CN203248623U

CN203248623U - Reverse gear assembly structure of miniature tilling machine

Info

Publication number: CN203248623U
Application number: CN 201320167099
Authority: CN
Inventors: 徐伟
Original assignee: CHONGQING HUATIAN HAOLI MACHINERY Co Ltd
Current assignee: CHONGQING HUATIAN HAOLI MACHINERY Co Ltd
Priority date: 2013-04-07
Filing date: 2013-04-07
Publication date: 2013-10-23
Anticipated expiration: 2023-04-07

Abstract

The utility model discloses a reverse gear assembly structure of a miniature tilling machine. The reverse gear assembly structure of the miniature tilling machine comprises a shaft body, a driving bull gear and a driven pinion, wherein the driving bull gear and the driven pinion are sleeved with a shaft body in an embedded mode, a sleeve coupler and a three-jaw coupler are arranged between the driving bull gear and the driven pinion, the sleeve coupler is sleeved with a spline structure at the inner edge of a shaft hole of the driving bull gear in an embedded mode, the left half part of the three-jaw coupler is directly connected with the driven pinion, the right half part of the three-jaw coupler and the sleeve coupler are connected into a whole and can make axial motion along the shaft body so that the left half part and the right half part of the three-jaw coupler can be buckled and separated. The reverse gear assembly structure of the miniature tilling machine is small in abrasion, high in transmission efficiency and long in service life.

Description

The Miniature cultivator used on higher assembly structure that reverses gear

Technical field

The utility model belongs to the agricultural equipment technical field, relates to a kind of Miniature cultivator used on higher assembly structure that reverses gear.

Background technique

At present, Miniature cultivator used on higher is used more and more wider in the vast rural area of China as a kind of small-sized agricultural equipment, can replace neatly manually finishing the farming work in the field.For the convenience that operates and laborsaving, tiller is generally all with reversing gear.Yet reverse gear directly is nested on the reverse gear shaft and turns round in the existing assembly that reverses gear, thereby make and be sliding friction between axle and the gear hole, this Placement friction factor is larger, not only transmission efficiency reduces, and serious wear between axle and the gear hole, thereby the gap between axle of long duration and the gear hole increases gradually the assembly that reverses gear is scrapped.

Summary of the invention

Main purpose of the present utility model provides a kind of Miniature power tiller change-speed gear box assembly structure that reverses gear, and solves existing Miniature cultivator used on higher reverse gear serious wear between assembly axis body and the gear, working life is short and transmission efficiency is low problem.

In order to realize goal of the invention, the technological scheme that the utility model adopts is, a kind of Miniature cultivator used on higher assembly structure that reverses gear, include axis body, active gearwheel and driven small gear, initiatively gearwheel and driven small gear are nested on the axis body by deep groove ball bearing and needle bearing respectively, initiatively be provided with box coupling and the three-claw interlocking device that is nested on the axis body between gearwheel and the driven small gear, box coupling is nested in the spline structure of active gearwheel axis hole inner edge by the spline structure that is arranged on its outer surface, three-claw interlocking device left side directly is connected with driven small gear, makes the left side of three-claw interlocking device can realize fastening and separating with right-hand part thereby three-claw interlocking device right-hand part connects as one with box coupling and can do axial motion along axis body.

Feature of the present utility model also is, is provided with annular retaining ring near the position outside the active gearwheel on the axis body.

The beneficial effects of the utility model are:

1) the assembly relevant position between axis body and gear of reversing gear of the present utility model arranges deep groove ball bearing and needle bearing, has avoided the wearing and tearing between axis body and the gear axis hole, the working life of greatly having improved the assembly that reverses gear;

2) will to have the reverse gear sliding friction formal transformation of assembly of microtilling machine now be the rolling friction form to the utility model, reduced friction factor, greatly improved transmission efficiency.

Description of drawings

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the A-A cross-sectional view of the utility model structure;

Fig. 3 is the mounting structure schematic diagram of the utility model in gearbox.

Among the figure, 1. axis body, 2. gearwheel initiatively, 3. driven small gear, 4. deep groove ball bearing, 5. needle bearing, 6. box coupling, 7. three-claw interlocking device, 8. back-up ring, 9. main shaft, the drive gear disk of 10. reversing gear, 11. countershafts, 12. first gear dishes, 13. back forks.

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is elaborated.

The utility model provides a kind of Miniature cultivator used on higher assembly structure that reverses gear, as shown in Figures 1 and 2, include axis body 1, active gearwheel 2 and driven small gear 3, initiatively gearwheel 2 and driven small gear 3 are nested on the axis body 1 by deep groove ball bearing 4 and needle bearing 5 respectively, initiatively be provided with box coupling 6 and the three-claw interlocking device 7 that links together between gearwheel 2 and the driven small gear 3, box coupling 6 is nested in the spline structure of active gearwheel 2 axis hole inner edges by the spline structure that is arranged on its outer surface, three-claw interlocking device 7 directly is connected with driven small gear 3, thereby the right-hand part of box coupling 6 and three-claw interlocking device 7 can be done axial motion along axis body 1 and makes the left side of three-claw interlocking device 7 can realize fastening and separating with right-hand part.

During implementation, as shown in Figure 2, axis body 1 is preferably multidiameter shaft, the thinner end of axis body 1 passes from the axis hole of deep groove ball bearing 4 that deep groove ball bearing 4 is nestled up back-up ring 8 is fixing, initiatively gearwheel 2 penetrates from axis body 1 same end its axis hole inner edge is nested on the deep groove ball bearing 4 in the drive fit mode, subsequently the connecting body of box coupling 6 with three-claw interlocking device 7 right-hand parts is assemblied on the axis body 1, the spline structure of box coupling 6 outer surfaces and the spline structure of active gearwheel 2 axis hole inner edges are closely cooperated.Afterwards from the axis body 1 same direction needle bearing 5 of packing into, the shaft hole diameter of needle bearing 5 is identical with the diameter of the thin part of axis body 1, needle bearing 5 can be stuck in axis body 1 hierarchic structure place, thereby subsequently the connecting body of driven small gear 3 and three-claw interlocking device 7 left sides is nested in the assembling of finishing whole assembly structure on the needle bearing 5 in friction tight mode.

Axis body 1 two ends are connected on the gearbox casing, as shown in Figure 3, initiatively gearwheel 2 all the time with transmission main shaft 9 on the drive gear disk 10 of reversing gear mesh together, driven small gear 3 all the time with countershaft 11 on first gear dish 12 mesh together, be provided with back fork 13 on the gearbox casing of three-claw interlocking device 7 sides, the shift fork jaw is stuck in the joint of box coupling 6 and three-claw interlocking device 7 right-hand parts, need to change when reversing gear, pull back fork 13, thereby back fork 13 drive three-claw interlocking devices 7 right-hand parts move to the left side three-claw interlocking device 7 are snapped together, the power of motor is transferred on the active gearwheel 2 by main shaft 9, initiatively gearwheel 2 is transferred to driving torque on the driven small gear 3 by box coupling 6 and three-claw interlocking device 7, driven small gear 3 drives countershaft 11 by first gear dish 12 and rotates, and final driving torque is transported to the walking case by the bevel gear on the countershaft 11 with power.

Above demonstration and described basic principle of the present utility model, major character and advantage of the present utility model; above-mentioned mode of execution and specification are principle of the present utility model; the utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these changes and improvements all fall in the claimed scope of the present utility model.The protection domain that the utility model requires is defined by claims and equivalent thereof.

Claims

1. Miniature cultivator used on higher assembly structure that reverses gear, it is characterized in that, include axis body (1), active gearwheel (2) and driven small gear (3), described active gearwheel (2) and driven small gear (3) are nested on the axis body (1) by deep groove ball bearing (4) and needle bearing (5) respectively, initiatively be provided with box coupling (6) and the three-claw interlocking device (7) that is nested on the axis body (1) between gearwheel (2) and the driven small gear (3), described box coupling (6) is nested in the spline structure of active gearwheel (2) axis hole inner edge by the spline structure that is arranged on its outer surface, three-claw interlocking device (7) left side directly is connected with driven small gear (3), three-claw interlocking device (7) right-hand part and box coupling (6) connect as one and can be along axis body (1) thus doing axial motion makes the left side of three-claw interlocking device (7) can realize fastening and separating with right-hand part.

2. a kind of Miniature cultivator used on higher as claimed in claim 1 assembly structure that reverses gear is characterized in that, the upper position near active gearwheel (2) outside of described axis body (1) is provided with annular retaining ring (8).