CN213176733U

CN213176733U - Labyrinth type ventilation structure of transmission system box body

Info

Publication number: CN213176733U
Application number: CN202021756694.9U
Authority: CN
Inventors: 孙利锋; 周文武; 张慧; 胡晓华
Original assignee: Zhejiang PanGood Power Technology Co Ltd
Current assignee: Zhejiang PanGood Power Technology Co Ltd
Priority date: 2020-08-20
Filing date: 2020-08-20
Publication date: 2021-05-11
Anticipated expiration: 2030-08-20

Abstract

The utility model belongs to the technical field of the transmission case, especially, relate to a transmission system box labyrinth ventilation structure. The utility model discloses to lubricating oil pile up near the stopper of ventilating among the prior art, when opening the stopper of ventilating, lubricating oil can be along with the process spun problem of ventilating, provides a transmission system box labyrinth ventilation structure, including first casing and second casing, still be equipped with the air vent that is linked together with the transmission cavity on first casing and/or the second casing, the air vent is linked together with the transmission cavity through ventilation structure, the one end that ventilation structure is close to the air vent is equipped with the gas outlet, and the one end that ventilation structure is close to the transmission cavity is equipped with the air inlet, connects gradually air inlet, gas outlet and air vent with the line segment and obtains a broken line. The utility model discloses be equipped with the ventilation structure that the route of ventilating was buckled between transmission cavity and air vent, simple and convenient realization can prevent the effect that lubricating oil spilled over again when guaranteeing to ventilate.

Description

Labyrinth type ventilation structure of transmission system box body

Technical Field

The utility model belongs to the technical field of the transmission case, especially, relate to a transmission system box labyrinth ventilation structure.

Background

In the transmission process of the transmission system, energy loss exists, and part of energy is converted into heat energy; because of expansion with heat and contraction with cold, the pressure in the box body is continuously increased, so a vent plug is needed to be arranged for internal decompression. Lubricating oil in the box body flows away along the four positions in the box body under the rotating action of the transmission gear; if the lubricating oil is accumulated near the vent plug, the lubricating oil can be sprayed out along with the ventilation process when the vent plug is opened. Therefore, a ventilation structure is needed to ensure that the lubricant cannot reach the vicinity of the ventilation plug, so as to prevent oil leakage during ventilation.

For example, the chinese utility model discloses a reduction gear device [ application number: 201520362440.1], the utility model comprises a primary transmission component, a box cover, a box bottom, a secondary transmission component, a bolt and a fuel indicator display device; one side of the speed reducer is provided with a first elastic washer and a sealing gasket, the first elastic washer is positioned above the sealing gasket, an oil indicator display device is arranged between the first elastic washer and the sealing gasket, and the other side of the speed reducer is provided with a conical pin; the lower end of the speed reducer is provided with a box bottom, the upper end of the speed reducer is provided with a box cover, the upper end of the box cover is provided with a sight hole cover and a vent plug, the sight hole cover is positioned on one side close to the elastic washer I, and the vent plug is positioned on one side close to the taper pin; be provided with one-level transmission assembly and second grade transmission assembly in the gear box, the axle center of one-level transmission assembly and second grade transmission assembly is located same axis line, the axle center and the taper pin of one-level transmission assembly and second grade transmission assembly are located same water flat line, one-level transmission assembly and second grade transmission assembly all are provided with the bolt, the even distribution of bolt is on one-level transmission assembly and second grade transmission assembly, one-level transmission assembly and second grade transmission assembly adopt the transmission mode of meshing.

The utility model discloses a have and to provide more powerful output torque, the advantage that makes the low speed ratio of reducing gear box can improve, but it still does not solve above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned problem, a transmission system box labyrinth ventilation structure who simply conveniently realizes preventing the lubricating oil leak is provided.

In order to achieve the above purpose, the utility model adopts the following technical proposal:

a labyrinth type ventilation structure of a transmission system box body comprises a first shell and a second shell, wherein the first shell and the second shell can be oppositely matched and enclosed to form a transmission cavity, an input shaft assembly mounting hole for mounting an input shaft and an output shaft assembly mounting hole for mounting an output shaft are arranged at corresponding positions of the first shell and the second shell, the input shaft assembly mounting hole and the output shaft assembly mounting hole are communicated with the transmission cavity, a vent hole communicated with the transmission cavity is further formed in the first shell and/or the second shell, the vent hole is communicated with the transmission cavity through the ventilation structure, an air outlet is formed in one end, close to the vent hole, of the ventilation structure, an air inlet is formed in one end, close to the transmission cavity, of the ventilation structure, and the air inlet, the air outlet and the vent hole are sequentially connected through line segments to obtain a broken line.

In the labyrinth type ventilation structure of the transmission system box body, the ventilation structure comprises a plurality of ventilation cavities which are sequentially communicated, the ventilation cavity close to one end of the transmission cavity is communicated with the air inlet, the ventilation cavity close to one end of the ventilation hole is communicated with the air outlet, and a separation structure is arranged between every two adjacent ventilation cavities.

In the labyrinth ventilation structure of the transmission system box, the air inlet comprises at least one inclined side surface, and an included angle between the inclined side surface and the rotating direction of the output shaft in the positive rotation is an acute angle.

In the labyrinth type ventilation structure of the transmission system box, the top end of the separation structure protrudes out of the bottom surface of the ventilation cavity.

In the labyrinth type ventilation structure of the transmission system box body, the side surface of at least one ventilation cavity is communicated with an auxiliary ventilation cavity, and the auxiliary ventilation cavity is communicated with the transmission cavity through a communication port.

In the labyrinth ventilation structure of the transmission system box, the ventilation structure further comprises a first baffle plate protruding out of the inner surface of the first shell, and the air inlet is positioned on the upper end surface of the first baffle plate and is recessed downwards.

In the labyrinth ventilation structure of the transmission system box, the height of the first baffle is L1, the depth of the air inlet is L2, and L1 is more than 3 times of L2.

In the labyrinth ventilation structure of the transmission system box, the ventilation structure further comprises a second baffle plate protruding out of the inner surface of the second shell, and when the first shell and the second shell are oppositely matched, the upper end surface of the second baffle plate is attached to the upper end surface of the first baffle plate.

Compared with the prior art, the utility model has the advantages of:

1. the utility model discloses be equipped with the ventilation structure that the route of ventilating was buckled between transmission cavity and air vent, simple and convenient realization can prevent the effect that lubricating oil spilled over again when guaranteeing to ventilate.

2. The utility model discloses simple structure, it is less to original structural change, easily production or to the repacking of upgrading of original product, manufacturing cost is lower.

Drawings

FIG. 1 is a schematic structural view of a first housing;

FIG. 2 is an enlarged view at A in FIG. 1;

FIG. 3 is a front view of the first housing;

FIG. 4 is a schematic structural view of the second housing;

in the figure: the device comprises a first shell 1, a second shell 2, a transmission cavity 3, an input shaft assembly mounting hole 4, an output shaft assembly mounting hole 5, a vent hole 6, a ventilation structure 7, an air outlet 8, an air inlet 9, a ventilation cavity 71, a separation structure 72, an auxiliary ventilation cavity 73, a communication port 74, a first baffle plate 75, a second baffle plate 76 and an inclined side surface 91.

Detailed Description

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

Referring to fig. 1 and 4, a labyrinth type ventilation structure for a transmission system box includes a first housing 1 and a second housing 2, where the first housing 1 and the second housing 2 may be oppositely fitted and enclose a transmission cavity 3, an input shaft assembly mounting hole 4 for mounting an input shaft and an output shaft assembly mounting hole 5 for mounting an output shaft are provided at corresponding positions of the first housing 1 and the second housing 2, the input shaft assembly mounting hole 4 and the output shaft assembly mounting hole 5 are both communicated with the transmission cavity 3, a vent hole 6 communicated with the transmission cavity 3 is further provided on the first housing 1 and/or the second housing 2, a vent plug may be plugged into the vent hole 6, and when ventilation is required, the vent plug may be pulled out to discharge redundant gas in the transmission cavity 3 through the vent hole 6. The vent hole 6 is communicated with the transmission cavity 3 through a vent structure 7, an air outlet 8 is arranged at one end, close to the vent hole 6, of the vent structure 7, an air inlet 9 is arranged at one end, close to the transmission cavity 3, of the vent structure 7, and a broken line is obtained by sequentially connecting the air inlet 9, the air outlet 8 and the vent hole 6 through line segments. That is, the air inlet 9, the air outlet 8 and the vent hole 6 are not on the same straight line, so that the formed vent path is a bent path, the bent path has small influence on the flow of air, and can generate large resistance on the flow of viscous liquid such as lubricating oil, so as to prevent the lubricating oil from leaking out in the air leakage process.

The utility model discloses, during the use, input shaft and output shaft take place to rotate to drive the lubricating oil in the transmission cavity 3 and take place to flow, when needing to ventilate, extract the stopper of ventilating in the air vent 6, the gas in the transmission cavity 3 loops through and connects inlet 9, ventilation structure 7 gas outlet 8 and air vent 6 and discharges. The event the utility model discloses be equipped with the ventilation structure that the route of ventilating was buckled between transmission cavity 3 and air vent 6, simple and convenient realization can prevent the effect that lubricating oil spills over again when guaranteeing to ventilate.

Referring to fig. 2 and 3, the ventilation structure 7 includes a plurality of ventilation cavities 71 sequentially connected, the ventilation cavity 71 near one end of the transmission cavity 3 is connected to the air inlet 9, the ventilation cavity 71 near one end of the ventilation hole 6 is connected to the air outlet 8, and a separation structure 72 is disposed between two adjacent ventilation cavities 71.

Preferably, the air inlet 9 includes at least one inclined side surface 91, and an included angle between the inclined side surface 91 and a rotation direction of the output shaft in the normal rotation is an acute angle. The forward rotation direction of the output shaft is the rotation direction of the output shaft when the vehicle is driven to run forwards, and the reverse rotation direction of the output shaft when the vehicle is reversed. Therefore, in the actual use process, the forward rotation speed of the output shaft is much higher than the reverse rotation speed, so the moving speed of the lubricating oil driven by the forward rotation is higher. The included angle between the inclined side surface 91 and the rotating direction of the output shaft in the forward rotation is an acute angle, so that the lubricating oil can be greatly prevented from entering the ventilation structure 7 through the air inlet 9 in the forward rotation of the output shaft, and the lubricating oil has a small moving speed and is also not easy to enter the ventilation structure 7 through the air inlet 9 in the reverse rotation of the output shaft.

Preferably, the top end of the partition structure 72 protrudes from the bottom surface of the vent cavity 71. The ventilation structure 7 is separated by the separation structure 72 to form a plurality of ventilation cavities 71, and the separation structure 72 protrudes out of the bottom surface of the ventilation cavity 71, that is, a separation baffle is arranged between two adjacent ventilation cavities 71, so that the oil falls out in the height direction, and the lubricating oil is further ensured not to be easy to leak.

As shown in fig. 2, the side surface of at least one ventilation cavity 71 is communicated with an auxiliary ventilation cavity 73, and the auxiliary ventilation cavity 73 is communicated with the transmission cavity 3 through a communication port 74. At least one venting cavity 71 is laterally connected to the auxiliary venting cavity 73, so that the venting rate can be increased while ensuring the flexibility of the overall flow path of the venting structure 7.

As shown in fig. 1, the ventilating structure 7 further includes a first baffle 75 protruding from the inner surface of the first casing 1, and the air inlet 9 is located on the upper end surface of the first baffle 75 and is recessed downward. Therefore, a certain height difference is formed between the whole ventilating structure 7 and the movement position of the lubricating oil in the transmission cavity 3, and the performance of preventing the lubricating oil from leaking by the ventilating structure 7 is ensured. Referring to fig. 4, the ventilation structure 7 further includes a second baffle plate 76 protruding from the inner surface of the second casing 2, and when the first casing 1 and the second casing 2 are fitted to each other, the upper end surface of the second baffle plate 76 is attached to the upper end surface of the first baffle plate 75. After the upper end surface of the second baffle 76 is attached to the upper end surface of the first baffle 75, both gas and lubricating oil can enter the ventilation structure 7 only through the gas inlet 9, and the lubricating oil is prevented from directly splashing into the ventilation structure 7 in the operation process.

Preferably, the height of the first baffle 75 is L1, the depth of the air inlet 9 is L2, and L1 is more than 3 times of L2. Therefore, the air permeability and the performance of preventing the lubricating oil from leaking can be better considered.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms of the first housing 1, the second housing 2, the transmission cavity 3, the input shaft assembly mounting hole 4, the output shaft assembly mounting hole 5, the vent hole 6, the vent structure 7, the air outlet 8, the air inlet 9, the vent cavity 71, the partition structure 72, the auxiliary vent cavity 73, the communication port 74, the first baffle plate 75, the second baffle plate 76, the inclined side 91, and the like are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. The utility model provides a transmission system box labyrinth ventilation structure, includes first casing (1) and second casing (2), but first casing (1) and second casing (2) relative position cooperation and enclose and close and form transmission cavity (3), the corresponding position of first casing (1) and second casing (2) is provided with input shaft assembly mounting hole (4) that are used for installing the input shaft and is used for installing output shaft assembly mounting hole (5), input shaft assembly mounting hole (4) and output shaft assembly mounting hole (5) all are linked together with transmission cavity (3), its characterized in that: still be equipped with on first casing (1) and/or second casing (2) air vent (6) that are linked together with transmission cavity (3), air vent (6) are linked together through ventilation structure (7) and transmission cavity (3), the one end that ventilation structure (7) is close to air vent (6) is equipped with gas outlet (8), and the one end that ventilation structure (7) is close to transmission cavity (3) is equipped with air inlet (9), connects gradually air inlet (9), gas outlet (8) and air vent (6) with the line segment and obtains a broken line.

2. The driveline case labyrinth venting structure as recited in claim 1, wherein: the ventilation structure (7) comprises a plurality of ventilation cavities (71) which are sequentially communicated, the ventilation cavity (71) close to one end of the transmission cavity (3) is communicated with the air inlet (9), the ventilation cavity (71) close to one end of the ventilation hole (6) is communicated with the air outlet (8), and a separation structure (72) is arranged between every two adjacent ventilation cavities (71).

3. The driveline case labyrinth venting structure as recited in claim 2, wherein: the air inlet (9) comprises at least one inclined side surface (91), and an included angle between the inclined side surface (91) and the rotating direction of the output shaft in the positive rotation is an acute angle.

4. The driveline case labyrinth venting structure as recited in claim 2, wherein: the top end of the separation structure (72) protrudes out of the bottom surface of the ventilation cavity (71).

5. The driveline case labyrinth venting structure as recited in claim 2, wherein: the side surface of at least one ventilation cavity (71) is communicated with an auxiliary ventilation cavity (73), and the auxiliary ventilation cavity (73) is communicated with the transmission cavity (3) through a communication opening (74).

6. The driveline case labyrinth venting structure as recited in claim 2, wherein: the ventilation structure (7) further comprises a first baffle plate (75) protruding out of the inner surface of the first shell (1), and the air inlet (9) is located on the upper end surface of the first baffle plate (75) and is recessed downwards.

7. The driveline case labyrinth venting structure of claim 6, wherein: the height of the first baffle plate (75) is L1, the depth of the air inlet (9) is L2, and L1 is more than 3 times of L2.

8. The driveline case labyrinth venting structure of claim 6, wherein: the ventilation structure (7) further comprises a second baffle plate (76) protruding out of the inner surface of the second shell (2), and when the first shell (1) and the second shell (2) are oppositely matched, the upper end surface of the second baffle plate (76) is attached to the upper end surface of the first baffle plate (75).