A plant spacing switching mechanism for a small rice transplanter

Abstract

The present invention relates to a plant spacing switching mechanism for a small rice transplanter, comprising a gearbox housing, and a half-shaft assembly and a speed-changing four-shaft assembly both arranged in the gearbox housing, the speed-changing four-shaft assembly comprising a four-shaft, a bevel gear and a second plant spacing gear arranged on the four-shaft, the four-shaft passes through the gearbox housing, the second plant spacing gear is arranged on the portion of the four-shaft passing through the gearbox housing, the half-shaft assembly comprises a half-shaft, a half-shaft gear and a first plant spacing gear both arranged on the half-shaft, the half-shaft passes through the gearbox housing, the first plant spacing gear is arranged on the portion of the half-shaft passing through the gearbox housing, the half-shaft and the four-shaft are driven by meshing of the first plant spacing gear and the second plant spacing gear, and the first plant spacing gear and the second plant spacing gear are provided with a protective cover, and the four-shaft drives a transplanting power output shaft assembly through the bevel gear. The present invention has a simple overall structure and is convenient to operate.

Description

Technical Field

[0001] The invention belongs to the field of rice transplanter gearboxes, and in particular relates to a plant spacing switching mechanism for a small 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 rice transplanter gearbox 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, the gearbox either does not have a plant spacing switching mechanism or the switching mechanism is relatively complex and costly. Summary of the invention

[0004] In order to solve the above technical problems, the purpose of the present invention is to provide a plant spacing switching mechanism for a small rice transplanter, which has a simple structure and is easy to operate.

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

[0006] A plant spacing switching mechanism for a small rice transplanter comprises a gearbox housing, and a half-axle assembly, a first-speed shifting shaft assembly, a second-speed shifting shaft assembly and a fourth-speed shifting 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-shaft assembly includes two shafts, and two-shaft speed-changing large gears, two-shaft speed-changing small gears, two-shaft travel gears and planting double gears, all of which are arranged on the two shafts.

[0009] The speed-changing four-shaft assembly includes a four-shaft, a bevel gear and a second pitch gear arranged on the four-shaft, the four-shaft passes through the gearbox housing, and the second pitch gear is arranged on the portion of the four-shaft passing through the gearbox housing.

[0010] The half-shaft assembly includes a half-shaft, a half-shaft gear and a first pitch gear, both of which are arranged on the half-shaft. The half-shaft passes through the gearbox housing, and the first pitch gear is arranged on the portion of the half-shaft passing through the gearbox housing.

[0011] The first shaft and the second shaft are driven by the meshing of the first shaft running gear and the second shaft speed change gear or the second shaft speed change pinion.

[0012] 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, and the first plant spacing gear and the second plant spacing gear are provided with protective covers. The four-shaft drives the planting power output shaft assembly through the bevel gear.

[0013] As a preferred solution: the first plant spacing gear is detachably arranged on the half shaft, and the second plant spacing gear is detachably arranged on the fourth shaft.

[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 gearbox housing includes a left gearbox housing and a right gearbox housing fixed by bolts.

[0016] In the present invention, the four shafts and the half shafts that drive the planting mechanism are meshed and transmitted through the first plant spacing gear and the second plant spacing gear. The first plant spacing gear and the second plant spacing gear are both located outside the gearbox and are separately provided with protective covers. By removing the protective cover and replacing the first plant spacing gear and the second plant spacing gear with different gear ratios, the plant spacing can be switched. The present invention has a simple overall structure and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the gearbox of the present invention;

[0018] Figure 2 for Figure 1 AA section view;

[0019] Figure 3 for Figure 1 BB cross-sectional view;

[0020] Figure 4 It is a schematic cross-sectional view of the safety clutch structure of the gearbox of the present invention;

[0021] Figure 5 It is a schematic diagram of the safety clutch structure of the gearbox of the present invention;

[0022] Figure 6 It is a cross-sectional schematic diagram of the brake structure of the gearbox of the present invention;

[0023] Figure 7 It is a schematic diagram of the brake structure of the gearbox of the present invention;

[0024] Figure 8It is a schematic structural diagram of a one-way clutch of a gearbox of the present invention;

[0025] Fig. 9 It is a transmission principle diagram of the gearbox of the present invention;

[0026] Fig.10 It is a schematic diagram of the plant spacing switching structure of the gearbox of the present invention. DETAILED DESCRIPTION

[0027] 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.

[0028] like Figures 1 to 10 As 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.

[0029] 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.

[0030] 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.

[0031] The speed-changing three-axis assembly includes 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 includes four axes 604, bevel gears fixed on the four axes 604 and a second spacing gear 6502; the four axes 604 pass through the gearbox housing 606; the second spacing gear 6502 is arranged on the portion of the four axes 604 passing through the gearbox housing 606; the half-axle assembly includes half axes, half-axle gears 6302 and a first spacing gear 6501 all fixed on the half axes; the half axes pass through the gearbox housing 606; the first spacing gear 6501 is arranged on the portion of the half axes passing through the gearbox housing 606;

[0032] 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.

[0033] 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, and the first plant spacing gear 6501 and the second plant spacing gear 6502 are provided with protective covers. The four-shaft 604 drives the planting power output shaft assembly 605 through the bevel gear.

[0034] 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.

[0035] 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 .

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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 plant spacing switching mechanism for a small rice transplanter, characterized in that: It comprises a gearbox housing (606), and a half-shaft assembly, a first-speed shift shaft assembly, a second-speed shift shaft assembly, and a fourth-speed shift 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 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 arranged on the two shafts (602). The speed-changing four-shaft assembly comprises a four-shaft (604), a bevel gear and a second pitch gear (6502) arranged on the four-shaft (604), the four-shaft (604) passing through a gearbox housing (606), and the second pitch gear (6502) being arranged on a portion of the four-shaft (604) passing through the gearbox housing (606). The half-shaft assembly comprises a half-shaft, a half-shaft gear (6302) and a first pitch gear (6501) both of which are arranged on the half-shaft. The half-shaft passes through the gearbox housing (606). The first pitch gear (6501) is arranged on the portion of the half-shaft passing through the gearbox housing (606). The first shaft (601) and the second shaft (602) are driven by meshing of the first shaft running gear (6306) and the second shaft speed change gear (6307) or the second shaft speed change pinion (6309). The one-axis planting one-way gear (6304) on the one-axis (601) is meshed with the planting double gear (6311) on the second axis (602), and the planting double gear (6311) on the second axis (602) is also meshed with the half-axis gear (6302) on the half-axis, thereby driving the half-axis to rotate. The half-axis and the fourth axis (604) are meshed and driven by the first plant spacing gear (6501) and the second plant spacing gear (6502), and the first plant spacing gear (6501) and the second plant spacing gear (6502) are provided with protective covers. The fourth axis (604) drives the planting power output shaft assembly (605) through the bevel gear. The first plant spacing gear (6501) is detachably arranged on the half shaft, and the second plant spacing gear (6502) is detachably arranged on the fourth shaft; A second oil-free bearing (6303) is provided between the half-shaft gear (6302) and the gearbox housing (606).

2. A small rice transplanter plant spacing switching mechanism according to claim 1, characterized in that: The gearbox housing (606) comprises a gearbox left housing (6202) and a gearbox right housing (6201) fixed by bolts.

Images