CN210531593U

CN210531593U - Power output gear shifting mechanism of agricultural tractor

Info

Publication number: CN210531593U
Application number: CN202020549261.XU
Authority: CN
Inventors: 王兴洪
Original assignee: Ningbo Benye Heavy Industry Co ltd
Current assignee: Ningbo Benye Heavy Industry Co ltd
Priority date: 2020-04-15
Filing date: 2020-04-15
Publication date: 2020-05-15
Anticipated expiration: 2030-04-15

Abstract

The utility model provides an agricultural tractor power take off gearshift, including guide pillar and shift fork, the both ends of guide pillar are equipped with positioning step face and ring groove respectively, positioning step face and the laminating of the left side inner wall of box, the ring groove inside callipers have a jump ring, the jump ring with the laminating of the right side inner wall of box, the lateral wall of guide pillar is fixed with two locating pins, the head of shift fork has seted up the guide hole, the guide hole cover is established on the guide pillar between two the locating pins, the head of guide pillar extends to outside the box, the head lateral wall of guide pillar has seted up the draw-in groove; a positioning plate is fixed on the outer wall of the box body through a locking bolt, and a clamping part with the same width as the clamping groove is formed at the end part of the positioning plate and clamped in the clamping groove; and a sealing ring is arranged between the guide post and the side wall of the box body. The utility model discloses agricultural tractor power take off gearshift, compact structure, low in manufacturing cost, loading and unloading are convenient, and structural strength is high, and stability is good.

Description

Power output gear shifting mechanism of agricultural tractor

Technical Field

The utility model relates to an agricultural tractor, in particular to agricultural tractor power take off gearshift.

Background

With the development of industry, the progress of agriculture is also obviously improved, various devices appear, the traditional cattle cultivation and manual initialization production are replaced, the production efficiency is greatly improved, a walking tractor is taken as an example, the walking tractor is a transportation tool and agricultural machinery popular in villages and towns in China, and a diesel engine is taken as power, so that the walking tractor is popular with farmers due to the characteristics of small size, flexibility and strong power. The drive type, the traction type, and the combined drive and traction type are classified according to the working performance. The driving type is mainly matched with the rotary cultivator for operation, so the machine is also called a power cultivator; the traction type is mainly matched with traction type farm tools for operation; the dual-purpose type can be matched with a rotary cultivator for operation, and can be matched with a traction farm tool for operation or matched with a trailer for transportation operation.

The tractor stirs gear shaft axial displacement through the shift fork when shifting the variable speed, thereby use the driving gear and the driven gear of different ratios to mesh in order to realize shifting, because gearbox manufacturing accuracy, especially between the engaged gear, there is the tooth clearance, can produce certain rigidity impact in the twinkling of an eye shifting, shake the shift fork, make the guide pillar produce the displacement risk, influence shift fork precision and guide pillar precision, therefore, when the problem appearing, need maintain or change, traditional gearbox receives the structure influence, the shift fork is dismantled very inconveniently.

SUMMERY OF THE UTILITY MODEL

【1】 Technical problem to be solved

The to-be-solved technical problem of the utility model is to provide a high and convenient agricultural tractor power take off gearshift of loading and unloading of intensity.

【2】 Technical scheme for solving problems

The utility model provides an agricultural tractor power take off gearshift installs on the box 1 of gearbox, and it includes guide pillar 6 and shift fork 3, guide pillar 6 level is fixed in the box, the both ends of guide pillar are equipped with location step face 61 and annular clamping groove respectively, the location step face is laminated with the left side inner wall of box, the inside card of annular clamping groove is equipped with jump ring 63, jump ring and the right side inner wall laminating of box, the lateral wall of guide pillar is fixed with two locating pins 62, the head of shift fork has seted up the guide hole, the guide hole cover is established on the guide pillar between two the locating pins, the head of guide pillar extends outside the box, the head lateral wall of guide pillar has seted up draw-in groove 65; a positioning plate 7 is fixed on the outer wall of the box body through a locking bolt 71, and a clamping part with the same width as the clamping groove is formed at the end part of the positioning plate and is clamped in the clamping groove; and a sealing ring is arranged between the guide post and the side wall of the box body.

Furthermore, the side wall of the guide pillar is provided with two parallel screw holes, the axis of the screw hole is perpendicular to and intersected with the axis of the guide pillar, the outer wall of the positioning pin is provided with external threads, the positioning pin is in threaded connection with the screw hole, two ends of the positioning pin extend out of the screw hole, the side wall of the positioning pin is provided with an annular positioning groove 620, the side wall of the guide pillar is fixed with a clamping plate 623 through a screw 624, and the head of the clamping plate is clamped in the annular positioning groove 620.

Furthermore, a sliding area is formed between the two positioning pins, and the clamping plate is located outside the sliding area.

Furthermore, the head of the clamping plate is provided with a semicircular clamping groove, and the radius of the semicircular clamping groove is the same as that of the annular positioning groove and is clamped in the annular positioning groove.

Further, the thickness of the clamping plate is the same as the width of the annular positioning groove.

Furthermore, the side wall of the guide post is provided with a mounting groove for accommodating the clamping plate to be clamped in, the mounting groove has the same cross section with the clamping plate, and the depth of the mounting groove is larger than or equal to the thickness of the clamping plate.

Furthermore, both ends of the positioning pin are provided with clamping plates.

【3】 Advantageous effects

The power output gear shifting mechanism of the agricultural tractor of the utility model optimizes the structure of the shifting fork guide post structure, adds the step surface and the snap spring, has convenient assembly and accurate positioning, can bear axial impact force, and has slightly high structure; the threaded positioning pin is convenient and labor-saving to assemble and disassemble; the clamping plate is arranged, so that the connection reliability of the positioning pin is further improved, and the working stability is improved; the utility model discloses agricultural tractor power take off gearshift, compact structure, low in manufacturing cost, loading and unloading are convenient, and structural strength is high, and stability is good.

Drawings

Fig. 1 is a schematic structural view of a shifting fork of the power output gear shifting mechanism of the agricultural tractor of the utility model;

fig. 2 is a schematic structural view of the power output gear shifting mechanism of the agricultural tractor of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2;

in the figure: 1-box body, 3-shifting fork, 4-shifting rod shaft, 41-shifting rod, 6-guide column, 61-positioning step surface, 62-positioning pin, 620-annular positioning groove, 623-clamping plate, 624-screw, 63-clamping spring, 64-annular groove, 65-clamping groove, 7-positioning plate, 71-locking bolt and 711-gasket.

Detailed Description

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1 to 3, the utility model provides an agricultural tractor power take off gearshift, install in the box 1 of gearbox, including guide pillar 6 and shift fork 3, guide pillar 6 is horizontally fixed in box 1, the head of guide pillar 6 is equipped with a cylindricality head, the diameter of this cylindricality head is less than the diameter of guide pillar body, consequently form a location step face 61 between head and body, be equipped with the mounting hole at the box 1 lateral wall, the cylindricality head cover is established in this mounting hole, and location step face 61 contacts with the left side inner wall of box 1, be equipped with annular groove 64 in the lateral wall of cylindricality head or the mounting hole, be equipped with the sealing washer in annular groove 64, realize sealedly; an annular clamping groove is formed in the right side of the guide pillar body, a clamp spring 63 is arranged in the annular clamping groove, the clamp spring 63 is attached to the inner wall of the right side of the box body 1, so that the guide pillar 6 is axially positioned, the head of the guide pillar 6 extends out of the box body 1, a clamping groove 65 is formed in the side wall of the head of the guide pillar 6, a positioning plate 7 is fixed to the outer wall of the box body 1 through a locking bolt 71, a gasket 711 is arranged between the locking bolt 71 and the positioning plate 7, a clamping portion with the width identical to that of the clamping groove 65 is formed at the end portion of the positioning plate 7 and clamped in the clamping groove 65 of the head of the guide pillar, axial and radial fixing is achieved, sliding or rotation of the clamping portion is prevented, an annular groove 64 for installing a sealing ring is formed in the head of the; two positioning pins 62 are fixed on the side wall of the guide post 6, the head of the shifting fork 3 is provided with a guide hole, the guide hole is sleeved on the guide post 6 between the two positioning pins 62, a sliding area is formed between the two positioning pins 62, the shifting fork 3 is slidably matched in the sliding area, the other end of the shifting fork 3 is Y-shaped and used for shifting the gear to axially slide, the side wall of the box body 1 is provided with a shifting rod shaft 4, the end part of the shifting rod shaft is provided with a shifting rod 41, the end part of the shifting rod 41 is spherical, the head of the shifting fork 3 is provided with a groove, and the head of the shifting rod 41 is positioned in; in order to improve the overall strength and facilitate assembly and disassembly, two parallel screw holes are formed in the side wall of the guide post 6, the axes of the screw holes are perpendicular to and intersected with the axis of the guide post 6, external threads are formed in the outer wall of the positioning pin 62, the positioning pin 62 is connected into the screw holes through threads, an inner hexagonal hole is formed in the end portion of the positioning pin 62, two ends of the positioning pin 62 extend out of the screw holes, in order to avoid vibration to enable the positioning pin to axially move, an annular positioning groove 620 is formed in the side wall of the positioning pin 62, a clamping plate 623 is fixed to the side wall of the guide post 6 through a screw 624, and the head of the clamping plate 623 is clamped in the annular positioning; in order to facilitate assembly and have higher strength, the side wall of the guide pillar 6 is provided with a mounting groove for clamping the clamping plate 623, the mounting groove is located outside the sliding region, the mounting groove is identical to the cross section of the clamping plate 623, the mounting groove just holds the clamping plate 623 to be clamped, the depth of the mounting groove is greater than or equal to the thickness of the clamping plate 623, the head of the clamping plate 623 is provided with a semicircular clamping groove, the radius of the semicircular clamping groove is identical to that of the annular positioning groove 620, the semicircular clamping groove is clamped in the annular positioning groove 620, the thickness of the clamping plate 623 is identical to the axial width of the annular positioning groove 620, axial movement of the positioning pin is avoided, in order to further improve structural strength and stability, two ends of each positioning pin.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides an agricultural tractor power take off gearshift installs on the box of gearbox, its characterized in that: the guide post is horizontally fixed in a box body, a positioning step surface and an annular clamping groove are respectively arranged at two ends of the guide post, the positioning step surface is attached to the inner wall of the left side of the box body, a clamp spring is clamped in the annular clamping groove and is attached to the inner wall of the right side of the box body, two positioning pins are fixed on the side wall of the guide post, a guide hole is formed in the head of the shifting fork, the guide hole is sleeved on the guide post between the two positioning pins, the head of the guide post extends out of the box body, and a clamping groove is formed in the side wall of the head of the guide post; a positioning plate is fixed on the outer wall of the box body through a locking bolt, and a clamping part with the same width as the clamping groove is formed at the end part of the positioning plate and clamped in the clamping groove; and a sealing ring is arranged between the guide post and the side wall of the box body.

2. An agricultural tractor power take off shift mechanism as defined in claim 1, wherein: the side wall of the guide pillar is provided with two parallel screw holes, the axis of each screw hole is perpendicular to and intersected with the axis of the guide pillar, the outer wall of the positioning pin is provided with external threads, the positioning pin is connected in the screw holes in a threaded mode, two ends of the positioning pin extend out of the screw holes, the side wall of the positioning pin is provided with an annular positioning groove, the side wall of the guide pillar is fixed with a clamping plate through screws, and the head of the clamping plate is clamped in the annular positioning groove.

3. An agricultural tractor power take off shift mechanism as defined in claim 2, wherein: a sliding area is formed between the two positioning pins, and the clamping plate is located outside the sliding area.

4. An agricultural tractor power take off shift mechanism as defined in claim 2, wherein: the head of the clamping plate is provided with a semicircular clamping groove, and the radius of the semicircular clamping groove is the same as that of the annular positioning groove and is clamped in the annular positioning groove.

5. An agricultural tractor power take off shift mechanism as defined in claim 2, wherein: the thickness of the clamping plate is the same as the width of the annular positioning groove.

6. An agricultural tractor power take off shift mechanism as defined in claim 2, wherein: the side wall of the guide post is provided with a mounting groove for the clamping plate to be clamped in, the mounting groove is the same as the cross section of the clamping plate, and the depth of the mounting groove is larger than or equal to the thickness of the clamping plate.

7. An agricultural tractor power take off shift mechanism as defined in claim 2, wherein: and clamping plates are arranged at two ends of the positioning pin.