CN213138498U

CN213138498U - Rear axle speed changing device of electric vehicle

Info

Publication number: CN213138498U
Application number: CN202021550116.XU
Authority: CN
Inventors: 牟乃军
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-07-30
Filing date: 2020-07-30
Publication date: 2021-05-07
Anticipated expiration: 2030-07-30

Abstract

The utility model discloses an electric vehicle rear axle speed change device, which comprises a box body, wherein a gear change shaft is arranged in the box body, a combination tooth I is arranged on the gear change shaft, the gear change shaft is connected with a differential mechanism through the combination tooth I, and the differential mechanism is fixed on the box body; the gear shifting shaft is also provided with a high-speed gear and a low-speed gear, the gear shifting shaft is connected with a first transmission shaft through the high-speed gear, the first transmission shaft is provided with a second combination gear and a third combination gear, and the third combination gear is connected with the low-speed gear; the transmission shaft I is provided with a first linkage tooth and is connected with a motor shaft through the first linkage tooth, and the motor shaft is connected with a brushless motor; the differential is connected with the hub through the transmission shaft II. The utility model provides an electric motor car rear axle speed change gear, this kind of speed change gear simple structure, transmission stability is good, realizes the effect of variable speed, more is fit for the operation, when the low-speed operation, makes the motor moment of torsion increase to can practice thrift the electric energy, improve life.

Description

Rear axle speed changing device of electric vehicle

Technical Field

The utility model relates to a speed change gear technical field of shifting particularly, relates to an electric motor car rear axle speed change gear.

Background

In agricultural machinery, a transmission system of an electric vehicle is widely applied, and a direct current motor transmits power through a gearbox to drive wheels to move forwards. The structure of the rear axle gear shifting speed changing device used by the existing electric vehicle basically adopts an electronic speed changing mode and a mechanical speed changing mode, the electronic speed changing mode is purely controlled by electrons, the stability is unsatisfactory, the mechanical speed changing mode is realized by mostly adopting a crank link mechanism, the rotary motion of a motor and the linear reciprocating motion of gear shifting and shifting are mutually perpendicular, the structure is complex, the size is large, the manufacturing process is complicated, and meanwhile, the structural stability is poor and the service life is short when the gear shifting mode is operated.

SUMMERY OF THE UTILITY MODEL

To the problem among the correlation technique, the utility model provides an electric motor car rear axle speed change gear solves current electric motor car rear axle speed change gear, and the structure is complicated, poor stability, the short problem of life.

In order to achieve the technical purpose, the technical scheme of the utility model is as follows:

the rear axle speed change device of the electric vehicle comprises a box body, wherein a gear change shaft is arranged in the box body, a first combination tooth is arranged on the gear change shaft, the gear change shaft is connected with a differential mechanism through the first combination tooth, and the differential mechanism is fixed on the box body; the gear shifting shaft is also provided with a high-speed gear and a low-speed gear, the gear shifting shaft is connected with a first transmission shaft through the high-speed gear, the first transmission shaft is provided with a second combination gear and a third combination gear, and the third combination gear is connected with the low-speed gear; the transmission shaft I is provided with a first linkage tooth and is connected with a motor shaft through the first linkage tooth, and the motor shaft is connected with a brushless motor; the differential is connected with the hub through the transmission shaft II.

Further, a second linkage tooth is arranged on the motor shaft and connected with the input shaft, a belt pulley is arranged on the input shaft, and the belt pulley is connected with an external power device.

Further, the rack of the high-speed gear is 1.5 die, and the number of teeth is 44; and the rack of the second combined tooth is 1.5 die, and the number of teeth is 16.

Further, the rack of the first linkage gear is 1.5 modules, and the number of teeth is 25; and the rack of the linkage gear II is 1.5 modules, and the number of teeth is 12.

Furthermore, the first transmission shaft and the motor shaft are both arranged in the box body, and the box body is made of corrosion-resistant materials.

The utility model has the advantages that: the rear axle speed changing device of the electric vehicle has the advantages of simple structure, good transmission stability, realization of speed changing effect, more suitability for operation, increase of motor torque during low-speed operation, electric energy saving and service life improvement.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a rear axle transmission of an electric vehicle according to an embodiment of the present invention;

fig. 2 is a schematic view of an input shaft connection structure in a rear axle transmission of an electric vehicle according to an embodiment of the present invention;

in the figure: 1. a differential mechanism; 2. a first combining tooth; 3. high-speed teeth; 4. a low speed gear; 5. a second combination tooth; 6. a third combination tooth; 7. motor shaft teeth; 8. a first linkage tooth; 9. a linkage tooth II; 10. shift sliding teeth; 11. a first transmission shaft; 12. a motor shaft; 13. a belt pulley; 14. an input shaft; 15. a gear shifting shaft; 16. a brushless motor.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art all belong to the protection scope of the present invention.

As shown in fig. 1, the rear axle transmission device of the electric vehicle according to the embodiment of the present invention comprises a box body, a shift shaft 15 is arranged in the box body, a first engaging tooth 2 is arranged on the shift shaft 15, the shift shaft 15 is connected to a differential 1 through the first engaging tooth 2, and the differential 1 is fixed on the box body; the gear shifting shaft 15 is also provided with a high-speed gear 3 and a low-speed gear 4, the gear shifting shaft 15 is connected with a transmission shaft I11 through the high-speed gear 3, the transmission shaft I11 is provided with a combination gear II 5 and a combination gear III 6, and the combination gear III 6 is connected with the low-speed gear 4; a first linkage tooth 8 is arranged on the first transmission shaft 11, the first transmission shaft 11 is connected with a motor shaft 12 through the first linkage tooth 8, and the motor shaft 12 is connected with a brushless motor 16; the differential 1 is connected with a hub through a transmission shaft II.

As shown in fig. 1-2, a second linkage tooth 9 is arranged on the motor shaft 12, the second linkage tooth 9 is connected with an input shaft 14, a belt pulley 13 is arranged on the input shaft 14, and the belt pulley 13 is connected with an external power device, so that multi-power input can be realized.

As shown in fig. 1, the rack of the high-speed gear 3 is 1.5 modules, and the number of the teeth is 44; the rack of the second combination tooth 5 is 1.5 modules, the number of teeth is 16, and the speed regulation effect can be realized.

As shown in fig. 1, the rack of the first linkage teeth 8 is 1.5 die, and the number of teeth is 25; the rack of the second linkage gear 9 is 1.5 modules, the number of teeth is 12, and the speed regulation design can be carried out according to the actual situation.

As shown in FIG. 1, the first transmission shaft 11 and the motor shaft 12 are both arranged in the box body, and the box body is made of corrosion-resistant materials, so that the service life can be prolonged.

In order to facilitate further understanding of the above technical solutions, the working principle thereof will now be explained:

as shown in fig. 1-2, the brushless motor 16 can provide power, the brushless motor 16 can drive the motor shaft 12 to rotate, the input shaft 14 is a rotation shaft, the input shaft 14 can be meshed with the first linkage teeth 8 on the transmission shaft 11 through the second linkage teeth 9, meanwhile, the second and

third combination teeth

5 and 6 on the transmission shaft 11 are respectively meshed with the high-speed teeth 3 and the low-speed teeth 4 on the shift shaft 15, and slide left and right through the shift sliding teeth 10, so as to drive the high-speed teeth 3 and the low-speed teeth 4 to be linked and change the speed, the first combination teeth 2 on the shift shaft 15 drive the differential mechanism to move, the differential mechanism 1 drives the second transmission shaft, both ends of the transmission shaft are connected with hubs, so that the tire rotates, each shaft in the whole device is stably driven, and the structural stability is good; when the speed reducing device is used specifically, the number of teeth of the high-speed teeth 3, the combination teeth II 5, the linkage teeth I8 and the linkage teeth II 9 can be adjusted to achieve different gear ratios, so that the speed changing effect of the rear axle speed changing device of the electric vehicle is realized, the operation is more suitable, the motor shaft teeth 7 are removed in the original motor shaft 12, the speed reduction is realized, the motor torque is increased when the speed reducing device operates at a low speed, the electric energy can be saved, and the service life is prolonged.

In the description of the present invention, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

In the present invention, unless otherwise explicitly specified or limited, for example, it may be fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.

It is noted that, in this document, relational terms such as "component" a "and" component "and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A rear axle speed changing device of an electric vehicle comprises a box body, wherein a gear changing shaft (15) is arranged in the box body, and is characterized in that a first combination tooth (2) is arranged on the gear changing shaft (15), the gear changing shaft (15) is connected with a differential (1) through the first combination tooth (2), and the differential (1) is fixed on the box body; the gear shifting shaft (15) is also provided with a high-speed gear (3) and a low-speed gear (4), the gear shifting shaft (15) is connected with a first transmission shaft (11) through the high-speed gear (3), the first transmission shaft (11) is provided with a second combination gear (5) and a third combination gear (6), and the third combination gear (6) is connected with the low-speed gear (4); a first linkage tooth (8) is arranged on the first transmission shaft (11), the first transmission shaft (11) is connected with a motor shaft (12) through the first linkage tooth (8), and the motor shaft (12) is connected with a brushless motor (16); the differential (1) is connected with the hub through a transmission shaft II.

2. The rear axle speed changing device of the electric vehicle as claimed in claim 1, wherein a second linkage tooth (9) is arranged on the motor shaft (12), the second linkage tooth (9) is connected with an input shaft (14), a belt pulley (13) is arranged on the input shaft (14), and the belt pulley (13) is connected with an external power device.

3. The rear axle speed change device of the electric vehicle as claimed in claim 1, wherein the rack of the high-speed teeth (3) is 1.5 die, and the number of teeth is 44; and the rack of the second combined tooth (5) is 1.5 model, and the number of teeth is 16.

4. The rear axle speed change device of the electric vehicle as claimed in claim 2, wherein the rack of the first linkage teeth (8) is 1.5 modules, and the number of teeth is 25; and the rack of the second linkage tooth (9) is 1.5 modules, and the number of teeth is 12.

5. The rear axle speed changing device of the electric vehicle as claimed in claim 1, wherein the first transmission shaft (11) and the motor shaft (12) are both disposed in the box body, and the box body is made of corrosion-resistant material.