A brake mechanism on a small rice transplanter gearbox

Abstract

The present invention relates to a brake mechanism on a small rice transplanter gearbox, comprising a gearbox housing, and a travel power output shaft assembly and a speed-changing three-axis assembly arranged in the gearbox housing, wherein the speed-changing three-axis assembly comprises three axes, three-axis spur gears all fixed on the three axes, three-axis bevel gears, a brake shaft, a first brake shoe and a second brake shoe, and a brake pull plate, wherein the brake shaft is arranged in the gearbox housing through a bearing, wherein 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, wherein a brake pin is also fixed on the side of the first brake shoe away from the three-axis spur gear, wherein the contact surface between the first brake shoe and the brake pin forms a spiral cone surface, wherein when the brake shaft rotates, the first brake shoe and the second brake shoe clamp the three-axis spur gear, and a brake pull plate is also fixed on the brake shaft. The present invention has a simple overall structure and better effects.

Description

Technical Field

[0001] The invention belongs to the field of rice transplanter gearboxes, and in particular relates to a brake mechanism on a small rice transplanter gearbox. 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 brake mechanism on a gearbox of a small rice transplanter, which has a simpler structure and a better braking effect.

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

[0006] A brake mechanism on a small rice transplanter gearbox includes a gearbox housing, a travel power output shaft assembly and a speed-changing three-axis assembly arranged in the gearbox housing, the speed-changing three-axis assembly including three axes, three-axis spur gears all fixed on the three axes, a three-axis bevel gear, a brake shaft, a first brake shoe and a second brake shoe, and a brake pull plate. The brake shaft is arranged in the 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, and 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, and a brake pull plate is also fixed on the brake shaft.

[0007] As a preferred solution: the three shafts are also provided with a differential assembly for connecting the front axle drive shaft, and the three shafts are meshed and driven with the travel power output shaft assembly through three-shaft bevel gears.

[0008] As a preferred solution: the gearbox housing includes a left gearbox housing and a right gearbox housing fixed by bolts.

[0009] The gearbox of the present invention adopts the method of clamping the three-axis spur gear with two brake shoes to achieve braking. When the brake pull plate is rotated, the brake shaft and the brake pin shaft thereon are driven, and the brake pin shaft moves along the spiral cone surface on the first brake shoe, pushing the first brake shoe to the right, thereby pressing the three-axis spur gear with the second brake shoe, thereby achieving the braking effect. The overall structure is simple and the effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the gearbox of the present invention;

[0011] Figure 2 for Figure 1 AA section view;

[0012] Figure 3 for Figure 1 BB cross-sectional view;

[0013] Figure 4 It is a schematic cross-sectional view of the safety clutch structure of the gearbox of the present invention;

[0014] Figure 5 It is a schematic diagram of the safety clutch structure of the gearbox of the present invention;

[0015] Figure 6 It is a cross-sectional schematic diagram of the brake structure of the gearbox of the present invention;

[0016] Figure 7 It is a schematic diagram of the brake structure of the gearbox of the present invention;

[0017] Figure 8 It is a schematic structural diagram of a one-way clutch of a gearbox of the present invention;

[0018] Fig. 9 It is a transmission principle diagram of the gearbox of the present invention;

[0019] Fig.10 It is a schematic diagram of the plant spacing switching structure of the gearbox of the present invention. DETAILED DESCRIPTION

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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;

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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 .

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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 brake mechanism on a small rice transplanter gearbox, characterized in that: The invention comprises a gearbox housing (606), a travel power output shaft assembly (607) and a speed-changing three-axis assembly arranged in the gearbox housing (606), wherein the speed-changing three-axis assembly comprises three axes (603), three-axis spur gears (6203) all fixed on the three axes (603), three-axis bevel gears (6205), a brake shaft (6207), a first brake shoe (6209) and a second brake shoe (6211), and a brake pull plate (6212), wherein the brake shaft (6207) is arranged in the gearbox housing through a bearing, and 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 the three axes. On both sides of the 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), 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); The three shafts are also provided with a differential assembly (6206) for connecting to the front axle drive shaft (908), and the three shafts are meshed with the travel power output shaft assembly (607) through the three-shaft bevel gears (6205); The gearbox housing (606) comprises a left gearbox housing (6202) and a right gearbox housing (6201) fixed by bolts.

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