CN205326797U - Tractor front drive axle - Google Patents

Abstract

The utility model discloses a tractor front drive axle, which belongs to the technical field of tractor accessories. The structure includes a main reduction box assembly, a terminal transmission box assembly and a steering hydraulic cylinder assembly. The transmission housings are respectively connected to the end transmission box assembly, sleeves are respectively installed in the side transmission housings on both sides of the main reduction box assembly, and half shafts are installed in the sleeves; the steering hydraulic cylinder assembly is installed on the front side of the main reduction box assembly The main gearbox assembly includes a central axle housing and a differential. A differential is installed on the left side of the central axle housing. The left and right sides of the differential are connected to the axle shafts. The driven helical gear, the driven helical gear meshes with the driving helical gear installed on the rear side of the central axle housing. The utility model has the characteristics of reasonable design, simple structure, easy processing and the like. The front drive axle has a higher ground clearance and improves the passability of the tractor in paddy field areas with deep mud feet.

Description

A tractor front drive axle

technical field

The utility model relates to the technical field of tractor accessories, in particular to a tractor front drive axle.

Background technique

Tractors can be divided into two-wheel drive and four-wheel drive according to the driving mode. Two-wheel drive refers to rear-wheel drive, and its front axle has functions such as supporting the body, steering, and walking. Both the front and rear tires of a four-wheel drive tractor can be used as driving wheels. It is used to improve the passability of the tractor when working under the ground.

The structural types of the final drive of the tractor front drive axle mainly include external meshing cylindrical gear transmission, single-stage planetary gear transmission and bevel gear transmission. Among them, single-stage planetary gear transmission and bevel gear transmission are widely used. Among them, the ground clearance of bevel gear transmission is better than that of single-stage planetary gear transmission, but in some paddy field areas with deep mud feet, the ground clearance of the front drive axle of ordinary bevel gear transmission is still slightly insufficient, which affects the passage of tractors sex.

Contents of the invention

The technical task of the present utility model is to provide a tractor front drive axle suitable for the paddy field area with deep mud feet aiming at the above deficiencies.

The technical scheme adopted by the utility model to solve the technical problem is: the front drive axle includes the main reduction box assembly, the terminal transmission box assembly and the steering hydraulic cylinder assembly, and the left and right sides of the main reduction box assembly pass through the side transmission shell The body is respectively connected to the end transmission box assembly, the side transmission housings on both sides of the main reduction box assembly are respectively installed with bushings, and the half shafts are installed in the casings; the steering hydraulic cylinder assembly is installed on the front side of the main reduction box assembly;

The main reduction box assembly includes a central axle housing and a differential. A differential is installed on the left side of the central axle housing. The left and right sides of the differential are connected to the axle shafts. The driven helical gear meshes with the driving helical gear mounted on the rear side of the central axle housing.

Back-up rings are installed on the inner ends of the two sleeves.

The terminal transmission box assembly includes a terminal transmission box, a connecting cover and a large end cover, the large end cover is installed on the outside of the terminal transmission box, a front drive shaft is installed in the large end cover, and a The planetary gear frame, the inner end of the front drive shaft is equipped with a three-stage reduction driven gear; the inner side of the terminal transmission box is connected with the connecting cover, the steering shaft seat is installed in the connecting cover, and the end spline shaft is installed on the steering shaft seat , One end of the end spline shaft is installed with a three-stage reduction driving gear, and the three-stage reduction driving gear meshes with the three-stage reduction driven gear; the other end of the end spline shaft is installed with a two-stage reduction driven gear, and the two-stage reduction gear The driven gear meshes with the two-stage reduction driving gear installed on the outside of the bushing.

A retaining ring is installed between the planet carrier and the front drive shaft.

The two-stage deceleration driving gear meshes and is installed on the outside of the casing through bearings.

The steering hydraulic cylinder assembly includes a steering cylinder, a protective cover, a piston rod, a left steering connecting rod and a right steering connecting rod; the left and right sides of the steering cylinder are respectively slidably connected to the piston rod, and the piston rods on the left and right sides are connected by connecting balls. The head is respectively connected with the left steering link and the right steering link, and the outer sides of the left steering link and the right steering link are installed and connected together with the ear sockets.

A protective cover is installed on the periphery of the piston rod, and the protective cover is fixed on the oil cylinder support through cylindrical head screws.

Compared with the prior art, a tractor front drive axle of the utility model has the characteristics of reasonable design, simple structure, and easy processing. Passability.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is further described.

Accompanying drawing 1 is a structural schematic diagram of a tractor front drive axle.

Accompanying drawing 2 is the top view of accompanying drawing 1.

In the figure: 1. Front drive shaft, 2. Planetary gear carrier, 3. Stop ring, 4. Three-stage reduction driven gear, 5. Terminal transmission box, 6. Connecting cover, 7. Steering shaft seat, 8. End Spline shaft, 9, secondary reduction driven gear, 10, secondary reduction driving gear, 11, side transmission housing, 12, half shaft, 13, end large cover, 14, tertiary reduction driving gear, 15, Bearing, 16, left steering connecting rod, 17, bushing, 18, connecting ball joint, 19, piston rod, 20, retaining ring, 21, oil cylinder support, 22, differential, 23, steering oil cylinder, 24, cylinder Head screw, 25, protective cover, 26, right steering connecting rod, 27, lug seat, 28, central axle housing, 29, driven helical gear, 30, driving helical gear.

detailed description

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described.

Example 1:

A front drive axle of a tractor according to the utility model, its structure includes a main reduction box assembly, a terminal transmission box assembly and a steering hydraulic cylinder assembly, the left and right sides of the main reduction box assembly are respectively connected to the ends through the side transmission housing 11 The transmission box assembly and the side transmission housings 11 on both sides of the main reduction box assembly are respectively equipped with sleeves 17, the inner ends of the two sleeves 17 are installed with retaining rings 20, and the sleeves 17 are installed with half shafts 12 ;The steering hydraulic cylinder assembly is installed on the front side of the main gearbox assembly;

The main gearbox assembly includes a central axle housing 28 and a differential 22, the left side of the central axle housing 28 is equipped with a differential 22, and the left and right sides of the differential 22 are connected with the axle shaft 12, and the differential The right side of the gear 22 is equipped with a driven helical gear 29, and the driven helical gear 29 meshes with the driving helical gear 30 installed on the central axle housing 28 rear side.

The terminal drive box assembly includes a terminal drive box 5, a connecting cover 6 and a large end cover 13, the large end cover 13 is installed on the outside of the end drive box 5, and the front drive shaft 1 is installed in the large end cover 13 , the front drive shaft 1 is equipped with a planetary gear carrier 2 through a spline, and a stop ring 3 is installed between the planetary gear carrier 2 and the front drive shaft 1; the inner end of the front drive shaft 1 is equipped with a three-stage reduction driven gear 4 The inner side of the terminal transmission box 5 is connected with the connecting cover 6, the steering shaft seat 7 is installed in the connecting cover 6, the end spline shaft 8 is installed on the steering shaft seat 7, and the end spline shaft 8 is equipped with a three-stage The reduction driving gear 14, the three-stage reduction driving gear 14 meshes with the three-stage reduction driven gear 4; the other end of the end spline shaft 8 is equipped with a secondary reduction driven gear 9, and the secondary reduction driven gear 9 is installed on The two-stage reduction drive gear 10 on the outside of the casing 17 meshes, and the two-stage reduction drive gear 10 meshes and is installed on the outside of the casing 17 through the bearing 15 .

The steering hydraulic cylinder assembly includes a steering cylinder 23, a protective cover 25, a piston rod 19, a left steering connecting rod 16 and a right steering connecting rod 26; The piston rod 19 on the side is connected with the left steering link 16 and the right steering link 26 respectively through the connecting ball joint 18, and the outer sides of the left steering link 16 and the right steering link 26 are installed and connected together with the ear socket 27, and the piston rod 19 The periphery of the protective cover 25 is installed, and the protective cover 25 is on the oil cylinder support 21 by cylinder head screw 24. When the piston rod 19 moves to the left, the left steering link 16 is pushed, and the right steering link 26 is pulled at the same time, thereby driving the end transmission box assembly to rotate and realizing the function of front wheel steering.

Through the above specific implementation methods, those skilled in the art can easily realize the utility model. However, it should be understood that the utility model is not limited to the above-mentioned several specific implementation modes. On the basis of the disclosed embodiments, those skilled in the art can arbitrarily combine different technical features to achieve different technical solutions.

Claims (7)

1. A tractor front drive axle, characterized in that the front drive axle comprises a main reduction box assembly, a terminal transmission box assembly and a steering hydraulic cylinder assembly, and the left and right sides of the main reduction box assembly pass through the side transmission housing The end transmission box assembly is respectively connected, the side transmission housings on both sides of the main reduction box assembly are respectively installed with bushings, and the half shaft is installed in the casing; the steering hydraulic cylinder assembly is installed on the front side of the main reduction box assembly; The main reduction box assembly includes a central axle housing and a differential. A differential is installed on the left side of the central axle housing. The left and right sides of the differential are connected to the axle shafts. The driven helical gear meshes with the driving helical gear mounted on the rear side of the central axle housing. 2. A tractor front drive axle according to claim 1, characterized in that retaining rings are installed on the inner ends of the two bushings. 3. A tractor front drive axle according to claim 1, characterized in that, said terminal drive box assembly comprises a terminal drive box, a connecting cover and a large end cover, and the large end cover is installed on the end drive box On the outer side, the front drive shaft is installed in the large end cover, the planetary wheel frame is installed on the front drive shaft, and the three-stage reduction driven gear is installed on the inner end of the front drive shaft; the inner side of the terminal transmission box is connected with the connecting cover, A steering shaft seat is installed in the connecting cover, and an end spline shaft is installed on the steering shaft seat. A three-stage reduction driving gear is installed on one end of the end spline shaft, and the three-stage reduction driving gear meshes with the three-stage reduction driven gear; The other end of the splined shaft at the end is provided with a secondary reduction driven gear, and the secondary reduction driven gear meshes with the secondary reduction driving gear installed on the outside of the casing. 4. A tractor front drive axle according to claim 3, characterized in that a retaining ring is installed between the planet carrier and the front drive shaft. 5. A tractor front drive axle according to claim 3, characterized in that, said two-stage deceleration driving gear meshes and is mounted on the outside of the bushing through a bearing. 6. A tractor front drive axle according to claim 1, wherein the steering hydraulic cylinder assembly includes a steering cylinder, a protective cover, a piston rod, a left steering connecting rod and a right steering connecting rod; The left and right sides of the steering rod are slidingly connected with the piston rods respectively, and the piston rods on the left and right sides are respectively connected with the left steering connecting rod and the right steering connecting rod through the connecting ball joints, and the outer sides of the left steering connecting rod and the right steering connecting rod are installed and connected with the lugs. together. 7. A tractor front drive axle according to claim 6, characterized in that a protective cover is installed on the periphery of the piston rod, and the protective cover is fixed on the oil cylinder support through cylindrical head screws.