Electric control shifting fork gear shifting device of agricultural gearbox

Abstract

An electric control shifting fork gear shifting device of an agricultural gearbox comprises a motor, an arm plate, an auxiliary gear shifting assembly and a shifting fork shaft assembly, an output shaft of the motor is fixedly connected to one end of the arm plate in a sleeved mode, the other end of the arm plate is hinged to one end of the auxiliary gear shifting assembly, and the auxiliary gear shifting assembly is fixed to a shell of the gearbox. The other end of the auxiliary gear shifting assembly is hinged to one end of the shifting fork shaft assembly, the other end of the shifting fork shaft assembly penetrates through a mounting hole I in a gearbox shell and is connected to a gear shifting part in a clamped mode, and a limiting structure is arranged on the shifting fork shaft assembly. The gear shifting function position is converted by changing the rotating position of the motor, the process action is smooth and free of impact, the motor and the shifting fork are in transition connection by adding an external auxiliary gear shifting mechanism, the structure is simple, the lever principle is adopted, the requirement for the torque of the motor is small, and the cost is low. The acting force on the shifting fork is stable, and the direction of the acting force on the shifting fork is consistent with that of the shifting fork shaft.

Description

TECHNICAL FIELD

[0001] The utility model relates to agricultural machinery technical field, concretely relates to a kind of electric control shift fork gear shifting device of agricultural gearbox. BACKGROUND

[0002] The agricultural gearbox shift fork gear shifting device is a key component in agricultural machinery, which is used to switch different gears of the working machine, control the gear meshing inside the gearbox, and thus realize different transmission ratios and mechanical speed changes to adapt to different agricultural working speeds and torque requirements. The gearbox commonly used in agricultural machinery on the market adopts mechanical transmission, and the hand lever type gear shifting needs the operator to operate the clutch structure and manually shift gears at the same time, which undoubtedly increases the operation difficulty, especially in the field that needs to frequently turn around and shift gears, it is time-consuming and laborious, and brings inconvenience to operation.

[0003] Overall, mechanical transmission has the defects that the action is easily affected by impact load and the action position is not accurate enough in the gear shifting control process, which further affects gear shifting transmission. With the development of intelligent technology for agricultural machinery, the future electric control shift fork gear shifting device of agricultural gearbox may integrate various intelligent sensors and control technologies to realize more accurate gear shifting control and fault diagnosis, and provide support for the development of intelligent agricultural machinery. The present application realizes the gear shifting structure of electric control mode through electrical control improvement based on existing mechanical transmission, to meet the design requirements of future unmanned and intelligent driving. SUMMARY

[0004] The utility model aims at at least one of the technical problems existing in prior art. To this end, the purpose of the utility model is to provide an electric control shift fork gear shifting device of agricultural gearbox, to solve the problem that the original mechanical transmission mode in agricultural machinery makes the action easily affected by impact load and the action position not accurate enough, which further affects gear shifting transmission.

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

[0006] An electric control shift fork gear shifting device of agricultural gearbox comprises a motor, an arm plate, an auxiliary gear shifting component and a shift fork shaft component. The output shaft of the motor is fixedly sleeved at one end of the arm plate. The other end of the arm plate is hingedly connected to one end of the auxiliary gear shifting component. The auxiliary gear shifting component is fixed to the housing of the gearbox. The other end of the auxiliary gear shifting component is hingedly connected to one end of the shift fork shaft component. The other end of the shift fork shaft component passes through the mounting hole on the gearbox housing

[0007] I, and is clamped at the gear shifting position. Limiting structure is arranged on the shift fork shaft component.

[0008] Preferably, the auxiliary gear shifting assembly comprises a mounting seat, a long shaft arm, a short shaft arm and two short connecting rod arm plates, mounting lugs of the mounting seat are fixed on the housing of the gearbox through bolts and elastic washers, a long shaft of the long shaft arm is rotatably sleeved on the inner wall of the shaft sleeve of the mounting seat through two radial rotating shaft sleeves and is axially fixed through washers and shaft retaining rings, two holes are formed in the branch of the long shaft arm, the hole close to the long shaft is mounted on one end of the two short connecting rod arm plates through a pin shaft and is fixed through an open pin passing through a pin hole on the pin shaft, the other end of the two short connecting rod arm plates is hingedly connected to the shift fork shaft assembly, the hole away from the long shaft is rotatably connected to the short shaft of the short shaft arm, and the other end of the short shaft arm is hingedly connected to the other end of the arm plate.

[0009] Preferably, the shift fork shaft assembly comprises a sleeve seat, a shift fork shaft and a shift fork plate, the sleeve seat comprises an integrally formed shaft sleeve part, a limiting column and a triangular lug, the shift fork shaft passes through the shaft sleeve part in an axial direction, a plurality of limiting grooves are arranged on the shift fork shaft, the limiting column is provided with an internal threaded cavity, a limiting steel ball, a compression spring, a sealing washer and a flange bolt are sequentially mounted, the limiting steel ball abuts against the limiting groove, the other end of the two short connecting rod arm plates is hingedly connected to a pin hole of one end of the shift fork shaft, the other end of the shift fork shaft is sleeved into the interface of the shift fork plate, a screw hole is arranged on the shift fork plate and is aligned with a screw hole on the shift fork plate, and the shift fork plate is fixedly installed through a bolt, the shift fork of the shift fork plate is clamped at a gear shifting position, and the triangular lug is fixed to the periphery of the mounting hole I on the gearbox housing.

[0010] Preferably, an oil seal hole is formed in one end of the shaft sleeve part close to the short connecting rod arm plate, a skeleton oil seal is arranged in the oil seal hole, and an axial limiting is performed through a hole retaining ring, and O-rings are arranged at the connection between the other end of the shaft sleeve part and the shift fork shaft and the connection between the other end of the shaft sleeve part and the mounting hole I.

[0011] Preferably, the number of limiting grooves is three, and the initial position of the limiting steel ball abuts against the middle limiting groove.

[0012] Preferably, the motor is a brushless direct current motor.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] 1. The utility model adopts an electric control structure to replace the original mechanical structure, realizes the conversion of gear shifting function positions through the change of the rotating position of the motor, the process is smooth and has no impact, an external auxiliary gear shifting mechanism is added to transitionally connect the motor and the shift fork, the structure is simple, the lever principle is adopted, the torque demand of the motor is small, the force acting on the shift fork is stable, the direction of the force acting on the shift fork is consistent with the shift fork shaft and the like.

[0015] 2. The motor adopted by the utility model is provided with an angle sensor and a potential sensor and has a position feedback function, the motor can be controlled to rotate to a position corresponding to a gear position through the position feedback function, and the gear shifting position is accurately controlled.

[0016] The rotation range of 180° can be set to stop at any angle, and has the characteristics of high position accuracy. The overall design is simple, and the original mechanical gear shifting structure is less changed, and has the characteristics of low cost, good economy and strong practicability. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.

[0018] Figure 1 It is a structural schematic view of the utility model agricultural gearbox electric control shift fork shifting device;

[0019] Figure 2 It is a structural schematic view of the utility model arm plate although motor output shaft rotates to different positions (wherein a is initial position, b is intermediate position, and c is terminal position);

[0020] Figure 3 It is a structural schematic view of the utility model auxiliary shifting assembly;

[0021] Figure 4 It is a sectional view of the utility model auxiliary shifting assembly from another perspective;

[0022] Figure 5 It is an explosion view of the utility model auxiliary shifting assembly;

[0023] Figure 6 It is a three-dimensional structural schematic view of the utility model shift fork shaft assembly;

[0024] Figure 7 It is an explosion view of the utility model shift fork shaft assembly;

[0025] Figure 8 It is a sectional view of the utility model shift fork shaft assembly.

[0026] Among them, motor 1, arm plate 2, auxiliary shifting assembly 3, mounting seat 301, long shaft arm 302, short shaft arm 303, short connecting rod arm plate 304, shift fork shaft assembly 4, sleeve 401, shaft sleeve 40101, limit column 40102, triangular ear 40103, shift fork shaft 402, limit groove 40201, shift fork plate 403, interface 40301, shift fork 40302, radial rotation shaft sleeve 5, shaft check ring 6, pin shaft 7, cotter pin 8, limit steel ball 9, compression spring 10, sealing washer 11, flange bolt 12, oil seal hole 13, skeleton oil seal 14, hole check ring 15, O-ring 16. DETAILED DESCRIPTION

[0027] In order to make the personnel in the technical field better understand the scheme of the present application, the technical scheme in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor should belong to the protection scope of the present application.

[0028] The technical scheme of the present application will be further described below in combination with the drawings. Figures 1-8 The utility model discloses an agricultural gearbox electric control shift fork shifting device, including motor 1, arm plate 2, auxiliary shifting assembly 3 and shift fork shaft assembly 4, the output shaft fixed sleeve of motor 1 is in one end of arm plate 2, the other end of arm plate 2 is hinged in one end of auxiliary shifting assembly 3, and auxiliary shifting assembly 3 is fixed on the casing of gearbox, and the other end of auxiliary shifting assembly 3 is hinged in one end of shift fork shaft assembly 4, and the other end of shift fork shaft assembly 4 passes through the mounting hole I on the casing of gearbox and is clamped in the shift position, and limit structure is arranged on shift fork shaft assembly 4.

[0029] Auxiliary shifting assembly 3 is fixed on the casing of gearbox, and the utility model discloses a feature that the small arm of the auxiliary shifting assembly 3 is connected to the shift fork shaft assembly 4, and the swing arm of the auxiliary shifting assembly 3 is connected to the biasing pin shaft on the arm plate 2, so that the impact load of the auxiliary shifting assembly 3 during the swing process is avoided during the rotation of the output shaft of the motor 1. As an embodiment of the utility model, Figures 3-5 Auxiliary shifting assembly 3 includes mounting seat 301, long shaft arm 302, short shaft arm 303 and two short connecting rod arm plates 304, mounting lug 30101 of mounting seat 301 is fixed on the casing of gearbox through bolts and elastic washers, long shaft 30201 of long shaft arm 302 is rotatably connected to the inner wall of shaft sleeve 30102 of mounting seat 301 through two radial rotating shaft sleeves 5, and is axially fixed by washers and shaft retaining rings 6, two holes are formed in the supporting arm of long shaft arm 302, one hole near long shaft 30201 is installed on one end of two short connecting rod arm plates 304 through a pin shaft 7, and is fixed by an open pin 8 passing through the pin hole of the pin shaft 7, the other end of the two short connecting rod arm plates 304 is hinged to the shift fork shaft assembly 4, and the other hole away from long shaft 30201 is rotatably connected to short shaft 30301 of short shaft arm 303, and the other end of short shaft arm 303 is hinged to the other end of arm plate 2.

[0030] As Figure 6 and Figure 7, the shift fork shaft assembly 4 includes a sleeve 401, a shift fork shaft 402 and a shift fork plate 403, the sleeve 401 includes an integral shaft sleeve part 40101, a limiting column 40102 and a triangular ear 40103, the shift fork shaft 402 axially passes through the shaft sleeve part 40101, the shift fork shaft 402 is provided with a plurality of limiting grooves 40201, the limiting column 40102 is provided with an internal threaded cavity, and a limiting steel ball 9, a compression spring 10, a sealing washer 11 and a flange bolt 12 are sequentially installed, the limiting steel ball 9 abuts on the limiting groove 40201, the other end of the two short connecting rod arm plates 304 is hinged to one end pin hole of the shift fork shaft 402, the other end of the shift fork shaft 402 is sleeved into the interface 40301 of the shift fork plate 403, a screw hole is arranged on the shift fork plate 403 and is aligned with the screw hole on the shift fork plate 403, and the shift fork plate 403 is fixed by being installed through a bolt, the shift fork 40302 of the shift fork plate 403 is clamped at a shift position, and the triangular ear 40103 is fixed to the periphery of the mounting hole I on the gearbox shell.

[0031] As Figure 8 , the shaft sleeve part 40101 is provided with an oil seal hole 13 close to one end of the short connecting rod arm plate 304, a skeleton oil seal 14 is arranged in the oil seal hole 13, and an axial limiting is performed on the hole by a check ring 15; the other end of the shaft sleeve part 40101 is sealed by an O-shaped ring 16 at the connection position of the shaft sleeve part 40101 and the shift fork shaft 402 and at the connection position of the shaft sleeve part 40101 and the mounting hole I. The number of the limiting grooves 40201 is three, and the initial position of the limiting steel ball 9 abuts on the middle limiting groove 40201.

[0032] The motor 1 is designed as a brushless DC motor, because the rotating action 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 and the like. The brushless DC motor and the arm plate on the output shaft thereof are action execution components, and a certain angle of rotation will cause displacement change, and Figure 2 The main action positions are the initial position a and the terminal position b, and the intermediate position c is a floating position adjusted according to actual working conditions and set by a controller connected with the motor in a wire harness, and the application needs to be matched and adjusted according to the limiting function of the shift fork shaft assembly 4, and the controller is a control component with CAN communication function, and forms a control logic of a two-way channel with a button switch box.

[0033] Working principle of the utility model:

[0034] When the external power is turned on, the output shaft of the motor 1 starts to rotate through the button switch and the controller, and drives the arm plate 2 to rotate around the axis of the output shaft, so that the free end of the arm plate 2 moves from the initial position a to the terminal position b, drives the short shaft arm 303 to rotate, and in turn drives the long shaft arm 302 and the two short connecting rod arm plates 304 to rotate, and the process is smooth, so that the short connecting rod arm plates 304 drive the shift fork shaft 402 to slide axially, the shift fork plate 403 slides axially, and the shift fork 40302 on the shift fork plate 403 is clamped at the shift position, so that the shift fork 40302 stably drives the shift position to axially displace, and finally realizes gear shifting.

[0035] Similarly, when the rotating position of the arm plate 2 starts to return from the terminal position b to the initial position a, the short shaft arm 303, the long shaft arm 302 and the short connecting rod arm plate 304 are sequentially driven, the process is smooth, the shift fork shaft 402 is axially slid to the reset position, and the shift fork plate 403, the shift fork 40302 and the shift position are returned.

[0036] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, and any modification, equivalent replacement and improvement within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An electrically controlled shift fork shifting device for an agricultural transmission, characterized by: The utility model relates to a kind of auxiliary gear shifting components, including motor (1), arm plate (2), auxiliary gear shifting component (3) and shift fork shaft component (4), the output shaft of the motor (1) is fixedly sleeved in one end of arm plate (2), the other end of the arm plate (2) is hinged in one end of auxiliary gear shifting component (3), the auxiliary gear shifting component (3) is fixed on the shell of gearbox, the other end of the auxiliary gear shifting component (3) is hinged in one end of shift fork shaft component (4), the other end of the shift fork shaft component (4) passes through mounting hole I on the shell of gearbox, and is clamped in gear shifting position, limit structure is equipped on the shift fork shaft component (4).

2. The electrically controlled shift fork shifting device for an agricultural transmission according to claim 1, characterized in that: The auxiliary gear shifting component (3) includes mounting seat (301), long shaft arm (302), short shaft arm (303) and two short connecting rod arm plates (304), the mounting lug (30101) of the mounting seat (301) is fixed on the shell of gearbox by bolt and elastic washer, the long shaft (30201) of the long shaft arm (302) is rotatably sleeved on the inner wall of the shaft sleeve (30102) of the mounting seat (301) by two radial rotation shaft sleeves (5), and is axially fixed by washer and shaft washer (6), two holes are formed in the branch of the long shaft arm (302), wherein the hole close to the long shaft (30201) is mounted on one end of the two short connecting rod arm plates (304) by pin shaft (7), and is fixed by open pin (8) passing through the pin hole on the pin shaft (7), the other end of the two short connecting rod arm plates (304) is hinged to the shift fork shaft component (4), wherein the hole away from the long shaft (30201) is rotatably connected to the short shaft (30301) of the short shaft arm (303), and the other end of the short shaft arm (303) is hinged to the other end of the arm plate (2).

3. The electrically controlled shift fork shifting device for an agricultural transmission according to claim 2, characterized in that: The shift fork shaft component (4) includes sleeve seat (401), shift fork shaft (402) and shift fork plate (403), the sleeve seat (401) includes integrally-formed shaft sleeve part (40101), limiting column (40102) and triangular lug (40103), the shift fork shaft (402) passes through the shaft sleeve part (40101) axially, the shift fork shaft (402) is provided with a plurality of limiting grooves (40201), the limiting column (40102) is provided with an internal threaded cavity, and limiting steel ball (9), compression spring (10), sealing washer (11) and flange bolt (12) are sequentially mounted, the limiting steel ball (9) abuts on the limiting groove (40201), the other end of the two short connecting rod arm plates (304) is hinged to one end pin hole of the shift fork shaft (402), the other end of the shift fork shaft (402) is sleeved into the interface (40301) of the shift fork plate (403), which is provided with screw hole and screw hole on the shift fork plate (403) alignment, and is fixed by bolt installation, the shift fork (40302) of the shift fork plate (403) is clamped in gear shifting position, and the triangular lug (40103) is fixed on the periphery of mounting hole I on the shell of gearbox.

4. The electrically controlled shift fork shifting device for an agricultural transmission of claim 3, wherein: The shaft sleeve part (40101) is provided with an oil seal hole (13) near one end of the short connecting rod arm plate (304), a skeleton oil seal (14) is arranged in the oil seal hole (13), and an axial position limiting is performed on the hole by a hole stop ring (15); the other end of the shaft sleeve part (40101) is sealed by an O-shaped ring (16) at the connection with the shift fork shaft (402) and at the connection with the mounting hole I.

5. An electrically controlled shift fork shifting device for an agricultural gearbox according to claim 3 or 4, characterized in that: The number of the limiting grooves (40201) is three, and the initial position of the limiting steel ball (9) is abutted on the middle limiting groove (40201).

6. The electrically controlled shift fork shifting device for an agricultural transmission of claim 1, wherein: The motor (1) is a brushless direct current motor.

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