CN219317558U

CN219317558U - Transmission case

Info

Publication number: CN219317558U
Application number: CN202320856926.5U
Authority: CN
Inventors: 董勇; 郭卫杰; 李建文; 刘学建
Original assignee: Jing Jin Electric Technologies Beijing Co Ltd
Current assignee: Jing Jin Electric Technologies Beijing Co Ltd
Priority date: 2023-04-17
Filing date: 2023-04-17
Publication date: 2023-07-07
Anticipated expiration: 2033-04-17

Abstract

The utility model discloses a gearbox body, which comprises a box body main body and a labyrinth structure; the top end of the box body is provided with a vent, the labyrinth structure is arranged on the box body, one end of the labyrinth structure is communicated with the vent, and the other end of the labyrinth structure is communicated with the inside of the box body; through direct processing box main part formation labyrinth structure, labyrinth structure's one end and air vent intercommunication, labyrinth structure's the other end and box main part intercommunication, the lubricating oil in the box main part need just can reach the air vent through labyrinth structure like this, has promoted the excessive degree of difficulty of lubricating oil to realized blockking to lubricating oil, and form labyrinth structure through processing box main part, can reduce the space that occupies the inside of derailleur box, thereby can control the overall dimension of derailleur box, reduce the requirement of derailleur box to installation space. Meanwhile, the labyrinth structure can ensure the communication between the inside of the gearbox body and the outside of the gearbox body, so as to achieve the technical effect of regulating air pressure.

Description

Transmission case

Technical Field

The utility model belongs to the technical field of speed variators, and particularly relates to a speed variators box body.

Background

For lubrication and cooling of gears and bearings in a transmission, it is necessary to store lubricating oil in the transmission case. In the process of high-speed rotation of the gear, for example, when the speed is 16000r/min-18000r/min, lubricating oil can splash along with the rotation of the gear, and as the vent hole for relieving the pressure difference between the inside and the outside of the transmission case is arranged above the transmission case, the lubricating oil can be discharged to the outside of the transmission case through the vent hole. This not only contaminates the outer surface of the transmission housing, but also contaminates the space around the transmission housing.

The existing transmission is provided with a special decompression and oil leakage prevention structure at the position of the vent hole, such as a decompression structure in a transmission shell with the publication number of CN204083161U, and the decompression structure can be used for balancing the air pressure difference between the inside of the transmission and the outside of the transmission, and can avoid the occurrence of outward oil leakage of lubricating oil. However, the pressure reducing structure needs to occupy space outside the transmission case, and when the installation space outside the transmission is limited, the pressure reducing structure cannot be installed.

Meanwhile, the pressure reducing structure consists of a plurality of parts such as a sleeve, a pressing plate and a spring, and when one of the parts fails, the pressure reducing structure cannot work normally, so that lubricating oil in a gearbox body overflows the gearbox to cause pollution.

Disclosure of Invention

In view of the above, the present utility model discloses a transmission case to overcome or at least partially solve the above-described problems.

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

a transmission case comprising a case body and a labyrinth structure; the top of box main part is equipped with the air vent, labyrinth structure sets up on the box main part, labyrinth structure's one end with the air vent intercommunication, labyrinth structure's the other end with the inside intercommunication of box main part is in order to increase the inside lubricating oil's of box main part overflow route.

Optionally, the labyrinth structure comprises a first oil baffle cavity; the length direction of the first oil blocking cavity is along the thickness direction of the box body, the first end of the first oil blocking cavity along the length direction of the first oil blocking cavity is provided with an air inlet oil blocking port, and the air inlet oil blocking port is communicated with the inside of the box body; the first oil blocking cavity is provided with a first-stage oil blocking port along the second end of the first oil blocking cavity in the length direction, and the first-stage oil blocking port is communicated with the air vent.

Optionally, the air inlet oil blocking port is horizontally communicated with the inside of the box body.

Optionally, the bottom surface of the first oil blocking cavity is arranged in a downward inclined mode along the direction of the air inlet oil blocking port.

Optionally, the first-stage oil blocking port is arranged at the top of the first oil blocking cavity.

Optionally, the labyrinth structure further comprises a second oil blocking cavity; the second oil blocking cavity is positioned above the first oil blocking cavity; the first end of the second oil blocking cavity along the length direction of the second oil blocking cavity is communicated with the first oil blocking cavity through the first-stage oil blocking port; the top of the second end of the second oil blocking cavity along the length direction of the second oil blocking cavity is provided with a second-stage oil blocking port, and the second-stage oil blocking port is communicated with the air vent.

Optionally, a short rib is arranged in the second oil blocking cavity, and the short rib is positioned in the second oil blocking port and connected with the first inner wall of the second oil blocking cavity.

Optionally, the labyrinth structure further comprises a third oil baffle cavity; the third oil retaining cavity is positioned above the second oil retaining cavity, the third oil retaining cavity is communicated with the second oil retaining cavity through the second-stage oil retaining port, and the third oil retaining cavity is communicated with the air vent;

the third oil retaining cavity is internally provided with an auxiliary baffle rib, the auxiliary baffle rib is positioned above the second-stage oil retaining port and covers the second-stage oil retaining port, and the auxiliary baffle rib is connected with the first inner wall of the third oil retaining cavity and is arranged at intervals with the second inner wall of the third oil retaining cavity so as to form communication with the air vent.

Optionally, the auxiliary rib that keeps off is equipped with a plurality ofly, and is a plurality of auxiliary rib that keeps off is followed the direction of height of box main part is arranged and the interval sets up, and is adjacent auxiliary rib that keeps off is crisscross to be set up the first inner wall of third oil retaining chamber with on the second inner wall of third oil retaining chamber.

Optionally, one end of the auxiliary blocking rib is connected with the box body, and the other end of the auxiliary blocking rib is arranged in a downward inclined mode.

The utility model has the advantages and beneficial effects that:

in the gearbox body, the labyrinth structure is formed by directly processing the box body, one end of the labyrinth structure is communicated with the air vent, and the other end of the labyrinth structure is communicated with the box body, so that lubricating oil in the box body can reach the air vent only through the labyrinth structure, the overflow path of the lubricating oil in the box body is increased, the difficulty of lubricating oil overflow is improved, the blocking of the lubricating oil is realized, and the labyrinth structure is formed by processing the box body, so that the occupied space in the gearbox body can be reduced, the external dimension of the gearbox body can be controlled, and the requirement of the gearbox body on the installation space is reduced. Meanwhile, the labyrinth structure can ensure the communication between the inside of the gearbox body and the outside of the gearbox body, so as to achieve the technical effect of regulating air pressure.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

FIG. 1 is a partial schematic view of a transmission case of the present embodiment;

FIG. 2 is a cross-sectional view taken along the direction A-A in FIG. 1;

FIG. 3 is a radial cross-sectional view of FIG. 1;

fig. 4 is a cross-sectional view taken along the direction B-B in fig. 3.

Detailed Description

In order to make the objects, technical solutions and effects of the present utility model more clear, the technical solutions of the present utility model will be clearly and completely described below with reference to specific embodiments of the present utility model and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The following describes in detail the technical solutions provided by the embodiments of the present utility model with reference to the accompanying drawings.

As shown in fig. 1 to 4, the present embodiment discloses a transmission case including a case body 1 and a labyrinth structure 2. The top of box main part 1 is equipped with air vent 11, and labyrinth structure 2 sets up on box main part 1, forms labyrinth structure 2 through processing box main part 1 promptly, and labyrinth structure 2's one end and air vent 11 intercommunication, labyrinth structure 2's the other end and box main part 1's inside intercommunication can increase the path length that lubricating oil flowed to the air vent and turn to the requirement through the labyrinth structure, promotes the degree of difficulty that lubricating oil of box main part inside overflows to reach the technological effect that blocks lubricating oil.

In the gearbox box of this embodiment, form labyrinth structure through direct processing box main part, labyrinth structure's one end and air vent intercommunication, labyrinth structure's the other end and box main part intercommunication, the lubricating oil in the box main part needs just can reach the air vent through labyrinth structure like this, has increased the excessive route of the inside lubricating oil of box main part, has promoted the degree of difficulty of lubricating oil excessive to realized blockking lubricating oil, and form labyrinth structure through processing box main part, can reduce the inside space of occupation gearbox box, thereby can control the overall dimension of gearbox box, reduce the requirement of gearbox box to installation space. Meanwhile, the labyrinth structure can ensure the communication between the inside of the gearbox body and the outside of the gearbox body, so as to achieve the technical effect of regulating air pressure.

Meanwhile, the labyrinth structure formed by directly processing the box body does not need to be provided with other parts, so that the simplicity of the structure is improved, and the pollution to lubricating oil caused by the fact that the damage of the additionally arranged parts influences the normal operation of the labyrinth structure and the relative movement between the parts generates abrasion is avoided.

Preferably, the vent hole is also provided with a ventilation plug to prevent external moisture and dust from entering the gearbox body, so that the normal operation of the gearbox is ensured.

As shown in connection with fig. 2 and 3, in the present embodiment, the labyrinth structure 2 includes a first oil baffle chamber 21. The length direction of the first oil blocking cavity 21 is set along the thickness direction of the box body 1, that is, along the horizontal direction shown in fig. 2, and the first end of the first oil blocking cavity 21 along its own length direction (that is, the left end of the first oil blocking cavity in fig. 2) is provided with an air inlet oil blocking port 211, and the air inlet oil blocking port 211 is communicated with the inside of the box body 1. The second end of the first oil baffle cavity 21 along the length direction thereof (i.e. the right end of the first oil baffle cavity in fig. 2) is provided with a first-stage oil baffle port 221, and the first oil baffle cavity 21 is communicated with the air vent 11 through the first-stage oil baffle port 221.

Specifically, the gear in the transmission throws lubricating oil into the inner wall of the first oil blocking cavity 21, blocking of a lubricating oil overflow path can be achieved, and the lubricating oil entering the air inlet oil blocking cavity 211 needs to flow along the length direction of the first oil blocking cavity 21 to reach the position of the first oil blocking cavity 221 through the air inlet oil blocking cavity 211 and the first oil blocking cavity 221 respectively arranged at two ends of the first oil blocking cavity 21, so that the lubricating oil overflow difficulty is improved, and the effect of blocking the lubricating oil can be further achieved.

In the process, the lubricating oil in the first oil blocking cavity can directly flow back to the inside of the box body through the air inlet oil blocking port, so that blocking of part of lubricating oil is realized.

As shown in fig. 2, the air intake port 211 is preferably horizontally connected to the inside of the casing body 1. Thus, the lubricating oil with upward trend movement is blocked on the inner wall of the box body 1 and falls back, the difficulty of the lubricating oil entering the air inlet oil blocking port 211 is increased, the blocking of the lubricating oil is realized, and the technical effect of blocking part of the lubricating oil from the root can be achieved.

Preferably, the bottom surface of the first oil blocking cavity 21 is arranged in a downward inclined manner along the direction of the air inlet oil blocking port 211, so that the speed of the lubricating oil in the first oil blocking cavity flowing back to the inside of the box body can be improved, and the technical effect of the first oil blocking cavity on the blocking amount of the lubricating oil is improved.

Further, as shown in connection with fig. 2, in this embodiment, the first-stage oil blocking opening 221 is disposed at the top of the first oil blocking cavity 21, so that the height required to be reached by the liquid level of the lubricating oil can be increased, the difficulty of the lubricating oil passing through the first-stage oil blocking opening 221 is increased, the difficulty of the lubricating oil overflowing is further increased, and the effect of improving the capability of blocking the lubricating oil is achieved.

Of course, in other embodiments, according to the design difference of the first-stage oil blocking port position, the first-stage oil blocking port can be further located on the side face of the first oil blocking cavity, and the first-stage oil blocking port and the second oil blocking cavity are communicated through the communicating pipe, so that the technical effect of improving the difficulty of lubricating oil can be achieved.

Furthermore, in the present embodiment, as shown in conjunction with fig. 2 and 3, the labyrinth structure 2 further includes a second oil blocking chamber 22. The second oil baffle chamber 22 is located above the first oil baffle chamber 21, and a first end of the second oil baffle chamber 22 in its own length direction (i.e., a right end of the second oil baffle chamber in fig. 2) communicates with the first oil baffle chamber 21 through a first-stage oil baffle port 221.

Further, the second oil baffle chamber 22 is provided with a second oil baffle port 220, wherein the second oil baffle port 220 is located at the top of the second end along the length direction of the second oil baffle chamber 22 (i.e. the left end of the second oil baffle chamber in fig. 2), and the second oil baffle port 220 is communicated with the air vent 11. Like this, keep off the hydraulic fluid port 220 and the one-level hydraulic fluid port 221 and be located the both ends of second oil retaining chamber 22 length direction respectively through the second grade for the lubricating oil that is located one-level hydraulic fluid port 221 needs to flow to the position that the second grade kept off the hydraulic fluid port 220 along the length direction of second oil retaining chamber, and the liquid level of lubricating oil is higher than the second grade and keeps off the hydraulic fluid port 220 and just can flow to the position department of air vent 11, can further promote the degree of difficulty that lubricating oil overflows, realizes the technical effect that blocks to lubricating oil.

In this embodiment, as shown in fig. 2 and 4, a short rib 23 is disposed in the second oil blocking cavity, the short rib 23 is located in the second oil blocking port 220, and the short rib 23 is connected with the first inner wall 224 of the second oil blocking cavity.

As shown in fig. 2, specifically, as the amount of the lubricant in the second oil baffle chamber 22 increases, the impact force can be given to the first inner wall 224 of the second oil baffle chamber during the process that the lubricant flows along the length direction of the second oil baffle chamber 22, so that the portion of the lubricant has an upward surge movement tendency. Like this, can block the motion trend of this part lubricating oil through short muscle 23, consume the power of this part lubricating oil and reduce the velocity of flow, avoid lubricating oil to overflow through second grade oil blocking mouth in advance to promote the degree of difficulty that lubricating oil overflowed upwards, realize blockking the technological effect that this part lubricating oil overflowed.

In combination with fig. 2, preferably, in this embodiment, the second oil baffle 220 is not communicated with the first inner wall 224 of the second oil baffle cavity, so that the box body 1 on the left side of the second oil baffle 220 in fig. 2 can be directly used as a short rib, and therefore, no additional short rib is required, and the effect of improving the convenience of setting the labyrinth structure is achieved.

In other embodiments, a plurality of second oil blocking cavities which are communicated in sequence can be arranged according to different levels of blocking of lubricating oil, so that multiple blocking of the lubricating oil can be formed.

As shown in connection with fig. 2 and 3, in this embodiment, the labyrinth structure further includes a third oil baffle chamber 26. The third oil retaining cavity 26 is located above the second oil retaining cavity 22, the third oil retaining cavity 26 is communicated with the second oil retaining cavity 22 through the second-stage oil retaining port 220, the third oil retaining cavity 26 and the vent 11 form a communicating state, and the difficulty of lubricating oil overflow can be further improved through the third oil retaining cavity 26, so that the technical effect of blocking lubricating oil is achieved.

Wherein, as shown in fig. 3, an auxiliary rib 25 is arranged in the third oil blocking cavity 26. The auxiliary baffle rib 25 is located above the second-stage oil baffle port 220, at this time, one end of the auxiliary baffle rib 25 is connected with the first inner wall 261 of the third oil baffle cavity, and the other end of the auxiliary baffle rib 25 is spaced from the second inner wall 262 of the third oil baffle cavity, so as to be communicated with the air vent 11. Thus, the auxiliary blocking rib 25 can block the lubricating oil overflowing the secondary oil blocking port 220, so that the lubricating oil can be blocked in a targeted manner, and the lubricating oil can not reach the position of the air vent.

In this embodiment, as shown in fig. 3, the blocking level can be raised by providing three auxiliary ribs 25, and specifically, the three auxiliary ribs 25 are disposed at intervals along the circumferential direction of the case body 1. Adjacent auxiliary retaining ribs 25 are arranged at two ends of the third retaining oil chamber 26 along the radial direction of the box body 1 in a scale staggered mode, and are specifically arranged on a first inner wall 261 of the third retaining oil chamber and a second inner wall 262 of the third retaining oil chamber respectively.

Wherein, the auxiliary rib that keeps off the top shelters from the air vent, further promotes the degree of difficulty that lubricating oil reached the air vent. Realizing the blocking of lubricating oil.

In other embodiments, the number of the auxiliary ribs may be adjusted according to different blocking levels.

Further, as shown in fig. 3, in this embodiment, one end of the auxiliary blocking rib 25 is connected to the first inner wall 261 of the third oil blocking cavity or the second inner wall 262 of the third oil blocking cavity, and the other end of the auxiliary blocking rib 25 is inclined downward, so that the speed of the lubricating oil moving downward along the auxiliary blocking rib can be increased, and the technical effect of blocking the lubricating oil from overflowing upward is achieved.

Preferably, the downward inclination angle of the auxiliary blocking rib 25 is within the range of 40-50 degrees, so that the influence of the excessively small inclination angle on the inclination of the auxiliary blocking rib can be avoided, and the blocking effect on lubricating oil is reduced. The space required by the auxiliary blocking ribs is increased when the inclination angle of the auxiliary blocking ribs is too large, the number of the auxiliary blocking ribs which can be arranged is reduced, and the blocking level and the blocking effect are affected.

The foregoing is merely a specific embodiment of the utility model and other modifications and variations can be made by those skilled in the art in light of the above teachings. It is to be understood by persons skilled in the art that the foregoing detailed description is provided for the purpose of illustrating the utility model more fully, and that the scope of the utility model is defined by the appended claims.

Claims

1. A transmission housing, characterized in that: comprises a box body and a labyrinth structure; the top of box main part is equipped with the air vent, labyrinth structure sets up on the box main part, labyrinth structure's one end with the air vent intercommunication, labyrinth structure's the other end with the inside intercommunication of box main part is in order to increase the inside lubricating oil's of box main part overflow route.

2. The transmission case according to claim 1, wherein: the labyrinth structure comprises a first oil baffle cavity; the length direction of the first oil blocking cavity is along the thickness direction of the box body, the first end of the first oil blocking cavity along the length direction of the first oil blocking cavity is provided with an air inlet oil blocking port, and the air inlet oil blocking port is communicated with the inside of the box body; the first oil blocking cavity is provided with a first-stage oil blocking port along the second end of the first oil blocking cavity in the length direction, and the first-stage oil blocking port is communicated with the air vent.

3. A transmission housing as claimed in claim 2, wherein: the air inlet oil blocking port is horizontally communicated with the inside of the box body.

4. A transmission housing as claimed in claim 2, wherein: the bottom surface of the first oil blocking cavity is arranged in a downward inclined mode along the direction of the air inlet oil blocking port.

5. A transmission housing as claimed in claim 2, wherein: the first-stage oil blocking port is arranged at the top of the first oil blocking cavity.

6. A transmission housing as claimed in any one of claims 2 to 5, wherein: the labyrinth structure further comprises a second oil blocking cavity; the second oil blocking cavity is positioned above the first oil blocking cavity; the first end of the second oil blocking cavity along the length direction of the second oil blocking cavity is communicated with the first oil blocking cavity through the first-stage oil blocking port; the top of the second end of the second oil blocking cavity along the length direction of the second oil blocking cavity is provided with a second-stage oil blocking port, and the second-stage oil blocking port is communicated with the air vent.

7. The transmission case according to claim 6, wherein: the second oil blocking cavity is internally provided with a short rib, and the short rib is positioned in the second oil blocking port and is connected with the first inner wall of the second oil blocking cavity.

8. The transmission case according to claim 6, wherein: the labyrinth structure further comprises a third oil blocking cavity; the third oil retaining cavity is positioned above the second oil retaining cavity, the third oil retaining cavity is communicated with the second oil retaining cavity through the second-stage oil retaining port, and the third oil retaining cavity is communicated with the air vent;

9. The transmission case according to claim 8, wherein: the auxiliary blocking ribs are arranged in a plurality, are arranged in the height direction of the box body at intervals, and are staggered and arranged on the first inner wall of the third oil blocking cavity and the second inner wall of the third oil blocking cavity.

10. The transmission case according to claim 8, wherein: one end of the auxiliary blocking rib is connected with the box body, and the other end of the auxiliary blocking rib is arranged in a downward inclined mode.