CN214112284U - Electric heavy-load wet-type brake drive axle with super-large speed ratio - Google Patents
Electric heavy-load wet-type brake drive axle with super-large speed ratio Download PDFInfo
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- CN214112284U CN214112284U CN202023003821.0U CN202023003821U CN214112284U CN 214112284 U CN214112284 U CN 214112284U CN 202023003821 U CN202023003821 U CN 202023003821U CN 214112284 U CN214112284 U CN 214112284U
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- speed reducer
- assembly
- axle housing
- wet brake
- shell
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Abstract
The utility model discloses an electric heavy-load wet-type brake drive axle with an ultra-large speed ratio, which comprises a speed reducer shell, a secondary speed reducer assembly and a differential mechanism, wherein an output gear on an output shaft of the secondary speed reducer assembly is meshed with an input gear of the differential mechanism to form a third-stage speed reducer; the two sides of the speed reducer shell are respectively provided with an axle shell component, the end part of the axle shell component is rotatably provided with a wheel hub assembly, the axle shell component is also provided with a wet brake assembly, and the wet brake assembly is positioned at the inner side of the wheel hub assembly and used for braking the wheel hub assembly; a half shaft is rotatably arranged in each axle housing assembly, and the inner ends of the two half shafts are respectively connected to the two sides of the differential mechanism; the outer ends of the two half shafts are respectively connected with the corresponding wheel hub assemblies through a hub reduction gear to form fourth-stage speed reduction. The utility model has the advantages that: can realize that the transaxle possesses super large reduction ratio, applicable in electric heavy load tractor, guarantee minimum ground clearance simultaneously, guarantee the trafficability characteristic of vehicle.
Description
Technical Field
The utility model relates to a transaxle field, concretely relates to electronic heavily loaded wet-type brake transaxle of super large velocity ratio.
Background
Transaxles are important components of industrial vehicles, located at the end of the vehicle's driveline. The basic function is to reduce the rotating speed and increase the torque of the engine transmitted by the universal transmission device through the main reducer; changing the transmission direction of the torque through the bevel gear pair; the power is transmitted to the wheels through the half shafts to push the vehicle to move forward. Chinese utility model patent as publication number CN205573917U discloses a transaxle with wet braking and sectional type axle housing, it includes well axle housing, the differential mechanism assembly, left semi-axis and right semi-axis, the left axle housing and the right axle housing that the embedding was installed in well axle housing, the symmetry sets up in proper order from inside to outside and sets up the left axle housing and the right axle housing and left wheel reduction assembly and the right wheel reduction assembly of well axle housing left and right sides, and the symmetry sets up and is located well axle housing and left axle housing junction inboard respectively, the inboard left wet brake and the right wet brake of well axle housing and right axle housing junction. One end of the left half shaft is connected with the differential assembly, and the other end of the left half shaft sequentially penetrates through the left wet brake and the left axle housing and then is connected with the left wheel-side reducer assembly. One end of the right half shaft is connected with the differential assembly, and the other end of the right half shaft sequentially penetrates through the right wet brake and the right axle housing and then is connected with the right wheel-side reducer assembly.
The transmission ratio of a general main speed reducer is 3.5-6.7, and the too large transmission ratio can cause the driven bevel gear to be oversize, thus affecting the ground clearance at the lower end of the drive axle housing, and the smaller the ground clearance, the poorer the vehicle trafficability. This also limits the ability of a high ratio final drive to be mounted on small or compact vehicles. Therefore, large-tonnage traction equipment cannot be used in special fields with narrow space and complex environment, and the development of the field is restricted.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an electronic heavy load wet-type brake transaxle of super large velocity ratio can realize that the transaxle possesses super large reduction ratio, and applicable on electronic heavy load tractor, guarantees minimum ground clearance simultaneously, guarantees the trafficability characteristic of vehicle.
The utility model discloses a realize solving above-mentioned technical problem through following technical means: an electric heavy-load wet-type brake drive axle with an ultra-large speed ratio comprises a speed reducer shell, wherein a secondary speed reducer assembly and a differential mechanism are arranged in the speed reducer shell, and a motor mounting plate is arranged on the speed reducer shell at the end part of an input shaft of the secondary speed reducer assembly;
an output gear on an output shaft of the secondary speed reducer assembly is meshed with an input gear of the differential to form a third-stage speed reducer;
the two sides of the speed reducer shell are respectively provided with an axle shell component, the end part of the axle shell component is rotatably provided with a wheel hub assembly, the axle shell component is also provided with a wet brake assembly, and the wet brake assembly is positioned at the inner side of the wheel hub assembly and used for braking the wheel hub assembly;
a half shaft is rotatably arranged in each axle housing assembly, and the inner ends of the two half shafts are respectively connected to the two sides of the differential mechanism;
the outer ends of the two half shafts are respectively connected with the corresponding wheel hub assemblies through a hub reduction gear to form fourth-stage speed reduction.
The utility model provides an electronic heavily loaded wet-type brake transaxle of super large velocity ratio is when practical application, electric tractor power is in proper order through the second grade reduction gear assembly, a differential mechanism, the semi-axis, the transmission of wheel reduction gear, final drive wheel hub assembly rotates, the power of motor is through the level four speed reduction, in the practical application, preceding tertiary speed reduction velocity ratio is 23.5, the velocity ratio of wheel reduction gear is 4.25, and then whole transaxle velocity ratio can reach 99.88, the biggest external diameter of reduction gear only is phi 320mm, it is applicable on neotype 60 tons of electronic heavily loaded tractor, guarantee minimum ground clearance simultaneously, guarantee the trafficability characteristic of vehicle. The drive axle adopts wet braking, the brake is of a totally-enclosed structure, the annular working area is large, the immersion of mud, water and oil is prevented, and the braking is stable; the wet brake adopts a multi-disc structure, can obtain larger braking torque under smaller lining pressure, and the bearing pressure of elements is reduced, and the unit specific pressure of the friction plate is small; the brake adopts a single-brake piston propelling structure, the friction parts are uniformly stressed, the disc clearance is not required to be adjusted, the slipping and the torque transmission are permitted, and the brake is suitable for the heavy-load long-slope braking working condition. The wet brake is hydraulically driven, and oil liquid is circularly cooled, so that the wet brake has good heat dissipation performance, reduces maintenance and prolongs the service life; the fixed disk is connected with the brake shell through a spline, and the friction disk is arranged between the fixed disks and brakes along with the hub. The brake is safer and more reliable, the service life is longer, and the maintenance is almost not needed. The whole reduction ratio of the drive axle is large, so that larger torque amplification can be obtained, and the power of the motor can be reduced more, so that the energy consumption is reduced. The bridge is particularly suitable for being used by an electric tractor with compact spatial layout, has small volume, high speed ratio and large achievable traction force, can be suitable for most of domestic working condition environments through a novel closed wet braking system, is particularly suitable for industries with high requirements on fire prevention, such as wood, papermaking, mines and the like, and has the characteristic of almost no maintenance, so that the product stability is greatly improved.
Optimized, the reduction gear casing is including the left casing, the middle box, the right casing that connect gradually, and two axle housing subassemblies set up respectively on left casing left side and right casing right side.
Preferably, the motor mounting plate is provided with a motor, and an output shaft of the motor is connected with the input shaft.
Optimally, the input gear is a cylindrical gear, and the axis of the input gear is coaxial with the half shaft;
the input shaft, the output shaft and the intermediate shaft of the secondary speed reducer assembly are all parallel to the axis of the input gear.
Preferably, the gear of the secondary speed reducer assembly and the input gear of the differential are helical gears.
Preferably, the speed reducer further comprises a rotating speed sensor arranged on the speed reducer shell and used for detecting the rotating speed of the drive axle.
Preferably, the speed sensor adopts an encoder, the encoder is installed on a speed reducer shell, and a rotating shaft of the encoder is connected to an input shaft of the secondary speed reducer assembly.
Preferably, the axle housing assembly comprises an inner axle housing arranged on the side edge of the speed reducer housing, the outer end of the inner axle housing extends out of the side edge of the speed reducer housing, the outer axle housing is sleeved outside the extending part of the inner axle housing, and the inner end of the outer axle housing is welded with the speed reducer housing;
fixed ring is established to the outside cover of outer axle housing, wet brake assembly installs on fixed ring.
Preferably, the fixing ring is located outside the combining surface of the inner axle housing and the outer axle housing.
Optimized, the reduction gear casing side sets up the screw hole, inner axle housing end sets up the external screw thread, inner axle housing end is installed at the reduction gear casing side through the screw thread.
The utility model has the advantages that:
the utility model provides an electronic heavily loaded wet-type brake transaxle of super large velocity ratio is when practical application, electric tractor power is in proper order through the second grade reduction gear assembly, a differential mechanism, the semi-axis, the transmission of wheel reduction gear, final drive wheel hub assembly rotates, the power of motor is through the level four speed reduction, in the practical application, preceding tertiary speed reduction velocity ratio is 23.5, the velocity ratio of wheel reduction gear is 4.25, and then whole transaxle velocity ratio can reach 99.88, the biggest external diameter of reduction gear only is phi 320mm, it is applicable on neotype 60 tons of electronic heavily loaded tractor, guarantee minimum ground clearance simultaneously, guarantee the trafficability characteristic of vehicle. The drive axle adopts wet braking, the brake is of a totally-enclosed structure, the annular working area is large, the immersion of mud, water and oil is prevented, and the braking is stable; the wet brake adopts a multi-disc structure, can obtain larger braking torque under smaller lining pressure, and the bearing pressure of elements is reduced, and the unit specific pressure of the friction plate is small; the brake adopts a single-brake piston propelling structure, the friction parts are uniformly stressed, the disc clearance is not required to be adjusted, the slipping and the torque transmission are permitted, and the brake is suitable for the heavy-load long-slope braking working condition. The wet brake is hydraulically driven, and oil liquid is circularly cooled, so that the wet brake has good heat dissipation performance, reduces maintenance and prolongs the service life; the fixed disk is connected with the brake shell through a spline, and the friction disk is arranged between the fixed disks and brakes along with the hub. The brake is safer and more reliable, the service life is longer, and the maintenance is almost not needed. The whole reduction ratio of the drive axle is large, so that larger torque amplification can be obtained, and the power of the motor can be reduced more, so that the energy consumption is reduced. The bridge is particularly suitable for being used by an electric tractor with compact spatial layout, has small volume, high speed ratio and large achievable traction force, can be suitable for most of domestic working condition environments through a novel closed wet braking system, is particularly suitable for industries with high requirements on fire prevention, such as wood, papermaking, mines and the like, and has the characteristic of almost no maintenance, so that the product stability is greatly improved.
Drawings
Fig. 1 is a sectional view of an electric heavy-duty wet brake drive axle with a very large speed ratio according to an embodiment of the present invention;
wherein the content of the first and second substances,
the device comprises a speed reducer shell-1, a motor mounting plate-11, a left shell-12, a middle box-13 and a right shell-14;
a secondary speed reducer assembly-2, an input shaft-21, an output shaft-22, a middle shaft-23 and an output gear-221;
differential-3, input gear-31;
an axle housing assembly-4, an inner axle housing-41, an outer axle housing-42 and a fixing ring-43;
a hub assembly-5;
a wet brake assembly-6;
half-shaft-7;
a hub reduction gear-8;
a motor-9;
a rotating speed sensor-10.
Detailed Description
To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are 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 without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1, the electric heavy-duty wet brake drive axle with the ultra-high speed ratio comprises a speed reducer casing 1, a secondary speed reducer assembly 2, a differential mechanism 3, an axle housing assembly 4, a hub assembly 5, a wet brake assembly 6, a half shaft 7, a wheel hub speed reducer 8, a motor 9 and a rotating speed sensor 10.
As shown in fig. 1, a two-stage reduction gear assembly 2 and a differential 3 are provided in a reduction gear case 1, and a motor mounting plate 11 is provided on the reduction gear case 1 at an end portion of an input shaft 21 of the two-stage reduction gear assembly 2.
As shown in fig. 1, the output gear 221 of the output shaft 22 of the secondary reduction gear assembly 2 is engaged with the input gear 31 of the differential 3 to form a tertiary reduction gear.
As shown in fig. 1, the both sides of reduction gear housing 1 respectively set up an axle housing subassembly 4, and axle housing subassembly 4 tip is rotated and is installed wheel hub assembly 5, still is provided with wet brake assembly 6 on the axle housing subassembly 4, and wet brake assembly 6 is located wheel hub assembly 5 inboardly for brake wheel hub assembly 5, wet brake assembly 6 is prior art, and the market purchase can.
As shown in fig. 1, axle shafts 7 are rotatably mounted in the axle housing assemblies 4, and the inner ends of the axle shafts 7 are connected to both sides of the differential 3.
As shown in fig. 1, the outer ends of the half shafts 7 are connected to the corresponding hub assemblies 5 through a hub reduction gear 8, respectively, to form a fourth-stage reduction.
As shown in fig. 1, the reducer housing 1 includes a left housing 12, a middle box 13, and a right housing 14, which are connected in sequence, and the three are connected in sequence through bolts, and the two axle housing assemblies 4 are respectively disposed on the left side of the left housing 12 and the right side of the right housing 14.
As shown in fig. 1, in the present embodiment, the motor mounting plate 11 is a part of the middle box 13, and is used for mounting the motor 9.
As shown in fig. 1, the motor 9 is mounted on the motor mounting plate 11, and an output shaft of the motor 9 is connected to the input shaft 21.
As shown in fig. 1, the input gear 31 is a cylindrical gear, and the axis of the input gear 31 is coaxial with the axle shaft 7; the input shaft 21, the output shaft 22 and the intermediate shaft 23 of the two-stage speed reducer assembly 2 are all parallel to the axis of the input gear 31. The gears of the secondary speed reducer assembly 2 and the input gear 31 of the differential 3 are helical gears.
As shown in fig. 1, a rotation speed sensor 10 is further included on the reducer housing 1 for detecting the rotation speed of the drive axle, and the rotation speed sensor 10 is a conventional one. In practical application, the rotation speed sensor 10 is connected to a controller of a vehicle, and then the controller feeds back drive axle rotation speed information to the vehicle, wherein the controller is the prior art.
Further, the speed sensor 10 adopts an encoder, the encoder is installed on the reducer casing 1, and a rotating shaft of the encoder is connected to the input shaft 21 of the secondary reducer assembly 2.
As shown in fig. 1, the axle housing assembly 4 includes an inner axle housing 41 disposed on the side of the reducer casing 1, the outer end of the inner axle housing 41 extends out from the side of the reducer casing 1, an outer axle housing 42 is sleeved on the outer portion of the extending portion of the inner axle housing 41, and the inner end of the outer axle housing 42 is welded to the reducer casing 1.
As shown in fig. 1, the outer axle housing 42 is externally fitted with a fixing ring 43, and the wet brake assembly 6 is mounted on the fixing ring 43. The fixing ring 43 is located outside the combining surface of the inner axle housing 41 and the outer axle housing 42. The fixing ring 43 is installed outside the joint surface of the inner axle housing 41 and the outer axle housing 42 by welding or bolting.
1 side of reduction gear casing sets up the screw hole, inner axle case 41 is the inner external screw thread that sets up, inner axle case 41 is the inner through the screw thread installation at 1 side of reduction gear casing.
The working principle is as follows:
as shown in fig. 1, the utility model provides an electronic heavily loaded wet-type brake transaxle of super large velocity ratio is when practical application, electric tractor power is in proper order through second reduction gear assembly 2, differential mechanism 3, semi-axis 7, the transmission of wheel reduction gear 8, final drive wheel hub assembly 5 rotates, the power of motor is through the level four speed reduction, in the practical application, preceding tertiary speed reduction velocity ratio is 23.5, the velocity ratio of wheel reduction gear 8 is 4.25, and then whole transaxle velocity ratio can reach 99.88, the biggest external diameter of reduction gear only is phi 320mm, it is applicable in neotype 60 tons of electronic heavily loaded tractors, guarantee minimum ground clearance simultaneously, guarantee the trafficability characteristic of vehicle. The drive axle adopts wet braking, the brake is of a totally-enclosed structure, the annular working area is large, the immersion of mud, water and oil is prevented, and the braking is stable; the wet brake adopts a multi-disc structure, can obtain larger braking torque under smaller lining pressure, and the bearing pressure of elements is reduced, and the unit specific pressure of the friction plate is small; the brake adopts a single-brake piston propelling structure, the friction parts are uniformly stressed, the disc clearance is not required to be adjusted, the slipping and the torque transmission are permitted, and the brake is suitable for the heavy-load long-slope braking working condition. The wet brake is hydraulically driven, and oil liquid is circularly cooled, so that the wet brake has good heat dissipation performance, reduces maintenance and prolongs the service life; the fixed disk is connected with the brake shell through a spline, and the friction disk is arranged between the fixed disks and brakes along with the hub. The brake is safer and more reliable, the service life is longer, and the maintenance is almost not needed. The whole reduction ratio of the drive axle is large, so that larger torque amplification can be obtained, and the power of the motor can be reduced more, so that the energy consumption is reduced. The bridge is particularly suitable for being used by an electric tractor with compact spatial layout, has small volume, high speed ratio and large achievable traction force, can be suitable for most of domestic working condition environments through a novel closed wet braking system, is particularly suitable for industries with high requirements on fire prevention, such as wood, papermaking, mines and the like, and has the characteristic of almost no maintenance, so that the product stability is greatly improved.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. The utility model provides an electronic heavily loaded wet brake transaxle of super large velocity ratio which characterized in that: the speed reducer comprises a speed reducer shell (1), wherein a secondary speed reducer assembly (2) and a differential (3) are arranged in the speed reducer shell (1), and a motor mounting plate (11) is arranged on the speed reducer shell (1) at the end part of an input shaft (21) of the secondary speed reducer assembly (2);
an output gear (221) on an output shaft (22) of the secondary speed reducer assembly (2) is meshed with an input gear (31) of the differential (3) to form a third-stage speed reducer;
the two sides of the speed reducer shell (1) are respectively provided with an axle housing assembly (4), the end part of each axle housing assembly (4) is rotatably provided with a hub assembly (5), the axle housing assemblies (4) are also provided with wet brake assemblies (6), and the wet brake assemblies (6) are positioned on the inner sides of the hub assemblies (5) and used for braking the hub assemblies (5);
a half shaft (7) is rotatably arranged in each axle housing assembly (4), and the inner ends of the two half shafts (7) are respectively connected to two sides of the differential mechanism (3);
the outer ends of the two half shafts (7) are respectively connected with the corresponding wheel hub assemblies (5) through a wheel hub reduction gear (8) to form a fourth-stage speed reduction.
2. The electric heavy-duty wet brake transaxle of super large ratio of claim 1 wherein: the speed reducer shell (1) comprises a left shell (12), a middle box (13) and a right shell (14) which are sequentially connected, and the two axle housing assemblies (4) are respectively arranged on the left side of the left shell (12) and the right side of the right shell (14).
3. The electric heavy-duty wet brake transaxle of super large ratio of claim 1 wherein: the motor mounting plate (11) is provided with a motor (9), and an output shaft of the motor (9) is connected with the input shaft (21).
4. The electric heavy-duty wet brake transaxle of super large ratio of claim 1 wherein: the input gear (31) is a cylindrical gear, and the axis of the input gear (31) is coaxial with the half shaft (7);
an input shaft (21), an output shaft (22) and an intermediate shaft (23) of the secondary speed reducer assembly (2) are all parallel to the axis of the input gear (31).
5. The electric heavy-duty wet brake transaxle of super large ratio of claim 4 wherein: the gear of the secondary speed reducer assembly (2) and the input gear (31) of the differential (3) are helical gears.
6. The electric heavy-duty wet brake transaxle of super large ratio of claim 1 wherein: the speed reducer is characterized by further comprising a rotating speed sensor (10) arranged on the speed reducer shell (1) and used for detecting the rotating speed of the drive axle.
7. The electric heavy-duty wet brake transaxle of super large ratio of claim 6 wherein: the rotating speed sensor (10) adopts an encoder, the encoder is installed on the speed reducer shell (1), and a rotating shaft of the encoder is connected to an input shaft (21) of the secondary speed reducer assembly (2).
8. The electric heavy-duty wet brake transaxle of super large ratio of claim 1 wherein: the axle housing assembly (4) comprises an inner axle housing (41) arranged on the side edge of the reducer shell (1), the outer end of the inner axle housing (41) extends out of the side edge of the reducer shell (1), an outer axle housing (42) is sleeved outside the extending part of the inner axle housing (41), and the inner end of the outer axle housing (42) is welded with the reducer shell (1);
fixed ring (43) is established to outer axle housing (42) outside cover, wet brake assembly (6) are installed on fixed ring (43).
9. The electric heavy-duty wet brake transaxle of claim 8 of very high speed ratio, wherein: the fixing ring (43) is positioned outside the combining surface of the inner axle housing (41) and the outer axle housing (42).
10. The electric heavy-duty wet brake transaxle of claim 8 of very high speed ratio, wherein: reduction gear casing (1) side sets up the screw hole, interior axle housing (41) inner sets up the external screw thread, install at reduction gear casing (1) side through the screw thread in interior axle housing (41) inner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023003821.0U CN214112284U (en) | 2020-12-11 | 2020-12-11 | Electric heavy-load wet-type brake drive axle with super-large speed ratio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023003821.0U CN214112284U (en) | 2020-12-11 | 2020-12-11 | Electric heavy-load wet-type brake drive axle with super-large speed ratio |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214112284U true CN214112284U (en) | 2021-09-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023003821.0U Active CN214112284U (en) | 2020-12-11 | 2020-12-11 | Electric heavy-load wet-type brake drive axle with super-large speed ratio |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214112284U (en) |
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2020
- 2020-12-11 CN CN202023003821.0U patent/CN214112284U/en active Active
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