Two-knuckle steering drive axle and chassis

Abstract

The invention provides a two-knuckle steering drive axle and a chassis, the two-knuckle steering drive axle is installed on the chassis in a bilateral symmetry mode, the two-knuckle steering drive axle is provided with a main supporting frame, the main supporting frame is in floating connection with the chassis, and the two-knuckle steering drive axle comprises a multi-connecting-rod supporting system and a transmission system; the multi-connecting-rod supporting system comprises a rocker arm frame, movable connecting rods, rotating supports and wheels, wherein the movable connecting rods, the rotating supports and the wheels are symmetrically installed at the two ends of the rocker arm frame. The transmission system comprises a power input shaft, a front transmission mechanism and a rear transmission mechanism. According to the two-section steering drive axle, the wheels can swing by a larger amplitude, rotation of each wheel can be independently controlled, and more complex steering can be achieved in cooperation with an all-wheel-drive transmission system.

Description

Technical Field

[0001] The invention relates to a chassis of a mobile vehicle, and in particular to a double-section steering drive axle and a chassis. Background Art

[0002] The longitudinal drive axle is a key component in the vehicle chassis design that bears the vehicle weight and various loads. The longitudinal axle can cope with complex road conditions, such as potholes, stones, etc., to ensure the driving stability of the chassis under various road conditions. Secondly, in terms of stability, the longitudinal axle has good anti-roll performance and anti-bending performance, which can effectively suppress the body roll during driving and improve the stability of the vehicle.

[0003] At present, longitudinal bridges have the following disadvantages:

[0004] 1) The steering angle is limited. Since wheels are arranged at both ends of the longitudinal bridge, if the steering angle of the wheels is too large, it will interfere with the longitudinal bridge, which will affect the rotation range of the wheels and make it impossible to realize the on-site steering function of the chassis.

[0005] 2) It can only realize simple wheel steering and does not have the function of adjusting the wheelbase, which limits the driving performance and adaptability of the vehicle to a certain extent. Summary of the invention

[0006] The present invention provides a double-section steering drive axle, which is symmetrically mounted on a mobile chassis, and is provided with a main support frame, which is floatingly connected to the chassis, and comprises a multi-link support system and a transmission system.

[0007] The multi-link support system includes a rocker frame and movable links, rotating supports and wheels symmetrically installed at both ends of the rocker frame, the middle part of the rocker frame is vertically rotatably connected to the main support frame, both ends of the rocker frame are horizontally rotatably connected with movable links, a first active push rod is connected between the movable link and the rocker frame, the rotating support includes upper and lower rotating sleeves that can rotate relative to each other, the upper rotating sleeve is fixedly connected to the other end of the movable link, a second active push rod is connected between the lower rotating sleeve and the movable link, and a wheel is rotatably installed on one side of the lower rotating sleeve;

[0008] The transmission system includes a power input shaft, a front transmission mechanism, and a rear transmission mechanism. The front transmission mechanism and the rear transmission mechanism are used to drive the front wheels and the rear wheels respectively. The power input shaft is installed in the middle of the main support frame through a bearing, and the other end is connected to the front transmission mechanism and the rear transmission mechanism at the same time.

[0009] Both the front drive mechanism and the rear drive mechanism are successively provided with a first rotating shaft, a second transmission shaft and a gear transmission mechanism in the transmission direction. The first rotating shaft and the second rotating shaft are respectively rotatably arranged in the rocker arm frame and the movable connecting rod. The gear transmission mechanism is arranged in the rotating support. One end of the first rotating shaft is meshed with the power input shaft gear. The other end of the first rotating shaft is drivingly connected to one end of the second transmission shaft through a universal joint. The other end of the second transmission shaft is connected to the input end of the gear transmission mechanism. The output end of the gear transmission mechanism is connected to the wheel shaft.

[0010] Further, one end of the first rotating shaft is provided with a first bevel gear meshed with the power input shaft gear;

[0011] The other end of the second transmission shaft is provided with a second bevel gear meshed with the gear transmission mechanism;

[0012] The gear transmission mechanism is provided with a third transmission shaft located in the rotating support. A third bevel gear meshed with the second bevel gear is fixed at the upper end of the third transmission shaft. A fourth bevel gear is fixed at the lower end of the third transmission shaft. One end of the wheel shaft is meshed with the fourth bevel gear, and the other end is fixedly connected to the wheel.

[0013] Further, the rotation connection point of the movable connecting rod and the rocker arm frame coincides with the rotation point of the universal joint in the vertical direction.

[0014] Further, both the rocker arm frame and the movable connecting rod are hollow tubes. U-shaped rotating frames are provided at the adjacent ends of the rocker arm frame and the movable connecting rod for rotational connection.

[0015] Further, both ends of the first rotating shaft are provided with first bearings, and the first bearings are installed in the rocker arm frame;

[0016] Both ends of the second rotating shaft are provided with second bearings, and the second bearings are installed in the movable connecting rod.

[0017] Further, the first active push rod and the second active push rod are electric push rods or hydraulic push rods.

[0018] Further, a coupling is installed on the main support frame. One end of the coupling is connected to the drive system of the mobile chassis, and the other end is connected to the power input shaft.

[0019] Further, bearings for installing the gear transmission mechanism are provided in the rotating support.

[0020] Further, the present invention also provides a chassis. Double-joint steering drive axles as described above are mounted on the left and right sides of the chassis in the traveling direction. The main support frame is floatingly connected to the chassis.

[0021] The advantages of the present invention are:

[0022] 1) An innovative double-section steering drive axle is proposed. The double section mainly solves two problems. One is the steering problem, which can realize the swing of each wheel. In addition, the wheelbase can be changed by coordinating the steering of the front and rear wheel sets, which increases the applicability of the scene.

[0023] 2) The double-section axle design can achieve a greater angle adjustment for the wheels, and the rotation angle of each wheel can be adjusted individually. The double-section steering drive axles on both sides of the chassis cooperate with the all-wheel drive transmission system to achieve various steering controls such as on-the-spot steering, crab steering, and Ackerman steering;

[0024] 3) The first rotating shaft is connected to the second transmission shaft through a universal joint, and the rotating support is composed of two relatively rotatable rotating sleeves, which can achieve two-level posture adjustment without affecting the power transmission of the internal transmission system;

[0025] 4) The rocker frame and movable connecting rod adopt hollow tube design and have a transmission shaft inside, which reduces the overall weight and protects the transmission shaft;

[0026] 5) The use of electric push rods or hydraulic push rods makes the system drive more efficient.

[0027] 6) Compared with the traditional transverse bridge, the bridge of the present application is a longitudinal bridge (longitudinal bridge), that is, it is located on both sides of the chassis in the direction of travel. This layout enables the vehicle to better cope with different road conditions during driving, and improves driving stability and passability. In addition, the longitudinal bridge design also helps to improve the space utilization of the vehicle, so that the vehicle has a larger internal space without changing the overall size. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0029] Figure 1 This is a structural stereogram of a double-section steering drive axle of the present invention;

[0030] Figure 2 A structural stereogram of a double-section steering drive axle from another perspective;

[0031] Figure 3 A structural stereogram of a double-section steering drive axle from another perspective;

[0032] Figure 4 It is a top view of a double - joint steering drive axle;

[0033] Figure 5 It is a top view of the walking wheels at both the front and rear ends of the double - joint steering drive axle showing a V - shaped distribution;

[0034] Figure 6 It is a side view of the double - joint steering drive axle;

[0035] Figure 7 It is an internal transmission path diagram of the double - joint steering drive axle;

[0036] Figure 8 It is for Figure 7 a partial enlarged view of;

[0037] Figure 9 It is for Figure 8 a sectional view taken along A - A in;

[0038] Figure 10 It is a schematic diagram of the double - joint steering drive axle swinging around the central main support frame;

[0039] Figure 11 It is for corresponding to Figure 10 the attitude diagram of two wheels in the state;

[0040] Figure 12 In another embodiment, it is a schematic diagram of installing the first active push rod on the upper part of the double - joint steering drive axle. Detailed implementation manners

[0041] In the following description, a large number of specific details are given to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, some well - known technical features are not described to avoid confusion with the present invention.

[0042] To thoroughly understand the present invention, detailed steps and detailed structures will be presented in the following description to explain the technical solution of the present invention. The preferred embodiments of the present invention are described in detail below. However, in addition to these detailed descriptions, the present invention can also have other implementation manners.

[0043] Referring to Figure 1 as shown, the present invention provides a double - joint steering drive axle. The double - joint steering drive axle 100 is symmetrically installed on the mobile chassis on the left and right. The double - joint steering drive axle 100 is provided with a main support frame 110. The main support frame 110 is floatingly connected to the chassis, enabling rough ground. The double - joint steering drive axle 100 includes a multi - link support system 120 and a transmission system 130.

[0044] Multi-link support system 120

[0045] The multi-link support system 120 includes a rocker arm 121, and movable links 122, rotating supports 123, and wheels 124 symmetrically installed at both ends of the rocker arm 121. The middle of the rocker arm 121 is vertically rotatably connected to the main support frame 110. Movable links 122 are horizontally rotatably connected to both ends of the rocker arm 121. A first active push rod 125 is connected between the movable link 122 and the rocker arm 121. The rotating support 123 includes two rotatable rotating sleeves up and down. The upper rotating sleeve 123-1 is fixedly connected to the other end of the movable link 122. A second active push rod 126 is connected between the lower rotating sleeve 123-2 and the movable link 122. A wheel 124 is rotatably installed on one side of the lower rotating sleeve 123-2.

[0046] With the above structure, the double-joint steering drive axle of the present invention can achieve a larger swing of the wheels: 1) By means of the telescoping of the first active push rod 125 to drive the rotation between the movable link 122 and the rocker arm 121; realizing the primary attitude adjustment of the wheels, that is, bridge steering; 2) By means of the telescoping of the second active push rod 126 to drive the rotation between the movable link 122 and the lower rotating sleeve 123-2, the wheels can be swung and adjusted again on the basis of the primary attitude adjustment, that is, wheel steering, to achieve a larger swing amplitude of the wheels. At the same time, by adopting a two-stage adjustment method, the adjustment amplitude of the wheels is larger, making the chassis more maneuverable.

[0047] The present invention proposes a double-joint steering drive axle. Through a clever design, the wheels of this structure can achieve a larger swing. This design mainly relies on the telescoping of two active push rods to drive the rotation between the links and the rocker arm. First, the telescoping of the first active push rod 125 can drive the rotation between the movable link 122 and the rocker arm 121. This rotation realizes the primary attitude adjustment of the wheels, which is defined as bridge steering in this application. Secondly, the telescoping of the second active push rod 126 can drive the rotation between the movable link 122 and the lower rotating sleeve 123-2. On the basis of the primary attitude adjustment, this rotation can swing and adjust the wheels again, which is defined as wheel steering in this application. This design makes the swing amplitude of the wheels larger, enabling the vehicle to better adapt to various road conditions during driving. The present invention adopts a two-stage adjustment method, which can make the adjustment amplitude of the wheels larger, and the steering of each wheel can be controlled separately, and more complex steering can be achieved.

[0048] In a preferred embodiment, both the rocker arm 121 and the movable link 122 are hollow tubes to install a transmission system inside the rocker arm 121 and the movable link 122. U-shaped rotating frames are provided at the adjacent ends of the rocker arm 121 and the movable link 122 for rotatable connection, making the rotatable connection more stable and avoiding disconnection.

[0049] In a preferred embodiment, the first active push rod 125 and the second active push rod 126 are electric push rods or hydraulic push rods.

[0050] In a preferred embodiment, the first active push rod 125 can be installed on one side of the balance rocker arm (such as Figure 3 ), or it can be installed on the top (such as Figure 12 ), and the second active push rod 126 is installed at the bottom of the balancing rocker arm to avoid mutual interference.

[0051] Drivetrain 130

[0052] The transmission system 130 includes a power input shaft 131, a front transmission mechanism 132, and a rear transmission mechanism 133. The front transmission mechanism 132 and the rear transmission mechanism 133 are used to drive the front wheels and the rear wheels respectively. The power input shaft 131 is installed in the middle of the main support frame 110 through a bearing, and the other end is connected to the front transmission mechanism 132 and the rear transmission mechanism 133 for transmission.

[0053] The front transmission mechanism 132 and the rear transmission mechanism 133 are respectively provided with a first rotating shaft 134, a second transmission shaft 135 and a gear transmission mechanism 136 in the transmission direction. The first rotating shaft 134 and the second rotating shaft 135 are respectively rotatably arranged in the rocker frame 121 and the movable connecting rod 122, and the gear transmission mechanism 136 is arranged in the rotating support 123.

[0054] One end of the first rotating shaft 134 is gear-engaged with the power input shaft 131, and the other end of the first rotating shaft 134 is transmission-connected to one end of the second transmission shaft 135 through a universal joint 137. The other end of the second transmission shaft 135 is connected to the input end of the gear transmission mechanism 136, and the output end of the gear transmission mechanism 136 is connected to the wheel axle.

[0055] A first bevel gear 134-1 is provided at one end of the first rotating shaft 134 and is gear-engaged with the power input shaft 131. A second bevel gear 135-1 is provided at the other end of the second transmission shaft 135 and is gear-engaged with the gear transmission mechanism 136. The gear transmission mechanism 136 is provided with a third transmission shaft 136-1 located in the rotating support 123, a third bevel gear 136-2 meshing with the second bevel gear 135-1 is fixed to the upper end of the third transmission shaft 136-1, a fourth bevel gear 136-3 is fixed to the lower end of the third transmission shaft 136-1, one end of the wheel shaft is meshed with the fourth bevel gear, and the other end is fixedly connected to the wheel 124.

[0056] A bearing for mounting the third transmission shaft 136 - 1 is provided in the rotation support 123 , so that the rotation of the upper rotation sleeve and the lower rotation sleeve does not affect the rotation of the third transmission shaft 136 - 1 inside.

[0057] The rotation connection point of the movable connecting rod 122 and the rocker arm 121 coincides with the rotation point of the universal joint 137 in the vertical direction, as shown in Figure 8 the dashed line

[0058] Both ends of the first rotating shaft 134 are provided with first bearings 134-2, and the first bearings 134-2 are installed in the rocker arm 121; both ends of the second rotating shaft 135 are provided with second bearings 135-2, and the second bearings 135-2 are installed in the movable connecting rod 122.

[0059] The main support frame 110 is installed with a coupling 101. One end of the coupling 101 is connected to the drive system of the mobile chassis, and the other end is connected to the power input shaft 131.

[0060] As shown in Figure 7 the figure, the transmission path of the transmission system 130 is as follows:

[0061] The power of the drive mechanisms such as the drive motor and internal combustion engine on the mobile chassis is transmitted to the power input shaft 131, and the power input shaft 131 transmits the power to the front transmission mechanism 132 and the rear transmission mechanism 133 simultaneously.

[0062] Taking the power transmission of the front transmission mechanism 132 as an example for illustration: The power of the power input shaft 131 is transmitted to the gear transmission mechanism 136 in the rotating support 123 through the first rotating shaft 134, the universal joint 137, and the second transmission shaft 135 in sequence, and the power is transmitted to the wheel shaft through the fourth bevel gear 136-3 at the lower end of the gear transmission mechanism 136, and finally the driving of the wheel is realized.

[0063] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and the devices and structures not described in detail should be understood to be implemented in a common manner in the art; any person skilled in the art can make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes, without departing from the scope of the technical solution of the present invention, which does not affect the essence of the present invention. Therefore, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the protection of the technical solution of the present invention.

Claims

1. A double-joint steering drive axle. The double-joint steering drive axle (100) is provided with a main support frame (110), characterized in that, The double-section steering drive axle (100) comprises a multi-link support system (120) and a transmission system (130). The multi-link support system (120) comprises a rocker frame (121) and movable links (122), a rotating support (123) and a wheel (124) symmetrically mounted at both ends of the rocker frame (121); the middle portion of the rocker frame (121) is vertically rotatably connected to the main support frame (110); both ends of the rocker frame (121) are horizontally rotatably connected to a movable link (122); a first active push rod (125) is connected between the movable link (122) and the rocker frame (121); the rotating support (123) comprises two upper and lower rotating sleeves that can rotate relative to each other; an upper rotating sleeve (123-1) is fixedly connected to the other end of the movable link (122); a second active push rod (126) is connected between the lower rotating sleeve (123-2) and the movable link (122); and a wheel (124) is rotatably mounted on one side of the lower rotating sleeve (123-2); The transmission system (130) comprises a power input shaft (131), a front transmission mechanism (132), and a rear transmission mechanism (133). The front transmission mechanism (132) and the rear transmission mechanism (133) are used to drive the front wheels and the rear wheels respectively. The power input shaft (131) is installed in the middle of the main support frame (110) through a bearing, and the other end is transmission-connected to the front transmission mechanism (132) and the rear transmission mechanism (133) at the same time. The front transmission mechanism (132) and the rear transmission mechanism (133) are provided with a first rotating shaft (134), a second transmission shaft (135) and a gear transmission mechanism (136) in sequence in the transmission direction; the first rotating shaft (134) and the second rotating shaft (135) are rotatably arranged in the rocker frame (121) and the movable connecting rod (122) respectively; the gear transmission mechanism (136) is arranged in the rotating support (123); one end of the first rotating shaft (134) is meshed with the gear of the power input shaft (131); the other end of the first rotating shaft (134) is transmission-connected to one end of the second transmission shaft (135) through a universal joint (137); the other end of the second transmission shaft (135) is connected to the input end of the gear transmission mechanism (136); and the output end of the gear transmission mechanism (136) is connected to the wheel shaft.

2. A double-section steering drive axle as claimed in claim 1, characterized in that: A first bevel gear (134-1) is provided at one end of the first rotating shaft (134) and is gear-engaged with the power input shaft (131); The other end of the second transmission shaft (135) is provided with a second bevel gear (135-1) meshing with the gear transmission mechanism (136); The gear transmission mechanism (136) is provided with a third transmission shaft (136-1) located within the rotating support (123). A third bevel gear (136-2) meshing with the second bevel gear (135-1) is fixed to the upper end of the third transmission shaft (136-1), and a fourth bevel gear (136-3) is fixed to the lower end of the third transmission shaft (136-1). One end of the wheel shaft meshes with the fourth bevel gear, and the other end is fixedly connected to the wheel (124).

3. A double-joint steering drive axle according to claim 1, characterized in that, The rotation connection point of the movable connecting rod (122) and the rocker arm (121) coincides with the rotation point of the universal joint (137) in the vertical direction.

4. A double-joint steering drive axle according to claim 1, wherein, Both the rocker arm (121) and the movable connecting rod (122) are hollow tubes, and U-shaped rotating frames are provided at the adjacent ends of the rocker arm (121) and the movable connecting rod (122) for rotational connection.

5. A double-joint steering drive axle according to claim 4, characterized in that, Both ends of the first rotating shaft (134) are provided with first bearings (134-2), and the first bearings (134-2) are installed within the rocker arm (121). Both ends of the second rotating shaft (135) are provided with second bearings (135-2), and the second bearings (135-2) are installed within the movable connecting rod (122).

6. A double-joint steering drive axle according to claim 1, wherein, The first active push rod (125) and the second active push rod (126) are electric push rods or hydraulic push rods.

7. A double-joint steering drive axle according to claim 1, characterized in that, The main support frame (110) is installed with a coupling (101). One end of the coupling (101) is connected to the drive system of the chassis, and the other end is connected to the power input shaft (131).

8. The double-joint steering drive axle according to claim 2, wherein, Bearings for installing the third transmission shaft (136-1) are provided within the rotating support (123).

9. A chassis, characterized in that, On the left and right sides of the chassis in the traveling direction, double-joint steering drive axles as described in any one of claims 1-8 are carried, and the main support frame (110) is floatingly connected to the chassis.

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