A gearbox for an agricultural machine

Abstract

The utility model discloses a gearbox of agricultural operation machine, including the box, the box rotation is connected with first output half axle and second output half axle, and the differential is connected between first output half axle and second output half axle, the shell of differential includes with first output half axle rotation connection's first casing part and with second output half axle rotation connection's second casing part, the inside of shell is provided with half axle gear set and planetary gear set, first casing part and second casing part integrated. The scheme has solved the problem that the use reliability of prior art gearbox is easily low because of the influence of differential.

Description

Technical Field

[0001] This utility model relates to a gearbox for agricultural machinery. Background Technology

[0002] The gearbox of an agricultural work machine is a device that adjusts the speed of the power generated by the engine and outputs the power from the output shaft. When the output shaft on the gearbox is used to drive the rotation of the wheels, the output shaft needs to be divided into a first output half-shaft and a second output half-shaft, and a differential needs to be used to connect the first output half-shaft and the second output half-shaft to accommodate the inner wheel difference phenomenon that occurs when the agricultural work machine turns.

[0003] Chinese patent document CN207814363U discloses a main reducer with differential assembly, including a main reducer assembly and an inter-wheel differential assembly. The main reducer assembly comprises a main reducer housing and a driving bevel gear, the driving bevel gear being rotatably mounted at one end of the main reducer housing. The inter-wheel differential assembly comprises a left differential housing and a right differential housing rotatably mounted on the main reducer housing, four planetary gears (left and right half-shaft bevel gears), and a driven bevel gear. The right differential housing is detachably mounted on the left differential housing. A spherical cavity is formed between the left and right differential housings for mounting the left and right half-shaft bevel gears and planetary gears. The passive bevel gear is detachably mounted on the left differential housing near the right differential housing. The centerlines of the left half-shaft bevel gear, the right half-shaft bevel gear, and the passive bevel gear coincide. The right differential housing has four shaft mounting holes that penetrate the inside and outside of the right reducer housing. The four shaft mounting holes are located on two mutually perpendicular diameters of the spherical cavity, and the plane containing the four shaft mounting holes is perpendicular to the centerline of the passive bevel gear. The four planetary gears are rotatably mounted in the spherical cavity through shafts set in the shaft mounting holes, and all four planetary gears simultaneously mesh with the left half-shaft bevel gear and the right half-shaft bevel gear. The passive bevel gear meshes with the driving bevel gear.

[0004] In the prior art, the left and right differential housings are connected and fixed by differential housing connecting bolts. When such a differential is used in the gearbox, the working environment of agricultural machinery is relatively harsh, and the differential housing connecting bolts are prone to loosening or breaking and falling off. As a result, the loose differential housing connecting bolts can easily damage the gears and other components in the gearbox, leading to a decrease in the reliability of the gearbox. Utility Model Content

[0005] The purpose of this invention is to provide a gearbox for agricultural machinery to solve the problem that the reliability of gearboxes in the prior art is easily reduced due to the influence of the differential.

[0006] To achieve the above objectives, the basic solution of this utility model provides a gearbox for an agricultural machine, including a housing, wherein a first output half-shaft and a second output half-shaft are rotatably connected to the housing, and a differential is connected between the first output half-shaft and the second output half-shaft; the housing of the differential includes a first housing portion rotatably connected to the first output half-shaft and a second housing portion rotatably connected to the second output half-shaft, and a half-shaft gear set and a planetary gear set are provided inside the housing, wherein the first housing portion and the second housing portion are integrally formed.

[0007] The beneficial effects of this basic solution are as follows: by integrally molding the first housing part and the second housing part, the differential housing does not need to be connected with bolts or other fasteners, thereby avoiding the damage to gears and other components inside the gearbox caused by the bolts or other fasteners on the differential coming loose. This helps to reduce the risk of gearbox damage and thus improves the reliability of the gearbox.

[0008] Preferably, the first housing portion is provided with an assembly hole whose diameter is larger than that of the half-shaft gear, and the second housing portion is provided with a mounting hole that rotatably engages with the half-shaft gear. This arrangement allows for support of one half-shaft gear in the half-shaft gear set via the mounting hole, while facilitating assembly of the half-shaft gear via the assembly hole. This improves the stability of the differential while also simplifying assembly operations.

[0009] Preferably, both ends of the differential housing are rotatably connected to the housing via bearings. This arrangement, using the housing to support both ends of the differential housing, helps improve the stability of the differential.

[0010] Preferably, the input gear of the differential is keyed to the first housing portion. This arrangement facilitates the assembly operation of the input gear of the differential with the first housing portion.

[0011] Preferably, the input gear is splinedly connected to the first housing portion. This arrangement facilitates easier assembly of the input gear and the first housing portion, as well as improves the reliability of power transmission.

[0012] Preferably, the housing has a hollowed-out section in the middle. This design allows lubricating oil to easily enter the housing through the hollowed-out section to lubricate the gear set, thereby further improving the reliability of the differential. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of an embodiment of the gearbox of an agricultural work machine according to the present invention; Figure 2 for Figure 1 AA section view; Figure 3 for Figure 2 A schematic diagram of the differential housing. Detailed Implementation

[0014] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: housing 1, first output half-shaft 2, bearing 3, input gear 4, housing 5, first housing part 51, second housing part 52, half-shaft gear set 6, planetary gear set 7, support shaft 8, second output half-shaft 9, assembly hole 10, mounting hole 11.

[0015] The basic implementation examples are as follows: Figure 1 , Figure 2 and Figure 3 The image shows a gearbox for an agricultural work machine, comprising a housing 1. A first output half-shaft 2 and a second output half-shaft 9 are rotatably connected to the housing 1, and a differential is connected between the first output half-shaft 2 and the second output half-shaft 9. The differential housing 5 includes a first housing portion 51 rotatably connected to the first output half-shaft 2 and a second housing portion 52 rotatably connected to the second output half-shaft 9, the first housing portion 51 and the second housing portion 52 being integrally formed. Inside the housing 5 are a half-shaft gear set 6 and a planetary gear set 7. The half-shaft gear set 6 includes half-shaft gears respectively connected to the first output half-shaft 2 and the second output half-shaft 9, and the planetary gear set 7 includes two planetary gears respectively meshing with the two half-shaft gears. The planetary gear set 7 is rotatably connected to the housing 5 via a support shaft 8. The support shaft 8 is radially inserted through the housing 5 and fixed by a pin connection.

[0016] In this embodiment, the first housing part 51 is provided with an assembly hole 10 with a diameter larger than that of the half-shaft gear, and the second housing part 52 is provided with a mounting hole 11 that rotatably engages with the half-shaft gear. In this embodiment, both ends of the differential housing 5 are rotatably connected to the housing 1 via bearings 3, thereby enabling the housing 1 to provide rotatable support to both ends of the differential housing 5 via the bearings 3, thereby improving the stability of the differential.

[0017] In this embodiment, the input gear 4 of the differential is keyed to the first housing portion 51, thereby transmitting power from the input gear 4 to the first housing portion 51, causing the outer casing 5 to rotate synchronously with the input gear 4. More preferably, the input gear 4 is splined to the first housing portion 51, thereby improving both assembly convenience and the reliability of power transmission. In this embodiment, the middle portion of the outer casing 5 is hollowed out.

[0018] By adopting this solution, the first housing part 51 and the second housing part 52 are integrally formed, so that the differential housing 5 does not need to be connected with bolts or other fasteners. This avoids the bolts or other fasteners on the differential from falling off and damaging gears and other components inside the gearbox, which helps to reduce the risk of gearbox damage and thus improves the reliability of the gearbox.

[0019] The above description is merely an embodiment of this utility model, and common knowledge such as specific structures and characteristics of the solution is not described in detail here. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model, and these should also be considered within the protection scope of this utility model. These modifications and improvements will not affect the effectiveness of the implementation of this utility model or the practicality of the patent.

Claims

1. A gearbox for an agricultural work machine, comprising a housing, wherein a first output half-shaft and a second output half-shaft are rotatably connected to the housing, and a differential is connected between the first output half-shaft and the second output half-shaft; the differential housing comprises a first housing portion rotatably connected to the first output half-shaft and a second housing portion rotatably connected to the second output half-shaft, and an half-shaft gear set and a planetary gear set are disposed inside the housing, characterized in that: The first housing portion and the second housing portion are integrally formed.

2. The gearbox of an agricultural work machine according to claim 1, characterized in that: The first housing part is provided with an assembly hole with a diameter larger than that of the half-shaft gear, and the second housing part is provided with a mounting hole that rotatably engages with the half-shaft gear.

3. The gearbox of an agricultural work machine according to claim 2, characterized in that: The two ends of the differential housing are rotatably connected to the housing via bearings.

4. The gearbox of an agricultural work machine according to claim 3, characterized in that: The input gear of the differential is keyed to the first housing.

5. The gearbox of an agricultural work machine according to claim 4, characterized in that: The input gear is splinedly connected to the first housing portion.

6. The gearbox of an agricultural work machine according to claim 5, characterized in that: The outer shell has a hollowed-out section in the middle.

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