CN216131296U - Fastening piece for breathing dust filter and breathing dust filter - Google Patents
Fastening piece for breathing dust filter and breathing dust filter Download PDFInfo
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- CN216131296U CN216131296U CN202121720604.5U CN202121720604U CN216131296U CN 216131296 U CN216131296 U CN 216131296U CN 202121720604 U CN202121720604 U CN 202121720604U CN 216131296 U CN216131296 U CN 216131296U
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- mounting hole
- cantilever
- fastener
- baffle ring
- elastic
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Abstract
The utility model provides a fastener and a breathing dust filter comprising the same. The fastener of the utility model comprises: the cylinder is matched with the respiratory plug mounting hole and the baffle ring mounting hole; the head is fixedly arranged at one end part of the column body; and the elastic locking part is fixedly arranged at the other end part of the cylinder, wherein the elastic locking part comprises a plurality of elastic cantilever parts which are arranged at intervals along the circumferential direction of the cylinder, each elastic cantilever part comprises a cantilever body and a locking bulge, the cantilever body extends along the axial direction of the cylinder to the direction far away from the head, the locking bulge is arranged on the outer side of the free end part of the cantilever body and can be locked on the edge of the opening of the breather plug mounting hole or the baffle ring mounting hole, and when the fastener is pushed and pressed, the locking bulge is contacted with the inner wall of the baffle ring mounting hole or the breather plug mounting hole, the diameter of the elastic locking part can be elastically reduced.
Description
Technical Field
The utility model belongs to the technical field of train accessories, and particularly relates to a fastening piece for a breathing dust filter and the breathing dust filter comprising the fastening piece.
Background
The breathing dust filter is an essential part of a brake disc of a railway train. In the process of braking and relieving the train, the inner cavity of the brake disc has the breathing function of gas communication with the outside. The breathing dust filter is arranged at the vent of the brake disc and plays the roles of passive breathing and dust filtration.
The conventional breathing dust filter comprises a breathing plug and a baffle ring, wherein the breathing plug is fixedly arranged on a ventilation opening of a brake disc in a threaded connection mode, a first ventilation hole extending along the length direction of the breathing plug is formed in the breathing plug, and at least one second ventilation hole communicated with the first ventilation hole is formed in the side part of the breathing plug; the baffle ring is sleeved on the side part of the breathing plug so as to block dust entering the second vent hole from the outside. However, during the operation of the train, the baffle ring is easy to fall off from the breathing plug due to vibration or bump.
SUMMERY OF THE UTILITY MODEL
The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a fastening member for a respiratory dust filter and a respiratory dust filter including the same, which have a good locking effect and can effectively prevent a retainer ring from falling off a breather plug; moreover, the structure is simple and the assembly and disassembly are convenient.
In order to achieve the purpose, the utility model adopts the following technical scheme:
< first embodiment >
The utility model provides a fastener for fastening a baffle ring in a respiratory dust filter on a respiratory plug, wherein the side part of the respiratory plug is provided with a through hole as a respiratory plug mounting hole, and the baffle ring is provided with a through hole matched with the respiratory plug mounting hole as a baffle ring mounting hole, and the fastener is characterized by comprising the following components: the cylinder is matched with the respiratory plug mounting hole and the baffle ring mounting hole; the head is fixedly arranged at one end part of the column body; and the elastic locking part is fixedly arranged at the other end part of the cylinder, wherein the elastic locking part comprises a plurality of elastic cantilever parts which are arranged at intervals along the circumferential direction of the cylinder, each elastic cantilever part comprises a cantilever body and a locking bulge, the cantilever body extends along the axial direction of the cylinder to the direction far away from the head, the locking bulge is arranged on the outer side of the free end part of the cantilever body and can be locked on the edge of the opening of the breather plug mounting hole or the baffle ring mounting hole, and when the fastener is pushed and pressed, the locking bulge is contacted with the inner wall of the baffle ring mounting hole or the breather plug mounting hole, the diameter of the elastic locking part can be elastically reduced.
In the fastener provided by the utility model, the following characteristics can be provided: the end surface of the locking protrusion facing the head is used as a locking surface and is perpendicular to the axial direction of the column.
In the fastener provided by the utility model, the following characteristics can be provided: wherein, the junction between the lateral surface of locking surface and cantilever body does not have the chamfer.
In the fastener provided by the utility model, the following characteristics can be provided: wherein the thickness of the cantilever body in the radial direction of the cylinder is 60-80% of the radius of the cylinder.
In the fastener provided by the utility model, the following characteristics can be provided: the elastic cantilever part is provided with a slope which gradually extends outwards from the free end surface of the cantilever body along the direction towards the head to the outer side surface of the locking protrusion and is used as a leading-in surface.
In the fastener provided by the utility model, the following characteristics can be provided: the elastic cantilever part is provided with an inclined surface which is gradually extended inwards from the free end surface of the cantilever body along the direction towards the head part to the inner side surface of the cantilever body and is used as an avoiding surface.
In the fastener provided by the utility model, the following characteristics can be provided: the number of the elastic cantilever parts is three or four, and the three or four elastic cantilever parts are arranged on the free end surface of the cantilever body at equal intervals.
In the fastener provided by the utility model, the following characteristics can be provided: wherein, the elastic locking part, the column body and the head part are integrally formed.
< scheme two >
The utility model also provides a breathing dust filter which is arranged at the vent of a train brake disc and is characterized by comprising: the end face of the breathing plug is provided with a blind hole which extends along the length direction of the breathing plug and is used as a first vent hole, and the side part of the breathing plug is provided with a through hole which is used as a mounting hole of the breathing plug and at least one second vent hole which is respectively communicated with the first vent hole; the baffle ring is C-shaped and is arranged on the side part of the breathing plug, a through hole matched with the mounting hole of the breathing plug is arranged in the middle of the baffle ring to serve as a baffle ring mounting hole, and at least one groove which corresponds to at least one second vent hole and extends along the thickness direction of the baffle ring is arranged on the inner side part of the baffle ring to serve as a vent groove; and a fastener for fastening the baffle ring to the respirator, wherein the fastener is the fastener of < scheme one >.
In the respiratory dust filter provided by the utility model, the respiratory dust filter also has the following characteristics: wherein, the cross section shape of ventilation recess is circular-arc.
Action and effect of the utility model
According to the fastener and the breathing dust filter comprising the fastener, because the fastening piece is provided with the column body, the head parts and the elastic locking parts which are respectively and fixedly arranged at the two end parts of the column body, the elastic locking parts comprise a plurality of elastic cantilever parts which are arranged at intervals along the circumferential direction of the column body, each elastic cantilever part comprises a cantilever body and a locking bulge, the cantilever body extends along the axial direction of the column body in the direction far away from the head part, the locking bulge is arranged on the outer side of the free end part of the cantilever body and can be locked on the edge of the opening of the breathing plug mounting hole or the baffle ring mounting hole, when the fastener is pushed so that the locking projection is brought into contact with the inner wall of the retainer mounting hole or the breather plug mounting hole, the diameter of the elastic locking portion can be elastically reduced, therefore, the utility model can fasten the baffle ring on the breather plug, thereby effectively preventing the baffle ring from falling off from the breather plug; moreover, the structure is simple, and the disassembly and the assembly are convenient.
Drawings
FIG. 1 is a side view of a respiratory dust filter in a first state of use in accordance with an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a perspective view of a fastener in an embodiment of the utility model;
FIG. 4 is a side view of a respiratory filter in a second state of use in accordance with an embodiment of the present invention; and
fig. 5 is a sectional view taken along line B-B in fig. 4.
Detailed Description
The concept, specific structure and technical effects of the present invention will be further described with reference to the accompanying drawings so as to fully understand the objects, features and effects of the fastening member for a respiratory filter of the present invention and the respiratory filter including the fastening member.
< example >
FIG. 1 is a side view of a respiratory dust filter in a first state of use in accordance with an embodiment of the present invention; fig. 2 is a sectional view taken along line a-a of fig. 1.
As shown in fig. 1 and 2, in the present embodiment, the breathing dust filter 100 is disposed at a vent of a brake disc of a train, and is used for protecting the vent from dust while ensuring normal ventilation of the vent. The respiratory dust filter 100 includes: a breather plug 10, a baffle ring 20, and a fastener 30.
As shown in fig. 1 and 2, the breather plug 10 is made of a metal material, has a shape matching the ventilation opening of a train brake disc, and has a blind hole as a first ventilation hole 11 at an end surface thereof, extending in the length direction of the breather plug 10. The side part of the breathing plug 10 is provided with two second vent holes 12 which are symmetrically arranged, and the two second vent holes 12 are respectively communicated with the first vent hole 11; the side of the breather plug 10 is also provided with a through hole penetrating the breather plug 10 as a breather plug mounting hole 13. In the present embodiment, the breather plug mounting hole 13 is arranged along the diameter direction of the breather plug 10 and communicates with the first vent hole 11 at the middle portion, and is perpendicular to the two second vent holes 12; the breather plug mounting hole 13 and the vent hole 12 are both circular holes with the same inner diameter.
As shown in fig. 1 and 2, the baffle ring 20 is in a shape of a C matching the shape of the respiratory plug 10 and is mounted on the side of the respiratory plug 10. The inner side parts of the two ends of the baffle ring 20 are provided with two grooves which correspond to the two second ventilation holes 12 and respectively extend along the thickness direction of the baffle ring 20 as ventilation grooves 21, and the cross section of each ventilation groove 12 is in an arc shape; the middle position of the baffle ring 20 is provided with a through hole matched with the breathing plug mounting hole 13 as a baffle ring mounting hole 22. In the present embodiment, the retainer ring 20 is made of plastic.
FIG. 3 is a perspective view of a fastener in an embodiment of the utility model.
As shown in fig. 1 to 3, the fastening member 30 is used to fasten the baffle ring 20 to the respiratory plug 10, and includes a post 31, a head 32 and a resilient locking portion 33, which are integrally formed of plastic.
As shown in fig. 1-3, the post 31 is a cylinder that mates with both the plug mounting hole 13 and the baffle mounting hole 22.
As shown in fig. 1 to 3, the head 32 is fixedly provided at one end of the column 31 and is a flat cylinder. A pushing blind hole 321 is formed at a central position of an outer end surface of the cylindrical body, and the pushing blind hole 321 is used for a tool such as a screwdriver to be inserted so as to conveniently push the entire fastener 30. In this embodiment, a chamfer is provided between the inner end surface of the head 32 and the outer side surface of the column 31.
As shown in fig. 1 to 3, the elastic locking portion 33 is fixedly disposed at the other end of the cylinder 31 and includes four elastic cantilever members 331.
Four elastic cantilever members 331 are provided on the end surface of the main body 31 in a circumferentially equally spaced arrangement of the cylindrical body 31. Each of the resilient cantilever members 331 includes a cantilever body 3311 and a locking protrusion 3312.
The cantilever body 3311 extends in the axial direction of the cylindrical body 31 away from the head 32, and the thickness of the cantilever body 3311 in the radial direction of the cylindrical body 31 is 60 to 80% of the radius of the cylindrical body 31.
The locking protrusion 3312 is provided on the outer side of the free end portion of the cantilever body 3311.
As shown in fig. 1 and 2, when the fastening member 30 is pushed such that the locking protrusions 3312 come into contact with the inner wall of the stopper mounting hole 22, the elastic cantilever members 331 are bent inward by the reverse pushing pressure of the stopper mounting hole 22 on each locking protrusion 3312, so that the diameter of the entire elastic locking portion 30 is elastically reduced to sequentially pass through the stopper mounting hole 22 and the breather plug mounting hole 13. After the locking protrusion 3312 is exposed to the outside of the plug mounting hole 13, the end surface of the locking protrusion 3312 facing the head portion 32 as a locking surface 3312a can be locked on the edge of the opening of the plug mounting hole 13. In the present embodiment, the locking surface 3312a is perpendicular to the axial direction of the cylinder 31, and the joint between the locking surface 3312 and the outer side surface of the cantilever body 3311 is not chamfered.
In the present embodiment, the elastic cantilever member 331 has, as a lead-in surface 331a, a slope extending from the free end surface of the cantilever body 3311 to the outer side surface of the locking protrusion 3312 gradually outward in the direction toward the head 32; the elastic arm member 331 has a sloped surface extending inward from the free end surface of the arm body 3311 toward the head portion 32 to the inner surface of the arm body 3311 as a relief surface 331 b.
Effects and effects of the embodiments
According to the fastening member and the respiratory dust filter including the fastening member of the present embodiment, since the fastening member has the column body, and the head portion and the elastic locking portion respectively fixedly provided at both end portions of the column body, the elastic locking portion includes a plurality of elastic cantilever members arranged at intervals in the circumferential direction of the column body, each of the elastic cantilever members includes a cantilever body extending in the axial direction of the column body in the direction away from the head portion, and a locking protrusion provided on the outer side of the free end portion of the cantilever body and capable of locking on the edge of the opening of the breather plug mounting hole or the baffle ring mounting hole, when the fastener is pushed so that the locking projection is brought into contact with the inner wall of the retainer mounting hole or the breather plug mounting hole, the diameter of the elastic locking portion can be elastically reduced, therefore, the embodiment can fasten the baffle ring on the breathing plug, thereby effectively preventing the baffle ring from falling off from the breathing plug; moreover, the structure is simple, and the disassembly and the assembly are convenient.
In addition, because the end face of the locking protrusion facing the head is used as a locking face to be perpendicular to the axial direction of the cylinder, and the connecting part between the locking face and the outer side face of the cantilever body is not provided with a chamfer, the locking protrusion can be more firmly locked on the edge of the opening of the mounting hole of the breather plug or the mounting hole of the baffle ring, and the fastening effect is further improved.
In addition, because the elastic cantilever part has the inclined surface as the leading-in surface extending from the free end surface of the cantilever body to the outer side surface of the locking protrusion gradually outwards along the direction towards the head, the elastic cantilever part has the inclined surface as the avoiding surface extending from the free end surface of the cantilever body to the inner side surface of the cantilever body gradually inwards along the direction towards the head, so that the elastic locking part is more easily inserted into the breathing plug mounting hole or the baffle ring mounting hole, and the diameter of the elastic locking part is easily reduced.
In addition, because the radial thickness of the cantilever body is 60-80% of the radius of the cylinder, the deformation elasticity of the elastic cantilever part is effectively ensured, and the space for the elastic cantilever part to generate elastic deformation is also ensured.
In addition, because the elastic locking part, the cylinder and the head are integrally formed, the fastener is an integral piece, connection and assembly are not needed, and the fastening effect is further ensured.
It should be understood by those skilled in the art that the above-mentioned embodiments are preferred examples of the present invention, and are intended to convey the understanding of the present invention to those skilled in the art, rather than to limit the scope of the present invention.
For example, in the above embodiment, the elastic locking portion of the fastener employs four cantilever members arranged at equal intervals. However, in the present invention, the elastic locking portion may also employ three or five cantilever members arranged at equal intervals.
For another example, in the above-described embodiment, the locking protrusion is locked on the edge of the opening of the plug mounting hole through the baffle ring mounting hole and the plug mounting hole in this order. However, in the present invention, as shown in fig. 4 and 5, the locking protrusion may be locked on the edge of the opening outside the retainer mounting hole by passing through the breather plug mounting hole and the retainer mounting hole in sequence.
Claims (10)
1. The utility model provides a fastener for keep off ring fastening on the breather plug in breathing the dust catcher, the lateral part of breather plug is equipped with the through-hole as the breather plug mounting hole, keep off the ring be equipped with the through-hole that the breather plug mounting hole matches is as keeping off ring mounting hole, its characterized in that includes:
the cylinder is matched with the respiratory plug mounting hole and the baffle ring mounting hole;
the head is fixedly arranged at one end part of the column body; and
an elastic locking part fixedly arranged at the other end part of the column body,
wherein the elastic locking part comprises a plurality of elastic cantilever parts arranged at intervals along the circumferential direction of the cylinder,
each elastic cantilever part comprises a cantilever body and a locking bulge,
the cantilever body extends in a direction away from the head along an axial direction of the post,
the locking projection is arranged on the outer side of the free end part of the cantilever body and can be locked on the edge of the opening of the breather plug mounting hole or the baffle ring mounting hole,
when the fastening member is pushed so that the locking protrusion is brought into contact with the inner wall of the baffle ring mounting hole or the breather plug mounting hole, the diameter of the elastic locking portion can be elastically reduced.
2. The fastener of claim 1, wherein:
wherein an end surface of the locking protrusion facing the head is perpendicular to an axial direction of the cylinder as a locking surface.
3. The fastener of claim 2, wherein:
wherein a junction between the locking surface and the outer side surface of the cantilever body is free of a chamfer.
4. The fastener of claim 1, wherein:
wherein the thickness of the cantilever body in the radial direction of the cylinder is 60-80% of the radius of the cylinder.
5. The fastener of claim 1, wherein:
wherein the elastic cantilever member has, as a lead-in surface, a slope extending from a free end surface of the cantilever body to an outer side surface of the locking projection gradually outward in a direction toward the head.
6. The fastener of claim 1, wherein:
the elastic cantilever part is provided with a bevel which is gradually extended inwards from the free end surface of the cantilever body along the direction towards the head part to the inner side surface of the cantilever body and is used as an avoiding surface.
7. The fastener of claim 1, wherein:
wherein the number of the elastic cantilever parts is three or four,
three or four elastic cantilever parts are arranged on the free end surface of the cantilever body at equal intervals.
8. The fastener of claim 1, wherein:
wherein the elastic locking part, the cylinder and the head part are integrally formed.
9. The utility model provides a breathe dust filter, sets up in train brake disc's vent department, its characterized in that includes:
the end face of the breathing plug is provided with a blind hole which extends along the length direction of the breathing plug and is used as a first vent hole, and the side part of the breathing plug is provided with a through hole which is used as a mounting hole of the breathing plug and at least one second vent hole which is respectively communicated with the first vent hole;
the baffle ring is C-shaped and is arranged on the side part of the breathing plug, a through hole matched with the breathing plug mounting hole is arranged in the middle of the baffle ring to serve as a baffle ring mounting hole, and at least one groove which corresponds to at least one second ventilation hole and extends along the thickness direction of the baffle ring is arranged on the inner side part of the baffle ring to serve as a ventilation groove; and
a fastener for fastening the baffle ring on the breathing plug,
wherein the fastener is as claimed in any one of claims 1 to 8.
10. The respiratory filter of claim 9, wherein:
the cross section of the ventilation groove is arc-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121720604.5U CN216131296U (en) | 2021-07-27 | 2021-07-27 | Fastening piece for breathing dust filter and breathing dust filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121720604.5U CN216131296U (en) | 2021-07-27 | 2021-07-27 | Fastening piece for breathing dust filter and breathing dust filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216131296U true CN216131296U (en) | 2022-03-25 |
Family
ID=80768527
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121720604.5U Active CN216131296U (en) | 2021-07-27 | 2021-07-27 | Fastening piece for breathing dust filter and breathing dust filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216131296U (en) |
-
2021
- 2021-07-27 CN CN202121720604.5U patent/CN216131296U/en active Active
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