Two-stage transmission gear box for agricultural machine

Abstract

The two-stage transmission gear box comprises a first-stage gear box body, a transmission chain wheel assembly and a second-stage gear box body, the first-stage gear box body and the second-stage gear box body are installed on an agricultural machine body, and a box body of the first-stage gear box body and a box body of the second-stage gear box body are connected with the transmission chain wheel assembly through a connecting device. A power device is installed on a box body of the first-stage gearbox, the first-stage gearbox comprises a front box body and a rear box body, a front transmission mechanism and a rear transmission mechanism are arranged in the front box body and the rear box body respectively, the front transmission mechanism is connected with the power device, the rear transmission mechanism is connected with the walking device, a transmission mechanism is arranged in a box body of the second-stage gearbox, and the transmission mechanism is connected with the power device. A transmission mechanism of the secondary gearbox comprises an input assembly and an output assembly, and the output assembly is provided with a tillage module through a driving mechanism. The device has the advantages of being convenient to install and use, flexible to adjust, comprehensive in function, compact in structure, low in cost and good in reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural machinery, and in particular to a two-stage transmission gearbox for agricultural machinery. Background Art

[0002] In tea gardens, orchards and other production, agricultural machinery is widely used and closely related to economic benefits. Due to different terrains, seasons and farming requirements, different types of equipment are needed. Existing farming machinery and equipment have relatively single functions and low requirements for power equipment. In order to meet the comprehensive functions and integrated operations of farming machinery and equipment, it is necessary to develop a more flexible, safe and reliable two-stage transmission gearbox for agricultural machinery. Summary of the invention

[0003] In order to solve the deficiencies of the prior art, the present invention provides a two-stage transmission gearbox for agricultural machinery which is easy to use and has a wide range of applications.

[0004] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0005] A two-stage transmission gearbox for agricultural machinery comprises a primary gearbox, a transmission sprocket assembly and a secondary gearbox, wherein the primary gearbox and the secondary gearbox are mounted on a main body of the agricultural machinery, the housing of the primary gearbox and the housing of the secondary gearbox are connected to the transmission sprocket assembly through a connecting device, and a power device is mounted on the housing of the primary gearbox; the primary gearbox comprises a front housing and a rear housing, a front transmission mechanism and a rear transmission mechanism are respectively arranged in the front housing and the rear housing, the front transmission mechanism is connected to the power device, powered by the power device, and is connected to the transmission mechanism of the secondary gearbox through the transmission sprocket assembly to provide power for the secondary gearbox, and the rear transmission mechanism is connected to a traveling device through a driving mechanism to provide power for the traveling device; a transmission mechanism is arranged in the housing of the secondary gearbox, the transmission mechanism of the secondary gearbox comprises an input assembly and an output assembly, a tillage module is mounted on the output assembly through a driving mechanism, and the input assembly of the secondary gearbox drives the output assembly of the secondary gearbox under the power output of the primary gearbox to provide power for the tillage module mounted on the output assembly.

[0006] Preferably, the tillage module is at least one of a rotary tillage module, a furrowing module, a soil turning module, a harvesting module, a crushing module, a watering module and a weeding module.

[0007] Preferably, the connecting device is a telescopic connecting rod, which is connected to the connecting device power mechanism. The connecting device power mechanism is hinged on the housing of the primary gearbox. The connecting device power mechanism adopts a high-power cylinder or oil cylinder, and the rotatable adjustment of the secondary gearbox is achieved through the telescopic connecting rod.

[0008] Preferably, the transmission sprocket assembly includes a first transmission sprocket, a transmission chain and a second transmission sprocket. The first transmission sprocket is installed on the power output shaft of the primary gearbox, and the second transmission sprocket is installed on the power input shaft of the secondary gearbox. The first transmission sprocket drives the second transmission sprocket to rotate through the transmission chain, thereby driving the power input shaft of the secondary gearbox to rotate.

[0009] Preferably, the front transmission mechanism of the primary gearbox includes at least one power input assembly and several front transmission assemblies, the power input assembly includes an integrally mounted power input shaft and a power input gear, the front transmission assembly includes an integrally mounted front transmission shaft and a front transmission gear, the power input assembly and each front transmission assembly realize transmission through gear matching, at least one front transmission assembly is also an output assembly, the front transmission shaft of the front transmission assembly extends out of the box body to constitute the power output shaft of the primary gearbox, the rear transmission mechanism of the primary gearbox is a variable speed transmission mechanism, the rear transmission mechanism includes a first rear transmission assembly, a second rear transmission assembly, and a third rear transmission assembly, wherein the first rear transmission assembly is a speed adjustment assembly, a speed adjustment device is installed on the box body above the first rear transmission assembly, and the rear transmission shaft of the third rear transmission assembly extends outward and is connected to the traveling device of the agricultural machinery through a driving mechanism.

[0010] Preferably, the primary gearbox includes more than two output assemblies, and except for one output assembly used for transmission of the secondary gearbox, the other output assemblies are output assemblies used for providing power to the tillage module.

[0011] Preferably, the first rear transmission assembly includes a first rear transmission shaft, a first rear transmission gear is arranged in the middle of the first rear transmission shaft, the first rear transmission gear is key-connected to the first rear transmission shaft, a speed change gear assembly is arranged on both sides of the first rear transmission gear, a speed change adjustment device is arranged on the rear housing above the speed change gear assembly, both ends of the first rear transmission shaft are mounted on the rear housing through first rear mounting bearings, the speed change gear assembly includes an integrally mounted inner speed change gear, an intermediate connecting portion and an outer speed change gear, the speed change adjustment device drives the shift fork to move horizontally left and right through the speed change adjustment rod, and the bottom of the shift fork is embedded in the recessed portion of the intermediate connecting portion The inner speed gear and the outer speed gear are both rotatably mounted on the first rear transmission shaft through bearings. At the same time, the inner speed gear and the inner bearing, the outer speed gear and the inner bearing are all restricted by a sleeve or a step arranged on the first rear transmission shaft so as not to move left and right. The intermediate connecting part is key-connected with the first rear transmission shaft and can be embedded in the outer speed gear or embedded in the inner speed gear along the sliding of the first rear transmission shaft. When the intermediate connecting part is embedded in the outer speed gear, the outer speed gear is driven to rotate under the drive of the first rear transmission shaft. When the intermediate connecting part is embedded in the inner speed gear, the inner speed gear is driven to rotate under the drive of the first rear transmission shaft.

[0012] The second rear transmission assembly includes a second rear transmission shaft, the second rear transmission shaft is divided into two left and right sections, and the middle of the left and right sections is connected by a second rear connecting member, both ends of the second rear transmission shaft are installed on the rear box body through second rear mounting bearings, a second rear transmission gear assembly is respectively arranged on both sides of the second rear connecting member, the second rear transmission gear assembly includes a second rear transmission internal gear and a second rear transmission external gear, the second rear transmission internal gear and the second rear transmission external gear are both key-connected with the second rear transmission shaft, the second rear transmission internal gear is arranged near the second rear connecting member, the second rear transmission external gear is arranged near the second rear mounting bearing, and when the second rear transmission shaft rotates, the second rear transmission internal gear and the second rear transmission external gear are driven to move synchronously;

[0013] The third rear transmission assembly includes a third rear transmission shaft, which is divided into two left and right sections and connected in the middle of the left and right sections by a third rear connecting piece, both ends of the third rear transmission shaft are installed on the rear box body by third rear mounting bearings, a third rear transmission gear assembly is arranged on each side of the third rear connecting piece, the third rear transmission gear assembly includes an integrally installed third rear transmission internal gear and a third rear transmission external gear, both the third rear transmission internal gear and the third rear transmission external gear are key-connected to the third rear transmission shaft, the third rear transmission internal gear and the second rear transmission external gear are both arranged near the third rear mounting bearing, and when the third rear transmission shaft rotates, the third rear transmission internal gear and the third rear transmission external gear are driven to move synchronously, a fixing seat is arranged in the rear box body, and the second rear connecting piece and the third rear connecting piece are both installed on the fixing seat.

[0014] Preferably, the second rear connecting member includes an intermediate connecting member and a sleeve bearing assembly located at both ends, the left section and the right section of the second rear drive shaft each have one end movably mounted on the sleeve bearing assembly of the second rear connecting member, the other end of the left section and the right section of the second rear drive shaft are mounted on the rear box body through the sleeve bearing assembly, the third rear connecting member has the same structure as the second rear connecting member, and the mounting structure of the third rear drive shaft is the same as the mounting structure of the second rear drive shaft.

[0015] Preferably, the speed adjustment device includes a gearbox and an intermediate limit block installed on the top plate of the rear box body, there are two gearboxes and they are symmetrically installed on both sides of the intermediate limit block, and a speed adjustment rod is movably installed in the two gearboxes, and a shift fork is fixed to the middle part of the speed adjustment rod by a bolt assembly, and the bottom of the shift fork is embedded in the intermediate connecting part of the speed gear assembly, and a positioning groove is provided on the speed adjustment rod, and a positioning assembly used in conjunction with the positioning groove is installed on the gearbox above the positioning groove, and the positioning assembly includes an integrally installed positioning bolt, a spring and a steel ball, and a connecting rod transmission mechanism is installed at the outer end of the speed adjustment rod, and when the speed adjustment rod is driven to move left and right on the gearbox by the connecting rod transmission mechanism, the speed adjustment rod drives the fixed shift fork to push the speed gear assembly on the first rear transmission shaft to move synchronously, and the speed adjustment rod is fixed in position at the positioning groove by the positioning assembly.

[0016] Preferably, the transmission mechanism of the two-stage gearbox includes at least one input component and at least one output component, the input component includes an integrally mounted power input shaft and a power input gear, the output component includes an integrally mounted power output shaft and a power output gear, or the input component includes an integrally mounted input shaft and a sprocket, the output component includes an integrally mounted output shaft and a sprocket, and the two sprockets of the input component and the output component are connected by a chain; both ends of the power output shaft of the output component extend outward and are provided with an output shaft mounting portion, and a tillage module is mounted on the output shaft mounting portion through a driving mechanism.

[0017] Preferably, the input component of the two-stage gearbox includes an integrally mounted power input shaft and a power input gear, the output component includes an integrally mounted power output shaft and a power output gear, a plurality of transmission components are arranged between the input component and the output component, the transmission component includes an integrally mounted transmission shaft and a transmission gear, each transmission shaft is rotatably mounted on the housing of the two-stage gearbox via bearings, and the input component, each transmission component and the output component realize transmission through gear matching.

[0018] Preferably, a secondary input assembly, a first transmission assembly, a secondary output assembly, a second transmission assembly and a third transmission assembly are arranged in the housing of the secondary gearbox; the secondary input shaft of the secondary input assembly, the first transmission shaft of the first transmission assembly, the secondary output shaft of the secondary output assembly, the second transmission shaft of the second transmission assembly and the third transmission shaft of the third transmission assembly are all rotatably mounted on the housing of the secondary gearbox through bearings; the secondary input gear on the secondary input shaft, the first transmission gear on the first transmission shaft and the secondary output gear on the secondary output shaft are meshed in sequence; both ends of the secondary output shaft extend outward and are provided with secondary output shaft mounting means The secondary input shaft realizes the rotation of the first transmission shaft and the secondary output shaft in sequence through gear transmission under power input, thereby driving the rotation of the secondary output shaft mounting portion; the secondary input gear on the secondary input shaft, the second transmission gear on the second transmission shaft, and the third transmission gear on the third transmission shaft are meshed in sequence, both ends of the third transmission shaft extend outward and are provided with a third transmission shaft mounting portion, the outer end of the third transmission shaft is installed on the agricultural machinery body through a third transmission shaft outer bearing, and the secondary input shaft realizes the rotation of the second transmission shaft and the third transmission shaft through gear transmission under power input, thereby driving the rotation of the third transmission shaft mounting portion.

[0019] Preferably, a secondary input component a and a secondary output component a are arranged in the housing of the secondary gearbox, the secondary input component a comprises a secondary input shaft a, the secondary input shaft a is rotatably mounted on the housing of the secondary gearbox through bearings, both ends of the secondary input shaft a extend outwardly and are provided with a secondary input shaft a mounting portion, the outer end of the secondary input shaft a is mounted on the agricultural machinery body through an external bearing of the secondary input shaft a, the secondary output component a comprises a secondary output shaft a, the secondary output shaft a is rotatably mounted on the housing of the secondary gearbox through bearings, both ends of the secondary output shaft a extend outwardly and are provided with a secondary output shaft a mounting portion, a sprocket transmission component is installed between the secondary input component a and the secondary output component a, the sprocket transmission component comprises a first sprocket, a chain and a second sprocket, the first sprocket is mounted on the secondary input shaft a, the second sprocket is mounted on the secondary output shaft a, the first sprocket drives the second sprocket to rotate through the chain, thereby driving the secondary output shaft a to rotate.

[0020] The beneficial effects of the present invention are:

[0021] 1. The primary and secondary gearboxes are set separately. The front transmission mechanism of the primary gearbox outputs power to the secondary gearbox through the transmission sprocket assembly, the rear transmission mechanism provides power for the walking device, and the secondary gearbox provides power for the functional module of the tillage machinery. The two-stage setting of the gearbox makes the equipment compact and runs smoothly.

[0022] 2. According to the operation needs, the front transmission mechanism of the first-stage gearbox can also provide power through the setting of the output shaft, so as to configure more than two tillage modules and realize the integration of multiple tillage modules;

[0023] 3. By changing the installation position of the secondary gearbox on the agricultural machinery body, the transmission sprocket assembly can be replaced as needed, and the position of the secondary gearbox can be adjusted through the connecting device, which has a compact structure and is easy to adjust;

[0024] 4. By setting the transmission sprocket assembly on other output shafts of the primary gearbox and different input shafts of the secondary gearbox, or changing the number of transmission components and transmission ratios in the primary and secondary gearboxes, the adjustment is flexible and the application is wide;

[0025] 5. The two-stage transmission gearbox for agricultural machinery of the present invention is not only easy to install and use, flexible to adjust, and comprehensive in function, but also has a compact structure, low cost, and good reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is an overall structural diagram of a two-stage transmission gearbox for agricultural machinery of the present invention;

[0027] Figure 2 It is a three-dimensional diagram of the primary gearbox of the present invention;

[0028] Figure 3 This is a front view of the first-stage gearbox of the present invention;

[0029] Figure 4 It is a top cross-sectional view of the first-stage gearbox of the present invention;

[0030] Figure 5 This is a structural diagram of the first rear transmission assembly of the present invention driving the second rear transmission assembly through gears;

[0031] Figure 6 This is a structural diagram of the second rear transmission assembly of the present invention driving the third rear transmission assembly through gears;

[0032] Figure 7 This is a structural diagram of the first rear transmission assembly of the present invention directly driving the third rear transmission assembly through gears;

[0033] Figure 8 It is a structural schematic diagram of the speed change adjustment device above the first rear transmission assembly of the present invention;

[0034] Fig. 9 It is a front view of an embodiment of a two-stage gearbox of the present invention;

[0035] Fig.10 It is a top cross-sectional view of an embodiment of a two-stage gearbox of the present invention;

[0036] Fig.11 A top cross-sectional view of another embodiment of a two-stage gearbox of the present invention;

[0037] In the figure: 1-primary gearbox, 10-front box body, 11-rear box body, 110-fixed seat, 12-front transmission mechanism, 121-power input assembly, 122-first front transmission assembly, 123-second front transmission assembly, 124-first output assembly, 125-third front transmission assembly, 126-fourth front transmission assembly, 127-fifth front transmission assembly;

[0038] 13-first rear transmission shaft, 130-first rear mounting bearing, 131-first rear transmission gear, 14-second rear transmission shaft, 140-second rear mounting bearing, 141-second rear connecting member, 15-third rear transmission shaft, 150-third rear mounting bearing, 151-third rear connecting member, 16-speed gear assembly, 161-inner speed gear, 162-middle connecting portion, 163-outer speed gear, 17-second rear transmission gear assembly, 171-second rear transmission inner gear, 172-second rear transmission outer gear, 18-third rear transmission gear assembly, 181-third rear transmission inner gear, 182-third rear transmission outer gear;

[0039] 2-secondary gearbox, 20-connecting device, 21-transmission sprocket assembly, 22-secondary input assembly, 23-first transmission assembly, 24-secondary output assembly, 241-secondary output shaft mounting portion, 25-second transmission assembly, 26-third transmission assembly, 27-third transmission shaft mounting portion, 28-third transmission shaft outer bearing;

[0040] 210-secondary input assembly a, 211-first sprocket, 212-chain, 213-secondary sprocket, 214-secondary input shaft a mounting portion, 215-secondary input shaft a outer bearing, 216-secondary output assembly a, 217-secondary output shaft a mounting portion;

[0041] 3-speed adjustment device, 30-rear box top plate, 31-gearbox, 32-speed adjustment rod, 33-shift fork, 34-positioning groove, 35-positioning assembly, 36-middle limit block. DETAILED DESCRIPTION

[0042] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0043] Example 1

[0044] like Figure 1-9 As shown, a two-stage transmission gearbox for agricultural machinery provided by the present invention comprises a primary gearbox 1, a transmission sprocket assembly 21 and a secondary gearbox 2, wherein the primary gearbox 1 is fixedly mounted on the agricultural machinery body, the housing of the secondary gearbox 2 is hingedly mounted on the agricultural machinery body, the housing of the primary gearbox 1 and the housing of the secondary gearbox 2 are connected via a connecting device 20, a power device is mounted on the housing of the primary gearbox 1, the power device is connected to the power input shaft of the primary gearbox 1 via a power transmission mechanism, and the power output shaft of the primary gearbox 1 is connected to the power input shaft of the secondary gearbox 2 via a transmission sprocket assembly 21.

[0045] Specifically, the tillage module is at least one of a rotary tillage module, a furrowing module, a soil turning module, a harvesting module, a crushing module, a watering module and a weeding module.

[0046] Specifically, the connecting device 20 is a retractable connecting rod, which is connected to the power mechanism of the connecting device 20. The power mechanism of the connecting device 20 is hingedly arranged on the box body of the primary gearbox 1. The power mechanism of the connecting device 20 adopts a high-power cylinder or oil cylinder, and the rotatable adjustment of the secondary gearbox 2 is realized through the retractable connecting rod.

[0047] Specifically, the transmission sprocket assembly 21 includes a first transmission sprocket, a transmission chain and a second transmission sprocket. The first transmission sprocket is installed on the power output shaft of the primary gearbox 1, and the second transmission sprocket is installed on the power input shaft of the secondary gearbox 2. The first transmission sprocket drives the second transmission sprocket to rotate through the transmission chain, thereby driving the power input shaft of the secondary gearbox 2 to rotate.

[0048] Specifically, the primary gearbox 1 includes an integrally arranged front box body 10 and a rear box body 11, and a front transmission mechanism 12 and a rear transmission mechanism are respectively arranged in the front box body 10 and the rear box body 11, and the front transmission mechanism 12 includes at least one power input assembly 121 and a plurality of front transmission assemblies, and the power input assembly 121 includes an integrally installed power input shaft and a power input gear, and the front transmission assembly includes an integrally installed front transmission shaft and a front transmission gear, and the power input assembly 121 and each front transmission assembly realize transmission through gear matching, and at least one front transmission assembly is also an output assembly, and the front transmission shaft of the front transmission assembly extends out of the box body to form a power output shaft of the primary gearbox 1, and the rear transmission mechanism is a variable speed transmission mechanism, and the rear transmission mechanism includes a first rear transmission assembly, a second rear transmission assembly, and a third rear transmission assembly, wherein the first rear transmission assembly is a speed adjustment assembly, and a speed adjustment device 3 is installed on the box body above the first rear transmission assembly, and the rear transmission shaft of the third rear transmission assembly extends outward and provides power to the walking device of the agricultural machinery through the driving mechanism. In this embodiment, five front transmission assemblies and a first output assembly 124 are included. The five front transmission assemblies are respectively a first front transmission assembly 122, a second front transmission assembly 123, a third front transmission assembly 125, a fourth front transmission assembly 126, and a fifth front transmission assembly 127. The first output assembly 124 has the same basic structure as the front transmission assembly, that is, the first output assembly 124 is also a front transmission assembly.

[0049] Furthermore, the primary gearbox 1 includes more than two output components. Except for one output component used for transmission of the secondary gearbox 2, the other output components are output components used to provide power for the tillage module.

[0050] Specifically, the first rear transmission assembly includes a first rear transmission shaft 13, a first rear transmission gear 131 is arranged in the middle of the first rear transmission shaft 13, the first rear transmission gear 131 is key-connected with the first rear transmission shaft 13, a speed change gear assembly 16 is arranged on both sides of the first rear transmission gear 131, a speed change adjustment device 3 is arranged on the rear housing 11 above the speed change gear assembly 16, both ends of the first rear transmission shaft 13 are installed on the rear housing 11 through the first rear mounting bearing 130, the speed change gear assembly 16 includes an inner speed change gear 161, an intermediate connecting portion 162 and an outer speed change gear 163 installed integrally, the speed change adjustment device 3 drives the shift fork 33 to move horizontally left and right through the speed change adjustment rod 32, and the bottom of the shift fork 33 is embedded in the recess of the intermediate connecting portion 162 In the groove, the inner speed gear 161 and the outer speed gear 163 are rotatably mounted on the first rear transmission shaft 13 through bearings. At the same time, the inner speed gear 161 and the inner bearing, the outer speed gear 163 and the inner bearing are restricted from moving left and right by the sleeve or step set on the first rear transmission shaft 13. The intermediate connecting part 162 is key-connected with the first rear transmission shaft 13 and can be embedded in the outer speed gear 163 or embedded in the inner speed gear 161 along the sliding of the first rear transmission shaft 13. When the intermediate connecting part 162 is embedded in the outer speed gear 163, the outer speed gear 163 is driven to rotate under the drive of the first rear transmission shaft 13. When the intermediate connecting part 162 is embedded in the inner speed gear 161, the inner speed gear 161 is driven to rotate under the drive of the first rear transmission shaft 13.

[0051] The second rear transmission assembly includes a second rear transmission shaft 14, which is divided into two left and right sections and connected in the middle of the left and right sections by a second rear connecting member 141. Both ends of the second rear transmission shaft 14 are installed on the rear box body 11 through second rear mounting bearings 140. A second rear transmission gear assembly 17 is arranged on both sides of the second rear connecting member 141. The second rear transmission gear assembly 17 includes a second rear transmission internal gear 171 and a second rear transmission external gear 172. The second rear transmission internal gear 171 and the second rear transmission external gear 172 are both key-connected with the second rear transmission shaft 14. The second rear transmission internal gear 171 is arranged near the second rear connecting member 141, and the second rear transmission external gear 172 is arranged near the second rear mounting bearing 140. When the second rear transmission shaft 14 rotates, the second rear transmission internal gear 171 and the second rear transmission external gear 172 are driven to move synchronously.

[0052] The third rear transmission assembly includes a third rear transmission shaft 15, which is divided into two left and right sections and connected in the middle of the left and right sections by a third rear connecting member 151. Both ends of the third rear transmission shaft 15 are installed on the rear box body 11 through third rear mounting bearings 150. A third rear transmission gear assembly 18 is arranged on both sides of the third rear connecting member 151. The third rear transmission gear assembly 18 includes a third rear transmission internal gear 181 and a third rear transmission external gear 182 installed integrally. The third rear transmission internal gear 181 and the third rear transmission external gear 182 are both key-connected to the third rear transmission shaft 15. The third rear transmission internal gear 181 and the second rear transmission external gear 172 are both arranged near the third rear mounting bearing 150. When the third rear transmission shaft 15 rotates, the third rear transmission internal gear 181 and the third rear transmission external gear 182 are driven to move synchronously. A fixing seat 110 is arranged in the rear box body 11, and the second rear connecting member 141 and the third rear connecting member 151 are both installed on the fixing seat 110.

[0053] Furthermore, the second rear connecting member 141 includes an intermediate connecting member and a sleeve bearing assembly located at both ends. The left section and the right section of the second rear drive shaft 14 each have one end movably mounted on the sleeve bearing assembly of the second rear connecting member 141, and the other end of the left section and the right section of the second rear drive shaft 14 are mounted on the rear box body 11 through the sleeve bearing assembly. The third rear connecting member 151 has the same structure as the second rear connecting member 141, and the mounting structure of the third rear drive shaft 15 is the same as the mounting structure of the second rear drive shaft 14.

[0054] Specifically, the speed adjustment device 3 includes a gearbox 31 installed on the top plate 30 of the rear box body and an intermediate limit block 36. There are two gearboxes 31 and they are symmetrically installed on both sides of the intermediate limit block 36. A speed adjustment rod 32 is movably installed in the two gearboxes 31. A shift fork 33 is fixed to the middle of the speed adjustment rod 32 by a bolt assembly. The bottom of the shift fork 33 is embedded in the intermediate connecting portion 162 of the speed change gear assembly 16. A positioning groove 34 is provided on the speed adjustment rod 32. The gearbox 31 above the positioning groove 34 is provided with a positioning groove 34. A positioning assembly 35 is installed for use with the positioning groove 34, and the positioning assembly 35 includes an integrally installed positioning bolt, a spring and a steel ball. A connecting rod transmission mechanism is installed at the outer end of the speed adjustment rod 32. When the speed adjustment rod 32 is driven by the connecting rod transmission mechanism to move left and right on the gearbox 31, the speed adjustment rod 32 drives the fixed shift fork 33 to push the speed gear assembly 16 on the first rear drive shaft 13 to move synchronously, and the speed adjustment rod 32 is fixed in position at the positioning groove 34 by the positioning assembly 35.

[0055] Furthermore, the direction from the connecting rod transmission mechanism to the middle limit block 36 divides the positioning groove 34 into positioning groove 1, positioning groove 2, and positioning groove 3. This process includes three states:

[0056] (1) The intermediate connection portion 162 is not in contact with the inner and outer speed gears 163: The first rear transmission shaft 13 is driven to rotate by the first rear transmission gear 131. When the intermediate connection portion 162 of the speed gear assembly 16 is separated from the inner and outer speed gears 163, the inner and outer speed gears 163 are only movably mounted on the first rear transmission shaft 13 through bearings. When the first rear transmission shaft 13 rotates, the inner and outer speed gears 163 are not driven to rotate. At this time, the second and third rear transmission shafts 15 and the traveling device are not driven by power, so as to achieve the effect of adjusting the speed change.

[0057] (2) The middle connection part 162 is embedded in the inner speed gear 161: the first rear transmission shaft 13 drives the inner speed gear 161 to rotate. At this time, the middle connection part 162 is separated from the outer speed gear 163, and the outer speed gear 163 is only movably installed on the first rear transmission shaft 13 through the bearing, so that when the first rear transmission shaft 13 rotates, it does not drive the outer speed gear 163 to rotate. The inner speed gear 161 drives the second rear transmission internal gear 171 to rotate. The second rear transmission internal gear 171 drives the second rear transmission external gear 172 to rotate through the second rear transmission shaft 14. The second rear transmission external gear 172 drives the third rear transmission external gear 182 to rotate. The third rear transmission external gear 182 drives the third rear transmission shaft 15 to rotate and provides power to the walking device through the driving mechanism.

[0058] (3) The middle connection part 162 is embedded in the outer speed gear 163: the first rear transmission shaft 13 drives the outer speed gear 163 to rotate. At this time, the middle connection part 162 is separated from the inner speed gear 161, and the inner speed gear 161 is only movably installed on the first rear transmission shaft 13 through the bearing, so that when the first rear transmission shaft 13 rotates, it does not drive the inner speed gear 161 to rotate. The outer speed gear 163 drives the third rear transmission internal gear 181 to rotate, and the third rear transmission internal gear 181 drives the third rear transmission shaft 15 to rotate and provides power for the walking device through the driving mechanism.

[0059] It can be understood that in the second state, when the first rear transmission shaft 13 rotates counterclockwise to drive the internal speed gear 161 to rotate counterclockwise, the second rear transmission internal gear 171 and the second rear transmission external gear 172 both rotate clockwise, and the third rear transmission external gear 182 rotates counterclockwise, so that the walking device moves forward. In the third state, when the first rear transmission shaft 13 rotates to drive the external speed gear 163 to rotate counterclockwise, the third rear transmission internal gear 181 directly driven rotates clockwise, so that the walking device moves backward. Therefore, the forward and backward movement conversion of the walking device can be quickly realized through the speed adjustment device 3. Of course, in the first state, the first rear transmission shaft 13 can be adjusted to rotate clockwise through the power input assembly 121 and the front transmission mechanism 12, and then in the third state, when the first rear transmission shaft 13 rotates to drive the external speed gear 163 to rotate clockwise, the third rear transmission internal gear 181 directly driven rotates counterclockwise, so that the walking device still moves forward.

[0060] Specifically, a transmission mechanism is arranged in the housing of the secondary gearbox 2, and the transmission mechanism includes at least one input component, several transmission components and at least one output component, wherein the input component includes an integrally mounted power input shaft and a power input gear, the output component includes an integrally mounted power output shaft and a power output gear, the transmission component includes an integrally mounted transmission shaft and a transmission gear, each transmission shaft is rotatably mounted on the housing of the secondary gearbox 2 through bearings, the input component, each transmission component and the output component are transmitted through gear matching, both ends of the power output shaft of the output component extend outward and are provided with an output shaft mounting portion, a tillage module is mounted on the output shaft mounting portion through a driving mechanism, and the input component of the secondary gearbox 2 drives the output component of the secondary gearbox 2 under the power output of the primary gearbox 1, thereby providing power for the tillage module mounted on the output shaft.

[0061] Further, a secondary input assembly 22, a first transmission assembly 23, a secondary output assembly 24, a second transmission assembly 25 and a third transmission assembly 26 are arranged in the housing of the secondary gearbox 2. The secondary input shaft of the secondary input assembly 22, the first transmission shaft of the first transmission assembly 23, the secondary output shaft of the secondary output assembly 24, the second transmission shaft of the second transmission assembly 25 and the third transmission shaft of the third transmission assembly 26 are all rotatably mounted on the housing of the secondary gearbox 2 through bearings. The secondary input gear on the secondary input shaft, the first transmission gear on the first transmission shaft and the secondary output gear of the secondary output shaft are meshed in sequence. Both ends of the secondary output shaft extend outward and are provided with a secondary output shaft mounting portion 241. The secondary input shaft realizes the rotation of the first transmission shaft and the secondary output shaft in sequence through gear transmission under power input, thereby driving the rotation of the secondary output shaft mounting portion 241.

[0062] At the same time, the secondary input gear on the secondary input shaft, the second transmission gear on the second transmission shaft, and the third transmission gear on the third transmission shaft are meshed in sequence. Both ends of the third transmission shaft extend outward and are provided with a third transmission shaft mounting part 27. The outer end of the third transmission shaft is mounted on the agricultural machinery body through a third transmission shaft outer bearing 28. Under power input, the secondary input shaft realizes the rotation of the second transmission shaft and the third transmission shaft through gear transmission, thereby driving the rotation of the third transmission shaft mounting part 27.

[0063] Example 2

[0064] like Fig.10 As shown, a two-stage transmission gearbox for agricultural machinery provided by the present invention has the same main structure as that of embodiment 1, but the transmission structure of the two-stage gearbox 2 is different, specifically: a two-stage input assembly a210 and a two-stage output assembly a216 are arranged in the housing of the two-stage gearbox 2, the two-stage input assembly a210 comprises a two-stage input shaft a, the two-stage input shaft a is rotatably mounted on the housing of the two-stage gearbox 2 through a bearing, the two ends of the two-stage input shaft a extend outwardly and are provided with a two-stage input shaft a mounting portion 214, the outer end of the two-stage input shaft a is mounted on the agricultural machinery body through a two-stage input shaft a outer bearing 215, and the two-stage output assembly a216 is arranged in the housing of the two-stage gearbox 2. 6 includes a secondary output shaft a, which is rotatably mounted on the housing of the secondary gearbox 2 through a bearing, and both ends of the secondary output shaft a extend outward and are provided with a secondary output shaft a mounting portion 217, a sprocket transmission assembly is installed between the secondary input assembly a210 and the secondary output assembly a216, and the sprocket transmission assembly includes a first sprocket 211, a chain 212 and a second sprocket 213, the first sprocket 211 is mounted on the secondary input shaft a, and the second sprocket 213 is mounted on the secondary output shaft a, and the first sprocket 211 drives the second sprocket 213 to rotate through the chain 212, thereby driving the secondary output shaft a to rotate.

[0065] It should be noted that the above embodiments are merely preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. All equivalent modifications made on the basis of the above embodiments belong to the protection scope of the present invention.

Claims

1. A two-stage transmission gearbox for agricultural machinery, comprising a primary gearbox, a transmission sprocket assembly and a secondary gearbox, characterized in that: The primary gearbox and the secondary gearbox are installed on the agricultural machinery body, the case of the primary gearbox and the case of the secondary gearbox are connected to the transmission sprocket assembly through a connecting device, and a power device is installed on the case of the primary gearbox. The primary gearbox includes a front case and a rear case, and a front transmission mechanism and a rear transmission mechanism are respectively arranged in the front case and the rear case. The front transmission mechanism is connected to the power device and is connected to the transmission mechanism of the secondary gearbox through the transmission sprocket assembly, and the rear transmission mechanism is connected to the walking device through a driving mechanism. A transmission mechanism is arranged in the case of the secondary gearbox, and the transmission mechanism of the secondary gearbox includes an input assembly and an output assembly, and the output assembly is equipped with a tillage module through a driving mechanism.

2. The two-stage transmission gearbox for agricultural machinery according to claim 1, characterized in that: The tillage module is at least one of a rotary tillage module, a furrowing module, a soil turning module, a harvesting module, a crushing module, a watering module and a weeding module; the connecting device is a retractable connecting rod, which is connected to a connecting device power mechanism, and the connecting device power mechanism is hingedly arranged on the housing of a primary gearbox, and the connecting device power mechanism adopts a high-power cylinder or an oil cylinder; the transmission sprocket assembly includes a first transmission sprocket, a transmission chain and a second transmission sprocket, the first transmission sprocket is installed on the power output shaft of the primary gearbox, and the second transmission sprocket is installed on the power input shaft of the secondary gearbox, and the first transmission sprocket drives the second transmission sprocket to rotate through the transmission chain, thereby driving the power input shaft of the secondary gearbox to rotate.

3. The two-stage transmission gearbox for agricultural machinery according to claim 1 or 2, characterized in that: The front transmission mechanism of the primary gearbox includes at least one power input assembly and several front transmission assemblies, the power input assembly includes an integrally mounted power input shaft and a power input gear, the front transmission assembly includes an integrally mounted front transmission shaft and a front transmission gear, the power input assembly and each front transmission assembly realize transmission through gear matching, at least one front transmission assembly is also an output assembly, the front transmission shaft of the front transmission assembly extends out of the box body to constitute a power output shaft of the primary gearbox, the rear transmission mechanism of the primary gearbox is a variable speed transmission mechanism, the rear transmission mechanism includes a first rear transmission assembly, a second rear transmission assembly, and a third rear transmission assembly, wherein the first rear transmission assembly is a speed adjustment assembly, a speed adjustment device is installed on the box body above the first rear transmission assembly, and the rear transmission shaft of the third rear transmission assembly extends outward and is connected to the traveling device of the agricultural machinery through a driving mechanism; the primary gearbox includes more than two output assemblies, except that one output assembly is an output assembly for secondary gearbox transmission, and the other output assemblies are output assemblies for providing power to the tillage module.

4. The two-stage transmission gearbox for agricultural machinery according to claim 3, characterized in that: The first rear transmission assembly includes a first rear transmission shaft, a first rear transmission gear is arranged in the middle of the first rear transmission shaft, the first rear transmission gear is key-connected with the first rear transmission shaft, a speed change gear assembly is arranged on both sides of the first rear transmission gear, a speed change adjustment device is arranged on the rear housing above the speed change gear assembly, both ends of the first rear transmission shaft are mounted on the rear housing through first rear mounting bearings, the speed change gear assembly includes an inner speed change gear, an intermediate connecting portion and an outer speed change gear which are integrally mounted, the speed change adjustment device drives the shift fork to move horizontally left and right through the speed change adjustment rod, and the bottom of the shift fork is embedded in the groove of the intermediate connecting portion , the inner speed gear and the outer speed gear are both rotatably mounted on the first rear transmission shaft through bearings, and at the same time, the inner speed gear and the inner bearing, the outer speed gear and the inner bearing are all restricted by a sleeve or a step arranged on the first rear transmission shaft so as not to move left and right, the intermediate connecting part is key-connected with the first rear transmission shaft and can be embedded in the outer speed gear or embedded in the inner speed gear along the sliding of the first rear transmission shaft, when the intermediate connecting part is embedded in the outer speed gear, the outer speed gear is driven to rotate under the drive of the first rear transmission shaft, and when the intermediate connecting part is embedded in the inner speed gear, the inner speed gear is driven to rotate under the drive of the first rear transmission shaft; The second rear transmission assembly includes a second rear transmission shaft, the second rear transmission shaft is divided into two left and right sections, and the middle of the left and right sections is connected by a second rear connecting member, both ends of the second rear transmission shaft are installed on the rear box body through second rear mounting bearings, a second rear transmission gear assembly is respectively arranged on both sides of the second rear connecting member, the second rear transmission gear assembly includes a second rear transmission internal gear and a second rear transmission external gear, the second rear transmission internal gear and the second rear transmission external gear are both key-connected with the second rear transmission shaft, the second rear transmission internal gear is arranged near the second rear connecting member, the second rear transmission external gear is arranged near the second rear mounting bearing, and when the second rear transmission shaft rotates, the second rear transmission internal gear and the second rear transmission external gear are driven to move synchronously; The third rear transmission assembly includes a third rear transmission shaft, which is divided into two left and right sections and connected in the middle of the left and right sections by a third rear connecting piece, both ends of the third rear transmission shaft are installed on the rear box body by third rear mounting bearings, a third rear transmission gear assembly is arranged on each side of the third rear connecting piece, the third rear transmission gear assembly includes an integrally installed third rear transmission internal gear and a third rear transmission external gear, both the third rear transmission internal gear and the third rear transmission external gear are key-connected to the third rear transmission shaft, the third rear transmission internal gear and the second rear transmission external gear are both arranged near the third rear mounting bearing, and when the third rear transmission shaft rotates, the third rear transmission internal gear and the third rear transmission external gear are driven to move synchronously, a fixing seat is arranged in the rear box body, and the second rear connecting piece and the third rear connecting piece are both installed on the fixing seat.

5. The two-stage transmission gearbox for agricultural machinery according to claim 4, characterized in that: The second rear connecting member includes an intermediate connecting member and a sleeve bearing assembly at both ends. The left section and the right section of the second rear transmission shaft each have one end movably mounted on the sleeve bearing assembly of the second rear connecting member, and the other end of the left section and the right section of the second rear transmission shaft are mounted on the rear box body through the sleeve bearing assembly. The third rear connecting member has the same structure as the second rear connecting member, and the mounting structure of the third rear transmission shaft is the same as the mounting structure of the second rear transmission shaft.

6. The two-stage transmission gearbox for agricultural machinery according to claim 4, characterized in that: The speed adjustment device includes a gearbox installed on the top plate of the rear box body and an intermediate limit block. There are two gearboxes and they are symmetrically installed on both sides of the intermediate limit block. Speed ​​adjustment rods are movably installed in the two gearboxes. A shift fork is fixed to the middle part of the speed adjustment rod by a bolt assembly. The bottom of the shift fork is embedded in the intermediate connecting part of the speed gear assembly. A positioning groove is provided on the speed adjustment rod. A positioning assembly used in conjunction with the positioning groove is installed on the gearbox above the positioning groove. The positioning assembly includes an integrally installed positioning bolt, a spring and a steel ball. A connecting rod transmission mechanism is installed at the outer end of the speed adjustment rod. When the speed adjustment rod is driven to move left and right on the gearbox by the connecting rod transmission mechanism, the speed adjustment rod drives the fixed shift fork to push the speed gear assembly on the first rear transmission shaft to move synchronously, and the speed adjustment rod is fixed in position at the positioning groove by the positioning assembly.

7. The two-stage transmission gearbox for agricultural machinery according to claim 1 or 2, characterized in that: The transmission mechanism of the two-stage gearbox includes at least one input component and at least one output component, the input component includes an integrally mounted power input shaft and a power input gear, the output component includes an integrally mounted power output shaft and a power output gear, or the input component includes an integrally mounted input shaft and a sprocket, the output component includes an integrally mounted output shaft and a sprocket, and the two sprockets of the input component and the output component are connected by a chain; both ends of the power output shaft of the output component extend outward and are provided with an output shaft mounting portion, and a tillage module is mounted on the output shaft mounting portion through a driving mechanism.

8. The two-stage transmission gearbox for agricultural machinery according to claim 7, characterized in that: The input component of the two-stage gearbox includes an integrally mounted power input shaft and a power input gear, and the output component includes an integrally mounted power output shaft and a power output gear. A plurality of transmission components are arranged between the input component and the output component. The transmission component includes an integrally mounted transmission shaft and a transmission gear. Each transmission shaft is rotatably mounted on the housing of the two-stage gearbox via a bearing. The input component, each transmission component and the output component realize transmission through gear matching.

9. The two-stage transmission gearbox for agricultural machinery according to claim 7, characterized in that: A secondary input assembly, a first transmission assembly, a secondary output assembly, a second transmission assembly and a third transmission assembly are arranged in the housing of the secondary gearbox. The secondary input shaft of the secondary input assembly, the first transmission shaft of the first transmission assembly, the secondary output shaft of the secondary output assembly, the second transmission shaft of the second transmission assembly and the third transmission shaft of the third transmission assembly are all rotatably mounted on the housing of the secondary gearbox through bearings. The secondary input gear on the secondary input shaft, the first transmission gear on the first transmission shaft and the secondary output gear of the secondary output shaft are meshed in sequence. Both ends of the secondary output shaft extend outward and are provided with a secondary output shaft mounting portion. Under power input, the secondary input shaft realizes the rotation of the first transmission shaft and the secondary output shaft in sequence through gear transmission, thereby driving the rotation of the secondary output shaft mounting portion. The secondary input gear on the secondary input shaft, the second transmission gear on the second transmission shaft and the third transmission gear on the third transmission shaft are meshed in sequence. Both ends of the third transmission shaft extend outward and are provided with a third transmission shaft mounting portion. The outer end of the third transmission shaft is mounted on the agricultural machinery body through the third transmission shaft outer bearing. Under power input, the secondary input shaft realizes the rotation of the second transmission shaft and the third transmission shaft through gear transmission, thereby driving the rotation of the third transmission shaft mounting portion.

10. The two-stage transmission gearbox for agricultural machinery according to claim 7, characterized in that: A secondary input assembly a and a secondary output assembly a are arranged in the housing of the secondary gearbox. The secondary input assembly a comprises a secondary input shaft a, which is rotatably mounted on the housing of the secondary gearbox through bearings. Both ends of the secondary input shaft a extend outward and are provided with secondary input shaft a mounting portion. The outer end of the secondary input shaft a is mounted on the agricultural machinery body through an outer bearing of the secondary input shaft a. The secondary output assembly a comprises a secondary output shaft a, which is rotatably mounted on the housing of the secondary gearbox through bearings. Both ends of the secondary output shaft a extend outward and are provided with secondary output shaft a mounting portion. A sprocket transmission assembly is installed between the secondary input assembly a and the secondary output assembly a, and the sprocket transmission assembly comprises a first sprocket, a chain and a second sprocket. The first sprocket is mounted on the secondary input shaft a, and the second sprocket is mounted on the secondary output shaft a. The first sprocket drives the second sprocket to rotate through the chain, thereby driving the secondary output shaft a to rotate.

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