CN210461660U

CN210461660U - Agricultural machine and automatic gear shifting device thereof

Info

Publication number: CN210461660U
Application number: CN201920905741.2U
Authority: CN
Inventors: 王新锋; 王佳斌; 吴迪; 姚远
Original assignee: FJ Dynamics Technology Co Ltd
Current assignee: FJ Dynamics Technology Co Ltd
Priority date: 2019-06-15
Filing date: 2019-06-15
Publication date: 2020-05-05
Anticipated expiration: 2029-06-15

Abstract

The utility model discloses an agricultural machine and an automatic gear shifting device thereof, wherein the automatic gear shifting device is used for adjusting the gear meshing position of a gearbox of the agricultural machine, wherein the gearbox comprises a driven gear set having a drive shaft, a shift lever and a shift gear sleeved on the drive shaft and drivably mounted on a shifting end of the shift lever, wherein the automatic gear shifting device comprises an actuator and a swing arm, wherein the swing arm has an adjusting end and a driven end corresponding to the adjusting end, the driven end of the swing arm is drivably mounted to the driver, a free end of the shift lever is drivably mounted to the adjustment end of the swing arm, wherein the swing arm is configured to allow a middle portion of the swing arm to rotate about a fixed axis when the driver drives the driven end of the swing arm.

Description

Agricultural machine and automatic gear shifting device thereof

Technical Field

The utility model relates to an agricultural machine, in particular to agricultural machine and automatic gear shifting device thereof.

Background

Agricultural machinery is a working device widely used in agricultural production, such as but not limited to rice transplanter, tiller, plant protection machine, etc., and the advent of agricultural machinery has greatly improved agricultural production efficiency and reduced labor intensity, and has prompted rapid progress of agricultural production toward mechanization and modernization. In recent years, with the rapid development of scientific technology, especially the rapid development of sensing technology and positioning technology, the development of automated agricultural machinery has been proposed on a routine basis. Different from the existing agricultural machinery, the automatic agricultural machinery based on sensing technology and positioning technology is expected to realize unmanned driving and operation so as to further improve the agricultural production efficiency and reduce the labor intensity. The existing agricultural machine includes a frame body (including a steering wheel or an armrest, and other devices for controlling the direction), and an internal combustion engine, a transmission, a clutch, a shift lever, a set of wheels, a series of transmission mechanisms, and a seat, which are provided to the frame body, wherein the transmission mechanism is connected to the internal combustion engine, the transmission mechanism is connected to the transmission mechanism and the wheels, so as to transmit power output from the transmission mechanism to the wheels via the transmission mechanism to drive the work (e.g., forward, reverse) of the agricultural machine, the clutch and the shift lever are respectively connected to the transmission mechanism, and the clutch and the shift lever are respectively located in the vicinity of the seat. The driver drives the agricultural machine by riding the seat. When the agricultural machine needs to be shifted (torque-converted), first, the driver operates (e.g., pedals) the clutch to cut off the power transmission of the transmission; secondly, the driver operates (e.g., manually operates) the shift lever to change the gear engagement position in the transmission case; the driver then operates (e.g. releases) the clutch to resume power transmission of the gearbox; thereby allowing the agricultural machine to shift gears due to the change in the gear engagement position of the gearbox. That is, to shift gears of the agricultural machine, the gear engagement position of the transmission must be changed. The existing mode of changing the gear engagement position of the gearbox of the agricultural machine needs manual operation of a driver, so that unmanned driving and operation of the agricultural machine cannot be realized.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an agricultural machine and automatic gear shifting device thereof, wherein automatic gear shifting device can change automatically the gear engagement position of a gearbox of agricultural machine to realize agricultural machine's automatic gear shifting.

An object of the utility model is to provide an agricultural machine and automatic gear shifting device thereof, wherein automatic gear shifting device provides a driver, in order to supply the drive a gear level of gearbox with the mode of the inner space motion of gearbox changes the gear engagement position of gearbox, thereby realizes agricultural machine's automatic gear shifting.

An object of the utility model is to provide an agricultural machine and automatic gear shifting device thereof, wherein automatic gear shifting device provides a swing arm, the gear level be installed in the adjustment end of swing arm, the driven end of gear level be installed in the driver, so the driver drive the gear level during the drive end, the middle part of swing arm can rotate around a fixed axle and drive the gear level is in the inner space motion of gearbox.

An object of the utility model is to provide an agricultural machine and automatic gear shifting device thereof, wherein the driver drives with concertina movement's mode the swing arm round the fixed axle rotates, in order to avoid the power that the driver produced to the bad phenomenon of transmission inefficacy appears during the swing arm transmission, thereby guarantees automatic gear shifting device's reliability.

An object of the utility model is to provide an agricultural machine and automatic gear shifting device thereof, wherein the driver is rotationally installed in agricultural machine's a frame device the driver drives through concertina movement's mode during the swing arm, the driver can do for frame device's rotation, thereby guarantee the driver drives reliably the swing arm driven end. Optionally, the actuator is rotatably mounted to a transmission housing of the transmission, and when the actuator drives the swing arm through a telescopic motion, the actuator can rotate relative to the transmission housing, thereby ensuring that the actuator reliably drives the driven end of the swing arm.

An object of the utility model is to provide an agricultural machine and automatic gear shifting device thereof, wherein through control the driver for rack device's turned angle's mode can be controlled agricultural machine's gear, in order to be favorable to realizing agricultural machine's unmanned driving and operation.

According to an aspect of the utility model, the utility model provides an agricultural machine's automatic gear shifting device for the adjustment the gear engagement position of a gearbox of agricultural machine, wherein the gearbox includes a driven gear set, driven gear set have a transmission shaft, a gear level and by suit in the transmission shaft with be installed drivably in a gear shifting gear of the end of shifting of gear level, wherein automatic gear shifting device includes:

a driver; and

a swing arm, wherein said swing arm has an adjustment end and a driven end corresponding to said adjustment end, said driven end of said swing arm being drivably mounted to said driver, a free end of said shift lever being drivably mounted to said adjustment end of said swing arm, wherein said swing arm is configured to allow a middle portion of said swing arm to rotate about a fixed axis when said driver drives said driven end of said swing arm.

According to the utility model discloses an embodiment, the middle part of swing arm is passed through the fixed axle is rotationally installed in the gearbox casing of gearbox.

According to the utility model discloses an embodiment, the middle part of swing arm is passed through the fixed axle is rotationally installed in agricultural machine's frame body.

According to an embodiment of the invention, the actuator is an electric push rod, and the actuator is rotatably mounted to a gearbox housing of the gearbox.

According to an embodiment of the present invention, the driver is an electric push rod, and the driver is rotatably mounted to the frame body of the agricultural machine.

According to an embodiment of the invention, the drive is a drive motor.

According to another aspect of the utility model, the utility model discloses further provide an agricultural machine, it includes:

a walking device;

a rack device;

a power unit comprising a power mechanism and a gearbox driveably connected to the power mechanism, wherein the gearbox has a gear shift lever; and

an automatic shifting apparatus comprising an actuator and a swing arm, wherein the swing arm has an adjustment end and a driven end corresponding to the adjustment end, the driven end of the swing arm is drivably mounted to the actuator, a free end of the shift lever is drivably mounted to the adjustment end of the swing arm, wherein the swing arm is configured to allow a middle portion of the swing arm to rotate about a fixed axis when the actuator drives the driven end of the swing arm.

According to the utility model discloses an embodiment, the gearbox has a transmission housing, the middle part of swing arm is passed through the fixed axle is rotationally installed in the transmission housing.

According to the utility model discloses an embodiment, the rack device has a frame body, the middle part of swing arm is passed through the fixed axle is rotationally installed in the frame body.

According to an embodiment of the invention, the gearbox has a gearbox housing, the drive is a drive rod, and the drive is rotatably mounted to the gearbox housing.

According to an embodiment of the present invention, the rack device has a rack body, the driver is a driving lever, and the driver is rotatably mounted to the rack body.

According to another aspect of the present invention, the present invention further provides an automatic gear shifting method for an agricultural machine, for adjusting a gear engagement position of a transmission, wherein the automatic gear shifting method comprises the steps of:

(a) when a driven end of a swing arm is driven to move towards a gearbox so that the middle part of the swing arm rotates around a fixed shaft, an adjusting end of the swing arm is allowed to pull a gear shifting lever of the gearbox towards the outer side of the gearbox; and

(b) allowing the adjustment end of the swing arm to push the shift lever of the transmission toward the interior of the transmission when the driven end of the swing arm is driven to move in a direction away from the transmission to cause the middle of the swing arm to rotate about the fixed shaft.

According to an embodiment of the present invention, in the above method, the driven end of the swing arm is driven by a driver.

According to an embodiment of the invention, in the above method, the driver drives the driven end of the swing arm in a telescopic manner.

According to an embodiment of the present invention, in the above method, the driver rotationally drives the driven end of the swing arm.

According to an embodiment of the present invention, in the above method, in a process of the driver switching from an extended state to a retracted state, the driver drives the driven end of the swing arm to move toward the direction of the transmission, and in a process of the driver switching from the retracted state to the extended state, the driver drives the driven end of the swing arm to move away from the direction of the transmission.

Drawings

Fig. 1 shows a perspective view of an agricultural machine according to a preferred embodiment of the present invention.

Fig. 2A and 2B show the disassembled state of the agricultural machine according to the above preferred embodiment of the present invention, respectively.

Fig. 3 shows a partial state of the agricultural machine according to the above preferred embodiment of the present invention, which illustrates a three-dimensional structural relationship of an automatic shifting device and a transmission of the agricultural machine.

Fig. 4 shows a partial state of the agricultural machine according to the above preferred embodiment of the present invention, which illustrates an exploded structural relationship of the automatic shifting device and the transmission of the agricultural machine.

Fig. 5A and 5B respectively show a partial state of the agricultural machine according to the above-described preferred embodiment of the present invention, which describes the positional relationship of the shift levers of the automatic shifting device and the transmission case and the gear engagement position of the transmission case.

Fig. 6A and 6B respectively show a partial state of the agricultural machine according to the above-described preferred embodiment of the present invention, which describes the positional relationship of the shift levers of the automatic shifting device and the transmission case and the gear engagement position of the transmission case.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in a generic and descriptive sense only and not for purposes of limitation, as the terms are used in the description to indicate that the referenced device or element must have the specified orientation, be constructed and operated in the specified orientation, and not for the purposes of limitation.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

Referring to fig. 1 to 6B of the present disclosure, an agricultural machine according to a preferred embodiment of the present invention is disclosed and illustrated in the following description, wherein the agricultural machine includes a frame device 10, a power device 20, a traveling device 30 and an automatic shifting device 60.

Specifically, the rack device 10 includes a rack body 11, a pair of front axles 12, and a pair of rear axles 13, wherein the rack body 11 has a front end 111 and a rear end 112 corresponding to the front end 111, wherein the pair of front axles 12 are symmetrically provided to each side of the rack body 11, and the pair of front axles 12 are held at the front end 111 of the rack body 11, and correspondingly, the pair of rear axles 13 are symmetrically provided to each side of the rack body 11, and the pair of rear axles 13 are held at the rear end 112 of the rack body 11. The power unit 20 is mounted to the housing body 11 to be supported by the housing body 11. The automatic shifting device 60 is connected to the power unit 20 for shifting gears. The running gear 30 includes a pair of front wheels 31 and a pair of rear wheels 32, wherein the pair of front wheels 31 are respectively provided to the pair of front axles 12 such that the pair of front wheels 31 are symmetrically held to each other on both sides of the front end portion 111 of the frame body 11, and correspondingly, the pair of rear wheels 32 are respectively provided to the pair of rear axles 13 such that the pair of rear wheels 32 are symmetrically held to each other on both sides of the rear end portion 112 of the frame body 11. The power output from the power unit 20 can be transmitted to a pair of the front wheels 31 through a pair of the front axles 12 to drive the pair of the front wheels 31 to rotate, and can be transmitted to a pair of the rear wheels 32 through a pair of the rear axles 13 to drive the pair of the rear wheels 32 to rotate. When the pair of front wheels 31 and the pair of rear wheels 32 are driven to drive, the pair of front wheels 31 and the pair of rear wheels 32 can drive the agricultural machine to travel, for example, the pair of front wheels 31 and the pair of rear wheels 32 can drive the agricultural machine to advance, retreat, turn, and the like.

More specifically, the front axle 12 includes a front axle high end 121, a front axle low end 122, and a front axle transmitting portion 123. The front axle high end portion 121 is attached to the front end portion 111 of the chassis body 11. The front axle low end 122 is rotatably held at a lower portion of the front axle low end 122, thus allowing the front axle low end 122 to rotate relative to the front axle high end 121. The front axle transmitting portion 123 includes a front axle high end transmitting portion 1231 and a front axle low end transmitting portion 1232, wherein the front axle high end transmitting portion 1231 extends from the front axle high end portion 121 to the front axle low end portion 122 in such a manner as to be rotatably held inside the front axle high end portion 121 and inside the front axle low end portion 122, such that the front axle high end transmitting portion 1231 enables the front axle low end portion 122 to be reliably held at a lower portion of the front axle high end portion 121, wherein the front axle low end transmitting portion 1232 extends from inside to outside of the front axle low end portion 122, and the front axle low end transmitting portion 1232 and the front axle high end transmitting portion 1231 are engaged with each other inside the front axle low end portion 122, wherein the front wheel 31 is mounted to the front axle low end transmitting portion 1232, such that when the front axle low end portion 122 is driven to rotate relative to the front axle high end portion 121, the front axle lower end 122 drives the front wheel 31 to rotate synchronously and with the same amplitude.

The rear axle 13 includes a rear axle main body 131 and a rear axle transmitting portion 132. The rear axle main body 131 is mounted at the high end thereof to the rear end 112 of the housing body 11. The rear axle transmitting part 132 includes a rear axle high-end transmitting part 1321 and a rear axle low-end transmitting part 1322 engaged with the rear axle high-end transmitting part 1321, wherein the rear axle high-end transmitting part 1321 is rotatably held inside the rear axle main body 131, the rear axle low-end transmitting part 1322 extends from the inside to the outside of the rear axle main body 131, and wherein the rear wheel 32 is mounted to the rear axle low-end transmitting part 1322.

The power unit 20 includes a power mechanism 21, a transmission case 22, a power transmission mechanism 23, and a power distribution mechanism 24, wherein the transmission case 22 is connected to the power mechanism 21, the power transmission mechanism 23 is connected to the transmission case 22 and the power distribution mechanism 24, wherein the front axle transmitting portion 123 of each front axle 12 is connected to the transmission case 22, and the rear axle transmitting portion 132 of each rear axle 13 is connected to the power distribution mechanism 24, respectively, so that when the power mechanism 21 outputs power to the transmission case 22, the transmission case 22 can transmit power to each front wheel 31 through the front axle transmitting portion 123 of each front axle 12 to drive each front wheel 31 to rotate, and the power distribution mechanism 24 can transmit power from the power transmission mechanism 23 to each rear wheel 32 through the rear axle transmitting portion 132 of each rear axle 13 to drive each rear wheel 32 to rotate The rear wheel 32 rotates. The rotation of the pair of front wheels 31 and the rotation of the pair of rear wheels 32 can cause the agricultural machine to travel.

Specifically, the transmission case 22 has a pair of transmission case output shafts 221, wherein the transmission case 22 is provided to the housing body 11, and the transmission case 22 is held between a pair of the front axles 12. Each of the transmission output shafts 221 of the transmission 22 extends toward each of the front axles 12, respectively, and the front axle high end transmission portion 1231 of the front axle transmission portion 123 of the front axle 12 is drivably connected to the transmission output shaft 221 of the transmission 22, so that the power output from the transmission 22 can be transmitted to the front axle transmission portion 123 of the front axle 12 via the transmission output shaft 221. For example, the forward axle high end transmission 1231 of the forward axle 12 is drivably connected to the transmission output shaft 221 of the transmission 22 in such a manner that the forward axle high end transmission 1231 and the transmission output shaft 221 of the transmission 22 mesh with each other.

Preferably, the gearbox output shaft 221 of the gearbox 22 extends to the interior of the front axle high end portion 121 of the front axle 12 to allow the front axle high end transmission portion 1231 of the front axle 12 to be drivably connected to the gearbox output shaft 221 of the gearbox 22 within the interior of the front axle high end portion 121. More preferably, the front axle high end portion 121 of the front axle 12 is mounted to the transmission housing 22 such that the front axle high end transmission portion 1231 of the front axle 12 is drivably connected to the transmission housing output shaft 221 of the transmission housing 22 internally of the front axle high end portion 121.

The power distribution mechanism 24 has a pair of power distribution output shafts 241, wherein the power distribution mechanism 24 is provided to the frame body 11, and the power distribution mechanism 24 is held between a pair of the rear axles 13. Each of the power distribution output shafts 241 of the power distribution mechanism 24 extends toward each of the rear axles 13, respectively, and the rear axle transmitting portion 132 of the rear axle 13 is drivably connected to the power distribution output shaft 241 of the power distribution mechanism 24 so that the power output from the power distribution mechanism 24 can be transmitted to the rear axle transmitting portion 132 of the rear axle 13 via the power distribution output shaft 241. For example, the rear axle transmitting portion 132 of the rear axle 13 is drivably connected to the power distribution output shaft 241 of the power distribution mechanism 24 such that the rear axle transmitting portion 132 and the power distribution output shaft 241 of the power distribution mechanism 24 mesh with each other.

Preferably, the power distribution output shaft 241 of the power distribution mechanism 24 extends to the inside of the rear axle main body 131 of the rear axle 13 to allow the rear axle transmitting portion 132 of the rear axle 13 to be drivably connected to the power distribution output shaft 241 of the power distribution mechanism 24 inside the rear axle main body 131. More preferably, the rear axle main body 131 of the rear axle 13 is mounted to the power distribution mechanism 24 such that the rear axle transmitting portion 132 of the rear axle 13 is drivably connected to the power distribution output shaft 241 of the power distribution mechanism 24 inside the rear axle main body 131.

It should be noted that, in the preferred example of the agricultural machine shown in fig. 1 to 6B, a pair of the front wheels 31 and a pair of the rear wheels 32 of the agricultural machine are both driving wheels, so that the power output from the gearbox 22 can be directly transmitted to each of the front wheels 31 through each of the front axles 12 to drive each of the front wheels 31 to rotate, and the power output from the gearbox 22 is transmitted to each of the rear wheels 32 indirectly through the power distribution mechanism 24 after being transmitted to the power distribution mechanism 24 through the power transmission mechanism 23 to drive each of the rear wheels 32 to rotate, thereby driving the agricultural machine to walk. Alternatively, in another example of the agricultural machine of the present invention, a pair of the front wheels 31 of the agricultural machine are driving wheels, so that the power unit 20 of the agricultural machine may not need to be provided with the power transmission mechanism 23 and the power distribution mechanism 24, that is, each of the front wheels 31 can drive the agricultural machine to travel when the power output from the transmission 22 is transmitted to each of the front wheels 31 through each of the front axles 12 to drive each of the front wheels 31 to rotate.

It is worth mentioning that the type of the power mechanism 21 is not limited in the agricultural machine of the present invention, for example, the power mechanism 21 may be, but not limited to, an internal combustion engine or an electric motor. For example, in the preferred example of the agricultural machine of the present invention shown in fig. 1 to 6B, the power mechanism 21 is an internal combustion engine, so that the power device 20 further includes a fuel tank 25 for containing chemical fuel (such as gasoline, diesel oil, etc.), wherein the power mechanism 21 is connected to the fuel tank 25 to provide power by burning the chemical fuel contained in the fuel tank 25.

Further, referring to fig. 1 and 2A, the agricultural machine includes a mounting bracket 200, the mounting bracket 200 is mounted to the rear end 112 of the frame body 11, wherein a functional component can be mounted to the mounting bracket 200, for example, the functional component can be, but is not limited to, a seedling transplanting mechanism, so that the agricultural machine has a seedling transplanting function after the seedling transplanting mechanism is mounted to the mounting bracket 200. Preferably, referring to fig. 2B, the agricultural machine further includes a functional component output shaft 300, the functional component output shaft 300 is drivably connected to the transmission case 22 and extends from the transmission case 22 toward the rear end 112 of the frame body 11, and when the functional component is mounted on the mounting bracket 200, the functional component output shaft 300 can be mounted on the functional component to transmit the power output from the transmission case 22 to the functional component. In addition, the agricultural machine further includes a housing 400, and the housing 400 is mounted to the frame body 11 to form an integral appearance of the agricultural machine.

Further, referring to fig. 3 to 6B, the transmission case 22 includes a transmission case 222, a driving gear set 223, a driven gear set 224, an elastic member 225, and a shift lever 226.

The transmission housing 222 has an inner space 2221, an input shaft path 2222, two output shaft paths 2223, and a shift lever path 2225, wherein the input shaft path 2222 communicates with the inner space 2221 at one end of the transmission housing 222, the shift lever path 2225 communicates with the inner space 2221 at the other end of the transmission housing 222, and the two output shaft paths 2223 communicate with the inner space 2221 at the opposite ends of the transmission housing 222, respectively. The driving gear set 223 has a driving input shaft 2231 and a driving gear 2232 drivably connected to the driving gear 2232, wherein the driving gear 2232 of the driving gear set 223 is rotatably held in the internal space 2221 of the transmission housing 222, and the driving input shaft 2231 of the driving gear set 223 extends from the internal space 2221 of the transmission housing 222 to the outside of the transmission housing 222 so as to be drivably connected to the power mechanism 21. Driven gear set 224 has a driven gear 2241, a shift gear 2243 drivably connected to driven gear 2241, and a drive shaft 2244 drivably connected to shift gear 2243, wherein driven gear 2241, shift gear 2243, and drive shaft 2244 are rotatably held in interior space 2221 of transmission housing 222, and driven gear 2241 can be fixed to drive gear 2232 of drive gear set 223, so that driven gear 2241 and drive gear 2232 rotate synchronously. Each of the transmission output shafts 221 is drivably connected to the drive shafts 2244 of the driven gear set 224 in the internal space 2221 of the transmission housing 222, respectively, and the transmission output shafts 221 extend from the internal space 2221 of the transmission housing 222 to the outside of the transmission housing 222 through the output shaft passages 2223 of the transmission housing 222. Preferably, the shift gear 2243 is sleeved on the transmission shaft 2244, and the shift gear 2243 can adjust the gear engagement position of the transmission case 22 when moving along the transmission shaft 2244 to realize gear shifting of the agricultural machine.

Preferably, the front axle high end portion 121 of the front axle 12 is mounted to the outside of the transmission housing 222 of the transmission case 22 to allow the transmission output shaft 221 extending to the outside of the transmission housing 222 through the output shaft passage 2223 of the transmission housing 222 to extend to the inside of the front axle high end portion 121 of the front axle 12 to engage with the front axle high end transmitting portion 1231 of the front axle 12.

That is, when the driven gear 2241 of the driven gear set 224 is fixed to the driving gear 2232 of the driving gear set 223, the driving gear 2232 can be driven to rotate by the power inputted from the power mechanism 21 through the driving input shaft 2231 of the driving gear set 223, and the driven gear 2241 can be driven to rotate synchronously by the rotation of the driving gear 2232, so that the power is sequentially outputted from the shift gear 2243, the transmission shaft 2244 and the transmission output shaft 221 of the driven gear set 224 to the front axle transmission unit 123 of the front axle 12.

Further, the driving gear 2232 of the driving gear set 223 has at least one positioning groove 22321, and the driven gear 2241 of the driven gear set 224 has at least one positioning protrusion 22411, wherein when the positioning protrusion 22411 of the driven gear 2241 is positioned in the positioning groove 22321 of the driving gear 2232, the driven gear 2241 is fixed to the driving gear 2232, so that the driven gear 2241 can be rotated in synchronization with the driving gear 2232, and accordingly, when the positioning protrusion 22411 of the driven gear 2241 is disengaged from the positioning groove 22321 of the driving gear 2232, the driven gear 2241 is separated from the driving gear 2232, and at this time, the driven gear 2241 can be kept still even though the driving gear 2232 rotates. Alternatively, the positioning groove 22321 is provided with the driven gear 2241, and the positioning protrusion 22411 is provided on the driving gear 2232, so that the driven gear 2241 is fixed to the driving gear 2232 when the positioning protrusion 22411 of the driving gear 2232 is positioned in the positioning groove 22321 of the driven gear 2241.

One end of the resilient member 225 abuts against the convex portion 2242 of the driven gear set 224 and the other end abuts against the driven gear 2241, and the resilient member 225 is disposed to make the driven gear 2241 have a tendency to move toward the driving gear 2232 so that the positioning protrusion 22411 of the driven gear 2241 is positioned in the positioning groove 22321 of the driving gear 2232. It is worth mentioning that the male part 2242 of the driven gear set 224 may be, but is not limited to, a gear.

It will be appreciated that when the driven gear 2241 is operated to move in a direction away from the driving gear 2232 so that the positioning protrusions 22411 of the driven gear 2241 are disengaged from the positioning grooves 22321 of the driving gear 2232, the driven gear 2241 and the convex portion 2242 cooperate with each other to compress the resilient member 225. When the external force driving the driven gear 2241 to move away from the driving gear 2232 is removed, the elastic element 225 can restore the original state to drive the driven gear 2241 to move toward the driving gear 2232, so as to allow the positioning protrusion 22411 of the driven gear 2241 to be positioned in the positioning groove 22321 of the driving gear 2232, so that the driven gear 2241 is fixed to the driving gear 2232.

The shift lever 226 has a shifting end 2261 and a free end 2262 corresponding to the shifting end 2261, wherein the free end 2262 of the shift lever 226 extends from the interior space 2221 of the transmission housing 222 to the exterior of the transmission housing 222 through the shift lever passage 2225 of the transmission housing 222, wherein the shift gear 2243 of the driven gear set 224 is drivably mounted to the shifting end 2261 of the shift lever 226. In the agricultural machine of the present invention, the driven gear 2241 of the driven gear set 224 and the driving gear 223 the driving gear 2232 is separated to cut off the power of the gearbox 22, then the external operation of the gearbox 22 the free end 2262 of the shift lever 226, the shift lever 226 the shift end 2261 can drive the shift gear 2243 along the transmission shaft 2244 moves to change the gear engaged with the shift gear 2243 the gear of the driven gear set 224, so as to complete the shifting operation of the agricultural machine.

Preferably, the shift gear 2243 has an annular groove 22431, and the shift end 2261 of the shift lever 226 forms a symmetrical shift arm 2263, wherein two shift arms 2263 of the shift arm 2263 extend from the shift end 2261 to and are positioned at a distance from each other in the annular groove 22431 of the shift gear 2243, so that the shift arms 2263 of the shift lever 226 can be always held in the annular groove 22431 of the shift gear 2243 during the rotational movement of the shift gear 2243.

Further, referring to fig. 1 to 6B, the automatic shifting apparatus 60 includes a swing arm 61 and an actuator 62. The swing arm 61 is pivotally mounted at its mid-portion to the transmission housing 222 of the transmission case 22 by a fixed axle 100, wherein the swing arm 61 has an adjustment end 611 and a driven end 612 corresponding to the adjustment end 611, the driven end 612 of the swing arm 61 is drivably mounted to the driver 62, and the free end 2262 of the shift lever 226 is drivably mounted to the adjustment end 611 of the swing arm 61. In the agricultural machine of the present invention, the driven gear 2241 of the driven gear set 224 is driven to the driven gear 2232 of the driving gear set 223 after being separated to cut off the power of the transmission case 22, the driver 62 is arranged at the driven end 612 of the swing arm 61 to drive the swing arm 61 to rotate around the fixed shaft 100 to pull or push the gear lever 226 outwards through the adjusting end 611 of the swing arm 61, the movement of the gear lever 226 drives the gear shift 2243 to move synchronously along the transmission shaft 2244, so as to adjust the other gears of the driven gear set 224 engaged with the gear shift 2243 to complete the gear shift operation of the agricultural machine. After the shift gears 2243 are properly adjusted, the elastic member 225 drives the driven gear 2241 to move toward the driving gear 2232 to fix the driven gear 2241 and the driving gear 2232 by positioning the positioning protrusion 22411 of the driven gear 2241 in the positioning groove 22321 of the driving gear 2232, thereby restoring the power of the transmission case 22. For example, the agricultural machine of the present invention can generate a shift signal according to the working state of the agricultural machine during the working process, wherein the driver 62 provides a driving force to drive the driven end 612 of the swing arm 61 based on the shift signal, so as to perform the subsequent shifting action.

It is worth mentioning that the mode that the agricultural machine produced the signal of shifting is in the utility model discloses in unrestricted, for example, in the in-process of agricultural machine operation, detect in real time the self state and the operation environment state of agricultural machine are in order to produce the signal of shifting.

Alternatively, the middle portion of the swing arm 61 may be pivotally mounted to the frame body 11 by the fixed shaft 100, so that the driver 62 can also drive the swing arm 61 to rotate around the fixed shaft 100.

Preferably, the driver 62 drives the swing arm 61 to rotate around the fixed shaft 100 in a telescopic motion manner, and in this way, the agricultural machine can avoid the bad phenomenon that the power generated by the driver 62 fails to drive when the power is transmitted to the swing arm 61, so that the reliability of the automatic gear shifting device 60 and the stability of the agricultural machine are ensured. For example, in the preferred example of the agricultural machine of the present invention, the actuator 62 is an electric push rod having a contracted state and an expanded state, wherein one end of the actuator 62 is rotatably mounted to the frame body 11. When the driver 62 is switched from the extended state to the retracted state, the driver 62 can drive the driven end 612 of the swing arm 61 to move toward the transmission case 22, and because the middle of the swing arm 61 rotates around the fixed shaft 100, the adjustment end 611 of the swing arm 61 moves away from the transmission case 22, and the movement of the adjustment end 611 of the swing arm 61 drives the shift lever 226 to be pulled outwards to pull the shift gear 2243 along the transmission shaft 2244 through the shift lever 226 to adjust the gear of the driven gear set 224 engaged by the shift gear 2243. Accordingly, when the driver 62 is switched from the retracted state to the extended state, the driver 62 can drive the driven end 612 of the swing arm 61 to move away from the transmission case 22, and because the middle portion of the swing arm 61 rotates around the fixed shaft 100, the adjustment end 611 of the swing arm 61 moves toward the direction approaching the transmission case 22, and the movement of the adjustment end 611 of the swing arm 61 drives the shift lever 226 to be pushed inward to drive the shift gear 2243 to move along the transmission shaft 2244 via the shift lever 226 to adjust the gear of the driven gear set 224 engaged by the shift gear 2243. Alternatively, the driver 62 may be a driving motor, which rotationally drives the driven end 612 of the swing arm 61 to move toward the transmission case 22 or away from the transmission case 22.

More preferably, the driver 62 is rotatably mounted to the housing body 11 so that the mounting angle of the driver 62 with respect to the housing body 11 can be automatically adjusted during the transition of the driver 62 between the retracted state and the extended state, and thus, the gears of the driven gear set 224 engaged by the shift gear 2243 can be conveniently controlled by controlling the angle of the driver 62 with respect to the housing body 11 to control the gear position of the agricultural machine. For example, in a preferred example of the agricultural machine of the present invention, the driver 62 may be provided with an angle sensor to detect the angle of the driver 62, so that the agricultural machine can judge the gear of the agricultural machine according to the angle of the driver 62, or the agricultural machine can be adjusted to be in a suitable gear by rotating the driver 62 to a suitable angle.

Alternatively, in other examples of the agricultural machine of the present invention, the driver 62 is rotatably mounted to the transmission case 22, so that the mounting angle of the driver 62 with respect to the transmission case 22 can be automatically adjusted during the transition of the driver 62 between the retracted state and the extended state, and thus the gears of the driven gear set 224 engaged by the shift gear 2243 can be conveniently controlled by controlling the angle of the driver 62 with respect to the transmission case 22.

Alternatively, in other examples of the agricultural machine of the present invention, the free end 2262 of the shift lever 226 is directly drivably mounted to the driver 62, so that the driver 62 can directly drive the shift lever 226 to be pulled outward or pushed inward.

According to another aspect of the present invention, the present invention further provides an automatic gear shifting method for an agricultural machine, for adjusting a gear engagement position of the transmission case 22, wherein the automatic gear shifting method comprises the steps of:

(a) allowing the adjustment end 611 of the swing arm 61 to pull the shift lever 226 of the transmission case 22 to the outside of the transmission case 22 while driving the driven end 612 of the swing arm 61 to move in the direction toward the transmission case 22 to rotate the middle portion of the swing arm 61 about the fixed shaft 100; and

(b) when the driven end 612 of the swing arm 61 is driven to move in a direction away from the transmission case 22 to rotate the middle portion of the swing arm 61 around the fixed shaft 100, the adjustment end 611 of the swing arm 61 is allowed to push the shift lever 226 of the transmission case 22 toward the inside of the transmission case 22.

Preferably, in the above method, the driven end 612 of the swing arm 61 is driven by the driver 62. For example, in one preferred example of the automatic shifting method, the actuator 62 may drive the driven end 612 of the swing arm 61 in a telescopic manner, while in another preferred example of the automatic shifting method, the actuator 62 may drive the driven end 612 of the swing arm 61 in a rotational manner.

Preferably, in the above method, during the transition of the actuator 62 from the extended state to the retracted state, the actuator 62 drives the driven end 612 of the swing arm 61 to move toward the transmission case 22, and during the transition of the actuator 62 from the retracted state to the extended state, the actuator 62 drives the driven end 612 of the swing arm 61 to move away from the transmission case 22.

It will be appreciated by persons skilled in the art that the above embodiments are only examples, wherein features of different embodiments may be combined with each other to obtain embodiments which are easily imaginable in accordance with the disclosure of the invention, but which are not explicitly indicated in the drawings.

It will be understood by those skilled in the art that the embodiments of the present invention as described above and shown in the drawings are given by way of example only and are not limiting of the present invention. The objects of the present invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the embodiments without departing from the principles, embodiments of the present invention may have any deformation or modification.

Claims

1. An automatic shifting apparatus for an agricultural machine for adjusting a gear engagement position of a transmission of the agricultural machine, wherein the transmission includes a driven gear set having a drive shaft, a shift lever, and a shift gear fitted around the drive shaft and drivably mounted to a shifting end of the shift lever, comprising:

a driver; and

2. The automatic shifting apparatus of claim 1, wherein a middle portion of the swing arm is rotatably mounted to a transmission housing of the transmission through the fixed shaft.

3. The automatic shifting apparatus according to claim 1, wherein a middle portion of the swing arm is rotatably mounted to a frame body of the agricultural machine through the fixed shaft.

4. An automatic gear shifting apparatus according to any one of claims 1 to 3 wherein the actuator is an electric push rod and the actuator is rotatably mounted to a transmission housing of the transmission.

5. The automatic gear shifting device according to any one of claims 1 to 3, wherein the driver is an electric push rod, and the driver is rotatably mounted to a frame body of the agricultural machine.

6. An automatic gear shifting apparatus according to any one of claims 1 to 3, wherein the driver is a drive motor.

7. An agricultural machine, comprising:

a walking device;

a rack device;

8. An agricultural machine according to claim 7, wherein the gearbox has a gearbox housing to which a mid portion of the swing arm is rotatably mounted via the fixed shaft.

9. An agricultural machine according to claim 7, wherein the frame device has a frame body to which a middle portion of the swing arm is rotatably mounted via the fixed shaft.

10. An agricultural machine according to claim 7, wherein the gearbox has a gearbox housing, the drive is a drive rod, and the drive is rotatably mounted to the gearbox housing.

11. An agricultural machine according to claim 7, wherein the frame device has a frame body, the actuator is an actuator rod, and the actuator is rotatably mounted to the frame body.

12. An agricultural machine according to claim 8, wherein the frame device has a frame body, the actuator is an actuator rod, and the actuator is rotatably mounted to the frame body.