CN218207710U

CN218207710U - Gearbox body

Info

Publication number: CN218207710U
Application number: CN202222698626.7U
Authority: CN
Inventors: 王卫锋
Original assignee: Jiangsu Fengxin Auto Parts Manufacturing Co ltd
Current assignee: Jiangsu Fengxin Auto Parts Manufacturing Co ltd
Priority date: 2022-10-13
Filing date: 2022-10-13
Publication date: 2023-01-03
Anticipated expiration: 2032-10-13

Abstract

The utility model discloses a gearbox body, which comprises a main box body, wherein the main box body comprises a panel, a back plate and a side plate, the panel, the back plate and the side plate are integrally formed, the lower side of the main box body is an open side, and an input shaft hole, a middle shaft hole and an output half shaft hole are correspondingly arranged on the panel and the back plate from top to bottom; the lower side of the main case is connected to and sealed by a bottom cover. The utility model discloses gearbox casing is the half shaft hole that directly corresponds the position and set up at panel and backplate, need not to divide into about the half shaft hole two parts, and such structural design can avoid half shaft hole installation dislocation to lead to the problem of noise increase. And the bottom cover does not need to bear the pressure of the half shaft hole part, the sealing performance of the connection with the bottom of the main box body is stronger, and the stability is higher.

Description

Gearbox body

Technical Field

The utility model relates to an electric motor car gearbox field especially relates to a gearbox box.

Background

The split type gearbox used in the existing market is mostly of a left-right split structure, a left box body and a right box body are usually clamped and processed respectively in the processing process, the processing precision is easy to be insufficient, the meshing degree between the gears is low after the gears are assembled, and large noise is generated in a high-speed driving state; meanwhile, the box bodies with the left and right structures have large sealing area, and after the box bodies are used for a period of time, the oil leakage phenomenon can occur due to slight deformation, the after-sale maintenance rate is high, and the brand image is influenced.

CN216742724U discloses a mute gearbox body of an electric vehicle, which comprises a main box body and a bottom cover, wherein the main box body comprises a panel, a back plate and side plates, and the lower side of the main box body is an open side; the upper corresponding positions of the panel and the back plate are provided with shaft holes, and the lower corresponding positions of the panel and the back plate are provided with upper arc-shaped notches; the bottom cover comprises a front cover plate, a rear cover plate and a bottom plate, and the upper side of the bottom cover is an open side; lower arc-shaped notches are arranged at the upper sides of the front cover plate and the rear cover and correspond to the upper arc-shaped notches on the panel and the back plate; the main box body is connected with the bottom cover, the upper arc-shaped notches on the panel and the back plate are respectively matched with the lower arc-shaped notches on the front cover plate and the back cover plate to form a circular half shaft hole, and the axial leads of the two half shaft holes are superposed. This patent can improve box machining precision to a certain extent to reduce the high-speed noise of traveling, and reduce the probability of oil impregnate. However, the axle holes on the lower sides of the panel and the back plate are divided into an upper part and a lower part, when the automobile rear panel is installed, the upper part and the lower part are easy to misplace, the installation precision is not high, vibration is easy to generate during working, and the noise is high; in particular, the half shaft holes are stressed, so that the shell is easy to deform when the gearbox works, and the noise is further increased.

SUMMERY OF THE UTILITY MODEL

Not enough to the above-mentioned that prior art exists, the utility model aims to provide a gearbox box solves the easy dislocation of current gearbox box semi-axis hole installation, leads to the great problem of noise.

In order to solve the technical problem, the utility model discloses a technical scheme is like this:

a gearbox body comprises a main box body, wherein the main box body comprises a panel, a back plate and side plates, the panel, the back plate and the side plates are integrally formed, the lower side of the main box body is an open side, and an input shaft hole, a middle shaft hole and an output half shaft hole are correspondingly arranged on the panel and the back plate from top to bottom; the lower side of the main box body is connected with a bottom cover and sealed by the bottom cover, wherein the part of the bottom cover between the panel and the back plate is downwards raised and is arc-shaped to form a differential abdicating groove; and a first sliding groove for mounting a differential is correspondingly arranged between the lower ends of the panel and the back plate and the output half shaft hole, and a second sliding groove for assembling a gear is correspondingly arranged between the output half shaft hole and the middle shaft hole.

Furthermore, the outer side of the main box body is provided with a connecting flange plate, the connecting flange plate is positioned between the middle shaft hole and the output half shaft hole, and the connecting flange plate and the main box body are integrally formed.

Furthermore, the position of the inner side of the bottom cover corresponding to the first sliding groove is a plane, and a differential mechanism supporting boss is formed.

Further, the bottom cover is connected with the lower side of the main box body through a bolt.

Furthermore, a sealing ring which is wound around the lower side of the main box body for one circle is arranged between the bottom cover and the lower end of the main box body.

Furthermore, a lantern ring is formed on the outer side of the panel and corresponds to the input shaft hole and the middle shaft hole and is coaxial with the shaft line; and an output half shaft sleeve is formed on the outer sides of the panel and the back plate and corresponds to the output half shaft hole and is coaxial with the axis.

Furthermore, a motor flange is formed on the upper portion of the back plate of the main box body, and a motor mounting hole is formed in the motor flange.

Furthermore, an oil filling hole and an exhaust hole are arranged at the upper part of the side plate of the main box body, wherein the oil filling hole and the exhaust hole are distributed at two opposite sides of the main box body.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model discloses gearbox housing is the output semi-axis hole that directly sets up at panel and backplate corresponding position, need not to divide into upper and lower two parts with output semi-axis hole, such structural design can avoid causing semi-axis hole dislocation because of machining error etc. to effectively improve gearbox housing's accuracy, and semi-axis hole is better to the supporting effect of semi-axis, can prevent to cause the semi-axis hole to warp because of the effect of semi-axis, and then effective noise reduction, main housing adopts the integrated into one piece structure, the casing is difficult to warp, the durability is also stronger.

2. The utility model discloses the downside of gearbox box is open to seal through the bottom, in this structure, the bottom is not the bearing such as counter shaft, gear, and consequently the leakproofness of being connected with the main tank bottom is stronger, and stability is higher, can effectively prolong gearbox box's whole practical life.

Drawings

FIG. 1 is a schematic structural view of a transmission case of the present invention;

FIG. 2 is a cross-sectional view of the transmission housing of the present invention;

fig. 3 is a schematic view of the bottom structure of the present invention.

In the figure, a main box body 1, an input shaft hole 2, a middle shaft hole 3, an output half shaft hole 4, a bottom cover 5, a connecting flange plate 6, a reinforcing rib 7, a motor flange plate 8, an oil injection hole 9, a differential supporting boss 10, a first sliding groove 11 and a second sliding groove 12.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described with reference to specific examples, but the embodiments of the present invention are not limited thereto.

Example (b): referring to fig. 1, fig. 2, fig. 3, a gearbox casing, includes the main tank body 1, the main tank body 1 includes panel, backplate and curb plate, panel, backplate and curb plate shaping are as an organic whole, and the downside of the main tank body 1 is open side, correspond from last to down on panel and backplate and be equipped with input shaft hole 2, middle shaft hole 3 and half shaft hole 4 of output. Therefore, in the machining process of each shaft hole, machining can be finished after one-time clamping; the accumulated error caused by multiple clamping is avoided, so that the processing precision is greatly improved, the gear engagement degree can be ensured to be more than 95% in batch production, and the noise in the driving process can be stably and greatly reduced. The lower side of the main case 1 is connected to a bottom cover 5 and sealed by the bottom cover 5. Because the binding face between the main box body 1 and the bottom cover 5 is large, the oil leakage risk can be greatly reduced, only the screw connection is adopted, the assembly difficulty is reduced, the assembly error is reduced, and the cost can be effectively reduced.

And a first sliding groove 11 for mounting a differential is correspondingly arranged between the lower ends of the panel and the back plate and the output half shaft hole 4, and a second sliding groove 12 for assembling a gear is correspondingly arranged between the output half shaft hole 4 and the middle shaft hole 3. In this way, the mounting of the differential and the idler gear can be facilitated.

The part of the bottom cover 5 between the panel and the back plate is bulged downwards and is arc-shaped, and a differential abdicating groove is formed; the inner side of the bottom cover 5 corresponding to the first sliding groove is a plane, and a differential supporting boss 10 is formed. Like this, can install differential mechanism in the gearbox box, form "package" structure to can effectively improve the protection effect of gearbox to differential mechanism. In the use process, the differential shell is supported and positioned by a supporting boss of the bottom cover 5, and a half shaft connected with the differential passes through a half shaft hole and then is connected with the main box body or a half shaft sleeve through a bearing so as to further realize the fixation of the differential. The bottom cover 5 is connected with the lower side of the main case 1 by bolts. When needing to maintain, change differential mechanism etc. only need pull down bottom 5, can lift bottom 5 and differential mechanism wholly off to be convenient for differential mechanism's dismouting and maintenance. A sealing ring which surrounds the lower side of the main box body 1 for one circle is arranged between the bottom cover 5 and the lower end of the main box body 1; therefore, the sealing effect of the connecting surface of the main box body 1 and the bottom cover 5 is better, the bottom cover 5 basically does not bear the weight, the sealing performance of the connection with the bottom of the main box body 1 is stronger, and the stability is higher.

The outer side of the main box body 1 is provided with a connecting flange plate 6, the connecting flange plate 6 is positioned between the middle shaft hole 3 and the output half shaft hole 4, and the connecting flange plate 6 and the main box body 1 are integrally formed. The gearbox casing is convenient to install, the connection with the frame is convenient to the whole stability of the casing can be improved, and meanwhile, the noise in use is further reduced.

A lantern ring is formed on the outer side of the panel and corresponds to the input shaft hole 2 and the middle shaft hole 3 and is coaxial with the shaft center; preferably, the collar has an inner diameter corresponding to the inner diameter of the shaft hole, and is used for mounting shafts, bearings, and the like to better support the shaft. And reinforcing ribs 7 are arranged between the lantern ring and the panel or the back plate correspondingly. Wherein, lantern ring and strengthening rib 7 and main tank 1 are through modes such as die-casting integrated into one piece to further improve the stability of whole gearbox. An output half shaft sleeve is formed on the outer sides of the panel and the back plate and corresponds to the output half shaft hole 4 and the same axial lead. By adopting the technical scheme, only the half shaft is required to be installed, and the half shaft sleeve is not required to be independently installed, so that the assembly and the use are more rapid and convenient.

A motor flange 8 is formed on the upper portion of a back plate of the main box body 1, and a motor mounting hole is formed in the motor flange 8. In this way, the installation of the motor is facilitated.

An oil filling hole and an exhaust hole are arranged at the upper part of the side plate of the main box body, wherein the oil filling hole and the exhaust hole are distributed at two opposite sides of the main box body; when in implementation, an oil injection screw plug is arranged in the oil injection hole 9 in a matching way; therefore, the lubricating oil is directly stored in the gearbox and is not stored on a rear axle, so that the possibility of leakage of the lubricating oil is greatly reduced; after the exhaust hole is formed, when the internal pressure is large due to internal temperature rise and the like, the exhaust and pressure relief can be carried out in time, and the damage to the gearbox caused by overlarge pressure in the gearbox body is avoided.

The utility model discloses output half shaft hole 4 is the integrated into one piece structure with panel and backplate, has solved prior art half shaft hole and has divided into upper and lower two parts, appears the installation dislocation easily, and long-term bearing is yielding, causes lubricating oil to reveal, the during operation produces vibrations, leads to technical problem such as noise increase.

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 those skilled in the art should understand that those modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all should be covered in the scope of the claims of the present invention.

Claims

1. A gearbox body comprises a main box body, wherein the main box body comprises a panel, a back plate and side plates, and is characterized in that the panel, the back plate and the side plates are integrally formed, the lower side of the main box body is an open side, and an input shaft hole, a middle shaft hole and an output half shaft hole are correspondingly arranged on the panel and the back plate from top to bottom; the lower side of the main box body is connected with a bottom cover and sealed by the bottom cover, wherein the part of the bottom cover between the panel and the back plate is downwards raised and is arc-shaped to form a differential abdicating groove; and a first sliding groove for mounting a differential is correspondingly arranged between the lower ends of the panel and the back plate and the output half shaft hole, and a second sliding groove for assembling a gear is correspondingly arranged between the output half shaft hole and the middle shaft hole.

2. The transmission case according to claim 1, wherein a connecting flange is provided on an outer side of the main case between the intermediate shaft hole and the output half shaft hole, and the connecting flange is formed integrally with the main case.

3. The transmission case of claim 1, wherein the inner side of the bottom cover is substantially planar corresponding to the first slot to form a differential support ledge.

4. A gearbox housing as defined in claim 1, wherein said bottom cover is bolted to the underside of the main housing.

5. A gearbox housing as defined in claim 1, wherein a seal is provided between the bottom cover and the lower end of the main housing for a full revolution around the underside of the main housing.

6. The transmission case according to claim 1, wherein a collar is formed on the outer side of the face plate to correspond to the input shaft hole and the intermediate shaft hole and to have the same axis; and an output half shaft sleeve is formed on the outer sides of the panel and the back plate and corresponds to the output half shaft hole and the same axial lead.

7. The transmission case of claim 1, wherein a motor flange is formed on an upper portion of the back plate of the main case, and a motor mounting hole is formed in the motor flange.

8. The transmission case of claim 1, wherein oil injection holes and air discharge holes are provided in an upper portion of the side plate of the main case, wherein the oil injection holes and the air discharge holes are distributed on opposite sides of the main case.