contact part along the direction of the rod wall of the piston rod, so that a dust-proof cavity is formed between the piston rod and the first contact part and between the piston rod and the second contact part;

the dust sealing block is obliquely provided with a third contact part along the direction of the inner wall of the front cover, so that a sealing cavity is formed between the inner wall of the front cover and the second contact part and between the inner wall of the front cover and the third contact part.

Further, the locking assembly includes: the rear lock rod is connected with the piston rod, and a locking groove is formed in the rear lock rod; and the lock seat is fixed on the opening of the cylinder body and is arranged in a sealing manner with the cylinder body, a lock pin is arranged in a cavity of the lock seat, the lock pin extends into the opening and is arranged in a sealing manner with the opening, a spring is arranged between the lock pin and the lock seat, and the spring can push the lock pin to enable the bottom of the lock pin to penetrate out of the opening and be clamped into the locking groove.

Furthermore, the end part of the rear lock rod forming the locking groove is of a conical structure, so that the lock pin can enter the locking groove along a conical surface to lock the piston rod.

Furthermore, a movable screw is fixed at the upper end of the lock pin and penetrates out of the lock seat.

Further, a piston is arranged on the piston rod, and a wear-resistant belt is arranged on the piston.

Further, a front shock pad is arranged at the end part of the piston.

Furthermore, a rear shock pad is arranged on the end face of the inner side of the rear cover.

Furthermore, the piston rod device further comprises a flange plate fixedly connected with the end part of the piston rod, a plurality of through holes are penetrated through the cylinder body, guide rods are movably arranged on the through holes, and the guide rods are connected with the flange plate.

Compared with the prior art, the utility model, beneficial effect does:

1. when the dust sealing block is used in a dust environment, the abrasion part caused by dust is positioned on the first contact part, and the part for realizing sealing is positioned on the second contact part and the third contact part, so that the influence of the dust on the sealing performance can be avoided through the structural design;

2. the cylinder is additionally provided with the locking device, so that the safety coefficient is high, the cylinder can be kept in a locking state under the condition of no ventilation, and the cylinder is prevented from freely falling off under a load state;

other advantages of the present invention will be further explained in the detailed description of the invention.

Drawings

Fig. 1 is the utility model discloses the spatial structure sketch map of locking cylinder.

Fig. 2 is a partial structural sectional view of fig. 1.

Fig. 3 is a partially enlarged structural diagram of a portion a in fig. 2.

Fig. 4 is a partially enlarged structural view for achieving the dustproof and sealing effect.

The text labels in the figures are represented as: 10. a cylinder body; 101. a through hole; 102. an air inlet; 103. an air outlet; 20. a front cover; 30. a rear cover; 31. a rear cushion pad; 40. a piston rod; 41. a piston; 42. a wear-resistant band; 43. a front cushion pad; 50. a locking assembly; 51. a lock seat; 52. a lock pin; 53. a spring; 54. a movable screw; 510. a spring seat; 511. a mounting seat; 60. a dust seal block; 61. a first contact portion; 62. a second contact portion; 63. a third contact portion; 601. a dust-proof cavity; 602. sealing the cavity; 70. a rear lock lever; 701. a locking groove; 80. a flange plate; 90. a guide rod.

Detailed Description

In order to make the technical solution of the present invention better understood, the present invention is described in detail below with reference to the accompanying drawings, and the description of the present invention is only exemplary and explanatory, and should not be construed as limiting the scope of the present invention.

Referring to fig. 4, the present invention provides an embodiment of a locking cylinder with a dustproof function, which is formed by enclosing a cylinder body 10, a front cover 20, and a rear cover 30, wherein a piston rod 40 and a locking assembly 50 are disposed in the cylinder body 10, an air inlet 102 and an air outlet 103 are disposed on the cylinder body 10, and one end of the piston rod 40 extends out of the front cover 20 and is slidably disposed with the front cover 20; an annular groove is formed in the front cover 20, a dust sealing block 60 which is arranged in a sealing mode with the piston rod 40 is arranged in the annular groove, and the problem that dust influences the sealing position in the prior art is solved through the dust sealing block 60.

The specific solution is that the dust seal block 60 is obliquely provided with a first contact part 61 and a second contact part 62 along the rod wall direction of the piston rod 40, so that a dust-proof cavity 601 is formed between the piston rod 40 and the first contact part 61 and the second contact part 62, and when the piston rod 40 moves, the first contact part 61 removes dust on the piston rod 40, thereby preventing the dust from entering the cylinder 10; the sealing effect is realized by arranging the third contact part 63 on the dust sealing block 60 along the inner wall direction of the front cover 20 in an inclined manner, so that a sealing cavity 602 is formed between the inner wall of the front cover 20 and the second contact part 62 as well as between the inner wall of the front cover 20 and the third contact part 63, a Y-shaped sealing structure is formed to improve the sealing effect, the dust is prevented from entering the dust sealing block, the sealing part is not abraded when the dust is swept away, and the service life of the dust sealing block 60 is prolonged.

In this embodiment, as shown in fig. 1 to 3, the cylinder has a lock function, wherein the lock assembly 50 includes: the rear lock rod 70 is connected with the piston rod 40, and a locking groove 701 is formed in the rear lock rod 70; the lock seat 51 is fixed on the opening of the cylinder body 10 and is arranged in a sealing way with the cylinder body 10, the lock seat 51 consists of a mounting seat 511 fixed on the cylinder body 10 and a spring seat 510 fixed with the mounting seat 511 through a bolt, a cavity for mounting a lock pin 52 is formed between the mounting seat 511 and the spring seat 510, the lock pin 52 extends into the opening of the cylinder body 10 and is arranged in a sealing way with the cylinder body 10, a spring 53 is arranged between the lock pin 52 and the spring seat 510, and the spring 53 can push the lock pin 52 to enable the bottom of the lock pin 52 to penetrate through the opening and be clamped into the locking groove 701;

the specific unlocking process is as follows: gas enters from the gas inlet hole 102, the lock pin 52 is clamped into the locking groove 701, under the action of increasing pressure, the air pressure pushes the lock pin 52 to compress the spring 53 until the lock pin 52 is separated from the locking groove 701, and the air pressure pushes the piston rod 40 to extend out, so that the unlocking state is completed;

the specific locking process is as follows: the gas enters from the gas outlet hole 103, pushes the piston rod 40 to retreat into the cylinder body 10, and in order to enable the lock pin 52 to be smoothly clamped into the locking groove 701, the end part of the rear lock rod 70 forming the locking groove 701 is set to be in a tapered structure, so that when the piston rod 40 retreats, the lock pin 52 can enter the locking groove 701 along the tapered surface of the lock pin, and the locking state is completed.

Preferably, the elastic force of the spring 53 can be adjusted by fixing the movable screw 54 at the upper end of the lock pin 52 and making the movable screw 54 penetrate through the spring seat 510, so as to avoid the problem of dead locking of the piston rod; to improve the wear resistance of the piston 41, a wear strip 42 is provided on the piston 41.

As can also be seen with the aid of fig. 3, the end of the piston 41 is provided with a front damping pad 43; the rear shock pad 31 is disposed on the inner side end surface of the rear cover 30, so as to prevent the piston rod 40 from rigidly contacting the front cover 20 and the rear cover 30, which may damage the cylinder.

Furthermore, the utility model provides another embodiment, the difference with above-mentioned embodiment lies in that this embodiment still includes the flange board 80 of fixed connection piston rod 40 tip, it has a plurality of through-holes 101 to link up on the cylinder body 10, the activity is provided with guide arm 90 on the through-hole 101, guide arm 90 connects flange board 80 limits piston rod 40 through guide arm 90 for the piston rod 40 of this cylinder can not take place to rotate in the course of the work.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The principles and embodiments of the present invention have been explained herein using specific examples, which are presented only to assist in understanding the methods and their core concepts. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes can be made without departing from the principle of the present invention, and the above technical features can be combined in a proper manner; the application of these modifications, variations or combinations, or the application of the concepts and solutions of the present invention in other contexts without modification, is not intended to be considered as a limitation of the present invention.

Claims

1. A locking cylinder with a dustproof function is formed by enclosing a cylinder body, a front cover and a rear cover, wherein a piston rod and a locking assembly are arranged in the cylinder body, one end of the piston rod extends out of the front cover and is arranged with the front cover in a sliding mode, and the locking cylinder is characterized in that an annular groove is formed in the front cover, and a dust sealing block which is arranged with the piston rod in a sealing mode is arranged in the annular groove; wherein:

2. The lock cylinder with dust-proof function as claimed in claim 1, wherein the lock assembly comprises:

the rear lock rod is connected with the piston rod, and a locking groove is formed in the rear lock rod; and

the lock seat is fixed on the opening of the cylinder body and is arranged in a sealing mode with the cylinder body, a lock pin is arranged in a cavity of the lock seat, the lock pin extends into the opening and is arranged in a sealing mode with the opening, a spring is arranged between the lock pin and the lock seat, the spring can push the lock pin, and the bottom of the lock pin penetrates through the opening and is clamped into the locking groove.

3. A locking cylinder with dustproof function as claimed in claim 2, wherein the end of the rear lock rod forming the locking groove is tapered so that the lock pin can enter the locking groove along a tapered surface to lock the piston rod.

4. The locking cylinder with the dustproof function as claimed in claim 3, wherein a movable screw is fixed at the upper end of the lock pin, and the movable screw penetrates out of the lock seat.

5. The lock-up cylinder with the dustproof function as set forth in claim 1, wherein a piston is provided on said piston rod, and a wear-resistant band is provided on said piston.

6. The lock cylinder with a dustproof function according to claim 5, wherein a front cushion pad is provided at an end of the piston.

7. The lock cylinder with a dustproof function as set forth in claim 6, wherein a rear cushion is provided on an inner side end surface of the rear cover.

8. The air cylinder as claimed in claim 1, further comprising a flange plate fixedly connected to an end of the piston rod, wherein a plurality of through holes are formed through the cylinder body, and guide rods are movably disposed on the through holes and connected to the flange plate.