Chassis transmission structure and harvester

Abstract

The chassis transmission structure comprises a bottom frame, a front drive axle assembly, a rear drive axle assembly and a transmission assembly, the front drive axle assembly is fixed at the bottom of the front end of the bottom frame, and a gearbox in transmission connection with the front drive axle assembly is arranged on the front drive axle assembly. The rear drive axle assembly and the front drive axle assembly are oppositely arranged front and back and are in transmission connection with the front drive axle, and the transmission assembly is located between the front drive axle assembly and the rear drive axle assembly and comprises a first universal coupling in transmission connection with the gearbox. The transfer case is in transmission connection with the first universal coupling, and the universal transmission mechanism is connected with the transfer case and the rear drive axle assembly. When a vehicle runs, the gearbox drives the transfer case to rotate through the first universal coupling, the transfer case drives the universal transmission mechanism to rotate and then drives the rear drive axle assembly to rotate, the gearbox and the transfer case are connected through the first universal coupling, the coaxiality of the axis during power transmission is compensated, and the transmission stability is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of harvesters, in particular to a chassis transmission structure and a harvester. Background Art

[0002] In the transmission structure of the harvester chassis, the power output by the engine needs to pass through a series of power transmission devices to reach the drive wheels. The power transmission mechanism between the engine and the drive wheels is the vehicle's transmission system, which is mainly composed of a gearbox, a transmission shaft, a transfer case, a final reducer, and other parts. A good power transmission system should be able to ensure the necessary traction and speed of the vehicle under various driving conditions, as well as the coordinated changes between traction and speed, which puts higher requirements on the performance of its power transmission system.

[0003] During the layout of the chassis transmission structure, due to a certain installation distance and height difference between the transfer case and the gearbox, the coaxiality of the axes when the two are connected cannot be guaranteed, and the transmission stability is greatly affected.

[0004] Therefore, it is necessary to provide a chassis transmission structure to overcome the above-mentioned defects. Utility Model Content

[0005] The utility model aims to provide a chassis transmission structure and a harvester which have the characteristics of high bearing capacity, stable transmission, high transmission efficiency, simple structure, convenient maintenance and the like.

[0006] According to one aspect of the utility model, a chassis transmission structure is provided, comprising:

[0007] chassis;

[0008] A front drive axle assembly, the front drive axle assembly being fixed to the front bottom of the chassis, and the front drive axle assembly being provided with a gearbox drivingly connected to the front drive axle assembly;

[0009] A rear drive axle assembly, the rear drive axle assembly being arranged front-to-rear with respect to the front drive axle assembly and being drivingly connected to the front drive axle;

[0010] A transmission assembly, the transmission assembly is located between the front drive axle assembly and the rear drive axle assembly, and includes a first universal coupling drivingly connected to the gearbox, a transfer case drivingly connected to the first universal coupling, and a universal transmission mechanism connecting the transfer case and the rear drive axle assembly;

[0011] When the vehicle is running, the gearbox drives the transfer case to rotate through the first universal joint, and the transfer case drives the universal transmission mechanism to rotate, which in turn drives the rear drive axle assembly to rotate. The gearbox and the transfer case are connected by the first universal joint, which compensates for the coaxiality of the axis during power transmission and ensures the stability of transmission.

[0012] Preferably, the transfer case is fixed to the chassis and is arranged on the axial side of the gearbox, a brake device is provided between the gearbox and the transfer case, and the brake device is fixed to the gearbox.

[0013] Preferably, the gearbox includes a transfer output shaft connected to the first universal joint, the transfer case includes a transfer input shaft connected to the first universal joint, the end of the transfer output shaft is provided with a first connecting flange fixed to the first universal joint, and the end of the transfer input shaft is provided with a second connecting flange fixed to the first universal joint.

[0014] Preferably, the first universal coupling comprises an inner shaft and an outer shaft, and the inner shaft and the outer shaft are spline-connected and can move axially relative to each other.

[0015] Preferably, the front drive axle assembly includes a front axle tube beam, a side reduction mechanism arranged on both sides of the front axle tube beam, a cylinder bracket arranged in the middle of the front axle tube beam, and a frame fixing plate arranged on both sides of the upper surface of the front axle tube beam, and the front axle tube beam includes side reduction mounting plates arranged at both ends thereof and used to fix the side reduction mechanism.

[0016] Preferably, a gearbox hanging plate is provided on the front axle tube beam, and the gearbox is fixed to the rear of the front axle tube beam through the gearbox hanging plate.

[0017] Preferably, the universal transmission mechanism includes a second universal coupling that is transmission-connected to the transfer case and whose length can be adjusted automatically, a third universal coupling that is transmission-connected to the rear drive axle assembly and whose length can be adjusted automatically, and a bearing seat assembly that connects the second universal coupling and the third universal coupling, and the bearing seat assembly is fixed to the base frame.

[0018] Preferably, the bearing seat assembly includes a seat body fixed to the base frame, a transition shaft passing through the seat body, and a first bearing and a second bearing coaxially arranged between the seat body and the transition shaft, and the transition shaft is supported in the seat body by the first bearing and the second bearing.

[0019] Preferably, the rear drive axle assembly includes a rear axle housing, the top of the rear axle housing is rotatably connected to the chassis via a pin, and the pin is horizontally arranged perpendicular to the rear axle housing.

[0020] Preferably, a pull rod is provided on the upper surface of both sides of the rear axle housing, one end of the pull rod is rotatably connected to the rear axle housing, and the other end of the pull rod is rotatably connected to the base frame through a pull rod mounting seat.

[0021] According to another aspect of the utility model, a harvester is provided, comprising the chassis transmission structure described in any one of the above items.

[0022] Compared with the prior art, the chassis transmission structure and harvester provided by the utility model have the following beneficial effects:

[0023] Due to the adoption of the above technical solution, the utility model has the advantages of simple structure, ingenious design and low cost. The first universal coupling is used to connect the transfer case and the gearbox. The first universal coupling is connected by an inner shaft and an outer shaft spline sleeve and can move axially with each other. The axial movement can adapt to different connection distances between the gearbox and the transfer case during installation. At the same time, the first universal coupling connecting the gearbox and the transfer case can also compensate for the coaxiality of the axis during power transmission and ensure the stability of the transmission. Under the same conditions, the structure is further simplified, the loss of transmission efficiency is further reduced, and installation and maintenance are more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The utility model is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0025] Figure 1 The three-dimensional chassis transmission structure of the utility model Figure 1 ;

[0026] Figure 2 The three-dimensional chassis transmission structure of the utility model Figure 2 ;

[0027] Figure 3 It is a bottom view of the chassis transmission structure of the utility model;

[0028] Figure 4 It is a partial three-dimensional diagram of the chassis transmission structure of the utility model;

[0029] Figure 5 It is a cross-sectional view of the bearing seat assembly of the utility model;

[0030] Figure 6 It is a structural schematic diagram of the front drive axle assembly of the utility model;

[0031] Figure 7 It is a structural schematic diagram of the rear drive axle assembly of the utility model.

[0032] Among them, 1. chassis, 2. front drive axle assembly, 21. front axle pipe beam, 211. side reduction mounting plate, 22. side reduction mechanism, 23. cylinder bracket, 24. frame fixing plate, 25. spline half shaft, 26. gearbox hanging plate, 3. rear drive axle assembly, 31. rear axle housing, 32. pin shaft, 4 gearbox, 41. transfer output shaft, 42. first connecting flange, 5. transmission assembly, 51. first universal joint, 511. inner shaft, 512. outer shaft , 52. transfer case, 521. transfer input shaft, 522. second connecting flange, 53. universal transmission mechanism, 531. second universal coupling, 532. third universal coupling, 533. bearing seat assembly, 5331. seat body, 5332. transition shaft, 5333. third connecting flange, 5334. fourth connecting flange, 5335. first bearing, 5336. second bearing, 6. brake device, 71. tie rod, 72. tie rod mounting seat. DETAILED DESCRIPTION

[0033] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0035] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0036] In this article, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0037] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0038] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0039] See also Figure 1 and Figure 2 This embodiment discloses a chassis transmission structure, including a chassis 1, a front drive axle assembly 2, a rear drive axle assembly 3 and a transmission assembly 5. With the forward direction of the harvester as the front, the front drive axle assembly 2 is fixed to the front bottom of the chassis 1, the front drive axle assembly 2 and the rear drive axle assembly 3 are arranged at the bottom of the chassis 1 in a front-to-back manner, and the rear drive axle assembly 3 is connected to the front drive axle assembly 2 through the transmission assembly 5. The front drive axle assembly 2 is provided with a gearbox 4 connected to the front drive axle assembly 2.

[0040] The transmission assembly 5 is located between the front drive axle assembly 2 and the rear drive axle assembly 3, and includes a first universal coupling 51 drivingly connected to the gearbox 4, a transfer case 52 drivingly connected to the first universal coupling 51, and a universal transmission mechanism 53 connecting the transfer case 52 and the rear drive axle assembly 3. When the vehicle is running, the hydraulic motor (not shown) transmits power to the gearbox 4, the gearbox 4 drives the transfer case 52 to rotate through the first universal coupling 51, the transfer case 52 drives the universal transmission mechanism 53 to rotate, and then drives the rear drive axle assembly 3 to rotate.

[0041] See also Figure 3 and Figure 4 The gearbox 4 includes a transfer output shaft 41 connected to a first universal coupling 51, and a first connection flange 42 fixed to the first universal coupling 51 is provided at the end of the transfer output shaft 41. The transfer case 52 includes a transfer input shaft 521 connected to the first universal coupling 51, and a second connection flange 522 fixed to the first universal coupling 51 is provided at the end of the transfer input shaft 521. The first universal coupling 51 includes an inner shaft 511 and an outer shaft 512, and the inner shaft 511 and the outer shaft 512 are splined and can move axially with each other. The axial movement can adapt to different connection distances between the gearbox 4 and the transfer case 52 during installation. At the same time, the first universal coupling 51 connecting the gearbox 4 and the transfer case 52 can also compensate for the coaxiality of the axis during power transmission, thereby ensuring the stability of transmission.

[0042] The transfer case 52 is fixed to the chassis 1 and disposed on the axial side of the gearbox 4. A brake device 6 is disposed between the gearbox 4 and the transfer case 52. The brake device 6 is fixed to the gearbox 4. The transfer input shaft 521 passes through the brake device 6 and is connected to the first universal coupling 51.

[0043] See also Figure 6 The front drive axle assembly 2 includes a front axle tube beam 21, a side reduction mechanism 22 arranged on both sides of the front axle tube beam 21, a cylinder bracket 23 arranged in the middle of the front axle tube beam 21, and a frame fixing plate 24 arranged on both sides of the upper surface of the front axle tube beam 21. The front axle tube beam 21 includes side reduction mounting plates 211 arranged at both ends thereof and used to fix the side reduction mechanism 22. The power is transmitted to the gearbox 4 through the hydraulic motor, and then transmitted to the side reduction mechanisms 22 on both sides through the spline half shaft 25 to complete the entire front axle power transmission process. A gearbox hanging plate 26 is provided on the front axle tube beam 21, and the gearbox 4 is fixed to the rear of the front axle tube beam 21 through the gearbox hanging plate 26.

[0044] See also Figure 2 and 5 The universal transmission mechanism 53 includes a second universal coupling 531 which is connected to the transfer case 52 and whose length can be adjusted automatically, a third universal coupling 532 which is connected to the rear drive axle assembly 3 and whose length can be adjusted automatically, and a bearing seat assembly 533 which connects the second universal coupling 531 and the third universal coupling 532. The bearing seat assembly 533 is fixed to the chassis 1. The bearing seat assembly 533 includes a seat body 5331 which is fixed to the chassis 1, a transition shaft 5332 which passes through the seat body 5331, and a first bearing 5335 and a second bearing 5336 which are coaxially arranged between the seat body 5331 and the transition shaft 5332. The transition shaft 5332 is supported in the seat body 5331 by the first bearing 5335 and the second bearing 5336.

[0045] The first bearing 5335 and the second bearing 5336 are symmetrically sleeved on the transition shaft 5332, and the third connection flange 5333 and the fourth connection flange 5334 are respectively provided at both ends of the transition shaft 5332. The third connection flange 5333 is fixed to the second universal joint 531, and the fourth connection flange 5334 is fixed to the third universal joint 532. The power of the transfer case 52 is transmitted to the transition shaft 5332 through the second universal joint 531, and then transmitted to the rear drive axle assembly 3 through the third universal joint 532. While improving the overall load-bearing capacity, its structure is simplified, which can make it more convenient to install the chassis, header, etc.

[0046] See also Figure 7The rear drive axle assembly 3 includes a rear axle housing 31, the top of which is rotatably connected to the chassis 1 through a pin 32, and the pin 32 is arranged horizontally perpendicular to the rear axle housing 31. Tie rods 71 ​​are arranged on the upper surfaces of both sides of the rear axle housing 31, one end of the tie rod 71 is rotatably connected to the rear axle housing 31, and the other end of the tie rod 71 is rotatably connected to the chassis 1 through a tie rod mounting seat 72. The rear axle housing 31 is connected to the chassis 1 through the tie rod 71 and the tie rod mounting seat 72, which can assist in limiting the steering thereof, and bear part of the stress together with the pin, thereby ensuring stability during driving.

[0047] The utility model also discloses a harvester, which comprises the above chassis transmission structure.

[0048] It will be apparent to those skilled in the art that various modifications and variations can be made to the above exemplary embodiments of the present invention without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention covers modifications and variations of the present invention that fall within the scope of the appended claims and their equivalent technical solutions.

Claims

1. A chassis transmission structure, characterized in that: include: chassis; A front drive axle assembly, the front drive axle assembly being fixed to the front bottom of the chassis, and the front drive axle assembly being provided with a gearbox drivingly connected to the front drive axle assembly; A rear drive axle assembly, the rear drive axle assembly being arranged front-to-rear with respect to the front drive axle assembly and being drivingly connected to the front drive axle; A transmission assembly, the transmission assembly is located between the front drive axle assembly and the rear drive axle assembly, and includes a first universal coupling drivingly connected to the gearbox, a transfer case drivingly connected to the first universal coupling, and a universal transmission mechanism connecting the transfer case and the rear drive axle assembly; When the vehicle is running, the gearbox drives the transfer case to rotate through the first universal joint, and the transfer case drives the universal transmission mechanism to rotate, which in turn drives the rear drive axle assembly to rotate. The gearbox and the transfer case are connected by the first universal joint, which compensates for the coaxiality of the axis during power transmission and ensures the stability of transmission.

2. The chassis transmission structure according to claim 1, characterized in that: The transfer case is fixed to the chassis and is arranged on the axial side of the gearbox. A brake device is arranged between the gearbox and the transfer case, and the brake device is fixed to the gearbox.

3. The chassis transmission structure according to claim 2, characterized in that: The gearbox includes a transfer output shaft connected to a first universal joint, the transfer case includes a transfer input shaft connected to the first universal joint, an end of the transfer output shaft is provided with a first connecting flange fixed to the first universal joint, and an end of the transfer input shaft is provided with a second connecting flange fixed to the first universal joint.

4. The chassis transmission structure according to claim 3, characterized in that: The first universal coupling comprises an inner shaft and an outer shaft, and the inner shaft and the outer shaft are connected by splines and can move axially relative to each other.

5. The chassis transmission structure according to claim 4, characterized in that: The front drive axle assembly includes a front axle tube beam, a side reduction mechanism arranged on both sides of the front axle tube beam, a cylinder bracket arranged in the middle of the front axle tube beam, and a frame fixing plate arranged on both sides of the upper surface of the front axle tube beam. The front axle tube beam includes side reduction mounting plates arranged at both ends thereof and used to fix the side reduction mechanism.

6. The chassis transmission structure according to claim 5, characterized in that: A gearbox hanging plate is provided on the front axle tube beam, and the gearbox is fixed to the rear of the front axle tube beam through the gearbox hanging plate.

7. The chassis transmission structure according to claim 6, characterized in that: The universal transmission mechanism includes a second universal coupling that is transmission-connected to the transfer case and whose length can be adjusted automatically, a third universal coupling that is transmission-connected to the rear drive axle assembly and whose length can be adjusted automatically, and a bearing seat assembly that connects the second universal coupling and the third universal coupling, and the bearing seat assembly is fixed to the base frame.

8. The chassis transmission structure according to claim 7, characterized in that: The bearing seat assembly includes a seat body fixed to the base frame, a transition shaft passing through the seat body, and a first bearing and a second bearing coaxially arranged between the seat body and the transition shaft. The transition shaft is supported in the seat body by the first bearing and the second bearing.

9. The chassis transmission structure according to claim 8, characterized in that: The rear drive axle assembly comprises a rear axle housing, the top of the rear axle housing is rotatably connected to the chassis via a pin shaft, and the pin shaft is horizontally arranged perpendicular to the rear axle housing.

10. The chassis transmission structure according to claim 9, characterized in that: Pull rods are provided on the upper surfaces of both sides of the rear axle housing, one end of the pull rod is rotatably connected to the rear axle housing, and the other end of the pull rod is rotatably connected to the chassis through a pull rod mounting seat.

11. A harvester, characterized in that: The invention comprises the chassis transmission structure according to any one of claims 1 to 10.

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