CN216438858U

CN216438858U - Seat lift air leg

Info

Publication number: CN216438858U
Application number: CN202123235268.8U
Authority: CN
Inventors: 林芳健
Original assignee: Suzhou Semus Precision Machinery Co ltd
Current assignee: Suzhou Semus Precision Machinery Co ltd
Priority date: 2021-12-21
Filing date: 2021-12-21
Publication date: 2022-05-06
Anticipated expiration: 2031-12-21

Abstract

The utility model discloses a seat lifting pneumatic rod, which comprises an inner pipe and an outer pipe arranged outside the inner pipe, the piston assembly, control valve subassembly and seal assembly are equipped with in the outer tube, control valve subassembly with inner tube one end is connected, seal assembly includes clamp ring, the sealing washer with the inner tube chucking, inwards the concave ring-shaped groove that forms from clamp ring periphery, inwards the concave joint groove that forms from ring-shaped groove side wall, the outer end of ring-shaped groove is formed with the first face of holding of slope, the outer end of inner tube is formed with annular clamping portion, inner tube and clamp ring equipment, clamping portion and the assembly of joint groove, the bottom surface of clamping portion and the annular groove bottom surface are held in the counterbalance, extend to the central line from the inner tube inner wall and form the flange structure, flange structure outer end face is the second face of holding of slope, the second face of holding of flange structure and the first face of holding of clamp ring are held in the counterbalance, install between annular groove and the inner tube the sealing washer. The utility model has simple structure and good sealing effect.

Description

Seat lift air leg

Technical Field

The utility model relates to the technical field of pneumatic rods, in particular to a seat lifting pneumatic rod.

Background

CN211186493U discloses a pneumatic rod, it includes piston assembly, piston assembly includes piston rod, piston head and cover and establishes sealing assembly outside the piston rod, sealing assembly establishes the clamp ring at the piston rod surface including the cover, the clamp ring outside is provided with the calathiform sealing washer, the calathiform sealing washer outside is provided with piston rod support piece, the piston rod support piece outside is provided with inner tube support piece, the piston rod support piece overcoat is equipped with ventilative support, ventilative support is laminated with the outer tube inner wall mutually, the shortcoming is, sealing assembly structure is complicated, sealed effect is poor, increase manufacturing cost, reduction work efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems of complex structure and poor sealing effect of the existing sealing assembly, and provides a seat lifting pneumatic rod.

In order to achieve the purpose, the utility model adopts the following technical scheme: a seat lifting pneumatic rod comprises an inner tube, an outer tube arranged outside the inner tube and a piston assembly arranged in the inner tube, wherein a control valve assembly and a sealing assembly are arranged inside the outer tube, the control valve assembly is connected with one end of the inner tube, the sealing assembly is connected with the other end of the inner tube, the sealing assembly comprises a compression ring and a sealing ring which are clamped with the inner tube, an annular groove is formed by inwards recessing the periphery of the compression ring, a clamping groove is formed by inwards recessing the side wall of the annular groove, an inclined first abutting surface is formed at the outer end of the annular groove, an annular clamping part is formed at the outer end of the inner tube, the inner tube is assembled with the compression ring, the clamping part is assembled with the clamping groove, the bottom surface of the clamping part abuts against the bottom surface of the annular groove, and a flange structure is formed by extending from the inner wall of the inner tube to a central line, the outer end face of the flange structure is an inclined second abutting face, the second abutting face of the flange structure abuts against the first abutting face of the compression ring, and the sealing ring is installed between the annular groove and the inner pipe.

The inner wall of the clamping part is flush with the inner wall of the inner pipe.

The inner end face of the flange structure is perpendicular to the inner wall of the inner pipe.

At least two grooves are arranged on the outer surface of the inner pipe, and the grooves are formed by being concavely arranged along the length direction of the inner pipe.

Piston assembly includes the piston rod and fixes the terminal piston of piston rod, piston movable mounting is in inside the inner tube, the one end of piston is provided with the cover and establishes piston gasket on the piston rod, the other end of piston is provided with the cover and establishes groove of trough of belt gasket on the piston rod, groove of trough of belt gasket tip is provided with the draw-in groove, install the steel wire jump ring in the draw-in groove, the steel wire jump ring cover is established on the piston rod.

The control valve component comprises a valve body, a valve needle arranged at the center of the valve body and a spacer sleeve arranged between the valve body and the valve needle, wherein a front jacking sleeve is arranged at the end part of the valve body, a cylindrical hole is formed in the front jacking sleeve, a starting rod is arranged in the hole, and the starting rod slides back and forth in the hole and corresponds to the valve needle on the valve body.

In summary, due to the adoption of the technical scheme, the utility model has the beneficial effects that: the sealing ring is arranged between the annular groove and the inner pipe, so that the sealing effect is improved, the bottom surface of the clamping part abuts against the bottom surface of the annular groove, the second abutting surface of the flange structure abuts against the first abutting surface of the compression ring, the contact area between the inner pipe and the compression ring is increased, and the sealing effect is good; meanwhile, the application of a bowl-shaped sealing ring, a piston rod supporting piece, an inner pipe supporting piece and a ventilating support is eliminated, the production cost is reduced, and the working efficiency is improved.

Drawings

FIG. 1 is a cross-sectional view of a seat lifter pneumatic lever of the present invention;

FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;

FIG. 3 is an enlarged view of the structure at B in FIG. 1;

FIG. 4 is a schematic view of the inner tube and seal assembly of FIG. 1;

FIG. 5 is an enlarged view of the structure at C in FIG. 4;

fig. 6 is a schematic cross-sectional view of the inner tube of fig. 5.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 6, the present invention is a seat lifting pneumatic rod, including an inner tube 1, an outer tube 2 disposed outside the inner tube 1, and a piston assembly 3 disposed in the inner tube 1, wherein a control valve assembly 4 and a sealing assembly 5 are disposed inside the outer tube 2, the control valve assembly 4 is connected to one end of the inner tube 1, and the sealing assembly 5 is connected to the other end of the inner tube 1.

Referring to fig. 2, the piston assembly 3 includes a piston rod 31 and a piston 32 fixed to an end of the piston rod 31. The piston 32 is movably arranged in the inner tube 1, one end of the piston 32 is provided with a piston gasket 33 sleeved on the piston rod 31, and the other end of the piston 32 is provided with a gasket 34 with a groove sleeved on the piston rod 31. The end portion of the gasket 34 with the groove is provided with a clamping groove 341, a steel wire clamp spring 35 is installed in the clamping groove 341, and the steel wire clamp spring 35 is sleeved on the piston rod 31.

Referring to fig. 1 and 3, the control valve assembly 4 includes a valve body 41, a valve needle 42 disposed at the center of the valve body 41, and a spacer 43 disposed between the valve body 41 and the valve needle 42. The end part of the valve body 41 is provided with a front top sleeve 44, a cylindrical hole 45 is arranged on the front top sleeve 44, a starting rod 46 is arranged in the hole 45, and the starting rod 46 slides back and forth in the hole 45 and is arranged corresponding to the valve needle 42 on the valve body 41.

Referring to fig. 4 and 5, the sealing assembly 5 includes a compression ring 51, a sealing ring 52, which is clamped with the inner tube 1. An annular groove 511 is formed by inwards recessing the outer periphery of the compression ring 51, a clamping groove 512 is formed by inwards recessing the side wall of the annular groove 511, and an inclined first abutting surface 513 is formed at the outer end of the annular groove 511.

An annular clamping part 11 is formed at the outer end of the inner pipe 1, the inner pipe 1 is assembled with the compression ring 51, the clamping part 11 is assembled with the clamping groove 512, and the bottom surface of the clamping part 11 is propped against the bottom surface of the annular groove 511. The inner wall of the retainer 11 is flush with the inner wall of the inner tube 1.

A flange structure 12 is formed by extending from the inner wall of the inner pipe 1 to the central line, the outer end face of the flange structure 12 is an inclined second abutting face 121, and the inner end face of the flange structure 12 is perpendicular to the inner wall of the inner pipe 1. The second abutment surface 121 of the flange structure 12 abuts against the first abutment surface 513 of the compression ring 51. The sealing ring 52 is installed between the annular groove 511 and the inner tube 1.

At least two grooves 13 are formed in the outer surface of the inner pipe 1, and the grooves 13 are formed in a concave mode along the length direction of the inner pipe 1. Specifically, the number of the grooves 13 is 2-8, and the shape of the grooves 13 is preferably arc-shaped, and triangular, trapezoidal, square, and the like can also be adopted. The inner tube 1 is made of plastic, such as PVC, ABS or nylon.

The utility model has the beneficial effects that: the sealing effect is improved by arranging the annular clamping part 11 at one end of the inner pipe 1 for clamping and connecting with the clamping groove 512 of the compression ring 51, arranging the sealing ring 52 between the annular groove 511 and the inner pipe 1, wherein the bottom surface of the clamping part 11 is abutted against the bottom surface of the annular groove 511, and the second abutting surface 121 of the flange structure 12 is abutted against the first abutting surface 513 of the compression ring 51, so that the contact area between the inner pipe 1 and the compression ring 51 is increased, and the sealing effect is good; meanwhile, the application of a bowl-shaped sealing ring, a piston rod supporting piece, an inner pipe supporting piece and a ventilating support is eliminated, so that the production cost is reduced, and the working efficiency is improved; through set up recess 13 at inner tube 1 surface, play ventilative ventilation effect, reduce burnt flavor.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. A seat lifting pneumatic rod is characterized by comprising an inner tube, an outer tube arranged outside the inner tube and a piston assembly arranged in the inner tube, wherein a control valve assembly and a sealing assembly are arranged inside the outer tube, the control valve assembly is connected with one end of the inner tube, the sealing assembly is connected with the other end of the inner tube, the sealing assembly comprises a compression ring and a sealing ring which are clamped with the inner tube, an annular groove is formed by inwards recessing the periphery of the compression ring, a clamping groove is formed by inwards recessing the side wall of the annular groove, an inclined first abutting surface is formed at the outer end of the annular groove, an annular clamping part is formed at the outer end of the inner tube, the inner tube is assembled with the compression ring, the clamping part is assembled with the clamping groove, the bottom surface of the clamping part abuts against the bottom surface of the annular groove, and a flange structure is formed by extending from the inner wall of the inner tube to the central line, the outer end face of the flange structure is an inclined second abutting face, the second abutting face of the flange structure abuts against the first abutting face of the compression ring, and the sealing ring is installed between the annular groove and the inner pipe.

2. The seat-lift air lever as set forth in claim 1, wherein an inner wall of said catch is flush with an inner wall of said inner tube.

3. The seat lifter bar of claim 2, wherein the inner end surface of the flange structure is perpendicular to the inner wall of the inner tube.

4. The seat lifter pneumatic bar of claim 1 or 3, wherein at least two grooves are formed from an outer surface of the inner tube, the grooves being recessed along a length of the inner tube.

5. The seat lift pneumatic rod as claimed in claim 1, wherein the piston assembly comprises a piston rod and a piston fixed at the end of the piston rod, the piston is movably mounted inside the inner tube, one end of the piston is provided with a piston gasket sleeved on the piston rod, the other end of the piston is provided with a groove gasket sleeved on the piston rod, the end part of the groove gasket is provided with a clamping groove, a steel wire clamp spring is mounted in the clamping groove, and the steel wire clamp spring is sleeved on the piston rod.

6. The seat-lift pneumatic rod as claimed in claim 5, wherein the control valve assembly comprises a valve body, a valve needle disposed at the center of the valve body, and a spacer sleeve disposed between the valve body and the valve needle, the valve body is provided with a front top sleeve at an end thereof, the front top sleeve is provided with a cylindrical hole, the hole is provided with an actuating rod, and the actuating rod slides back and forth in the hole and is disposed corresponding to the valve needle on the valve body.