Steering wheel suspension mechanism with four guide shafts

Abstract

The utility model discloses a steering wheel suspension mechanism with four guide shafts. The steering wheel suspension mechanism comprises a horizontal steering wheel, a guide sleeve assembly, a guide shaft assembly, a damping component and a limiting component, the horizontal steering wheel is connected with the guide sleeve assembly through the rotary supporting assembly, and the upper end of the guide sleeve assembly is connected with the guide shaft assembly. A limiting part is arranged between the guide shaft assembly and the guide sleeve assembly; the guide shaft assembly is sleeved with the guide sleeve assembly, a damping component is arranged in the guide sleeve assembly, and the guide shaft assembly floats up and down in the direction of a central line shaft of the guide sleeve assembly. The four-guide-shaft floating structure enables the steering wheel to be parallel to the upper frame all the time, stability of the posture of the steering wheel is guaranteed, the straight-up and straight-down floating mode can also guarantee complete contact between the steering wheel and the ground, the steering wheel is evenly stressed, and the service life of the steering wheel is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of steerable wheel suspensions, and particularly to a steerable wheel suspension mechanism with four guide shafts. Background Art

[0002] A steerable wheel suspension mechanism is a device used to support and connect a steerable wheel, mainly applied to various vehicles or mechanical equipment to ensure stable contact between the steerable wheel and the ground, and guarantee the safety and stability of driving or operation. Traditional steerable wheel suspension mechanisms usually adopt shock-absorbing components or shock absorbers and other elements to achieve the up-and-down floating of the steerable wheel to adapt to the undulations of different road surfaces, but there are some problems, such as unstable contact between the steerable wheel and the ground, and easy occurrence of skidding.

[0003] In order to solve the problems existing in traditional steerable wheel suspension mechanisms, some new steerable wheel suspension mechanisms have emerged. For example, some steerable wheel suspension mechanisms adopt the structure of a guide shaft assembly and a guide sleeve assembly, and realize the flexible guiding and up-and-down floating of the steerable wheel through the relative sliding of the guide shaft and the oil-free bushing. However, some existing steerable wheel suspension mechanisms still have some deficiencies. For example, when encountering large depressions or protrusions, they cannot effectively protect the shock-absorbing components or shock absorbers, resulting in uneven force on the steerable wheel and shortened service life.

[0004] Therefore, it is necessary to provide a new type of steerable wheel suspension mechanism that can effectively protect the shock-absorbing components or shock absorbers while ensuring stable contact between the steerable wheel and the ground, extend the service life of the steerable wheel, and improve the safety and stability of driving or operation. Summary of the Invention

[0005] The purpose of the utility model is to solve the defects existing in the prior art, and a steerable wheel suspension mechanism with four guide shafts is proposed.

[0006] To achieve the above purpose, the technical scheme adopted by the utility model is as follows: A steerable wheel suspension mechanism with four guide shafts, including a horizontal steerable wheel, a guide sleeve assembly, a guide shaft assembly, a shock-absorbing component, and a limiting component; the horizontal steerable wheel is connected to the guide sleeve assembly through a slewing bearing assembly, and the upper end of the guide sleeve assembly is connected with a guide shaft assembly; a limiting component is arranged between the guide shaft assembly and the guide sleeve assembly; the guide shaft assembly is sleeved in the guide sleeve assembly, a shock-absorbing component is arranged in the guide sleeve assembly, and the guide shaft assembly floats up and down along the central axis direction of the guide sleeve assembly.

[0007] Preferably, the guide sleeve assembly is composed of an oil-free bushing, a steerable wheel mounting bracket, and a bushing gland; bushing mounting holes are symmetrically arranged at the front and rear ends of the steerable wheel mounting bracket; four oil-free bushings are installed in the bushing mounting holes of the steerable wheel mounting bracket; the bushing gland is installed above the bushing mounting hole and is fixedly connected to the steerable wheel mounting bracket through bolts passing through the mounting flange at the upper end of the oil-free bushing.

[0008] Preferably, the guide shaft assembly includes a connecting plate, a guide bushing, a shock-absorbing component pressing plate, and a shock-absorbing component adjusting screw; the lower surface of the connecting plate is fixedly connected to the upper end of the guide bushing; a shock-absorbing component pressing plate is arranged at the upper end inside the guide bushing; the shock-absorbing component adjusting screw passes through the connecting plate and its lower end is fixedly connected to the shock-absorbing component pressing plate; the connecting plate is provided with a guide shaft mounting hole corresponding to the position of the bushing mounting hole of the steering wheel mounting bracket.

[0009] Preferably, the limiting component passes through the guide hole of the guide shaft assembly and its lower end is fixedly connected to the guide sleeve assembly, and the limiting component is a screw with a threaded lower end and a smooth rod in the middle.

[0010] Preferably, the guide bushing includes a bushing body and a lubricating groove; the bushing body is a hollow toroidal structure, and lubricating grooves are uniformly arranged on the circumference of the bushing body; a lubricating medium is placed in the lubricating grooves.

[0011] Preferably, a graphite lubricating strip is installed in the lubricating groove, and the outer arc of the graphite lubricating strip is the same as the outer diameter of the bushing body.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. Through the design of the guide sleeve assembly and the guide shaft assembly, effective shock absorption is achieved, protecting the steering wheel from excessive compression, and improving the stability and safety of the suspension system.

[0014] 2. The designed limiting component can limit the floating range of the guide sleeve assembly in case of uneven ground, ensure the stable contact force between the steering wheel and the ground, and ensure the stable driving force output of the driving unit.

[0015] 3. The adoption of shock-absorbing components can effectively absorb the impact force caused by ground unevenness, extend the service life of the steering wheel, and reduce the maintenance cost of the suspension system.

[0016] 4. The lubricating grooves and lubricating medium are arranged inside the guide bushing, which can reduce the wear of the guide bushing during the shock-absorbing process, and improve the service life and stability of the suspension system.

[0017] 5. The four-guide-shaft floating structure of the suspension mechanism ensures that the steering wheel is always parallel to the upper frame, maintains the stable attitude of the steering wheel, makes the force on the steering wheel uniform, further extends the service life of the steering wheel, and improves the performance and reliability of the entire vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the utility model;

[0019] Figure 2 is Figure 1 the A-A sectional view of

[0020] Figure 3 Schematic diagram of the mating connection between the guide sleeve assembly and the guide shaft assembly of the present utility model;

[0021] Figure 4 Schematic diagram of the installation structure of the shock-absorbing component of the present utility model;

[0022] Figure 5 Schematic diagram of the installation structure of the limiting component of the present utility model;

[0023] Figure 6 Bottom view of the present utility model;

[0024] Figure 7 Schematic diagram of the structure of the guide shaft sleeve of the present utility model;

[0025] Figure 8 Bottom view of the guide shaft sleeve of the present utility model;

[0026] Figure 9 Schematic diagram of the structure of another embodiment of the guide shaft sleeve of the present utility model

[0027] In the figure: horizontal steering wheel 1, guide sleeve assembly 2, guide shaft assembly 3, shock-absorbing component 4, limiting component 5; oil-free bushing 21, steering wheel mounting bracket 22, bushing gland 23, connecting plate 31, guide shaft sleeve 32, shock-absorbing component pressing plate 33, shock-absorbing component adjusting screw 34. Detailed implementation manners

[0028] The following description is used to disclose the present utility model so that those skilled in the art can implement the present utility model. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations.

[0029] As Figures 1-9 shown, a steering wheel suspension mechanism with four guide shafts includes a horizontal steering wheel 1, a guide sleeve assembly 2, a guide shaft assembly 3, a shock-absorbing component 4, and a limiting component 5;

[0030] There is Figure 1 shown, the horizontal steering wheel 1 is connected to the guide sleeve assembly 2 through a slewing support assembly, and the upper end of the guide sleeve assembly 2 is connected to a guide shaft assembly 3; a limiting component 5 is arranged between the guide shaft assembly 3 and the guide sleeve assembly 2; a shock-absorbing component 4 is installed inside the guide sleeve assembly 2.

[0031] Specifically, the upper end of the horizontal steering wheel 1 is a slewing support assembly, and the horizontal steering wheel 1 is fixedly connected to the outer ring of the slewing support assembly through bolts, and the outer ring of the slewing support assembly is connected to the guide sleeve assembly 2 through bolts, and the inner ring and the outer ring of the slewing support can rotate through gear drive.

[0032] Specifically, by Figure 1 combined with Figure 4 , the guide shaft assembly 3 is sleeved inside the guide sleeve assembly 2. A shock-absorbing member 4 is arranged inside the guide sleeve assembly 2, and the guide shaft assembly 3 floats up and down along the central axis direction of the guide sleeve assembly 2.

[0033] Specifically, by Figure 3 shown, the limiting member 5 passes through the guide hole of the guide shaft assembly 3 and its lower end is fixedly connected to the guide sleeve assembly 2. The limiting member 5 adopted in this embodiment is a screw with a threaded lower end and a smooth rod in the middle end.

[0034] By Figure 1 , 2 shown, the guide sleeve assembly 2 is composed of an oil-free bushing 21, a steering wheel mounting bracket 22, and a bushing gland 23; bushing mounting holes are symmetrically arranged at the front and rear ends of the steering wheel mounting bracket 22; four oil-free bushings 21 are installed in the bushing mounting holes of the steering wheel mounting bracket 22; the bushing gland 23 is installed above the bushing mounting hole and is fixedly connected to the steering wheel mounting bracket 22 by bolts passing through the mounting flange at the upper end of the oil-free bushing 21 to prevent the oil-free bushing 21 from moving; the horizontal steering wheel 1 is installed on the steering wheel mounting bracket 22 through a slewing support assembly.

[0035] By Figure 1 , 2 shown, the guide shaft assembly 3 includes a connecting plate 31, a guide shaft sleeve 32, a shock-absorbing member pressing plate 33, and a shock-absorbing member adjusting screw 34; the lower surface of the connecting plate 31 is fixedly connected to the connecting flange at the upper end of the guide shaft sleeve 32; a shock-absorbing member pressing plate 33 is arranged at the upper end inside the guide shaft sleeve 32; the shock-absorbing member adjusting screw 34 passes through the connecting plate 31 and its lower end is fixedly connected to the shock-absorbing member pressing plate 33; the connecting plate 31 is provided with guide shaft mounting holes corresponding to the positions of the bushing mounting holes of the steering wheel mounting bracket 22; nuts are arranged at the upper ends of the guide shaft mounting holes, and the nuts are threadedly connected to the shock-absorbing member adjusting screws 34. By rotating the shock-absorbing member adjusting screws 34 to adjust the height of the shock-absorbing member pressing plate 33, the height of the shock absorption can be adjusted.

[0036] Put four shock-absorbing members 4 into the inner cavity of the oil-free bushing 21. The shock-absorbing member 4 in this embodiment is a spring; the shock-absorbing member pressing plate 33 is in contact connection with the upper end of the shock-absorbing member 4.

[0037] There is Figures 3-5 shown, the limiting member 5 passes through the guide hole of the connecting plate 31 in the guide shaft assembly 3, is installed in the screw hole of the steering wheel mounting bracket 22 of the guide sleeve assembly 2, and floats up and down together with the guide sleeve assembly 2 to prevent the guide sleeve assembly 2 and the guide shaft assembly 3 from separating.

[0038] As Figures 7-9As shown, the guide sleeve 32 includes a sleeve body 321 and a lubrication groove 322; the sleeve body 321 is a hollow annular structure, and the lubrication grooves 322 are evenly arranged on the circumference of the sleeve body 321; and a lubricating medium is placed in the lubrication grooves 322. Further, the lubrication grooves 322 can be distributed in an array around the center line of the sleeve body 321, or can be distributed in a spiral shape on the outside of the sleeve body 321.

[0039] Specifically, in the present embodiment, a graphite lubricating strip is installed in the lubrication groove 322, and the outer arc of the graphite lubricating strip is the same as the outer diameter of the sleeve body 321; it should be noted that the lubricating medium can be a graphite lubricating strip, or a soft metal such as copper, aluminum or lubricating butter, which is used to reduce the wear of the guide sleeve 32 during the up and down shock absorption process.

[0040] Working principle: The connecting plate 31 of the guide shaft assembly 3 of this suspension mechanism is connected to the upper frame, and the horizontal steering wheel 1 contacts the ground. When the ground is convex during operation, the shock-absorbing component 4 supported in the guide sleeve 32 is compressed, and the guide sleeve assembly 2 floats upward, and the four guide sleeves 32 slide relative to the oil-free bushing 21 at the same time. When the ground convexity is too large, the guide sleeve 32 contacts the bottom of the oil-free bushing 21 hole of the steering wheel mounting bracket 22, and the guide sleeve assembly 2 no longer floats upward, thereby protecting the shock-absorbing component 4 from being over-compressed; when the ground is concave during operation, the shock-absorbing component 4 supported in the guide sleeve 32 is extended, and the guide sleeve assembly 2 floats downward, and the four guide sleeves 32 slide relative to the oil-free bushing 21 at the same time. Therefore, the contact force between the horizontal steering wheel 1 and the slightly undulating ground will not change greatly, thereby ensuring the stability of the driving force of the drive unit. Due to the existence of the limiting component 5, when there is a large and deep depression on the ground, after the guide sleeve assembly 2 floats downward for a certain distance, the limiting component 5 contacts the connecting plate 31 of the guide shaft assembly 3, and the guide sleeve assembly 2 no longer floats downward. The floating structure of the four guide shafts can make the steering wheel always parallel to the upper frame, ensuring the stability of the steering wheel posture, and the straight up and down floating form can also ensure that the steering wheel is in full contact with the ground, so that the steering wheel is evenly stressed and the service life of the steering wheel is extended.

[0041] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the utility model. The utility model may be subject to various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A steering wheel suspension mechanism with four guide shafts, characterized in that: The invention comprises a horizontal steering wheel (1), a guide sleeve assembly (2), a guide shaft assembly (3), a shock absorbing component (4), and a position limiting component (5); the horizontal steering wheel (1) is connected to the guide sleeve assembly (2) via a slewing support assembly, and the guide sleeve assembly (2) is connected to the guide shaft assembly (3); a position limiting component (5) is arranged between the guide shaft assembly (3) and the guide sleeve assembly (2); the shock absorbing component (4) is arranged in the guide sleeve assembly (2), and the guide shaft assembly (3) floats up and down along the center axis direction of the guide sleeve assembly (2).

2. A four-guide-axle steering wheel suspension mechanism according to claim 1, characterized in that: The guide sleeve assembly (2) is composed of an oil-free bushing (21), a steering wheel mounting bracket (22), and a bushing pressure cover (23); bushing mounting holes are symmetrically arranged at the front and rear ends of the steering wheel mounting bracket (22); four oil-free bushings (21) are installed in the bushing mounting holes of the steering wheel mounting bracket (22); the bushing pressure cover (23) is installed above the bushing mounting holes and is fixedly connected to the steering wheel mounting bracket (22) by bolts passing through the mounting flange at the upper end of the oil-free bushing (21).

3. The four-guide-axle steering wheel suspension mechanism according to claim 1, characterized in that: The guide shaft assembly (3) comprises a connecting plate (31), a guide shaft sleeve (32), a damping component pressing plate (33), and a damping component adjusting screw (34); the lower surface of the connecting plate (31) and the upper end of the guide shaft sleeve (32) are fixedly connected; the inner upper end of the guide shaft sleeve (32) is provided with a damping component pressing plate (33); the damping component adjusting screw (34) passes through the connecting plate (31) and its lower end is fixedly connected to the damping component pressing plate (33); the connecting plate (31) is provided with a guide shaft mounting hole corresponding to the position of the bushing mounting hole of the steering wheel mounting bracket (22).

4. The steering wheel suspension mechanism with four guide shafts according to claim 1, characterized in that: The limiting component (5) passes through the guide hole of the guide shaft assembly (3) and its lower end is fixedly connected to the guide sleeve assembly (2); the limiting component (5) is threaded at the lower end and has a screw of a polished rod at the middle end.

5. The four-guide-axle steering wheel suspension mechanism according to claim 3, characterized in that: The guide shaft sleeve (32) comprises a shaft sleeve body (321) and a lubrication groove (322); the shaft sleeve body (321) is a hollow annular structure, and the lubrication grooves (322) are evenly arranged on the circumference of the shaft sleeve body (321); and a lubrication medium is placed in the lubrication groove (322).

6. A four-guide-axle steering wheel suspension mechanism according to claim 5, characterized in that: A graphite lubricating strip is installed in the lubricating groove (322), and the outer arc of the graphite lubricating strip is the same as the outer diameter of the shaft sleeve body (321).

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