CN211951291U

CN211951291U - Pneumatic rod with excellent opening and closing performance

Info

Publication number: CN211951291U
Application number: CN201922296130.5U
Authority: CN
Inventors: 陶声华; 陶声荣
Original assignee: Changzhou Lant Gas Spring Co ltd
Current assignee: Changzhou Lant Gas Spring Co ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-11-17
Anticipated expiration: 2029-12-19

Abstract

The utility model belongs to the technical field of the pneumatic rod technique and specifically relates to a pneumatic rod of good performance of opening and close and comprises an outer cylinder body, sliding connection inner cylinder body in the outer cylinder body, sliding connection piston in the inner cylinder body, the switch bolt passes through inner support, sealed lid and is connected with inner cylinder body, the inner support is fixed in the inner wall of inner cylinder body, sealed lid is sealed with the tip of inner cylinder body, inner cylinder body is provided with the air flue together with epicoele and cavity of resorption, the lateral wall of sealed lid is provided with the air vent, the air vent endotheca has the breather pipe, the both ends of breather pipe link up with the mesopore of air flue and inner support respectively, realize the intercommunication of inner support and air flue through the breather pipe, its gas tightness is good, after the switch bolt return, sealing washer two and annular groove cooperation guarantee the contact seal reliability, effectively realize; through setting up the direction bush, effectively increase the direction location distance of guide arm, make the switch bolt be linear motion to guarantee the performance of opening and close of switch bolt.

Description

Pneumatic rod with excellent opening and closing performance

Technical Field

The utility model belongs to the technical field of the pneumatic rod technique and specifically relates to an open and close excellent performance pneumatic rod.

Background

The pneumatic rod is an industrial accessory which can play a role in supporting, buffering, braking, height adjustment, angle adjustment and the like, and generally comprises a pressure cylinder, a piston rod, a piston, a sealing element, a guide sleeve and a filler. The principle is that inert gas or oil-gas mixture is filled in a closed pressure cylinder, the pressure in a cavity is several times to dozens of times higher than the atmospheric pressure, and the motion of a piston rod is realized by utilizing the pressure difference generated by the cross section area of the piston rod smaller than that of the piston. When the pneumatic rod is opened and closed, the switch bolt of the pneumatic rod needs to be opened and closed, the circulation and the cut-off of gas at the upper end and the lower end of the piston rod are realized, but the existing pneumatic rod switch bolt is easy to have the situations of poor gas closing performance and unsmooth opening.

SUMMERY OF THE UTILITY MODEL

Aiming at overcoming the defects, the utility model provides an open and close excellent performance pneumatic pole.

The utility model provides a technical scheme that its technical problem adopted is: a pneumatic rod with excellent opening and closing performance comprises an outer cylinder body, an inner cylinder body is connected in the outer cylinder body in a sliding mode, a piston is connected in the inner cylinder body in a sliding mode, the rod portion of the piston is connected with the bottom wall of the outer cylinder body in a rotating mode, the end portion of the inner cylinder body is connected with a switch bolt, the switch bolt comprises a bolt body and a guide rod, the switch bolt is connected with the inner cylinder body through an inner support and a sealing cover, the inner support is fixed to the inner wall of the inner cylinder body, the end portion of the inner cylinder body is sealed through the sealing cover, the bolt body of the switch bolt is in contact sealing with the bottom surface of the inner support, the guide rod penetrates through a middle hole of the inner support and the sealing cover and extends out of the middle hole, the diameter of the middle hole is larger than that of the guide rod, a first sealing ring is arranged on the outer wall of the, the side wall of the sealing cover is provided with a vent hole, a vent pipe is sleeved in the vent hole, and two ends of the vent pipe are respectively communicated with the air passage and the middle hole of the inner support.

According to the utility model discloses a further embodiment, further include, be provided with the guide bush between inner support and the sealed lid, the mesopore of guide bush forms sliding connection with the guide arm cooperation. Through setting up the direction bush, effectively increase the direction location distance of guide arm, make the switch bolt be linear motion to guarantee the performance of opening and close of switch bolt.

According to the utility model discloses a further embodiment, further include, the inner support bottom surface still is provided with cyclic annular flange, cyclic annular flange and key body outer wall adaptation. When the switch bolt resets, the annular flange is matched with the outer wall of the bolt body, and the sealing performance of the pneumatic rod is further ensured.

According to another embodiment of the present invention, further comprising, the first sealing ring is an O-ring. The sealing performance of the inner support is ensured.

According to another embodiment of the present invention, further comprising, the number of the first seal rings is at least three. Further improving the sealing performance of the inner support.

According to another embodiment of the present invention, further comprising, the guide rod end is provided with a limit step.

The utility model has the advantages that the communication between the inner support and the air passage is realized through the vent pipe, the air tightness is good, after the switch bolt returns, the second sealing ring is matched with the annular groove, the contact sealing reliability is ensured, and the gas in the upper cavity and the lower cavity is effectively cut off; through setting up the direction bush, effectively increase the direction location distance of guide arm, make the switch bolt be linear motion to guarantee the performance of opening and close of switch bolt.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1;

fig. 3 is a flow chart of the air flow when the switch cock is opened.

In the figure, 1, an outer cylinder body, 2, an inner cylinder body, 2-1, an air passage, 3, a piston, 3-1, a rod part, 4, a switch bolt, 4-1, a bolt body, 4-2, a guide rod, 4-3, a limiting step, 5, an inner support, 5-1, a middle hole, 5-2, an annular groove, 5-3, an annular flange, 6, a sealing cover, 6-1, a vent hole, 7, a first sealing ring, 8, a vent pipe, 9, a second sealing ring, 10 and a guide bushing are arranged.

Detailed Description

As shown in fig. 1 to 2, the utility model is a schematic structural diagram, a pneumatic rod with excellent opening and closing performance, comprising an outer cylinder body 1, an inner cylinder body 2 is slidably connected in the outer cylinder body 1, a piston 3 is slidably connected in the inner cylinder body 2, a rod part 3-1 of the piston 3 is rotatably connected with the bottom wall of the outer cylinder body 1, the end of the inner cylinder body 2 is connected with a switch bolt 4, the switch bolt 4 comprises a bolt body 4-1 and a guide rod 4-2, the switch bolt 4 is connected with the inner cylinder body 2 through an inner bracket 5 and a sealing cover 6, the inner bracket 5 is fixed on the inner wall of the inner cylinder body 2, the sealing cover 6 seals the end of the inner cylinder body 2, wherein the bolt body 4-1 of the switch bolt 4 is in contact sealing with the bottom surface of the inner bracket 5, the guide rod 4-2 passes through a middle hole 5-1 of the inner bracket 5 and the sealing cover 6 and extends out, the, the outer wall of the inner support 5 is provided with a first sealing ring 7, the bolt body 4-1 is fixedly bonded with a second sealing ring 9, the bottom surface of the inner support 5 is provided with an annular groove 5-2 corresponding to the second sealing ring 9, the inner cylinder body 2 is provided with an air passage 2-1 together with an upper cavity and a lower cavity, the side wall of the sealing cover 6 is provided with an air vent 6-1, the air vent 6-1 is sleeved with an air pipe 8, and two ends of the air pipe 8 are respectively communicated with the air passage 2-1 and a middle hole of the inner support 5.

In the application, the end of the guide rod 4-2 is connected with the adjusting rod, the adjusting rod controls the switch bolt 4 to move downwards, when the switch bolt 4 moves downwards, the bolt body 4-1 is separated from the inner support 5, the middle hole 5-1 is opened, as shown in figure 3, at this time, the compressed gas in the lower cavity of the inner cylinder body 2 enters the upper cavity from the air passage 2-1, the vent pipe 8 and the middle hole 5-1, the air pressures of the upper cavity and the lower cavity are equal, and the acting force of the upper end of the piston 3 is larger than that of the lower end because the area of the upper surface of the piston 3 is larger than that of the lower surface, so that the inner cylinder body 2. The air-tight sealing device has the advantages that the communication between the inner support 5 and the air passage 2-1 is realized through the vent pipe 8, the air flow loss is reduced, the air tightness is good, when the switch bolt 4 returns, the second sealing ring 9 is matched with the annular groove 5-2, the contact sealing reliability is guaranteed, the cut-off of the gas in the upper cavity and the gas in the lower cavity is effectively realized, and the stability of the pneumatic rod is guaranteed.

According to another embodiment of the present invention, it further comprises a guiding bushing 10 disposed between the inner bracket 5 and the sealing cover 6, wherein a central hole of the guiding bushing 10 cooperates with the guide rod 4-2 to form a sliding connection. By arranging the guide bush 10, the guide positioning distance of the guide rod 4-2 is effectively increased, so that the switch bolt 4 makes linear motion, and the opening and closing performance of the switch bolt 4 is ensured.

According to another embodiment of the present invention, it further comprises that the bottom surface of the inner bracket 5 is further provided with an annular flange 5-3, and the annular flange 5-3 is adapted to the outer wall of the bolt body 4-1. When the switch bolt 4 is reset, the annular flange 5-3 is matched with the outer wall of the bolt body 4-1, and the stability of contact sealing is further ensured.

According to another embodiment of the present invention, further comprising that the first sealing ring 7 is an O-ring. The sealing performance of the inner support 5 is ensured.

According to another embodiment of the present invention, further comprising, the number of the first sealing rings 7 is at least three. Further improving the sealing performance of the inner bracket 5.

According to another embodiment of the present invention, it further comprises that the end of the guide rod 4-2 is provided with a limit step 4-3. When the switch bolt 4 moves downwards, when the limit step 4-3 is tightly abutted against the end face of the guide bush 10, the limit step 4-3 plays an effective limit role, at the moment, the bolt body 4-1 is separated from the inner support 5, and the upper cavity and the lower cavity of the inner cylinder body 2 are communicated.

The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A pneumatic rod with excellent opening and closing performance comprises an outer cylinder body (1), wherein an inner cylinder body (2) is connected in the outer cylinder body (1) in a sliding mode, a piston (3) is connected in the inner cylinder body (2) in a sliding mode, a rod portion (3-1) of the piston (3) is connected with the bottom wall of the outer cylinder body (1) in a rotating mode, a switch bolt (4) is connected to the end portion of the inner cylinder body (2), the switch bolt (4) comprises a bolt body (4-1) and a guide rod (4-2), and the pneumatic rod is characterized in that the switch bolt (4) is connected with the inner cylinder body (2) through an inner support (5) and a sealing cover (6), the inner support (5) is fixed to the inner wall of the inner cylinder body (2), the sealing cover (6) seals the end portion of the inner cylinder body (2), and the bolt body (4-1) of the switch bolt (4) is in, the guide rod (4-2) passes through the middle hole (5-1) of the inner bracket (5) and the sealing cover (6) and extends out, the diameter of the middle hole (5-1) is larger than that of the guide rod (4-2), a first sealing ring (7) is arranged on the outer wall of the inner support (5), a second sealing ring (9) is fixedly bonded on the bolt body (4-1), an annular groove (5-2) corresponding to the second sealing ring (9) is arranged on the bottom surface of the inner support (5), the inner cylinder body (2) is provided with an air passage (2-1) which is connected with the upper cavity and the lower cavity, the side wall of the sealing cover (6) is provided with a vent hole (6-1), a vent pipe (8) is sleeved in the vent hole (6-1), two ends of the vent pipe (8) are respectively communicated with the air passage (2-1) and the middle hole of the inner bracket (5).

2. The pneumatic rod with excellent opening and closing performance as claimed in claim 1, wherein a guide bushing (10) is arranged between the inner support (5) and the sealing cover (6), and a middle hole of the guide bushing (10) is matched with the guide rod (4-2) to form sliding connection.

3. The pneumatic rod with excellent opening and closing performance as claimed in claim 1, wherein the bottom surface of the inner support (5) is further provided with an annular flange (5-3), and the annular flange (5-3) is matched with the outer wall of the bolt body (4-1).

4. The pneumatic rod with excellent opening and closing performance as claimed in claim 1, wherein the first sealing ring (7) is an O-shaped sealing ring.

5. The pneumatic rod with excellent opening and closing performance as claimed in claim 4, wherein the number of the first sealing rings (7) is at least three.

6. The pneumatic rod with excellent opening and closing performance as claimed in claim 2, wherein the end of the guide rod (4-2) is provided with a limiting step (4-3).