Electric control clutch device of agricultural gearbox

Abstract

An electric control clutch device of an agricultural gearbox comprises a motor, an arm plate, a stay wire, a swing mechanism, a shifting fork, a clutch release bearing and a bearing seat, the middle of the swing mechanism is fixed to a machine body, a part of the swing mechanism is in ball joint with the bottom of the shifting fork, the middle of the shifting fork is in ball joint with the machine body, and the top of the shifting fork is of a U-shaped fork structure. The clutch release bearing is fixed to one end of the bearing seat, a through hole is further formed in the other end of the bearing seat in the circumferential direction, a return spring is connected to the through hole in a hanging mode, and the return spring is fixed to a machine body through a pin. According to the utility model, the conversion of two functional positions of separation and reunion is realized by controlling the rotating position of the output shaft on the motor, the action is smooth and impact-free in the process, the change of a mechanical separation and reunion structure is less, and an electric control structure is adopted to replace an original mechanical structure, so that a mode is provided for intelligent control.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery, in particular to an electronically controlled clutch device of an agricultural gearbox. Background Art

[0002] Agricultural gearboxes are an important component of agricultural machinery. They are mainly responsible for effectively transmitting the power generated by the engine to the working parts of agricultural machinery and adjusting the speed and torque according to different working conditions. However, the combination of gearboxes and engines commonly used in agricultural machinery on the market is generally direct connection or belt connection. The power clutch method mostly adopts a mechanical structure, which is not in line with the future trend of intelligent driving and unmanned driving.

[0003] As a key technology in modern agricultural transmissions, electronically controlled clutches make clutch operation more automated and precise, significantly improving the efficiency and quality of agricultural operations. This new system improves upon existing mechanical clutches by electronically controlling them, achieving an electronically controlled clutch structure that meets the design requirements of future unmanned and intelligent driving systems, while also enabling intelligent control. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the purpose of the present invention is to provide an electronically controlled clutch device for an agricultural gearbox, which solves the technical problem of realizing intelligent control functions based on the existing mechanical clutch structure.

[0005] The utility model is realized through the following technical solutions:

[0006] An electronically controlled clutch device for an agricultural gearbox comprises a motor, an arm plate, a cable, a swing mechanism, a shift fork, a clutch release bearing and a bearing seat, wherein the output shaft of the motor is fixedly sleeved on one end of the arm plate, the other end of the arm plate is hinged to one end of the cable, the other end of the cable is hinged to the swing mechanism, the middle part of the swing mechanism is fixed to the machine body, a part of the swing mechanism is ball-connected to the bottom of the shift fork, the middle part of the shift fork is ball-connected to the machine body, the top of the shift fork is a U-shaped fork structure, and is clamped on the bearing seat, the bearing seat is slidably sleeved on the shaft, the clutch release bearing is fixed on one end of the bearing seat, and a through hole is also opened in the circumference of the other end of the bearing seat, on which a return spring is hung, and the return spring is fixed to the machine body by a pin.

[0007] Preferably, the swing mechanism includes an axle seat, a swing arm, a connecting fork and a push rod, the swing arm includes an integrally formed horizontal support arm, a sleeve and a vertical support arm, the axle seat is fixed on the machine body, the sleeve is rotatably installed on the axle seat, and is axially limited by a washer I and a shaft retaining ring, the other end of the pull wire is hinged to the horizontal support arm, the vertical support arm is hinged between the fork arms of the connecting fork, and is axially limited by a pin shaft, a washer II and a cotter pin, the fork root of the connecting fork is screwed to one end of the push rod and locked by a nut, and the other end of the push rod is spherically connected to the inner spherical riveted seat at the bottom of the fork.

[0008] More preferably, the main body of the pull wire is a steel wire rope with a sheath, and both ends of the wire rope are constructed as riveted joints with pin hole structures, and are respectively hinged to the horizontal support arm and the other end of the arm plate through pins.

[0009] Preferably, a hemispherical recess is provided in the middle of the fork, and two mounting holes are reserved, and an elastic limiting plate is riveted thereon by rivets. The hemispherical recess is cooperated with the ball head of the ball head fixing seat, and the elastic limiting plate is constructed as a U-shaped bending structure to limit the ball head of the ball head fixing seat. The ball head fixing seat is installed on the fixed position of the body by means of spring washers and bolts to form a lever fulcrum.

[0010] Preferably, a pair of symmetrical bosses are provided on the circumference of the other end of the bearing seat, and the U-shaped fork structure is arranged in cooperation with the bosses.

[0011] Preferably, an oil nozzle mounting hole is opened on the circumference of the bearing seat, and an oil nozzle is plugged into it.

[0012] Preferably, the motor is a brushless DC motor.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] The utility model realizes the conversion between the clutch and engagement functional positions by controlling the rotational position of the output shaft on the motor. An arm plate, a cable, a swing mechanism, a shift fork, a clutch release bearing and a bearing seat are arranged between the output shaft of the motor and the clutch assembly, and transmission is carried out successively. The whole process is smooth and impact-free. By adopting an electronically controlled structure to replace the original mechanical structure, a method for intelligent control is provided. The design structure is simple, and the modification of the mechanical clutch structure is relatively small. It has the characteristics of low cost, good economy and strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 This is a structural diagram of the electronically controlled clutch device of the agricultural gearbox of the utility model installed on the machine body (where a and b represent the arm plate being located in the initial position and the end position respectively);

[0017] Figure 2 This is a schematic top view of the structure of the electronically controlled clutch device of the agricultural gearbox of the present invention;

[0018] Figure 3 Schematic diagram of the structure of the arm plate of the utility model in the initial position a, the middle position c, and the final position b respectively;

[0019] Figure 4 This is a schematic diagram of the structure of the pull wire of the utility model;

[0020] Figure 5 This is a three-dimensional exploded view of the swing mechanism of the utility model;

[0021] Figure 6 Schematic diagram of the forward structure of the swing mechanism of the utility model (where d represents the deviation of its radial swing position);

[0022] Figure 7 This is a schematic diagram of the three-dimensional structure of the shift fork of the utility model;

[0023] Figure 8 This is a schematic diagram of the structure of the utility model in which the shift fork is connected to the machine body;

[0024] Figure 9 This is a schematic structural diagram of the clutch release bearing and bearing seat of the utility model;

[0025] Figure 10 for Figure 9 Schematic diagram of the top view structure.

[0026] Among them, the motor 1, the arm plate 2, the pull wire 3, the riveted joint 301, the swing mechanism 4, the shaft seat 401, the swing arm 402, the horizontal support arm 40201, the sleeve 40202, the vertical support arm 40203, the connecting fork 403, the fork arm 40301, the fork root 40302, the push rod 404, the shift fork 5, the inner spherical riveted seat 501, the clutch release bearing 6, the bearing seat 7, the through hole 701, the boss 702, the return spring 8, the shaft retaining ring 9, the pin 10, the cotter pin 11, the nut 12, the ball head fixing seat 13, the rivet 14, the elastic limit plate 15, the spring washer 16, the bolt 17, the oil nozzle 18, the shaft 19, the claw spring 20, and the clutch 21. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0028] The technical solution of the present utility model is further described below with reference to the accompanying drawings. Figure 1-10 The figure shows an electric clutch device for an agricultural gearbox, comprising a motor 1, an arm plate 2, a cable 3, a swing mechanism 4, a shift fork 5, a clutch release bearing 6 and a bearing seat 7. Figure 1 , motor 1 serves as the electronically controlled drive part, and its control action execution unit adopts a distributed layout. It can be directly connected in parallel to the electrical wiring harness of the whole machine through the electrical wiring harness. The output shaft of motor 1 is fixedly sleeved on one end of the arm plate 2, and the other end of the arm plate 2 is hinged to one end of the pull wire 3, and the other end of the pull wire 3 is hinged to the swing mechanism 4. The middle part of the swing mechanism 4 is fixed to the machine body, a part of the swing mechanism 4 is ball-connected to the bottom of the fork 5, the middle part of the fork 5 is ball-connected to the machine body, and the top of the fork 5 is a U-shaped fork structure, and is clamped on the bearing seat 7. The bearing seat 7 is slidably sleeved on the shaft 19, and the clutch release bearing 6 is fixed on one end of the bearing seat 7. A through hole 701 is also opened on the circumference of the other end of the bearing seat 7, and a return spring 8 is hung on it, and the return spring 8 is fixed to the machine body by a pin. When the rotation position of the aforementioned arm plate 2 moves from the initial position a to the end position b, the clutch release bearing 6 moves Figure 2 The clutch 21 is disengaged by pressing the claw spring 20 (or diaphragm spring) against the clutch release bearing 6. At the same time, the claw spring 20 exerts a reverse thrust on the clutch release bearing 6. When the rotation position of the arm plate 2 starts to return from the end position b to the initial position a, the clutch release bearing 6 moves to the left side of the clutch 21 under the combined force of the claw spring 20 and the return spring 8. Figure 2 The clutch release bearing 6 is returned to its original starting position by translating back to the right side. The transition between the clutch and engagement positions is achieved by changing the rotational position of the output shaft on the motor 1. The process is smooth and impact-free. By replacing the original mechanical structure with an electronically controlled structure, a method for intelligent control is provided.

[0029] As an embodiment of the present invention, Figure 5 and Figure 6The swing mechanism 4 includes an axle seat 401, a swing arm 402, a connecting fork 403 and a top rod 404. The swing arm 402 includes an integrally formed horizontal support arm 40201, a sleeve 40202 and a vertical support arm 40203. The axle seat 401 is fixed to the machine body. The sleeve 40202 is rotatably mounted on the axle seat 401 and is axially limited by a washer 1 and a shaft retaining ring 9. The other end of the pull wire 3 is hinged to the horizontal support arm 40201. The connecting fork 403 includes an integrally formed fork arm 40301 and a fork root 40302. The fork arm 40301 and the vertical support arm 40203 are connected. Pin holes are staggered between the support arms 40203 to allow the vertical support arms 40203 to be hinged between the fork arms 40301, and axially limited by the pin shaft 10, washer II and cotter pin 11. The fork root 40302 is screwed to one end of the top rod 404, and after adjusting the appropriate length, it is locked by the nut 12. The other end of the top rod 404 is spherically connected to the inner spherical riveted seat 501 at the bottom of the fork 5. Since complete limitation is not performed, the influence of the radial displacement d of the connecting fork 403 on the fork 5 during the swinging process is eliminated.

[0030] As another embodiment of the present invention, in order to make the transmission of the cable 3 more stable, Figure 4 The main body of the cable 3 is a steel wire rope with a sheath. Both ends of the cable are constructed with rivet joints 301 with pinhole structures. They are respectively hinged to the cross arm 40201 and the other end of the arm plate 2 via pins. The cable 3 only transmits force in the tensile direction. When the output shaft of the motor 1 rotates, the motor 1 gradually overcomes the reset force of the clutch 21 to achieve separation. When the output shaft of the motor 1 rotates in the opposite direction, the force acting on the cable 3 is smoothly dragged, and the reset force of the clutch 21 is used to drag and transmit the force, avoiding the impact and instability caused by the rigid connection.

[0031] As another embodiment of the present invention, Figure 7 and Figure 8 A hemispherical recess 502 is provided in the middle of the shift fork 5, and two mounting holes are reserved. An elastic limiting plate 15 is riveted with rivets 14. The hemispherical recess 502 is matched with the ball head of the ball head fixing seat 13. The elastic limiting plate 15 is constructed as a U-shaped bending structure to limit the ball head of the ball head fixing seat 13 to prevent the ball head fixing seat 13 from separating from the shift fork 5 during the lever action. The ball head fixing seat 13 is installed in a fixed position of the body through a spring washer 16 and a bolt 17 to form a lever fulcrum, thereby giving the shift fork 5 a swing function.

[0032] As another embodiment of the present invention, a pair of symmetrical bosses 702 are provided in the circumferential direction of the other end of the bearing seat 7. The U-shaped fork structure at the top of the shift fork 5 is arranged in a planar fit with the boss 702, which limits some of its degrees of freedom and ensures that the lever action of the shift fork 5 is limited to the axial direction of the clutch release bearing 6.

[0033] As another embodiment of the present invention, Figure 9 An oil nozzle mounting hole is opened on the circumference of the bearing seat 7, and an oil nozzle 18 is plugged into it, which is used to inject lubricating grease to reduce the friction resistance of the bearing seat 7 during the sliding process on the shaft 19.

[0034] Motor 1 is designed as a brushless DC motor because the rotation process of the brushless DC motor is smooth and impact-free, and the brushless DC motor has the characteristics of forward and reverse rotation, large torque, overload protection, etc. The brushless DC motor and the arm plate on the output shaft are the action execution components. Rotating a certain angle will produce displacement changes, such as Figure 3 The main action positions are the starting position a and the ending position b, and the middle position c is a floating position set by the controller and adjusted according to the actual working conditions. Figure 1 The driver component (left 1) in the upper right corner controls and drives the motor, providing power amplification. The controller component (right 1) features CAN communication, forming a bidirectional control logic channel with the pushbutton switch box. The electronic control system utilizes pushbutton switches and controllers via CAN communication, resulting in low response delay, low current consumption, and low energy consumption.

[0035] The working principle of this utility model:

[0036] like Figure 1 、 Figure 2 and Figure 5 , turn on the external power supply, through the button switch and controller, the output shaft of the motor 1 starts to rotate, driving the arm plate 2 to rotate around the axis of the output shaft, so that the free end of the arm plate 2, its rotation position moves from the initial position a to the end position b, driving the pull wire 3 to move the horizontal support arm 40201 in the swing mechanism 4 to rise, the sleeve 40202 rotates on the shaft seat 401, and the vertical support arm 40203 rotates around the center of the sleeve 40202, successively driving the connecting fork 403, the top rod 404, and the shift fork 5 to move, and the shift fork 5 drives the bearing seat 7 to move. Figure 2 The clutch release bearing 6 moves to the left until it is pressed on the claw spring 20 (or diaphragm spring) to push the clutch 21 to separate. At the same time, the claw spring 20 forms a reverse thrust on the clutch release bearing 6.

[0037] Similarly, when the rotation position of the arm plate 2 begins to return from the end position b and move toward the initial position a, the clutch release bearing 6 is translated to the right under the combined force of the claw spring 20 of the clutch 21 and the return spring 8, pulling the clutch release bearing 6 back to its original starting position.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An electronically controlled clutch device for an agricultural gearbox, characterized in that: The invention comprises a motor (1), an arm plate (2), a cable (3), a swing mechanism (4), a shift fork (5), a clutch release bearing (6) and a bearing seat (7); the output shaft of the motor (1) is fixedly sleeved on one end of the arm plate (2); the other end of the arm plate (2) is hinged to one end of the cable (3); the other end of the cable (3) is hinged to the swing mechanism (4); the middle part of the swing mechanism (4) is fixed to the machine body; a part of the swing mechanism (4) is ball-connected to the shift fork The bottom of the fork (5), the middle of the fork (5) is spherically connected to the machine body, the top of the fork (5) is a U-shaped fork structure and is clamped on the bearing seat (7), the bearing seat (7) is slidably sleeved on the shaft (19), the clutch release bearing (6) is fixed on one end of the bearing seat (7), and the other end of the bearing seat (7) is also provided with a through hole (701) in the circumferential direction, on which a return spring (8) is hung, and the return spring (8) is fixed to the machine body through a pin.

2. The electronically controlled clutch device for an agricultural gearbox according to claim 1, characterized in that: The swing mechanism (4) includes an axle seat (401), a swing arm (402), a connecting fork (403) and a top rod (404); the swing arm (402) includes an integrally formed horizontal support arm (40201), a sleeve (40202) and a vertical support arm (40203); the axle seat (401) is fixed to the machine body; the sleeve (40202) is rotatably mounted on the axle seat (401) and is axially limited by a washer I and a shaft retaining ring (9); the other end of the pull wire (3) The vertical arm (40203) is hinged on the horizontal arm (40201), and the vertical arm (40203) is hinged between the fork arms (40301) of the connecting fork (403), and is axially limited by a pin (10), a washer II and a cotter pin (11). The fork root (40302) of the connecting fork (403) is screwed to one end of the top rod (404) and locked by a nut (12). The other end of the top rod (404) is spherically connected to the inner spherical riveted seat (501) at the bottom of the shift fork (5).

3. The electronically controlled clutch device for an agricultural gearbox according to claim 2, characterized in that: The main body of the pull wire (3) is a steel wire rope with a sheath, and both ends of the pull wire are constructed as riveted joints (301) with pin hole structures, and are respectively hinged to the horizontal support arm (40201) and the other end of the arm plate (2) through pins.

4. The electronically controlled clutch device for an agricultural gearbox according to claim 1, characterized in that: A hemispherical recess (502) is provided in the middle of the shift fork (5), and two mounting holes are reserved. An elastic limiting plate (15) is riveted to the shift fork (5) through a rivet (14). The hemispherical recess (502) is matched with the ball head of the ball head fixing seat (13). The elastic limiting plate (15) is constructed as a U-shaped bending structure to limit the ball head of the ball head fixing seat (13). The ball head fixing seat (13) is installed on a fixed position of the machine body through a spring washer (16) and a bolt (17) to form a lever fulcrum.

5. The electronically controlled clutch device for an agricultural gearbox according to claim 1, characterized in that: A pair of symmetrical bosses (702) are provided on the circumference of the other end of the bearing seat (7), and the U-shaped fork structure is arranged in coordination with the bosses (702).

6. The electronically controlled clutch device for an agricultural gearbox according to claim 1 or 5, characterized in that: An oil nozzle mounting hole is provided on the circumference of the bearing seat (7), and an oil nozzle (18) is inserted therein.

7. The electronically controlled clutch device for an agricultural gearbox according to claim 1, characterized in that: The motor (1) is a brushless DC motor.

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