阅读说明：本技术 输送槽轴正反转装置以及使用其的机器 (Conveying groove shaft forward and backward rotating device and machine using same ) 是由 宋来辉 周良田 时东园 王国栋 宫学良 王英锋 于 2019-11-07 设计创作，主要内容包括：本发明涉及输送槽轴正反转装置以及使用其的机器。该输送槽轴正反转装置包括连接轴装置、驱动轴装置、变向装置和分离装置,所述连接轴装置能够从外部接收动力,所述驱动轴装置能够向所述输送槽轴正反转装置外传递动力；所述连接轴装置能够与所述驱动轴装置相连接,从而动力直接从所述连接轴装置传动给所述驱动轴装置,所述分离装置能够使所述连接轴装置与所述驱动轴装置断开连接,并能够使所述连接轴装置通过所述变向装置向所述驱动轴装置提供动力,使得所述驱动轴装置的轴的转动方向与所述连接轴装置的轴的转向相反。(The invention relates to a forward and reverse rotation device of a conveying groove shaft and a machine using the forward and reverse rotation device. The conveying groove shaft forward and reverse rotation device comprises a connecting shaft device, a driving shaft device, a direction changing device and a separating device, wherein the connecting shaft device can receive power from the outside, and the driving shaft device can transmit power to the conveying groove shaft forward and reverse rotation device; the connecting shaft means may be connectable with the drive shaft means such that power is transmitted directly from the connecting shaft means to the drive shaft means, and the decoupling means may disconnect the connecting shaft means from the drive shaft means and may cause the connecting shaft means to provide power to the drive shaft means via the direction changing means such that the direction of rotation of the shaft of the drive shaft means is opposite to the direction of rotation of the shaft of the connecting shaft means.)

1. A positive and negative rotation device of a conveying groove shaft, which is characterized in that,

the conveying groove shaft forward and backward rotating device comprises a connecting shaft device, a driving shaft device, a turning device and a separating device,

the connecting shaft device can receive power from the outside, and the driving shaft device can transmit power to the outside of the conveying groove shaft forward and backward rotating device;

the connecting shaft means being connectable to the drive shaft means such that power is transmitted directly from the connecting shaft means to the drive shaft means,

the decoupling means is capable of decoupling the connecting shaft means from the drive shaft means and of powering the drive shaft means via the deviator means such that the direction of rotation of the shaft of the drive shaft means is opposite to the direction of rotation of the shaft of the connecting shaft means.

2. The conveyor shaft counter-rotating apparatus according to claim 1, wherein said direction changing means includes a driven shaft assembly and an intermediate shaft assembly,

the connecting shaft device is provided with a connecting gear, the driving shaft device is provided with a driving gear,

the driven shaft assembly having a first gear and a second gear connected by a shaft, the countershaft assembly having a countershaft gear,

the first gear is connected with the connecting gear, and the second gear is connected with the intermediate shaft gear;

the countershaft gear may be connected with the drive gear.

3. A feed chute shaft counter-rotating apparatus as claimed in claim 2, wherein said drive shaft means includes a connecting gear sleeve on which said drive gear is disposed, said connecting gear sleeve having a sleeve to which a connecting shaft of said connecting shaft means is connected to connect said connecting shaft means with said drive shaft means.

4. A feed chute shaft counter-rotating apparatus as claimed in claim 2, wherein said separating means is capable of bringing said drive shaft means into a first position in which said drive shaft means is separated from said connecting shaft means and said counter shaft gear is not connected to said drive gear, and a second position in which said drive shaft means is separated from said connecting shaft means and said counter shaft gear is connected to said drive gear.

5. A trough shaft counter-rotating apparatus according to claim 3, wherein the sleeve has a connecting portion for connecting to the separating means.

6. A feed chute shaft counter-rotating apparatus according to claim 1, wherein said separating means comprises a fork and a handle weld connected by a shaft, said handle weld receiving a force from the outside, said fork being adapted to be connected to said drive shaft means to change the position of said drive shaft means.

7. The conveyor run shaft counter-rotating apparatus as in claim 6 wherein said separating means further comprises a stop means mounted on said handle welds for fixing the position of said handle welds.

8. The conveying trough shaft forward and reverse rotating device according to claim 7, wherein the conveying trough shaft forward and reverse rotating device comprises a gear box, the gear box comprises a left gear box and a right gear box, a hole is arranged at a preset position on the gear box,

the limiting device comprises a limiting shaft, the limiting shaft comprises a rod part, the rod part is provided with a bending part and a straight part, the bending part can be stressed conveniently, the straight part is used for fixing the limiting shaft in the hole on the gearbox body,

the shifting fork is located in the gear box body, and the handle is welded outside the gear box body.

9. The transport tub shaft forward/reverse rotation apparatus as claimed in claim 1, further comprising a driving wheel for receiving power to rotate the shaft of the intermediate shaft device and a fixing plate for fixing the transport tub shaft forward/reverse rotation apparatus to a machine using the transport tub shaft forward/reverse rotation apparatus, the connecting shaft device, the driving shaft device and the direction changing device each having a bearing for support.

10. A machine using the transport trough shaft counter-rotating device of any one of claims 1 to 9.

Technical Field

The technical scheme relates to a forward and reverse rotation device, in particular to a forward and reverse rotation device of a driving shaft of a conveying groove of a harvester.

Background

With the development of modern agriculture, the agricultural production is developed towards centralized and comfortable operation. In the working process of the harvester cutting table, particularly when lodging crops are harvested, the crops are easy to block, wind, block or collect foreign matters in the conveying groove.

In this case, the conveyance groove needs to be reversed to discharge the clogging material. In the prior art, the engine is required to be shut off firstly in the process of removing the blockage problem, then the belt pulley of the power input source is manually rotated reversely by hands or crowbars, and the blockage is spitted and scattered.

Disclosure of Invention

The present invention has been made in view of the above circumstances to overcome one or more of the problems in the prior art, and to provide at least one advantageous alternative.

According to one aspect of the invention, the conveying groove shaft forward and reverse rotation device comprises a connecting shaft device, a driving shaft device, a direction changing device and a separating device, wherein the connecting shaft device can receive power from the outside, and the driving shaft device can transmit power to the conveying groove shaft forward and reverse rotation device; the connecting shaft means may be connectable with the drive shaft means such that power is transmitted directly from the connecting shaft means to the drive shaft means, and the decoupling means may disconnect the connecting shaft means from the drive shaft means and may cause the connecting shaft means to provide power to the drive shaft means via the direction changing means such that the direction of rotation of the shaft of the drive shaft means is opposite to the direction of rotation of the shaft of the connecting shaft means.

According to one embodiment, the deviator comprises a driven shaft assembly having a connecting gear thereon, a driving gear thereon, and an intermediate shaft assembly having a first gear and a second gear connected by a shaft, the intermediate shaft assembly having an intermediate shaft gear, the first gear being connected to the connecting gear and the second gear being connected to the intermediate shaft gear; the countershaft gear may be connected with the drive gear.

According to one embodiment, the drive shaft arrangement comprises a coupling gear sleeve on which the drive gear is arranged, the coupling gear sleeve having a sleeve, with which a coupling shaft of the coupling shaft arrangement is connected, so that the coupling shaft arrangement is connected to the drive shaft arrangement.

According to one embodiment, the decoupling device can bring the drive shaft device into a first position, in which the drive shaft device is decoupled from the connecting shaft device and the intermediate shaft gear is not connected to the drive gear, and in a second position, in which the drive shaft device is decoupled from the connecting shaft device and the intermediate shaft gear is connected to the drive gear.

According to one embodiment, the sleeve has a connection for connection to the separating device.

According to one embodiment, the separating device comprises a fork and a handle weld connected by a shaft, the handle weld being able to receive the action of force from the outside, the fork being intended to be connected to the drive shaft device in order to change the position of the drive shaft device.

According to one embodiment, the separating device further comprises a limiting device mounted on the handle weld for fixing the position of the handle weld.

According to one embodiment, the forward and reverse rotation device of the conveying groove shaft comprises a gear box, the gear box comprises a left gear box and a right gear box, a hole is arranged at a preset position on the gear box,

the limiting device comprises a limiting shaft, the limiting shaft comprises a rod part, the rod part is provided with a bending part and a straight part, the bending part can be stressed conveniently, the straight part is used for fixing the limiting shaft in the hole on the gearbox body,

the shifting fork is located in the gear box body, and the handle is welded outside the gear box body.

According to one embodiment, the conveying groove shaft forward and reverse rotation device further comprises a driving wheel and a fixing plate, the driving wheel is used for receiving power to enable the shaft of the middle shaft device to rotate, the fixing plate is used for fixing the conveying groove shaft forward and reverse rotation device to a machine using the conveying groove shaft forward and reverse rotation device, and the connecting shaft device, the driving shaft device and the direction changing device are respectively provided with a bearing for supporting.

According to one embodiment, the conveyor tub shaft forward and reverse rotation device further includes a bearing (left side bearing) supporting the intermediate shaft and a bearing (right side bearing) supporting the drive shaft, the number of the left side bearings being greater than the number of the right side bearings.

According to another aspect of the invention, a machine is provided which uses the conveyor grooved shaft counter-rotating device of any one of the above.

According to some technical schemes of the invention, the reverse rotation of the output shaft can be easily completed.

According to some technical schemes of the invention, the forward rotation, neutral gear and reverse rotation three-gear adjustment can be realized by adjusting the handle, so that the time and labor are saved.

Drawings

The present invention may be more clearly understood in conjunction with the accompanying drawings, which are not to scale, and which do not show elements which are not relevant to the understanding of the present invention.

FIG. 1 is a schematic view of a harvester transport trough shaft counter-rotating device according to an embodiment of the invention.

Fig. 2 shows a schematic structural view of a drive shaft assembly 1 according to an embodiment of the invention.

Fig. 3 shows a schematic structural view of the driven shaft assembly 2 according to an embodiment of the invention.

Fig. 4 shows a schematic illustration of the construction of the intermediate shaft arrangement 3 according to an embodiment of the invention.

Fig. 5 shows a schematic structural view of a fork handle assembly 4 according to an embodiment of the invention.

FIG. 6 is a schematic diagram illustrating the cooperative relationship of components in forward rotation, according to an embodiment of the present invention.

Fig. 7 shows a schematic diagram of the cooperation of the components during idling, viewed from one direction, according to an embodiment of the invention.

Fig. 8 shows a schematic diagram of the cooperation of the components during idling, viewed from another direction, according to an embodiment of the invention.

FIG. 9 is a diagram illustrating the cooperative relationship of components in a reverse rotation, in accordance with one embodiment of the present invention.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. Components that may be used in practice but are not relevant for the understanding of the present patent and the technical problem to be solved have been omitted from the description.

FIG. 1 is a schematic view of a harvester transport trough shaft counter-rotating device according to an embodiment of the invention. As shown in figure 1, according to one embodiment of the invention, the forward and reverse rotation device of the conveying grooved shaft of the harvester comprises a driving shaft assembly 1, a driven shaft assembly 2, an intermediate shaft assembly 3, a shifting fork handle assembly 4, a right gear box 5, a left gear box 6, a driving wheel 7, a fixing plate 8, an oil plug 9 and a key 10.

The fixing plate 8 is used for fixing the forward and reverse rotating device of the conveying shaft to an agricultural machine, and a harvester is taken as an example of the agricultural machine in the invention. The drive wheels 7 are used to receive power from the engine (not shown) of the agricultural machine. Power may be received in various ways. In one embodiment, power is received by an engine of the belt follower. In this embodiment, the drive wheel 7 is a drive pulley.

The right gear case 5 and the left gear case 6 form a closed space in which the drive shaft assembly 1, the driven shaft assembly 2, and the intermediate shaft assembly 3 are disposed. The fork handle assembly 4 is mounted on the housing and is connected to the drive shaft assembly 1 through a hole provided in the housing, as will be described in detail later.

Oil can be supplied to the components in the sealed space through the oil plug 9. The plug 9, the operation of the various refuelings through the plug 9, and the various lines provided for the refuelings can be implemented in various ways that are now known and will be known to those skilled in the art in the future and will not be described in detail herein.

The flat key 10 is used to connect the drive wheel 7 with the drive shaft assembly 1 so that power from the drive shaft 7 can be transmitted to the drive shaft assembly 1.

Fig. 2 shows a schematic structural view of a drive shaft assembly 1 according to an embodiment of the invention. As shown in fig. 2, according to an embodiment of the present invention, a driving shaft assembly 1 includes a connecting gear sleeve 1-1, a connecting shaft 1-2, a gear 1-3, a compression spring 1-4, an output shaft 1-5, an internal snap spring 1-6, a bearing 1-7, a key 1-8, and a sleeve 1-9.

The bearings 1-7 are used to mount the drive shaft assembly 1 on the harvester. The bearings 1-7 are usually in a plurality and mounted at a distance. Thereby preventing unnecessary shaking of the bearing. In the illustrated embodiment, the number of bearings (left side bearings) on the side close to the drive wheel 7 (left side in the drawing) is larger than the number of bearings (right side bearings) on the right side, so that the shaft rattling can be reduced more effectively.

The output shafts 1-5 are used to transmit power to a feed system (i.e., an example of the present invention other than a trough shaft counter-rotating device), such as a trough (not shown). The local connection means, in the right part of the figure, can be connected to the feed system. As shown in the figure, the left side part of the gear box is provided with a mounting part which can be sequentially provided with a connecting gear sleeve 1-1, a pressure spring 1-4, an inner snap spring 1-6 and a right side bearing 1-7. The inner snap spring 1-6 and the pressure spring 1-4 are arranged in a sleeve connected with the gear sleeve 1-1. The inner snap spring 1-6 is used for limiting the right bearing 1-7. The output shaft 1-5, the connecting gear sleeve 1-1, the pressure spring 1-4, the inner snap spring 1-6 and the right bearing 1-7 form an embodiment of the driving shaft device.

The left bearing 1-7 supports the connecting shaft 1-2. The connecting shaft 1-2 has a connecting portion to receive power from the driving wheel 7 through the flat key 10 to rotate. The connection of the connecting shaft 1-2 to the driving wheel 7 via the flat key 10 is known to those skilled in the art, and various methods may be adopted, and even connection manners other than the flat key 10 may be adopted, which are not described herein. The connecting shaft 1-2 can be meshed with the connecting gear sleeve 1-1 through splines.

The gear 1-3 is arranged on the connecting shaft 1-2. And is connected to the intermediate shaft assembly 3. As will be described in more detail later.

The connecting shaft 1-2, the gear 1-3, the left bearing 1-7, the key 1-8, and the sleeve 1-9 constitute one embodiment of the connecting shaft arrangement of the present invention.

During normal operation, the intermediate shaft 1-2 is connected with the driving shaft 1-5 through the sleeve connected with the gear sleeve 1-1. Therefore, when the driving wheel 7 rotates forwards, the middle shaft 1-2 is driven to rotate forwards by the driving wheel 7, and the middle shaft further drives the driving shaft 1-5 to rotate forwards.

In the normal rotation, although the gear 1-3 and the coupling sleeve gear 1-1 are both rotated, they do not function as a coupling, and thus power is directly transmitted to the drive shaft 1-5. That is, the power transmission path for the forward rotation is: drive pulley 7 → gear 1-3 → connecting gear sleeve 1-1 → output shaft 1-5. The output shaft 1-5 and the connecting shaft 1-2 run in the same direction.

In reverse rotation, the intermediate shaft 1-2 is disconnected from the sleeve connecting the gear sleeve 1-1, so that it is not directly connected to the drive shaft 1-5, but indirectly connected to the drive shaft 1-5 via the driven shaft assembly 2 and the intermediate shaft assembly 3, so that the drive shaft 1-5 is reversed, as will be described in detail below.

Fig. 3 shows a schematic structural view of the driven shaft assembly 2 according to an embodiment of the invention. As shown in fig. 3, the driven shaft assembly 2 includes a driven shaft 2-1, a gear 2-2, a sleeve 2-3, a key 2-4, and a bearing 2-5 according to an embodiment of the present invention. Fig. 4 shows a schematic illustration of the construction of the intermediate shaft arrangement 3 according to an embodiment of the invention. As shown in FIG. 4, according to one embodiment of the present invention, the countershaft assembly 3 includes a countershaft 3-1, a gear 3-2, a gear 3-3, a bushing 3-4, a key 3-5, and a bearing 3-6. The driven shaft assembly 2 and the intermediate shaft assembly 3 constitute one embodiment of the deviator of the invention.

As shown in fig. 3 and 4, the gear 3-2 of the intermediate shaft assembly 3 is connected with the gear 1-3 of the drive shaft assembly 1. In one embodiment, gear 3-2 is connected to gear 1-3 of drive shaft assembly 1, whether it is desired to rotate the output shaft in a forward direction or in a reverse direction. The bearings 3-6 are used to mount the intermediate shaft assembly 3 on the harvester. The bush 3-4 and the key 3-5 play a limiting role, and are arranged on the intermediate shaft 3-1 together with the gear 3-2 and the gear 3-3. The gear 3-3 is used to connect with the gear 2-2 of the driven shaft assembly 2 shown in fig. 2, thereby transmitting power to the gear 2-2. The gear 2-2 is connected with a gear on a connecting gear sleeve 1-1 of the driving shaft assembly 1, and then power is transmitted to the driving shaft 1-5, so that the driving shaft 1-5 is reversely rotated.

The bearing 2-5 of the driven shaft assembly 2 is used for fixing the driven shaft assembly 2 on the harvester, and the sleeve 2-3 and the key 2-4 have limiting functions and are arranged on the driven shaft 2-1 together with the gear 2-2.

Thus, at the time of reverse rotation, the power transmission route is: the driving wheel 7 → the gear 1-3 is meshed with the gear 3-2 → the gear 3-3 is meshed with the gear 2-2 → the gear 2-2 is meshed with the gear on the connecting gear sleeve 1-1 → the connecting gear sleeve 1-1 drives the output shaft 1-5 to run, and the output shaft 1-5 runs in the opposite direction to the connecting shaft 1-2. At the moment, the connecting shaft 1-2 is meshed with the connecting gear sleeve 1-1 without splines.

During reverse rotation, the intermediate shaft 1-2 is disengaged from the connecting gear sleeve 1-1, so that power is not directly transmitted to the drive shaft 1-5, but is transmitted to the gear 3-2 through the gear 1-3 and is indirectly transmitted to the drive shaft 1-5 through the gear 3-3, the gear 2-2 and the gear on the connecting gear sleeve 1-1, thereby realizing reverse rotation of the drive shaft.

The connection and disconnection of the intermediate shaft 1-2 to the connecting gear sleeve 1-1 will be described with reference to fig. 5.

Fig. 5 shows a schematic structural view of a fork handle assembly 4 according to an embodiment of the invention. As shown in FIG. 5, according to one embodiment of the invention, the shifting fork handle assembly 4 comprises a handle welding part 4-1, a pin shaft 4-2, a shifting fork 4-3, a limiting shaft 4-4, a pressure spring 4-5, a flat pad 4-6, a cotter pin 4-7 and a pin 4-8. The fork handle assembly 4 constitutes one embodiment of the release device of the present invention.

The shifting fork 4-3 is sleeved on the connecting gear sleeve 1-1 and can push the connecting gear sleeve 1-1 left and right. The left side of the connecting gear sleeve 1-1 is provided with a connecting part which is connected with (for example sleeved and connected with) the shifting fork 4-3, so that the shifting fork 4-3 can move rightwards under the action of force.

The shifting fork 4-3 is connected with the handle welding 4-1 through the pin shaft 4-2, and the pin 4-8 plays a role in fixing. The handle weld 4-1 is used to receive an external force, such as a force from an operator, thereby moving the shift fork 4-3 to move the coupling gear sleeve 1-1 rightward, thereby disengaging from the intermediate shaft 1-2.

The handle welding joint 4-1 is provided with a limiting shaft 4-4, a pressure spring 4-5, a flat pad 4-6 and a split pin 4-7. The stopper shaft 4-4 has a shaft portion. As shown, the stem portion has a curved portion and a straight portion. The bending part can be stressed conveniently. For example to facilitate gripping by a person. The straight part is used for fixing the limiting shaft, for example, inserting the limiting shaft into a hole reserved on a harvester (such as a gearbox box body). These holes correspond to different operating positions or modes. As described in detail later. The pressure spring 4-5, the flat cushion 4-6 and the split pin 4-7 play a limiting role. The rod and the hole may be square, round, or other shapes, and need to be able to fit each other.

Returning to fig. 1, the pin 4-2 penetrates through the box body formed by the right gear box 5 and the left gear box 6 (for example, through a hole part) and enters the space of the box body, and the handle seam 4-1, the limiting shaft 4-4 and the like are left outside the box body, so that the external force can be conveniently received and the fixing can be conveniently carried out.

FIG. 6 is a schematic diagram illustrating the cooperative relationship of components in forward rotation, according to an embodiment of the present invention. As shown in fig. 6, according to an embodiment of the present invention, the stopper shaft 4-4 is manually pulled up, the adjustment handle 4-1 is welded, and the lower portion of the stopper shaft 4-4 is pulled up to the hole a, so that the device is in a normal operation state, and the shift fork 4-3 does not apply a force to the coupling gear sleeve 1-1 in the right direction (i.e., a force for disengaging from the intermediate shaft 1-2), so that the intermediate shaft 1-2 and the coupling gear sleeve 1-1 are coupled to each other, and the force can be directly transmitted. At the moment, the connecting gear sleeve 1-1 is not connected with the gear 2-2. At the moment, the connecting gear sleeve 1-1 is not pushed by the shifting fork 4-3, and the connecting shaft device is in a normal working position.

As previously mentioned, the force transmission at this time is in the forward path: drive pulley 7 → gear 1-3 → connecting gear sleeve 1-1 → output shaft 1-5, in which split is transmitted from gear 1-3 to → gear 3-2 → gear 3-3 is engaged with gear 2-2, with no output. The output shaft 1-5 and the connecting shaft 1-2 run in the same direction.

Fig. 7 shows a schematic diagram of the cooperation of the components during idling, viewed from one direction, according to an embodiment of the invention. Fig. 8 shows a schematic diagram of the cooperation of the components during idling, viewed from another direction, according to an embodiment of the invention. As shown in fig. 7 and 8, the limiting shaft 4-4 is pulled up manually, and the handle is adjusted to be welded 4-1. The lower part of the limiting shaft 4-4 is shifted to the hole B, so that the gear is in a neutral state. At this time, the shift fork 4-3 applies a certain force (i.e., a force for disengaging from the intermediate shaft 1-2) to the connecting gear sleeve 1-1 to the right, so that the intermediate shaft 1-2 and the connecting gear sleeve 1-1 are disengaged, but at this time, the connecting gear sleeve 1-1 is not connected to the gear 2-2. So that the force of the intermediate shaft 1-2 is transmitted to the gear 2-2 through the gear 1-3, the gear 3-2 and the gear 3-3, but is not transmitted to the drive shaft 1-5. I.e. the neutral path of the force at this time: drive pulley 7 → gear 1-3 meshing with gear 3-2 → gear 3-3 meshing with gear 2-2 → no output. At the moment, the connecting shaft 1-2 is connected with the connecting gear sleeve 1-1 without splines, and power is cut off. The drive shaft arrangement is now in the first position because of the change in position of the coupling gear sleeve 1-1.

FIG. 9 is a diagram illustrating the cooperative relationship of components in a reverse rotation, in accordance with one embodiment of the present invention. The limiting shaft 4-4 is pulled up manually, and the handle is adjusted to be welded 4-1. The lower portion of the stopper shaft 4-4 is shifted to the hole C (see fig. 6), and the shift fork 4-3 applies more rightward force (i.e., force for disengaging from the counter shaft 1-2) to the coupling gear sleeve 1-1, so that the counter shaft 1-2 and the coupling gear sleeve 1-1 are disengaged, and the coupling gear sleeve 1-1 is coupled to the gear 2-2. So that the force of the intermediate shaft 1-2 can be transmitted via the gear wheel 1-3, the gear wheel 3-2, the gear wheel 3-3 to the gear wheel 2-2 and further via the gear wheel connected to the gear wheel housing 1-1 to the drive shaft 1-5. That is, the reverse route is formed at this time: the driving belt pulley 7 → the gear 1-3 is meshed with the gear 3-2 → the gear 3-3 is meshed with the gear 2-2 → the gear 2-2 is meshed with the gear on the connecting gear sleeve 1-1 → the connecting gear sleeve 1-1 drives the output shaft 1-5 to run, and the output shaft 1-5 runs in the opposite direction to the connecting shaft 1-2. At the moment, the connecting shaft 1-2 is meshed with the connecting gear sleeve 1-1 without splines, so that force cannot be directly transmitted to the output shaft 1-5 from the connecting shaft 1-2. The drive shaft assembly is now in the second position because of the change in position of the coupling gear sleeve 1-1.

The pressure spring 1-4 can play a role in resetting, and when the connecting gear sleeve 1-1 is not acted by external force from the shifting fork 4-3, the connecting gear sleeve 1-1 can be pushed to be connected with the connecting shaft 1-2. The compression springs 1-4 constitute one embodiment of the resetting device according to the invention.

Through the scheme, three-gear adjustment of forward rotation, neutral gear and reverse rotation of the output shafts 1-5 can be realized, and time and labor are saved.

Those skilled in the art will readily understand that various modifications may be adopted in the orientation of the technical idea of the present invention, for example, the driving wheel 7 may be replaced with a sprocket instead of the pulley 7. The matching modes of the gear, the chain wheel and the shaft are exchanged by flat keys or splines, so that the protection of the embodiment is not influenced. The use of the forward and reverse device is not limited to the forward and reverse rotation of the conveying groove shaft of the harvester. Other occasions needing to realize the function of forward and reverse rotation also have protection rights.

When the harvester operation, the conveyer trough easily blocks, unable normal work, and at this moment, use this patent device can solve or alleviate this relevant problem. The novel adjustable three-gear adjusting device is novel in structure and convenient to use, can realize three-gear adjustment of forward rotation, neutral gear and reverse rotation through the adjusting handle, and is time-saving and labor-saving.

The following description is merely illustrative of the present invention to enable one of ordinary skill in the art to fully practice the present invention and is not intended to limit the present invention. After reading the description, those skilled in the art can make modifications (such as key connection to spline, pulley drive to sprocket drive, etc.) without inventive contribution to the present embodiment as required. All protected by the patent laws are intended to be covered by the present invention.