Auxiliary variable speed control mechanism of tractor

Abstract

The utility model discloses a tractor auxiliary variable speed control mechanism which comprises a handle, a transmission mechanism and an executing mechanism, the transmission mechanism is used for transmitting force borne by the handle to the executing mechanism, and the transmission mechanism comprises a supporting shaft, a shaft sleeve, a connecting sleeve, a first rocker arm, a second rocker arm, a third rocker arm and a gear shifting shaft. The other end of the supporting shaft is fixedly connected with the connecting sleeve, the supporting shaft is installed in the shaft sleeve, the two ends of the supporting shaft extend out, the shaft sleeve is installed on the side face of a fender on the side of a seat, the outer side wall of the connecting sleeve is fixedly connected with one end of the first rocker arm, the other end of the first rocker arm is hinged to one end of the second rocker arm, and the other end of the second rocker arm is hinged to the third rocker arm. The third rocker arm is fixedly connected with one end of a gear shifting shaft, the other end of the gear shifting shaft is fixedly connected with an auxiliary speed change control shifting block through an elastic pin, the other end of the auxiliary speed change control shifting block is connected into a shifting fork shaft groove, and the shifting fork shaft is connected with an internal gear engaging mechanism.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tractor auxiliary speed change control mechanism. BACKGROUND

[0002] The tractor auxiliary speed change control lever is an important component connecting the tractor speed change system and the driver's operation, and its main function is to adjust the driving speed of the tractor, and the power output demand under different working conditions is realized by changing the transmission ratio. The auxiliary speed change control lever transmits the operation instruction of the driver to the inside of the gearbox by a mechanical mode to change the meshing state of the main and auxiliary speed change gears of the tractor, and the speed change is realized.

[0003] The traditional tractor auxiliary speed change control lever is usually installed in front of or on the side of the driver's seat, but such design often limits the leg space of the driver, and fatigue is easily caused in the long-time driving process. In addition, the installation position of the traditional control lever may also affect the driver's sight and operation efficiency. Therefore, it is necessary to optimize the installation position of the auxiliary speed change operating lever. INVENTION CONTENTS

[0004] The utility model aims at solving above prior art's insufficient, provides a tractor auxiliary speed change control mechanism.

[0005] A tractor auxiliary speed change control mechanism, including handle, transmission mechanism, actuating mechanism, transmission mechanism is used for transmitting the force that handle received to actuating mechanism, transmission mechanism includes support shaft, axle sleeve, connecting sleeve, first rocker arm, second rocker arm, third rocker arm, shift shaft,

[0006] One end of support shaft is fixedly connected with handle, and the other end of support shaft is fixedly connected with connecting sleeve, support shaft is installed in axle sleeve, and both ends are stretched out, axle sleeve is installed on the side of the fender on the side of the seat, the outer side wall of connecting sleeve is fixedly connected with one end of first rocker arm, the other end of first rocker arm is hingedly connected with one end of second rocker arm, the other end of second rocker arm is hingedly connected with third rocker arm, one end of third rocker arm is fixedly connected with shift shaft, the other end of shift shaft is fixedly connected with auxiliary speed change control knob through elastic pin, the other end of auxiliary speed change control knob is connected in the yoke shaft slot, and the yoke shaft is connected with the inside hanging gear mechanism.

[0007] Further, the second rocker arm is Z-shaped structure, and the bending part is provided with a rounded corner structure.

[0008] Further, the second rocker arm, the first rocker arm and the third rocker arm are hingedly connected through bearings.

[0009] Further, a connecting plate is welded on one end of the shift shaft, and the connecting plate is fixedly connected with one end of the third rocker arm.

[0010] Further, the connecting plate is fixedly connected with one end of the third rocker arm through at least two bolts.

[0011] Further, the third rocker arm is in Z-shaped structure.

[0012] Further, the connecting sleeve is connected with the supporting shaft through bolts.

[0013] Further, the handle is fixedly connected with the supporting shaft through welding.

[0014] Further, the shaft sleeve is fixedly arranged in the mounting hole in the side of the mudguard through welding.

[0015] Further, a bushing is arranged between the supporting shaft and the shaft sleeve.

[0016] Beneficial effects: compared with the prior art, the utility model discloses a part of handle is installed on the side of the mudguard through the transmission mechanism, under the condition of not affecting transmission, increase operating space, thereby increase the operating space of the driver, improve driving comfort. Can effectively reduce the fatigue of the user. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 It is a front view of a tractor auxiliary speed change operating mechanism.

[0018] Fig. 2 It is a side view of a tractor auxiliary speed change operating mechanism.

[0019] In the figure, 1, handle, 2, mudguard, 3, shaft sleeve, 4, bushing, 5, connecting sleeve, 6, supporting shaft, 7, first rocker arm, 8, second rocker arm, 9, third rocker arm, 10, connecting plate, 11, shift shaft, 12, auxiliary speed change operating knob, 13, fork shaft. DETAILED DESCRIPTION

[0020] In order to deepen the understanding of the utility model, the utility model will be further described in the following in conjunction with examples and drawings, and the examples are only used to explain the utility model and do not constitute the limitation to the protection scope of the utility model.

[0021] As shown in Figs. 1-2 Fig. 1, handle, 2, mudguard, 3, shaft sleeve, 4, bushing, 5, connecting sleeve, 6, supporting shaft, 7, first rocker arm, 8, second rocker arm, 9, third rocker arm, 10, connecting plate, 11, shift shaft, 12, auxiliary speed change operating knob, 13, fork shaft.

[0022] A tractor auxiliary speed change operating mechanism, including handle 1, transmission mechanism, actuating mechanism, the transmission mechanism is used for transmitting the force received by handle 1 to the actuating mechanism, the transmission mechanism includes supporting shaft 6, shaft sleeve 3, connecting sleeve 5, first rocker arm 7, second rocker arm 8, third rocker arm 9, shift shaft 11,

[0023] The support shaft 6 is fixedly connected with the handle 1 at one end, and is fixedly connected with the connecting sleeve 5 at the other end. The support shaft 6 is installed in the shaft sleeve 3 and extends at both ends. The shaft sleeve 3 is installed on the side surface of the fender 2 at the side of the seat. The outer side wall of the connecting sleeve 5 is fixedly connected with one end of the first rocker arm 7. The other end of the first rocker arm 7 is hingedly connected with one end of the second rocker arm 8. The other end of the second rocker arm 8 is hingedly connected with the third rocker arm 9. The third rocker arm 9 is fixedly connected with one end of the shift shaft 11. The other end of the shift shaft 11 is fixedly connected with the auxiliary shift operating knob 12 through an elastic pin. The other end of the auxiliary shift operating knob 12 is connected in the groove of the shift fork shaft 13. The shift fork shaft 13 is connected with the internal gear hanging mechanism.

[0024] In the embodiment, the second rocker arm 8 is of Z-shaped structure, and a rounded corner structure is arranged at the bending position.

[0025] In the embodiment, the second rocker arm 8 is hingedly connected with the first rocker arm 7 and the third rocker arm 9 through bearings.

[0026] In the embodiment, the connecting plate 10 is welded on one end of the shift shaft 11. The connecting plate 10 is fixedly connected with one end of the third rocker arm 9.

[0027] In the embodiment, the connecting plate 10 is fixedly connected with one end of the third rocker arm 9 through at least two bolts.

[0028] In the embodiment, the third rocker arm 9 is of Z-shaped structure.

[0029] In the embodiment, the connecting sleeve 5 is fixedly connected with the support shaft 6 through bolts.

[0030] In the embodiment, the handle 1 is fixedly connected with the support shaft 6 through welding.

[0031] In the embodiment, the shaft sleeve 3 is fixedly installed in the mounting hole on the side surface of the fender 2 through welding.

[0032] In the embodiment, a bushing 4 is arranged between the support shaft 6 and the shaft sleeve 3.

[0033] It should be noted that the auxiliary shift handle 1 is the part directly operated by the driver, and is used for transmitting the shift action of the driver.

[0034] The support shaft 6, the handle 1, the first rocker arm 7 and the connecting sleeve 5 are fixedly connected to form an integral whole, which is installed at the corresponding position on the side surface of the fender 2, is used for connecting the key position of the operating handle 1 and the pull rod, and can rotate around the center of the support shaft 6.

[0035] The second rocker arm 8 connects the key components of the operating part and the internal mechanism of the gearbox, and the sub-gear shifting operating rocker arm and the pull rod are connected by a pin and a washer, and the relative positions between the two components are locked.

[0036] The shift shaft, the connecting plate 10 and the third rocker arm 9 are fixed as a whole to transmit the operating action of the driver to the inside of the gearbox. The left fender 2 is also provided with a notch to provide sufficient movement space for the second rocker arm 8.

[0037] Working principle: when it is needed to shift to high gear, the driver pulls the handle forward to drive the supporting shaft, the connecting sleeve, the first rocker arm to rotate counterclockwise around the center of the shaft sleeve fixed on the left fender, drive the second rocker arm to move horizontally, drive the third rocker arm, the connecting plate, the shift shaft and the sub-gear shifting operating handle to rotate clockwise around the center of the shift shaft, thereby drive the shift fork shaft to move forward by a set stroke, and further drive the internal shift mechanism of the gearbox to shift to high gear.

[0038] When it is needed to shift to low gear, the driver pulls the handle backward to drive the operating rod, the supporting shaft, the connecting sleeve, the first rocker arm to rotate clockwise around the center of the shaft sleeve fixed on the left fender, drive the second rocker arm to move horizontally, drive the third rocker arm, the connecting plate, the shift shaft and the sub-gear shifting operating handle to rotate counterclockwise around the center of the sub-gear shift shaft, thereby drive the shift fork shaft to move backward by a set stroke, and further drive the internal shift mechanism of the gearbox to shift to low gear.

[0039] The sub-gear shifting operating handle is welded to the side plate of the fender, and the driver operates the handle according to the driving demand during driving, and the movement of the operating rod is transmitted to the sub-gear mechanism in the gearbox through the connecting rod, after receiving the operating signal, the sub-gear mechanism in the sub-gearbox starts to work to change the meshing state of the sub-gear, and with the change of the meshing state of the gear, the power output of the tractor is also adjusted, so as to achieve the desired driving speed of the driver.

[0040] 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, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A tractor auxiliary speed change operating mechanism characterized by comprising: The utility model relates to a handle, transmission mechanism, executing mechanism, transmission mechanism is used for transmitting the force that handle received to executing mechanism, transmission mechanism includes support axle, axle sleeve, connecting sleeve, first rocker arm, second rocker arm, third rocker arm, shift axle, One end of the support axle is fixedly connected with the handle, the other end of the support axle is fixedly connected with the connecting sleeve, the support axle is installed in the axle sleeve and extends out from both ends, the axle sleeve is installed on the side surface of the mudguard on the side of the seat, the outer side wall of the connecting sleeve is fixedly connected with one end of the first rocker arm, the other end of the first rocker arm is hingedly connected with one end of the second rocker arm, the other end of the second rocker arm is hingedly connected with the third rocker arm, one end of the third rocker arm is fixedly connected with the shift axle, the other end of the shift axle is fixedly connected with a sub-gear shifting control knob through an elastic pin, the other end of the sub-gear shifting control knob is connected in a shift fork shaft slot, and the shift fork shaft is connected with an internal gear hanging mechanism.

2. A tractor auxiliary speed change control mechanism according to claim 1, wherein The second rocker arm is Z-shaped structure, and a rounded corner structure is arranged at the bending position of the second rocker arm.

3. A tractor auxiliary speed change control mechanism according to claim 2, wherein The second rocker arm is hingedly connected with the first rocker arm and the third rocker arm through bearings.

4. The tractor auxiliary speed change control mechanism according to claim 1, wherein One end of the shift axle is welded with a connecting plate, and the connecting plate is fixedly connected with one end of the third rocker arm.

5. A tractor auxiliary speed change control mechanism according to claim 4, wherein The connecting plate and one end of the third rocker arm are fixedly connected through at least two bolts.

6. A tractor auxiliary speed change control mechanism according to claim 5, wherein The third rocker arm is Z-shaped structure.

7. The tractor auxiliary speed change control mechanism according to claim 1, wherein The connecting sleeve is fixedly connected with the support axle through bolts.

8. The tractor auxiliary speed change control mechanism according to claim 1, wherein The handle is fixedly connected with the support axle through welding.

9. The tractor auxiliary speed change control mechanism according to claim 1, wherein The axle sleeve is fixedly installed in the mounting hole of the side surface of the mudguard through welding.

10. The tractor auxiliary speed change control mechanism according to claim 1, wherein A bushing is arranged between the support axle and the axle sleeve.

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