CN210235084U

CN210235084U - Front wheel steering mechanism of lawn vehicle

Info

Publication number: CN210235084U
Application number: CN201921136340.1U
Authority: CN
Inventors: Xuzhong Zheng; 郑旭忠
Original assignee: Yangzhou Weibang Garden Machine Co Ltd
Current assignee: Yangzhou Weibang Garden Machine Co Ltd
Priority date: 2019-07-19
Filing date: 2019-07-19
Publication date: 2020-04-03
Anticipated expiration: 2029-07-19

Abstract

The utility model relates to a lawn mower front wheel steering mechanism, the steering gear both sides are equipped with the bulb actuating arm respectively, the outer end of two bulb actuating arms articulates respectively has the steering gear drive round, the cross axle outer end at L shape front wheel axle is fixed to the front wheel, both ends symmetric welding has the vertical axis bearing frame about the front wheel frame crossbeam, the upper and lower both ends of vertical axis bearing frame are inlayed respectively and are equipped with the nylon bearing, the bottom of lower nylon bearing supports the horizontal limit top at L shape bogie through flat gasket, the vertical limit lower edge pressure of L shape bogie is on the cross axle of front wheel axle, the horizontal limit that the vertical axis of L shape front wheel axle upwards passed L shape bogie is fixed in the nylon bearing, the steering gear drive round pin articulates in the steering gear hinge hole at the horizontal limit rear portion of L shape bogie. The rear sides of the transverse edges of the two L-shaped bogies are provided with bogie limiting arcs, and the front sides of the front wheel frame beams are welded with bogie stop blocks; when the front wheel is close to the dead point, the bogie limiting arcs respectively lean against the bogie stop blocks. The mechanism makes the turning radius of the front wheel small and does not cross the dead point.

Description

Front wheel steering mechanism of lawn vehicle

Technical Field

The utility model relates to a lawn car especially relates to a lawn car front wheel turns to mechanism, belongs to lawn car and turns to technical field.

Background

Due to the demand of urban greening, the lawn coverage rate is higher and higher, including the establishment of an artificial lawn planting industrial chain, and large and medium-sized lawn trimming equipment is more and more widely applied to places such as parks, courts, lawn bases and the like. The lawn car comprises a frame chassis, an engine is mounted on the frame chassis, a mowing cutter head is mounted below the frame chassis, and blades capable of rotating at a high speed are arranged on the mowing cutter head.

When grass is cut on a grassland with obstacles, the turning radius of the lawn vehicle is required to be as small as possible, so that the grass beside the obstacles can be cut more conveniently. When the front wheel turning angle is large and close to the dead point position, if the front wheel turning angle meets a ground pit, the front wheel is easy to fall into the pit so that the front wheel is forced to twist over the dead point, and at the moment, the front wheel cannot be reset through a steering wheel and a steering machine. The operator can only force the front wheel to reset over the dead point again in a kick-type mode, and the damage to the steering gear is easily caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the problem that exists among the prior art, provide a lawn front wheel steering mechanism, front wheel steering is nimble and turning radius is little, is convenient for cut the peripheral grass of barrier.

In order to solve the technical problem, the utility model discloses a lawn vehicle front wheel steering mechanism, which comprises a front wheel, a front wheel frame beam and a steering machine, wherein the left side and the right side of the steering machine are respectively provided with ball head driving arms extending outwards, the outer ends of the two ball head driving arms are respectively hinged with a steering machine driving pin, the hub center of the front wheel is respectively fixed on the outer end of the cross shaft of the L-shaped front wheel shaft, the left end and the right end of the front wheel frame beam are symmetrically welded with vertical shaft bearing blocks, the upper end and the lower end of each vertical shaft bearing block are respectively embedded with an upper nylon bearing and a lower nylon bearing, the bottom of the lower nylon bearing is supported above the cross edge of the L-shaped bogie through a flat gasket, the lower edge of the vertical edge of the L-shaped bogie is pressed on the cross shaft of the front wheel shaft, the vertical shaft of the L-shaped front wheel shaft upwards passes through the cross edge of the L-shaped bogie and, the steering gear driving pins are respectively hinged in the steering gear hinge holes.

Compared with the prior art, the utility model discloses following beneficial effect has been obtained: the steering wheel drives the steering machine input shaft to rotate through the steering wheel central shaft and the universal joint, the steering machine drives the ball head driving arms on the left side and the right side to extend or retract, and the driving pins of the steering machine drive the L-shaped bogie to rotate around the vertical shaft of the L-shaped front wheel shaft, so that the front wheels are steered. The distance between the center line of the steering gear driving pin and the vertical shaft axis of the L-shaped front wheel shaft is the turning radius, so that the steering of the front wheel is very flexible, the turning radius is very small, and grass on the periphery of a small obstacle can be cut off conveniently.

As an improvement of the utility model, the rear sides of the transverse edges of the two L-shaped bogies are provided with bogie limiting arcs which extend in opposite directions, and bogie stop blocks which extend downwards are symmetrically welded at the positions of the bottom of the front wheel frame crossbeam, which are close to the vertical shaft bearing seats; when the front wheel is close to the dead point, the two bogie limiting arcs respectively lean against the corresponding bogie stop blocks. When the vertical shaft axis of the L-shaped front wheel shaft, the center line of the driving pin of the steering gear and the ball head driving arm are positioned in the same plane, the front wheel is positioned at a dead point. The utility model discloses before the front wheel reaches dead point position, the spacing arc of bogie supports promptly and leans on the bogie dog, prevents L shape bogie to continue to rotate to the dead point, has avoided the front wheel to cross the dead point promptly, has improved the reliability when the operation of mowing greatly.

As a further improvement, the lower edge of the vertical edge of the L-shaped bogie is provided with a semicircular groove, and the cross shaft of the front axle is embedded in the semicircular groove. The vertical edge of the L-shaped bogie is clamped on the cross shaft of the front wheel shaft, so that the steering of the front wheel is more reliable.

Drawings

Fig. 1 is a first perspective view of the front wheel steering mechanism of the lawn mower of the present invention.

Fig. 2 is a second perspective view of the front wheel steering mechanism of the lawn mower of the present invention.

Fig. 3 is a front view of the steering gear box of fig. 1.

Fig. 4 is an exploded view of fig. 1 with the steering gear removed.

Fig. 5 is a schematic view of the bogie limit arc abutting against a bogie stop to achieve a limit.

In the figure: 1. a front wheel frame beam; 1a, a vertical shaft bearing seat; 2. mounting a nylon bearing; 3. a lower nylon bearing; 4. a flat gasket; an L-shaped front axle; 6. a steering gear; 6a. a ball head driving arm; 6b. a steering gear driving pin; an L-shaped bogie; 7a, a steering gear hinge hole; 7b, bogie limit arc; 8. a bogie stop; 9. a front wheel; 9a, a hub; 10. a steering wheel; 11. a steering wheel center shaft; 12. a universal joint; 13. the steering gear input shaft.

Detailed Description

As shown in fig. 1 to 4, the lawn vehicle front wheel steering mechanism of the present invention comprises a front wheel 9, a front wheel frame beam 1 and a steering gear 6, wherein the left and right sides of the steering gear 6 are respectively provided with a ball head driving arm 6a extending outwards, the outer ends of the two ball head driving arms 6a are respectively hinged with a steering gear driving pin 6b, the center of a wheel hub 9a of the front wheel 9 is respectively fixed at the outer end of a cross shaft of an L-shaped front wheel shaft 5, vertical shaft bearing blocks 1a are symmetrically welded at the left and right ends of the front wheel frame beam 1, the upper and lower ends of the vertical shaft bearing blocks 1a are respectively embedded with an upper nylon bearing 2 and a lower nylon bearing 3, the bottom of the lower nylon bearing 3 is supported above the transverse edge of the L-shaped bogie 7 through a flat gasket 4, the lower edge of the vertical edge of the L-shaped bogie 7 is pressed on the cross shaft of the front wheel shaft, the vertical shaft of the L-shaped front wheel shaft 5 penetrates the transverse edge of, the rear part of the transverse edge of the L-shaped bogie 7 is provided with a steering gear hinging hole 7a, and steering gear driving pins 6b are respectively hinged in the steering gear hinging holes 7a.

The steering wheel 10 drives the steering machine input shaft 13 to rotate through the steering wheel central shaft 11 and the universal joint 12, the steering machine 6 drives the ball head driving arms 6a on the left side and the right side to extend or retract, and the steering machine driving pins 6b pull the L-shaped bogie 7 to rotate around the vertical shaft of the L-shaped front wheel shaft 5, so that the front wheels 9 are steered. The distance between the center line of the steering gear driving pin 6b and the vertical shaft axis of the L-shaped front wheel shaft 5 is the turning radius, so that the front wheel 9 is very flexible in steering and small in turning radius, and grass around small obstacles can be cut off conveniently.

The lower edge of the vertical edge of the L-shaped bogie 7 is provided with a semicircular groove, and the transverse shaft of the front wheel shaft is embedded in the semicircular groove. The vertical edge of the L-shaped bogie 7 is clamped on the horizontal shaft of the front wheel shaft, so that the steering of the front wheel 9 is more reliable.

The rear sides of the transverse edges of the two L-shaped bogies 7 are provided with bogie limiting arcs 7b which extend in opposite directions, and downwardly extending bogie stop blocks 8 are symmetrically welded at the positions, close to the vertical shaft bearing seat 1a, of the bottom of the front wheel frame crossbeam 1; when the front wheel 9 is close to the dead point, the two bogie limiting arcs 7b are respectively abutted against the corresponding bogie stop blocks 8.

As shown in fig. 5, when the vertical axis of the L-shaped front wheel shaft 5, the centerline of the steering gear driving pin 6b and the axis of the ball head driving arm 6a are in the same plane, the front wheel 9 is at the dead point position. The utility model discloses before the front wheel 9 reachs the dead point position, the spacing arc 7b of bogie supports promptly and leans on bogie dog 8, prevents L shape bogie 7 to continue to rotate to the dead point, has avoided the front wheel 9 to cross the dead point promptly, has improved the reliability when the operation of mowing greatly.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention. In addition to the above embodiments, the present invention may have other embodiments. All the technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope claimed by the present invention. The undescribed technical features of the present invention can be realized by or using the prior art, and are not described herein again.

Claims

1. The utility model provides a lawn front wheel steering mechanism, includes front wheel, front wheel carrier crossbeam and direction machine, and the left and right sides of direction machine is equipped with the bulb actuating arm that outwards stretches out respectively, and the outer end of two bulb actuating arms articulates respectively has direction machine drive round pin, and the outer end of cross axle at L shape front wheel axle is fixed respectively at the wheel hub center of front wheel, its characterized in that: the steering mechanism is characterized in that vertical shaft bearing seats are symmetrically welded at the left end and the right end of a cross beam of the front wheel frame, an upper nylon bearing and a lower nylon bearing are respectively embedded at the upper end and the lower end of each vertical shaft bearing seat, the bottom of each lower nylon bearing is supported above the transverse edge of the L-shaped bogie through a flat gasket, the lower edge of the vertical edge of the L-shaped bogie is pressed on the transverse shaft of the front wheel shaft, the vertical shaft of the L-shaped front wheel shaft upwards penetrates through the transverse edges of the L-shaped bogie and is fixed in the central holes of the upper nylon bearing and the lower nylon bearing, steering mechanism hinge holes are formed in the rear parts of the transverse edges of the L-shaped.

2. A lawn front wheel steering mechanism as claimed in claim 1, wherein: the rear sides of the transverse edges of the two L-shaped bogies are provided with bogie limiting arcs which extend out in opposite directions, and bogie stop blocks which extend downwards are symmetrically welded at the positions, close to the vertical shaft bearing seats, of the bottoms of the front wheel frame cross beams; when the front wheel is close to the dead point, the two bogie limiting arcs respectively lean against the corresponding bogie stop blocks.

3. A lawn front wheel steering mechanism as claimed in claim 1 or 2, wherein: the lower edge of the vertical edge of the L-shaped bogie is provided with a semicircular groove, and the transverse shaft of the front wheel shaft is embedded in the semicircular groove.