CN217694253U - Steering mechanism of riding mower - Google Patents

Abstract

The utility model relates to a ride and take advantage of lawn mower steering mechanism, include: one end of the steering shaft is connected with the steering wheel, the other end of the steering shaft is rotatably connected with the rack, and a steering gear is coaxially arranged; the steering plate is rotatably connected to the rack, an arc-shaped tooth part meshed with the steering gear is arranged on the steering plate, and the circle center of the arc-shaped tooth part is positioned at the rotating center of the steering plate; the first steering knuckle and the second steering knuckle are rotatably connected to the rack and synchronously rotate relative to the rack through a linkage structure; the steering knuckle arm is connected with the first steering knuckle and synchronously rotates relative to the rack; and one end of the connecting rod is hinged with one end of the steering plate, which is far away from the arc-shaped tooth part, and the other end of the connecting rod is hinged with the rotating far end of the knuckle arm. According to the arrangement, the combination of a pure mechanical structure of the steering wheel, the steering shaft, the steering plate, the connecting rod and the steering knuckle arm is adopted, the rotation operation of the steering wheel is directly transmitted to the steering wheel, so that the steering is realized, and the steering device is simple and compact in structure, high in reliability and low in cost.

Description

Steering mechanism of riding mower

Technical Field

The utility model relates to a mechanical steering system technical field, more specifically say, relate to a take advantage of and take advantage of lawn mower steering mechanism.

Background

Mechanical steering systems use the driver's physical strength as the steering energy source, where all force transmitting members are mechanical. The mechanical steering system consists of three parts, namely a steering control mechanism, a steering gear and a steering transmission mechanism.

Riding lawn mowers, also known as riding lawn mowers, are large mechanical tools used for trimming lawns and vegetation, and have wide application in real life. The application of the mower not only saves a large amount of labor time, but also can be more beautiful after lawn trimming, and is a very practical mechanical tool. The machine belongs to a riding garden mower and has the characteristics of low speed, low torque, small size and the like. If a conventional steering system is used, it takes up space, is costly, and is not suitable for use on such machines.

SUMMERY OF THE UTILITY MODEL

For overcoming the problem that exists in the correlation technique to a certain extent at least, the utility model aims to provide a take advantage of and take advantage of lawn mower steering mechanism, it possesses simple structure, compactness, and the reliability is high, low cost etc.. The utility model provides a plurality of technical effects that preferred technical scheme among a great deal of technical scheme can produce see the explanation below in detail.

The utility model provides a ride and take advantage of lawn mower steering mechanism, include:

one end of the steering shaft is connected with the steering wheel, the other end of the steering shaft is rotatably connected with the rack, and a steering gear is coaxially arranged;

the steering plate is rotatably connected to the rack, an arc tooth part meshed with the steering gear is arranged on the steering plate, and the circle center of the arc tooth part is positioned at the rotating center of the steering plate;

the first steering knuckle and the second steering knuckle are rotatably connected to the rack and synchronously rotate relative to the rack through a linkage structure;

a knuckle arm connected to the first knuckle and rotating synchronously with respect to the frame;

and one end of the connecting rod is hinged with one end of the steering plate, which is far away from the arc-shaped tooth part, and the other end of the connecting rod is hinged with the rotating far end of the knuckle arm.

Preferably, the linkage structure includes:

the first linkage arm is connected with the first steering knuckle and synchronously rotates relative to the rack;

the second linkage arm is connected with the second steering knuckle and synchronously rotates relative to the rack;

and two ends of the transverse pull rod are respectively hinged with the rotating far ends of the first linkage arm and the second linkage arm.

Preferably, a first steering sleeve and a second steering sleeve are arranged on the frame, the first steering knuckle is rotatably connected to the first steering sleeve through a first rotating shaft, and the second steering knuckle is rotatably connected to the second steering sleeve through a second rotating shaft.

Preferably, the knuckle arm and the first linkage arm are both connected to the first rotating shaft and are respectively located at two ends of the first steering sleeve.

Preferably, the steering shaft is arranged obliquely with respect to a plane in which the steering plate is located, and the steering gear is arranged as a helical gear.

Preferably, the steering gear is provided as a helical cylindrical gear, and the arc-shaped teeth are provided as involute gears.

Preferably, a limiting structure for limiting the rotation angle of the steering plate is arranged between the steering plate and the rack.

Preferably, the limit structure includes a sliding groove and a sliding block slidably disposed in the sliding groove, one of the sliding groove and the sliding block is disposed in the frame, the other one is disposed in the steering plate, and the sliding groove is disposed in an arc shape with a rotation center of the steering plate being circular.

Preferably, the steering gear is mounted to the frame by a pressure plate.

Preferably, both ends of the tie rod are connected with the first linkage arm and the second linkage arm through ball connection structures.

The utility model provides a technical scheme can include following beneficial effect:

when the automobile steers, the steering torque applied to the steering wheel by a driver is output to the steering gear through the steering shaft and is output to the steering plate through the arc-shaped tooth part, the torque is amplified through the arc-shaped tooth part and is decelerated, the steering plate rotates to drive the pull rod to displace, the steering knuckle arm is pulled to rotate, and meanwhile the first steering knuckle and the second steering knuckle synchronously rotate under the action of the linkage structure, so that the left steering wheel and the right steering wheel synchronously deflect. The steering mechanism has the advantages of simple structure, light weight, easiness in manufacturing, low cost, high transmission efficiency, sensitivity in steering and no need of adjusting the meshing clearance. Because it simplifies the steering transmission structure, it is very suitable for riding mower low speed, low torque, small volume and light weight.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a perspective view of the present ride-on lawn mower steering mechanism, shown in accordance with some exemplary embodiments;

fig. 2 is a top view of the present ride-on mower steering mechanism, shown in accordance with some exemplary embodiments;

FIG. 3 is a block diagram illustrating a drive connection of a steering shaft and a steering plate according to some exemplary embodiments;

FIG. 4 is a diagram illustrating a connection of a steering shaft to a frame, according to some exemplary embodiments.

In the figure: 1. a steering wheel; 2. a steering shaft; 3. a steering plate; 4. a connecting rod; 5. a knuckle arm; 6. a first steering knuckle; 7. a first linkage arm; 8. a tie rod; 9. a second linkage arm; 10. a second knuckle; 11. a steering gear; 12. a chute; 13. a frame; 14. and (7) pressing a plate.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatus or methods consistent with certain aspects of the present invention.

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Hereinafter, embodiments will be described with reference to the drawings. The embodiments described below do not limit the scope of the invention described in the claims. Further, the entire contents of the configurations shown in the following embodiments are not limited to those necessary as a solution of the invention described in the claims.

Referring to fig. 1-4, the present embodiment provides a riding lawn mower steering mechanism comprising a steering shaft 2, a steering plate 3, a first steering knuckle 6, a second steering knuckle 10, a steering knuckle arm 5, and a linkage 4.

One end of the steering shaft 2 is connected with the steering wheel 1, the other end of the steering shaft is rotatably connected with the frame 13, the steering shaft 2 can be driven to rotate relative to the frame 13 by rotating the steering wheel 1, and a steering gear 11 is coaxially arranged on the periphery of the steering shaft 2 and used for transmitting the action of the steering shaft 2 to the steering plate 3.

The steering plate 3 is rotatably connected to the frame 13, and specifically, the middle portion of the steering plate 3 is rotatably connected to the frame 13 through a rotating shaft. An arc-shaped tooth part is arranged on one side, close to the steering shaft 2, of the steering plate 3 and meshed with the steering gear 11, the circle center of the arc-shaped tooth part is located at the rotating center of the steering plate 3, and the steering shaft 2 can drive the steering plate 3 to rotate through the structures of the steering gear 11 and the arc-shaped tooth part.

Specifically, the steering plate 3 is set to be a sector plate, the arc tooth part is formed on the arc side of the sector plate, the middle part of the sector plate is rotatably connected with the frame 13 through a rotating shaft, and one corner of the sector plate, which is far away from the arc side, is hinged with the connecting rod 4, so that the sector plate can be rotated to pull the pull rod to displace.

The first steering knuckle 6 and the second steering knuckle 10 are rotatably connected to the frame 13 and are respectively used for controlling two steering wheels on two sides of the frame 13 to steer, and the first steering knuckle 6 and the second steering knuckle 10 synchronously rotate relative to the frame 13 through a linkage structure, so that the rotating direction and the rotating amplitude of the first steering knuckle 6 and the rotating amplitude of the second steering knuckle 10 are the same, and the stability of synchronous rotation of the two steering wheels can be ensured.

The knuckle arm 5 is connected with the first knuckle 6 and synchronously rotates relative to the rack 13, one end of the connecting rod 4 is hinged with one end, far away from the arc-shaped tooth part, of the steering plate 3, and the other end of the connecting rod is hinged with the rotating far end of the knuckle arm 5. Here, one end of the knuckle arm 5 is connected to the first knuckle 6, and the other end is hinged to the link 4, and correspondingly, the turning distal end of the knuckle arm 5 is the end of the knuckle arm 5 away from the first knuckle 6. So that the tie rod can pull the knuckle arm 5 to rotate, which in turn drives the first knuckle 6 to rotate, and the second knuckle 10 to rotate, which in turn drives the two wheels to turn. So, beat knuckle arm 5 through a pull rod and rotate, can drive two knuckles and rotate, simple structure, the transmission synchronism is high and stable.

When the automobile steers, the steering torque applied to the steering wheel 1 by a driver is output to the steering gear 11 through the steering shaft 2 and is output to the steering plate 3 through the arc-shaped tooth part, after the torque is amplified and reduced through the arc-shaped tooth part, the steering plate 3 rotates to drive the pull rod to displace, the knuckle arm 5 is pulled to rotate, and meanwhile, the first steering knuckle 6 and the second steering knuckle 10 synchronously rotate under the action of the linkage structure, so that the left steering wheel and the right steering wheel synchronously deflect.

It will be appreciated that in order to ensure that the steering wheel 1 rotates in the same direction as the steered wheels, when the steering wheel 1, the steering shaft 2 and the steering plate 3 are located behind the first knuckle 6 and the second knuckle 10, as shown in fig. 2, the first end of the knuckle arm 5 is connected to the first knuckle 6 and the second end is hinged to the tie rod, wherein the second end of the knuckle arm 5 should be located to the left of the first end, i.e., the tie rod is located to the left of the center of rotation of the knuckle arm 5.

According to the arrangement, the steering wheel 1 is directly driven to the steering wheel through the combination of the pure mechanical structure of the steering wheel 1, the steering shaft 2, the steering plate 3, the connecting rod 4 and the steering knuckle arm 5, so that steering is realized, and the steering wheel is simple and compact in structure, high in reliability and low in cost.

In some embodiments, the linkage structure comprises a first linkage arm 7, a second linkage, and a track rod 8.

Wherein, the first linkage arm 7 is connected with the first steering knuckle 6 and rotates synchronously relative to the frame 13; the second linkage arm 9 is connected with the second steering knuckle 10 and synchronously rotates relative to the frame 13; two ends of a transverse pull rod 8 are respectively hinged with the rotating far ends of the first linkage arm 7 and the second linkage arm 9. Here, the turning distal end of the second link arm is an end distant from the second knuckle.

Therefore, when the knuckle arm 5 drives the first knuckle 6 to rotate, the first knuckle 6 and the first linkage arm 7 synchronously rotate, the first linkage arm 7 drives the second linkage arm 9 to rotate through the tie rod 8, and then drives the second knuckle 10 to rotate, so that the first knuckle 6 and the second knuckle 10 synchronously rotate.

It can be understood that, in order to enable the first steering knuckle 6 and the second steering knuckle 10 to rotate in the same direction, the first linkage arm 7 and the second linkage arm 9 are both located on the same side of the tie rod 8, and in order to enable the first steering knuckle 6 and the second steering knuckle 10 to rotate in the same amplitude, the lengths of the first linkage arm 7 and the second linkage arm 9 are equal, that is, the connection distance between the tie rod on the first linkage arm and the first steering knuckle is equal to the connection distance between the tie rod on the second linkage arm and the second steering knuckle, and meanwhile, the first linkage arm, the second linkage arm and the tie rod enclose a parallelogram.

Specifically, both ends of the tie rod 8 are connected with the first linkage arm 7 and the second linkage arm 9 through ball connection structures, so that the tie rod 8 is stronger in transmission adaptability and more stable in structure.

As shown in fig. 1, a first steering sleeve and a second steering sleeve are disposed on the frame 13, the first steering knuckle 6 is rotatably connected to the first steering sleeve through a first rotating shaft, and the second steering knuckle 10 is rotatably connected to the second steering sleeve through a second rotating shaft. Thus, the connection area between the steering knuckle and the frame 13 can be increased by the rotary connection form of the sleeve and the rotary shaft, and the longitudinal stability of the steering knuckle during rotation can be improved due to the fact that the rotary shaft and the sleeve both extend longitudinally.

Furthermore, the knuckle arm 5 and the first linkage arm 7 are connected with the first rotating shaft and are respectively located at two ends of the first steering sleeve, namely the knuckle arm 5 is connected to one end above the first steering shaft 2, and the first linkage wall and the first steering joint 6 are connected to one end below the first steering shaft 2, so that a certain space exists between the connecting rod 4 and the tie rod 8 in space, and mutual influence of two linkage relations is avoided.

In some embodiments, the steering shaft 2 is arranged obliquely with respect to the plane of the steering plate 3, and the steering gear 11 is arranged as a helical gear.

When the steering gear is assembled and used, a certain angle exists between the steering gear 11 and the steering plate 3 in the axial direction, the angle is 6-10 degrees, the steering plate 3 needs to be bent by a certain angle in order to ensure normal meshing between the gears, and therefore the manufacturing cost is greatly increased, and the installation space also needs to be enlarged.

In this scheme, steering gear 11 sets up to the helical gear, and inclination and steering gear 11 are for the inclination looks adaptation of steering plate 3, like this, can improve the meshing contact degree of coincidence between steering gear 11 and the arc tooth portion, make to turn to the smooth operation, reduce and strike and noise.

Specifically, the steering gear 11 is a helical cylindrical gear, and the arc-shaped tooth portion is an involute gear.

In order to improve the mounting stability of the steering gear 11, the steering gear 11 is mounted to the frame 13 by a pressing plate 14.

In some preferred schemes, a limiting structure is arranged between the steering plate 3 and the frame 13 and used for limiting the rotation angle of the steering plate 3, so that the phenomenon that the rotation angle of the steering wheel 1 is too large, the meshing failure of the steering gear 11 and the arc-shaped tooth part is caused, the steering gear 11 rotates out of the range of the sector gear, so that a fault occurs, and meanwhile, the accident caused by the too large steering angle of the steering wheel can be avoided.

Wherein, limit structure includes spout 12 and slider, the slider slide set up in the spout 12, spout 12 set up to use the rotation center of deflector 3 is the circular shape arc, can carry on spacingly to the slip scope of slider through spout 12, simple structure, reliable and stable. The slide groove 12 and the slider are disposed one on the frame 13 and the other on the steering plate 3.

Here, the runner 12 is provided on the steering plate 3, and the slider is provided on the frame 13. Therefore, the chute 12 is processed on the steering plate 3, so that the steering plate is convenient and quick, and time and labor are saved.

It should be noted that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., as used herein, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience of description and to simplify the description, but do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description herein, it is also noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as the case may be, by those of ordinary skill in the art.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar contents in other embodiments may be referred to for the contents which are not described in detail in some embodiments. The utility model provides a plurality of schemes contain the basic scheme of itself, mutual independence to restrict each other, but it also can combine each other under the condition of not conflicting, reaches a plurality of effects and realizes jointly.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (10)

1. A ride-on mower steering mechanism, comprising:

one end of the steering shaft (2) is connected with the steering wheel (1), the other end of the steering shaft is rotatably connected with the rack (13), and a steering gear (11) is coaxially arranged;

the steering plate (3) is rotatably connected to the rack (13), an arc-shaped tooth part meshed with the steering gear (11) is arranged on the steering plate (3), and the circle center of the arc-shaped tooth part is located at the rotating center of the steering plate (3);

a first steering knuckle (6) and a second steering knuckle (10) which are rotatably connected to the frame (13) and synchronously rotate relative to the frame (13) through a linkage structure;

a knuckle arm (5) connected to the first knuckle (6) and rotating synchronously with respect to the frame (13);

and one end of the connecting rod (4) is hinged with one end of the steering plate (3) far away from the arc-shaped tooth part, and the other end of the connecting rod is hinged with the rotating far end of the knuckle arm (5).

2. The ride mower steering mechanism of claim 1, wherein said linkage structure comprises:

the first linkage arm (7) is connected with the first steering knuckle (6) and synchronously rotates relative to the rack (13);

a second linkage arm (9) connected to the second knuckle (10) and synchronously rotating with respect to the frame (13);

and two ends of the transverse pull rod (8) are respectively hinged with the rotating far ends of the first linkage arm (7) and the second linkage arm (9).

3. The ride-on mower steering mechanism according to claim 2, wherein the frame (13) is provided with a first steering sleeve and a second steering sleeve, the first steering knuckle (6) being rotatably connected to the first steering sleeve by a first rotating shaft, and the second steering knuckle (10) being rotatably connected to the second steering sleeve by a second rotating shaft.

4. The riding mower steering mechanism according to claim 3, wherein the knuckle arm (5) and the first linkage arm (7) are both connected to the first rotating shaft and are located at both ends of the first steering sleeve.

5. The riding mower steering mechanism according to claim 1, wherein the steering shaft (2) is arranged inclined with respect to the plane of the steering plate (3), and the steering gear (11) is arranged as a helical gear.

6. The riding mower steering mechanism according to claim 5, wherein the steering gear (11) is provided as a helical cylindrical gear and the arcuate teeth are provided as involute gears.

7. The steering mechanism of riding mower according to claim 1, wherein a limiting structure is arranged between the steering plate (3) and the frame (13) for limiting the rotation angle of the steering plate (3).

8. The steering mechanism of riding mower according to claim 7, wherein the limiting structure comprises a sliding groove (12) and a sliding block slidably disposed in the sliding groove (12), one of the sliding groove (12) and the sliding block is disposed on the frame (13), the other one of the sliding groove (12) and the sliding block is disposed on the steering plate (3), and the sliding groove (12) is disposed in an arc shape with a rotation center of the steering plate (3) being circular.

9. The ride-on mower steering mechanism according to claim 1, wherein the steering gear (11) is mounted to the frame (13) by a pressure plate (14).

10. The ride-on mower steering mechanism according to claim 2, wherein both ends of the tie rod (8) are connected to the first linkage arm (7) and the second linkage arm (9) by a ball connection.

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