Wheel corner zero locking device suitable for rescue of electronic guide rubber-tyred vehicle

Abstract

The invention provides a wheel corner zero-locking device suitable for rescue of an electronic guide rubber wheel vehicle, and relates to the technical field of vehicle steering, the wheel corner zero-locking device comprises a zero-locking device body installed between an axle main pin and a steering knuckle, the zero-locking device body comprises a spline pair and an actuator, the actuator comprises a shell, an actuating pressing plate, a rigid spring and a base, the actuating pressing plate is connected with a lower spline of the spline pair, the shell and the base are connected through threads, and the actuating pressing plate and the spline pair can move along the shell and the base. And closed spaces are formed between the shell and the actuating pressing plate, and a rigid spring is arranged in one of the closed spaces. According to the zero locking device, under the condition that a steering control system or a power-assisted steering system of the electronic guide rubber wheel vehicle fails, zero rigid locking which is easy to operate and high in reliability can be provided for the vehicle, it is guaranteed that the vehicle can normally run under the large turning radius, and the work of clearing passengers, returning to a garage and the like is completed.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle steering, and in particular to a wheel angle locking device suitable for rescuing electronically guided rubber-wheeled vehicles. Background Art

[0002] Usually, electronically guided rubber-wheeled vehicles are designed with multi-axis active steering systems to meet the requirements of multiple groups, long wheelbase and small turning radius, and to improve the vehicle's terrain passability. Multi-axis active steering systems can achieve smaller turning radius and more flexible movement. However, during vehicle operation, abnormalities in the multi-axis active steering system can cause the wheels to lose control and be unable to return to the center position, resulting in body tail swinging and folding.

[0003] The Chinese patent (publication number CN219790278U) is a rear axle steering neutral locking system, which includes a steering oil pump, an overflow valve, a charging valve, a reversing valve, an accumulator, a locking valve and a locking oil cylinder. The system is used for rear axle steering locking of wheeled vehicles in the field of engineering machinery. The rear axle steering locking function is implemented using a hydraulic valve. The hydraulic oil pump is the power source of the locking system. The hydraulic valve controls the opening and closing of the locking system, and the locking oil cylinder performs the locking function. The method for implementing the function of the device is as follows: when the locking function is required, the hydraulic valve works, the valve core switches the passage, the hydraulic oil pump is connected to the accumulator and the locking valve oil circuit, the oil pump pumps out a part of the high-pressure oil to charge the accumulator, and a part flows to the locking valve and the locking oil cylinder to perform the locking function. When the high-pressure oil is sufficient, the hydraulic valve cuts back the passage, the oil pump and accumulator, and the locking valve oil circuit are closed, and the accumulator, locking valve, and locking cylinder form a closed high-pressure oil circuit, which can maintain the locking function continuously. However, due to the high oil pressure in the closed oil circuit, there will be a certain amount of leakage inside the valve body. When the high-pressure oil leakage pressure drops to a certain level, it will be re-pressurized and repeat the above process.

[0004] A Chinese patent (publication number CN219790278U) discloses a rear axle steering neutral locking system, which is only applicable to the rear axle of a two-axle vehicle; the locking mechanism relies on a hydraulic transmission system, which is prone to seal failure and oil leakage; the whole system has many devices, a complex structure, a large number of parts, low reliability, large space occupation, and high maintenance cost. It cannot meet the application requirements of the electronically guided rubber-wheeled vehicle rescue condition of the multi-axle active steering system.

[0005] Therefore, based on the above-mentioned technical problems, the present invention invents a wheel angle locking device that can provide the vehicle with an easy-to-operate and highly reliable zero-position rigid locking mechanism in the event of a steering power pump failure or a steering control system failure. Summary of the invention

[0006] According to the above technical problem that the abnormality of the multi-axis active steering system may cause the wheels to lose control and be unable to return to the center position, resulting in the body swinging and folding, a wheel angle locking device suitable for electronically guided rubber-wheeled vehicle rescue is provided. The present invention mainly installs the locking device between the kingpin and the steering clevis of the axle, so that the locking device can control the locking of a single-side wheel on a single axle alone, or control all wheels to be locked at the same time.

[0007] The technical means adopted by the present invention are as follows:

[0008] A wheel angle locking device suitable for rescuing electronically guided rubber-tyred vehicles comprises a locking device installed between a kingpin and a steering clevis of an axle, the locking device comprises a spline pair and an actuator, the actuator comprises a housing, an actuating pressure plate, a rigid spring and a base, the actuating pressure plate is connected to a lower spline of the spline pair, the housing and the base are connected by threads, the actuating pressure plate and the spline pair can move along the housing and the base; a closed space is formed between the housing and the actuating pressure plate, and a rigid spring is arranged in one of the closed spaces.

[0009] Furthermore, the spline pair includes an upper spline and a lower spline, the upper spline is connected to the axle through a kingpin; the lower spline and the actuator are connected to the wheel through a steering clevis.

[0010] Furthermore, the lower spline is connected to the actuating pressure plate by interference fit.

[0011] Furthermore, grooves are respectively provided inside the shell and outside the base; guide rails are provided outside the lower spline and inside the actuating pressure plate, and the guide rails can move along the grooves in the axial direction of the locking device.

[0012] Furthermore, two closed cavities are formed between the shell and the actuating platen.

[0013] Furthermore, the enclosed cavity at the upper part is a brake cylinder; and a rigid spring is arranged in the enclosed cavity at the lower part.

[0014] Furthermore, the rigid spring is arranged on the outer wall of the actuating pressure plate.

[0015] Furthermore, the brake cylinder is connected to the actuator via a hose, and the brake air chamber provides compressed air to the actuator.

[0016] The working principle is:

[0017] When the vehicle is working normally, the compressed gas enters the brake cylinder through the hose, pushing the actuating pressure plate to offset the compression force of the rigid spring. At this time, the lower spline limit device contacts the housing, the lower spline does not mesh with the upper spline, the lock device is in a relieved state, and the wheel and the axle can rotate relative to each other;

[0018] When the vehicle is in a rescue condition, the locking device or manual operation discharges the compressed air in the brake cylinder, and the actuating pressure plate is pushed out along the guide rail axially under the action of the rigid spring, the lower spline engages with the upper spline, the locking device is in a locked state, and the wheels and the axle are in a rigid locked state and cannot rotate relative to each other. At this time, the wheels are in a towing state and can travel normally at a larger turning radius to complete tasks such as clearing passengers and returning to the warehouse;

[0019] When the electronically guided rubber-tyred vehicle is traveling at high speed, the zero lock device is adjusted to the locked position to actively lock the wheel angle at zero position to ensure the stability of the vehicle at high speed.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] The present invention adopts a spline pair to realize the rigid locking between the wheel and the axle, and realizes the zero-position locking function when the whole vehicle loses power; the rigid spring is the power source of the zero-angle locking, and the compressed air is the relief source of the zero-angle locking device of the device; the device can independently control the zero locking of a single-axle single-side wheel, and can also control the simultaneous locking of multiple axles and multiple wheels.

[0022] The locking device of the present invention also has a safety protection design. When the brake cylinder leaks or the air compressor in the vehicle fails or the compressed gas pressure is insufficient, the locking device will automatically enter the locking device to ensure that the angle between the wheel and the axle is fixed to avoid wheel folding or tail swinging.

[0023] The zero-locking device of the present invention can provide the electronically guided rubber-wheeled vehicle with an easy-to-operate and highly reliable zero-position rigid locking when the steering control system or the steering assist system fails, ensuring that the vehicle can travel normally at a large turning radius and complete tasks such as clearing passengers and returning to the warehouse. The device can achieve rigid locking with high locking strength, high reliability, maintenance-free, low cost of use, and small installation and use space. It greatly reduces the reliance on electronic control, and can complete the zero-locking of the corner in emergency situations when the entire vehicle loses power or the parking brake fails, preventing the vehicle from folding and drifting, and has good safety; it has a high degree of compatibility with electronically guided rubber-wheeled vehicles using air brakes. The novel and alternative structural design and low space requirements also provide new design ideas for the all-wheel active steering system of electronically guided rubber-wheeled vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are 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.

[0025] Figure 1 It is a schematic diagram of the structure of the zero locking device of the present invention.

[0026] Figure 2 It is a cross-sectional view of the locking device of the present invention.

[0027] Figure 3 It is a schematic diagram of the zero locking device of the present invention in the relief position.

[0028] Figure 4 It is a schematic diagram of the zero locking device of the present invention in the locked position.

[0029] Figure 5 It is a schematic diagram of the rear axle steering center locking system in the prior art.

[0030] In the figure: 1. upper spline; 2. lower spline; 3. housing; 4. brake cylinder; 5. actuating pressure plate; 6. rigid spring; 7. base; 8. axle kingpin; 9. steering clevis; 10. locking device. DETAILED DESCRIPTION

[0031] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0034] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, the numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0035] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0036] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0037] like Figure 1-5As shown, the present invention provides a wheel angle locking device suitable for rescuing electronically guided rubber-tyred vehicles, which is suitable for electronically guided rubber-tyred vehicles equipped with multi-axle active steering systems, and the locking device is installed between the kingpin of the axle and the steering clevis. The locking device is divided into two parts: a spline pair and an actuator; the upper spline 1 in the spline pair is connected to the lower end of the axle kingpin, and the lower spline 2 in the spline pair and the actuator are installed on the steering clevis and move with the steering of the wheel. The actuator is connected to the brake cylinder 4 through a hose, and the brake cylinder 4 provides compressed air to the actuator. When the active guiding system fails or the steering oil pump has a problem, the locking device starts to work, and the actuator pushes the upper spline 1 to engage with the lower spline 2, and then the zero-position rigid locking is achieved between the wheel and the axle kingpin. For multi-axle vehicles, the locking device can control the zero locking of a single-axle single-side wheel individually, or control all wheels to lock at the same time.

[0038] Specifically, it includes an upper spline 1, a lower spline 2, a housing 3, a brake cylinder 4, an actuating pressure plate 5, a rigid spring 6, and a base 7. The upper spline 1 is connected to the axle through a kingpin; the lower spline 2 and the actuator are connected to the wheel through a steering horn. The actuator consists of a housing 3, an actuating pressure plate 5, a rigid spring 6, and a base 7. The housing 3 and the base 7 are connected by threads; the lower spline 2 and the actuating pressure plate 5 are assembled together by interference fit; the inside of the housing 3 and the outside of the base 7 are grooved, and the outside of the lower spline 2 and the inside of the actuating pressure plate 5 are provided with guide rails, and the two can move along the groove in the axial direction of the locking device. The enclosed cavity formed between the housing 3 and the actuating pressure plate 5 is the brake cylinder 4; the rigid spring 6 is installed between the base 7 and the actuating pressure plate 5.

[0039] The zero lock device has two position states: a relief position and a locked position. When the electronically guided rubber-tyred vehicle is in normal working condition, the zero lock device is in the relief position; when the vehicle's active guidance system fails or the steering oil pump has a problem, the zero lock device is in the locked position.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wheel angle locking device suitable for rescuing electronically guided rubber-tyred vehicles, characterized in that: The invention comprises a locking device installed between the kingpin and the steering clevis of an axle, the locking device comprising a spline pair and an actuator, the actuator comprising a housing (3), an actuating pressure plate (5), a rigid spring (6) and a base (7), the actuating pressure plate (5) being connected to a lower spline (2) of the spline pair, the housing (3) and the base (7) being connected via a thread, the actuating pressure plate (5) and the spline pair being movable along the housing (3) and the base (7); a closed space is formed between the housing (3) and the actuating pressure plate (5), and a rigid spring (6) is arranged in one of the closed spaces.

2. The wheel angle locking device for electronically guided rubber-tyred vehicle rescue according to claim 1, characterized in that: The spline pair comprises an upper spline (1) and a lower spline (2); the upper spline (1) is connected to the axle via a kingpin; the lower spline (2) and the actuator are connected to the wheel via a steering clevis.

3. The wheel angle locking device for electronically guided rubber-tyred vehicle rescue according to claim 2, characterized in that: The lower spline (2) is connected to the actuating pressure plate (5) by interference fit.

4. The wheel angle locking device for electronically guided rubber-tyred vehicle rescue according to claim 1, characterized in that: The inside of the housing (3) and the outside of the base (7) are respectively provided with grooves; the outside of the lower spline (2) and the inside of the actuating pressure plate (5) are provided with guide rails, and the guide rails can move along the grooves in the axial direction of the locking device.

5. The wheel angle locking device for rescuing an electronically guided rubber-tyred vehicle according to claim 1, characterized in that: Two closed cavities are formed between the housing (3) and the actuating pressure plate (5).

6. The wheel angle locking device for rescuing an electronically guided rubber-tyred vehicle according to claim 5, characterized in that: The upper enclosed cavity is a brake cylinder (4); and a rigid spring (6) is arranged in the lower enclosed cavity.

7. The wheel angle locking device for rescuing an electronically guided rubber-tyred vehicle according to claim 6, characterized in that: The rigid spring (6) is arranged on the outer wall of the actuating pressure plate (5).

8. The wheel angle locking device for rescuing an electronically guided rubber-tyred vehicle according to claim 6, characterized in that: The brake cylinder (4) is connected to the actuator via a hose, and the brake air chamber provides compressed air to the actuator.

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