Gearbox of returning machine

Abstract

The utility model provides a gearbox of a returning machine, which is assembled on a frame of a harvester and is in transmission connection with an engine. Comprising a gearbox shell, a driving shaft in transmission connection with an engine, a driving gear set arranged on the driving shaft in a sleeving mode, a driven shaft parallel to the driving shaft and in transmission connection with a field returning machine, a driven gear set arranged on the driven shaft in a sleeving mode and a shifting fork assembly arranged on the driving shaft in a sleeving mode. The end, connected with the engine, of the driving shaft penetrates through the gearbox shell. One end, connected with the returning machine, of the driven shaft penetrates through the gearbox shell; the driven gear set and the driven shaft rotate integrally, and the driven gear set is in transmission connection with the driving shaft gear set; the shifting fork assembly controls the driving gear set to rotate, so that power transmission from the driving gear set to the driven gear set is achieved, transmission from the driving gear set to the driven shaft is achieved, and then the field returning machine is controlled to work. According to the gearbox of the returning machine, the control effect of the returning machine can be improved, and oil consumption can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical manufacturing field especially a still field machine gearbox. BACKGROUND

[0002] Still field machine as the important function accessory of harvester, can realize the process of crop harvesting, still field, still field machine is assembled on the harvester, becomes the standard configuration of the harvester factory. But due to the soil property and the need of crop planting in some areas, the process of soil still field is not needed, and due to the large power of still field machine, and directly connected with engine transmission, it is easy to cause engine overload, start out flame condition. To meet the needs of users, the conventional harvester on the market, when facing the operation requirement that does not need still field, often chooses to remove still field machine transmission belt, if the still field machine belt is removed, but part of the user needs still field function, then need to reinstall, affect the operation efficiency, this way can only execute still field or not still field single operation, not adapt to various harvesting demand. Therefore, it is urgent to provide a still field machine gearbox with switchable power to control the operation of the still field machine to overcome the defects in the above. SUMMARY

[0003] The utility model aims at providing a still field machine gearbox, which can improve the operation efficiency of the harvester by switching the operation mode of the still field machine during the operation of the harvester.

[0004] According to one aspect of the utility model, a still field machine gearbox is provided, which is assembled on the frame of a harvester and connected with an engine for transmission, and comprises a gearbox shell, a driving shaft, a driving gear set, a driven shaft, a driven gear set and a shift fork assembly. The driving shaft is connected with the engine for transmission, one end of the driving shaft connected with the engine penetrates through the gearbox shell, and the driving gear set is sleeved on the driving shaft. The driven shaft is arranged in parallel with the driving shaft and connected with the still field machine for transmission, one end of the driven shaft connected with the still field machine penetrates through the gearbox shell, the driven gear set is sleeved on the driven shaft and rotates integrally with the driven shaft, and the driven gear set is connected with the driving gear set for transmission. The shift fork assembly is sleeved on the driving shaft to control the rotation of the driving gear set, so as to realize the power transmission from the driving gear set to the driven gear set and the power transmission from the driving shaft to the driven shaft, thereby controlling the operation of the still field machine.

[0005] The shift fork assembly adjusts the transmission connection relationship between the driving gear set and the driven gear set, realizes the power conversion between the driving gear set and the driven gear set inside the still field machine gearbox, can flexibly select the working state of the still field machine according to the operation condition of the harvester, and improves the adaptability and operation reliability of the harvester.

[0006] Preferably, the driving gear set comprises a driving gear, a first inter-shaft bearing sleeved on the driving shaft, and a first spline rotating synchronously with the driving shaft; the driving gear is sleeved on the first inter-shaft bearing; the end of the driving gear away from the engine is provided with a driving spline.

[0007] Preferably, a first inter-shaft tube is sleeved on the driving shaft at the side of the driving gear close to the engine; a second inter-shaft tube is sleeved on the driving shaft at the side of the driving gear away from the engine; the second inter-shaft tube is sleeved with the first spline and the driving spline; the first spline is connected with the driving spline.

[0008] Preferably, the shift fork assembly comprises a shift fork connected in transmission with the driving gear set, a toothed sleeve connected in transmission with the first spline and the driving spline, and a driving member driving the shift fork to translate on the first spline and the driving spline; the shift fork is connected with the toothed sleeve, and the toothed sleeve is connected with the driving spline and the first spline.

[0009] The toothed sleeve is connected with the driving spline and the first spline, thereby improving the reliability of the power connection between the driving shaft and the driven shaft inside the gearbox of the ridger.

[0010] Preferably, the driven gear set comprises a driven gear meshing with the driving gear, and a third inter-shaft tube; the third inter-shaft tube is sleeved on the side of the driven gear close to the direction in which the ridger is located.

[0011] Preferably, the end of the driving shaft connected with the first spline is provided with a spline seat, and the first spline is meshed with the spline seat; the spline seat rotates integrally with the driving shaft; the second inter-shaft tube is sleeved on the end of the spline seat close to the engine.

[0012] Preferably, the driving shaft is provided with a first fixed bearing and a second fixed bearing close to the inner side of the gearbox housing, so as to limit the position of the driving shaft; the driven shaft is provided with a third fixed bearing and a fourth fixed bearing close to the inner side of the gearbox housing, so as to limit the position of the driven shaft.

[0013] Preferably, the driving member comprises a shift fork shaft arranged in parallel with the driving shaft; the shift fork comprises a fixed end sleeved on the shift fork shaft; the two ends of the shift fork shaft are fixed with the gearbox housing.

[0014] Preferably, the gearbox further comprises a gearbox venting assembly, and the gearbox venting assembly comprises a venting plug communicated with the gearbox housing, and a venting plug oil seal arranged on the lower side of the venting plug.

[0015] Preferably, one end of the driving shaft penetrating through the gearbox housing is provided with a first oil seal seat, and a first oil seal is arranged between the first oil seal seat and the first fixed bearing; one end of the driven shaft penetrating through the gearbox housing is provided with a second oil seal seat, and a second oil seal is arranged between the second oil seal seat and the third fixed bearing.

[0016] The still field machine gearbox can be arranged between the engine and the still field machine, and can timely realize power switching between the still field machine and the engine, reduces the harvester oil consumption during non-still field operation. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model makes further detailed explanation in combination with the drawings and specific embodiment:

[0018] Figure 1 A perspective view of the still field machine gearbox is provided.

[0019] Figure 2 A plan view of the still field machine gearbox is provided.

[0020] Figure 3 A sectional view along the direction of AA1 is provided.

[0021] Figure 4 A front view of the still field machine gearbox is provided.

[0022] Figure 5 A sectional view along the direction of BB1 is provided.

[0023] Figure 6 A right view of the still field machine gearbox is provided.

[0024] Figure 7 A sectional view along the direction of CC1 is provided.

[0025] Figure 8 A transmission structure schematic view of the still field machine gearbox is provided.

[0026] Figure 9 A driving shaft and driving gear set structure schematic view is provided.

[0027] Figure 10 A shift fork assembly structure schematic view is provided.

[0028] BRIEF DESCRIPTION OF DRAWINGS

[0029] 100 - tiller transmission; 1 - transmission housing; 2 - driving shaft; 21 - spline seat; 22 - first fixed bearing; 23 - second fixed bearing; 24 - first oil seal seat; 25 - first oil seal; 3 - driving gear set; 31 - driving gear; 32 - driving spline; 33 - first inter-shaft bearing; 34 - first spline; 351 - first inter-shaft tube; 352 - second inter-shaft tube; 4 - driven shaft; 41 - third fixed bearing; 42 - fourth fixed bearing; 43 - second oil seal seat; 44 - second oil seal; 5 - driven gear set; 51 - driven gear; 52 - third inter-shaft tube; 6 - shift fork assembly; 61 - shift fork; 611 - fixed end; 62 - toothed sleeve; 63 - driving member; 631 - shift fork shaft; 7 - breather assembly; 71 - breather plug; 72 - breather plug oil seal. DETAILED DESCRIPTION

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description only represent some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0031] In order to make the drawing simple, only the parts related to the present application are shown in the drawings, which do not represent the actual structure of the product. In addition, in order to make the drawing simple and easy to understand, in some drawings, only one of the parts with the same structure or function is shown, or only one of them is marked. In this paper, "one" not only means "only one", but also means "more than one".

[0032] It should be further understood that the term "and / or" used in the specification and claims of the present application means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0033] In this paper, it should be noted that unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] In addition, in the description of the present application, the terms "first", "second" and the like are only used for differentiation and description, and cannot be understood as indicating or implying relative importance.

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0036] During harvester operation, users often choose between two modes: harvesting while returning the crop to the ground, or harvesting without returning the crop to the ground. When choosing the latter, there are two ways to configure the crop-returning mechanism: one is to disconnect the power connection between the crop-returning mechanism and the transmission components, usually by removing the drive belt; the other is to retract the crop-returning mechanism onto the harvester's chassis, preventing it from contacting the ground. However, in this case, although the crop-returning mechanism is not working, it still maintains its operating mode, resulting in fuel consumption. This embodiment provides a crop-returning mechanism gearbox, mounted on the harvester frame. The gearbox is connected to the engine and the crop-returning mechanism's transmission. By disconnecting the power connection between the crop-returning mechanism and the harvester's engine, it reduces the harvester's fuel consumption, improves harvester efficiency, reduces crop harvesting costs, and also reduces the likelihood of stalling due to insufficient power output.

[0037] See Figures 1 to 10As shown, the trowel gearbox in this embodiment includes a gearbox housing 1 protecting the transmission components, a drive shaft 2, a drive gear set 3, a driven shaft 4, a driven gear set 5, and a shift fork assembly 6 for power switching. The drive shaft 2 is connected to the engine and extends through the gearbox housing 1. Engine power is input through the drive shaft 2 and transmitted within the gearbox housing 1 to the trowel. The drive gear set 3 is mounted on the drive shaft 2 and includes a drive gear 31, a first inter-shaft bearing 33 mounted on the drive shaft 2, and a first spline 34 that rotates synchronously with the drive shaft 2. The first spline 34 is mounted on one end of the drive shaft 2, and the drive gear 31 is mounted on the first inter-shaft bearing 33. A drive spline 32 is located on the side of the first drive shaft 2 away from the engine and is integrally formed with the drive gear 31. The drive spline 32 and the first spline 34 are driveably connected. The drive spline 32 is located on the side of the drive gear 31 away from the engine and rotates synchronously with the drive gear 31. One end of the driven shaft 4 is connected to the reaming machine via a transmission, and the driven shaft 4 passes through the gearbox housing 1 and is arranged parallel to the drive shaft 2. The driven gear set 5 is sleeved on the driven shaft 4 and rotates integrally with the driven shaft 4. The driven gear set 5 is connected to the drive gear set 3 via a transmission, outputting the power input from the engine on the drive shaft 2 to the driven shaft 4, thereby driving the reaming machine to operate. The driven gear set 5 includes a driven gear 51 that meshes with the drive gear 31 and a third inter-shaft tube 52. The third inter-shaft tube 52 is sleeved on the side of the driven gear 51 closer to the direction of the reaming machine, and is used to limit the rotational position of the driven gear 51 on the driven shaft 4, so that the drive gear 31 can stably transmit the engine power to the driven gear 51. The shift fork assembly 6 is used to control the power transmission from the drive shaft 2 to the driven shaft 4. The shift fork assembly 6 is sleeved on the drive shaft 2, with the direction of the trowel installation position as the left side. The shift fork assembly 6 is set on the drive shaft 2 and located to the left of the drive gear 31. The shift fork assembly 6 drives the drive gear 31 to rotate with the drive shaft 2. The drive gear 31 transmits power to the driven gear 5, realizing the process of transmitting engine power to the driven shaft 4, thereby realizing the process of the engine driving the trowel operation. The shift fork assembly 6 controls the transmission of engine power.

[0038] In a specific implementation, the first inter-shaft bearing 33 on the drive shaft 2 is loosely fitted onto the drive shaft 2, while a first spline 34 is provided at the end of the drive shaft 2 furthest from the engine. The drive spline 32 is connected to the first spline 34 in a transmission manner. Since the drive spline 32 is connected to the drive gear 31, the drive gear 31 and the drive spline 32 can be integrally set. When the drive spline 32 rotates, it drives the drive gear 31 to rotate synchronously. The shift fork assembly 6 drives the drive spline 32 to be connected to the first spline 34 in a transmission manner, so that during the rotation of the drive shaft 2, the first spline 34 and the drive shaft 2 rotate together. Since the first inter-shaft bearing 33 is loosely fitted onto the drive shaft 2, and the drive gear 31 is fitted onto the first inter-shaft bearing 33, when the shift fork assembly 6 does not connect the drive spline 32 to the first spline 34 in a transmission manner, the drive gear 31 does not rotate with the drive shaft 2, and therefore the engine power cannot be transmitted to the reamer. At the same time, a first inter-shaft tube 351 is provided to limit the position of the first inter-shaft bearing 33, so that the rotation of the drive gear 31 is reliable. When the shift fork assembly 6 controls the transmission connection between the active spline 32 and the first spline 34, the active spline 32 rotates with the first spline 34, and then the active gear 31 rotates to drive the driven gear 51 to rotate. The driven shaft 4, which rotates synchronously with the driven gear 51, transmits power to the reaping machine.

[0039] In this embodiment, a second inter-shaft tube 352 is fitted onto the end of the drive shaft 2 furthest from the engine. The second inter-shaft tube 352 is mounted on a spline seat 21, and the first spline 34 and the drive spline 32 are fitted onto it. A spline seat 21 is located at the end of the drive shaft 2 connected to the first spline 34, and the second inter-shaft tube 352 is fitted onto the side of the spline seat 21 closest to the drive shaft 2. The first spline 34 meshes internally with the spline seat 21, so the spline seat 21 rotates synchronously during the rotation of the drive shaft 2. Since the first spline 34 and the drive spline 32 are fitted onto the second inter-shaft tube 352, when the first spline 34 is not connected to the drive spline 32, the drive spline 32 is in a free-spinning state, and thus the drive gear 31 remains stationary and cannot drive the driven gear 51 to rotate. The purpose of setting up the spline seat 21 is to ensure a reliable transmission connection between the drive shaft 2 and the first spline 34. Therefore, the spline seat 21 meshes with the internal gear ring of the first spline 34, and the drive shaft 2 rotates to drive the first spline 34. However, when the shift fork assembly 6 does not shift to make the first spline 34 and the drive spline 32 connect, the drive spline 32 is always in a free-spinning state on the drive shaft 2. As a result, the drive shaft 2 cannot transmit power to the driven shaft 4, and the reaming machine does not work.

[0040] The shift fork assembly 6 controls the engine to output power to the reamer. Specifically, the shift fork assembly 6 is mounted on the main drive shaft, driving the drive spline 32 to connect with the first spline 34. The shift fork assembly 6 includes a shift fork 61 connected to the drive gear 31, a gear sleeve 62 connecting the first spline 34 and the drive spline 32, and a drive member 63 that drives the gear sleeve 62 to translate. The gear sleeve 62 is fitted between the drive spline 32 and the first spline 34. The shift fork moves the gear sleeve 62 to connect the drive spline 32 and the first spline 34, realizing the transmission of engine power between the drive shaft 2 and the driven shaft 4. The shift fork 61 is controlled by the drive member 63 to move the gear sleeve 62 between the drive spline 32 and the first spline 34, completing the transmission connection between the first spline 34 and the drive spline 32. The drive unit 63 includes a shift fork shaft 631 arranged parallel to the drive shaft 2. The fixed end 611 of the shift fork 61 is sleeved on the shift fork shaft 631 and connected to the shift fork shaft 631. The shift fork shaft 631 controls the shift fork 61 to change the transmission connection state of the first spline 34 and the drive spline 32. Both ends of the shift fork shaft 631 are fixed to the gearbox housing 1 to prevent the position of the shift fork shaft 631 from changing during operation and affecting the sensitivity of shifting the shift fork 61.

[0041] In this embodiment, the driven gear 51 group is provided with a third inter-shaft tube 52. According to the setting position of the shift fork assembly 6, the third inter-shaft tube 52 is sleeved on the driven shaft 4 on the side of the driven gear 51 that is close to the setting direction of the reamer. The third inter-shaft tube 52 is used to limit the position of the driven gear 51 on the driven shaft 4 and prevent the driven gear 51 from moving and causing abnormal transmission between it and the driving gear 31. To ensure stable and efficient power transmission within the trowel's gearbox during engine power transmission, a first fixed bearing 22 and a second fixed bearing 23 are installed on the inner side of the drive shaft 2 near the gearbox housing 1 to restrict the position of the drive shaft 2. The first fixed bearing 22 is located on the side of the drive shaft 2 closest to the engine, and the second fixed bearing 23 is located on the other side of the drive shaft 2. Similarly, a third fixed bearing 41 and a fourth fixed bearing 42 are installed on the inner side of the driven shaft 4 near the gearbox housing 1. The third fixed bearing 41 is located on the side of the driven shaft 4 closest to the trowel, and the fourth fixed bearing 42 is located on the other side of the driven shaft 4. The first fixed bearing 22 and the third fixed bearing 41 can be tapered roller bearings, while the second fixed bearing 23 and the fourth fixed bearing 42 are deep groove ball bearings. The second fixed bearing 23 and the fourth fixed bearing 42 are fixedly connected to the gearbox housing 1. The trowel gearbox provided in this embodiment restricts the positions of the drive shaft 2 and the driven shaft 4 through a combination of bearings, enabling efficient, stable, and reliable transmission control during the transmission of engine power to the trowel.

[0042] In a preferred embodiment, see Figure 1The troweling machine's gearbox is also equipped with a gearbox ventilation assembly 7 for heat dissipation and exhaust of the gearbox. The gearbox ventilation assembly 7 is located on the upper side of the gearbox housing 1 and includes a vent plug 71 communicating with the gearbox housing 1 and a vent plug oil seal 72 located below the vent plug 71. The vent plug oil seal 72 is fitted against the inner side of the gearbox housing 1 to prevent lubricating oil from spilling out of the vent plug 71 when friction generates heat between the transmission components during gearbox operation. To ensure smooth operation of the transmission components in the gearbox, a lubrication structure is provided in the gearbox. A first oil seal seat 24 is provided on the inner side of the drive shaft 2 that penetrates the gearbox housing 1, that is, the first oil seal seat 24 is provided on the side of the drive shaft 2 near the engine. A first oil seal 25 is provided between the first oil seal seat 24 and the first fixed bearing 22. A second oil seal seat 43 is provided on the inner side of the driven shaft 4 that penetrates the gearbox housing 1, that is, the second oil seal seat 43 is provided on the side of the driven shaft 4 near the reamer. A second oil seal 44 is provided between the second oil seal seat 43 and the third fixed bearing 41.

[0043] In the embodiments provided by this utility model, the combine harvester gearbox cuts off the power transmission between the drive gear 31 and the driven gear 51 inside the gearbox via the shift fork assembly 6, thus cutting off the power transmission from the engine to the combine harvester. When the harvester is not performing combine harvesting operations, cutting off the engine's power supply to the combine harvester can reduce the harvester's fuel consumption and save production costs while ensuring the safety and reliability of the harvesting operation. At the same time, it can improve the engine's starting efficiency. When the engine's starting power is insufficient, the power output of the combine harvester is first cut off. After the harvester starts normally, the power transmission between the drive gear 31 and the driven gear 51 is realized through the shift fork assembly 6, achieving a smooth transition of engine power.

[0044] 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 cover modifications and variations falling within the scope of the appended claims and their equivalents.

Claims

1. A shovel gearbox, mounted on the harvester frame and connected to the engine drive, characterized in that, include: Gearbox housing; A drive shaft, which is connected to the engine drive, with one end of the drive shaft connected to the engine penetrating through the gearbox housing; A drive gear set, wherein the drive gear set is sleeved on the drive shaft; A driven shaft is arranged parallel to the drive shaft and is connected to the reamer for transmission. One end of the driven shaft connected to the reamer passes through the gearbox housing. The driven gear set is sleeved on the driven shaft and rotates integrally with the driven shaft, and the driven gear set is connected to the driving shaft gear set for transmission. A shift fork assembly is sleeved on the drive shaft to control the rotation of the drive gear set, thereby realizing the power transmission from the drive gear set to the driven gear set, realizing the power transmission from the drive shaft to the driven shaft, and thus controlling the operation of the reaming machine.

2. The field-returning machine gearbox as described in claim 1, characterized in that, The drive gear set includes a drive gear, a first inter-shaft bearing sleeved on the drive shaft, and a first spline that rotates synchronously with the drive shaft; the drive gear is sleeved on the first inter-shaft bearing; and a drive spline is provided at the end of the drive gear away from the engine.

3. The shunting machine gearbox as described in claim 2, characterized in that, A first inter-shaft tube is fitted on the side of the drive gear closest to the engine on the drive shaft, and a second inter-shaft tube is fitted on the other side of the drive gear away from the engine on the drive shaft. A first spline and a drive spline are fitted on the second inter-shaft tube, and the first spline is connected to the drive spline.

4. The shunting machine gearbox as described in claim 3, characterized in that, The shift fork assembly includes a shift fork that is driven by the drive gear set, a gear sleeve that connects the first spline and the drive spline, and a drive member that drives the shift fork to translate on the first spline and the drive spline; the shift fork is connected to the gear sleeve, and drives the gear sleeve to connect the drive spline and the first spline.

5. A shovel gearbox as described in claim 4, characterized in that, The driven gear set includes a driven gear that meshes with the driving gear and a third inter-shaft tube; the third inter-shaft tube is sleeved on the side of the driven gear closer to the direction of the reamer.

6. The sizing machine gearbox as described in claim 5, characterized in that, A spline seat is provided at one end of the drive shaft connected to the first spline, and the first spline meshes with the spline seat; the spline seat rotates integrally with the drive shaft; the second inter-shaft tube is sleeved at the end of the spline seat near the engine.

7. A shovel gearbox as described in claim 6, characterized in that, The drive shaft is provided with a first fixed bearing and a second fixed bearing on the inner side near the gearbox housing to define the position of the drive shaft; the driven shaft is provided with a third fixed bearing and a fourth fixed bearing on the inner side near the gearbox housing to define the position of the driven shaft.

8. A shunting machine gearbox as described in claim 7, characterized in that, The drive component includes a shift fork shaft arranged parallel to the drive shaft. The shift fork includes a fixed end, which is sleeved on the shift fork shaft. Both ends of the shift fork shaft are fixed to the gearbox housing.

9. A shovel gearbox as described in claim 8, characterized in that, It also includes a transmission venting assembly, which includes a vent plug communicating with the transmission housing and a vent plug oil seal disposed on the lower side of the vent plug.

10. A shovel gearbox as described in claim 9, characterized in that, The drive shaft is provided with a first oil seal seat at one end through the gearbox housing, and a first oil seal is provided between the first oil seal seat and the first fixed bearing; the driven shaft is provided with a second oil seal seat at one end through the gearbox housing, and a second oil seal is provided between the second oil seal seat and the third fixed bearing.

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