CN201396416Y

CN201396416Y - Gearbox body of mini cultivator/hand tractor

Info

Publication number: CN201396416Y
Application number: CN2009200400634U
Authority: CN
Inventors: 郑长夏; 梁国欣
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-04-09
Filing date: 2009-04-09
Publication date: 2010-02-03
Anticipated expiration: 2019-04-09

Abstract

The utility model relates to a gearbox body of a mini cultivator/hand tractor, which comprises a box shell, a left side cover and a right side cover. The box shell is a shell body partially sealed andopen at left and right sides, and the periphery walls at two sides of the box shell are provided with tapped holes; a bearing support with more than five axles is welded at the left side cover and the right side cover at coaxial line, wherein the upper part of the left side cover is provided with a clutch shaft bearing support communicated with the cover body while the lower parts of the left side cover and the right side cover are provided with a drive shaft bearing support communicated with the cover body respectively. The left side cover and the right side cover are respectively arranged in tapped holes at the periphery walls at the left and right sides of the box shell by fasteners. An assembled gearbox body is adopted in the utility model and the manufacturing technology of the gearbox body is simplified while the production cost is reduced. Furthermore, the drive ratio and the gear change of the gearbox are easier.

Description

The gearbox casing of microtilling machine/hand tractor

Technical field

The utility model relates to a kind of gearbox casing of microtilling machine/hand tractor, belongs to the microtractor technical field.

Background technique

Conventional gearbox casing major part is made up of foundry goods or a spot of deep-draw casting die, the bearing support and the casing of each transmission shaft are structure as a whole, need a large amount of specialized mould and special purpose machine tool equipment during manufacturing, especially the processing of the bearing hole on the casing needs to adopt special purpose transfer machine, in case after the velocity ratio of gearbox casing was fixed, the centre distance of each transmission axis hole and casing width all were difficult to maybe can't change.As need gearbox casing is improved design, as change velocity ratio or increase gear etc., then need to change the critical feature size of modular machine tool or deep draw mould, and the manufacturing expense height of the metal mold of foundry goods or deep draw and special processing equipment, manufacturing cycle is long, has therefore restricted the modification of microtractor.

Summary of the invention

The purpose of this utility model provides that a kind of manufacturing process is simple, cost of investment is low, and gearbox velocity ratio and gear modification are easy to the gearbox casing of microtilling machine/hand tractor.

The utility model is that the technological scheme that achieves the above object is: a kind of gearbox casing of microtilling machine/hand tractor, it is characterized in that: comprise case shell, left cap and right cap, described case shell is the housing that sealing all around and left and right sides face open wide, and the perisporium of case shell bi-side is provided with screw; Described left cap and right cap coaxial line are welded with the bearing support more than five, wherein, left cap top has the clutch shaft bearing seat that connects lid, the bottom of left cap and right cap has the driving shaft bearing seat that connects lid, and left cap and right cap are installed in the screw on the face perisporium of the case shell left and right sides by fastening piece respectively.

Gearbox casing of the present utility model is made of case shell, left cap and right cap, the bearing support of each transmission shaft is welded on left and right sides and covers, and do not have related with the case shell, owing to need not to make the special purpose machine tool in demanding machining bearing hole on the case shell, only need conventional machine tooling case mating face, shell both sides and screw, and adopting special-purpose welding clamp to weld each bearing support, left and right side cover gets final product, these three component connect into a gearbox casing by fastening piece, can ensure the quality of products, simplify manufacturing process again, reduced manufacture cost significantly.The utility model since the width of case shell can drag or requirement such as the speed of microtilling machine, power, gear and arbitrarily change width dimensions according to hand, and the centre distance of the bearing saddle bore that covers of left and right sides also can arbitrarily change, therefore this assembly type gearbox casing modification is easy, for the hand of many kinds drags modification to create condition.

Description of drawings

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.

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

The A-A sectional structure schematic representation of Fig. 2.

Fig. 3 is the structural representation of case shell.

Wherein: 1-left cap, 2-case shell, 3-fastening piece, 4-right cap, the slow shelves of 5-axle bearing seat, 6-reverse gear shaft bearing support, 7-clutch shaft bearing seat, 8-first order transmission shafts bearing, 9-second level transmission shafts bearing, 10-third level transmission shaft bearing, 11-driving shaft bearing seat, 12-locating stud.

Embodiment

See shown in Fig. 1～3 that the gearbox casing of microtilling machine/hand tractor of the present utility model comprises case shell 2, left cap 1 and right cap 4.Meeting this case shell 2 shown in Figure 3 is the housing that the sealing all around and the left and right sides are opened wide, and case shell 2 left and right sides face perisporiums are provided with screw, and the width A of this case shell 2 can be controlled in 65-100mm, and the width of case shell 2 can be set according to requirements such as speed, power, gears.The utility model left cap 1 and right cap 4 coaxial lines are welded with the bearing support more than five, wherein, left cap 1 top has the clutch shaft bearing seat 7 that connects lid, the bottom of left cap 1 and right cap 4 has the driving shaft bearing seat 11 that connects lid, see shown in Figure 2, be provided with first order transmission shafts bearing 8 between the utility model left cap 1 and right cap 4 clutch shaft bearing seats 7 and the driving shaft bearing seat 11, second level transmission shafts bearing 9 and third level transmission shaft bearing 10, clutch shaft, each transmission shaft and live axle respectively by Bearing Installation in each bearing support, make correspondence be installed in clutch shaft, gear engagement on each transmission shaft and the live axle and transferring power.See shown in Fig. 1,2, left cap 1 of the present utility model and right cap 4 are installed in the screw on case shell 2 left and right sides face perisporiums by fastening piece 3 respectively, for ease of processing and assembly quality, case shell 2 bi-side are provided with positioning pin hole, and left cap 1 and right cap 4 are respectively by locating stud 12 and case shell 2 location.

The utility model is the requirement of satisfying reverse gear and slow shelves, the top of left cap 1 and right cap 4 also has reverse gear shaft bearing support 6 and slow shelves axle bearing seat 5, reverse gear shaft bearing support 6 is positioned at the left side of clutch shaft bearing seat 7, slow shelves axle bearing seat 5 is positioned at the top of clutch shaft bearing seat 7, slow shelves axle bearing seat 5 on the right cap 4 extends to the right, and clutch shaft bearing seat 7, the center line of the centerline offset case shell 2 of reverse gear shaft bearing support 6 and slow shelves bearing support 5, case shell 2 is provided with clutch gear shift fork mounting hole and slow shelves gear shifter fork mounting hole, by clutch gear shift fork and slow shelves gear shifter fork controlled clutch gear and slow shelves gear, to realize reverse gear, the speed shelves.

The centre distance of each bearing support on left cap 1 of the present utility model and the right cap 4 also can change according to designing requirement, and simpler production technology reduces manufacture cost, and has created condition for the hand of many kinds drags modification.

Claims

1, a kind of gearbox casing of microtilling machine/hand tractor, it is characterized in that: comprise case shell (2), left cap (1) and right cap (4), described case shell (2) is the housing that sealing all around and left and right sides face open wide, and the perisporium of case shell (2) bi-side is provided with screw; Described left cap (1) and right cap (4) coaxial line are welded with the bearing support more than five, wherein, left cap (1) top has the clutch shaft bearing seat (7) that connects lid, the bottom of left cap (1) and right cap (4) has the driving shaft bearing seat (11) that connects lid, and left cap (1) and right cap (4) are installed in the screw on the face perisporium of case shell (2) left and right sides by fastening piece (3) respectively.

2, the gearbox casing of 1 described microtilling machine/hand tractor as requested, it is characterized in that: the top of described left cap (1) and right cap (4) also has coaxial line reverse gear shaft bearing support (6) and slow shelves axle bearing seat (5), reverse gear shaft bearing support (6) is positioned at the left side of clutch shaft bearing seat (7), and slow shelves axle bearing seats (5) are positioned at the top of clutch shaft bearing seat (7).

3, the gearbox casing of 1 or 2 described microtilling machine/hand tractors as requested is characterized in that: case shell (2) is provided with clutch gear shift fork mounting hole and slow shelves gear shifter fork mounting hole.

4, the gearbox casing of 2 described microtilling machine/hand tractors as requested is characterized in that: the center line of described clutch shaft bearing seat (7), reverse gear shaft bearing support (6) and slow shelves axle bearing seat (5) centerline offset case shells (2).

5, the gearbox casing of 2 described microtilling machine/hand tractors as requested is characterized in that: the slow shelves axle bearing seats (5) on the described right cap (4) extend to the right.

6, the gearbox casing of 1 described microtilling machine/hand tractor as requested, it is characterized in that: the width A of described case shell (2) is at 65-100mm.