Cotton picker rear axle assembly based on modular design

Abstract

The utility model discloses a cotton picker rear axle assembly based on modular design, which comprises a rear axle shell, a differential mechanism is arranged in the rear axle shell, the differential mechanism is connected with a differential lock, the differential lock comprises a differential transmission shaft, a connecting sleeve, a first transmission gear and a second transmission gear are arranged on the differential transmission shaft, and the connecting sleeve is connected with the first transmission gear. The first transmission gear is fixedly connected with the differential transmission shaft, the second transmission gear is rotationally connected with the differential transmission shaft, an inner spline is arranged on the inner side wall of the connecting sleeve, an outer spline connected with the inner spline of the connecting sleeve is arranged on the differential transmission shaft and located on the side of the installation position of the second transmission gear, and the connecting sleeve is slidably connected to the outer spline part of the differential transmission shaft.

Description

Technical Field

[0001] The utility model relates to a cotton picker rear axle assembly based on modular design. Background Art

[0002] The cotton planting area in my country is quite extensive. In the past, cotton picking mainly relied on manual labor, which was labor-intensive and inefficient. With the development of agricultural machinery, cotton pickers have become more and more popular. Cotton pickers can effectively increase the speed of cotton picking, reduce labor, and improve the efficiency of warp connection. Among them, the rear axle of the cotton picker plays the role of steering the whole vehicle and is an important structure to ensure the normal operation of the vehicle.

[0003] A differential is usually used in the rear axle structure to achieve turning, but due to the working environment of the cotton picker, it is easy to encounter muddy conditions, which will cause slipping. At this time, a differential lock needs to be added to achieve the linkage of the left and right wheels. However, differential locks are mostly used on off-road vehicles, and the structure is relatively tight and the processing cost is relatively high. This patent aims to provide a differential lock with a simple structure and easy operation for use in cotton pickers. Utility Model Content

[0004] The purpose of the utility model is to solve the above deficiencies in the prior art and provide a cotton picker rear axle assembly based on modular design.

[0005] A cotton picker rear axle assembly based on modular design includes a rear axle housing, a differential is arranged inside the rear axle housing, the differential is connected to a differential lock, the differential lock includes a differential drive shaft, a connecting sleeve, a first transmission gear and a second transmission gear are arranged on the differential drive shaft, the first transmission gear is fixedly connected to the differential drive shaft, the second transmission gear is rotatably connected to the differential drive shaft, an inner spline is arranged on the inner side wall of the connecting sleeve, an outer spline connected to the inner spline of the connecting sleeve is arranged on the side of the second transmission gear installation position of the differential drive shaft, and the connecting sleeve is slidably connected to the outer spline part of the differential drive shaft;

[0006] The second transmission gear includes a gear tooth portion and an external spline portion, the external spline portion is used to mesh with the internal spline portion of the connecting sleeve, a connecting groove is provided on the outer side wall of the connecting sleeve, and the connecting sleeve is controlled to move by a shift fork mechanism, the shift fork mechanism includes a shift fork shaft and a sliding sleeve, a shift fork foot perpendicular to the axis is provided on the outer side wall of the sliding sleeve, the shift fork foot is inserted in the connecting groove, the sliding sleeve is connected to the rocker arm assembly, and the rocker arm assembly is used to control the movement of the sliding sleeve.

[0007] Preferably, the rocker arm assembly includes a rocker arm, a connecting column, and a connecting rod, one end of the connecting column is connected to one end of the rocker arm, the other end of the connecting column is connected to one end of the connecting rod, the other end of the connecting rod is connected to the fork shaft through a pin, and the connecting rod is parallel to the rocker arm.

[0008] Preferably, a first annular groove is provided on the outer arc surface of the fork shaft, and a limiting member that cooperates with the first annular groove is provided on the inner wall of the sliding sleeve.

[0009] Preferably, the cross section of the first annular groove is trapezoidal, and the width of the groove mouth is greater than the width of the groove bottom.

[0010] Preferably, the limiting member includes a card bead and a compression spring, a second annular groove with the axis of the sliding sleeve as the center is provided on the bottom surface of the sliding sleeve, a plurality of circular holes are provided on the inner wall of the second annular groove close to the axis at intervals along the circumferential direction, a spherical card bead is movably provided in the circular hole, and a compression spring is provided between the card bead and the inner wall of the second annular groove away from the axis of the fork.

[0011] Preferably, the differential includes a differential case, on which a bevel gear and a differential gear are provided, the differential gear is meshed with two rear axle drive gears, the two rear axle drive gears are respectively fixedly connected to the rear axle drive shafts, the rear axle drive shafts are used to transmit power to the wheels, the rear axle drive gears are perpendicular to the differential gears, the bevel gears are parallel to the rear axle drive gears, the bevel gears are perpendicular to the differential gears, the differential case is rotatably connected to the two rear axle drive shafts, and the two rear axle drive gears are respectively meshed with the first drive gear and the second drive gear.

[0012] Preferably, the two sides of the rear axle housing are respectively connected with a left axle housing and a right axle housing through flange structures, the left axle housing and the right axle housing are located outside the rear axle drive shaft, the rear axle drive shaft includes a main drive shaft and a secondary drive shaft, the main drive shaft is hinged with the secondary drive shaft, the main drive shaft is connected with the differential, the secondary drive shaft is connected with the side reduction mechanism, and the side reduction mechanism is hinged with the axle housing through a steering knuckle;

[0013] The front end face of the rear axle housing is connected to the auxiliary transmission housing through a flange structure. The auxiliary transmission housing is provided with an auxiliary transmission mechanism, which is used to transmit power to the differential. The front end face of the rear axle housing is also provided with a cylinder fixing plate. The surface of the cylinder fixing plate is provided with a through hole for the two-way hydraulic cylinder to pass through and fix. The two ends of the piston rod of the two-way hydraulic cylinder are respectively hinged to one end of a movable rod, and the other end of the movable rod is connected to the steering knuckle.

[0014] Beneficial effect: Compared with the prior art, the utility model locks the differential through a differential lock to prevent the vehicle from being unable to move when skidding. The differential lock controls the sliding sleeve to slide on the fork shaft through the rocker arm assembly, so that the connecting sleeve and the second transmission gear are meshed through the external spline structure, so that the second transmission gear is linked to the first transmission gear. When skidding, the rear axle transmission gear on the slipping side transmits power to the rear axle transmission gear on the side in contact with the ground through the first transmission gear and the second transmission gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a schematic diagram of a cotton picker rear axle assembly based on modular design;

[0016] Figure 2 It is an internal schematic diagram of a cotton picker rear axle assembly based on modular design;

[0017] Figure 3 It is a schematic diagram of the differential lock;

[0018] Figure 4 is a schematic diagram of the shift fork mechanism;

[0019] In the figure, 1, rear axle housing, 2, bridge frame housing, 3, two-way hydraulic cylinder, 4, movable rod, 5, differential, 6, rear axle drive shaft, 7, differential drive shaft, 8, second drive gear, 9, connecting sleeve, 10, first drive gear, 11, rocker arm, 12, connecting column, 13, connecting rod, 14, pin, 15, fork shaft, 16, first annular groove, 17, card bead, 18, sliding sleeve, 19, fork foot. DETAILED DESCRIPTION

[0020] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0021] like Figure 1-4 As shown, rear axle housing 1, bridge housing 2, two-way hydraulic cylinder 3, movable rod 4, differential 5, rear axle drive shaft 6, differential drive shaft 7, second drive gear 8, connecting sleeve 9, first drive gear 10, rocker arm 11, connecting column 12, connecting rod 13, pin 14, fork shaft 15, first annular groove 16, card bead 17, sliding sleeve 18, fork foot 19;

[0022] A rear axle assembly of a cotton picker based on modular design includes a rear axle housing 1, with a left axle housing 2 and a right axle housing 2 respectively connected to the two sides of the rear axle housing 1 through a flange structure, the left axle housing 2 and the right axle housing 2 are located outside the rear axle drive shaft 6, the rear axle drive shaft 6 includes a main drive shaft and a secondary drive shaft, the main drive shaft is hinged with the secondary drive shaft, the main drive shaft is connected with the differential 5, the secondary drive shaft is connected with the side reduction mechanism, and the side reduction mechanism is hinged with the axle housing 2 through a steering knuckle;

[0023] The front end face of the rear axle housing 1 is connected to the auxiliary transmission case through a flange structure. The auxiliary transmission case is provided with an auxiliary transmission mechanism, which is used to transmit power to the differential 5. The front end face of the rear axle housing 1 is also provided with a cylinder fixing plate. The surface of the cylinder fixing plate is provided with a through hole for the two-way hydraulic cylinder 3 to pass and fix. The two ends of the piston rod of the two-way hydraulic cylinder 3 are respectively hinged to one end of a movable rod 4, and the other end of the movable rod 4 is connected to the steering knuckle.

[0024] A differential 5 is provided inside the rear axle housing 1, and the differential 5 is connected to a differential lock. The differential lock includes a differential drive shaft 7, and a connecting sleeve 9, a first transmission gear 10, and a second transmission gear 8 are provided on the differential drive shaft 7. The first transmission gear 10 is fixedly connected to the differential drive shaft 7, and the second transmission gear 8 is rotatably connected to the differential drive shaft 7. An inner spline is provided on the inner side wall of the connecting sleeve 9, and an outer spline connected to the inner spline of the connecting sleeve 9 is provided on the side of the differential drive shaft 7 where the second transmission gear 8 is installed, and the connecting sleeve 9 is slidably connected to the outer spline part of the differential drive shaft 7;

[0025] The second transmission gear 8 includes a gear tooth portion and an external spline portion. The external spline portion is used to mesh with the internal spline portion of the connecting sleeve 9. The outer side wall of the connecting sleeve 9 is provided with a connecting groove. The connecting sleeve 9 is controlled to move by a shift fork mechanism. The shift fork mechanism includes a shift fork shaft 15 and a sliding sleeve. The outer side wall of the sliding sleeve is provided with a shift fork foot 19 perpendicular to the axis. The shift fork foot 19 is inserted in the connecting groove. The sliding sleeve 18 is connected to the rocker arm 11 assembly. The rocker arm 11 assembly is used to control the movement of the sliding sleeve 18.

[0026] The rocker arm 11 assembly includes a rocker arm 11, a connecting column 12, and a connecting rod 13. One end of the connecting column 12 is connected to one end of the rocker arm 11, the other end of the connecting column 12 is connected to one end of the connecting rod 13, the other end of the connecting rod 13 is connected to the fork shaft 15 through a pin 14, and the connecting rod 13 is parallel to the rocker arm 11.

[0027] A first annular groove 16 is formed on the outer arc surface of the shift fork shaft 15 , and a limiting member that cooperates with the first annular groove 16 is formed on the inner wall of the sliding sleeve 18 .

[0028] The cross section of the first annular groove 16 is a trapezoid, and the width of the groove opening is greater than the width of the groove bottom.

[0029] The limiting member includes a card bead 17 and a compression spring. A second annular groove with the axis of the sliding sleeve 18 as the center is provided on the bottom surface of the sliding sleeve 18. A plurality of circular holes are provided on the inner side wall of the second annular groove close to the axis at intervals along the circumferential direction. A spherical card bead 17 is movably provided in the circular hole. A compression spring is provided between the card bead 17 and the inner side wall of the second annular groove away from the fork shaft 15 line.

[0030] The differential 5 includes a differential case, on which bevel gears and differential gears are provided. The differential gears are meshed with two rear axle drive gears, and the two rear axle drive gears are respectively fixedly connected to the rear axle drive shaft 6. The rear axle drive shaft 6 is used to transmit power to the wheels. The rear axle drive gears are perpendicular to the differential gears, and the bevel gears are parallel to the rear axle drive gears. The bevel gears are perpendicular to the differential gears. The differential case is rotatably connected to the two rear axle drive shafts 6, and the two rear axle drive gears are respectively meshed with the first drive gear 10 and the second drive gear 8.

[0031] Instructions for use: Drive the rocker arm 11 to move the sliding sleeve 18 on the fork shaft 15, and at the same time the fork foot 19 drives the connecting sleeve 9 to move on the differential drive shaft 7 until it engages with the second transmission gear through the spline structure, and the rear axle drive gear on the rear axle drive shaft 6 engages with the first transmission gear 10 and the second transmission gear 8. At this time, the two rear axle drive gears are in a linkage state.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cotton picker rear axle assembly based on modular design, characterized in that: The invention comprises a rear axle housing, wherein a differential is arranged inside the rear axle housing, wherein the differential is connected to a differential lock, wherein the differential lock comprises a differential drive shaft, wherein a connecting sleeve, a first transmission gear and a second transmission gear are arranged on the differential drive shaft, wherein the first transmission gear is fixedly connected to the differential drive shaft, wherein the second transmission gear is rotationally connected to the differential drive shaft, wherein an inner spline is arranged on the inner side wall of the connecting sleeve, wherein an outer spline connected to the inner spline of the connecting sleeve is arranged on the side of the installation position of the second transmission gear, and wherein the connecting sleeve is slidably connected to the outer spline portion of the differential drive shaft; The second transmission gear includes a gear tooth portion and an external spline portion, the external spline portion is used to mesh with the internal spline portion of the connecting sleeve, the outer side wall of the connecting sleeve is provided with a connecting groove, the connecting sleeve is controlled to move by a shift fork mechanism, the shift fork mechanism includes a shift fork shaft and a sliding sleeve, the outer side wall of the sliding sleeve is provided with a shift fork foot perpendicular to the axis, the shift fork foot is inserted in the connecting groove, the sliding sleeve is connected to a rocker arm assembly, and the rocker arm assembly is used to control the movement of the sliding sleeve.

2. The rear axle assembly of a cotton picker based on modular design according to claim 1 is characterized in that: The rocker arm assembly includes a rocker arm, a connecting column, and a connecting rod. One end of the connecting column is connected to one end of the rocker arm, the other end of the connecting column is connected to one end of the connecting rod, the other end of the connecting rod is connected to the fork shaft through a pin, and the connecting rod is parallel to the rocker arm.

3. The rear axle assembly of a cotton picker based on modular design according to claim 1 is characterized in that: The outer arc surface of the shift fork shaft is provided with a first annular groove, and the inner wall of the sliding sleeve is provided with a limiting member that cooperates with the first annular groove.

4. The rear axle assembly of a cotton picker based on modular design according to claim 3 is characterized in that: The cross section of the first annular groove is a trapezoid, and the width of the groove opening is greater than the width of the groove bottom.

5. The rear axle assembly of a cotton picker based on modular design according to claim 3 is characterized in that: The limiting member includes a card bead and a compression spring. A second annular groove with the axis of the sliding sleeve as the center is provided on the bottom surface of the sliding sleeve. A plurality of circular holes are provided on the inner side wall of the second annular groove close to the axis at intervals along the circumferential direction. A spherical card bead is movably provided in the circular hole. A compression spring is provided between the card bead and the inner side wall of the second annular groove away from the axis of the shift fork.

6. The rear axle assembly of a cotton picker based on modular design according to claim 1 is characterized in that: The differential includes a differential case, on which a bevel gear and a differential gear are provided. The differential gear is meshed with two rear axle drive gears, and the two rear axle drive gears are respectively fixedly connected to the rear axle drive shafts. The rear axle drive shafts are used to transmit power to the wheels. The rear axle drive gears are perpendicular to the differential gears, the bevel gears are parallel to the rear axle drive gears, the bevel gears are perpendicular to the differential gears, the differential case is rotatably connected to the two rear axle drive shafts, and the two rear axle drive gears are respectively meshed with the first drive gear and the second drive gear.

7. The rear axle assembly of a cotton picker based on modular design according to claim 1 is characterized in that: The two sides of the rear axle housing are respectively connected with a left axle housing and a right axle housing through flange structures. The left axle housing and the right axle housing are located outside the rear axle drive shaft. The rear axle drive shaft includes a main drive shaft and a secondary drive shaft. The main drive shaft is hinged with the secondary drive shaft. The main drive shaft is connected with the differential. The secondary drive shaft is connected with the side reduction mechanism. The side reduction mechanism is hinged with the axle housing through a steering knuckle. The front end face of the rear axle housing is connected to the auxiliary transmission housing through a flange structure. The auxiliary transmission housing is provided with an auxiliary transmission mechanism, which is used to transmit power to the differential. The front end face of the rear axle housing is also provided with a cylinder fixing plate. The surface of the cylinder fixing plate is provided with a through hole for the two-way hydraulic cylinder to pass through and fix. The two ends of the piston rod of the two-way hydraulic cylinder are respectively hinged to one end of a movable rod, and the other end of the movable rod is connected to the steering knuckle.

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