Steering gear shifting device of agricultural operation machine

Abstract

The utility model relates to the technical field of agricultural machinery, in particular to a steering gear shifting device of agricultural operation machinery, which comprises a transmission box body, a hollow shaft, an output shaft, an executing rod and a driving rod, the hollow shaft is in transmission connection with the output shaft, a transmission body is arranged between the driving rod and the executing rod, and the transmission body is in point contact with the executing rod through the transmission body. The hollow shaft is internally provided with a reset part used for resetting the execution rod, the hollow shaft is internally provided with a limiting part, and the execution rod has a meshing position and a releasing position in the stroke range; driven teeth are installed on the output shaft, the hollow shaft is sleeved with a steering gear used for being meshed with the limiting piece, and the driven teeth are meshed with the steering gear. Abrasion of the joint of the driving rod and the executing rod is effectively avoided, smooth connection of the driving rod and the executing rod is conveniently achieved, repeated replacement of parts is avoided, the structural reliability is improved, and the service life is effectively prolonged.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, and in particular to a steering and shifting device for agricultural machinery. Background Technology

[0002] The steering control device of existing agricultural machinery gearboxes generally includes a hollow shaft driven by a central drive gear. A steering gear is slidably mounted on each side of the central drive gear on the hollow shaft. The central drive gear receives torque from the shift gear of the previous stage of the gearbox. Each of the two steering gears is connected to drive the left and right output shafts via a set of drive gears. A control rod is slidably mounted inside the hollow shaft. The hollow shaft has through holes at the positions of the two steering gears. The control rod has an annular groove with a height difference on at least one side at the positions of the two steering gears. A locking pin is provided at the through hole of the hollow shaft. The locking pin, pushed and squeezed by the height difference side of the control rod groove, enters the through hole of the hollow shaft and extends out of the through hole to engage with the groove of the steering gear. The control rod can only move axially along the hollow shaft and does not rotate.

[0003] When the agricultural machine turns, pushing the control lever causes the locking pin in the one-way recess to extend out of the hollow shaft through hole and connect with the steering gear. The steering gear in that direction drives the transmission gear and output shaft in the same direction, causing the drive wheel driven by the output shaft in that direction to rotate. However, the locking pin of the control lever in the other direction is not in the hollow shaft through hole, so it does not drive the steering gear in that direction to rotate, causing the drive wheel in that direction to remain stationary and rub against each other.

[0004] In existing steering systems, the steering drive component typically contacts the control lever surface. An external force is applied to move the steering drive component, which in turn moves the control lever along its own axial direction. Since the contact area is a contact surface, the connection between the steering drive component and the control lever is prone to wear when the control lever rotates synchronously with the hollow shaft and the corresponding steering gear. This causes the transmission between the drive lever and the control lever to become stuck and not smooth, requiring repeated replacement of parts, which affects the reliability of the structure and reduces its service life. Utility Model Content

[0005] This utility model addresses the shortcomings of existing technologies by providing a steering shifting device for agricultural machinery. It effectively avoids wear at the connection between the drive rod and the actuator rod, facilitates a smooth connection between the drive rod and the actuator rod, avoids repeated replacement of parts, improves structural reliability, and effectively extends service life.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] This utility model provides a steering shifting device for agricultural machinery, including a transmission housing, a hollow shaft rotatably connected to the transmission housing and at least one output shaft, at least one actuator slidably connected to the hollow shaft and a drive rod slidably connected to the transmission housing. The hollow shaft is drivenly connected to the output shaft, and a transmission body is installed between the drive rod and the actuator. The transmission body and the actuator make point contact with each other. A reset component for resetting the actuator is provided inside the hollow shaft. A limit component is provided inside the hollow shaft. The actuator has an engagement position and a release position within its stroke range.

[0008] A driven tooth is installed on the output shaft, and a steering gear for meshing with a limiting member is sleeved on the hollow shaft; the driven tooth meshes with the steering gear.

[0009] When steering is not required, the actuator is in the engaged position, and the limiting member engages with the steering gear;

[0010] When steering is required, press the drive rod, which drives the transmission body to squeeze the actuator rod. The reset component is compressed, the actuator rod moves to the release position, and the limiting component disengages from the steering gear.

[0011] The transmission housing is rotatably connected to a drive shaft, one end of which extends into the transmission housing and is connected to a first bevel gear. The hollow shaft is connected to a second bevel gear, and the first bevel gear meshes with the second bevel gear.

[0012] The output shaft, actuator, and drive rod are provided in at least two configurations. The actuators are symmetrically arranged at both ends of the hollow shaft, and the drive rods are symmetrically arranged at both ends of the hollow shaft and correspond one-to-one with the actuators.

[0013] The transmission housing is equipped with a positioning sleeve, the positioning sleeve is equipped with a first bearing, and the transmission housing is equipped with a second bearing. The first and second bearings are located on opposite sides of the driven gear and are mounted on the output shaft.

[0014] The steering gear has several mating grooves on its inner side, the hollow shaft has a through hole, the limiting member passes through the through hole, and the actuator has a receiving space.

[0015] When the actuator is in the release position, one end of the limit member extends into the receiving space;

[0016] When the actuator is in the engaged position, one end of the limiting member extends into the mating groove.

[0017] The transmission housing is hinged to a steering arm, which has an abutment portion for contacting the outer end of the drive rod.

[0018] The steering arm is provided with a rotating shaft, the transmission housing is equipped with a rotating support plate, the two ends of the rotating shaft are respectively rotatably connected to the transmission housing and the rotating support plate, and the abutment part is provided on the rotating shaft.

[0019] The beneficial effects of this utility model are:

[0020] It effectively avoids wear at the connection between the drive rod and the actuator rod, can smoothly control the connection state between the hollow shaft and the output shaft, and smoothly realizes steering switching. It facilitates a smooth connection between the drive rod and the actuator rod, avoids repeated replacement of parts, improves structural reliability, and effectively extends service life. Attached Figure Description

[0021] Figure 1 This is a cross-sectional view of the steering and shifting device of this agricultural machinery.

[0022] Figure 2 This is a three-dimensional view of the steering and shifting device of this agricultural machinery.

[0023] 1. Transmission housing; 11. Drive shaft; 12. First bevel gear; 1301. Rotating support plate;

[0024] 13. Positioning sleeve; 131. First bearing;

[0025] 2. Hollow shaft; 201. Through hole;

[0026] 21. Limiting component; 22. Steering gear; 23. Second bevel gear; 2201. Connecting groove;

[0027] 3. Output shaft; 31. Driven gear; 32. Second bearing;

[0028] 4. Actuating lever; 401. Accommodating space; 41. Engaged position; 42. Release position;

[0029] 5. Drive rod;

[0030] 6. Transmission unit;

[0031] 7. Reset component;

[0032] 8. Steering arm; 81. Abutment part; 82. Rotating shaft. Detailed Implementation

[0033] To facilitate understanding by those skilled in the art, the present invention will be further described below in conjunction with embodiments and accompanying drawings. Specific embodiments of the present invention will be described below. It should be noted that, in order to provide a concise description, this specification cannot provide a detailed description of all features of the actual embodiments.

[0034] refer to Figures 1 to 2 As shown, this utility model provides a steering shifting device for agricultural machinery, including a transmission housing 1, a hollow shaft 2 rotatably connected to the transmission housing 1, at least one output shaft 3, at least one actuator 4 slidably connected to the hollow shaft 2, and a drive rod 5 slidably connected to the transmission housing 1. The hollow shaft 2 is drivenly connected to the output shaft 3. A transmission body 6 is installed between the drive rod 5 and the actuator 4. The transmission body 6 and the actuator 4 are in point contact. A reset component 7 for resetting the actuator 4 is provided inside the hollow shaft 2. A limit member 21 is provided inside the hollow shaft 2. The actuator 4 has an engagement position 41 and a release position 42 within its stroke range. A driven gear 31 is installed on the output shaft 3. A steering gear 22 for meshing with the limit member 21 is sleeved on the hollow shaft 2. The driven gear 31 meshes with the steering gear 22.

[0035] refer to Figure 1 As shown, in practical applications, since the transmission body 6 and the actuator 4 are in point contact, and the transmission body 6 is a steel ball, the actuator 4 and the transmission body 6 transmit force through point contact, ensuring that the force is smoothly transmitted between the actuator 4 and the transmission body 6. When the actuator 4 rotates, it only transmits a slight frictional force to the transmission body 6 through point contact. This frictional force will not cause significant structural damage to the transmission body 6, effectively avoiding wear at the connection between the drive rod and the actuator. The drive rod 5 and the actuator 4 are smoothly connected, avoiding repeated replacement of parts, improving structural reliability, and effectively extending service life. When steering is not required, the actuator 4 is in the engagement position 41, and the limiting member 21 is engaged with the steering gear 22, facilitating smooth torque transmission. When steering is required, the drive rod 5 is pressed, and the drive rod 5 drives the transmission body 6 to squeeze the actuator 4. The reset member 7 is compressed, and the actuator 4 moves to the release position 42. The limiting member 21 disengages from the steering gear 22, and the torque transmission between the hollow shaft 2 and the steering gear 22 is disconnected, facilitating the rotation of the corresponding output shaft 3, thereby smoothly realizing steering switching and smoothly switching steering requirements under different working conditions.

[0036] refer to Figure 1 As shown, in this embodiment, the transmission housing 1 is rotatably connected to a drive shaft 11. One end of the drive shaft 11 extends into the transmission housing 1 and is connected to a first bevel gear 12. The hollow shaft 2 is connected to a second bevel gear 23. The first bevel gear 12 and the second bevel gear 23 mesh. The drive shaft 11 is connected to a drive device, which drives the drive shaft 11 to rotate. Thus, the first bevel gear 12 and the second bevel gear 23 drive the hollow shaft 2 to rotate, smoothly driving the hollow shaft 2 to rotate. Compared with the existing multi-stage transmission structure to drive the hollow shaft 2 to rotate, the structure is simpler, the transmission is more convenient, and the rotation efficiency is improved.

[0037] refer to Figure 1As shown in this embodiment, at least two of the output shaft 3, the actuator 4, and the drive rod 5 are provided. The actuator 4 is symmetrically arranged at both ends of the hollow shaft 2, and the drive rod 5 is symmetrically arranged at both ends of the hollow shaft 2 and corresponds one-to-one with the actuator 4. This facilitates the rotation of at least two output shafts 3 by rotating the hollow shaft 2. The number and arrangement of the output shaft 3, actuator 4, and drive rod 5 can be adjusted according to actual needs to adapt to different application scenarios. The structure is simple, easy to maintain, and has high reliability and service life.

[0038] refer to Figure 1 As shown, in this embodiment, the transmission housing 1 is equipped with a positioning sleeve 13, the positioning sleeve 13 is equipped with a first bearing 131, and the transmission housing 1 is equipped with a second bearing 32. The first bearing 131 and the second bearing 32 are located on both sides of the driven gear 31. The first bearing 131 and the second bearing 32 are installed on the output shaft 3, and the output shaft 3 can rotate smoothly in the transmission housing 1, so that the output shaft 3 has two support points located on both sides of the driven gear 31, which facilitates the stable rotation of the output shaft 3, and achieves a balance between high precision, high stability and easy maintenance. It is suitable for heavy loads and increases the service life of the equipment.

[0039] refer to Figure 1 As shown, in this embodiment, the inner side of the steering gear 22 is provided with several mating grooves 2201, the hollow shaft 2 is provided with a through hole 201, the limiting member 21 passes through the through hole 201, and the actuator 4 is provided with a receiving space 401. In actual application, when the actuator is in the release position 42, one end of the limiting member 21 extends into the receiving space 401, and the limiting member 21 disengages from the steering gear 22, thereby realizing steering; when the actuator is in the engagement position 41, one end of the limiting member 21 extends into the mating groove 2201, and the limiting member 21 engages with the steering gear 22, thereby realizing the transmission connection between the hollow shaft 2 and the output shaft 3.

[0040] refer to Figure 1 , 2 As shown, in this embodiment, the transmission housing 1 is hinged with a steering arm 8, and the steering arm 8 is provided with an abutment portion 81, which is used to abut against the outer end of the drive rod 5. In actual application, when steering is required, the steering arm 8 rotates under force from the initial state and presses the drive rod 5 through the abutment portion 81, causing the drive rod 5 to drive the transmission body 6 to press the reset component 7 until the actuator 4 moves to the release position 42, thereby smoothly driving the output shaft 3 to rotate, thus realizing steering. When steering is not required, the force on the steering arm 8 is lost, and under the elastic force of the reset component 7, the actuator 4, transmission body 6 and drive rod 5 move. The drive rod 5 pushes the steering arm 8 to swing through the abutment portion 81 until the steering arm 8 is in the initial state and the actuator 4 is in the engagement position 41, thereby accurately determining the moving position of the actuator 4 and improving the structural reliability.

[0041] refer to Figure 1 , 2 As shown, in this embodiment, the steering arm 8 is provided with a rotating shaft 82, the transmission housing 1 is equipped with a rotating support plate 1301, the two ends of the rotating shaft 82 are rotatably connected to the transmission housing 1 and the rotating support plate 1301 respectively, and the abutment part 81 is provided on the rotating shaft 82; when the steering arm 8 rotates, it drives the rotating shaft 82 to rotate, which drives the abutment part 81 to press the drive rod 5, which facilitates the smooth pushing of the drive rod 5 and the transmission body 6. By extending the rotation power arm through the steering arm 8, the force required to move the actuator rod 4 is saved, making it easy to push the drive rod 5.

[0042] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present utility model without departing from the scope of the present utility model shall fall within the scope of the present utility model.

Claims

1. A steering shifting device for agricultural machinery, characterized in that, The device includes a transmission housing (1), a hollow shaft (2) rotatably connected to the transmission housing (1), at least one output shaft (3), at least one actuator (4) slidably connected to the hollow shaft (2), and a drive rod (5) slidably connected to the transmission housing (1). The hollow shaft (2) is connected to the output shaft (3). A transmission body (6) is installed between the drive rod (5) and the actuator (4). The transmission body (6) and the actuator (4) are in point contact. A reset component (7) for resetting the actuator (4) is provided inside the hollow shaft (2). A limit component (21) is provided inside the hollow shaft (2). The actuator (4) has an engagement position (41) and a release position (42) within its stroke range. A driven gear (31) is installed on the output shaft (3), and a steering gear (22) for meshing with the limiting member (21) is sleeved on the hollow shaft (2). The driven gear (31) meshes with the steering gear (22). When steering is not required, the actuator (4) is in the engagement position (41), and the limiting member (21) is engaged with the steering gear (22); When a turn is required, press the drive rod (5), the drive rod (5) drives the transmission body (6) to squeeze the actuator (4), the reset component (7) is compressed, the actuator (4) moves to the release position (42), and the limit member (21) disengages from the steering gear (22).

2. The agricultural machinery steering shifting device according to claim 1, characterized in that, The transmission housing (1) is rotatably connected to a drive shaft (11), one end of which extends into the transmission housing (1) and is connected to a first bevel gear (12). The hollow shaft (2) is connected to a second bevel gear (23), and the first bevel gear (12) meshes with the second bevel gear (23).

3. The agricultural machinery steering shifting device according to claim 1, characterized in that, At least two of the output shaft (3), the actuator (4) and the drive rod (5) are provided. The actuator (4) is symmetrically arranged at both ends of the hollow shaft (2), and the drive rod (5) is symmetrically arranged at both ends of the hollow shaft (2) and corresponds one-to-one with the actuator (4).

4. The agricultural machinery steering shifting device according to claim 1, characterized in that, The transmission housing (1) is equipped with a positioning sleeve (13), the positioning sleeve (13) is equipped with a first bearing (131), the transmission housing (1) is equipped with a second bearing (32), the first bearing (131) and the second bearing (32) are located on both sides of the driven gear (31), and the first bearing (131) and the second bearing (32) are installed on the output shaft (3).

5. The agricultural machinery steering shifting device according to claim 1, characterized in that, The steering gear (22) has several mating grooves (2201) on its inner side, the hollow shaft (2) has a through hole (201), the limiting member (21) passes through the through hole (201), and the actuator (4) has a receiving space (401). When the actuator is in the release position (42), one end of the limit member (21) extends into the receiving space (401). When the actuator is in the engagement position (41), one end of the limiting member (21) extends into the mating groove (2201).

6. The agricultural machinery steering shifting device according to claim 1, characterized in that, The transmission housing (1) is hinged with a steering arm (8), and the steering arm (8) is provided with an abutment part (81), which is used to abut against the outer end of the drive rod (5).

7. The agricultural machinery steering shifting device according to claim 6, characterized in that, The steering arm (8) is provided with a rotating shaft (82), the transmission housing (1) is equipped with a rotating support plate (1301), the two ends of the rotating shaft (82) are rotatably connected to the transmission housing (1) and the rotating support plate (1301) respectively, and the abutment part (81) is provided on the rotating shaft (82).

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