Ventilation plug and gearbox

Abstract

The utility model provides a ventilation plug and a gearbox, and relates to the technical field of gearbox exhaust, the ventilation plug comprises a body and a ventilation pipe arranged at one end of the body, the body comprises an abutting portion, a first connecting portion arranged on one side of the abutting portion and a second connecting portion arranged on the other side of the abutting portion, and the ventilation pipe is sleeved on the second connecting portion; the body is further provided with a clamping part, the clamping part is arranged at the end, away from the abutting part, of the first connecting part, the gearbox shell is provided with a clamping groove matched with the clamping part, and the first connecting part is connected with the vent hole through clamping between the clamping part and the clamping groove. According to the ventilation plug, the phenomenon that the ventilation plug falls off from the ventilation hole of the gearbox shell due to the fact that the outer diameter of the ventilation plug is reduced can be effectively avoided, the connection stability between the ventilation plug and the ventilation hole of the gearbox shell is improved, the service life of the ventilation plug is prolonged, and normal work of a gearbox is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of gearbox exhaust, and particularly relates to a breather plug and a gearbox. Background Art

[0002] A breather plug is a ventilation structure applied to a gearbox or a speed reducer, mainly used to balance the internal and external pressure difference caused by the temperature rise of the whole machine, so that the internal components of the whole machine work under the allowable pressure conditions.

[0003] The existing breather plugs generally include a breather plug body and a seal. The clearance fit between the breather plug body and the ventilation hole of the gearbox housing, and the interference fit between the seal and the ventilation hole are used to prevent the lubricating oil from leaking through the gap between the ventilation hole and the breather plug body. However, after the existing breather plugs work for a long time in a high-temperature environment, dehydration will occur, the outer diameter of the breather plug will shrink, and it is very easy for the breather plug to fall off from the ventilation hole of the gearbox housing, seriously affecting the normal operation of the gearbox. Summary of the Utility Model

[0004] Based on this, the purpose of the utility model is to provide a breather plug, aiming to solve the technical problem that after the breather plug in the existing technology works for a long time in a high-temperature environment, dehydration will occur, the outer diameter of the breather plug will shrink, and it is very easy for the breather plug to fall off from the ventilation hole of the gearbox housing, seriously affecting the normal operation of the gearbox.

[0005] One aspect of the utility model provides a breather plug for being installed on the ventilation hole of a gearbox housing. The breather plug includes a body and a ventilation pipe arranged at one end of the body. The body includes an abutting part, a first connecting part arranged on one side of the abutting part, and a second connecting part arranged on the other side of the abutting part. The ventilation pipe is sleeved on the second connecting part;

[0006] A clamping part is further arranged on the body. The clamping part is arranged at one end of the first connecting part far away from the abutting part. A clamping groove adapted to the clamping part is arranged on the gearbox housing. The connection between the first connecting part and the ventilation hole is realized through the clamping between the clamping part and the clamping groove.

[0007] Compared with the prior art, the beneficial effects of the vent plug of the present utility model are as follows: By means of the vent plug provided by the present utility model, the phenomenon of falling off from the vent hole of the gearbox housing caused by the reduction of the outer diameter of the vent plug can be effectively avoided, the connection stability between the vent plug and the vent hole of the gearbox housing and the service life of the vent plug are improved, and the normal operation of the gearbox is ensured. Specifically, the vent plug includes a body and a vent pipe provided at one end of the body. The body includes an abutting portion, a first connecting portion provided on one side of the abutting portion, and a second connecting portion provided on the other side of the abutting portion. A clamping portion is provided on the body, and the clamping portion is provided at one end of the first connecting portion away from the abutting portion. A clamping groove adapted to the clamping portion is provided on the gearbox housing. During actual use, the firm connection between the first connecting portion and the vent hole is realized through the clamping between the clamping portion and the clamping groove, and further the reliable installation of the vent plug on the vent hole of the gearbox housing is realized.

[0008] In addition, according to the above-mentioned vent plug of the present utility model, the following additional technical features may also be provided:

[0009] Further, the clamping portion is circumferentially provided on the outer circumferential wall of the first connecting portion along the circumferential direction of the first connecting portion.

[0010] Further, the side of the clamping portion facing away from the abutting portion is connected to the outer circumferential wall of the first connecting portion through a guiding surface, and the guiding surface is inclined from the outer circumferential wall of the first connecting portion towards the side of the clamping portion facing away from the abutting portion.

[0011] Further, the clamping portion is made of PA66 plastic material.

[0012] Further, the outer diameter of the abutting portion is greater than the outer diameter of the first connecting portion and the outer diameter of the second connecting portion, and one side of the abutting portion connected to the second connecting portion is in abutment with the end face of the vent pipe, and one side of the abutting portion connected to the first connecting portion is used for abutting against the end face of the gearbox housing.

[0013] Further, the vent plug further includes a sealing member. A receiving groove is provided on the circumference of one end of the first connecting portion close to the abutting portion, and the sealing member is provided in the receiving groove.

[0014] Further, an exhaust passage is provided on the body, the exhaust passage is arranged along the axial direction of the body, and the vent pipe is communicated with the inside of the gearbox housing through the exhaust passage.

[0015] Further, an oil blocking rib is provided on the inner wall of the vent pipe, and the oil blocking rib is arranged along the circumferential direction of the vent pipe;

[0016] One end of the vent pipe away from the body is provided with at least two socket lips, and the socket lips protrude from the circumferential outer wall of the vent pipe.

[0017] Furthermore, the vent plug further includes a dust cap, and the dust cap is sleeved on one end of the vent pipe away from the body.

[0018] Another aspect of the present invention provides a gearbox, which includes a gearbox housing and the above-mentioned vent plug, and the vent plug is installed on the vent hole of the gearbox housing. Description of the Drawings

[0019] Figure 1 is a three-dimensional structure diagram of the vent plug of the present invention;

[0020] Figure 2 is a sectional structure diagram of the vent plug of the present invention when installed on the vent hole of the gearbox housing;

[0021] Figure 3 is Figure 2 an enlarged structure diagram of part A in

[0022] Among them, the above-mentioned drawings include the following reference numerals: 10 - vent plug; 11 - body; 111 - abutting portion; 112 - first connecting portion; 113 - second connecting portion; 114 - clamping portion; 115 - guiding surface; 101 - exhaust passage; 102 - receiving groove; 12 - vent pipe; 121 - oil baffle rib; 122 - socket lip; 13 - seal; 14 - dust cap; 20 - gearbox housing; 201 - vent hole; 202 - clamping groove.

[0023] The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings. Specific Embodiments

[0024] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0025] It should be noted that when an element is referred to as "fixedly provided on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this utility model belongs. The terms used in the description of this utility model herein are for the purpose of describing specific embodiments only and are not intended to limit this utility model. The term "and / or" as used herein includes any and all combinations of one or more of the related listed items.

[0027] Please refer to Figures 1 to 3 , which shows the breather plug 10 of this utility model. The breather plug 10 is used to be installed on the vent hole 201 of the transmission housing 20. The breather plug 10 includes a body 11 and an air pipe 12 provided at one end of the body 11. The body 11 includes an abutting portion 111, a first connecting portion 112 provided on one side of the abutting portion 111, and a second connecting portion 113 provided on the other side of the abutting portion 111. Among them, the first connecting portion 112 is used to connect with the vent hole 201 of the transmission housing 20, and an air pipe 12 is sleeved on the second connecting portion 113. As a specific example, in this embodiment, the outer diameter of the abutting portion 111 is greater than the outer diameters of the first connecting portion 112 and the second connecting portion 113, and the side of the abutting portion 111 connected to the second connecting portion 113 abuts against the end face of the air pipe 12. The side of the abutting portion 111 connected to the first connecting portion 112 is used to abut against the end face of the transmission housing 20. The setting of the abutting portion 111 can effectively prevent the oil in the transmission from penetrating through the gap between the first connecting portion 112 and the vent hole 201 of the transmission housing 20.

[0028] Furthermore, to improve the connection stability between the breather plug 10 and the vent hole 201 of the transmission housing 20, a clamping portion 114 is further provided on the body 11 of the breather plug 10 of this application. The clamping portion 114 is provided at the end of the first connecting portion 112 away from the abutting portion 111. A clamping groove 202 adapted to the clamping portion 114 is provided on the transmission housing 20. The connection between the first connecting portion 112 and the vent hole 201 is realized through the clamping between the clamping portion 114 and the clamping groove 202. As a specific example, in this embodiment, the clamping portion 114 is a circular ring structure, and the inner side of the circular ring structure is integrally connected to the circumferential outer wall of the first connecting portion 112. That is to say, the clamping portion 114 is arranged along the circumference of the first connecting portion 112 on the circumferential outer wall of the first connecting portion 112. Further, the side of the clamping portion 114 facing away from the abutting portion 111 is connected to the circumferential outer wall of the first connecting portion 112 through a guiding surface 115, and the guiding surface 115 is inclined from the circumferential outer wall of the first connecting portion 112 towards the side of the clamping portion 114 facing away from the abutting portion 111.

[0029] Among them, the setting of the guiding surface 115 can guide the inner wall of the vent hole 201 to abut against the lower side surface of the clamping portion 114 during the insertion of the main body 11 into the vent hole 201, so that the portion of the clamping portion 114 protruding from the circumferential outer wall of the first connecting portion 112 can be deformed and reduced under the extrusion force of the inner wall of the vent hole 201, so that the clamping portion 114 can enter the inside of the vent hole 201 together with the first connecting portion 112. When the clamping portion 114 enters the inside of the clamping groove 202, the inner wall of the vent hole 201 no longer extrudes the clamping portion 114, and the clamping portion 114 will automatically stretch and return to its original shape. At this time, the clamping portion 114 is limited in the clamping groove 202, thereby realizing the firm connection between the first connecting portion 112 and the vent hole 201, and effectively avoiding the phenomenon of falling off from the vent hole 201 of the transmission housing 20 due to the reduction of the outer diameter of the vent plug 10, ensuring the normal operation of the transmission.

[0030] It should be noted that, in this embodiment, the material of the clamping portion 114 is PA66 plastic material, which can enable the clamping portion 114 to adaptively deform under the action of external force and automatically stretch and return to its original shape when not affected by external force. It should be understood that the structure and material of the clamping portion 114 in the present invention are not limited to the structure and material in the above embodiment, and can also be other structures and materials that can achieve the purpose of the present invention.

[0031] Furthermore, the vent plug 10 further includes a sealing member 13. An accommodation groove 102 is provided in the circumferential direction at one end of the first connecting portion 112 close to the abutting portion 111. The sealing member 13 is arranged in the accommodation groove 102, and the sealing member 13 is in interference fit with the inner wall of the vent hole 201 to play a sealing role. As a specific example, in this embodiment, the sealing member 13 is an O-ring. By using the O-ring to seal the gap between the first connecting portion 112 and the inner wall of the vent hole 201, it can effectively prevent lubricating oil from penetrating through the gap between the vent hole 201 of the transmission housing 20 and the first connecting portion 112, and further effectively improve the lubrication effect and operation efficiency of the transmission.

[0032] Furthermore, an exhaust passage 101 is provided on the main body 11. The exhaust passage 101 is arranged along the axial direction of the main body 11. The ventilation pipe 12 is communicated with the inside of the transmission housing 20 through the exhaust passage 101 to realize the ventilation function of the vent plug 10.

[0033] Further, an oil baffle rib 121 is provided on the inner wall of the vent pipe 12, and the oil baffle rib 121 is arranged along the circumferential direction of the vent pipe 12. As a specific example, in this embodiment, the oil baffle rib 121 is a circular ring structure, and the outer side of the circular ring structure is integrally connected to the circumferential inner wall of the vent pipe 12. During actual use, when the lubricating oil forms a splashing oil belt through the rotation of the gear and enters the pipe of the vent pipe 12 through the exhaust passage 101 on the main body 11 to form an oil flow, at this time, the setting of the oil baffle rib 121 will greatly reduce the impact force of the oil flow. The oil flow located inside the pipe of the vent pipe 12 is buffered under the partitioning action of the oil baffle rib 121, and can initially play a role in preventing the lubricating oil from flowing out of the outside of the gearbox and polluting the environment.

[0034] Further, at least two socket lips 122 are provided at one end of the vent pipe 12 away from the main body 11. The socket lips 122 protrude from the circumferential outer wall of the vent pipe 12. The socket lips 122 are used to abut against the inner wall of the dust cap 14 to improve the connection stability between the dust cap 14 and the vent pipe 12 and prevent the dust cap 14 from falling off. In addition, the setting of the socket lips 122 can also play a role in blocking the oil from flowing out through the gap between the inner wall of the dust cap and the outer wall of the vent pipe.

[0035] Further, the vent plug 10 further includes a dust cap 14. The dust cap 14 is sleeved on one end of the vent pipe 12 away from the main body 11. The setting of the dust cap 14 can play a role in blocking impurities such as dust and water in the outside atmosphere from entering the inside of the vent pipe 12 and polluting the oil while ensuring the ventilation between the gearbox and the outside.

[0036] In summary, the beneficial effects of the vent plug of the present utility model are as follows: Through the vent plug provided by the present utility model, the phenomenon of falling off from the vent hole of the gearbox housing due to the reduction of the outer diameter of the vent plug can be effectively avoided, the connection stability between the vent plug and the vent hole of the gearbox housing and the service life of the vent plug are improved, and the normal operation of the gearbox is ensured. Specifically, the vent plug includes a main body and a vent pipe provided at one end of the main body. The main body includes an abutting portion, a first connecting portion provided on one side of the abutting portion, and a second connecting portion provided on the other side of the abutting portion. A clamping portion is provided on the main body, and the clamping portion is provided at one end of the first connecting portion away from the abutting portion. A clamping groove adapted to the clamping portion is provided on the gearbox housing. During actual use, the firm connection between the first connecting portion and the vent hole is realized through the clamping between the clamping portion and the clamping groove, and thus the reliable installation of the vent plug on the vent hole of the gearbox housing is realized.

[0037] On the other hand, the present utility model provides a gearbox, which includes a gearbox housing 20 and the above-mentioned vent plug 10, and the vent plug is installed on the vent hole 201 of the gearbox housing 20.

[0038] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0039] The above-described embodiments only express several implementation manners of the present utility model. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present utility model application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the present utility model application shall be subject to the appended claims.

Claims

1. A breather plug for installation on a vent hole of a transmission housing, the breather plug comprising a body and an air pipe provided at one end of the body, characterized in that, The main body includes an abutting portion, a first connecting portion provided on one side of the abutting portion, and a second connecting portion provided on the other side of the abutting portion, and the vent pipe is sleeved on the second connecting portion; The main body is also provided with a clamping portion, which is arranged at one end of the first connecting portion away from the abutting portion. The gearbox housing is provided with a clamping groove adapted to the clamping portion, and the connection between the first connecting portion and the vent is achieved by clamping the clamping portion and the clamping groove.

2. The vent plug according to claim 1, characterized in that, The clamping portion is arranged on a circumferential outer wall of the first connecting portion along the circumference of the first connecting portion.

3. The breather plug according to claim 2, characterized in that, The side of the clamping portion away from the abutting portion is connected to the circumferential outer wall of the first connecting portion through a guide surface, and the guide surface is inclined from the circumferential outer wall of the first connecting portion toward the side of the clamping portion away from the abutting portion.

4. The breather plug according to claim 3, wherein, The clamping part is made of PA66 plastic material.

5. The vent plug according to claim 1, characterized in that, The outer diameter of the abutment portion is larger than the outer diameter of the first connection portion and the outer diameter of the second connection portion, and the side of the abutment portion connected to the second connection portion abuts against the end face of the ventilation pipe, and the side of the abutment portion connected to the first connection portion is used to abut against the end face of the gearbox housing.

6. The vent plug according to claim 1, characterized in that, The vent plug further includes a sealing member, and an accommodating groove is circumferentially provided at one end of the first connecting portion close to the abutting portion, and the sealing member is disposed in the accommodating groove.

7. The breather plug according to claim 1, characterized in that, The main body is provided with an exhaust passage, the exhaust passage is arranged along the axial direction of the main body, and the vent pipe is communicated with the interior of the gearbox housing through the exhaust passage.

8. The breather plug according to claim 1, characterized in that, The inner wall of the vent pipe is provided with an oil retaining rib, and the oil retaining rib is arranged along the circumference of the vent pipe; At least two sleeve lips are arranged at one end of the vent pipe away from the main body, and the sleeve lips are arranged to protrude from the circumferential outer wall of the vent pipe.

9. The breather plug according to claim 1, wherein, The vent plug also includes a dust cap, which is sleeved on an end of the vent pipe away from the body.

10. A transmission, characterized in that, The gearbox comprises a gearbox housing and a vent plug according to any one of claims 1 to 9, wherein the vent plug is mounted on a vent hole of the gearbox housing.

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