A riding type rice transplanter gearbox

Abstract

The invention relates to a gearbox for a riding rice transplanter, comprising a planting power output shaft assembly, a travel power output shaft assembly, a half-shaft assembly, a speed-changing first shaft assembly, a speed-changing second shaft assembly, a speed-changing third shaft assembly and a speed-changing fourth shaft assembly, all of which are arranged in a gearbox housing. The speed-changing first shaft assembly comprises a shaft, a first shaft travel gear fixed on the shaft, and a first shaft planting one-way gear arranged on the shaft through a one-way bearing. The speed-changing second shaft assembly comprises two shafts, a second shaft speed-changing large gear, a second shaft speed-changing small gear, a second shaft travel gear and a planting double gear all arranged on the two shafts. The speed-changing three shaft assembly comprises three shafts, a three shaft spur gear and a three shaft bevel gear all fixed on the three shafts. The speed-changing four shaft assembly comprises four shafts, a bevel gear and a second plant spacing gear fixed on the four shafts. The half-shaft assembly comprises half shafts, half shaft gears and a first plant spacing gear all fixed on the half shafts. The gearbox of the invention has a relatively small overall volume and reliable transmission.

Description

Technical Field

[0001] The invention belongs to the field of rice transplanters, and in particular relates to a gearbox of a riding rice transplanter. Background Art

[0002] A rice transplanter is an agricultural machine that plants rice seedlings in rice fields. When planting, a mechanical claw first takes out several rice seedlings from the seedbed and plants them in the soil of the field. In order to keep the angle between the seedbed and the ground at right angles, the front end of the mechanical claw must move in an elliptical curve. The movement is accomplished by a planetary mechanism of rotating or deforming gears, and the forward engine can drive these moving machines at the same time. The rice transplanter must have anti-slip wheels and a floating design to move on the soil. If the seedlings are to be planted in pieces, the rice seedlings are taken out from a specific seedling box and then planted mechanically.

[0003] The existing gearbox of the rice transplanter has many parts, complex structure, large size, and the brake adopts a brake pad structure, which has poor effect after long-term use. In addition, there is no clutch structure between the transmission of the gearbox and the planting mechanism. Once the planting mechanism is stuck, the gearbox is likely to fail. Summary of the invention

[0004] In order to solve the above technical problems, the purpose of the present invention is to provide a riding type rice transplanter gearbox, which has a compact structure and reliable transmission.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A riding rice transplanter gearbox comprises a gearbox housing, and a planting power output shaft assembly, a travel power output shaft assembly, a half shaft assembly, a first speed change shaft assembly, a second speed change shaft assembly, a third speed change shaft assembly and a fourth speed change shaft assembly, all of which are arranged in the gearbox housing.

[0007] The speed-changing one-axis assembly includes an axis, an axis travel gear fixed on the axis, and an axis planting one-way gear arranged on the axis through a one-way bearing.

[0008] The speed-changing two-axis assembly includes two axes, and two-axis speed-changing large gears, two-axis speed-changing small gears, two-axis travel gears and planting double gears all arranged on the two axes. A speed-changing sliding sleeve is also arranged between the two-axis speed-changing large gears and the two-axis speed-changing small gears. The speed-changing sliding sleeve is connected with a shift fork assembly. The speed-changing three-axis assembly includes three axes, three-axis spur gears and three-axis bevel gears all fixed on the three axes. The speed-changing four-axis assembly includes four axes, bevel gears and a second pitch gear fixed on the four axes. The half-axis assembly includes half axes, half-axis gears and a first pitch gear all fixed on the half axes.

[0009] The first shaft and the second shaft are driven by the meshing of the first shaft travel gear and the second shaft speed change gear or the second shaft speed change pinion, and the second shaft and the third shaft are driven by the meshing of the second shaft travel gear and the third shaft spur gear. The third shaft is also provided with a differential assembly for connecting the front axle drive shaft, and the third shaft is driven by the meshing of the third shaft bevel gear and the travel power output shaft assembly.

[0010] The one-shaft planting one-way gear on the one shaft is meshed with the planting double gear on the second shaft, and the planting double gear on the second shaft is also meshed with the half-shaft gear on the half-shaft, thereby driving the half-shaft to rotate. The half-shaft and the four-shaft are transmitted through the meshing transmission of the first plant spacing gear and the second plant spacing gear. The four-shaft drives the planting power output shaft assembly through the bevel gear.

[0011] As a preferred solution: the planting power output shaft assembly includes an external spline safety clutch disk, a safety clutch cover, a clutch shaft and an internal spline safety clutch disk, the external spline safety clutch disk is rotatably arranged in the gearbox housing through a bearing, one end of the external spline safety clutch disk is fixed with a power output bevel gear, the safety clutch cover is fixed on the gearbox housing, the clutch shaft is rotatably arranged in the gearbox housing through a bearing, the internal spline safety clutch disk is sleeved on one end of the clutch shaft, a gasket is also fixed on the clutch shaft, a clutch spring is arranged between the internal spline safety clutch disk and the gasket, and the clutch spring presses the external spline safety clutch disk and the internal spline safety clutch disk tightly.

[0012] As a preferred solution: a slope surface is provided on the contact annular surface of the external spline safety clutch disc and the internal spline safety clutch disc.

[0013] As a preferred solution: a third skeleton oil seal is provided between the clutch shaft and the safety clutch cover, and a semicircular shaft ring is further provided between the external spline safety clutch disc and the power output bevel gear.

[0014] As a preferred solution: a second oil-free bearing is provided between the half-shaft gear and the gearbox housing.

[0015] As a preferred solution: the four-axis and the clutch shaft are driven by the meshing of the bevel gear and the power output bevel gear.

[0016] As a preferred solution: the speed change three-shaft assembly also includes a brake shaft, a first brake shoe and a second brake shoe, and a brake pull plate. The brake shaft is arranged in a gearbox housing through a bearing. The first brake shoe and the second brake shoe are respectively arranged on the brake shaft through a first oil-free bearing sleeve and are located on both sides of the three-axis spur gear. A brake pin shaft is also fixed on the side of the first brake shoe away from the three-axis spur gear. The contact surface between the first brake shoe and the brake pin shaft forms a spiral cone surface. When the brake shaft rotates, the first brake shoe and the second brake shoe clamp the three-axis spur gear. A brake pull plate is also fixed on the brake shaft.

[0017] As a preferred solution: the gearbox housing includes a left gearbox housing and a right gearbox housing fixed by bolts, and the travel power output shaft assembly is transmitted through the transmission shaft and the power input shaft.

[0018] The gearbox of the present invention adopts a multi-axis parallel setting, and the overall volume is small. Through the meshing transmission between gears, it not only has the speed change function of traveling, but also can meet the needs of four-wheel drive. The gearbox of the present invention can also drive the movement of the planting mechanism at the same time, and the transmission is reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the gearbox of the present invention;

[0020] Figure 2 for Figure 1 AA section view;

[0021] Figure 3 for Figure 1 BB cross-sectional view;

[0022] Figure 4 It is a schematic cross-sectional view of the safety clutch structure of the gearbox of the present invention;

[0023] Figure 5 It is a schematic diagram of the safety clutch structure of the gearbox of the present invention;

[0024] Figure 6 It is a cross-sectional schematic diagram of the brake structure of the gearbox of the present invention;

[0025] Figure 7 It is a schematic diagram of the brake structure of the gearbox of the present invention;

[0026] Figure 8 It is a schematic structural diagram of a one-way clutch of a gearbox of the present invention;

[0027] Fig. 9 It is a transmission principle diagram of the gearbox of the present invention;

[0028] Fig.10 It is a schematic diagram of the plant spacing switching structure of the gearbox of the present invention. DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0030] like Figures 1 to 10As shown, the present invention provides a riding rice transplanter gearbox, including a gearbox housing 606, and a planting power output shaft assembly 605, a travel power output shaft assembly 607, a half-shaft assembly, a speed-changing shaft assembly, a speed-changing shaft assembly, a speed-changing shaft assembly, a speed-changing shaft assembly, and a speed-changing shaft assembly.

[0031] The speed-changing one-axis assembly includes an axis 601, an axis travel gear 6306 fixed on the axis 601, and an axis planting one-way gear 6304 disposed on the axis 601 through a one-way bearing 6305.

[0032] The speed-changing two-shaft assembly includes two shafts 602, and two-shaft speed-changing large gears 6307, two-shaft speed-changing small gears 6309, two-shaft travel gears 6310 and planting double gears 6311, all of which are arranged on the two shafts 602. A speed-changing sliding sleeve 6308 is also arranged between the two-shaft speed-changing large gears 6307 and the two-shaft speed-changing small gears 6309. The speed-changing sliding sleeve 6308 is connected to a shift fork assembly 6025.

[0033] The speed-changing three-axis assembly includes three axes 603, three-axis spur gears 6203 and three-axis bevel gears 6205 fixed on the three axes 603; the speed-changing four-axis assembly includes four axes 604, bevel gears and a second pitch gear 6502 fixed on the four axes 604; the half-axle assembly includes half axes, half-axle gears 6302 and a first pitch gear 6501 fixed on the half axes;

[0034] The first shaft 601 and the second shaft 602 are driven by the meshing of the first shaft travel gear 6306 and the second shaft speed change gear 6307 or the second shaft speed change pinion 6309, and the second shaft 602 and the third shaft 603 are driven by the meshing of the second shaft travel gear 6310 and the third shaft spur gear 6203. The third shaft is also provided with a differential assembly 6206 for connecting the front axle drive shaft 908, and the third shaft is driven by the meshing of the third shaft bevel gear 6205 and the travel power output shaft assembly 607.

[0035] The one-shaft planting one-way gear 6304 on the one-shaft 601 is meshed with the planting double gear 6311 on the second shaft 602, and the planting double gear 6311 on the second shaft 602 is also meshed with the half-shaft gear 6302 on the half-shaft, thereby driving the half-shaft to rotate. The half-shaft and the four-shaft 604 are transmitted through the meshing of the first plant spacing gear 6501 and the second plant spacing gear 6502. The four-shaft 604 drives the planting power output shaft assembly 605 through the bevel gear.

[0036] Due to the effect of the one-way bearing, when one shaft rotates clockwise, it will drive the one-shaft planting one-way gear to rotate, and then drive the planting double gear to rotate. The planting double gear drives the half-shaft gear to rotate, and then drives the spacing gear to rotate. When one shaft rotates in the opposite direction, the one-shaft planting one-way gear will not rotate, protecting the transmission mechanism.

[0037] The planting power output shaft assembly 605 includes an external spline safety clutch disk 611, a safety clutch cover 618, a clutch shaft 615 and an internal spline safety clutch disk 612. The external spline safety clutch disk 611 is rotatably arranged in the gearbox housing 606 through a bearing. A power output bevel gear 619 is fixed to one end of the external spline safety clutch disk 611. The safety clutch cover 618 is fixed to the gearbox housing 606. The clutch shaft 615 is rotatably arranged in the gearbox housing 606 through a bearing. The internal spline safety clutch disk 612 is sleeved on one end of the clutch shaft 615. A gasket 614 is also fixed to the clutch shaft 615. A clutch spring 613 is arranged between the internal spline safety clutch disk 612 and the gasket 614. The clutch spring 613 presses the external spline safety clutch disk 611 and the internal spline safety clutch disk 612 tightly. A slope surface is provided on the contact annular surface of the outer spline safety clutch disc 611 and the inner spline safety clutch disc 612. When the torque of the power output bevel gear 619 exceeds the torque generated between the contact surfaces of the outer spline safety clutch disc and the inner spline safety clutch disc under the action of the safety clutch spring, the inner spline safety clutch disc moves backward and disengages from the outer spline safety clutch disc, and the power transmission is cut off.

[0038] A third skeleton oil seal 616 is provided between the clutch shaft 615 and the safety clutch cover 618 , and a semicircular shaft ring 617 is provided between the external spline safety clutch disc 611 and the power output bevel gear 619 .

[0039] A second oil-free bearing 6303 is provided between the side gear 6302 and the gearbox housing 606. The four-shaft 604 and the clutch shaft 615 are driven by the meshing of the bevel gear and the power output bevel gear 619.

[0040] The three-axis speed change assembly also includes a brake shaft 6207, a first brake shoe 6209, a second brake shoe 6211, and a brake pull plate 6212. The brake shaft 6207 is arranged in a gearbox housing through a bearing. The first brake shoe 6209 and the second brake shoe 6211 are respectively sleeved on the brake shaft 6207 through a first oil-free bearing 6210 and are located on both sides of the three-axis spur gear 6203. A brake pin shaft 6208 is also fixed on the side of the first brake shoe 6209 away from the three-axis spur gear 6203. The contact surface between the first brake shoe 6209 and the brake pin shaft 6208 forms a spiral cone surface. When the brake shaft 6207 rotates, the first brake shoe 6209 and the second brake shoe 6211 clamp the three-axis spur gear 6203. The brake pull plate 6212 is also fixed on the brake shaft 6207. Rotate the brake pull plate to drive the brake shaft and the brake pin shaft above it. The brake pin shaft moves along the spiral cone surface on the first brake shoe 6209, pushing the first brake shoe to the right, thereby pressing the three-axis spur gear together with the second brake shoe, thereby acting as a brake.

[0041] The gearbox housing 606 includes a left gearbox housing 6202 and a right gearbox housing 6201 fixed by bolts, and the travel power output shaft assembly 607 is transmitted to the power input shaft through the transmission shaft 608.

[0042] The above is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, which are also considered as the protection scope of the present invention.

Claims

1. A riding rice transplanter gearbox, characterized in that: The invention comprises a gearbox housing (606), and a planting power output shaft assembly (605), a walking power output shaft assembly (607), a half-shaft assembly, a first speed-changing shaft assembly, a second speed-changing shaft assembly, a third speed-changing shaft assembly and a fourth speed-changing shaft assembly, all of which are arranged in the gearbox housing (606). The speed-changing one-axis assembly comprises an axis (601), an axis traveling gear (6306) fixed on the axis (601), and an axis planting one-way gear (6304) arranged on the axis (601) via a one-way bearing (6305). The speed-changing two-shaft assembly comprises two shafts (602), and a two-shaft speed-changing large gear (6307), a two-shaft speed-changing small gear (6309), a two-shaft travel gear (6310) and a planting double gear (6311) all arranged on the two shafts (602); a speed-changing sliding sleeve (6308) is further arranged between the two-shaft speed-changing large gear (6307) and the two-shaft speed-changing small gear (6309); the speed-changing sliding sleeve (6308) is connected to a shift fork assembly (6025); The speed-changing three-axis assembly comprises three axes (603), three-axis spur gears (6203) and three-axis bevel gears (6205) all fixed on the three axes (603). The speed-changing four-axis assembly comprises a four-axis (604), a bevel gear fixed on the four-axis (604) and a second pitch gear (6502). The half-shaft assembly includes a half-shaft, a half-shaft gear (6302) and a first pitch gear (6501) both of which are fixed on the half-shaft. The first shaft (601) and the second shaft (602) are driven by meshing of the first shaft travel gear (6306) and the second shaft speed change gear (6307) or the second shaft speed change gear (6309); the second shaft (602) and the third shaft (603) are driven by meshing of the second shaft travel gear (6310) and the third shaft spur gear (6203); the third shaft is also provided with a differential assembly (6206) for connecting to the front axle drive shaft (908); and the third shaft is driven by meshing of the third shaft bevel gear (6205) and the travel power output shaft assembly (607). The one-shaft planting one-way gear (6304) on the one shaft (601) meshes with the planting double gear (6311) on the second shaft (602), and the planting double gear (6311) on the second shaft (602) also meshes with the half-shaft gear (6302) on the half shaft, thereby driving the half shaft to rotate. The half shaft and the fourth shaft (604) are driven by the meshing of the first plant spacing gear (6501) and the second plant spacing gear (6502), and the fourth shaft (604) drives the planting power output shaft assembly (605) through the bevel gear; The planting power output shaft assembly (605) comprises an external spline safety clutch disc (611), a safety clutch cover (618), a clutch shaft (615) and an internal spline safety clutch disc (612); the external spline safety clutch disc (611) is rotatably arranged in a gearbox housing (606) via a bearing; a power output bevel gear (619) is fixed to one end of the external spline safety clutch disc (611); the safety clutch cover (618) is fixed to the gearbox housing (606); The clutch shaft (615) is rotatably arranged in the gearbox housing (606) via a bearing, the inner spline safety clutch disc (612) is sleeved on one end of the clutch shaft (615), a gasket (614) is also fixed on the clutch shaft (615), a clutch spring (613) is arranged between the inner spline safety clutch disc (612) and the gasket (614), and the clutch spring (613) causes the outer spline safety clutch disc (611) and the inner spline safety clutch disc (612) to be pressed tightly; A second oil-free bearing (6303) is provided between the half-shaft gear (6302) and the gearbox housing (606).

2. A riding rice transplanter gearbox according to claim 1, characterized in that: A slope surface is provided on the contact annular surfaces of the external spline safety clutch disc (611) and the internal spline safety clutch disc (612).

3. The riding type rice transplanter gearbox according to claim 1, characterized in that: A third skeleton oil seal (616) is provided between the clutch shaft (615) and the safety clutch cover (618), and a semicircular shaft ring (617) is also provided between the external spline safety clutch disc (611) and the power output bevel gear (619).

4. The riding rice transplanter gearbox according to claim 1, characterized in that: The four-axis (604) and the clutch shaft (615) are driven by meshing of the bevel gear and the power output bevel gear (619).

5. The riding type rice transplanter gearbox according to claim 1, characterized in that: The speed-changing three-shaft assembly further comprises a brake shaft (6207), a first brake shoe (6209), a second brake shoe (6211), and a brake pull plate (6212). The brake shaft (6207) is arranged in a gearbox housing via a bearing. The first brake shoe (6209) and the second brake shoe (6211) are respectively sleeved on the brake shaft (6207) via a first oil-free bearing (6210) and are located on both sides of the three-shaft spur gear (6203). A brake pin shaft (6208) is also fixed to the side of the first brake shoe (6209) away from the three-axis spur gear (6203), and the contact surface between the first brake shoe (6209) and the brake pin shaft (6208) forms a spiral cone surface. When the brake shaft (6207) rotates, the first brake shoe (6209) and the second brake shoe (6211) clamp the three-axis spur gear (6203), and a brake pull plate (6212) is also fixed on the brake shaft (6207).

6. The riding type rice transplanter gearbox according to claim 1, characterized in that: The gearbox housing (606) comprises a left gearbox housing (6202) and a right gearbox housing (6201) fixed by bolts, and the travel power output shaft assembly (607) is transmitted to the power input shaft via the transmission shaft (608).

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