A crawler fertilizer spreader

Abstract

The present invention discloses a crawler-type fertilizer spreader, comprising a traveling chassis, a fertilizer dispensing device, a transmission gearbox, and a power unit. The traveling chassis is mounted below a frame, the fertilizer dispensing device is mounted on a machine frame in front of the frame, the transmission gearbox is mounted above the frame, and the power unit is mounted on the transmission gearbox. The transmission gearbox comprises a front housing and a rear housing, wherein a front transmission mechanism and a rear transmission mechanism are respectively disposed in the front housing and the rear housing. The front transmission mechanism is connected to the power unit, and the rear transmission mechanism is connected to the traveling chassis. The present invention can flexibly control the amount of fertilizer dispensed, is easy to operate and maintain, improves the fertilization effect, and provides stable travel, making it more suitable for use in mountainous environments.

Description

Technical Field

[0001] The present 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 plantations, orchards, and is closely linked to economic profitability. Different types of equipment are required due to varying terrain, seasons, and farming requirements. Existing tillage and fertilization equipment and fertilization devices are difficult to adjust fertilizer dosage, lack flexibility, and operate unsteadily on uneven terrain, such as mountainous terrain, impacting operational effectiveness. 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 easy 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 includes a walking chassis, a fertilizer dispensing device, a transmission gear box and a power unit. The walking chassis is installed below the frame, the fertilizer dispensing 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 is powered by the power unit. The rear transmission mechanism is connected to the walking chassis and is powered by the driving mechanism.

[0006] Preferably, the fertilizer discharging device includes a fertilizer storage bucket, a fertilizer discharging box, a motor assembly and an adjusting plate, the fertilizer storage bucket is installed on the machine frame, and a fertilizer discharging box is installed below the discharge port at the bottom of the fertilizer storage bucket, and a fertilizer discharging pipe is detachably installed at the bottom of the lower fertilizer box through a connecting piece, and an adjusting plate that can move forward and backward is installed between the discharge port and the lower fertilizer box, and the adjusting plate 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 discharging assembly are installed on the fertilizer box, and the motor assembly includes a driving motor, a reducer and a motor output shaft installed outside the lower fertilizer box, and the motor assembly is detachably mounted on the lower fertilizer box through a reducer fixing seat, and the fertilizer discharging assembly includes a rotating shaft and a fertilizer discharging wheel installed in the lower fertilizer box, the rotating shaft is connected to the motor output shaft, and the fertilizer discharging wheel is mounted on the rotating shaft and driven by the motor output shaft to rotate, and after the fertilizer discharging wheel rotates, the fertilizer at the discharge port is pushed into the fertilizer discharging pipe.

[0007] Furthermore, 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 on which a knob is set. 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 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 provided 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 provided 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. The sleeve is installed 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. 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, and the adjustment mechanism includes an adjusting disk and a card seat, one end of the adjusting disk is fixedly connected to the handle, and a plurality of card slots are provided on the arc end surface of the other end of the adjusting disk. The card seat structure is U-shaped and the U-shaped opening is horizontally fixed to the frame, and a card rod assembly is provided on the card seat for use with the card slot of the adjusting disk. The card rod assembly includes a card rod installed in the accommodating cavity of the card seat body, the upper part of the card rod extends from the accommodating cavity, and baffles are provided at both horizontal ends of the bottom of the card rod to prevent the card rod from detaching. A spring is provided between the bottom surface of the card rod and the bottom surface of the accommodating cavity. Under normal conditions, the spring keeps the upper part of the card rod extending out of the accommodating cavity.

[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 installed power input shaft and a power input gear, the front transmission assembly includes an integrally installed front drive shaft and a front drive 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 drive shaft of the third rear transmission assembly extends outward and is connected to the walking chassis through a driving mechanism.

[0012] Furthermore, the drive mechanism includes an upper drive gear, a lower drive gear and a lower gear output shaft, the upper drive gear is installed on the rear drive shaft of the third rear drive assembly, the upper drive gear and the lower drive gear are engaged with each other, the lower drive gear is installed on the lower gear output shaft, and the lower gear output shaft is connected to the drive 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 each side of the first rear transmission gear, a speed change adjustment device is arranged on the rear box body above the speed change gear assembly, both ends of the first rear transmission shaft are mounted on the rear box body through the first rear mounting bearing, 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 from left and right movement by a sleeve or a step provided on the first rear transmission shaft. The intermediate connecting portion is key-connected with the first rear transmission shaft and can be inserted into the outer speed gear or the inner speed gear along the sliding of the first rear transmission shaft. When the intermediate connecting portion is inserted into 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 portion is inserted into 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, which is divided into two left and right sections and is connected in the middle of the left and right sections by a second rear connecting member. Both ends of the second rear transmission shaft are mounted on the rear box body through second rear mounting bearings. A second rear transmission gear assembly is provided on each side 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 to the second rear transmission shaft. The second rear transmission internal gear is provided near the second rear connecting member, and the second rear transmission external gear is provided near the second rear mounting bearing. 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 is 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 mounted on the rear box body through third rear mounting bearings. A third rear transmission gear assembly is provided on each side of the third rear connecting piece. The third rear transmission gear assembly includes an integrally mounted third rear transmission internal gear and a third rear transmission external gear. The third rear transmission internal gear and the third rear transmission external gear are both 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. 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 fixed seat is provided in the rear box body, and the second rear connecting piece and the third rear connecting piece are both mounted on the fixed seat.

[0016] Furthermore, 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. A speed adjustment rod is 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 for use 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 driving chassis is powered by a transmission gearbox, which has a reasonable design, good transmission performance, and can flexibly adjust the speed and direction;

[0020] 3. It adopts 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 This is a front view of a crawler-type fertilizer spreader according to the present invention;

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

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

[0024] Figure 4 This is a front view of the transmission gearbox of the present invention;

[0025] Figure 5 is a top cross-sectional view of the transmission gearbox 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 drive mechanism of the present invention;

[0029] Figure 9 This is a structural diagram of the speed adjustment device above the first rear transmission assembly of the present invention;

[0030] Figure 10 This is a structural diagram of the connection between the handle and the adjustment mechanism of the present invention;

[0031] Figure 11 This 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 drive shaft, 130-first rear mounting bearing, 131-first rear drive gear, 14-second rear drive shaft, 140-second rear mounting bearing, 141-second rear connecting member, 15-third rear drive shaft, 150-third rear mounting bearing, 151-third rear connecting member, 16-speed gear assembly, 161-inner speed gear, 162-intermediate connecting portion, 163-outer speed gear, 17-second rear drive gear assembly, 171-second rear drive internal gear, 172-second rear drive external gear, 18-third rear drive gear assembly, 181-third rear drive internal gear, 182-third rear drive external gear, 19-driving mechanism, 190-upper drive gear, 191-lower drive gear, 192-lower gear output shaft;

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

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

[0036] 6- fertilizer storage bucket, 60- fertilizer box, 61- adjustment plate, 62- annular mounting seat, 63- connector, 64- fertilizer pipe, 7- drive motor, 70- reducer, 71- motor output shaft, 72- reducer fixing seat, 73- fertilizer wheel, 8- adjustment assembly, 81- threaded column, 82- annular end cap, 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 with reference to the accompanying drawings and embodiments:

[0039] like Figure 1-11As shown, a crawler fertilizer spreader provided by the present invention includes a walking chassis 9, a fertilizer dispensing device, a transmission gear box 1 and a power unit 2, wherein the walking chassis 9 is installed below the frame 5, the fertilizer dispensing device is installed on a machine frame 50 in front of the frame 5, and an outer cover 51 is installed on the outside of the machine frame 50. The transmission gear box 1 is installed above the frame 5, and the power unit 2 is installed on the transmission gear box 1. The transmission gear box 1 includes 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 unit 2 and is powered by the power unit 2. The rear transmission mechanism is connected to the walking chassis 9 and is powered by the driving mechanism 19.

[0040] like Figure 2 、 Figure 3 As shown, the fertilizer discharging device includes a fertilizer storage bucket 6, a fertilizer discharging box 60, a motor assembly and an adjustment plate 61. The fertilizer storage bucket 6 is installed on the machine frame 50. The fertilizer discharging box 60 is installed below the discharge port at the bottom of the fertilizer storage bucket 6. The bottom of the fertilizer discharging box 60 is detachably installed with a fertilizer discharging pipe 64 through a connector 63. An adjustment plate 61 that can move forward and backward is installed between the discharge port and the fertilizer discharging box 60. The adjustment 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 discharging assembly are installed on the fertilizer discharging box 60. The motor assembly includes a driving mechanism installed outside the fertilizer discharging box 60. The motor 7, the reducer 70 and the motor output shaft 71, the motor assembly is detachably mounted on the fertilizer box 60 through the reducer fixing seat 72, and the fertilizer discharge assembly includes a rotating shaft and a fertilizer discharge wheel 73 installed in the fertilizer box 60, the rotating shaft is connected to the motor output shaft 71, and the fertilizer discharge wheel 73 is installed on the rotating shaft and driven by the motor output shaft 71 to rotate. After the fertilizer discharge wheel 73 rotates, the fertilizer at the discharge port is pushed into the fertilizer pipe 64. A double-layer brush is installed in the fertilizer box 60 behind the fertilizer discharge wheel 73, and the brush head of the double-layer brush is set downward, which has the effect of cleaning the surface of the fertilizer discharge wheel 73 during the fertilizer discharge process.

[0041] In this embodiment, the fertilizer discharging device further includes an adjustment component 8, which is mounted on the annular mounting seat 62 of the fertilizer discharging 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 discharging component. 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. 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 discharging 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. 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 Figure 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 provided 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 provided on each side of the frame 5, and 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 used to achieve the synchronous left or right deflection of the two walking chassis 9 by a cylinder and a piston rod or a high-power motor driven by a gear rack. For example, a cylinder is set 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 achieving the left or right movement of the walking chassis 9 on the chassis frame 90, thereby achieving the steering function, or mutually cooperating power gears and transmission racks are installed horizontally and laterally on the front and rear sides of the frame, the power gear is driven by a high-power motor to rotate, and 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 move synchronously 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 Figure 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 slots are provided on the arc 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 is provided on the clamping seat 531 for use with the clamping slot of the adjusting disk 530. 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 from the accommodating cavity. Baffles are provided at both horizontal ends of the bottom of the clamping rod to prevent the clamping rod from detaching. A spring is provided 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). The power input assembly 121 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 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, and 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 drive 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 engaged 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 box body 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 provided in the middle of the first rear transmission shaft 13, the first rear transmission gear 131 is key-connected to the first rear transmission shaft 13, a speed change gear assembly 16 is provided on each side of the first rear transmission gear 131, a speed change adjustment device 4 is provided on the rear housing 11 above the speed change gear assembly 16, and both ends of the first rear transmission shaft 13 are mounted on the rear housing 11 through a first rear mounting bearing 130. The speed change gear assembly 16 includes an integrally mounted inner speed change gear 161, an intermediate connecting portion 162 and an outer speed change gear 163. 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 all restricted from left and right movement by a sleeve or step provided on the first rear transmission shaft 13. The intermediate connecting portion 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 portion 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 portion 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 is 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 mounted on the rear box body 11 through second rear mounting bearings 140. A second rear transmission gear assembly 17 is provided on each side 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 to the second rear transmission shaft 14. The second rear transmission internal gear 171 is provided near the second rear connecting member 141, and the second rear transmission external gear 172 is provided 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.

[0051] The third rear transmission assembly includes a third rear transmission shaft 15, which is divided into two left and right sections and is 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 mounted on the rear box body 11 through third rear mounting bearings 150. A third rear transmission gear assembly 18 is provided on each side of the third rear connecting member 151. The third rear transmission gear assembly 18 includes an integrally mounted third rear transmission internal gear 181 and a third rear transmission external gear 182. 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 provided in the rear box body 11, and the second rear connecting member 141 and the third rear connecting member 151 are both mounted on the fixing seat 110.

[0052] like Figure 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 gear assembly 16. A positioning groove 44 is provided on the speed adjustment rod 42. A positioning groove 44 is installed on the gearbox 41 above the positioning groove 44. The positioning groove 44 cooperates with a positioning assembly 45, which includes an integrally mounted positioning bolt, a spring, and a steel ball. A connecting rod transmission mechanism is installed at the outer end of the speed adjustment rod 42. When the speed adjustment rod 42 is driven by the connecting rod transmission mechanism to move left and right on the gearbox 41, the speed adjustment rod 42 drives the fixed shift fork 43 to push the speed change gear assembly 16 on the first rear drive shaft 13 to move synchronously, and the speed adjustment rod 42 is fixed in the positioning groove 44 by the positioning assembly 45. This process includes:

[0053] (1) The intermediate 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 intermediate connecting portion 162 is separated from the outer speed gear 163, and the outer speed gear 163 is only movably mounted on the first rear transmission shaft 13 through a 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 intermediate connecting portion 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 intermediate connecting portion 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 scope of protection of the present invention. Equivalent modifications made based on the above embodiments fall within the scope of protection of the present invention.

Claims

1. A crawler fertilizer spreader, comprising a walking chassis, a fertilizer feeding device, a transmission gear box and a power unit, characterized in that: The walking chassis is installed below the frame, the fertilizer discharging 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. 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; 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 each side 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 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. At the same time, the inner speed gear and the inner bearing, the outer speed gear and the inner bearing are all restricted from left and right movement by a sleeve or a step provided on the first rear transmission shaft. The intermediate connecting portion is key-connected with the first rear transmission shaft and can be inserted into the outer speed gear or the inner speed gear along the sliding of the first rear transmission shaft. When the intermediate connecting portion is inserted into 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 portion is inserted into 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, which is divided into two left and right sections and is connected in the middle of the left and right sections by a second rear connecting member. Both ends of the second rear transmission shaft are mounted on the rear box body through second rear mounting bearings. A second rear transmission gear assembly is provided on each side 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 to the second rear transmission shaft. The second rear transmission internal gear is provided near the second rear connecting member, and the second rear transmission external gear is provided near the second rear mounting bearing. 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 is 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 mounted on the rear box body through third rear mounting bearings. A third rear transmission gear assembly is provided on each side of the third rear connecting piece. The third rear transmission gear assembly includes an integrally mounted third rear transmission internal gear and a third rear transmission external gear. The third rear transmission internal gear and the third rear transmission external gear are both 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. 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 fixed seat is provided in the rear box body, and the second rear connecting piece and the third rear connecting piece are both mounted on the fixed seat.

2. The crawler fertilizer spreader according to claim 1, characterized in that: The fertilizer dispensing device includes a fertilizer storage bucket, a fertilizer dispensing box, a motor assembly and an adjusting plate. The fertilizer storage bucket is installed on the machine frame. The fertilizer dispensing box is installed below the discharge port at the bottom of the fertilizer storage bucket. A fertilizer dispensing pipe is installed at the bottom of the fertilizer dispensing 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. The motor assembly and the fertilizer dispensing assembly are installed on the fertilizer dispensing box. The motor assembly includes 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 includes 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 installed on the rotating shaft and driven by the motor output shaft to rotate.

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 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 provided 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 provided 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 includes a sleeve seat, a sleeve and an adjusting rod. The sleeve seat is detachably fixed to the chassis frame. The sleeve is installed 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 card seat, one end of the adjusting disk is fixedly connected to the handle, and a plurality of card slots are provided on the arc end surface of the other end of the adjusting disk. The card seat structure is U-shaped and the U-shaped opening is horizontally fixed to the frame. A card rod assembly is provided on the card seat for use with the card slot of the adjusting disk. The card rod assembly includes a card rod installed in the accommodating cavity of the card seat body, the upper part of the card rod extends from the accommodating cavity, and baffles are provided at both horizontal ends of the bottom of the card rod to prevent the card rod from detaching, and a spring is provided between the bottom surface of the card rod and the bottom surface of the accommodating cavity.

7. The crawler fertilizer spreader according to claim 1, 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 transmission shaft of the third rear transmission assembly. The upper driving gear and the lower driving gear are engaged with each other. The lower driving gear is installed on the lower gear output shaft. The lower gear output shaft is connected to the driving wheel of the walking chassis.

8. The crawler fertilizer spreader according to claim 1, characterized in that: 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. A speed adjustment rod is 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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