CN215377267U

CN215377267U - Dustproof, waterproof and explosion-proof three-proofing key structure

Info

Publication number: CN215377267U
Application number: CN202121470270.0U
Authority: CN
Inventors: 任爱华; 孙巍
Original assignee: Baoding Shenchen Precision Pump Co ltd
Current assignee: Baoding Shenchen Precision Pump Co ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2021-12-31
Anticipated expiration: 2031-06-30

Abstract

The utility model discloses a dustproof, waterproof and explosion-proof three-proofing key structure, and belongs to the technical field of equipment accessories. The structure comprises a key shaft and a key for applying pressure to the key shaft, wherein the key shaft is sleeved with a spring; the pressing ring and the shaft sleeve below the pressing ring are also included; the middle part and the lower part of the key are both positioned in the pressure ring and can move up and down in the pressure ring; the key shaft is positioned in the shaft sleeve. The utility model has the advantages of small occupied space, compact structure and dustproof, waterproof and explosion-proof effects.

Description

Dustproof, waterproof and explosion-proof three-proofing key structure

Technical Field

The utility model relates to the technical field of equipment accessories, in particular to a dustproof, waterproof and explosion-proof three-proofing key structure.

Background

In daily production activities of people, there are many flammable and explosive environments. Explosion-proof electrical equipment needs to be used in such an environment. The use of electrical equipment involves switching problems of the electrical equipment. At present, switches are mostly arranged outside a dangerous environment, and only electrified cables are arranged in the dangerous environment. However, as more mobile explosion-proof devices are used, explosion-proof buttons are used more and more as switch devices.

The existing key device cannot be well applied to high-power equipment, generally adopts a key mode of an explosion-proof structure with a larger structure, works by pressing a inching switch and other similar elements in an explosion-proof shell, and has the defects of larger and more complex overall structure and cannot be well applied to a smaller and compact-space explosion-proof shell.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a dustproof, waterproof and explosion-proof three-proof key structure. The key structure has the advantages of small occupied space, compact structure and dustproof and waterproof effects.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:

a dustproof, waterproof and explosion-proof three-prevention key structure comprises a key shaft and a key for applying pressure to the key shaft, wherein a spring is sleeved on the key shaft; the pressing ring and the shaft sleeve below the pressing ring are also included; the middle part and the lower part of the key are both positioned in the pressure ring and can move up and down in the pressure ring; the key shaft is positioned in the shaft sleeve.

Furthermore, a conical sealing ring is sleeved on the lower half part of the key; the bottom of the conical sealing ring is a flared end, and a necking end at the top is positioned in the pressing ring; the pressing ring is located at the top of the shaft sleeve, and the edge of the flared end is tightly clamped between the pressing ring and the shaft sleeve.

Furthermore, the axis of clamping ring and axle sleeve axis coincide.

Furthermore, the outer wall of the pressing ring and the outer wall of the shaft sleeve are both provided with external threads.

Furthermore, the top of the shaft sleeve and the top of the compression ring are both provided with grooves convenient to mount.

Furthermore, the spring is sleeved on the lower half part of the key shaft, and one end of the top of the spring is pressed against the middle position of the key shaft.

Further, the inner diameter of the bottom of the shaft sleeve is contracted; one end of the bottom of the spring is pressed on the inner wall formed by the shrinkage of the inner diameter of the bottom of the shaft sleeve.

Furthermore, the inner diameter of the top of the compression ring is contracted to form a necking structure, and the middle part of the outer wall of the key is provided with a flange used for matching with the necking mechanism; the flange is positioned in the necking structure and used for preventing the key from being separated.

Furthermore, a circle of groove for installing the sealing ring is arranged on the outer wall of the pressing ring.

The utility model adopts the technical scheme to produce the beneficial effects that:

the key structure has the effects of water resistance, explosion resistance and dust prevention, occupies small space, has a compact structure and is suitable for various types of equipment.

Drawings

Fig. 1 is an exploded schematic view of an embodiment of the present invention.

Fig. 2 is a cross-sectional view of an embodiment of the present invention.

In the figure: 1. a key 2, a cover plate 3, a conical sealing ring 4, a pressure ring 5, a sealing ring 6, a key shaft 7, a shaft sleeve 8, a spring 9 and an explosion-proof shell,

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Furthermore, the axis of clamping ring and axle sleeve axis coincide.

The following is a more specific example:

referring to fig. 1 to 2, the present embodiment includes a key 1, a pressing ring 4, a seal ring 5, a taper seal ring 3, a key shaft 6, a sleeve 7, and a spring 8.

The middle part and the lower part of the key are both positioned in the pressure ring and can move up and down in the pressure ring; the key shaft is positioned in the shaft sleeve; the lower half part of the key is sleeved with a conical sealing ring; the bottom of the conical sealing ring is a flared end, and the flared end of the top is positioned in the pressing ring; the press ring is arranged at the top of the shaft sleeve, and the edge of the flared end is tightly clamped between the press ring and the shaft sleeve. The spring is sleeved on the lower half part of the key shaft. The inner diameter of the bottom of the shaft sleeve is contracted; the other end of the spring presses on the inner wall formed by the shrinkage of the inner diameter at the bottom of the shaft sleeve.

The inner diameter of the top of the compression ring is contracted to form a necking structure, and the middle part of the outer wall of the key is provided with a flange used for matching with the necking mechanism; the flange is positioned in the necking structure and used for preventing the key from being separated.

And a circle of groove for mounting the sealing ring is arranged on the outer wall of the compression ring. In the embodiment, the shaft sleeve is screwed on the explosion-proof shell through threads, the threads meet the requirements of an explosion-proof joint surface, the depth of the threads is greater than 8mm, and the thread pitch is 1 mm. The spring and the key shaft are arranged in the shaft sleeve, the cylindrical matching surface of the key shaft and the threaded shaft sleeve meets the requirement of an explosion-proof joint surface, the gap of the cylindrical joint surface is less than 0.15mm, and the length of the joint surface is greater than 25 mm.

The installation mode of this embodiment:

firstly, screwing the shaft sleeve onto the explosion-proof shell through a groove at the top of the shaft sleeve;

and secondly, sequentially installing the spring and the key shaft into the shaft sleeve.

And thirdly, sleeving a small head of the conical sealing ring on the lower half part of the key.

Fourthly, embedding the key with the conical sealing ring into the pressing ring, wherein the sealing ring is embedded into the pressing ring;

fifthly, sleeving a sealing ring on the outer wall of the pressure ring, and screwing the pressure ring into the explosion-proof shell 9 to enable the pressure ring and the shaft sleeve to jointly press the bottom edge of the conical sealing ring;

and sixthly, mounting the cover plate 2 on the top of the key to shield other parts.

When the key is pressed by a finger, the key drives the key shaft to move downwards to reach the lower stop point, and meanwhile, the key shaft compresses the spring, and meanwhile, the key enables the conical close ring to elastically deform.

When the key reaches the lower dead point, the finger is loosened, the spring bounces the key in the axial direction to drive the key to reset, and meanwhile, the deformation of the conical sealing ring resets.

Claims

1. A dustproof, waterproof and explosion-proof three-prevention key structure comprises a key shaft and a key for applying pressure to the key shaft, wherein a spring is sleeved on the key shaft; the device is characterized by also comprising a pressure ring and a shaft sleeve below the pressure ring; the middle part and the lower part of the key are both positioned in the pressure ring and can move up and down in the pressure ring; the key shaft is positioned in the shaft sleeve; the lower half part of the key is sleeved with a conical sealing ring; the bottom of the conical sealing ring is a flared end, and a necking end at the top is positioned in the pressing ring; the pressing ring is located at the top of the shaft sleeve, and the edge of the flared end is tightly clamped between the pressing ring and the shaft sleeve.

2. The dustproof, waterproof and explosion-proof three-proofing key structure according to claim 1, wherein the central axis of the compression ring is coincident with the central axis of the shaft sleeve.

3. The dustproof, waterproof and explosion-proof three-proofing key structure according to claim 1, wherein the outer wall of the compression ring and the outer wall of the shaft sleeve are both provided with external threads.

4. The dustproof, waterproof and explosion-proof three-proofing key structure according to claim 3, wherein grooves for facilitating installation are formed in the top of the shaft sleeve and the top of the compression ring.

5. The dustproof, waterproof and explosion-proof three-proofing key structure according to claim 1, wherein the spring is sleeved on the lower half portion of the key shaft, and one end of the top of the spring abuts against the middle position of the key shaft.

6. The dustproof, waterproof and explosion-proof three-proofing button structure according to claim 5, wherein the inner diameter of the bottom of the shaft sleeve is contracted; one end of the bottom of the spring is pressed on the inner wall formed by the shrinkage of the inner diameter of the bottom of the shaft sleeve.

7. The dustproof, waterproof and explosion-proof three-proofing key structure according to claim 1, wherein the inner diameter of the top of the compression ring is contracted to form a necking structure, and a flange for matching with the necking mechanism is arranged in the middle of the outer wall of the key; the flange is positioned in the necking structure and used for preventing the key from being separated.

8. The dustproof, waterproof and explosion-proof three-proofing key structure according to claim 1, wherein a circle of groove for mounting a sealing ring is formed in the outer wall of the compression ring.