CN218577414U - Drive axle assembly and tractor - Google Patents

Abstract

The utility model relates to a drive axle assembly and a tractor, comprising an input gear shaft, a power input gear, a differential and two final drives, the two final drives are relatively installed at both ends of the differential, and are respectively connected to Differential transmission connection; the power input gear is fixedly sleeved on the differential, and the input gear shaft is installed on one side of the differential, meshing with the power input gear, and it can rotate around its own axis to drive the power input The gears turn. The utility model has the beneficial effects of compact structure, reasonable design, rapid transmission of power, and the integration of the service brake and the parking brake, which is convenient to use; in addition, it has few components, occupies a small space, and is convenient to arrange.

Description

Drive axle assembly and tractor

technical field

The utility model relates to the technical field of tractors, in particular to a drive axle assembly and a tractor.

Background technique

The rear drive axle of domestic tractors generally includes central transmission, left and right brake assemblies, left and right final drives, auxiliary transmission, shuttle gear assembly, etc. are also installed in the rear axle housing. The power is input from the input gear shaft of the central transmission, transmitted to the half shaft gear of the final drive through the differential, decelerated and increased by the final drive assembly, and the power is transmitted to the wheels to drive the tractor. When the brake is working, the left and right side shaft gears are braked to achieve braking deceleration. The parking brake is generally located at the input gear shaft of the central transmission.

When the existing tractor rear drive axle is applied to a high-horsepower tractor, it requires a large layout space, requires two sets of brake assemblies, and the parking brake and the service brake are independent, with many components and high cost.

Utility model content

The technical problem to be solved by the utility model is to provide a driving axle assembly and a tractor, aiming at solving the problems in the prior art.

The technical scheme that the utility model solves the problems of the technologies described above is as follows:

A drive axle assembly, including an input gear shaft, a power input gear, a differential and two final drives, the two final drives are installed at opposite ends of the differential, and are respectively connected to the Differential transmission connection; the power input gear is fixedly sleeved on the differential, the input gear shaft is installed on one side of the differential, and it meshes with the power input gear, and it can Rotate around its own axis to drive the power input gear to rotate.

The beneficial effect of the utility model is: when working, the power is input by the input gear shaft, and is transmitted to the differential by the power input gear, and then transmitted to the two final drives by the differential, and then transmitted by the two final drives To the equipment that needs power, the power transmission is convenient.

The utility model is compact in structure, reasonable in design, realizes fast transmission of power, and is convenient to use; in addition, it has few components, occupies a small space, and is convenient to arrange.

On the basis of the above technical solutions, the utility model can also be improved as follows.

Further, the differential includes a differential housing, a differential transmission mechanism and two sun gear shafts, the two sun gear shafts are arranged opposite to each other, they are respectively perpendicular to the axial direction of the input gear shaft and can respectively rotate around The axial rotation of itself, and its ends far away from each other are respectively connected to the two final drives; The axial rotation of the sun gear shaft, the power input gear is fixedly sleeved outside the differential case; the differential transmission mechanism is installed in the differential case, which can follow the differential case The body rotates, and it is connected by transmission with one end of the two sun gear shafts that are close to each other.

The beneficial effect of adopting the above further solution is that during operation, the power is input from the input gear shaft and transmitted to the differential case by the power input gear, so that the differential case rotates; then, the differential case is transmitted through the differential The mechanism respectively drives the two sun gear shafts to rotate, and the two sun gear shafts respectively drive the two final drives to rotate, and finally the two final drives transmit the power to the equipment that needs power. The power transmission is convenient, the structure is compact, and the space occupied is small.

Further, each of the final drives includes a drive shaft, a ring gear and a planetary mechanism, and each of the drive shafts is installed at one end corresponding to the sun gear shaft outside the differential case, and is connected to the sun gear shaft Parallel, and it can rotate around its own axial direction; the ring gear is coaxial with the drive shaft and fixedly arranged, and it is located outside the end of the drive shaft close to the corresponding sun gear shaft; the planetary mechanism is installed on the One end of the drive shaft close to the sun gear shaft is engaged with the ring gear and the sun gear shaft respectively.

The beneficial effect of adopting the above further solution is that during operation, the power is input from the input gear shaft and transmitted to the differential case by the power input gear, so that the differential case rotates; then, the differential case is transmitted through the differential The mechanism drives the two sun gear shafts to rotate respectively, and the two sun gear shafts drive the two drive shafts to rotate through the planetary mechanism and the ring gear respectively, and finally the two drive shafts transmit the power to the equipment that needs power. The power transmission is convenient, the structure is compact, and the space occupied is small. .

Further, the differential transmission mechanism includes a long planetary shaft and two short planetary shafts, the long planetary shafts are detachably installed in the differential housing, and a through hole is provided at the center of the two short planetary shafts; The short planetary shafts are relatively detachably installed in the differential case, they are respectively distributed perpendicular to the long planetary shafts, and their opposite ends respectively pass through the two ends of the through holes and extend to the through holes Inside; the long planetary gear shafts are respectively perpendicular to the axial direction of the sun gear shaft, and the two ends of the planetary gears are respectively coaxially rotated through needle bearings; the two ends of the sun gear shafts that are close to each other are respectively coaxial The fixed sleeve is provided with a left side gear and a right side gear, and the left side gear and the right side gear mesh with the four planetary gears respectively.

The beneficial effect of adopting the above further scheme is that during operation, the power is input from the differential case, so that the differential case rotates around its center line; The short planetary shaft revolves around the center line of the differential housing to realize power transmission; the long planetary shaft and the two short planetary shafts drive multiple planetary gears to revolve during the revolution, and the multiple planetary gears drive the left half shaft respectively The gear and the right half shaft gear rotate, thereby driving the two sun gear shafts to rotate, and realizing the power transmission to the two sun gear shafts;

In this scheme, the installation between the long planetary shaft and the two short planetary shafts is convenient for disassembly and assembly, which improves the convenience of installation and disassembly of the entire differential and the reliability of work, and is suitable for differential work with large horsepower. .

Further, the differential further includes a clutch, which is installed in the differential case, and is used to couple or separate the differential case and the left side gear or the right side shaft gear.

The beneficial effect of adopting the above further solution is that during operation, the clutch can make the differential case and the left side gear or the right side gear be combined or separated, so as to realize the same speed transmission or differential transmission of the drive shafts on both sides.

Further, an integrated brake is also included, the integrated brake is installed on one side of the differential case, and is in drive connection with the differential case, and is used for braking the differential case.

The beneficial effect of adopting the above further solution is that during the operation process, the differential case is braked through the integrated brake to realize driving braking and parking braking, and the braking is convenient.

Further, the integrated brake includes a brake housing, a friction plate assembly, a service brake mechanism, and a parking brake mechanism. The brake housing is fixed and located outside one end of the differential housing, and one end There are openings through the inside and outside;

The friction plate assembly is installed in the brake housing, its inner side is connected with the differential case through an inner spline, and its outer side is connected with the brake housing through an outer spline; the service brake mechanism and the parking brake mechanism are respectively installed in the brake housing, which are respectively located at both ends of the friction plate assembly, and the service brake mechanism is used to squeeze or loosen the friction plate assembly For service braking, the parking brake mechanism is used to squeeze or loosen the friction plate assembly for parking braking.

The beneficial effect of adopting the above further solution is that during operation, on the one hand, the friction plate assembly can be squeezed or loosened by the service brake mechanism to perform service brake; on the other hand, the friction plate assembly can be squeezed by the parking brake mechanism Or loosen the friction plate assembly to perform parking brake. It has a simple structure and reasonable design. It integrates the service brake and parking brake. It has a compact structure, convenient braking, and a small number of components, which reduces the layout space and reduces the costs.

Further, the service brake mechanism includes a service brake piston, one end of the service brake piston is installed in the brake housing, which can reciprocate along the direction from one end to the other end of the brake housing to squeeze or Loosen the friction plate assembly.

The beneficial effect of adopting the above-mentioned further solution is that during operation, the service brake piston can be reciprocated in the brake housing in a way that those skilled in the art can think of, and the friction plate assembly can be squeezed or loosened, so as to realize the service brake. Easy to move.

Further, the parking brake mechanism includes a parking brake piston, the other end of the parking brake piston is installed in the brake housing, and it can reciprocate along the direction from one end to the other end of the brake housing to squeeze or loosen the friction plate assembly.

The beneficial effect of adopting the above-mentioned further solution is that during operation, the parking brake piston can be reciprocated in the brake housing in a way that those skilled in the art can think of, and the friction plate assembly can be squeezed or loosened, so as to realize the parking brake. , Braking is convenient.

The utility model also relates to a tractor, comprising the drive axle assembly as described above.

The beneficial effect of adopting the above-mentioned further solution is that the utility model provides a tractor, which has a compact structure and a reasonable design, realizes rapid power transmission, and integrates the driving brake and the parking brake into one body, making it easy to use; in addition, Less components, small space occupation, convenient layout.

Description of drawings

Fig. 1 is the overall structural representation of the utility model;

Fig. 2 is the sectional view of A-A direction in Fig. 1;

Fig. 3 is a partial structural representation of the utility model;

Fig. 4 is the structural representation of final driver in the utility model;

Fig. 5 is the sectional view of B-B direction in Fig. 4;

Figure 6 is a schematic diagram of the overall structure of the differential in the utility model;

Fig. 7 is a partial structural schematic diagram of the differential in the utility model;

Figure 8 is a schematic diagram of the internal structure of the utility model;

Fig. 9 is a sectional view of C-C direction in Fig. 8;

Fig. 10 is a structural schematic diagram of the integrated brake in the utility model;

Fig. 11 is a schematic diagram of the internal structure of the integrated brake in the utility model.

In the accompanying drawings, the list of parts represented by each label is as follows:

1. Input gear shaft; 2. Power input gear; 3. Differential case; 4. Sun gear shaft; 5. Long planetary gear shaft; 6. Short planetary gear shaft; 7. Planetary gear; 8. Left side shaft gear; 9 10. Clutch; 11. Drive shaft; 12. Ring gear; 13. Brake housing; 14. Friction plate assembly; 15. Service brake piston; 16. Parking brake piston; 17. 18, planet carrier; 19, planetary gear one; 20, planetary gear two; 21, planetary gear shaft; 22, shell; 23, parking brake seat; 24, return spring.

Detailed ways

It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

In describing the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention. Novel and simplified descriptions do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the utility model. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, a feature defined as "first", "second", etc. may expressly or implicitly include one or more of that feature. In the description of the present utility model, unless otherwise specified, "plurality" means two or more.

In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a flexible connection. Detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention through specific situations.

The utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

Example 1

As shown in Figures 1 to 11, this embodiment provides a drive axle assembly, including an input gear shaft 1, a power input gear 2, a differential and two final drives, and the two final drives are relatively installed on the differential The two ends of the transmission are respectively connected to the differential transmission; the power input gear 2 is fixedly sleeved on the differential, and the input gear shaft 1 is installed on one side of the differential, which meshes with the power input gear 2, and It can rotate around its own axis to drive the power input gear 2 to rotate.

During operation, the power is input by the input gear shaft 1, and transmitted to the differential by the power input gear 2, and then transmitted to the two final drives by the differential, and then transmitted to the equipment requiring power by the two final drives, Power transmission is convenient.

Preferably, this embodiment also includes a main casing 17, which is covered outside the differential, and its two ends are open, and are respectively fixedly connected with the two final drives by bolts.

In addition, one side of the main casing 17 is provided with an opening, and one end of the input gear shaft 1 passes through the opening and extends out of the main casing 17 for connecting power equipment.

This embodiment has a compact structure, reasonable design, fast transmission of power, and convenient use; in addition, it has fewer components, occupies less space, and is convenient for layout.

Example 2

On the basis of Embodiment 1, in this embodiment, the differential includes a differential housing 3, a differential transmission mechanism and two sun gear shafts 4, and the two sun gear shafts 4 are arranged oppositely, which are respectively perpendicular to the input gear shaft 1 is arranged in the axial direction and can rotate around its own axial direction, and its ends far away from each other are respectively connected to the two final drives; the differential case 3 is sleeved outside the ends of the two sun gear shafts 4 that are close to each other , which can rotate around the axial direction of the sun gear shaft 4, and the power input gear 2 is fixedly sleeved outside the differential case 3; the differential transmission mechanism is installed in the differential case 3, which can follow the differential case 3 rotates, and it is connected with the transmission of one end of two sun gear shafts 4 that are close to each other.

During operation, the power is input by the input gear shaft 1, and is transmitted to the differential case 3 by the power input gear 2, so that the differential case 3 rotates; then, the differential case 3 is respectively driven by the differential transmission mechanism The two sun gear shafts 4 rotate, and the two sun gear shafts 4 respectively drive the two final drives to rotate, and finally the two final drives transmit the power to the equipment that needs power. The power transmission is convenient, the structure is compact, and the space occupied is small.

Example 3

On the basis of Embodiment 2, in this embodiment, each final drive includes a drive shaft 11, a ring gear 12 and a planetary mechanism, and each drive shaft 11 is installed on the corresponding sun gear shaft 4 outside the differential case 3 One end of which is parallel to the sun gear shaft 4, and it can rotate around its own axis; the ring gear 12 is coaxial with the drive shaft 11 and is fixedly arranged, and it is located outside the end of the drive shaft 11 close to the corresponding sun gear shaft 4; the planetary mechanism is installed On the end of the drive shaft 11 close to the sun gear shaft 4 , it meshes with the ring gear 12 and the sun gear shaft 4 respectively.

During operation, the power is input by the input gear shaft 1, and is transmitted to the differential case 3 by the power input gear 2, so that the differential case 3 rotates; then, the differential case 3 is respectively driven by the differential transmission mechanism The two sun gear shafts 4 rotate, and the two sun gear shafts 4 respectively drive the two drive shafts 11 to rotate through the planetary mechanism and the ring gear 12, and finally the two drive shafts 11 transmit the power to the equipment that needs power. The power transmission is convenient, the structure is compact, and the occupation Small space.

Preferably, in this embodiment, the planetary mechanism includes a planetary carrier 18 and a plurality of planetary gear assemblies, and the planetary carrier 18 is fixedly mounted on one end of the drive shaft 11; a plurality of planetary gear assemblies are evenly spaced along the circumference of the drive shaft 11 and can be The rotating one is mounted on the planet carrier 18, which meshes with the sun gear shaft 4 and the ring gear 12 respectively. During operation, the power is input from the sun gear shaft 4, and the sun gear shaft 4 utilizes the meshing force between itself and the multiple planetary gear assemblies to drive the multiple planetary gear assemblies to rotate; at the same time, the ring gear 12 is fixed, and the ring gear 12 utilizes it and the multiple planetary gear assemblies to rotate. The meshing force between the planetary gear assemblies drives multiple planetary gear assemblies to revolve, thereby driving the planetary carrier 18 and the drive shaft 11 to rotate, realizing fast power transmission, convenient power transmission, large transmission ratio, and small space occupation.

Preferably, in this embodiment, the above-mentioned planetary carrier 18 has an annular structure, which is coaxially and fixedly sleeved on the drive shaft 11 through a spline; in addition, the planetary carrier 18 is a structure with one end thick and the other end thin, and its thin end Close to the sun gear axis 4.

Preferably, in this embodiment, each planetary gear assembly includes a planetary gear one 19 and a planetary gear two 20, and a plurality of planetary gear shafts 21 corresponding to the planetary gear assemblies one-to-one are fixedly installed on the planet carrier 18, and the planetary gears The shaft 21 is parallel to the drive shaft 11; the first planetary gear 19 and the second planetary gear 20 are respectively sleeved on the planetary gear shaft 21 to rotate coaxially, and their ends close to each other are fixedly connected; the first planetary gear 19 meshes with the sun gear shaft 1, and the planetary gear The second gear 20 meshes with the ring gear 12 . During operation, the power is input by the sun gear shaft 4, and the sun gear shaft 4 utilizes the meshing force between itself and a plurality of planetary gears 19 to respectively drive a plurality of planetary gears 19 and a plurality of planetary gears 20 to rotate; at the same time, the ring gear 12 fixed, and the ring gear 12 utilizes the meshing force between it and a plurality of planetary gears 20 to drive a plurality of planetary gears 19 and a plurality of planetary gears 20 to revolve, thereby driving the planet carrier 18 and the drive shaft 11 to rotate, realizing power Fast transmission, convenient power transmission, large transmission ratio, and small footprint.

In addition, the outer diameter of the first planetary gear 19 is larger than the outer diameter of the second planetary gear 20. This scheme has simple structure, reasonable design, convenient layout, and is conducive to the meshing between the first planetary gear 19 and the sun gear shaft 1 and the engagement between the second planetary gear 20 and the teeth. Engagement of ring 12.

Moreover, a plurality of first planetary gears 19 are respectively located outside the ring gear 12 , and a plurality of second planetary gears 20 are respectively located inside the ring gear 12 .

Preferably, in this embodiment, each final drive further includes a housing 22, and both ends of the housing 22 are open; the drive shaft 11 is rotatably installed in the housing 22 along the direction from one end of the housing to the other end, and one end extends One end of the casing 22 is close to one end of the sun gear shaft 4 , and the other end extends outside the other end of the casing 22 ; the ring gear 12 is fixedly mounted on one end of the casing 22 .

In addition, the housing 22 is thick at one end and thin at the other end, which is convenient for installing the ring gear 12 and the drive shaft 11 .

Example 4

On the basis of any one of Embodiment 2 to Embodiment 3, in this embodiment, the differential transmission mechanism includes a long planetary shaft 5 and two short planetary shafts 6, and the long planetary shaft 5 is detachably mounted on the differential case Inside the body 3, a through hole is provided at the center; two short planetary gear shafts 6 are relatively detachably installed in the differential case 3, which are respectively distributed perpendicular to the long planetary gear shafts 5, and their opposite ends respectively pass through Pass through the two ends of the through hole and extend into the through hole; the long planetary gear shaft 5 is respectively perpendicular to the axial direction of the sun gear shaft 4, and the two ends of the planetary gear 7 are coaxially rotated through needle bearings respectively; the two sun gear shafts 4. A left side gear 8 and a right side gear 9 are respectively coaxially fixed on one end close to each other, and the left side gear 8 and the right side gear 9 mesh with the four planetary gears 7 respectively.

During operation, the power is input from the differential case 3, so that the differential case 3 rotates around its center line; during the rotation of the differential case 3, the long planetary shaft 5 and the two short planetary shafts 6 can be driven respectively. Revolving around the centerline of the differential case 3 to realize power transmission; the long planetary shaft 5 and the two short planetary shafts 6 respectively drive a plurality of planetary gears 7 to revolve during the revolution, and the plurality of planetary gears 7 respectively drive the left The side gear 8 and the right side gear 9 rotate, thereby driving the two sun gear shafts 4 to rotate, so as to transmit power to the two sun gear shafts 4;

In this scheme, the installation between the long planetary wheel shaft 5 and the two short planetary wheel shafts 6 is convenient for disassembly and assembly, which improves the convenience of installation and disassembly of the entire differential and the reliability of work, and is suitable for differentials with large horsepower. machine work.

Preferably, in this embodiment, the long planetary shaft 5 is located between the corresponding two planetary gears 7 and the through hole and/or the two short planetary shafts 6 are located between the corresponding two planetary gears 7 and the through hole The coaxial fixed sleeve is respectively provided with a long spacer sleeve. The scheme is simple in structure and reasonable in design, and the stability of the needle roller bearing can be increased through the long spacer, preventing each planetary gear 7 from moving on the corresponding shaft.

In addition, the two ends of the long planetary shaft 5 are located between the corresponding two planetary gears 7 and the differential case 3 and/or the two ends of the two short planetary shafts 6 are located between the corresponding two planetary gears 7 and the differential case. The parts between the housings 3 are respectively coaxially fixed sleeves with needle roller bearing spacers. The scheme is simple in structure and reasonable in design, and the stability of the needle bearing can be increased through the spacer of the needle bearing, preventing each planetary gear 7 from shifting on the corresponding shaft.

Moreover, the two ends of the long planetary shaft 5 are located between the corresponding two needle bearing spacers and the differential case 3 and/or the two ends of the two short planetary shafts 6 are located between the corresponding two needle bearing spacers. The positions between the differential case 3 and the differential case 3 are respectively coaxially fixedly sleeved with anti-rotation bearing bushes. The scheme is simple in structure and reasonable in design, and the wear of the differential case 3 can be effectively prevented through the anti-rotation bearing bush, and the machined surface quality of the differential case 3 is reduced.

Example 5

On the basis of Embodiment 4, in this embodiment, the differential further includes a clutch 10, which is installed in the differential case 3, and is used to couple or separate the differential case 3 and the left side gear 8 or right side shaft gear 9.

During operation, the differential case 3 and the left side gear 8 or the right side gear 9 can be combined or separated through the clutch 10, thereby realizing the same-speed transmission or differential transmission of the drive shafts on both sides.

Preferably, in this embodiment, the above-mentioned clutch is a friction plate clutch, and the friction plate clutch is installed in the differential case 3, which includes a driving member, a plurality of annular steel plates and a plurality of annular friction plates, and a plurality of steel plates The friction plates and a plurality of friction plates are coaxially sleeved on any one of the sun gear shafts 4 sequentially; Rotate, and it can move along the centerline of the differential case 3; the inner side of multiple friction plates is connected with the left side gear 8 or the right side gear 9 through splines, and it can follow the left side gear 8 or the right side gear The side gear 9 rotates together, and it can move in the axial direction of the left side gear 8 or the right side gear 9;

The driving member is installed in the differential case 3, and it is connected with the steel sheet at the end, and is used to squeeze a plurality of steel sheets and a plurality of friction sheets to make them close to each other, or loosen a plurality of steel sheets and Multiple friction plates separate them from each other.

When the vehicle is running, a plurality of steel plates and a plurality of friction plates are released through the driving parts to separate them from each other. At this time, the left side gear 8 and the right side gear 9 rotate respectively, thereby realizing the differential transmission of power;

When braking, a plurality of steel sheets one and a plurality of steel sheets two are driven by the driving parts to make them close to each other. At this time, the left side shaft gear 8 and the right side shaft gear 9 respectively revolve together with the differential case 3, and cannot Autorotation, so that the left and right side shaft gears rotate at the same speed.

Preferably, in this embodiment, the specific structure and operating principle of the above-mentioned driving member are as follows:

The driving member is an annular drive ring, and an annular protrusion is arranged in the differential case 3, and the annular protrusion is located at one end of a plurality of steel plates and a plurality of friction plates, which is close to one end of a plurality of steel plates and a plurality of friction plates An annular oil chamber is provided, and an oil port communicating with the annular oil chamber is provided on the differential case 3, and one end of the annular oil chamber is open close to a plurality of steel plates and a plurality of friction plates;

The drive ring is movably installed in the annular oil chamber, and its edge is close to the wall of the annular oil chamber, and it can move in the annular oil chamber until one end extends out of the annular oil chamber and pushes multiple steel sheets and multiple The friction plates move against each other.

In addition, the inner and outer sides of the drive ring are respectively provided with annular sealing grooves, and sealing rings are respectively installed in the two annular sealing grooves, and the sealing rings are close to the wall of the annular oil chamber. The structure is simple, the design is reasonable, and the sealing is realized.

When working, through the way that those skilled in the art can think of, for example, the oil pump communicates with the oil port through the pipeline, and the oil is sent into the area between the corresponding drive ring and the bottom of the annular oil chamber through the oil pump; the pressure oil Push the drive ring to move and squeeze multiple steel sheets and multiple friction plates, so that the drive multiple steel plates and multiple friction plates are close to each other; after stopping the injection of pressure oil, the drive ring returns under the action of inertial force, so that Multiple steel plates and multiple friction plates are separated from each other.

Example 6

On the basis of any one of Embodiment 2 to Embodiment 5, this embodiment also includes an integrated brake, the integrated brake is installed on one side of the differential case 3, and is connected with the differential case 3 in transmission, for The differential case 3 is braked.

During operation, the differential case 3 is braked through the integrated brake to realize service braking and parking braking, and the braking is convenient.

Example 7

On the basis of Embodiment 6, in this embodiment, the integrated brake includes a brake housing 13, a friction plate assembly 14, a service brake mechanism and a parking brake mechanism, and the brake housing 13 is fixed and located at the differential One end of the shell 3 is outside, and one end is provided with an opening that penetrates inside and outside;

The friction plate assembly 14 is installed in the brake housing 13, its inner side is connected with the differential case 3 through an inner spline, and its outer side is connected with the brake housing 13 through an outer spline; the service brake mechanism and the parking brake The driving mechanism is respectively installed in the brake housing 13, which are respectively located at both ends of the friction plate assembly 14, the service brake mechanism is used to squeeze or loosen the friction plate assembly 14 for service braking, and the parking brake mechanism Used to squeeze or loosen the friction plate assembly 14 for parking brake.

During operation, on the one hand, the friction plate assembly 14 can be squeezed or loosened by the service brake mechanism for service braking; on the other hand, the friction plate assembly can be squeezed or loosened by the parking brake mechanism 14 to perform parking brake, simple structure, reasonable design, integrating service brake and parking brake, compact structure, convenient braking, less number of components, reduced layout space and reduced cost.

It should be noted that the above-mentioned friction plate assembly 14 adopts the prior art, and its specific structure and principle will not be repeated here.

Example 8

On the basis of Embodiment 7, in this embodiment, the service brake mechanism includes a service brake piston 15, and the service brake piston 15 is installed at one end of the brake housing 13, which can be moved from one end to the other end of the brake housing 13. Move back and forth in the direction to squeeze or loosen the friction plate assembly 14.

During operation, the service brake piston 15 is reciprocated in the brake housing 13 in a manner conceivable by those skilled in the art, and the friction plate assembly 14 is squeezed or loosened, so as to realize service brake and brake conveniently.

Preferably, in this embodiment, the other end of the brake housing 13 is provided with an annular groove, and the service brake piston 15 has a structure with one end thick and the other end thin, and its thick end abuts against the friction plate assembly 14, and its thin end The end extends into the annular groove and forms a service brake oil cavity with the annular groove; the brake housing 13 is provided with a service brake oil port communicating with the service brake oil cavity.

During operation, inject pressure oil from the service brake oil port into the service brake oil chamber in a way that those skilled in the art can think of, use the pressure oil to push the service brake piston 15 in the brake housing 13 and squeeze the friction plate Assembly 14, so that multiple friction plates and multiple spacers are in close contact to realize service braking. At this time, the differential case 3 cannot rotate; after the injection of pressure oil is stopped, the friction plate assembly 14 gradually returns to Position to loosen the friction plate assembly 14, so that a plurality of spacers and a plurality of friction plates are separated from each other, and the service brake is stopped. At this time, the differential case 2 can rotate, and the braking is convenient.

In addition, the service brake oil port communicates with one end of the service brake oil pipe, and the other end of the service brake oil pipe is used to connect to the oil supply equipment. The scheme is simple in structure and reasonable in design, and the pressure oil is injected into the service brake oil cavity from the service brake oil port through the oil supply equipment and the service brake oil pipe, and the injection is convenient.

The above-mentioned fuel supply equipment adopts the prior art, for example, it includes a fuel tank, the bottom of which is communicated with the other end of the service brake oil pipe, and an oil pump is fixedly installed on the service brake oil pipe.

Example 9

On the basis of any one of Embodiment 7 to Embodiment 8, in this embodiment, the parking brake mechanism includes a parking brake piston 16, and the other end of the parking brake piston 16 is installed in the brake housing 13, It can move back and forth along the direction from one end of the brake housing 13 to the other end to squeeze or loosen the friction plate assembly 14 .

During operation, the parking brake piston 16 reciprocates in the brake housing 13 in a way that those skilled in the art can think of, and squeezes or loosens the friction plate assembly 14, so as to realize the parking brake and brake conveniently. .

Preferably, in this embodiment, the parking brake piston 16 is thick on the outside and thin on the inside, with steps provided on the thick side; the outer surface of the thick side of the parking brake piston 16 is in close contact with the inner wall of the brake housing 13 , the inner surface of the thin side is attached to the differential case 3, and the end away from the opening is in contact with the friction plate assembly 14;

A parking brake seat 23 is fixedly installed on the brake housing 13, the inner side of the parking brake seat 23 extends into the brake housing 13 and abuts against the step, and it rubs against the thick side of the parking brake piston 16 A parking oil cavity is formed between one end of the plate assembly 14, and a parking brake oil port communicating with the parking brake oil cavity is provided on the brake housing 13; a return spring 24 is also installed in the brake housing 13, The return spring 24 abuts against the end of the parking brake piston 16 away from the friction plate assembly 14 .

During operation, when the pressure oil is not injected into the parking brake oil chamber, the friction plate assembly 14 is pressed against the friction plate assembly 14 under the elastic force of the return spring 24, so that multiple friction plates and multiple spacers close to the parking brake, and the differential housing 3 cannot rotate at this time; when the pressure oil is injected into the parking brake oil chamber, the pressure oil pushes the parking brake piston 16 to loosen the friction plate assembly 14, so that multiple friction plates and multiple spacers are separated from each other, and the return spring 24 is squeezed at the same time, and the parking brake is stopped. At this time, the differential case 3 can rotate, and the brake is convenient.

In addition, the parking brake oil port communicates with one end of the parking brake oil pipe, and the other end of the parking brake oil pipe is used to connect with oil supply equipment. The scheme is simple in structure and reasonable in design, and the pressure oil is injected into the parking brake oil cavity from the parking brake oil port through the oil supply equipment and the parking brake oil pipe, and the injection is convenient.

The above-mentioned oil supply equipment adopts the prior art, for example, it includes a fuel tank, the bottom of which communicates with the other end of the parking brake oil pipe, and an oil pump is fixedly installed on the parking brake oil pipe.

Example 10

On the basis of the above embodiments, this embodiment also provides a tractor, including the drive axle assembly as described above.

This embodiment provides a tractor, the tractor is compact in structure, reasonable in design, realizes rapid transmission of power, and it integrates the service brake and parking brake into one, which is convenient to use; convenient.

The working principle of the utility model is as follows:

During operation, the power is input by the input gear shaft 1 and transmitted to the differential case 3 by the power input gear 2, so that the differential case 3 rotates; the differential case 3 rotates around its center line; the differential During the rotation of the transmission case 3, the long planetary shaft 5 and the two short planetary shafts 6 can be driven to revolve around the centerline of the differential case 3 to realize power transmission; the long planetary shaft 5 and the two short planetary shafts 6 In the process of revolution, a plurality of planetary gears 7 are respectively driven to revolve, and the plurality of planetary gears 7 respectively drive the left side gear 8 and the right side gear 9 to rotate, thereby driving the two sun gear shafts 4 to rotate, so as to realize power transmission to the two Sun gear shaft 4;

The sun gear shaft 4 utilizes the meshing force between itself and a plurality of planetary gears 19 to respectively drive a plurality of planetary gears 19 and a plurality of planetary gears 20 to rotate; meanwhile, the ring gear 12 is fixed, and the ring gear 12 utilizes it and the plurality of planetary gears to rotate. The meshing force between two planetary gears 20 drives a plurality of planetary gears 19 and a plurality of planetary gears 20 to revolve, thereby driving the planetary carrier 18 and the drive shaft 11 to rotate, realizing fast transmission of power and convenient power transmission;

When the vehicle is running, pressure oil is injected into the parking brake oil chamber, and at this time, the pressure oil pushes the parking brake piston 16 to loosen the friction plate assembly 14, so that multiple friction plates and multiple spacers are separated from each other and squeezed simultaneously. Return spring 24, the parking brake is released, and the differential case 3 can rotate at this time, so as to realize the transmission of power. When the vehicle is running, the parking brake oil cavity is always filled with pressure oil;

When braking while the vehicle is running, pressure oil is injected into the service brake oil chamber, and the friction plate assembly 14 is pressed against the friction plate assembly 14 under the action of the service brake piston 15, so that multiple friction plates and multiple spacers Clinging to realize service braking, the differential housing 3 cannot rotate at this time; at the same time, the differential lock clutch 10 is injected with pressure oil, and the clutch 10 works. At this time, the left side gear 8 and the right side gear 9 follow the differential The housing 3 revolves together and cannot be self-transmitted, so as to achieve braking;

When the pressure oil is not injected into the parking brake oil chamber, the friction plate assembly 14 is pressed against the friction plate assembly 14 under the elastic force of the return spring 24, so that multiple friction plates and multiple spacers are in close contact, Parking brake is realized, and the differential housing 3 cannot rotate at this time; when the pressure oil is injected into the parking brake oil chamber, the pressure oil pushes the parking brake piston 16 to loosen the friction plate assembly 14 at this time, so that A plurality of friction plates and a plurality of spacers are separated from each other, and the return spring 24 is squeezed at the same time, and the parking brake is released. At this time, the differential case 3 can rotate, and the braking is convenient.

In addition, the parking brake oil port communicates with one end of the parking brake oil pipe, and the other end of the parking brake oil pipe is used to connect with oil supply equipment. The scheme is simple in structure and reasonable in design, and the pressure oil is injected into the parking brake oil cavity from the parking brake oil port through the oil supply equipment and the parking brake oil pipe, and the injection is convenient.

It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from all points of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to fall within the scope of the claims All changes within the meaning and range of equivalents of the required elements are included in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (10)

1. A drive axle assembly, characterized in that it includes an input gear shaft (1), a power input gear (2), a differential and two final drives, and the two final drives are relatively installed on the The two ends of the differential are respectively connected to the differential; the power input gear (2) is fixedly sleeved on the differential, and the input gear shaft (1) is installed on the differential One side of the gearbox, which meshes with the power input gear (2), and can rotate around its own axis to drive the power input gear (2) to rotate. 2. The drive axle assembly according to claim 1, characterized in that: the differential includes a differential housing (3), a differential transmission mechanism and two sun gear shafts (4), the two The sun gear shafts (4) are arranged opposite to each other, they are respectively arranged perpendicular to the axial direction of the input gear shaft (1) and can rotate around their own axial directions, and their ends far away from each other are respectively connected to the two final drives. connection; the differential housing (3) is sheathed outside the two ends of the sun gear shafts (4) that are close to each other, and it can rotate around the axial direction of the sun gear shafts (4), and the power input gear (2) The fixed sleeve is arranged outside the differential case (3); the differential transmission mechanism is installed in the differential case (3), and it can follow the differential case ( 3) to rotate, and it is connected in drive with one end of the two sun gear shafts (4) that are close to each other. 3. The drive axle assembly according to claim 2, characterized in that: each said final drive comprises a drive shaft (11), a ring gear (12) and a planetary mechanism, and each said drive shaft (11 ) is installed on one end corresponding to the sun gear shaft (4) outside the differential case (3), parallel to the sun gear shaft (4), and can rotate around its own axis; the gear The ring (12) is coaxial with the drive shaft (11) and fixedly arranged, and it is located outside the end of the drive shaft (11) close to the corresponding sun gear shaft (4); the planetary mechanism is installed on the drive shaft (11) One end close to the sun gear shaft (4), which meshes with the ring gear (12) and the sun gear shaft (4) respectively. 4. The drive axle assembly according to claim 2, characterized in that: the differential transmission mechanism includes a long planetary shaft (5) and two short planetary shafts (6), and the long planetary shaft (5) can be It is detachably installed in the differential case (3), and a through hole is provided at its center; the two short planetary axles (6) are relatively detachably installed in the differential case ( 3), which are respectively distributed perpendicular to the long planet wheel shafts (5), and their opposite ends respectively pass through the two ends of the through hole and extend into the through hole; the long planet wheel shafts (5) are respectively Perpendicular to the axial direction of the sun gear shaft (4), planetary gears (7) are set at both ends of which rotate coaxially through needle bearings; The shaft fixing sleeve is provided with a left side gear (8) and a right side gear (9), and the left side gear (8) and the right side gear (9) are connected with the four planetary gears (7) respectively. ) to engage. 5. The drive axle assembly according to claim 4, characterized in that: the differential further comprises a clutch (10), the clutch (10) is installed in the differential housing (3), It is used to couple or separate the differential case (3) and the left side gear (8) or the right side gear (9). 6. The drive axle assembly according to claim 2, characterized in that: it also includes an integrated brake, the integrated brake is installed on one side of the differential case (3), and is connected with the differential The casing (3) is connected in transmission, and is used for braking the differential casing (3). 7. The drive axle assembly according to claim 6, characterized in that: the integrated brake includes a brake housing (13), a friction plate assembly (14), a service brake mechanism and a parking brake mechanism, the The brake housing (13) is fixedly arranged, and it is located outside one end of the differential housing (3), and one end is provided with an opening that penetrates inside and outside; The friction plate assembly (14) is installed in the brake housing (13), its inner side is connected to the differential case (3) through an inner spline, and its outer side is connected to the differential housing (3) through an outer spline. The brake housing (13) is connected; the service brake mechanism and the parking brake mechanism are respectively installed in the brake housing (13), which are respectively located at both ends of the friction plate assembly (14) , the service brake mechanism is used to squeeze or loosen the friction plate assembly (14) for service braking, and the parking brake mechanism is used to squeeze or loosen the friction plate assembly ( 14) to apply the parking brake. 8. The drive axle assembly according to claim 7, characterized in that: the service brake mechanism includes a service brake piston (15), and the service brake piston (15) is installed in the brake housing ( 13), which can reciprocate along the direction from one end to the other end of the brake housing (13) to squeeze or loosen the friction plate assembly (14). 9. The drive axle assembly according to claim 7 or 8, characterized in that: the parking brake mechanism includes a parking brake piston (16), and the parking brake piston (16) is installed on the The other end in the brake housing (13), which can move back and forth along the direction from one end to the other end of the brake housing (13) to squeeze or loosen the friction plate assembly (14). 10. A tractor, characterized by comprising the drive axle assembly according to any one of claims 1-9.

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