CN211371236U - Pressure relief structure for engine gearbox - Google Patents
Pressure relief structure for engine gearbox Download PDFInfo
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- CN211371236U CN211371236U CN202020108085.6U CN202020108085U CN211371236U CN 211371236 U CN211371236 U CN 211371236U CN 202020108085 U CN202020108085 U CN 202020108085U CN 211371236 U CN211371236 U CN 211371236U
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Abstract
The utility model discloses a pressure relief structure for an engine gearbox, which comprises a main body section and a cover body section which are connected, wherein the main body section and the cover body section are both provided with inner holes which are communicated with each other to form an air vent; a powder metallurgy part is arranged on the vent hole of the main body section, and a plurality of micropores are formed in the powder metallurgy part and can allow gas to pass through; a ventilation dustproof piece is arranged on the ventilation hole at the upper end of the cover body section in a matching way, and the ventilation dustproof piece is provided with a plurality of small ventilation holes; a small dustproof cover is arranged on the ventilation dustproof piece to fix the ventilation dustproof piece; and a lateral air hole is formed between the small dustproof cover and the upper end of the cover body section, or the small dustproof cover is provided with the lateral air hole which is communicated with the air hole through the ventilation dustproof piece. The utility model discloses, utilize powder metallurgy spare and ventilate the inside no several micropore of dust keeper and ventilate a plurality of ventilations apertures on the dust keeper and pass through gas, can let gas pass through naturally, guarantee the balance of outer gas pressure in the gearbox.
Description
Technical Field
The utility model relates to an accessory part of engine gearbox, concretely relates to use engine to provide pressure release structure for engine gearbox of machine, motorcycle, agricultural machine etc. are ploughed a little of power.
Background
Engine gearboxes are mechanisms for varying the speed and torque from the engine, which enable fixed or stepped variation of the output-to-input transmission ratio(ii) a The gear box mainly comprises a variable speed transmission mechanism and an operating mechanism, and the transmission mechanism is multipurpose and commonGear driveAlso using planetsGear driveIn (1). Due to the fact that the gearbox runs, temperature changes are caused, the temperature changes can also be caused by the rotation of a gear in the gearbox and other movements, even the jolt is caused by the forward movement of an appliance, the air pressure of a space above the oil level of the gear can be changed, and therefore the gearbox runs in a disturbing and influencing mode, and the vehicle runs unstably. Therefore, the box cover at the upper part of the gearbox is provided with a vent hole for balancing the internal air pressure and the external air pressure.
The vent holes in prior art transmissions are provided with cooperating covers or a pin or the like that is inserted into the vent holes with a gap between them to allow the ingress or egress of air. However, the matching structure of the pin and the vent hole has an unsatisfactory oil blocking effect, and when the jolt is large or a cutter of the mini-tiller is replaced, oil is often leaked due to inclination, so that the environmental pollution on the ground is caused, and the like.
The applicant of the present patent previously filed a utility model patent entitled "engine gearbox pressure relief device", having application number 201821081275.2, having application number 2018-07-09, reached the balance of outside and inside gas pressure in the gearbox, could prevent rainwater, dust or debris from entering the engine gearbox through the pressure relief device, but in the use process, the applicant found that the dust and debris accumulated on the surface of the powder metallurgy part that is ventilated because of being used in the place where the dust is large, and the dust and debris accumulated for a long time, blocked part of the ventilation holes of the powder metallurgy part, caused the unsmooth exhaust, and made the inside and outside gas pressure of the gearbox unbalanced. In addition, the powder metallurgy parts are also inconvenient to replace.
Disclosure of Invention
To the not enough of above-mentioned prior art, the utility model aims to solve the technical problem that: how to provide a pressure release structure for an engine gearbox, which can not only keep the balance of the pressure of the air inside and outside the gearbox by allowing the air to pass, but also effectively avoid the air vent from being blocked by dust and other sundries.
In order to solve the technical problem, the utility model discloses a following technical scheme:
a pressure relief structure for an engine gearbox comprises a pressure relief device body, wherein the pressure relief device body is connected in an exhaust hole of the engine gearbox when in use; the pressure relief device is characterized in that the pressure relief device body comprises a main body section and a cover body section which are connected, wherein the main body section and the cover body section are both provided with inner holes which are communicated with each other to form a vent hole; a powder metallurgy part is arranged on the vent hole of the main body section, and a plurality of micropores are formed in the powder metallurgy part and can allow gas to pass through; a ventilation dustproof piece is arranged on the ventilation hole at the upper end of the cover body section in a matching way, and the ventilation dustproof piece is provided with a plurality of small ventilation holes; a small dustproof cover is arranged on the ventilation dustproof piece to fix the ventilation dustproof piece; and a lateral air hole is formed between the small dustproof cover and the upper end of the cover body section, or the small dustproof cover is provided with the lateral air hole which is communicated with the air hole through the ventilation dustproof piece.
Therefore, the gas can naturally pass through the powder metallurgy piece by utilizing the infinite micropores in the powder metallurgy piece and the plurality of small ventilation holes on the ventilation dustproof piece, and the balance of the pressure of the gas inside and outside the gearbox is ensured.
Further: the cover body section is arranged on the main body section and is connected with the main body section through threads. Form detachable construction, be convenient for installation and dismantlement.
Further: the ventilating dustproof piece is sponge or filter cotton or a filter element of an air filter used by a motorcycle or an automobile. When the gas can pass through, impurities such as dust can be prevented from reversely entering from the vent hole or accumulating on the surface of the gas, and the gas can be conveniently replaced.
Further: and an access hole is arranged on the small dustproof cover corresponding to the position of the ventilating dustproof piece. Convenient maintenance and timely change dustproof of ventilating.
The geometric dimension of the access hole is larger than that of the ventilation dustproof piece.
The access hole is blocked by a plug, and the plug is opened when in need of use.
Compared with the prior art, the utility model discloses pressure release structure for engine gearbox has following advantage:
1. the utility model discloses a pressure release structure for engine gearbox utilizes the inside no several micropore of powder metallurgy spare to pass through gas, can let gas pass through naturally, guarantees the balance of outer gas pressure in the gearbox.
2. The countless micropores in the powder metallurgy part can allow gas to pass through and effectively isolate oil in the gearbox, so that the oil is prevented from leaking from the pressure relief device.
3. When the jolt is large or the cutter of the mini-tiller and other machines is changed to incline, the oil can be effectively prevented from flowing outwards, and the ground or air is prevented from being polluted.
4. Rainwater, dust or sundries can be prevented from entering the engine gearbox through the pressure relief device, so that the cleanness of oil in the gearbox is kept, and the service life of the engine is prolonged.
5. The ventilation dustproof piece has larger pores, prevents dust or sundries from accumulating on the surface of the ventilated powder metallurgy piece, effectively avoids the ventilation hole from being blocked by the sundries such as the dust and the like, and ensures the balance of the pressure of the air inside and outside the gearbox.
Drawings
Fig. 1 is the schematic view of the pressure relief structure of the present invention.
In the figure: 1-engine gearbox, 2-pressure relief device body, 3-main part section, 4-cover body section, 5-air vent, 6-powder metallurgy piece, 8-air vent dustproof piece, 9-side direction gas pocket, 10-dust-proof small cover, 11-sealing washer, 12-access hole, 13-stopper.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
As shown in fig. 1, the embodiment provides a pressure relief structure for an engine transmission, which includes a pressure relief device body 2, and when in use, the pressure relief device body 2 is connected in an exhaust hole of the engine transmission 1, and an exhaust passage is formed after the pressure relief device body is installed.
The utility model provides a pressure relief device body 2, which comprises a main body section 3 and a cover body section 4 which are connected, wherein the main body section 3 is used for being matched and connected with an exhaust hole of an engine gearbox 1, such as being connected through screw thread or clamping connection, and the specific structure shown in the figure is that the main body section 3 of the pressure relief device body 2 is connected with the exhaust hole of the engine gearbox 1 through screw thread to form a detachable connection structure; a vent hole 5 is formed in the pressure relief device body 2, the vent hole 5 is communicated with an exhaust hole of the engine gearbox 1 during assembly and serves as an air inlet and outlet channel, external air is conveniently introduced inwards or internal air is conveniently discharged out of the engine gearbox, inner holes are formed in the main body section 3 and the cover body section 4, and the vent hole 5 is formed after the inner holes are communicated with each other; a powder metallurgy part 6 is arranged on a vent hole 5 in the pressure relief device body 2, particularly in the main body section 3, the powder metallurgy part 6 is obtained by the existing powder sintering metallurgy mode, and a plurality of micropores are formed in the powder metallurgy part and can pass gas; the shape of the powder metallurgy part 6 is common round, oval, cuboid or cube, and the like, and the material of the powder metallurgy part 6 is copper, stainless steel, aluminum or alloy mixture thereof, and the like; the material of pressure relief device body 2 is nonmetal such as high strength plastic, perhaps suitable metal material, places powder metallurgy spare 6 in the mould of adapted earlier during the preparation, and powder metallurgy spare 6 parcel is in pressure relief device body 2 after the pouring, is located vent 5 moreover. The powder metallurgy part 6 is at least one block, and a plurality of blocks can be arranged according to the requirement.
The cover body section 4 is arranged on the main body section 3 and is connected with the main body section 3 in a matching way, such as through a threaded connection, clamping connection and the like, wherein the threaded connection is shown in the figure; and a sealing ring 11 is arranged between the two parts, so that a good sealing effect is ensured.
In order to prevent rainwater, dust or sundries from entering an engine gearbox through a pressure relief device and keep oil in the gearbox clean, a ventilation dustproof piece 8 is arranged on a ventilation hole 5 at the upper end of a cover body section 4 in a matching mode, the ventilation dustproof piece 8 is provided with a plurality of ventilation holes and is an existing sponge or filter cotton or the like, or a filter core of an air filter used for a motorcycle or an automobile and the like, and the ventilation dustproof piece can prevent the dust and the like from reversely entering the ventilation hole 5 while allowing air to pass through. A small dustproof cover 10 is arranged on the ventilation dustproof piece 8 to fix the ventilation dustproof piece 8; a lateral air hole 9 is formed between the small dustproof cover 10 and the upper end of the cover body section 4, or the small dustproof cover 10 is provided with the lateral air hole 9, and the lateral air hole 9 is communicated with the air hole 5 through the ventilation dustproof piece 8. The pressure relief device body 2 exhausts from the lateral air hole 9 on the side edge, and can prevent rainwater, dust or sundries from entering the engine gearbox through the exhaust hole of the pressure relief device.
On shield 10, the corresponding position of the dust keeper 8 of ventilating sets up manhole 12, just can install and dismantle the dust keeper 8 of ventilating through opening manhole 12, when ventilating dust keeper 8 because of dust accumulation or inefficacy etc. need change, can quick replacement. The manhole 12 is normally blocked by a plug 13, and the plug 13 can be opened to facilitate operation when the manhole is required to be used. The geometric dimension of the access hole 12 is larger than that of the ventilation dustproof piece 8, so that the ventilation dustproof piece 8 can be assembled and disassembled quickly and conveniently.
The main body section 3 of the pressure relief device body 2 is provided with the sealing ring 11, so that a good sealing effect is kept.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and although the applicant has described the present invention in detail with reference to the preferred embodiments, those skilled in the art should understand that those modifications or equivalent substitutions to the technical solutions of the present invention can be made without departing from the spirit and scope of the technical solutions, and all the modifications and equivalent substitutions should be covered by the claims of the present invention.
Claims (7)
1. A pressure relief structure for an engine gearbox comprises a pressure relief device body (2) and is used
The pressure relief device body (2) is connected in an exhaust hole of the engine gearbox (1); the pressure relief device is characterized in that the pressure relief device body (2) comprises a main body section (3) and a cover body section (4) which are connected, wherein the main body section (3) and the cover body section (4) are both provided with inner holes which are communicated with each other to form a vent hole (5); a powder metallurgy part (6) is arranged on the vent hole (5) of the main body section (3), and a plurality of micropores are formed in the powder metallurgy part (6) and can allow gas to pass through; a ventilation and dust-proof piece (8) is arranged on the ventilation hole (5) at the upper end of the cover body section (4) in a matching way, and the ventilation and dust-proof piece (8) is provided with a plurality of small ventilation holes; a small dustproof cover (10) is arranged on the ventilation dustproof piece (8) to fix the ventilation dustproof piece (8); a lateral air hole (9) is formed between the small dustproof cover (10) and the upper end of the cover body section (4), or the small dustproof cover (10) is provided with the lateral air hole (9), and the lateral air hole (9) is communicated with the air hole (5) through the ventilation and dust prevention piece (8).
2. The pressure relief structure for an engine transmission according to claim 1, wherein the cover body segment (4) is provided on the main body segment (3) and is screwed to the main body segment (3).
3. The pressure relief structure for an engine gearbox according to claim 1, characterized in that said ventilation dust-proof member (8) is sponge or filter cotton.
4. The pressure relief structure for an engine gearbox according to claim 1, characterized in that said ventilation dust-proof member (8) is a filter element of an air cleaner used for a motorcycle or an automobile.
5. The pressure relief structure for an engine transmission according to any one of claims 1 to 4, wherein a service hole (12) is provided in the dust cap (10) at a position corresponding to the ventilation dust-proof member (8).
6. The pressure relief structure for an engine transmission according to claim 5, characterized in that the geometrical dimension of said access hole (12) is larger than the geometrical dimension of said ventilation dust-proof member (8).
7. The pressure relief structure for an engine transmission according to claim 5, wherein the access hole (12) is blocked with a plug (13), and the plug (13) is opened when required for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020108085.6U CN211371236U (en) | 2020-01-17 | 2020-01-17 | Pressure relief structure for engine gearbox |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020108085.6U CN211371236U (en) | 2020-01-17 | 2020-01-17 | Pressure relief structure for engine gearbox |
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| Publication Number | Publication Date |
|---|---|
| CN211371236U true CN211371236U (en) | 2020-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020108085.6U Active CN211371236U (en) | 2020-01-17 | 2020-01-17 | Pressure relief structure for engine gearbox |
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| CN (1) | CN211371236U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113719602A (en) * | 2021-07-13 | 2021-11-30 | 东风汽车集团股份有限公司 | Gearbox air breather and gearbox |
| CN114603519A (en) * | 2022-03-21 | 2022-06-10 | 浙江信源电器制造有限公司 | Pressure relief structure |
-
2020
- 2020-01-17 CN CN202020108085.6U patent/CN211371236U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113719602A (en) * | 2021-07-13 | 2021-11-30 | 东风汽车集团股份有限公司 | Gearbox air breather and gearbox |
| CN113719602B (en) * | 2021-07-13 | 2024-01-16 | 东风汽车集团股份有限公司 | Gearbox ventilation device and gearbox |
| CN114603519A (en) * | 2022-03-21 | 2022-06-10 | 浙江信源电器制造有限公司 | Pressure relief structure |
| CN114603519B (en) * | 2022-03-21 | 2024-04-02 | 浙江信源电器制造有限公司 | Pressure relief structure |
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