CN216497457U - Steering device and moving trolley - Google Patents

Abstract

The utility model discloses a steering device and a mobile trolley. The steering device comprises a vehicle frame, a first connecting arm, a second connecting arm, a steering tie rod, a link mechanism and a steering gear. One end of the first connecting arm rotates with the vehicle frame. connection, the other end of the first connecting arm is rotatably connected with one end of the steering tie rod, one end of the second connecting arm is rotatably connected with the frame, and the other end of the second connecting arm is rotatably connected with the other end of the steering tie rod; the linkage mechanism The two ends of the steering gear are respectively connected with the output shaft of the steering gear and the steering tie rod, and the steering gear, the connecting rod mechanism, the steering tie rod, the first connecting arm and the second connecting arm perform torque transmission in the plane. The torque transmission of the steering device of the utility model is carried out in the same plane, and the output torque efficiency is high, so the steering gear with small volume can be used, and there is no installation of large fisheye bearing joints, which reduces the volume and space of the overall structure. Small footprint.

Description

Steering device and mobile trolley

technical field

The utility model relates to the technical field of mobile trolleys, in particular to a steering device and a mobile trolley.

Background technique

Nowadays, most toy cars or educational simulation cars are equipped with a front wheel steering mechanism. The front wheel steering usually adopts a trapezoidal structure designed based on the Ackerman steering principle, and provides driving through the steering gear to drive the deformation of the trapezoidal link structure. 's motivation.

At present, the steering gear is usually installed horizontally in the middle of the moving trolley. The torque generated by the rotation of the output shaft of the steering gear in the vertical plane is converted into the torque in the horizontal plane through the fisheye bearing joint to output to the trapezoidal structure, and its output torque efficiency is Low. Among them, the provided fisheye bearing joint has a large volume, and in order to achieve high output torque efficiency, a large-volume steering gear is also required, so that the overall steering structure occupies a large space.

Utility model content

The main purpose of the utility model is to propose a steering device, which aims to solve the technical problem that the steering structure of the current mobile trolley occupies a large space.

In order to achieve the above purpose, the present utility model proposes a steering device, the steering device includes a vehicle frame, a first connecting arm, a second connecting arm, a steering tie rod, a link mechanism and a steering gear, and one end of the first connecting arm is connected to the vehicle. The frame is rotatably connected, the other end of the first connecting arm is rotatably connected with one end of the steering tie rod, one end of the second connecting arm is rotatably connected with the frame, and the other end of the second connecting arm is rotatably connected with the other end of the steering tie rod;

The two ends of the connecting rod mechanism are respectively connected with the output shaft of the steering gear and the steering tie rod, and the steering gear, the connecting rod mechanism, the steering tie rod, the first connecting arm and the second connecting arm perform torque transmission in the plane.

Wherein, the steering gear is located between the first connecting arm and the second connecting arm.

The link mechanism includes a swing rod and a transmission rod, one end of the pendulum rod is fixedly connected with the output shaft of the steering gear, the other end of the swing rod is rotatably connected with one end of the transmission rod, and the other end of the transmission rod is rotatably connected with the steering tie rod.

Among them, the output shaft of the steering gear is arranged vertically downward, and the transmission rod is located below the steering rod.

Among them, the swing rod is located below the transmission rod.

Wherein, the end of the swing rod connected to the output shaft of the steering gear has a protruding portion extending downward, and the vehicle frame is correspondingly configured with a through hole for avoiding the protruding portion.

Wherein, the length ratio of the first connecting arm, the second connecting arm, the steering tie rod, the swing rod, and the transmission rod is 1:1:3:1:(0.4-0.5).

Wherein, connecting assemblies are respectively provided between the first connecting arm and the second connecting arm and the frame, and the connecting assemblies include a first bushing rotatably arranged on the frame, and the first bushing is located between the first connecting arm and the second connecting arm. Below the arm, the first connecting arm and the second connecting arm are connected with the first bushing through a first fastener.

Wherein, the connecting assembly further includes a rotating second bushing, the second bushing is located above the first connecting arm and the second connecting arm, the first connecting arm and the second connecting arm and the second bushing are connected by a second fastener connected, the second shaft sleeve and the first shaft sleeve are arranged up and down opposite to each other.

The utility model also proposes a mobile trolley, which includes the steering device described above.

Compared with the prior art, the beneficial effects of the technical solution of the present utility model are:

The steering gear, the connecting rod mechanism, the steering tie rod, the first connecting arm and the second connecting arm in the steering device of the utility model transmit torque in the plane, and the output torque efficiency is high, so the steering gear with small volume can be used, and no The installation of the larger fisheye bearing joint reduces the volume of the overall structure and occupies less space.

Description of drawings

1 is a schematic structural diagram of a steering device in an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of the steering device from another perspective in FIG. 1;

Fig. 3 is an exploded view of the steering device in Fig. 1;

Fig. 4 is the schematic diagram of the length setting of each component of the steering device in Fig. 1;

FIG. 5 is an exploded view of the partial structure of the steering device in FIG. 1 .

Detailed ways

The solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the difference between the various components under a certain posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly.

It will also be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

In addition, the descriptions involving "first", "second", etc. in the present invention are only for description purposes, and should not be understood as indicating or implying their relative importance or implicitly indicating the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In addition, the technical solutions between the various embodiments can be combined with each other, but must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of such technical solutions does not exist. , is not within the scope of protection required by the present utility model.

The utility model proposes a steering device. Referring to FIG. 1 , the steering device includes a vehicle frame 100 , a first connecting arm 200 , a second connecting arm 300 , a steering tie rod 400 , a link mechanism 500 and a steering gear 600 . One end of the arm 200 is rotatably connected to the frame 100, the other end of the first connecting arm 200 is rotatably connected to one end of the tie rod 400, one end of the second connecting arm 300 is rotatably connected to the frame 100, and the other end of the second connecting arm 300 is rotatably connected to the frame 100. One end is rotatably connected with the other end of the tie rod 400;

Both ends of the link mechanism 500 are respectively connected with the output shaft of the steering gear 600 and the steering tie rod 400. The steering gear 600, the link mechanism 500, the steering tie rod 400, the first connecting arm 200 and the second connecting arm 300 are in a plane torque transmission.

The steering device of this embodiment can be used to realize the steering of the front wheels of a mobile car, and the mobile car can be an educational simulation car or a toy car. Specifically, the steering device is composed of a frame 100, a first connecting arm 200, a second connecting arm 300, a tie rod 400, a link mechanism 500 and a steering gear 600. The frame 100 can be in the form of a plate body or a frame body. , and it may or may not be a structural part of the chassis of the mobile trolley. When it is not a structural part of the chassis of the mobile trolley, it can be installed on the chassis of the mobile trolley during specific settings. Parts of the first connecting arm 200 , the second connecting arm 300 , the tie rod 400 and the frame 100 form an isosceles trapezoid structure based on the Ackermann steering principle. They are arranged opposite in the left and right directions, and the one end of the two rotatably connected with the frame 100 is connected to the wheel axle of the wheel. Moreover, the rotational connection relationship between the above-mentioned components can be realized by using copper bushings.

Among them, the steering gear 600, the link mechanism 500, the tie rod 400, the first connecting arm 200 and the second connecting arm 300 transmit torque in a plane, and the plane can be understood as a horizontal plane; When the output shaft of the steering gear 600 rotates, the torque output by the steering gear 600 is transmitted in turn, the link mechanism 500 drives the steering tie rod 400 to move, and the steering tie rod 400 drives the first connecting arm 200 and the second connecting arm The 300 rotates around its rotational connection point with the frame 100 respectively, thereby driving the left and right front wheels to turn accordingly. It is easy to understand that when the output shaft of the steering gear 600 rotates forward or reverse, the left and right front wheels turn left or right correspondingly.

The steering gear 600, the link mechanism 500, the steering tie rod 400, the first connecting arm 200 and the second connecting arm 300 in the steering device transmit torque in the plane, and the output torque efficiency is high, so a small-sized steering gear can be used 600, and there is no large fisheye bearing joint, which reduces the volume of the overall structure and occupies a small space.

In a preferred embodiment, referring to FIGS. 1 and 2 , the steering gear 600 is located between the first connecting arm 200 and the second connecting arm 300 . Wherein, there is an installation space between the first connecting arm 200 and the second connecting arm 300. In this embodiment, the steering gear 600 is installed between the first connecting arm 200 and the second connecting arm 300, which can avoid being installed in other positions to occupy The installation space of other structures can realize the rational utilization of the space, which is beneficial to improve the compactness of the structure.

In a preferred embodiment, referring to FIGS. 1 and 2 , the link mechanism 500 includes a swing rod 510 and a transmission rod 520, one end of the swing rod 510 is fixedly connected with the output shaft of the steering gear 600, and the other end of the swing rod 510 is connected to the output shaft of the steering gear 600. One end of the transmission rod 520 is rotatably connected, and the other end of the transmission rod 520 is rotatably connected with the tie rod 400 . When the output shaft of the steering gear 600 rotates, the swing rod 510 is driven to swing, and then the steering rod 400 is driven to move through the transmission rod 520 . Wherein, the rotational connection point of the transmission rod 520 and the tie rod 400 is located between the two ends of the tie rod 400, and the specific position is set according to the actual situation. In this embodiment, the link mechanism 500 adopts a swing rod 510 and a transmission rod 520, which has a simple structure, is easy to set, and has stable transmission.

Further, referring to FIGS. 1 and 2 , the output shaft of the steering gear 600 is arranged vertically downward, and the transmission rod 520 is located below the tie rod 400 . The arrangement and layout of the structure can make the steering rod 400 in the height space of the steering gear 600, reduce the overall height of the steering device, save space and make the structure more compact.

Further, referring to FIGS. 1 and 2 , the swing rod 510 is located below the transmission rod 520 . In this structure, the layout is arranged so that the steering gear 600 is installed downward, so as to enlarge the space above the steering gear 600 to a greater extent and facilitate the installation of other structures.

Further, referring to FIG. 3 , one end of the swing rod 510 connected to the output shaft of the steering gear 600 has a downwardly extending protrusion 511 , and the vehicle frame 100 is correspondingly formed with a through hole 110 for avoiding the protrusion 511 . In this embodiment, the protruding portion 511 of the swing rod 510 is accommodated through the through hole 110 on the vehicle frame 100 , so that the swing rod 510 is disposed adjacent to the vehicle frame 100 , so that the steering gear 600 can be further installed downward and the steering gear 600 can be enlarged. the upper space and improve the compactness of the structure.

In a preferred embodiment, the length ratio of the first connecting arm 200, the second connecting arm 300, the tie rod 400, the swing rod 510, and the transmission rod 520 is 1:1:3:1:(0.4-0.5).

4 , the BE section corresponds to the first connecting arm 200 , the DF section corresponds to the second connecting arm 300 , the BD section corresponds to the steering tie rod 400 , the GH section corresponds to the swing rod 510 , and the CH section corresponds to the transmission rod 520 . Based on the length ratio relationship of the above components, for example, the length of BE and DF is set to 26mm, the length of BD is corresponding to 78mm, the length of GH is corresponding to 26mm, and the length of CH is corresponding to 11.5mm; That is, the length of the left and right front wheel spacing) is set to 96mm, the length of the IJ segment (ie the front and rear wheel spacing) is set to 128.63mm, the length of the BC segment is set to 28mm, and the length of the CD segment is set to 50mm, in order to achieve the ideal geometric relationship; When turning, the maximum steering angle of the inner wheel (left steering is the left front wheel) can reach 39°, and the steering angle of the outer wheel (ie the right front wheel) is 27.37°, which is smaller than the steering angle of the inner wheel. The intersection point with the normal line of the steering outer wheel coincides with the steering center of the rear wheel, which can realize the steering process of full wheel rolling and no slippage, and the steering precision is high.

In a preferred embodiment, referring to FIG. 5 , connecting components are respectively provided between the first connecting arm 200 and the second connecting arm 300 and the vehicle frame 100 , and the connecting components include a first bushing rotatably arranged on the vehicle frame 100 10. The first bushing 10 is located below the first connecting arm 200 and the second connecting arm 300 , and the first connecting arm 200 and the second connecting arm 300 are connected with the first bushing 10 by the first fastener 1 . There are two connecting assemblies, which are respectively provided corresponding to the first connecting arm 200 and the second connecting arm 300 , and the first connecting arm 200 and the second connecting arm 300 are connected with the vehicle frame 100 through the connecting assemblies to realize rotational connection. The connecting assembly includes a first bushing 10, the first bushing 10 is rotatably arranged on the frame 100, and is connected with the first connecting arm 200 and the second connecting arm 300 above it through the first fastener 1, so that the first A connecting arm 200 and a second connecting arm 300 can rotate on the frame 100 . Preferably, the first bushing 10 is preferably a copper bushing. Wherein, the first fastener 1 is a screw.

Further, referring to FIG. 5 , the connecting assembly further includes a rotating second bushing 20 , the second bushing 20 is located above the first connecting arm 200 and the second connecting arm 300 , the first connecting arm 200 and the second connecting arm 300 The second shaft sleeve 20 is connected with the second shaft sleeve 20 through the second fastener 2 , and the second shaft sleeve 20 and the first shaft sleeve 10 are disposed up and down opposite to each other. On the basis of the provided first bushing 10 , the connecting assembly further includes a second bushing 20 , and the second bushing 20 is installed through the mounting bracket on the vehicle frame 100 to be positioned on the first connecting arm 200 and the second connecting arm 300 and connected with the first connecting arm 200 and the second connecting arm 300 located below it through the second fastener 2 . The second bushing 20 cooperates with the first bushing 10 up and down to further enhance the stability of the rotational connection between the first connecting arm 200 and the second connecting arm 300 and the frame 100 . Preferably, the second bushing 20 is preferably a copper bushing. Wherein, the second fastener 2 is a screw.

The utility model also proposes a mobile trolley, the mobile trolley includes the steering device described in the foregoing embodiments, and the specific structure of the steering device refers to the above-mentioned embodiments. All the technical effects brought about by the technical solutions of the above-mentioned embodiments are not repeated here.

The above descriptions are only part or preferred embodiments of the present utility model, and neither the text nor the accompanying drawings can therefore limit the scope of protection of the present utility model. The equivalent structural transformation made by the content of the drawings and the drawings, or the direct/indirect application in other related technical fields are all included in the protection scope of the present invention.

Claims (10)

1. A steering device, characterized in that it comprises a vehicle frame, a first connecting arm, a second connecting arm, a steering tie rod, a link mechanism and a steering gear, and one end of the first connecting arm rotates with the vehicle frame The other end of the first connecting arm is rotatably connected with one end of the tie rod, one end of the second connecting arm is rotatably connected with the frame, and the other end of the second connecting arm is connected with the The other end of the steering tie rod is connected in rotation; Both ends of the link mechanism are respectively connected with the output shaft of the steering gear and the steering tie rod, the steering gear, the link mechanism, the steering tie rod, the first connecting arm and the tie rod. The second connecting arm performs torque transmission in a plane. 2 . The steering device according to claim 1 , wherein the steering gear is located between the first connecting arm and the second connecting arm. 3 . 3 . The steering device according to claim 1 , wherein the link mechanism comprises a swing rod and a transmission rod, one end of the swing rod is fixedly connected with the output shaft of the steering gear, and the The other end is rotatably connected with one end of the transmission rod, and the other end of the transmission rod is rotatably connected with the tie rod. 4 . The steering device according to claim 3 , wherein the output shaft of the steering gear is arranged vertically downward, and the transmission rod is located below the steering tie rod. 5 . 5 . The steering device according to claim 4 , wherein the swing rod is located below the transmission rod. 6 . 6 . The steering device according to claim 5 , wherein one end of the swing rod connected to the output shaft of the steering gear has a downwardly extending protruding portion, and the frame is correspondingly configured with a Avoid the through holes of the protrusions. 7 . The steering device according to claim 3 , wherein the length ratio of the first connecting arm, the second connecting arm, the tie rod, the swing rod and the transmission rod is 1. 8 . :1:3:1:(0.4～0.5). 8 . The steering device according to claim 1 , wherein a connecting assembly is respectively provided between the first connecting arm and the second connecting arm and the frame, and the connecting assembly includes a rotatably arranged on a first bushing on the frame, the first bushing is located below the first connecting arm and the second connecting arm, the first connecting arm and the second connecting arm are connected to the The first bushing is connected by a first fastener. 9 . The steering device according to claim 8 , wherein the connecting assembly further comprises a rotating second bushing, the second bushing is located between the first connecting arm and the second connecting arm. 10 . Above, the first connecting arm and the second connecting arm are connected with the second bushing through a second fastener, and the second bushing and the first bushing are arranged opposite to each other up and down. 10. A mobile cart, characterized by comprising the steering device according to any one of claims 1-9.

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