Rear axle housing assembly and tractor

Abstract

The utility model relates to a rear axle shell assembly and a tractor, the rear axle shell assembly comprises a rear axle shell, a gear system is installed in the rear axle shell, and the gear system comprises a power take-off port gear transmission system and a transfer case gear transmission system; the power take-off port gear transmission system comprises a double pump input shaft, a double pump idler shaft and a double pump driven gear shaft which are fixedly installed in the rear axle shell, and power take-off port transmission gears which are sequentially connected in a meshed mode are installed on the shafts respectively. The transfer case gear transmission system comprises a transfer case input shaft and a transfer case idler shaft which are fixedly installed in the rear axle shell, and transfer case transmission gears which are connected in a meshed mode are installed on the shafts respectively. According to the utility model, the integration degree is high, the assembly structure is simplified, the size and the occupied space of equipment are reduced, and the equipment cost is further reduced.

Description

Technical Field

[0001] This application relates to the field of tractor technology, and more specifically, to a rear axle housing assembly and a tractor. Background Technology

[0002] The transmission structure of existing tractors includes a power take-off gear and a transfer case gear, which are respectively installed in the power take-off gear housing and the transfer case housing. The equipment structure is complex and has low integration.

[0003] The simultaneous installation of the power take-off gear housing and the transfer case housing occupies a large amount of space and increases equipment costs. Utility Model Content

[0004] The purpose of this application is to provide a rear axle housing assembly and tractor that has a high degree of integration, simplifies the assembly structure, reduces the size and space occupied by the equipment, and further reduces the equipment cost.

[0005] To achieve the above objectives, in a first aspect, the present invention provides a rear axle housing assembly, including a rear axle housing, wherein a gear system is installed inside the rear axle housing, and the gear system includes a power take-off gear transmission system and a transfer case gear transmission system.

[0006] The power take-off gear transmission system includes a double pump input shaft, a double pump idler shaft, and a double pump driven gear shaft, which are fixedly installed inside the rear axle housing, and power take-off transmission gears that mesh with each other in sequence are respectively installed on the shafts.

[0007] The transfer case gear transmission system includes a transfer case input shaft and a transfer case idler shaft fixedly installed inside the rear axle housing, and transfer case transmission gears that mesh with each other are installed on the shafts.

[0008] In an optional embodiment, a transfer case idler wheel is mounted on the transfer case idler wheel shaft, and the transfer case idler wheel is meshed with a transfer case driven gear, which is mounted on a bevel gear shaft.

[0009] In an optional embodiment, the power take-off transmission gear includes a dual pump drive gear, a dual pump idler gear, and a dual pump driven gear that are meshed together in sequence.

[0010] In an optional embodiment, the input shaft of the dual pump is mounted inside the rear axle housing via bearings, and the drive gear of the dual pump is connected to the input shaft of the dual pump via splines.

[0011] In an optional embodiment, the dual pump idler shaft is fixed to the rear axle housing by connecting pins and bolts, and the dual pump idler is connected to the dual pump idler shaft by bearings.

[0012] In an optional embodiment, the dual pump driven gear shaft is mounted inside the rear axle housing via bearings, and the dual pump driven gear is connected to the dual pump driven gear shaft via splines.

[0013] In an optional embodiment, the transfer case input shaft is mounted inside the rear axle housing via bearings, the transfer case idler gear is meshed with the transfer case drive gear, and the transfer case drive gear is connected to the transfer case input shaft via splines.

[0014] In an optional embodiment, the transfer case idler shaft is fixed to the rear axle housing by connecting pins and bolts, and the transfer case idler wheel is connected to the transfer case idler shaft by bearings.

[0015] In an optional embodiment, the driven gear of the transfer case is connected to the bevel gear shaft via a spline.

[0016] Secondly, the present invention provides a tractor including a rear axle housing assembly as described in any of the foregoing embodiments, wherein the tractor includes an electric tractor.

[0017] The rear axle housing assembly of this invention enables the compact installation of the power take-off gear transmission system and the transfer case gear transmission system in a manner that improves assembly integration. This allows the two transmission systems to be integrated into the rear axle housing, reducing the assembly volume of the equipment, minimizing space occupation, and maximizing cost savings.

[0018] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the rear axle housing assembly in this application;

[0021] Figure 2 This is a schematic diagram of the gear system in this application;

[0022] Figure 3 This is a structural schematic diagram of the gear system from another perspective in this application;

[0023] Figure 4This is a schematic diagram of the power take-off gear transmission system in this application;

[0024] Figure 5 This is a schematic diagram of the transfer case gear transmission system in this application.

[0025] icon:

[0026] 1-Rear axle housing;

[0027] 2-Power take-off gear transmission system; 21-Double pump input shaft; 211-Double pump drive gear; 22-Double pump idler shaft; 221-Double pump idler gear; 23-Double pump driven gear shaft; 231-Double pump driven gear;

[0028] 3-Transfer case gear transmission system; 31-Transfer case input shaft; 311-Transfer case drive gear; 32-Transfer case idler shaft; 321-Transfer case idler gear; 33-Transfer case driven gear;

[0029] 4-Bevel gear shaft;

[0030] 5-Connecting pin. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] See Figures 1-5 The rear axle housing assembly in this application enhances the compactness of the transmission system layout and reduces the overall volume and space occupied by integrating the power take-off gear transmission system 2 and the transfer case gear transmission system 3 into the rear axle housing 1, thereby reducing equipment costs by simplifying the structure.

[0035] The rear axle housing assembly of this utility model includes a rear axle housing 1 as the main structure. The rear axle housing 1 serves as the mounting base for the transmission system and provides layout space for different transmission systems. By simultaneously installing the gear system in the rear axle housing 1, the integrated installation of the transmission system can be achieved, forming a compact layout.

[0036] The transmission system specifically includes a power take-off gear transmission system 2 and a transfer case gear transmission system 3. The two different transmission systems are integrated and installed inside the rear axle housing 1.

[0037] The two transmission systems in this utility model each include a transmission shaft and a transmission gear mounted on the transmission shaft. Starting from the integrated installation inside the rear axle housing 1, the power take-off gear transmission system 2 includes a double pump input shaft 21, a double pump idler shaft 22 and a double pump driven gear shaft 23 fixedly installed inside the rear axle housing 1, and power take-off transmission gears that are meshed and connected in sequence are respectively installed on the above different transmission shafts.

[0038] The transfer case gear transmission system 3 includes a transfer case input shaft 31 and a transfer case idler shaft 32, which are fixedly installed inside the rear axle housing 1, and transfer case transmission gears that mesh with each other are installed on the shafts.

[0039] It should be noted that the difference between the transfer case gear transmission system 3 and the power take-off gear transmission system 2 is that the transfer case gear transmission system 3 does not include a driven gear shaft. Instead, the power is transmitted by connecting the driven gear included in the transfer case gear transmission system 3 to the bevel gear shaft 4 included in the central drive assembly.

[0040] By integrating the different drive shafts and gears into the rear axle housing 1, the overall assembly integration can be enhanced while ensuring the effective transmission of power by the two transmission systems, and the volume and space occupied can be reduced, thus lowering costs.

[0041] Regarding the difference between the transfer case gear transmission system 3 and the power take-off gear transmission system 2 described above, in this utility model, a transfer case idler wheel 321 is installed on the transfer case idler wheel shaft 32, and the transfer case idler wheel 321 is meshed with the transfer case driven gear 33. The transfer case driven gear 33 is connected and installed on the bevel gear shaft 4, specifically the small bevel gear shaft 4.

[0042] The transfer case drive gear includes a transfer case drive gear 311, a transfer case idler gear 321, and a transfer case driven gear 33 that are meshed together in sequence. The transfer case idler gear 321 is mounted on the transfer case idler gear shaft 32. Specifically, as an intermediate connection in the transfer case drive, the transfer case idler gear 321 is meshed with the transfer case driven gear 33, and at the same time, the transfer case idler gear 321 is meshed with the transfer case drive gear 311, thus constituting the composition and meshing relationship of the transfer case drive gear.

[0043] From the perspective of the structural composition of the power take-off gear transmission system 2, based on the transmission shaft described above, the power take-off transmission gear includes a double pump drive gear 211, a double pump idler gear 221, and a double pump driven gear 231 that are connected in sequence.

[0044] Furthermore, the dual pump input shaft 21 is mounted inside the rear axle housing 1 via bearings, and the dual pump drive gear 211 is connected to the dual pump input shaft 21 via a spline. This allows the dual pump input shaft 21 to rotate relative to the rear axle housing 1. Simultaneously, the connection between the dual pump drive gear 211 and the dual pump input shaft 21 via the spline enables the dual pump input shaft 21 to drive the dual pump drive gear 211 to rotate synchronously relative to the rear axle housing 1, ensuring a normal power transmission chain.

[0045] The dual pump idler shaft 22 is fixed to the rear axle housing 1 by connecting pins 5 and bolts, and the dual pump idler 221 is connected to the dual pump idler shaft 22 by bearings. With this arrangement, the dual pump idler shaft 222 can be fixedly installed on the rear axle housing 1, allowing the dual pump idler 221 to rotate relative to the dual pump idler shaft 22 and the rear axle housing 1.

[0046] The dual pump driven gear shaft 23 is mounted inside the rear axle housing 1 via bearings. The dual pump driven gear 231 is connected to the dual pump driven gear shaft 23 via splines, thereby achieving an integral connection between the dual pump driven gear 231 and the dual pump driven gear shaft 23, enabling the dual pump driven gear 231 and the dual pump driven gear shaft 23 to rotate synchronously relative to the rear axle housing 1.

[0047] From the structural composition of the transfer case gear transmission system 3, the transfer case input shaft 31 is installed inside the rear axle housing 1 through bearings, the transfer case idler gear 321 is meshed with the transfer case drive gear 311, and the transfer case drive gear 311 is connected to the transfer case input shaft 31 through a spline, so that the transfer case input shaft 31 and the transfer case drive gear 311 rotate relative to the rear axle housing 1.

[0048] Furthermore, similar to the connection of the dual pump idler shaft 22 on the rear axle housing 1, the transfer case idler shaft 32 is fixed to the rear axle housing 1 by connecting pins 5 and bolts, and the transfer case idler 321 is connected to the transfer case idler shaft 32 by bearings.

[0049] This allows the transfer case idler shaft 32 to be fixedly mounted on the rear axle housing 1. Combined with the connection between the transfer case idler 321 and the transfer case idler shaft 32 through the bearing, the transfer case idler 321, which serves as an intermediate connection in the transmission, can rotate relative to the rear axle housing 1 and the transfer case idler shaft 32.

[0050] The bevel gear shaft 4 is mounted on the rear axle housing 1 via bearings, and the transfer case driven gear 33 is integrally connected to the bevel gear shaft 4 via splines, thereby enabling the transfer case driven gear 33 and the bevel gear shaft 4 to rotate synchronously relative to the rear axle housing 1.

[0051] The bevel gear shaft 4 is not part of the transfer case gear transmission system 3, but by connecting the transfer case driven gear 33 to the bevel gear shaft 4, normal transfer case transmission can be guaranteed.

[0052] In terms of the power transmission chain, in the power take-off gear transmission system 2, the motor transmits power to the input shaft 21 of the double pump through the motor output shaft, causing the motor output shaft to drive the input shaft 21 of the double pump to rotate. The input shaft 21 of the double pump drives the driving gear 211 of the double pump to rotate synchronously, further transmitting power to the idler gear 221 of the double pump. The idler gear 221 of the double pump drives the driven gear 231 of the double pump to rotate while rotating, and finally outputs power through the driven gear shaft 23 of the double pump.

[0053] In the transfer case gear transmission system 3, the transfer case input shaft 31 serves as the power input, and while rotating, it drives the transfer case drive gear 311 to rotate synchronously.

[0054] The transfer case drive gear 311 and transfer case driven gear 33 are meshed with the transfer case idler gear 321, so that the transfer case idler gear 321 serves as an intermediate connection for power transmission. When rotating, it drives the double pump driven gear 231 to rotate, and finally outputs power through the bevel gear shaft 4.

[0055] The structure described above in this invention can improve the compactness of the transmission system layout, simplify the structural composition, and reduce equipment costs.

[0056] This utility model also provides a tractor, including the rear axle housing assembly described above. The tractor specifically includes an electric tractor. By installing a motor at the front end of the rear axle housing, a connection for power output and transmission can be formed.

[0057] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0058] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A rear axle housing assembly characterized by, Includes a rear axle housing, within which a gear system is installed, the gear system including a power take-off gear transmission system and a transfer case gear transmission system; The power take-off gear transmission system includes a double pump input shaft, a double pump idler shaft, and a double pump driven gear shaft, which are fixedly installed inside the rear axle housing, and power take-off transmission gears that mesh with each other in sequence are respectively installed on the shafts. The transfer case gear transmission system includes a transfer case input shaft and a transfer case idler shaft fixedly installed inside the rear axle housing, and transfer case transmission gears that mesh with each other are installed on the shafts.

2. The rear axle housing assembly according to claim 1, characterized in that, The transfer case idler wheel is mounted on the transfer case idler wheel shaft, and the transfer case idler wheel is meshed with the transfer case driven gear, which is mounted on a bevel gear shaft.

3. The rear axle housing assembly of claim 1, wherein, The power take-off transmission gear includes a dual pump drive gear, a dual pump idler gear, and a dual pump driven gear that are connected in sequence.

4. The rear axle housing assembly of claim 3, wherein, The input shaft of the dual pump is mounted inside the rear axle housing via bearings, and the drive gear of the dual pump is connected to the input shaft of the dual pump via splines.

5. The rear axle housing assembly of claim 3, wherein, The dual pump idler shaft is fixed to the rear axle housing by connecting pins and bolts, and the dual pump idler wheel is connected to the dual pump idler shaft by bearings.

6. The rear axle housing assembly according to claim 3, characterized in that, The driven gear shaft of the dual pump is mounted inside the rear axle housing via bearings, and the driven gear of the dual pump is connected to the driven gear shaft of the dual pump via splines.

7. The rear axle housing assembly of claim 2, wherein, The transfer case input shaft is mounted inside the rear axle housing via bearings. The transfer case idler gear is meshed with the transfer case drive gear, which is connected to the transfer case input shaft via a spline.

8. The rear axle housing assembly of claim 7, wherein, The transfer case idler shaft is fixed to the rear axle housing by connecting pins and bolts, and the transfer case idler wheel is connected to the transfer case idler shaft by bearings.

9. The rear axle housing assembly of claim 7, wherein, The driven gear of the transfer case is connected to the bevel gear shaft via a spline.

10. A tractor characterised in that, The tractor includes the rear axle housing assembly as described in any one of claims 1-9, and the tractor includes an electric tractor.

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