CN201947622U

CN201947622U - Flexible pull cord gearshift structure for miniature tiller

Info

Publication number: CN201947622U
Application number: CN201120054156XU
Authority: CN
Inventors: 郑林; 秦大国; 赵平
Original assignee: CHONGQING SHINERAY POWER EQUIPMENT Co Ltd
Current assignee: Chongqing Shineray Agricultural Machinery Co Ltd
Priority date: 2011-03-03
Filing date: 2011-03-03
Publication date: 2011-08-31
Anticipated expiration: 2021-03-03

Abstract

The utility model discloses a flexible pull cord gearshift structure for a miniature tiller, which is arranged between a handle and a gearbox casing of the miniature tiller. The gearshift structure is characterized in that: the gearshift structure comprises a shift lever, a shift arm, a first pull cord and a second pull cord, the shift lever is movably arranged on the handle of the miniature tiller, the shift arm is movably arranged on the gearbox casing, the shift lever, the shift arm, the first pull cord and the second pull cord are formed into a parallelogram, and the upper and the lower ends of the shift arm can respectively push a declutch shift shaft to move, so that a spindle shift gear in the gearbox casing can be pushed to move axially to generate different engagement states. Since the two flexible pull cords are respectively connected with the shift lever and the shift arm to form the parallelogram-shaped gearshift structure, the gear-shifting operation is convenient and flexible; since the two flexible pull cords are used for replacing integrated metal shift pull rods, even under the circumstance of misoperation, the flexible pull cords cannot collide with an operator, and thereby due to the gearshift structure, the potential safety hazard that the operator is injured by the shift pull rods is eliminated.

Description

Miniature cultivator soft drawn lock gearshift structure

Technical field

The utility model relates to a kind of gearshift of agricultural cultivator, especially adopts the soft drawn lock to carry out the miniature cultivator soft drawn lock gearshift structure of gear shift operation.

Background technology

Agricultural cultivator is as a kind of farm machinery, be widely used in agricultural production arable land (ploughing), weeding, beat the grass etc., replace hand labor and have quick, efficient advantages of higher.The miniature cultivator of prior art, its power set have three gears usually, promptly keep off slowly, keep off soon and neutral, the movable end of the shift handle of its gearshift usefulness is arranged on the arm-rest frame of tiller, and the gear handle is connected on the selector fork of gearbox by gearshift pull bar (gear arm); When needing gearshift, by on arm-rest frame, handling shift handle, making shift handle rotating certain angle (or moving certain distance) drive gearshift pull bar (gear arm) moves, thereby the selector fork axle that drives gearbox rotates an angle or moves certain distance, thereby make selector fork produce action, selector fork drives that the main shaft duplicate gear axially moves on the main shaft, joins gear again with countershaft and produces different engagements, obtains different gearratios and realizes the conversion of gear.

But because the gearshift pull bar is the whole rod member of a metal, there is the risk that bumps with the operator in the gearshift of prior art cultivator, especially makes the operator injured when maloperation easily, and there is certain potential safety hazard in it; In addition, all-in-one-piece gearshift pull bar also exist when gearshift operation not too flexibly, deficiency such as not too steady during gearshift.

Summary of the invention

The utility model is at the above-mentioned deficiency of monoblock type metal gearshift pull bar of prior art, provide a kind of and adopt the soft drawn lock to shift gears, gear shift operation is convenient and flexibly, eliminate the miniature cultivator soft drawn lock gearshift structure of the potential safety hazard that the operator damaged by the pull bar of shifting gears.

The technical solution of the utility model: miniature cultivator soft drawn lock gearshift structure is arranged between the arm-rest frame and gearbox body of miniature cultivator; It is characterized in that: described gearshift structure comprises gear level on the arm-rest frame that is movably arranged on miniature cultivator, be movably arranged on gear arm on the gearbox body, be connected first zip and second zip between gear level and the gear arm, and gear level, gear arm, first zip and second zip constitute a parallelogram; The upper and lower end of gear arm can promote the selector fork axle respectively and move, thereby the main shaft power shift gear that promotes in the gearbox body moves axially.Join gear again with countershaft and produce different engagements, obtain different gearratios and realize the conversion of gear.

Further feature is: rotatable selector fork piece is set on the selector fork axle, forms the zigzag shape, the position of the corresponding main shaft power shift gear in the position of selector fork piece.

Gear level is connected on the arm-rest frame turnably by the gear level fulcrum, and gear arm is connected on the gearbox body turnably by the gear arm fulcrum.

Miniature cultivator soft drawn lock gearshift structure of the present utility model with respect to prior art, has following characteristics:

1, adopt two soft drawns locks that the gear level on the arm-rest frame is connected shape with gear arm on the gearbox

Become the gearshift structure of parallelogram, gear shift operation is convenient and flexible, is convenient to user's operation.

2, replace monoblock type metal gearshift pull bar, instant feelings owing to adopt two soft drawns to lock in maloperation

Under the condition, the soft drawn lock can not collide with the operator yet, eliminates the potential safety hazard that the operator is damaged by the pull bar of shifting gears.

3, integral layout is reasonable, and is simple in structure.

Description of drawings

Fig. 1 is the utility model gearshift structural representation;

Fig. 2 is the vertical view (part-structure) of Fig. 1;

Fig. 3 is the partial enlarged drawing of Fig. 1.

Embodiment

As Fig. 1,2, in 3, the miniature cultivator soft drawn lock of the utility model gearshift structure, be arranged between the arm-rest frame 1 and gearbox body 2 of miniature cultivator, it comprises the gear level 3 on the arm-rest frame 1 that is movably arranged on miniature cultivator, be movably arranged on the gear arm 4 on the gearbox body 2, be connected first zip 5 and second zip 6 between gear level 3 and the gear arm 4, gear level 3, gear arm 4, first zip 5 and second zip 6 constitute a parallelogram, the two ends of first zip 5 and second zip 6 are connected to gear level 3, the upper and lower side of gear arm 4, soft drawn is locked and is carried threaded sleeve, can be used to adjust the length of zip; Connect by the movable button that is riveted on gear level 3, gear arm 4 respectively among the figure, change and cause zipper head to twist this situation with convenient its gear level 3, gear arm 4 angles when shifting gears adjusted; Gear level 3 is connected on the arm-rest frame 1 turnably, install turnably by gear level fulcrum 7 among the figure, gear arm 4 is connected on the gearbox body 2 turnably, install turnably by gear arm fulcrum 8 among the figure, selector fork on gear arm 4 and the gearbox is coupling and touches, when gear arm 4 rotates around gear arm fulcrum 8, on the gear arm 4, the selector fork axle 9 that the lower end can promote respectively to be arranged in the gearbox body 2 rotates, thereby the main shaft power shift gear (main shaft duplicate gear 11) that promotes in the gearbox body 2 moves axially on main shaft, produce different engagements with the countershaft duplicate gear 12 on the countershaft, obtain different gearratios and realize the conversion of gear.

Among the figure, rotatable selector fork piece 10 is set on selector fork axle 9, forms the zigzag shape, the position of the corresponding main shaft duplicate gear 11 in the position of selector fork piece 10 can promote it and move axially.

Gear arm 4 of the present utility model and the syndeton selector fork axle adopt prior art, are not further described at this.

Claims

1. miniature cultivator soft drawn lock gearshift structure is arranged between the arm-rest frame (1) and gearbox body (2) of miniature cultivator; It is characterized in that: described gearshift structure comprises gear level (3) on the arm-rest frame (1) that is movably arranged on miniature cultivator, be movably arranged on gear arm (4) on the gearbox body (2), be connected first zip (5) and second zip (6) between gear level (3) and the gear arm (4), and gear level (3), gear arm (4), first zip (5) and second zip (6) constitute a parallelogram; The selector fork axle (9) that the upper and lower end of gear arm (4) can promote respectively to be arranged in the gearbox body (2) rotates, thereby the main shaft power shift gear that promotes in the gearbox body (2) moves axially on main shaft, produces different engagements.

2. according to the described miniature cultivator soft drawn lock gearshift structure of claim 1, it is characterized in that: rotatable selector fork piece (10) is set on selector fork axle (9), form the zigzag shape, the position of the corresponding main shaft power shift gear in the position of selector fork piece (10).

3. according to claim 1 or 2 described miniature cultivator soft drawn lock gearshift structures, it is characterized in that: gear level (3) is connected on the arm-rest frame (1) turnably by gear level fulcrum (7), and gear arm (4) is connected on the gearbox body (2) turnably by gear arm fulcrum (8).