Multi-gear hydrostatic harvester gearbox

Abstract

The utility model relates to the technical field of gearboxes and agricultural machinery, in particular to a multi-gear hydrostatic harvester gearbox, which integrates a driving rear axle structure, realizes a four-wheel drive function and improves the escape capability of a harvester. An HST or an independent hydraulic motor can be selectively arranged, so that the power transmission flexibility is enhanced; a low-cost sliding gear is adopted for shifting, so that the comprehensive cost is reduced; the length of the six-shaft assembly can be adjusted according to the whole vehicle weight and the front axle load, and the whole vehicle adaptability is improved. By optimizing the structure and the transmission route, the cross-country performance and economical efficiency of the harvester are remarkably improved, different farmland operation requirements are met, and meanwhile the applicability of the gearbox to different types of harvesters is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of gearboxes, in particular to a multi-gear hydrostatic harvester gearbox. Background Art

[0002] The information disclosed in the background technology of the present invention is only intended to increase the understanding of the overall background of the present invention, and shall not necessarily be regarded as an admission or suggestion in any form that the information constitutes the prior art already known to those skilled in the art.

[0003] The traditional hydrostatic harvester gearbox has certain limitations in design, which are mainly manifested in the following aspects:

[0004] First, the lack of a driven rear axle structure: conventional hydrostatic harvester gearboxes do not have the ability to drive the rear axle, which limits the harvester's traction and stability on muddy, rugged or soft ground, especially in harsh farm environments, where the harvester can easily get into trouble.

[0005] Second, single HST configuration: Existing gearboxes are usually only equipped with an integrated hydraulic continuously variable transmission (HST). Although this configuration provides a continuous speed range, it lacks flexibility and cannot meet the different needs of power transmission under different working conditions.

[0006] Third, the gear shifting mechanism is expensive: the traditional high and low gear switching uses a meshing sleeve, which is reliable but has high manufacturing and maintenance costs. This is a huge burden for agricultural producers pursuing economic benefits.

[0007] Fourth, limited adaptability: Existing gearbox designs are often fixed and cannot be flexibly adjusted according to the specific needs of the harvester, such as different vehicle weights and front axle loads, which limits their application in a variety of harvester models.

[0008] In view of the above problems, there is an urgent need for an innovative multi-speed hydrostatic harvester gearbox on the market to overcome the design limitations of traditional hydrostatic harvester gearboxes. Utility Model Content

[0009] In order to solve the above technical problems, the utility model provides a multi-speed hydrostatic harvester gearbox, which significantly improves the off-road capability and economy of the harvester by introducing a driven rear axle structure, an optional HST or independent hydraulic motor configuration, a low-cost sliding gear shifting mechanism and an adjustable six-axle assembly length, while enhancing the applicability of the gearbox to different harvester models.

[0010] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0011] A multi-gear hydrostatic harvester gearbox comprises a gearbox body, wherein a first shaft assembly, a second shaft assembly, a third shaft assembly, a fourth shaft assembly, a fifth shaft assembly, a sixth shaft assembly, a seventh shaft assembly, an eighth shaft assembly and a four-wheel drive fork shaft are installed in the gearbox body.

[0012] The right side of the gearbox body is equipped with an HST input shaft assembly or a motor connection seat for installing the HST or the single motor respectively, and the output shaft of the HST or the single motor is drivingly connected to the input end of one shaft of the one shaft assembly;

[0013] The one-shaft output end of the one-shaft assembly is transmission-connected to the three-shaft input end of the three-shaft assembly through the two-shaft of the two-shaft assembly, the three-shaft input end of the three-shaft assembly includes a double gear consisting of a low-speed gear and a high-speed gear, and the three-shaft output end of the three-shaft assembly is transmission-connected to the four-shaft input end of the four-shaft assembly through a meshing sleeve;

[0014] The HST and the single motor are provided with corresponding forward joysticks or reverse joysticks, and the corresponding forward gear and reverse gear are realized by toggling the forward joystick or reverse joystick on the HST or the single motor and cooperating with the moving double gear and the meshing sleeve of the four-axis assembly;

[0015] It also includes a rear axle, wherein the four-axis output end of the four-axis assembly is divided into two transmission paths, wherein the four-axis output end of one path is sequentially connected to the fifth axis of the five-axis assembly and the sixth axis of the six-axis assembly to drive the front wheels, and the four-axis output end of the other path is sequentially connected to the seventh axis of the seven-axis assembly and the eighth axis of the eight-axis assembly to transmit power to the rear axle to drive the rear wheels;

[0016] The engagement sleeve is driven to move left and right by the four-wheel drive fork shaft in cooperation with the shift fork, and the transmission connection with the rear axle is realized or disconnected by the left and right movement of the engagement sleeve.

[0017] Preferably, the input shaft of the HST is drivingly connected to the pulley of the HST input shaft assembly, and the output shaft of the HST is drivingly connected to the input end of one shaft of the one shaft assembly;

[0018] The output shaft of the single motor is directly connected to a shaft of a shaft assembly.

[0019] Preferably, the seven-shaft output end is transmission-connected to the eight-shaft input end of the eight-shaft assembly via a pair of bevel gears.

[0020] Preferably, the seven-axis output end of the seven-axis assembly and the eight-axis output end of the eight-axis assembly are fixedly connected to the rim of the front wheel and the input end of the rear axle through corresponding flanges, respectively.

[0021] Preferably, the output shaft of the single motor and the input end of a shaft of a shaft assembly as well as the output shaft of the pulley and the input shaft of the HST are fixedly connected via corresponding internal splines or spline sleeves.

[0022] The utility model includes but is not limited to the following beneficial effects:

[0023] Enhanced off-road capability and escape performance: The introduction of four-wheel drive function by driving the rear axle structure greatly improves the driving stability and traction of the harvester on muddy, rugged or soft ground, effectively solving the problem of traditional models being prone to getting into trouble, and improving the harvester's operating efficiency in harsh farmland environments.

[0024] The optional configuration of HST and single motor allows users to choose a more suitable power transmission solution according to actual needs and operating conditions. Whether it is a continuous speed range or torque output under specific conditions, it can be flexibly responded to meet diverse usage scenarios and improve flexibility and applicability.

[0025] The sliding gear shifting mechanism is adopted. Compared with the traditional meshing sleeve shifting, the sliding gear shifting not only reduces the manufacturing cost, but also simplifies the maintenance process and reduces the long-term operating cost. It is especially beneficial for agricultural producers who pursue economic benefits.

[0026] Adjustable six-axle assembly length: It can be adjusted according to the harvester's vehicle weight and front axle load to ensure that the gearbox can adapt to the needs of harvesters of different models, enhance adaptability and scalability, and enhance the product's market competitiveness and customer satisfaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0028] Figure 2 It is a structural schematic diagram of the sealing structure of a traditional pressure relief cover.

[0029] The reference numerals involved in the accompanying drawings are:

[0030] 1. HST input shaft assembly; 2. One-shaft assembly; 3. Two-shaft assembly; 4. Three-shaft assembly; 5. Four-shaft assembly; 6. Five-shaft assembly; 7. Six-shaft assembly; 8. Transmission body; 9. Seven-shaft assembly; 10. Eight-shaft assembly; 11. Four-wheel drive fork shaft; 12. Motor connector. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0032] Figure 1 to Figure 2A multi-speed hydrostatic harvester gearbox is shown, comprising a gearbox body 8, in which a first shaft assembly 2, a second shaft assembly 3, a third shaft assembly 4, a fourth shaft assembly 5, a fifth shaft assembly 6, a sixth shaft assembly 7, a seventh shaft assembly 9, an eighth shaft assembly 10 and a four-wheel drive fork shaft 11 are installed, and an HST input shaft assembly 1 or a motor connection seat for installing an HST or a single motor respectively is installed on the right side of the gearbox body 8, and the output shafts of the HST or the single motor are drivingly connected to the first shaft input end of the first shaft assembly 2;

[0033] The one-shaft output end of the one-shaft assembly 2 is transmission-connected to the three-shaft input end of the three-shaft assembly 4 through the two-shaft of the two-shaft assembly 3, the three-shaft input end of the three-shaft assembly 4 includes a double gear consisting of a low-speed gear and a high-speed gear, and the three-shaft output end of the three-shaft assembly 4 is transmission-connected to the four-shaft input end of the four-shaft assembly 5 through a meshing sleeve;

[0034] The HST and the single motor are provided with corresponding forward joysticks or reverse joysticks, and corresponding forward gears and reverse gears are realized by moving the forward joysticks or reverse joysticks on the HST or the single motor and cooperating with the meshing sleeves of the moving double gears and the four-axis assembly 5;

[0035] It also includes a rear axle, wherein the four-axis output end of the four-axis assembly 5 is divided into two transmission paths, wherein the four-axis output end of one path is sequentially connected to the fifth axis of the five-axis assembly 6 and the sixth axis of the six-axis assembly 7 to drive the front wheels, and the four-axis output end of the other path is sequentially connected to the seventh axis of the seven-axis assembly 9 and the eighth axis of the eight-axis assembly 10 to transmit power to the rear axle to drive the rear wheels;

[0036] The engagement sleeve is driven to move left and right by the four-wheel drive fork shaft 11, and the transmission connection with the rear axle is realized or disconnected by the left and right movement of the engagement sleeve.

[0037] The input shaft of the HST is connected to the pulley of the HST input shaft assembly 1, and the output shaft of the HST is connected to the input end of a shaft of a shaft assembly 2; the output shaft of the single motor is directly connected to the shaft of a shaft assembly 2.

[0038] The seven-shaft output end is transmission-connected to the eight-shaft input end of the eight-shaft assembly 10 via a pair of bevel gears.

[0039] The seven-axis output end of the seven-axis assembly 9 and the eight-axis output end of the eight-axis assembly 10 are fixedly connected to the rim of the front wheel and the input end of the rear axle through corresponding flanges, respectively.

[0040] The output shaft of the single motor and the input end of the shaft of the shaft assembly 2 as well as the output shaft of the pulley and the input shaft of the HST are fixedly connected through corresponding internal splines or spline sleeves.

[0041] The significant differences between the present application and the conventional hydrostatic harvester gearbox are as follows:

[0042] 1. One of the significant differences:

[0043] Conventional hydrostatic harvester gearbox without driven rear axle structure.

[0044] The multi-speed hydrostatic harvester gearbox has a structure for driving the rear axle and can realize a four-wheel drive function.

[0045] The driven rear axle structure is to split the power for transmission, and drive the fork through the four-wheel drive fork shaft 11, which can realize the function of driving or not driving the rear axle. When the rear axle is driven, the harvester's ability to escape from difficulties is greatly improved. Therefore, according to the needs of the harvester, the road surface and the topography of the farmland, the two modes of driving the rear axle or not driving the rear axle can be selected in time.

[0046] 2. The second significant difference:

[0047] Conventional hydrostatic harvester gearbox is a structure with HST installed (HST is the abbreviation of hydraulic stepless transmission. It integrates the functions of hydraulic pump, hydraulic motor and control valve into one).

[0048] In addition to being able to install the HST, the multi-speed hydrostatic harvester transmission can also directly install a single motor, i.e., a hydraulic motor, by removing the HST input shaft assembly 1 and replacing it with a motor connector (the hydraulic motor in this case is separated from the hydraulic pump, and they are two separate assemblies).

[0049] 3. The third significant difference:

[0050] Conventional hydrostatic harvester gearbox, high and low gears on the right side of three-axis assembly 4, use clutch sleeve shifting.

[0051] The multi-speed hydrostatic harvester gearbox adopts a sliding gear (i.e., a double gear) for gear shifting, and the overall cost is low.

[0052] 4. The fourth significant difference:

[0053] The multi-speed hydrostatic harvester gearbox can replace the six-axle assembly 7 of different lengths according to the weight of the whole vehicle and the actual load bearing condition of the front axle to meet the whole vehicle requirements of harvesters with different numbers of rows. Therefore, the multi-speed hydrostatic harvester gearbox has better adaptability of the whole machine and meets the selection requirements of different harvester manufacturers.

[0054] In summary, the multi-speed hydrostatic harvester gearbox has the following advantages:

[0055] With four-wheel drive function, the rear axle can be driven at the same time, greatly improving the harvester's ability to escape from trouble.

[0056] It can be installed with HST or single motor to meet different usage requirements.

[0057] High and low gears are shifted by sliding gears, and the overall cost is low.

[0058] According to the vehicle weight and the actual load bearing of the front axle, the six-axle assembly of different lengths is replaced 7. The whole machine has better adaptability and meets the selection requirements of different harvester manufacturers.

[0059] The working process and principle of this application are as follows:

[0060] This application is described separately because the structure and transmission route are slightly different when installing HST or single motor:

[0061] When installing the HST, the engine power is input to the HST input shaft through the pulley of the HST input shaft assembly 1, and the input shaft of the HST is connected through the spline sleeve. The output shaft of the HST is connected to a shaft through the spline. The output torque of the HST is automatically adjusted according to the load of the whole machine. The forward or reverse function can be realized on the HST.

[0062] When a single motor is installed, the output shaft of the single motor is directly connected to the first shaft of the first shaft assembly 2 through an internal spline or a spline sleeve. The output torque of the motor is automatically adjusted according to the load of the whole machine. The forward or reverse function can also be realized on the single motor.

[0063] The power is transmitted to the second shaft assembly 3 via the gear on the first shaft assembly 2. The two gears on the second shaft assembly 3 are respectively meshed with the double gear on the right side of the third shaft assembly 4 to transmit the power to the third shaft assembly 4. Low gear and high gear are achieved by moving the double gear left and right.

[0064] The two gears on the left side of the three-axis assembly 4 are meshed with the two gears on the left side of the four-axis assembly 5 to transmit power to the four-axis assembly 5. The first gear and the second gear are achieved by moving the meshing sleeve on the left side of the four-axis assembly 5 left and right.

[0065] Therefore, the double gears (low gear and high gear) on the right side of the three-axis assembly 4 and the two gears (first gear passive gear and second gear passive gear) on the left side of the four-axis assembly 5 are respectively moved by moving the engagement sleeves on the double gears and the four-axis assembly 5, and then cooperating with the forward joystick or reverse joystick on the HST or single motor to achieve forward gear and reverse gear.

[0066] The power is transmitted in two ways on the four-axis assembly 5:

[0067] One of the power paths is transmitted to the six-axis assembly 7 through the five-axis assembly 6, and the rim of the front wheel is driven to rotate through the six-axis. The six-axis assembly 7 of different lengths can be replaced according to the weight of the whole vehicle and the actual load bearing condition of the front axle to meet the whole vehicle requirements of harvesters with different numbers of rows.

[0068] The other power is transmitted to the seventh-axis assembly 9 through the gear on the right side of the fourth-axis assembly 5. Then, through a pair of bevel gears, the power is transmitted to the eighth-axis assembly 10. Through the flange on the eighth-axis, the power is transmitted to the rear axle through the transmission shaft, thereby driving the rear axle tires to rotate at the same time, greatly improving the harvester's ability to escape from difficulties.

[0069] According to the road surface and farmland topography, the four-wheel drive fork shaft 11 is manipulated to move the engagement sleeve left and right to achieve the two functions of rear axle non-driving or rear axle driving.

[0070] In addition, the shift mechanism assembly (not shown in the structural diagram) can realize upper shifting at the upper cover position or side shifting at the side of the transmission case 8 according to the needs of the whole machine.

[0071] This multi-speed hydrostatic harvester gearbox not only improves the overall performance of the harvester and solves the limitations of traditional gearboxes, but also optimizes the user's operating experience and can bring significant benefits to agricultural production.

[0072] The terms "upper", "lower", "outer side", "inner side", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish the relative relationship in position if they exist, and do not need to be qualitative. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0073] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multi-gear hydrostatic harvester gearbox, comprising a gearbox body, in which a first shaft assembly, a second shaft assembly, a third shaft assembly, a fourth shaft assembly, a fifth shaft assembly, a sixth shaft assembly, a seventh shaft assembly, an eighth shaft assembly and a four-wheel drive fork shaft are installed, characterized in that: The right side of the gearbox body is equipped with an HST input shaft assembly or a motor connection seat for installing the HST or the single motor respectively, and the output shaft of the HST or the single motor is drivingly connected to the input end of one shaft of the one shaft assembly; The one-shaft output end of the one-shaft assembly is transmission-connected to the three-shaft input end of the three-shaft assembly through the two-shaft of the two-shaft assembly, the three-shaft input end of the three-shaft assembly includes a double gear consisting of a low-speed gear and a high-speed gear, and the three-shaft output end of the three-shaft assembly is transmission-connected to the four-shaft input end of the four-shaft assembly through a meshing sleeve; The HST and the single motor are provided with corresponding forward joysticks or reverse joysticks, and the corresponding forward gear and reverse gear are realized by toggling the forward joystick or reverse joystick on the HST or the single motor and cooperating with the moving double gear and the meshing sleeve of the four-axis assembly; It also includes a rear axle, wherein the four-axis output end of the four-axis assembly is divided into two transmission paths, wherein the four-axis output end of one path is sequentially connected to the fifth axis of the five-axis assembly and the sixth axis of the six-axis assembly to drive the front wheels, and the four-axis output end of the other path is sequentially connected to the seventh axis of the seven-axis assembly and the eighth axis of the eight-axis assembly to transmit power to the rear axle to drive the rear wheels; The engagement sleeve is driven to move left and right by the four-wheel drive fork shaft in cooperation with the shift fork, so as to realize the transmission connection or disconnection of the rear axle.

2. The multi-speed hydrostatic harvester gearbox according to claim 1, characterized in that: The input shaft of the HST is drivingly connected to the pulley of the HST input shaft assembly, and the output shaft of the HST is drivingly connected to the input end of one shaft of the one shaft assembly; The output shaft of the single motor is directly connected to a shaft of a shaft assembly.

3. The multi-speed hydrostatic harvester gearbox according to claim 1, characterized in that: The seven-shaft output end is transmission-connected to the eight-shaft input end of the eight-shaft assembly through a pair of bevel gears.

4. The multi-speed hydrostatic harvester gearbox according to claim 1, characterized in that: The seven-axis output end of the seven-axis assembly and the eight-axis output end of the eight-axis assembly are fixedly connected to the rim of the front wheel and the input end of the rear axle through corresponding flanges respectively.

5. The multi-speed hydrostatic harvester gearbox according to claim 2, characterized in that: The output shaft of the single motor and the input end of the shaft of the shaft assembly as well as the output shaft of the pulley and the input shaft of the HST are fixedly connected through corresponding internal splines or spline sleeves.

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