CN217124529U - Electric drive axle and have tire road roller of this electric drive axle - Google Patents
Electric drive axle and have tire road roller of this electric drive axle Download PDFInfo
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- CN217124529U CN217124529U CN202121435726.XU CN202121435726U CN217124529U CN 217124529 U CN217124529 U CN 217124529U CN 202121435726 U CN202121435726 U CN 202121435726U CN 217124529 U CN217124529 U CN 217124529U
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- axle
- speed reducer
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Abstract
The utility model relates to an electric drive axle technical field, its purpose provides an electric drive axle and has this electric drive axle's pneumatic roller, and the integrated level is high, compact structure is reasonable, promote space utilization greatly and be applicable to the less engineering machine tool of tire interval such as pneumatic roller. Electric drive axle is including airtight and bilateral symmetry's axle housing (1), motor stator (201), electric motor rotor (202) and speed reducer (3), motor stator (201) set up in axle housing (1), stretch out at the both ends of electric motor rotor (202) axle housing (1) respectively with speed reducer (3) coaxial coupling. The utility model provides a current electric drive axle structure complicated, not compact, the great problem of occupation space.
Description
Technical Field
The utility model relates to an electric drive axle technical field, concretely relates to electric drive axle and have tire road roller of this electric drive axle.
Background
An electric drive axle is a mechanism located at the end of a transmission system and used for transmitting the rotating speed and torque of a drive motor to a drive wheel, and generally comprises the drive motor, a speed reducer, a differential, a wheel transmission device, a drive axle housing and the like.
At present, an integrated motor drive axle has two arrangement modes, one is that the axis of a drive motor is arranged in parallel with the axis of an output shaft, and the other is that the axis of the drive motor is arranged coaxially with the axis of the output shaft. The mode that the axis of driving motor and the axis of output shaft are arranged in parallel has complicated structure and large occupied space, and is not suitable for the engineering machinery with smaller tire spacing. The structure of the drive axle driven by the motor is relatively compact, as disclosed in chinese patent document CN101348075A, the drive axle mainly includes a motor, a differential, a first planetary gear reducer and a second planetary gear reducer, the motor is disposed in the middle of the drive axle, one end of the motor is coaxially connected with the first planetary gear reducer, the other end is coaxially and sequentially connected with the differential and the second planetary gear reducer, a brake device is disposed between the differential and the second planetary gear reducer, and the service brake system and the parking brake system are integrated.
Although the axle of the driving motor and the axle of the output shaft are arranged coaxially in the electric drive axle disclosed in the above-mentioned document, the electric drive axle is provided with a half shaft, a central shaft and other mechanisms, so that the structure is complicated, and in addition, the parts for realizing service braking and parking braking in the braking device are two different sets of assemblies, so that the structure of the braking device is complicated, the number of parts is large, and further the structure of the electric drive axle is not compact enough and the occupied space is large.
SUMMERY OF THE UTILITY MODEL
Therefore, the utility model discloses the technical problem that solves or improve lies in overcoming the more complicated, the not compact enough, the great defect of occupation space of structure of electric drive axle among the prior art to provide an integrated level height, compact structure is reasonable, promote space utilization's electric drive axle and have this electric drive axle's tire road roller greatly.
In order to solve the problem, the utility model provides an electric drive axle, axle housing, motor stator, electric motor rotor and speed reducer including airtight and bilateral symmetry, motor stator set up in the axle housing, electric motor rotor's both ends are stretched out the axle housing respectively with speed reducer coaxial coupling.
Preferably, the output end of the speed reducer is connected with a brake.
Preferably, the brake is arranged on a speed reducer shell, the brake comprises a brake shell, a brake pad, a brake caliper and a brake driving piece, the brake pad, the brake caliper and the brake driving piece are arranged in the brake shell, a compression elastic part is arranged between the inner wall of the brake shell and one side of the brake caliper, and the axis of the compression elastic part is parallel to the axis of the rotor.
Preferably, the compression elastic component is a plurality of compression springs; the braking driving part is one of an electromagnetic force driving part, an oil cylinder and an air cylinder.
Preferably, the axle housing comprises two bilateral symmetry axle housing parts, and the axle housing parts are in sealing connection.
Preferably, a cooling liquid is arranged in a gap between the motor stator and the axle housing.
Preferably, the electric drive axle has a vent pipe on its axis.
Preferably, the speed reducer adopts a two-stage planetary speed reducer.
A tyre roller having an electric drive axle as described above, comprising at least two front wheel units and at least two rear wheel units, the front wheel units and/or the rear wheel units being driven by the electric drive axle.
Preferably, the front wheel unit and the electric drive axle form a front drive unit, a transition support is arranged in the middle of an axle housing of the electric drive axle in the front drive unit, the two front drive units are connected through a grouping bogie, and two ends of the grouping bogie are respectively connected with the transition supports of the two front drive units.
The utility model provides an electric drive axle, direct coaxial coupling speed reducer does not exist other redundant parts respectively at electric motor rotor both ends, has greatly optimized electric drive axle's structure, has improved electric drive axle's integrated level, makes its structure compacter, reasonable, has promoted space utilization greatly, the utility model provides an electric drive axle can arrange on the wheel assembly around the tire road roller in a flexible way.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are 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 shows a schematic view of the overall structure of an electric drive axle of the present invention;
fig. 2 shows a schematic view of the electric drive axle of the present invention after assembly with a tire;
fig. 3 shows a schematic structural diagram of a speed reducer in an electric drive axle of the present invention;
fig. 4 shows a schematic structural diagram of a brake in an electric drive axle according to the present invention;
fig. 5 shows a schematic view of a pneumatic tyre roller with an electric drive axle according to the invention;
fig. 6 shows a schematic view of two front drive units in a pneumatic roller with an electric drive axle according to the present invention;
FIG. 7 shows a schematic view of the transition leg and the ganged bogie of FIG. 6;
fig. 8 shows a schematic view of two rear drive units in a pneumatic tyre roller with an electric drive axle according to the invention.
Description of reference numerals:
1-axle housing, 101-axle housing split piece;
201-motor stator, 202-motor rotor, 203-bearing;
3-speed reducer, 301-fixed gear ring, 302-first stage planetary reduction mechanism planet carrier, 303-first stage planetary reduction mechanism planet wheel, 304-second stage planetary reduction mechanism sun wheel, 305-speed reducer shell, 306-second stage planetary reduction mechanism planet wheel, 307-heavy load bearing, 308-bearing, 309-rim mounting surface;
4-brake, 401-brake housing, 402-brake pad, 403-brake caliper, 404-brake driver, 405-compression spring;
5-an air duct; 6-tyre; 7-a precursor unit; 8-a rear drive unit; 9-a transition scaffold; 10-group bogie, 11-follow wheel and 12-connecting frame.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, the present invention provides a preferred embodiment of an electric drive axle.
The utility model discloses an electric drive axle includes axle housing 1, motor stator 201 and electric motor rotor 202. The axle housing 1 is a housing of the driving motor, and is used for bearing and mounting components. Axle housing 1 is a closed housing and bilateral symmetry, has two axle housing parts 101, and two axle housing parts 101 pass through bolt or other mode fixed connection together, form the axle housing, and sealing connection between two axle housing parts 101, specifically, be equipped with sealing material between two axle housing parts 101, make axle housing 1 form a confined space, and after the axle housing assembly was accomplished, have bilateral symmetry's two rim installation faces 309, two tires 6 install on two rim installation faces 309 symmetrically, as shown in fig. 2.
The motor rotor 202 is coaxially installed in the motor stator 201, two ends of the motor rotor 202 are connected with the axle housing 1 through the bearing 203, an inner ring of the bearing 203 is tightly matched with the motor rotor 202, and an outer ring of the bearing 203 is in transition fit with the axle housing 1. The two ends of the motor rotor 202 extend out of the axle housing 1 and are respectively coaxially connected with the speed reducer 3, and the speed reducer 3 is further connected with the brake 4 (for convenience of drawing, the structure of the brake in fig. 1 is a simplified drawing, and the specific structure of the brake is shown in fig. 4 in detail). Further, the two ends of the motor rotor 202 extending out of the axle housing 1 are sealed with the axle housing 1, and the two ends of the motor rotor 202 extending out of the axle housing 1 are equipped with gears (the gears and the two ends of the motor rotor 202 are drawn as an integral body in the figure) as the input of the speed reducer.
In this embodiment, the speed reducer 3 is a two-stage planetary speed reducer, and the two-stage planetary speed reducer has the characteristics of large reduction ratio, large output torque, and strong bearing capacity. The two ends of the motor rotor 202 extending out of the axle housing 1 are directly and coaxially connected with the two-stage planetary reducer, the gear fixed on the motor rotor 202 is used as a sun gear of a first-stage planetary reduction mechanism of the reducer to drive the reducer to operate, and the output of the motor realizes torque increase and speed reduction through two-stage reduction.
Specifically, as shown in fig. 3, the speed reducer has a speed reducer housing 305, a fixed ring gear 301 is provided in the speed reducer housing 305, one end of the fixed ring gear 301 is fixedly connected to the axle housing 1 through a flange surface (speed reducer mounting surface), the other end serves as a second-stage planetary reduction mechanism carrier, the fixed ring gear 301 also serves as a first-stage planetary reduction mechanism ring gear, a first-stage planetary reduction mechanism carrier 302 and a first-stage planetary reduction mechanism planet gear 303 are provided in the middle of the fixed ring gear 301, the first-stage planetary reduction mechanism carrier 302 serves as an output end of the first-stage planetary reduction mechanism and is fixedly connected to a second-stage planetary reduction mechanism sun gear 304, a bearing 308 is provided between the second-stage planetary reduction mechanism sun gear 304 and the fixed ring gear 301, a second-stage planetary reduction mechanism planet gear 306 is mounted on the other end of the fixed ring gear 301, i.e. the second-stage planetary reduction mechanism carrier, the reducer housing 305 also serves as a second-stage planetary reduction gear ring, and is the output of the entire reducer. A heavy-duty bearing 307 is also provided between the fixed ring gear 301 and the reducer housing 305.
The reduction gear housing 305 has two flange surfaces, a first flange surface is a rim mounting surface 309, the rim is directly mounted on the rim mounting surface 309 through bolts, and a second flange surface is a brake piece 402 of the butterfly brake, wherein the brake piece 402 can be a separate part mounted on the reduction gear housing or can be designed as a part integrally molded with the reduction gear housing.
As shown in fig. 4, the brake 4 is provided on the speed reducer housing 305, and the brake 4 includes a brake housing 401, and a brake pad 402, a brake caliper 403, and a brake driver 404 provided in the brake housing 401. A compression elastic component 405 is arranged between the inner wall of the brake shell 401 and one side of the brake caliper 403, the compression elastic component 405 is a plurality of compression springs, and the compression springs have certain compression amount and provide braking force meeting requirements. The axis of the compression elastic component 405 is parallel to the axis of the rotor 202, the other side of the brake caliper 403 is pressed against the brake pad 402 under the action of the compression elastic component 405, and the brake caliper 403 can push the brake caliper 403 away from the brake pad 402 under the driving of the brake driver 404 against the restoring force of the compression elastic component 405. The brake actuator 404 may be one of an electromagnetic force actuator, a cylinder, and a cylinder. In this embodiment, the brake driving member 404 is an oil cylinder, when the oil cylinder extends, the pressure between the brake caliper and the brake pad can be reduced, and in the process, service braking is realized until the brake caliper and the brake pad are completely separated, and no braking is performed when the vehicle normally runs.
Therefore, the utility model discloses stopper in the electric drive axle only needs the extension length of control braking driving piece, can accomplish service braking or parking braking, and the executive component who accomplishes service braking moreover is the same with the executive component who accomplishes parking braking completely, does not have other redundant structure, and the design concept is ingenious, and compact structure is reasonable. Compared with the prior art, the utility model discloses stopper structure among the H type electric drive axle is optimized more, compact, and reasonable in design has further reduced the overall dimension of H type electric drive axle, makes the utility model provides an H type electric drive axle is applicable to the less engineering machine tool of tire interval very much, can let whole car arrange more in a flexible way.
In addition, the electric drive bridge can realize electromagnetic braking and kinetic energy recovery by controlling the current direction of the motor, so that the driving braking force of the electric drive bridge is increased. Through motor kinetic energy recovery and brake force control of the brake, the maximum brake torque of the vehicle can be greatly improved. Under the common working condition, the kinetic energy of the motor is recovered, so that energy conservation can be realized.
An air duct 5 is arranged on the axis of the electric drive axle, the air duct 5 penetrates through the axis of the electric drive axle, the port of the air duct 5 is arranged on the speed reducer shell and can move relative to the speed reducer shell, and the air duct 5 is used for centralized inflation pipeline arrangement.
As shown in fig. 5 to 8, the present embodiment also provides a pneumatic roller having the electric drive axle, comprising two front wheel units and two rear wheel units, each front wheel unit comprising two tires 6, and each rear wheel unit also comprising two tires 6, and further, in the present embodiment, a follower wheel 11 is provided between the two rear wheel units. In this embodiment, the front wheel unit and the rear wheel unit are driven by the electric drive axle, so that the front wheel unit and the rear wheel unit both have driving capability, the climbing capability of the pneumatic tyre roller can be greatly improved, and the reduction of the oil consumption of the pneumatic tyre roller is facilitated.
The front wheel unit and the electric drive axle form a front drive unit 7, that is, the pneumatic roller of the present embodiment has two front drive units 7, and similarly, the rear wheel unit and the other electric drive axle form a rear drive unit 8, that is, the pneumatic roller of the present embodiment has two rear drive units 8. A transition support 9 is arranged in the middle of an axle housing 1 of an electric drive axle in the front drive unit 7, the transition supports 9 of the two front drive units 7 are connected through a grouping bogie 10, namely, the two ends of the grouping bogie 10 are respectively connected with the transition supports 9 of the two front drive units 7, so that connection is realized. The rear drive units 8 are connected through a connecting frame 12.
The utility model provides a working process of pneumatic tyre roller with electric drive axle is:
1) when the electric drive axle generates driving force, the driving motor is electrified to rotate, and then the speed and torque are reduced and increased through the speed reducers on the left side and the right side to drive the tires to rotate, so that the driving force is generated;
2) during deceleration, firstly, the motor generates braking moment in the process of recovering kinetic energy, and then the deceleration of the vehicle is controlled by controlling the braking force of the brake;
3) after the vehicle stops, air pressure or hydraulic pressure in the brake is discharged, and a compression spring in the brake rebounds to clamp a brake caliper and a brake pad of the brake to realize parking brake.
The utility model provides an electric drive axle can be applied to on the hybrid or pure tire machine that has the driving force of full round. And, in other embodiments, for saving the cost, can only set up at front wheel unit or rear wheel unit the utility model discloses an H type electric transaxle realizes the drive.
In other embodiments, the brake may be a disc brake or a drum brake, and the speed reducer may adopt other forms of speed reducers.
In other embodiments, no air duct 5 may be provided on the axis of the electric transaxle.
In other embodiments, the speed reducer may not be connected to the brake in the electric drive axle, and only the motor is used to recover the kinetic energy to generate the braking moment, which can also achieve the purpose of the present invention.
In other embodiments, the pneumatic tyre roller with the electric drive axle of the present invention may include four front wheel units, four rear wheel units, etc., that is, the present invention does not limit the number of the front wheel units and the rear wheel units of the pneumatic tyre roller.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.
Claims (10)
1. An electric transaxle, comprising: axle housing (1), motor stator (201), electric motor rotor (202) and speed reducer (3) including airtight and bilateral symmetry, motor stator (201) set up in axle housing (1), stretch out at the both ends of electric motor rotor (202) axle housing (1) respectively with speed reducer (3) coaxial coupling.
2. The electric drive axle of claim 1, wherein: the output end of the speed reducer (3) is connected with a brake (4).
3. The electric drive axle of claim 2, wherein: the brake (4) is arranged on a speed reducer shell (305), the brake (4) comprises a brake shell (401), a brake pad (402), a brake caliper (403) and a brake driving piece (404), the brake pad, the brake caliper and the brake driving piece are arranged in the brake shell (401), a compression elastic component (405) is arranged between the inner wall of the brake shell (401) and one side of the brake caliper (403), and the axis of the compression elastic component (405) is parallel to the axis of the rotor (202).
4. The electric drive axle of claim 3, wherein: the compression elastic component (405) is a plurality of compression springs; the brake driving member (404) is one of an electromagnetic force driving member, an oil cylinder and an air cylinder.
5. The electric drive axle of claim 1, wherein: axle housing (1) includes two bilateral symmetry's axle housing divides piece (101), two axle housing divides piece (101) sealing connection.
6. The electric drive axle of claim 1, wherein: and cooling liquid is arranged in a gap between the motor stator (201) and the axle housing (1).
7. The electric drive axle of claim 1, wherein: the electric drive axle is provided with a ventilation pipeline (5) on the axis.
8. The electric drive axle of claim 1, wherein: the speed reducer (3) adopts a two-stage planetary speed reducer.
9. A tyre roller having an electric drive axle according to any one of claims 1 to 8, characterized in that: comprising at least two front wheel units and at least two rear wheel units, said front wheel units and/or said rear wheel units being driven by said electric drive axle.
10. A tyre roller as claimed in claim 9, wherein: the front wheel unit and the electric drive axle constitute forerunner's unit (7), be provided with transition support (9) in forerunner's unit (7) on the intermediate position of electric drive axle's axle housing (1), two forerunner's unit (7) are connected through grouping bogie (10), the both ends of grouping bogie (10) are connected two respectively forerunner's unit (7) transition support (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121435726.XU CN217124529U (en) | 2021-06-25 | 2021-06-25 | Electric drive axle and have tire road roller of this electric drive axle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121435726.XU CN217124529U (en) | 2021-06-25 | 2021-06-25 | Electric drive axle and have tire road roller of this electric drive axle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217124529U true CN217124529U (en) | 2022-08-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121435726.XU Active CN217124529U (en) | 2021-06-25 | 2021-06-25 | Electric drive axle and have tire road roller of this electric drive axle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217124529U (en) |
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2021
- 2021-06-25 CN CN202121435726.XU patent/CN217124529U/en active Active
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