Crawler-type fertilizer applicator

Abstract

The crawler-type fertilizer applicator comprises a walking chassis, a fertilizer discharging device, a transmission gear box and a power device, the walking chassis is installed below a rack, the fertilizer discharging device is installed on a machine frame in front of the rack, the transmission gear box is installed above the rack, and the power device is installed on the transmission gear box. The transmission gear box 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, and the rear transmission mechanism is connected with the walking chassis. The fertilizer application amount can be flexibly controlled, the operation is convenient, the maintenance is easy, the fertilizer application effect is improved, the walking is stable, and the device is better suitable for being used in mountainous regions and other environments.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural machinery, and in particular to a crawler-type fertilizer spreader. Background Art

[0002] Agricultural machinery is widely used in tea gardens, orchards and other production, and is closely related to economic benefits. Due to different terrains, seasons and farming requirements, different types of equipment are needed. The existing farming and fertilization equipment and fertilization devices are difficult to adjust the fertilizer dosage, lack flexibility, and are not stable enough on uneven terrains such as mountains, which affects the operation effect. Summary of the invention

[0003] In order to solve the deficiencies of the prior art, the present invention provides a crawler-type fertilizer spreader which is convenient to adjust, stable in operation, flexible and reliable.

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

[0005] A crawler fertilizer spreader comprises a walking chassis, a fertilizer placing device, a transmission gear box and a power device, wherein the walking chassis is mounted below a frame, the fertilizer placing device is mounted on a machine frame in front of the frame, the transmission gear box is mounted above the frame, and the power device is mounted on the transmission gear box, the transmission gear box comprises a front box body and a rear box body, a front transmission mechanism and a rear transmission mechanism are respectively arranged in the front box body and the rear box body, the front transmission mechanism is connected to the power device and powered by the power device, and the rear transmission mechanism is connected to the walking chassis and powered by the driving mechanism.

[0006] Preferably, the fertilizer dispensing device comprises a fertilizer storage barrel, a fertilizer dispensing box, a motor assembly and an adjusting plate, the fertilizer storage barrel is mounted on the machine frame, a fertilizer dispensing box is mounted below the discharge port at the bottom of the fertilizer storage barrel, a fertilizer dispensing pipe is detachably mounted at the bottom of the lower fertilizer box through a connecting piece, an adjusting plate movable forward and backward is mounted between the discharge port and the lower fertilizer box, the adjusting plate is in close contact with the bottom surface of the discharge port, and the discharge amount of the discharge port can be adjusted in the left and right directions, a motor assembly and a fertilizer dispensing assembly are mounted on the lower fertilizer box, the motor assembly comprises a driving motor, a reducer and a motor output shaft mounted outside the lower fertilizer box, the motor assembly is detachably mounted on the lower fertilizer box through a reducer fixing seat, the fertilizer dispensing assembly comprises a rotating shaft and a fertilizer dispensing wheel mounted in the lower fertilizer box, the rotating shaft is connected to the motor output shaft, the fertilizer dispensing wheel is mounted on the rotating shaft and driven by the motor output shaft to rotate, and the fertilizer dispensing wheel pushes the fertilizer at the discharge port into the lower fertilizer pipe after rotating.

[0007] Furthermore, the fertilizer feeding device also includes an adjusting component, which is installed on the annular mounting seat of the fertilizer feeding box. The adjusting component includes a threaded column, an annular end cover, a lever and an adjusting cylinder. The threaded column is fixedly connected to the other end of the rotating shaft of the fertilizer discharge component, and the threaded column is threadedly connected to the annular end cover with a knob. The annular end cover is embedded in the adjusting cylinder, and the adjusting cylinder is movably installed in the annular mounting seat. The part of the adjusting cylinder located in the fertilizer feeding box is in close contact with the bottom surface of the discharge port, and the inner diameter of the adjusting cylinder is larger than the outer diameter of the fertilizer discharge wheel so that a part of the right side of the fertilizer discharge wheel is embedded in the adjusting cylinder. The annular end cover is rotated to the left or right side of the threaded column by turning the knob, and the annular end cover drives the adjusting cylinder to rotate horizontally to the left or right in the annular mounting seat, that is, the annular end cover and the adjusting cylinder can synchronously move left and right along the threaded column and the rotating shaft, so that the adjusting cylinder can adjust the discharge amount of the discharge port in the left and right directions.

[0008] Preferably, the walking chassis includes a crawler track, a tensioning wheel and a driving wheel, the crawler track is annularly installed on the outside of the chassis frame, the tensioning wheel and the driving wheel are located inwardly of the crawler track and are arranged on the front and rear sides of the chassis frame, a tensioning mechanism is arranged between the tensioning wheel and the chassis frame, an upper supporting wheel group is installed between the chassis frame and the upper crawler track, and a lower supporting wheel group is installed between the chassis frame and the lower crawler track, one walking chassis is arranged on each side of the frame, and a left and right lateral movement mechanism is installed between the walking chassis and the frame.

[0009] Furthermore, the tensioning mechanism includes a sleeve seat, a sleeve and an adjusting rod. The sleeve seat is detachably fixed to the chassis frame, and a sleeve is installed on the sleeve seat. The sleeve is threadedly connected to the adjusting rod, and the end of the adjusting rod is connected to the tensioning wheel. The track tensioning force is adjusted by rotating the adjusting rod to change the position of the tensioning wheel.

[0010] Preferably, a handle is rotatably installed on the rear side of the frame, and an adjustment mechanism is installed between the handle and the frame, the adjustment mechanism includes an adjusting disk and a socket, one end of the adjusting disk is fixedly connected to the handle, and a plurality of slots are arranged on the arc end surface of the other end of the adjusting disk, the socket structure is U-shaped and the U-shaped opening is horizontally fixed to the frame, and the socket is provided with a clamping rod assembly used in conjunction with the slot of the adjusting disk, the clamping rod assembly includes a clamping rod installed in the accommodating cavity of the socket body, the upper part of the clamping rod extends out of the accommodating cavity, baffles are arranged at both horizontal ends of the bottom of the clamping rod to prevent the clamping rod from detaching, and a spring is arranged between the bottom surface of the clamping rod and the bottom surface of the accommodating cavity, so that the upper part of the clamping rod remains in a state of extending out of the accommodating cavity under normal conditions.

[0011] Preferably, the front transmission mechanism of the transmission gearbox includes a 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, the power input shaft of the power input assembly extends out of the transmission gearbox case and is connected to the power transmission mechanism of the power device, the rear transmission mechanism of the transmission 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 case above the first rear transmission assembly, the third rear transmission assembly is a power output assembly, and the rear transmission shaft of the third rear transmission assembly extends outward and is connected to the walking chassis through a driving mechanism.

[0012] Furthermore, the driving mechanism includes an upper driving gear, a lower driving gear and a lower gear output shaft, the upper driving gear is installed on the rear driving shaft of the third rear transmission assembly, the upper driving gear and the lower driving gear are meshed with each other, the lower driving gear is installed on the lower gear output shaft, and the lower gear output shaft is connected to the driving wheel of the walking chassis.

[0013] 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.

[0014] 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;

[0015] 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.

[0016] Furthermore, 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 drive shaft to move synchronously, and the speed adjustment rod is fixed in position at the positioning groove by the positioning assembly.

[0017] The beneficial effects of the present invention are:

[0018] 1. Install the fertilizer device on the front frame. The amount of fertilizer can be flexibly controlled through the adjustment plate and adjustment components. An adjustable handle is set at the back of the frame, which is easy to operate and maintain, and is conducive to improving the fertilization effect;

[0019] 2. The transmission gearbox provides power to the traveling chassis, with reasonable design and good transmission performance, and can flexibly adjust the speed and direction;

[0020] 3. It adopts a crawler-type walking chassis, which has stable walking, good safety, improved operation quality, adaptable to mountainous environments, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front view of a crawler-type fertilizer spreader of the present invention;

[0022] Figure 2 It is a left side view of the fertilizer placing device of the present invention;

[0023] Figure 3 It is a front view of the fertilizer placing device of the present invention;

[0024] Figure 4 It is a front view of the transmission gear box of the present invention;

[0025] Figure 5 It is a top cross-sectional view of the transmission gear box of the present invention;

[0026] 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;

[0027] 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;

[0028] Figure 8 A structural diagram showing the connection between the third rear transmission assembly and the driving mechanism of the present invention;

[0029] Fig. 9 It is a structural diagram of the speed change adjustment device above the first rear transmission assembly of the present invention;

[0030] Fig.10 A structural diagram showing the connection between the handle and the adjustment mechanism of the present invention;

[0031] Fig.11 It is a structural diagram of the walking chassis of the present invention;

[0032] In the figure: 1-transmission 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-third front transmission assembly, 125-fourth front transmission assembly, 126-fifth front transmission assembly, 127-sixth front transmission assembly;

[0033] 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, 19-driving mechanism, 190-upper driving gear, 191-lower driving gear, 192-lower gear output shaft;

[0034] 2-power device, 3-power transmission mechanism, 4-speed adjustment device, 40-rear box top plate, 41-gearbox, 42-speed adjustment rod, 43-shift fork, 44-positioning groove, 45-positioning assembly, 46-middle limit block;

[0035] 5-frame, 50-frame, 51-cover, 52-handle, 53-adjustment mechanism, 530-adjustment plate, 531-seat;

[0036] 6- fertilizer storage barrel, 60- fertilizer box, 61- adjustment plate, 62- annular mounting seat, 63- connecting piece, 64- fertilizer pipe, 7- driving motor, 70- reducer, 71- motor output shaft, 72- reducer fixing seat, 73- fertilizer wheel, 8- adjustment assembly, 81- threaded column, 82- annular end cover, 83- knob, 84- adjustment cylinder;

[0037] 9-walking chassis, 90-chassis frame, 91-track, 92-driving wheel, 93-tensioning wheel, 94-tensioning mechanism, 940-sleeve seat, 941-sleeve, 942-adjusting rod, 95-lower supporting wheel group, 96-upper supporting wheel group. DETAILED DESCRIPTION

[0038] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0039] like Figure 1-11As shown, a crawler fertilizer spreader provided by the present invention comprises a walking chassis 9, a fertilizer placing device, a transmission gear box 1 and a power device 2, wherein the walking chassis 9 is mounted below a frame 5, the fertilizer placing device is mounted on a machine frame 50 in front of the frame 5, an outer cover 51 is mounted on the outer side of the machine frame 50, the transmission gear box 1 is mounted above the frame 5, the power device 2 is mounted on the transmission gear box 1, the transmission gear box 1 comprises a front box body 10 and a rear box body 11, 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, the front transmission mechanism 12 is connected to the power device 2 and is powered by the power device 2, the rear transmission mechanism is connected to the walking chassis 9, and the driving mechanism 19 is used to provide power to the walking chassis 9.

[0040] like Figure 2 , Figure 3 As shown, the fertilizer dispensing device includes a fertilizer storage barrel 6, a fertilizer dispensing box 60, a motor assembly and an adjusting plate 61. The fertilizer storage barrel 6 is installed on the machine frame 50. The fertilizer dispensing box 60 is installed below the discharge port at the bottom of the fertilizer storage barrel 6. A fertilizer dispensing pipe 64 is detachably installed at the bottom of the fertilizer dispensing box 60 through a connecting piece 63. An adjusting plate 61 that can move forward and backward is installed between the discharge port and the fertilizer dispensing box 60. The adjusting plate 61 is in close contact with the bottom surface of the discharge port and can adjust the discharge amount of the discharge port in the left and right directions. The motor assembly and the fertilizer dispensing assembly are installed on the fertilizer dispensing box 60. The motor assembly includes a driving device installed outside the fertilizer dispensing box 60. The motor 7, the reducer 70 and the motor output shaft 71, the motor assembly is detachably mounted on the lower fertilizer box 60 through the reducer fixing seat 72, the fertilizer discharge assembly includes a rotating shaft and a fertilizer discharge wheel 73 installed in the lower fertilizer box 60, the rotating shaft is connected to the motor output shaft 71, the fertilizer discharge wheel 73 is installed on the rotating shaft and driven by the motor output shaft 71 to rotate, and the fertilizer discharge wheel 73 pushes the fertilizer at the discharge port into the lower fertilizer pipe 64 after rotation, and a double-layer brush is installed in the lower fertilizer box 60 behind the fertilizer discharge wheel 73, and the brush head of the double-layer brush is set downward, so as to clean the surface of the fertilizer discharge wheel 73 during the fertilizer discharge process.

[0041] In this embodiment, the fertilizer dispensing device further includes an adjustment component 8, which is mounted on the annular mounting seat 62 of the fertilizer dispensing box 60. The adjustment component 8 includes a threaded column 81, an annular end cover 82, a lever and an adjustment cylinder 84. The threaded column 81 is fixedly connected to the other end of the rotating shaft of the fertilizer dispensing component, and the threaded column 81 is threadedly connected to the annular end cover 82 provided with a knob 83. The annular end cover 82 is embedded in the adjustment cylinder 84, and the adjustment cylinder 84 is movably mounted in the annular mounting seat 62. The adjustment cylinder 84 is located in the part inside the fertilizer dispensing box 60. The adjusting cylinder 84 is in close contact with the bottom surface of the discharge port, and the inner diameter of the adjusting cylinder 84 is larger than the outer diameter of the fertilizer wheel 73 so that a part of the right side of the fertilizer wheel 73 is embedded in the adjusting cylinder 84. The annular end cover 82 is rotated to the left or right side of the threaded column 81 by the knob 83, and the annular end cover 82 drives the adjusting cylinder 84 to rotate horizontally to the left or right in the annular mounting seat 62, that is, the annular end cover 82 and the adjusting cylinder 84 can synchronously move left and right along the threaded column 81 and the rotating shaft, so that the adjusting cylinder 84 can adjust the discharge amount of the discharge port in the left and right directions.

[0042] like Fig.11 As shown, the walking chassis 9 includes a crawler track 91, a tensioning wheel 93 and a driving wheel 92. The crawler track 91 is annularly installed on the outside of the chassis frame 90. The tensioning wheel 93 and the driving wheel 92 are located inwardly of the crawler track 91 and are arranged on the front and rear sides of the chassis frame 90. A tensioning mechanism 94 is arranged between the tensioning wheel 93 and the chassis frame 90. An upper supporting wheel group 96 is installed between the chassis frame 90 and the upper crawler track 91. A lower supporting wheel group 95 is installed between the chassis frame 90 and the lower crawler track 91. One walking chassis 9 is arranged on each side of the frame 5. A left and right lateral movement mechanism is installed between the walking chassis 9 and the frame 5.

[0043] Specifically, the left and right lateral movement mechanism can be driven by a cylinder and a piston rod or a high-power motor through a gear rack to achieve synchronous left or right deflection of the two walking chassis 9. For example, a cylinder is arranged on the bottom surface of the frame 5, and the piston rod of the cylinder is connected to the steering rod. The steering rod pulls the steering knuckle (fixedly connected to the walking chassis 9), and the steering knuckle drives the walking chassis 9 to rotate, thereby realizing the movement of the walking chassis 9 to the left or right on the chassis frame 90, thereby realizing the steering function, or mutually matching power gears and transmission racks are horizontally and laterally installed on the front and rear sides of the frame, the power gear is driven by a high-power motor to rotate, the transmission rack is horizontally movably arranged on the frame, and the transmission rack is connected to the walking chassis 9 at both ends through a connecting assembly. By controlling the forward or reverse rotation of the motor, the transmission rack is driven to move horizontally left and right, thereby making the front and rear sides of the two walking chassis 9 synchronously move left or right.

[0044] In this embodiment, the tensioning mechanism 94 includes a sleeve seat 940, a sleeve 941 and an adjusting rod 942. The sleeve seat 940 is detachably fixed to the chassis frame 90. The sleeve 941 is installed on the sleeve seat 940. The sleeve 941 is threadedly connected to the adjusting rod 942. The end of the adjusting rod 942 is connected to the tensioning wheel 93. The tensioning force of the track 91 is adjusted by rotating the adjusting rod 942 to change the position of the tensioning wheel 93.

[0045] like Fig.10 As shown, a handle 52 is rotatably installed on the rear side of the frame 5, and an adjustment mechanism 53 is installed between the handle 52 and the frame 5, and the adjustment mechanism 53 includes an adjusting disk 530 and a clamping seat 531. One end of the adjusting disk 530 is fixedly connected to the handle 52, and a plurality of clamping grooves are arranged on the arc-shaped end surface of the other end of the adjusting disk 530. The clamping seat 531 has a U-shaped structure and the U-shaped opening is horizontally fixed to the frame 5. A clamping rod assembly used in conjunction with the clamping groove of the adjusting disk 530 is provided on the clamping seat 531. The clamping rod assembly includes a clamping rod installed in the accommodating cavity of the clamping seat 531 body, and the upper part of the clamping rod extends out of the accommodating cavity. Baffles are arranged at both horizontal ends of the bottom of the clamping rod to prevent the clamping rod from detaching. A spring is arranged between the bottom surface of the clamping rod and the bottom surface of the accommodating cavity. Under normal conditions, the spring keeps the upper part of the clamping rod extending out of the accommodating cavity.

[0046] like Figures 4 to 8 As shown, the front transmission mechanism 12 of the transmission gearbox 1 includes a power input assembly 121 and six front transmission assemblies (a first front transmission assembly 122, a second front transmission assembly 123, a third front transmission assembly 124, a fourth front transmission assembly 125, a fifth front transmission assembly 126, and a sixth front transmission assembly 127127), wherein the power input assembly 121 includes an integrally mounted power input shaft and a power input gear, and the front transmission assembly includes an integrally mounted front transmission shaft and a front transmission gear, and the power input assembly 121 and each front transmission assembly are realized by gear matching. Transmission, the power input shaft of the power input assembly 121 extends out of the box body of the transmission gearbox 1 and is connected to the power transmission mechanism 3 of the power unit 2, the rear transmission mechanism of the transmission gearbox 1 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 8, a speed adjustment device 4 is installed on the box body above the first rear transmission assembly, the third rear transmission assembly is a power output assembly, and the rear transmission shaft of the third rear transmission assembly extends outward and is connected to the walking chassis 9 through a driving mechanism 19.

[0047] The driving mechanism 19 includes an upper driving gear 190, a lower driving gear 191 and a lower gear output shaft 192. The upper driving gear 190 is installed on the rear transmission shaft of the third rear transmission assembly. The upper driving gear 190 and the lower driving gear 191 are meshed with each other. The lower driving gear 191 is installed on the lower gear output shaft 192. The lower gear output shaft 192 is connected to the driving wheel 92 of the walking chassis 9. The rotation of the rear transmission shaft of the third rear transmission assembly can synchronously drive the driving wheel 92 of the walking chassis 9 to rotate.

[0048] It can be understood that the front transmission assembly of the transmission gearbox 1 can be set as a power output assembly, and the power output assembly includes an integrally installed power output shaft and a power output gear. Both ends of the power output shaft of the power output assembly extend out of the transmission gearbox 1 to replace the motor assembly to provide power for the fertilizer application device.

[0049] In this embodiment, 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 4 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 4 drives the shift fork 43 to move horizontally left and right through the speed change adjustment rod 42, and the bottom of the shift fork 43 is embedded in the intermediate connecting portion 162 In the groove, the inner speed gear 161 and the outer speed gear 163 are both 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 by the sleeve or step set on the first rear transmission shaft 13 so as not to move left and right. 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.

[0050] 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, and both ends of the second rear transmission shaft 14 are installed on the rear box body 11 through second rear mounting bearings 140, and a second rear transmission gear assembly 17 is arranged on both sides of the second rear connecting member 141, and the second rear transmission gear assembly 17 includes a second rear transmission internal gear 171 and a second rear transmission external gear 172, and 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, and 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, and 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;

[0051] 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.

[0052] like Fig. 9As shown, the speed adjustment device 4 includes a gearbox 41 installed on the top plate 40 of the rear box body and an intermediate limit block 46. There are two gearboxes 41 and they are symmetrically installed on both sides of the intermediate limit block 46. A speed adjustment rod 42 is movably installed in the two gearboxes 41. A shift fork 43 is fixed to the middle of the speed adjustment rod 42 by a bolt assembly. The bottom of the shift fork 43 is embedded in the intermediate connecting portion 162 of the speed change gear assembly 16. A positioning groove 44 is provided on the speed adjustment rod 42. A gearbox 41 is installed above the positioning groove 44. The positioning groove 44 cooperates with the positioning assembly 45, which includes an integrally installed positioning bolt, a spring and a steel ball. The outer end of the speed adjustment rod 42 is installed with a connecting rod transmission mechanism. When the speed adjustment rod 42 is driven to move left and right on the gearbox 41 by the connecting rod transmission mechanism, the speed adjustment rod 42 drives the fixed shift fork 43 to push the speed gear assembly 16 on the first rear transmission shaft 13 to move synchronously, and the speed adjustment rod 42 is fixed in position at the positioning groove 44 by the positioning assembly 45. This process includes:

[0053] (1) The middle connecting portion 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 connecting portion 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 19.

[0054] (2) 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 mounted 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 to the walking device through the driving mechanism 19.

[0055] Therefore, the forward and backward movement conversion of the traveling device can be realized through the above-mentioned speed change adjustment device 4, and finally the driving mechanism 19 provides power for the traveling chassis 9.

[0056] 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 crawler fertilizer spreader, comprising a walking chassis, a fertilizer placing device, a transmission gear box and a power device, characterized in that: The walking chassis is installed below the frame, the fertilizer placing device is installed on the machine frame in front of the frame, the transmission gear box is installed above the frame, and the power unit is installed on the transmission gear box. The transmission gear box includes a front box body and a rear box body. A front transmission mechanism and a rear transmission mechanism are respectively arranged in the front box body and the rear box body. The front transmission mechanism is connected to the power unit, and the rear transmission mechanism is connected to the walking chassis.

2. The crawler fertilizer spreader according to claim 1, characterized in that: The fertilizer dispensing device comprises a fertilizer storage barrel, a fertilizer dispensing box, a motor assembly and an adjusting plate. The fertilizer storage barrel is installed on a machine frame. A fertilizer dispensing box is installed below a discharge port at the bottom of the fertilizer storage barrel. A fertilizer dispensing pipe is installed at the bottom of the fertilizer box through a connecting piece. An adjusting plate is installed between the discharge port and the fertilizer dispensing box. The adjusting plate is in close contact with the bottom surface of the discharge port. A motor assembly and a fertilizer dispensing assembly are installed on the fertilizer dispensing box. The motor assembly comprises a driving motor, a reducer and a motor output shaft installed outside the fertilizer dispensing box. The motor assembly is detachably mounted on the fertilizer dispensing box through a reducer fixing seat. The fertilizer dispensing assembly comprises a rotating shaft and a fertilizer dispensing wheel installed in the fertilizer dispensing box. The rotating shaft is connected to the motor output shaft. The fertilizer dispensing wheel is mounted on the rotating shaft and driven to rotate by the motor output shaft.

3. The crawler fertilizer spreader according to claim 2, characterized in that: The fertilizer discharging device also includes an adjusting component, which is installed on the annular mounting seat of the fertilizer discharging box. The adjusting component includes a threaded column, an annular end cover, a lever and an adjusting cylinder. The threaded column is fixedly connected to the other end of the rotating shaft of the fertilizer discharging component, and the threaded column is threadedly connected to the annular end cover with a knob. The annular end cover is embedded in the adjusting cylinder, and the adjusting cylinder is movably installed in the annular mounting seat. The part of the adjusting cylinder located in the fertilizer discharging box is in close contact with the bottom surface of the discharge port, and the inner diameter of the adjusting cylinder is larger than the outer diameter of the fertilizer discharging wheel so that a part of the right side of the fertilizer discharging wheel is embedded in the adjusting cylinder. The annular end cover is rotated to the left or right side of the threaded column by turning the knob, and the annular end cover synchronously drives the adjusting cylinder to rotate left or right in the annular mounting seat.

4. The crawler fertilizer spreader according to claim 1, characterized in that: The walking chassis includes a crawler track, a tensioning wheel and a driving wheel. The crawler track is annularly installed on the outside of the chassis frame. The tensioning wheel and the driving wheel are located inwardly of the crawler track and are arranged on the front and rear sides of the chassis frame. A tensioning mechanism is arranged between the tensioning wheel and the chassis frame. An upper supporting wheel group is installed between the chassis frame and the upper crawler track, and a lower supporting wheel group is installed between the chassis frame and the lower crawler track. One walking chassis is arranged on each side of the frame, and a left and right lateral movement mechanism is installed between the walking chassis and the frame.

5. The crawler fertilizer spreader according to claim 4, characterized in that: The tensioning mechanism comprises a sleeve seat, a sleeve and an adjusting rod. The sleeve seat is detachably fixed on the chassis frame. A sleeve is mounted on the sleeve seat. The sleeve is threadedly connected to the adjusting rod. The end of the adjusting rod is connected to the tensioning wheel.

6. The crawler fertilizer spreader according to claim 1, characterized in that: A handle is rotatably installed on the rear side of the frame, and an adjustment mechanism is installed between the handle and the frame. The adjustment mechanism includes an adjusting disk and a socket, one end of the adjusting disk is fixedly connected to the handle, and a plurality of slots are arranged on the arc end surface of the other end of the adjusting disk. The socket structure is U-shaped and the U-shaped opening is horizontally fixed to the frame. The socket is provided with a clamping rod assembly used in conjunction with the clamping slot of the adjusting disk. The clamping rod assembly includes a clamping rod installed in the accommodating cavity of the socket body, the upper part of the clamping rod extends out of the accommodating cavity, baffles are arranged at both horizontal ends of the bottom of the clamping rod to prevent the clamping rod from detaching, and a spring is arranged between the bottom surface of the clamping rod and the bottom surface of the accommodating cavity.

7. The crawler fertilizer spreader according to claim 1, characterized in that: The front transmission mechanism of the transmission gearbox includes a power input assembly and several front transmission assemblies, the power input assembly includes an integrally installed power input shaft and a power input gear, the front transmission assembly includes an integrally installed front transmission shaft and a front transmission gear, the power input assembly and each front transmission assembly realize transmission through gear matching, the power input shaft of the power input assembly extends out of the transmission gearbox case and is connected to the power transmission mechanism of the power device, the rear transmission mechanism of the transmission 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, and a speed adjustment device is installed on the case above the first rear transmission assembly, the third rear transmission assembly is a power output assembly, and the rear transmission shaft of the third rear transmission assembly extends outward and is connected to the walking chassis through a driving mechanism.

8. The crawler fertilizer spreader according to claim 7, characterized in that: The driving mechanism includes an upper driving gear, a lower driving gear and a lower gear output shaft. The upper driving gear is installed on the rear driving shaft of the third rear transmission assembly. The upper driving gear and the lower driving gear are meshed with each other. The lower driving gear is installed on the lower gear output shaft, and the lower gear output shaft is connected to the driving wheel of the walking chassis.

9. The crawler fertilizer spreader according to claim 1, 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.

10. The crawler fertilizer spreader according to claim 9, 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.

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