CN216742724U - Electric motor car silence gearbox box - Google Patents
Electric motor car silence gearbox box Download PDFInfo
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- CN216742724U CN216742724U CN202220514253.0U CN202220514253U CN216742724U CN 216742724 U CN216742724 U CN 216742724U CN 202220514253 U CN202220514253 U CN 202220514253U CN 216742724 U CN216742724 U CN 216742724U
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Abstract
The utility model discloses a silent 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 parts of the panel and the back plate are provided with shaft holes correspondingly, and the lower parts of the panel and the back plate are provided with upper arc-shaped notches correspondingly; 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. The utility model can greatly improve the processing precision of the box body, thereby reducing the high-speed driving noise and greatly reducing the probability of oil leakage.
Description
Technical Field
The utility model relates to the field of electric vehicle gearboxes, in particular to a silent gearbox body of an electric vehicle.
Background
An electric drive and control system in an electric (new energy) automobile is the core of the electric automobile and is also the biggest difference from an internal combustion engine automobile; the electric driving and controlling system consists of driving motor, power supply, motor speed regulating controller, etc.
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 of 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, so that a new energy electric vehicle rear axle gearbox assembling structure is needed.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model aims to solve the problems of low machining precision of a gearbox, large sealing area, easy oil leakage and high-speed driving noise caused by low meshing degree of gears after assembly, and provides the mute gearbox body of the electric vehicle, which can greatly improve the machining precision of the box body, thereby reducing the high-speed driving noise and greatly reducing the oil leakage probability.
In order to solve the technical problem, the technical scheme adopted by the utility model is as follows: the utility model provides an electric motor car silence gearbox casing which characterized in that: the box comprises a main box body and a bottom cover, 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, 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, the front cover plate, the rear cover plate and the bottom plate are integrated, 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; connecting ribs are respectively arranged at corresponding positions of the lower side of the panel and the upper side of the front cover plate and at corresponding positions of the lower side of the back plate and the upper side of the back cover plate, and connecting holes are formed in the connecting ribs; the main box body and the bottom cover are connected through bolts penetrating through the connecting holes in the corresponding connecting ribs, the upper arc-shaped notches in the panel and the back plate are respectively matched with the lower arc-shaped notches in the front cover plate and the rear cover plate to form a circular half shaft hole, and the axial leads of the two half shaft holes are overlapped.
Furthermore, an upper sleeve flange and a lower sleeve flange with arc-shaped sections are respectively arranged on the outer sides of the upper arc-shaped notch and the lower arc-shaped notch, and the upper sleeve flange and the lower sleeve flange are matched to form a complete set of pipe flanges; the sleeve upper flange and the sleeve lower flange are both provided with connecting holes.
Furthermore, an upper half shaft sleeve plate and a lower half shaft sleeve plate, the sections of which are arc-shaped, are arranged on the outer sides of the upper arc-shaped notch and the lower arc-shaped notch respectively, and the upper half shaft sleeve plate and the lower half shaft sleeve plate are matched to form a half shaft sleeve.
Furthermore, a differential mechanism mounting boss is respectively arranged on the inner sides of the front cover plate and the rear cover plate, and differential mechanism locking holes are respectively arranged at two ends of the differential mechanism mounting boss.
Furthermore, a motor mounting flange is formed at the edge of one side, close to the back plate, of the upper part of the side plate of the main box body, and motor mounting holes are formed in the motor mounting flange.
Furthermore, oil injection holes are respectively arranged at the lower part of the main box body and close to the two ends of the side plate.
Furthermore, a lantern ring is arranged on the outer side of the shaft hole and on the same axis, and reinforcing ribs are arranged between the lantern ring and the panel or the back plate correspondingly.
Compared with the prior art, the utility model has the following advantages:
1. in the utility model, the main box body is integrally formed, so that the machining can be finished after one-time clamping in the shaft hole machining process; meanwhile, the whole gearbox adopts an upper and lower structure, so that the main box body and the bottom cover can be assembled firstly, and then the half shaft hole is machined, thereby realizing the machining of the shaft hole and the half shaft hole by one-time clamping, avoiding accumulated errors caused by multiple times of clamping, greatly improving the machining precision, ensuring the gear meshing degree to be more than 95 percent by batch production, and stably and greatly reducing the noise in the driving process.
2. In the utility model, because the whole gearbox adopts an up-down structure, the contact area between the main box body and the bottom cover is small, and the binding surface is large, the sealing area of the whole gearbox body is small, thereby greatly reducing the risk of oil leakage.
3. In the utility model, the differential installation boss is arranged on the inner side of the bottom shell, so that the differential can be installed in the gearbox body to form a 'wrapped-in-package' structure, and the protection effect of the gearbox on the differential can be effectively improved; and when needing to maintain, change differential mechanism etc. only need pull down the bottom, can lift off bottom and differential mechanism is whole to be convenient for differential mechanism's dismouting and maintenance.
4. By adopting the utility model, the lubricating oil is directly stored in the gearbox and is not stored on the rear axle, thereby greatly reducing the possibility of lubricating oil leakage; and, because the sealed face of gearbox is few, sealed effectual, can further improve lubricated effect like this.
Drawings
Fig. 1 is a schematic structural view of embodiment 1.
Fig. 2 is a schematic structural diagram of the bottom cover in embodiment 1.
In the figure: the structure comprises a main box body, a bottom cover, a shaft hole, a connecting rib, a sleeve pipe upper flange, a sleeve pipe lower flange, a differential mechanism mounting boss, a differential mechanism locking hole, a motor mounting flange, an oil injection hole, a lantern ring and a reinforcing rib, wherein the main box body comprises 1 part, 2 part of the bottom cover, 3 parts of the shaft hole, 4 parts of the connecting rib, 5 parts of the sleeve pipe upper flange, 6 parts of the sleeve pipe lower flange, 7 parts of the differential mechanism mounting boss, 8 parts of the differential mechanism locking hole, 9 parts of the motor mounting flange, 10 parts of the oil injection hole, 11 parts of the lantern ring and 12 parts of the reinforcing rib.
Detailed Description
The utility model will be further explained with reference to the drawings and the embodiments.
Example 1: referring to fig. 1 and 2, the mute gearbox body of the electric vehicle comprises a main box body 1 and a bottom cover 2. The main box body 1 comprises a panel, a back plate and side plates, wherein the panel, the back plate and the side plates are integrally formed, and the lower side of the main box body 1 is an open side. The upper corresponding position of panel and backplate has seted up shaft hole 3, the shaft hole 3 outside is equipped with lantern ring 11 with the axis, and as preferred, the internal diameter of this lantern ring 11 is unanimous with the internal diameter in shaft hole 3 for installation axle or bearing etc. to the axle supports better. The lantern ring 11 is correspondingly provided with a reinforcing rib 12 between the panel or the back plate, wherein the lantern ring 11, the reinforcing rib 12 and the main box body 1 are integrally formed through die casting and the like, and therefore the stability of the whole gearbox is further improved. In the implementation process, when the gearbox does not need to shift gears, the shaft hole 3 only comprises the motor input shaft hole 3 or the motor input shaft hole 3 and the middle shaft hole 3; when the gearbox needs to shift gears, a gear shaft hole 3, a shifting fork shaft hole 3 and the like need to be further arranged, so that the gearbox body can adapt to variable gears and non-variable gears, and the applicability is better.
The corresponding positions of the lower sides of the panel and the back plate are provided with upper arc-shaped notches; in the processing process, the upper arc-shaped notch is semicircular and is located on the same axis. A motor mounting flange 9 is formed at the edge of one side close to the back plate at the upper part of the side plate of the main box body 1, and a motor mounting hole is formed in the motor mounting flange 9; in this way, the installation of the motor is facilitated. Oil filling holes 10 are respectively formed in the lower part of the main box body 1 and close to the two ends of the side plate, and oil filling screw plugs are installed in the oil filling holes 10 in a matched mode; 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; and, because the sealed face of gearbox is few, sealed effectual, can further improve lubricated effect like this.
The bottom cover 2 includes a front cover plate, a rear cover plate, and a bottom plate, which are integrated, and the upper side of the bottom cover 2 is an open side. Preferably, the lower side surface of the main case 1 and the upper side surface of the bottom cover 2 are both flat surfaces, and further, the flat surfaces are parallel to a horizontal plane, so that the processing is simpler and the assembly is more convenient. 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; preferably, the lower arc-shaped notch is also semicircular, so that a round hole can be formed by matching with the upper arc-shaped notch.
Connecting ribs 4 are respectively arranged at corresponding positions of the lower side of the panel and the upper side of the front cover plate and at corresponding positions of the lower side of the back plate and the upper side of the back cover plate, and connecting holes are formed in the connecting ribs 4; the main box body 1 and the bottom cover 2 are connected through bolts penetrating through the corresponding connecting holes in the connecting ribs 4, the upper arc-shaped notches in the panel and the back plate are respectively matched with the lower arc-shaped notches in the front cover plate and the rear cover plate to form a circular half shaft hole, and the axial leads of the two half shaft holes are overlapped. In the implementation process, a sealing ring is arranged between the main box body 1 and the bottom cover 2, so that the sealing effect of the connecting surface of the main box body 1 and the bottom cover 2 is better.
A differential mechanism mounting boss 7 is respectively arranged at the inner sides of the front cover plate and the rear cover plate, and differential mechanism locking holes 8 are respectively arranged at two ends of the differential mechanism mounting boss 7; the differential locking hole 8 penetrates through the lower side of the bottom cover 2, thereby facilitating the installation and fixation of the differential. The differential mounting boss 7 is arranged on the inner side of the bottom shell, so that the differential can be mounted in the gearbox body to form a 'wrapped-in-package' structure, and the protection effect of the gearbox on the differential can be effectively improved; and, when needing to maintain, change differential mechanism etc. only need pull down bottom 2, can lift down bottom 2 and differential mechanism are whole to be convenient for differential mechanism's dismouting and maintenance.
In the scheme, a sleeve upper flange 5 and a sleeve lower flange 6 with arc-shaped sections are respectively arranged on the outer sides of the upper arc-shaped notch and the lower arc-shaped notch, and the sleeve upper flange 5 and the sleeve lower flange 6 are matched to form a complete set of pipe flange; and the axis of the sleeve flange plate is superposed with the axis of the half shaft hole, and the inner diameter of the sleeve flange plate is consistent with the aperture of the half shaft hole. The sleeve upper flange 5 and the sleeve lower flange 6 are both provided with connecting holes. The sleeve flange plate is used for being connected with the half shaft sleeve, so that the assembly is more convenient and the stability of the half shaft is improved. When in implementation, the sleeve upper flange 5 and/or the sleeve lower flange 6 are/is provided with air vents, and the air vents are communicated with the inner side of the main box body 1; and a one-way exhaust valve is arranged in the air vent hole, so that the damage of the gearbox caused by overlarge pressure in the gearbox body is avoided.
During processing, the main box body 1 is integrally formed, so that the processing can be finished after one-time clamping in the processing process of the shaft hole 3; meanwhile, the whole gearbox adopts an upper and lower structure, so that the main box body 1 and the bottom cover 2 can be assembled firstly, and then the half shaft holes are machined, thereby realizing the machining of the shaft holes 3 and the half shaft holes by one-time clamping, avoiding accumulated errors caused by multiple clamping, greatly improving the machining precision, ensuring the gear meshing degree to be more than 95 percent by batch production, and stably and greatly reducing the noise in the driving process.
Because the whole structure from top to bottom that adopts of gearbox, the area of contact between main tank 1 and the bottom 2 is little, and the binding face is big, therefore the sealed area of whole gearbox box is little to greatly reduced oil leak risk, and only adopt screwed connection, reduced the assembly degree of difficulty, also reduced assembly error, can effectively reduce cost.
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 modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all that should be covered by the claims of the present invention.
Claims (7)
1. The utility model provides an electric motor car silence gearbox casing which characterized in that: the box comprises a main box body and a bottom cover, 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, 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, the front cover plate, the rear cover plate and the bottom plate are integrated, 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; connecting ribs are respectively arranged at corresponding positions of the lower side of the panel and the upper side of the front cover plate and at corresponding positions of the lower side of the back plate and the upper side of the back cover plate, and connecting holes are formed in the connecting ribs; the main box body and the bottom cover are connected through bolts penetrating through the connecting holes in the corresponding connecting ribs, the upper arc-shaped notches in the panel and the back plate are respectively matched with the lower arc-shaped notches in the front cover plate and the rear cover plate to form a circular half shaft hole, and the axial leads of the two half shaft holes are overlapped.
2. The mute gearbox casing of the electric vehicle as recited in claim 1, wherein: an upper sleeve flange and a lower sleeve flange with arc-shaped sections are respectively arranged on the outer sides of the upper arc-shaped notch and the lower arc-shaped notch, and the upper sleeve flange and the lower sleeve flange are matched to form a complete set of pipe flange; the sleeve upper flange and the sleeve lower flange are both provided with connecting holes.
3. The mute gearbox casing of the electric vehicle as recited in claim 1, wherein: and the outer sides of the upper arc-shaped notch and the lower arc-shaped notch are respectively provided with a half-shaft upper sleeve plate and a half-shaft lower sleeve plate, the sections of which are arc-shaped, and the half-shaft upper sleeve plate and the half-shaft lower sleeve plate are matched to form a half-shaft sleeve.
4. The mute gearbox casing of the electric vehicle as recited in claim 1, wherein: differential installation bosses are respectively arranged on the inner sides of the front cover plate and the rear cover plate, and differential locking holes are respectively arranged at two ends of each differential installation boss.
5. The mute gearbox casing of the electric vehicle as recited in claim 1, wherein: a motor mounting flange is formed at the edge of one side, close to the back plate, of the upper part of the side plate of the main box body, and a motor mounting hole is formed in the motor mounting flange.
6. The mute gearbox casing of the electric vehicle as recited in claim 1, wherein: oil injection holes are respectively arranged at the lower part of the main box body and close to the two ends of the side plate.
7. The mute gearbox casing of the electric vehicle as recited in claim 1, wherein: the outer side of the shaft hole is provided with a lantern ring with the same axis, and a reinforcing rib is arranged between the lantern ring and the panel or the back plate correspondingly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220514253.0U CN216742724U (en) | 2022-03-10 | 2022-03-10 | Electric motor car silence gearbox box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220514253.0U CN216742724U (en) | 2022-03-10 | 2022-03-10 | Electric motor car silence gearbox box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216742724U true CN216742724U (en) | 2022-06-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220514253.0U Active CN216742724U (en) | 2022-03-10 | 2022-03-10 | Electric motor car silence gearbox box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216742724U (en) |
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2022
- 2022-03-10 CN CN202220514253.0U patent/CN216742724U/en active Active
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