Unilateral axle driving mechanism of free steering chassis

Abstract

The utility model provides a unilateral axle driving mechanism of a free steering chassis, the unilateral axle driving mechanisms are symmetrically arranged on the left side and the right side of the free steering chassis, the unilateral axle driving mechanisms on the two sides are fixedly connected through a connecting plate, and each unilateral axle driving mechanism is provided with a U-shaped rocker arm frame with the middle sunken downwards. The front end and the rear end of the U-shaped rocker arm frame are each rotationally provided with a movable connecting rod, one end of each movable connecting rod is horizontally and rotationally connected with the U-shaped rocker arm frame, a first driving push rod is connected between each movable connecting rod and the U-shaped rocker arm frame, the other end of each movable connecting rod is horizontally and rotationally provided with a walking wheel with a hub motor, and a second driving push rod is connected between each movable connecting rod and the walking wheel. According to the single-side bridge driving mechanism, the traveling wheels on the front side and the rear side can rotate in two stages, more complex movement can be achieved, meanwhile, the effect of adjusting the wheel distance can be achieved, and the applicability of scenes is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to agricultural machinery, concretely relates to a single-side bridge driving mechanism of free steering chassis. BACKGROUND

[0002] In vehicle chassis design, longitudinal drive axle is the core component that bears weight and load. It can cope with complex road surfaces such as potholes and stones, and ensure the driving stability of the chassis under variable road conditions. In addition, the longitudinal axle performs well in stability, has strong anti-roll and anti-bending capacity, effectively reduces vehicle body roll, and enhances vehicle stability.

[0003] However, the longitudinal axle also has some shortcomings:

[0004] 1) The steering angle is limited, as both ends of the longitudinal axle are equipped with wheels, if the steering angle is too large, the wheels will interfere with the axle body, limiting the rotation range, and preventing the vehicle from completing the spot steering;

[0005] 2) Only basic wheel steering is supported, and there is no function of adjusting the wheelbase, which limits the driving performance of the vehicle and the ability to adapt to different road conditions to some extent. INVENTION CONTENTS

[0006] The utility model provides a single-side bridge driving mechanism of free steering chassis, and the left and right sides of the free steering chassis are symmetrically provided with single-side bridge driving mechanisms, and the single-side bridge driving mechanisms on the two sides are fixedly connected through a connecting plate,

[0007] The single-side bridge driving mechanism is provided with a U-shaped rocker arm frame concave downward in the middle, both ends of the U-shaped rocker arm frame are rotatably installed with a movable connecting rod, one end of the movable connecting rod is rotatably connected with the U-shaped rocker arm frame, a first driving push rod is connected between the movable connecting rod and the U-shaped rocker arm frame, the other end of the movable connecting rod is rotatably installed with a traveling wheel with a driving part, and a second driving push rod is connected between the movable connecting rod and the traveling wheel.

[0008] Further, the driving part is a hub motor.

[0009] Further, the first driving push rod and the second driving push rod are hydraulic push rods.

[0010] Further, both ends of the U-shaped rocker arm frame are provided with transverse openings, and one end of the movable connecting rod is rotatably installed in the transverse opening through a lock pin;

[0011] Both ends of the first driving push rod are rotatably connected with the U-shaped rocker arm frame and the inner side of the movable connecting rod.

[0012] Further, the traveling wheel is provided with a vertical rotating shaft penetrating through the movable connecting rod,

[0013] One end of the second main push rod is rotationally connected with the vertical rotating shaft, and the other end is rotationally connected with the rotating seat on the upper surface of the movable connecting rod.

[0014] Further, the U-shaped rocker arm is a channel steel, and the movable connecting rod is a square steel pipe.

[0015] The utility model discloses the advantages are:

[0016] 1) innovatively put forward a double-section steering drive axle, and the double-section mainly solves two problems, one is steering problem, can realize the swing of each wheel, and also can realize variable wheel track through the coordination control of the steering of the front and rear two wheel groups, increase the applicability of scene;

[0017] 2) adopt double-section bridge design, can realize greater angle adjustment to the wheel, and the rotation angle of each wheel can be individually adjusted, and the double-section steering drive axle on the two sides of the chassis cooperates with the all-wheel drive transmission system, can realize various steering controls such as spot steering, crabbing steering and Ackermann steering;

[0018] 3) compared with the traditional transverse bridge, the bridge of the application is a longitudinal bridge (longitudinal bridge), i.e.

[0019] 4) each walking wheel is provided with a hub motor, directly adopts the hub motor to drive the walking wheel to rotate, does not need complicated transmission system, simplifies the driving mechanism; BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the following will be to the embodiment or the description of prior art needed to use the drawing briefly introduced, obviously, the following description in the drawing is only some embodiments of the utility model, for those skilled in the art, under the premise of not paying the creative labor, can also obtain other drawings according to these drawings.

[0021] Figure 1 It is a free steering chassis schematic diagram constituted by double-side bridge driving mechanism;

[0022] Figure 2 It is a structure diagram of single-side longitudinal double-section bridge;

[0023] Figure 3 It is a structure diagram of single-side longitudinal double-section bridge;

[0024] Figure 4It is a schematic view of single-side longitudinal double-joint bridge in inner eight state;

[0025] Figure 5 It is a schematic view of single-side longitudinal double-joint bridge in outer eight state. DETAILED DESCRIPTION

[0026] In the following description, a large number of specific details are given to provide a more thorough understanding of the present application. However, it is apparent to those skilled in the art that the present application can be implemented without one or more of these details. In other examples, some technical features known in the art are not described in order not to obscure the present application.

[0027] In order to thoroughly understand the present application, detailed steps and detailed structures will be proposed in the following description in order to explain the technical scheme of the present application. The preferred embodiments of the present application are described in detail as follows, however, in addition to these detailed descriptions, the present application can have other implementation manners.

[0028] Referring to Figures 1-4 As shown in the figure, the present application provides a single-side bridge driving mechanism of a free steering chassis, the left and right sides of the free steering chassis 1000 are symmetrically provided with single-side bridge driving mechanisms 1100, and the single-side bridge driving mechanisms 1100 on the two sides are fixedly connected through a connecting plate 1200.

[0029] The longitudinal double-joint bridge 1100 is provided with a rocker bracket 1101, and an active connecting rod 1102 is rotatably installed at both ends of the rocker bracket 1101, one end of the active connecting rod 1102 is horizontally rotatably connected with the rocker bracket 1101, a first driving push rod 1103 is connected between the active connecting rod 1102 and the rocker bracket 1101, and a traveling wheel 1300 with a driving component 1301 is horizontally rotatably installed at the other end of the active connecting rod 1102, and a second driving push rod 1104 is connected between the active connecting rod 1102 and the traveling wheel 1300.

[0030] The driving component 1301 can be selected from a driving motor or a driving motor, and is preferably a wheel hub motor. The first driving push rod 1103 and the second driving push rod 1104 are preferably hydraulic push rods or electric push rods, and are preferably hydraulic push rods.

[0031] The present application provides a double-joint steering driving bridge, as shown in the figure, Figures 3-5As shown, respectively shows the single side longitudinal double section bridge in three states, the structure through the ingenious design, the wheel can realize greater amplitude swing. This design mainly depends on the extension of two active push rods to drive the rotation between the connecting rod and the rocker arm frame. First, the extension of the first active push rod 1103 can drive the rotation between the movable connecting rod 1102 and the rocker arm frame 1101. This rotation realizes the first level of attitude adjustment of the wheel, which is defined as bridge steering in the application. Second, the extension of the second active push rod 1104 can drive the rotation between the movable connecting rod 1102 and the walking wheel 1300. On the basis of the first level of attitude adjustment, this rotation can again adjust the swing of the wheel, which is defined as wheel steering in the application. This design makes the swing amplitude of the wheel larger, so that the vehicle can better adapt to various road conditions during driving. The utility model adopts two-stage adjustment, which can make the wheel adjustment amplitude larger, and the steering of each wheel can be controlled independently, and more complex steering can be realized, such as in-place steering, crab steering, Ackerman steering and various steering control.

[0032] Figure 2 As shown is a schematic view of one of the longitudinal double section bridges in a straight state, when both longitudinal double section bridges are in this state, the chassis is in a straight state.

[0033] By controlling the movable connecting rod 1102 to rotate left and right through the first active push rod 1103, and controlling the walking wheel 1300 to swing left and right through the second active push rod 1104, the complex steering of the chassis can be realized, such as Figure 4 As shown is a schematic view of one of the longitudinal double section bridges in an inner eight, Figure 5 As shown is a schematic view of one of the longitudinal double section bridges in an outer eight.

[0034] As shown, Figure 2 As shown, the rocker arm frame 1101 is a U-shaped metal frame with a downwardly recessed middle part, which fully utilizes the middle area of the wheel and reduces the gravity center of the chassis, thereby improving the stability of the vehicle. Through this structural design, the vehicle can maintain good maneuverability and stability during complex steering operation.

[0035] The utility model discloses a chassis, and each walking wheel of the chassis is provided with a hub motor, directly adopts the hub motor to drive the walking wheel to rotate, does not need complex transmission system, simplifies the drive mechanism, and can also control the torque of the four hub motors to realize more complex steering processing.

[0036] In an optional embodiment, the U-shaped rocker arm frame 1101 is provided with a transverse opening at the front and rear ends, and the movable connecting rod 1102 is rotatably installed in the transverse opening through a lock pin; the two ends of the first active push rod 1103 are rotatably connected with the inner side of the U-shaped rocker arm frame 1101 and the movable connecting rod 1102.

[0037] In an alternative embodiment, the walking wheel 1300 is provided with a vertical rotating shaft 1302 passing through the movable link 1102, one end of the second driving push rod 1104 is rotatably connected with the vertical rotating shaft 1302, and the other end is rotatably connected with a rotating seat on the upper surface of the movable link 1102.

[0038] In an alternative embodiment, the U-shaped rocker arm frame 1101 is an H-shaped steel, and the movable link 1102 is a square steel pipe, which is easy to form and low in manufacturing cost.

[0039] The preferred embodiments of the utility model are described above. It should be understood that the utility model is not limited to the specific embodiments described above, and the devices and structures not described in detail should be understood as being implemented in the ordinary way in the art; any person skilled in the art can make many possible changes and modifications to the technical scheme of the utility model or modify it into equivalent embodiments with equivalent changes without departing from the scope of the technical scheme of the utility model, which does not affect the essential content of the utility model. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the utility model without departing from the content of the technical scheme of the utility model still belongs to the protection scope of the technical scheme of the utility model.

Claims

1. A single-sided axle drive mechanism for a free-steering chassis, wherein single-sided axle drive mechanisms (1100) are symmetrically arranged on the left and right sides of the free-steering chassis (1000), and the single-sided axle drive mechanisms (1100) on both sides are fixedly connected by a connecting plate (1200), characterized in that, The single-sided bridge drive mechanism (1100) is provided with a U-shaped rocker arm (1101) with a downward recess in the middle. A movable connecting rod (1102) is rotatably installed at both the front and rear ends of the U-shaped rocker arm (1101). One end of the movable connecting rod (1102) is horizontally rotatably connected to the U-shaped rocker arm (1101). A first active push rod (1103) is connected between the movable connecting rod (1102) and the U-shaped rocker arm (1101). A traveling wheel (1300) with a drive component (1301) is horizontally rotatably installed at the other end of the movable connecting rod (1102). A second active push rod (1104) is connected between the movable connecting rod (1102) and the traveling wheel (1300).

2. The single-sided bridge drive mechanism as described in claim 1, characterized in that, The drive unit (1301) is a hub motor.

3. The single-sided bridge drive mechanism as described in claim 1, characterized in that, The first active push rod (1103) and the second active push rod (1104) are hydraulic push rods / electric push rods.

4. The single-sided bridge drive mechanism as described in claim 1, characterized in that, The U-shaped rocker arm (1101) has transverse openings at both the front and rear ends, and one end of the movable connecting rod (1102) is rotatably installed in the transverse opening through a locking pin; The two ends of the first active push rod (1103) are rotatably connected to the inner side of the U-shaped rocker arm (1101) and the movable connecting rod (1102).

5. The single-sided bridge drive mechanism as described in claim 3, characterized in that, The traveling wheel (1300) is provided with a vertical pivot (1302) passing through the movable link (1102). One end of the second active push rod (1104) is rotatably connected to the vertical rotating shaft (1302), and the other end is rotatably connected to the rotating seat on the upper surface of the movable connecting rod (1102).

6. The single-sided bridge drive mechanism as described in claim 1, characterized in that, The U-shaped rocker arm (1101) is made of I-beams, and the movable connecting rod (1102) is made of square steel pipe.

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