Shuttle type gear shifting control mechanism of tractor

Abstract

The utility model discloses a shuttle-type gear-shifting control mechanism of a tractor, which relates to the technical field of gear-shifting mechanisms and comprises a gear-shifting rocker arm, a pull rod and a control rod, the free end of the gear-shifting rocker arm is hinged with one end of the pull rod, the control rod vertically swings, and the lower end of the control rod is hinged with the other end of the pull rod; the middle part of the pull rod is a flexible rod; the first mounting plate and the second mounting plate are mounted on one side of the gap bridge shell, the inner diameter of the wear-resistant flexible pipe is larger than the outer diameter of the pull rod, the length of the wear-resistant flexible pipe is smaller than that of the pull rod, and the two ends of the wear-resistant flexible pipe are fixed to the first mounting plate and the second mounting plate respectively; the wear-resistant flexible pipe sleeves the pull rod; the rigid rods at the two ends of the pull rod respectively penetrate through the first mounting plate and the second mounting plate in a sliding manner; the middle of the pull rod is the flexible rod, the outer side of the pull rod is protected by the wear-resistant flexible pipe, the phenomena that the pull rod falls off and deforms due to treading can be reduced, in addition, interference between the flexible rod and other control rods is small, and use is not affected while wear is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of shifting mechanisms, in particular to a shuttle-type shifting operating mechanism for a tractor. Background Art

[0002] At present, the rocker arm of the shuttle shift control mechanism of the tractor is connected to the shuttle shift pull arm through a pull rod, which is located on the upper side of the tractor's flat bottom plate. When using it, the driver is prone to step on the pull rod, causing the pull rod to fall off and deform. In addition, the middle part of the pull rod will interfere with other control levers, which not only affects the use but also causes wear. Utility Model Content

[0003] The utility model aims to provide a shuttle-type gear shifting control mechanism for a tractor in view of the defects in the prior art.

[0004] The technical scheme of the utility model is: a shuttle-type gear shifting control mechanism for a tractor, comprising a gear shifting rocker arm, a pull rod and a joystick, wherein the gear shifting rocker arm is horizontally swingingly arranged, and its free end is hinged to one end of the pull rod; the joystick is vertically swingingly arranged, and its lower end is hinged to the other end of the pull rod; the two ends of the pull rod are rigid rods, and the middle part is a flexible rod;

[0005] It also includes a wear-resistant flexible tube and a first mounting plate and a second mounting plate installed on one side of the bridge housing, the inner diameter of the wear-resistant flexible tube is larger than the outer diameter of the pull rod, and the length of the wear-resistant flexible tube is smaller than the length of the pull rod, and the two ends of the wear-resistant flexible tube are respectively fixed on the first mounting plate and the second mounting plate; the wear-resistant flexible tube is sleeved on the outside of the pull rod, and the rigid rods at the two ends of the pull rod slide through the first mounting plate and the second mounting plate respectively.

[0006] Preferably, both ends of the pull rod are provided with U-shaped forks for hinged connection, a pin is inserted on the U-shaped fork, and the connecting ends of the shift rocker arm and the joystick and the pull rod are provided with sliding grooves that slidably cooperate with the pin.

[0007] Preferably, guide sleeves that are slidably matched with the pull rod rigid rod are fixedly installed in the through holes of the first mounting plate and the second mounting plate.

[0008] Preferably, a telescopic dust cover sleeved on the rigid rod of the pull rod is installed on the back-to-back surfaces of the first mounting plate and the second mounting plate, and the other end of the telescopic dust cover is fixedly sleeved on the rigid rod of the pull rod.

[0009] Compared with the prior art, the utility model has the following advantages:

[0010] The middle part of the pull rod of the device is a flexible rod, and its outer side is protected by a wear-resistant flexible tube, which can reduce the pull rod from falling off and deformation caused by trampling. In addition, the flexible rod has little interference with other operating rods, which does not affect the use while reducing wear; the guide sleeve can provide guidance for the reciprocating motion of the rigid rod and reduce the wear of the rigid rod; the telescopic dust cover can prevent mud and dirt from adhering to the rigid rod that is in sliding contact with the first mounting plate or the second mounting plate, thereby affecting the operation of the pull rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model;

[0012] Figure 2 This is a schematic diagram of the installation of the telescopic dust cover and the guide sleeve.

[0013] In the figure: 1. bridge housing, 2. shift rocker arm, 3. joystick, 4. pull rod, 5. wear-resistant flexible tube, 6. first mounting plate, 7. second mounting plate, 8. U-shaped fork, 9. pin shaft, 10. slide groove, 11. guide sleeve, 12. telescopic dust cover. DETAILED DESCRIPTION

[0014] The utility model is further described below with reference to the accompanying drawings and embodiments. Embodiment 1

[0015] Reference Figure 1 As shown, a shuttle-type shift control mechanism for a tractor includes a shift rocker arm 2, a pull rod 4 and a joystick 3. The shift rocker arm 2 is horizontally swingingly arranged, and its free end is hinged to one end of the pull rod 4; the joystick 3 is vertically swingingly arranged, and its lower end is hinged to the other end of the pull rod 4; the two ends of the pull rod 4 are rigid rods, and the middle part is a flexible rod.

[0016] In more detail, both ends of the pull rod 4 are provided with a U-shaped fork 8 for hinged connection, a pin shaft 9 is inserted on the U-shaped fork 8, and a sliding groove 10 that slides with the pin shaft 9 is provided on the connecting end of the shift rocker arm 2 and the joystick 3 and the pull rod 4.

[0017] It also includes a wear-resistant flexible tube 5 and a first mounting plate 6 and a second mounting plate 7 installed on one side of the bridge housing 1. The inner diameter of the wear-resistant flexible tube 5 is larger than the outer diameter of the pull rod 4, and its length is smaller than the length of the pull rod 4. Its two ends are respectively fixed on the first mounting plate 6 and the second mounting plate 7; the wear-resistant flexible tube 5 is sleeved on the outside of the pull rod 4, and the rigid rods at both ends of the pull rod 4 slide through the first mounting plate 6 and the second mounting plate 7 respectively.

[0018] When in use, the driver operates the joystick 3 to make the pull rod 4 drive the shift rocker arm 2, and the shift rocker arm 2 then drives the shift fork head to move forward and backward through the shift connecting rod, thereby achieving gear shifting, which simply and effectively meets the functional needs.

[0019] The middle part of the pull rod 4 of the device is a flexible rod, and its outer side is protected by a wear-resistant flexible tube 5, which can reduce the pull rod 4 from falling off and deformation due to trampling. In addition, the flexible rod has little interference with other operating rods, which does not affect the use while reducing wear. Embodiment 2

[0020] As a preferred embodiment of the utility model, this embodiment is additionally provided with a guide sleeve 11 and a telescopic dust cover 12 on the basis of the first embodiment, specifically:

[0021] Reference Figure 1-2 As shown, in this embodiment, a guide sleeve 11 that slides with the rigid rod of the pull rod 4 is fixedly installed in the through holes of the first mounting plate 6 and the second mounting plate 7. The guide sleeve 11 can provide guidance for the reciprocating motion of the rigid rod and reduce the wear of the rigid rod.

[0022] A telescopic dust cover 12 is installed on the back-to-back surfaces of the first mounting plate 6 and the second mounting plate 7 and is sleeved on the rigid rod of the pull rod 4. The other end of the telescopic dust cover 12 is fixedly sleeved on the rigid rod of the pull rod 4. The telescopic dust cover 12 can prevent mud and dirt from adhering to the rigid rod in sliding contact with the first mounting plate 6 or the second mounting plate 7, thereby affecting the operation of the pull rod 4.

[0023] The present invention is not limited to the above-mentioned implementation modes. Within the knowledge scope of those skilled in the art, various changes can be made without departing from the purpose of the present invention. The changed contents still belong to the protection scope of the present invention.

Claims

1. A shuttle-type shift control mechanism for a tractor, comprising a shift rocker arm, a pull rod and a joystick, wherein the shift rocker arm is horizontally swingable, and its free end is hinged to one end of the pull rod; the joystick is vertically swingable, and its lower end is hinged to the other end of the pull rod; the characteristics are: The two ends of the pull rod are rigid rods, and the middle part is a flexible rod; It also includes a wear-resistant flexible tube and a first mounting plate and a second mounting plate installed on one side of the bridge housing, the inner diameter of the wear-resistant flexible tube is larger than the outer diameter of the pull rod, and the length of the wear-resistant flexible tube is smaller than the length of the pull rod, and the two ends of the wear-resistant flexible tube are respectively fixed on the first mounting plate and the second mounting plate; the wear-resistant flexible tube is sleeved on the outside of the pull rod, and the rigid rods at the two ends of the pull rod slide through the first mounting plate and the second mounting plate respectively.

2. A shuttle-type shift control mechanism for a tractor according to claim 1, characterized in that: Both ends of the pull rod are provided with U-shaped forks for hinged connection, and a pin is inserted on the U-shaped fork. The connecting ends of the shift rocker arm and the operating lever with the pull rod are provided with sliding grooves for sliding cooperation with the pin.

3. A shuttle-type shift control mechanism for a tractor according to claim 1, characterized in that: A guide sleeve that is slidably matched with the pull rod rigid rod is fixedly installed in the through holes of the first mounting plate and the second mounting plate.

4. A shuttle-type shifting mechanism for a tractor according to claim 1, characterized in that: A telescopic dust cover sleeved on the rigid rod of the pull rod is installed on the back-to-back surfaces of the first mounting plate and the second mounting plate, and the other end of the telescopic dust cover is fixedly sleeved on the rigid rod of the pull rod.

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