CN211107679U

CN211107679U - Novel power-assisted steering mechanism of two-wheeled tractor

Info

Publication number: CN211107679U
Application number: CN201921612801.8U
Authority: CN
Inventors: 王自忠; 林韶跃
Original assignee: Zhejiang Peseter Power Machinery Co ltd
Current assignee: Zhejiang Peseter Power Machinery Co ltd
Priority date: 2019-09-25
Filing date: 2019-09-25
Publication date: 2020-07-28
Anticipated expiration: 2029-09-25

Abstract

The utility model belongs to the technical field of two-wheeled tractors, in particular to a novel power-assisted steering mechanism of a two-wheeled tractor, which comprises a frame and an engine, wherein a transmission device is arranged on the engine; the transmission device of the engine drives the left rolling mechanism and the right rolling mechanism respectively through a left spline shaft and a right spline shaft; the frame is provided with a left hydraulic brake mechanism, a right hydraulic brake mechanism, a left hydraulic handle mechanism and a right hydraulic handle mechanism; the left hydraulic handle mechanism controls the left rolling mechanism to rotate through a left hydraulic brake mechanism; and the right hydraulic handle mechanism controls the right rolling mechanism to rotate through a right hydraulic brake mechanism. Through setting up two sets of mutually independent brake system, stop the left rolling mechanism when needing the left turn, exert oneself to handrail frame a little and realize light left turn, stop the right rolling mechanism and realize the right turn similarly. The structure enables the two-wheeled tractor to turn on site when turning, greatly reduces the space required by turning, and is labor-saving and safe.

Description

Novel power-assisted steering mechanism of two-wheeled tractor

Technical Field

The utility model belongs to the technical field of the two-wheeled tractor, concretely relates to novel two-wheeled tractor's power assisted steering mechanism.

Background

The two-wheel tractor is generally a walking tractor, and has the advantages of small volume, simple structure, low price and flexibility.

The existing two-wheeled tractor can be used in agricultural production and can be changed into a rotary cultivator, a ditcher, a lawn mower, a straw crushing and returning machine and the like after being assembled with tools. However, the farmland road is uneven, and the two-wheeled tractor is difficult to realize turning under the environment.

When the two-wheeled tractor is used as snow removing equipment, a snow sweeper, a snow blower, a snow pushing plate and the like need to be assembled. The working widths of the functional ends are wide, the functional ends are in contact with the ground, and when snow is pushed and shoveled, the two-wheeled tractor is difficult to turn and bend due to the weight of the snow.

And when the existing tractor works in various complex environments after being assembled with equipment, the operation of turning and steering is realized by manual push-pull force, and the turning radius is larger. If the road is on a narrow mountain road, the turning is difficult and the danger is certain.

In addition, the existing tractor adopts a brake mechanism of a hub brake, the brake holding force is not strong, and a brake pad is easy to wear, so that the effect of a brake steering mechanism is not obvious or even fails.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a through setting up two sets of relatively independent hydraulic braking systems for turn to convenient more, laborsaving novel two-wheeled tractor's power assisted steering mechanism.

The purpose of the utility model is realized like this:

a novel power-assisted steering mechanism of a two-wheeled tractor comprises a frame, wherein an engine bracket is arranged on the frame, an engine is arranged in the engine bracket, and a transmission device is arranged on the engine;

a left rolling mechanism and a right rolling mechanism are respectively arranged on two sides of the frame, a left spline shaft is connected between the left rolling mechanism and the transmission device, a right spline shaft is connected between the right rolling mechanism and the transmission device, and the transmission device of the engine drives the left rolling mechanism and the right rolling mechanism through the left spline shaft and the right spline shaft respectively;

the hydraulic auxiliary steering device comprises a left hydraulic brake mechanism, a right hydraulic brake mechanism, a left hydraulic handle mechanism and a right hydraulic handle mechanism; the left hydraulic handle mechanism is connected with a left hydraulic brake mechanism, the left hydraulic brake mechanism is arranged on one side of the left rolling mechanism, and the left hydraulic handle mechanism controls the left rolling mechanism to rotate through the left hydraulic brake mechanism; the right hydraulic handle mechanism is connected with a right hydraulic brake mechanism, the right hydraulic brake mechanism is arranged on one side of the right rolling mechanism, and the right hydraulic handle mechanism controls the right rolling mechanism to rotate through the right hydraulic brake mechanism;

and the frame is provided with a handrail frame for controlling the movement direction of the tractor.

Preferably, the left rolling mechanism is a left wheel or a left crawler belt, the left hydraulic brake mechanism comprises a left brake disc, a left brake shoe block and a left hydraulic oil cylinder, the left brake disc is assembled between the left spline shaft and the left wheel or the left crawler belt, the left brake shoe block is assembled on the left brake disc, the left brake shoe block is provided with the left hydraulic oil cylinder, and the left hydraulic oil cylinder is connected to a left hydraulic cylinder of the left hydraulic handle mechanism through a hydraulic oil pipe.

Preferably, the right rolling mechanism is a right wheel or a right crawler belt, the right hydraulic brake mechanism comprises a right brake disc, a right brake shoe block and a right hydraulic cylinder, the right brake disc is assembled between the right spline shaft and the right wheel or the right crawler belt, the right brake shoe block is assembled on the right brake disc, the right hydraulic cylinder is installed on the right brake shoe block, and the right hydraulic cylinder is connected to a right hydraulic cylinder of the right hydraulic handle mechanism through a hydraulic oil pipe.

Preferably, the left hydraulic brake mechanism further comprises a left shoe block bracket, and the left shoe block bracket is fixedly connected with the left brake shoe block; the right hydraulic brake mechanism further comprises a right shoe block support, and the right shoe block support is fixedly connected with the right brake shoe block.

Preferably, the transmission comprises a worm differential, a clutch and a transmission, and the transmission transmits power to the worm differential through a worm.

Preferably, the worm differential mechanism comprises a worm gear, a bevel gear shaft is assembled on the worm gear, at least one small bevel gear is installed on the bevel gear shaft, a left big bevel gear is connected to one side of the small bevel gear and drives the left spline shaft, a right big bevel gear is connected to the other side of the small bevel gear and drives the right spline shaft.

Preferably, a left bevel gear seat and a right bevel gear seat are arranged on the worm wheel, the left big bevel gear is arranged on one side of the left bevel gear seat, the right big bevel gear is arranged on one side of the right bevel gear seat, the left spline shaft is rigidly connected with the left wheel or the left crawler, and the right spline shaft is rigidly connected with the right wheel or the right crawler.

Preferably, left side hydraulic handle mechanism includes the left hand handle, installs left fixed bolster on the left hand handle, right side hydraulic handle mechanism includes the right hand handle, installs right fixed bolster on the right hand handle, all be provided with stop gear on left side fixed bolster and the right fixed bolster, stop gear can make left hand handle and the right hand handle that shows keep brake state.

Preferably, the limiting mechanism comprises a limiting support, a pin shaft, a return spring and a limiting plate, a pin shaft sleeve is formed on the limiting support, a retaining ring is formed in the pin shaft sleeve, the pin shaft is installed in the pin shaft sleeve, a limiting ring is formed on the pin shaft, the return spring is arranged between the limiting ring and the retaining ring in a pressing mode, a clamping groove is formed in the pin shaft, the limiting plate is installed on the limiting support, and a clamping position matched with the clamping groove is formed in the limiting plate.

Preferably, a torsion spring is arranged between the limiting support and the limiting plate, and the left hydraulic handle mechanism and the right hydraulic handle mechanism are assembled on the armrest frame.

Compared with the prior art, the utility model outstanding and profitable technological effect is:

by arranging two sets of mutually independent brake systems, the left rolling mechanism is braked when the left turn is needed, and the right rolling mechanism is braked similarly to realize the right turn by slightly exerting force on the handrail frame under the force of the right rolling mechanism which is driven by an engine and mutually independent with the left rolling mechanism. And compared with the existing hub brake holding force, the brake steering effect and the reliability are greatly improved. Such structure makes two-wheeled tractor can easily turn to under the ground condition of complicacy after snow removing equipment or agricultural equipment are assembled, unusual convenience, laborsaving.

Drawings

Fig. 1 is a schematic structural view of a two-wheeled tractor according to the present invention.

Fig. 2 is an enlarged view of the right hydraulic handle mechanism of fig. 1 at a.

Fig. 3 is an enlarged view of the left brake shoe of fig. 1 at B.

Fig. 4 is a partial schematic structural diagram of the present invention.

Fig. 5 is a schematic view of a part of the structure of the present invention.

Fig. 6 is a schematic partial cross-sectional view of the present invention.

Fig. 7 is an exploded view of the worm gear differential of the present invention.

Fig. 8 is a schematic view of a part of the structure of the present invention.

Fig. 9 is a schematic structural view of the middle left hydraulic handle mechanism of the present invention.

Fig. 10 is a cross-sectional view of the pin bush and the pin shaft of the present invention.

Fig. 11 is an enlarged schematic view of the clamping member of fig. 4.

Fig. 12 is a schematic structural view of a shoe support.

Reference numerals: 1-a vehicle frame; 2-an engine; 3-an engine mount; 4-handrail frame; 5-left wheel; 6-a left spline shaft; 7-left brake disc; 8-left brake shoe; 9-a left hydraulic cylinder; 26-a left hydraulic cylinder; 5' -right wheel; 6' -right spline shaft; 7' -right brake disc; 8' -right brake shoe; 9' -a right hydraulic ram; 26' -right hydraulic cylinder; 12-a worm gear; 13-bevel gear shaft; 14-a bevel pinion gear; 15-left big bevel gear; 16-left bevel gear seat; 15' -right big bevel gear; 16' -right bevel gear seat; 17-left handle; 18-left fixed support; 17' -right handle; 18' -right fixed bracket; 19-a limit bracket; 20-pin bush; 201-baffle ring; 21-a limiting plate; 211-clamping; 22-a pin shaft; 221-a limit ring; 222-a card slot; 23-a return spring; 24-torsion spring; 27-a worm; 28-left shoe block holder; 29-left axle seat; 30-a clamping member; 28' -right shoe block support; 29' -right axle seat; 31-left handle; 31' -right handle; 32-an oil inlet; 33-oil outlet; 34-arc-shaped groove.

Detailed Description

The following describes the present invention in further detail with reference to the accompanying drawings.

As shown in fig. 1, the novel power-assisted steering mechanism of the two-wheeled tractor comprises a frame 1, wherein an engine bracket 3 is arranged on the front edge of the frame 1, the engine bracket 3 is fixedly connected with the frame 1 through bolts and nuts, an engine 2 is arranged in the engine bracket 3, and a transmission device is arranged on the engine 2. The transmission includes a clutch, a transmission, and a turbine differential.

Clutches are common components in mechanical transmissions and allow the engine to be disengaged or engaged at any time. A transmission is a mechanism for changing the speed and torque from an engine, which can change the ratio of the output shaft to the input shaft, either fixed or in steps, also known as a gearbox. The speed changer consists of a speed change transmission mechanism and an operating mechanism. The differential mechanism can realize a mechanism that the left and right driving wheels rotate at different rotating speeds. The present embodiment is preferably a worm differential, with a worm 27 mounted between the transmission and the worm gear transmission. When the engine 2 is started and power is transmitted to the transmission for speed change, the transmission transmits power to the worm gear differential through the worm 27.

As shown in fig. 4-7, the worm differential includes a worm wheel 12, a bevel gear shaft 13 is mounted in the middle of the worm wheel 12, a small bevel gear 14 is respectively disposed at two ends of the bevel gear shaft 13, and a left big bevel gear 15 and a right big bevel gear 15' are engaged at two sides of the small bevel gear 14. A left bevel gear seat 16 is mounted on one side of the worm wheel 12, the left bevel gear seat 16 is fixed with the worm wheel 12 through a nut and bolt, a left big bevel gear 15 is mounted on the left bevel gear seat 16, the left bevel gear seat 16 limits axial movement of the left big bevel gear 15, and the left big bevel gear 15 is fixedly connected with the left spline shaft 6; the other side of the worm wheel 12 is provided with a right bevel gear seat 16 ', and the right bevel gear seat 16' is fixed with the worm wheel 12 through a nut and a bolt. The right bevel gear seat 16 'is provided with a right big bevel gear 15', the right bevel gear seat 16 'limits the axial movement of the right big bevel gear 15', and the right big bevel gear 15 'is fixedly connected with the right spline shaft 6'. The left spline shaft 6 and the right spline shaft 6' are not integrated. The left spline shaft 6 is rigidly connected with the left wheel 5 through a bolt, and the right spline shaft 6 'is rigidly connected with the right wheel 5' through a bolt. Thus, the left spline shaft 6 and the left wheel 5, and the right spline shaft 6 'and the right wheel 5' can rotate simultaneously.

The frame 1 is provided with an auxiliary steering device which comprises a left hydraulic brake mechanism, a right hydraulic brake mechanism, a left hydraulic handle mechanism and a right hydraulic handle mechanism.

The left hydraulic brake mechanism is located on one side of the left wheel 5 and comprises a left brake disc 7, a left brake shoe 8 and a left hydraulic oil cylinder 9, the left brake disc 7 is assembled between the left spline shaft 6 and the left wheel 5, the left brake disc 7 is rigidly connected with the left wheel 5, so that the left brake disc 7 and the left wheel 5 can rotate together, the left brake shoe 8 is assembled on the left brake disc 7, and the left brake shoe 8 is fixedly connected to a left shoe support 28 through bolts. The left shoe support 28 is fixedly connected with a left wheel axle seat 29, and the left brake shoe 29 is firmly fixed on the left brake disc 7, so that the stability is enhanced, and the left brake shoe 29 is prevented from longitudinally moving. The shoe support is constructed as shown in fig. 12. The shoe block bracket is provided with two arc-shaped grooves, so that the shoe block bracket can be conveniently arranged on a shaft, and the occupied space is reduced. One side of the shoe block bracket is fixedly connected with the brake shoe block through a bolt, and the other side of the shoe block bracket is fixedly connected with the axle seat through a bolt. The left axle seat 29 is fixedly arranged on the transmission. Two opposite clamping members 30 are mounted on the left brake shoe 8, and the left brake disc 7 is located between the two clamping members 30. And a left hydraulic oil cylinder 9 is arranged on the left brake shoe block 8, and the left hydraulic oil cylinder 9 is connected to a left hydraulic cylinder 26 of the left hydraulic handle mechanism through a hydraulic oil pipe.

The right hydraulic brake mechanism is located on one side of the right wheel 5 ', and comprises a right brake disc 7 ', a right brake shoe 8 ' and a right hydraulic oil cylinder 9 ', the right brake disc 7 ' is assembled between the right spline shaft 6 ' and the right wheel 5 ', the right brake disc 7 ' is rigidly connected with the right wheel 5 ', so that the right brake disc 7 ' and the right wheel 5 ' rotate together, the right brake shoe 8 ' is assembled on the right brake disc 7 ', and the right brake shoe 8 ' is fixedly connected to the right shoe support 28 ' through a bolt. The right shoe block bracket 28 'is fixedly connected with a right axle seat 29', and the right brake shoe block 29 is firmly fixed on the right brake disc 7, so that the stability is enhanced, and the longitudinal movement of the right brake shoe block 29 is prevented. The right axle seat 29' is fixedly mounted on the transmission. The right brake shoe 8 'has two opposing clamping members 30 mounted thereon, as shown in fig. 11, and the right brake disc 7' is located between the two clamping members 20. The right brake shoe block 8 'is provided with a right hydraulic oil cylinder 9', and the right hydraulic oil cylinder 9 'is connected to a right hydraulic cylinder 26' of the right hydraulic handle mechanism through a hydraulic oil pipe. Oil inlets 32 are formed in the left hydraulic oil cylinder 9 and the right hydraulic oil cylinder 9 ', and oil outlets 33 are formed in the left hydraulic cylinder 26 and the right hydraulic cylinder 26'. One end of the hydraulic oil pipe is connected with the oil outlet 33, and the other end of the hydraulic oil pipe is connected with the oil inlet 32. As shown in fig. 2 and 3.

Drum brakes and disc brakes are currently popular braking methods. The hydraulic brake system is an indispensable part for realizing disc braking. The hydraulic braking system comprises a hydraulic cylinder, a hydraulic oil pipe, a hydraulic oil cylinder and the like. The working principle of the hydraulic braking system is as follows: according to the equal everywhere of the pressure in the liquid, a closed pipeline is connected with a hydraulic pump, when the pressure of a brake master pump acts on brake fluid, the liquid is incompressible, the pressure is transmitted to a brake branch pump, two pistons in the branch pump extend to two sides under the action of the pressure of the liquid, and a brake pad and a brake disc are pushed to generate braking force. The present embodiment is preferably a disc brake. Through setting up two sets of relatively independent disk brake system, realize two-wheeled tractor's power assisted steering and brake, the effect is good. The disc brake uses the brake caliper to control two brake pads to clamp the brake disc on the wheel. When the brake plate clamps the disk, friction is generated between the brake plate and the disk. When the brake handle is pressed, a piston in the master cylinder is pushed, and pressure is built up in the brake oil path. The pressure is transmitted to the piston of the wheel cylinder on the brake caliper through the brake oil, and the piston of the wheel cylinder can move outwards and push the brake pad to clamp the brake disc after being pressurized, so that the brake pad and the brake disc are rubbed to reduce the rotating speed of the wheel and the automobile can be well decelerated or stopped. The heat dissipation of the disc brake is better than that of the drum brake, and the phenomenon that the brake is declined to cause brake failure is avoided when the brake is continuously stepped. The change in size of the brake disc after heating does not increase the stroke of stepping on the brake pedal. The disc type brake system has quick response and can perform high-frequency brake action, thereby meeting the requirements of an ABS system. The disc brake does not have the automatic braking function of the drum brake, so that the braking force of the left wheel and the right wheel is relatively even. Because the water drainage of the brake disc is better, the situation of bad braking caused by water or silt can be reduced. The disc brake has a simple structure and is easily maintained, compared to the drum brake.

The left hydraulic handle mechanism is connected with a left hydraulic brake mechanism, and the left hydraulic handle mechanism controls the left wheel 5 to rotate through the left hydraulic brake mechanism.

The right hydraulic handle mechanism is connected with the right hydraulic brake mechanism, the right hydraulic brake mechanism is arranged on one side of the right wheel, and the right hydraulic handle mechanism is controlled by the right hydraulic brake mechanism to rotate the right wheel.

As shown in fig. 1 and 8, the frame 1 is provided with the handrail frame 4 for controlling the movement direction of the tractor, and the handrail frame 4 is fixedly connected with the frame 1, so that the movement direction of the vehicle can be changed conveniently by applying force on the handrail frame 4 in the movement process of the vehicle, and the labor is saved. Be provided with left handle 31 and right handle 31 ' on handrail frame 4, left side handle 31 with be equipped with left fixed bolster 18 and right fixed bolster 18 ' on the right handle 31 ' respectively, left side hydraulic handle mechanism with right hydraulic handle mechanism all sets up on left fixed bolster 18 and right fixed bolster 18 ', left side hydraulic handle mechanism includes left handle 17, and left handle 17 installs on left fixed bolster 18, right side hydraulic handle mechanism includes right handle 17 ', and right handle 17 ' installs on right fixed bolster 18 '.

And the left fixing support 18 and the right fixing support 18 'are both provided with limiting mechanisms, and the limiting mechanisms can enable the left handle 17 and the right handle 17' to keep a braking state.

As shown in fig. 9, the limiting mechanism includes a limiting bracket 19, a pin 22, a return spring 23 and a limiting plate 21, the limiting bracket 19 is fixedly mounted on the fixing bracket through a bolt, the limiting bracket 19 extends toward the handle, one part of the limiting bracket is suspended, and a pin bushing 20 for limiting the lateral movement of the pin 22 is formed on the suspended side of the limiting bracket 19. As shown in fig. 10. A retaining ring 201 is formed in the pin shaft sleeve 20, the pin shaft 22 is installed in the pin shaft sleeve 20, the pin shaft 22 penetrates through the whole pin shaft sleeve 20, and the retaining ring 201 prevents the pin shaft 22 from being separated from the pin shaft sleeve 20. The pin 22 is formed with a limit ring 221 which is matched with the stop ring 201. A return spring 23 is installed in the pin shaft sleeve 20, and the return spring 23 is pressed between the limit ring 221 and the baffle ring 201. The end of the pin 22 extending out of the pin sleeve 20 is provided with a slot 222. And a limiting plate 21 is arranged on the limiting bracket 19, and the limiting plate 21 can rotate freely. The position-limiting plate 21 is provided with a position-limiting portion 211 matched with the position-limiting groove 222. When the position-limiting part 211 is attached to the slot 222, the pin 22 is effectively prevented from moving up and down, thereby achieving the effect of locking.

And a torsion spring 24 is arranged between the limiting bracket 19 and the limiting plate 21. One end of the torsion spring 24 hooks the bolt for fixing the limiting bracket 19, and the other end hooks the side of the limiting plate 21 without the clamping position 211. When the pin 22 is not yet pressed, the stopper plate 21 abuts against the pin 22. When the pin 22 is pressed, the slot 222 of the pin 22 is lowered. When the slot 222 and the position-limiting member 211 are in the same plane, the position-limiting plate 21 will be locked in the slot 222 due to the restoring force of the torsion spring 24.

The specific working process of the scheme is as follows:

when the engine 2 is started to generate power, the power is transmitted to the worm gear differential through the worm 27 after being changed in speed through the clutch and the transmission, the worm gear 27 on the worm gear differential rotates, and meanwhile, the two small bevel gears 14 assembled in the worm gear 27 rotate together by taking the middle point of the bevel gear shaft 13 as a circle center. During the rotation, since the left big bevel gear 15 ' and the right big bevel gear 15 ' are engaged with the small bevel gear 14, the left big bevel gear 15 ' and the right big bevel gear 15 ' also rotate, thereby respectively driving the left spline shaft 6 and the right spline shaft 6 ' to rotate. So that when the left and right spline shafts 6, 6 'are driven, the left and right wheels 5, 5' also rotate together. And at the same time rotates with the left brake disc 7 fixedly mounted on the left wheel 5 and the right brake disc 7 'fixedly mounted on the right wheel 5'.

When the bicycle is required to rotate to the left, the left handle 17 is pressed down, the two clamping pieces 30 on the left brake shoe block 8 are controlled to move relatively through the hydraulic system until the left brake disc 7 is tightly attached, and the rotating speed of the left brake disc 7 is reduced by means of the friction force generated by the clamping pieces 30 and the brake disc, so that the rotating speed of the left wheel 5 is reduced. The tighter the two clamping members 30 are in abutment with the left brake disc 7 until the left brake disc 7 is no longer rotating. When the left wheel 5 is not rotated any more, it corresponds to a brake lock state. The left spline shaft 6 and the left big bevel gear 15 connected with the left wheel 5 are also in a locking state at the same time. Since the left big bevel gear 15 does not rotate any more, the small bevel gear 14 engaged with the left big bevel gear 15 starts to rotate, and the rotation direction of the small bevel gear 14 just fits with the rotation direction of the right big bevel gear 15 'in the rotation process, so that the driving of the right big bevel gear 15' is not hindered. Since the right wheel 5' is not affected when the left wheel 5 is locked. At this time, the left handle 17 is not held, the right handle 31' is forced to rotate by the power generated by the power generation, the left wheel 5 is used as a fixed point, and the whole vehicle is steered by the rotation angle according to the requirement of the user.

The same reason for right turn is realized. The right handle 17 'is held and the left handle 31 is forced to steer the whole vehicle by the power generated by the power generation and taking the right wheel 5' as a fixed point. By arranging two sets of mutually independent brake systems, the space required by the steering of the two-wheeled tractor is effectively reduced, the two-wheeled tractor is convenient and labor-saving, and the two-wheeled tractor can adapt to various operating environments.

When the parking state of the whole tractor is realized, the pin shaft 22 on the left handle and the right handle is only needed to be pressed. Because the torsion spring 24 has a reset force, when the limiting mechanism is not in the parking state. One end of the limit plate 21 is abutted against the pin 22. The lower end of the pin 22 does not touch the handle. When the latch slot 222 and the latch 211 are in the same plane during the downward movement of the pin 22, the latch 211 is locked in the latch slot 222 by the restoring force of the torsion spring 24, so as to lock the pin 22. At this time, the lower end of the pin 22 just props against the handle, and the reset state of the handle after being pinched is blocked, so that the handle is always kept in the pinching state, and the whole vehicle is kept in the braking state.

As the pin 22 is depressed, the inner return spring 23 is compressed, generating a return force. To release the parking state, the user merely pinches the handle and releases the handle from contact with the lower end of the pin 22. Then, the position-limiting plate 21 is pulled out, so that the position-limiting plate 21 is separated from the card slot 222. So that the pin 22 is moved upward to the home position by the return spring 23. At this time, the lower end of the pin 22 does not limit the movement of the handle, thereby releasing the long-term braking state.

The second embodiment is as follows:

the present embodiment is substantially the same as the first embodiment, and is different in that the rolling mechanism is preferably a crawler, and the crawler increases the contact area between the two-wheeled tractor and the ground, is not easy to slip, and is very easy to adapt to various terrains. In addition, the effect of hydraulic power steering is enhanced.

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

Claims

1. The utility model provides a novel two-wheeled tractor's power assisted steering mechanism which characterized in that:

the motorcycle frame comprises a frame (1), wherein an engine bracket (3) is arranged on the frame (1), an engine (2) is arranged in the engine bracket (3), and a transmission device is arranged on the engine (2);

a left spline shaft (6) is connected between the left rolling mechanism and the transmission device, a right spline shaft (6 ') is connected between the right rolling mechanism and the transmission device, and the transmission device of the engine (2) drives the left rolling mechanism and the right rolling mechanism respectively through the left spline shaft (6) and the right spline shaft (6');

the hydraulic auxiliary steering device is arranged on the frame (1) and comprises a left hydraulic brake mechanism, a right hydraulic brake mechanism, a left hydraulic handle mechanism and a right hydraulic handle mechanism; the left hydraulic handle mechanism is connected with a left hydraulic brake mechanism, the left hydraulic brake mechanism is arranged on one side of the left rolling mechanism, and the left hydraulic handle mechanism controls the left rolling mechanism to rotate through the left hydraulic brake mechanism; the right hydraulic handle mechanism is connected with a right hydraulic brake mechanism, the right hydraulic brake mechanism is arranged on one side of the right rolling mechanism, and the right hydraulic handle mechanism controls the right rolling mechanism to rotate through the right hydraulic brake mechanism;

the frame (1) is provided with a handrail frame (4) for controlling the movement direction of the tractor.

2. The power steering mechanism of a novel two-wheeled tractor according to claim 1, characterized in that: the left rolling mechanism is a left wheel (5) or a left crawler belt, the left hydraulic brake mechanism comprises a left brake disc (7), a left brake shoe block (8) and a left hydraulic oil cylinder (9), the left brake disc (7) is assembled between the left spline shaft (6) and the left wheel (5) or the left crawler belt, the left brake shoe block (8) is assembled on the left brake disc (7), the left hydraulic oil cylinder (9) is installed on the left brake shoe block (8), and the left hydraulic oil cylinder (9) is connected to a left hydraulic cylinder (26) of the left hydraulic handle mechanism through a hydraulic oil pipe.

3. The power steering mechanism of a novel two-wheeled tractor according to claim 2, characterized in that: the right rolling mechanism is a right wheel (5 ') or a right crawler belt, the right hydraulic brake mechanism comprises a right brake disc (7 '), a right brake shoe (8 ') and a right hydraulic oil cylinder (9 '), the right brake disc (7 ') is assembled between the right spline shaft (6 ') and the right wheel (5 ') or the right crawler belt, the right brake shoe (8 ') is assembled on the right brake disc (7 '), the right brake shoe (8 ') is provided with the right hydraulic oil cylinder (9 '), and the right hydraulic oil cylinder (9 ') is connected to a right hydraulic cylinder (26 ') of the right hydraulic handle mechanism through a hydraulic oil pipe.

4. The power steering mechanism of a novel two-wheeled tractor according to claim 3, characterized in that: the left hydraulic brake mechanism further comprises a left shoe block support (28), and the left shoe block support (28) is fixedly connected with the left brake shoe block (8); the right hydraulic brake mechanism further comprises a right shoe block support (28), and the right shoe block support (28) is fixedly connected with the right brake shoe block (8).

5. The power steering mechanism of a novel two-wheeled tractor according to claim 3, characterized in that: the transmission device comprises a worm gear differential, a clutch and a speed changer, and the speed changer transmits power to the worm gear differential through a worm (27).

6. The power steering mechanism of a novel two-wheeled tractor according to claim 5, characterized in that: the worm wheel differential mechanism comprises a worm wheel (12), a bevel gear shaft (13) is assembled on the worm wheel (12), at least one small bevel gear (14) is installed on the bevel gear shaft (13), one side of the small bevel gear (14) is connected with a left big bevel gear (15), the left big bevel gear (15) drives the left spline shaft (6), the other side of the small bevel gear (14) is connected with a right big bevel gear (15 '), and the right big bevel gear (15 ') drives the right spline shaft (6 ').

7. The power steering mechanism of a novel two-wheeled tractor according to claim 6, characterized in that: the worm wheel (12) is provided with a left bevel gear seat (16) and a right bevel gear seat (16 '), the left big bevel gear (15) is arranged on one side of the left bevel gear seat (16), the right big bevel gear (15 ') is arranged on one side of the right bevel gear seat (16 '), the left spline shaft (6) is rigidly connected with the left wheel (5) or the left crawler belt, and the right spline shaft (6 ') is rigidly connected with the right wheel (5 ') or the right crawler belt.

8. A novel power steering mechanism for a two-wheeled tractor according to claim 1 or 2, wherein: left side hydraulic handle mechanism includes left handle (17), installs left fixed bolster (18) on left handle (17), right side hydraulic handle mechanism includes right handle (17 '), installs right fixed bolster (18 ') on right handle (17 '), all be provided with stop gear on left side fixed bolster (18) and right fixed bolster (18 '), stop gear can make left handle (17) and right handle (17 ') that shows keep brake state.

9. The power steering mechanism of a novel two-wheeled tractor according to claim 8, wherein: stop gear includes spacing support (19), round pin axle (22), reset spring (23) and limiting plate (21), the shaping has round pin axle sleeve (20) on spacing support (19), and the shaping has fender ring (201) in round pin axle sleeve (20), install round pin axle (22) in round pin axle sleeve (20), the shaping has spacing ring (221) on round pin axle (22), reset spring (23) are pressed and are located spacing ring (221) and keep off between ring (201), draw-in groove (222) have been seted up on round pin axle (22), install limiting plate (21) on spacing support (19), seted up on limiting plate (21) with draw-in groove (222) matched with screens (211).

10. The power steering mechanism of a novel two-wheeled tractor according to claim 9, wherein: be equipped with torsional spring (24) between spacing support (19) and limiting plate (21), left side hydraulic handle mechanism with right side hydraulic handle mechanism all assembles in handrail frame (4).