阅读说明：本技术 转向轴的减震联轴器、转向系统和车辆 (Damping coupling of steering shaft, steering system and vehicle ) 是由 候小玉 税建敏 杨洪斌 何锐 刘勇 杨渝民 聂胤 高成军 陈昌龙 于 2021-09-14 设计创作，主要内容包括：本发明公开了一种转向轴的减震联轴器、转向系统和车辆,其中所述的转向轴的减震联轴器,包括依次设置的传动轴套管、连接板、弹性胶盘和节叉；所述连接板连接于所述传动轴套管的端部；还包括两个分别设于所述弹性胶盘两侧的连接支架,其中,靠近所述节叉一侧的连接支架通过一组穿过弹性胶盘的连接件与所述连接板连接,靠近所述连接板一侧的连接支架通过另一组穿过弹性胶盘的连接件与所述节叉连接；所述弹性胶盘与所述连接板之间连接件以及所述弹性胶盘与所述节叉之间的连接件上均套装有支撑套管。本发明通过弹性胶盘可一定程度吸收从底盘传来的各方向上的震动,从而使驾乘感更舒适。(The invention discloses a shock absorption coupler of a steering shaft, a steering system and a vehicle, wherein the shock absorption coupler of the steering shaft comprises a transmission shaft sleeve, a connecting plate, an elastic rubber disc and a joint fork which are sequentially arranged; the connecting plate is connected to the end part of the transmission shaft sleeve; the connecting bracket close to one side of the joint fork is connected with the connecting plate through one group of connecting pieces penetrating through the elastic rubber disc, and the connecting bracket close to one side of the connecting plate is connected with the joint fork through the other group of connecting pieces penetrating through the elastic rubber disc; and supporting sleeves are sleeved on the connecting pieces between the elastic rubber disc and the connecting plate and the connecting pieces between the elastic rubber disc and the joint fork. The invention can absorb the vibration in all directions transmitted from the chassis to a certain degree through the elastic rubber disc, thereby ensuring that the riding sense is more comfortable.)

1. A damping coupling of a steering shaft is characterized in that: comprises a transmission shaft sleeve (5), an elastic rubber disc (1) and a joint fork (7) which are connected in sequence.

2. The damping coupling of claim 1 wherein: the centering device also comprises a centering mandrel (9) which is coaxially arranged with the transmission shaft sleeve (5); through holes for the centering mandrel (9) to freely pass through are formed in the elastic rubber disc (1) and the joint fork (7); one end of the centering mandrel (9) is connected with the transmission shaft sleeve (5), and the other end freely extends into the through holes of the elastic rubber disc (1) and the joint fork (7).

3. The damping coupling of claim 1 wherein: the damping coupling further comprises a connecting plate (3) and a connecting bracket (2); the connecting plate (3) is connected to the end part, close to the joint fork (7), of the transmission shaft sleeve (5); the two connecting supports (2) are respectively arranged at two sides of the elastic rubber disc (1), wherein the connecting support (2) close to one side of the joint fork (7) is connected with the connecting plate (3) through a group of connecting pieces penetrating through the elastic rubber disc (1), and the connecting support (2) close to one side of the connecting plate (3) is connected with the joint fork (7) through another group of connecting pieces penetrating through the elastic rubber disc (1); and a support sleeve (11) is sleeved on the connecting piece between the elastic rubber disc (1) and the connecting plate (3) and the connecting piece between the elastic rubber disc (1) and the joint fork (7).

4. A damping coupling according to claim 3 wherein: the connecting piece connected with the connecting plate (3) simultaneously penetrates through the connecting bracket (2) close to one side of the connecting plate (3); the connecting piece connected with the joint fork (7) simultaneously penetrates through the connecting bracket (2) close to one side of the joint fork (7).

5. The damping coupling of claim 4 wherein: the structure of the connecting support (2) for the connecting piece to pass through is a through hole or a groove, and the shape of the through hole or the groove is consistent with that of the cross section of the connecting piece.

6. The damping coupling of claim 5 wherein: the supporting sleeve (11) is sleeved with an anti-collision sleeve (10).

7. A damping coupling according to claim 3 wherein: the centering device also comprises a centering mandrel (9) which is coaxially arranged with the transmission shaft sleeve (5); through holes for the centering mandrel (9) to freely pass through are formed in the elastic rubber disc (1), the connecting bracket (2) and the joint fork (7); one end of the centering mandrel (9) is connected with the connecting plate (3), and the other end of the centering mandrel freely extends into the through holes of the elastic rubber disc (1), the support (2) and the joint fork (7).

8. A damping coupling according to claim 2 or 7, wherein: and a centering sleeve (8) is arranged between the centering mandrel (9) and the through hole of the joint fork (7).

9. A steering system, characterized by: comprising a damping coupling according to any one of claims 1-7.

10. A vehicle, characterized in that: comprising a damping coupling according to any one of claims 1-7.

Technical Field

The invention relates to the technical field of steering shafts of vehicles, in particular to a damping coupling of a steering shaft, a steering system and a vehicle.

Background

The steering shaft has the function of transmitting the steering torque of the driver acting on the steering wheel to the steering gear, the upper part of the steering shaft is fixedly connected with the steering wheel, and the lower part of the steering shaft is connected with the steering gear. The steering shaft passes through the steering column tube and is supported on bearings and bushings in the column tube. Some steering shafts not only have certain rigidity, but also have an energy absorption function, and have an anti-injury effect.

When the vehicle runs on a non-smooth road surface, certain vibration is transmitted to the steering wheel from the chassis through the steering column tube, so that the driving comfort is influenced. There is some passenger car models, because of chassis damping performance design is not enough or the operating mode is more abominable itself, can increase shock-absorbing structure again on the steering shaft to improve and drive the travelling comfort. The common shock absorbing structure of the isolator, the shock absorbing structure of the telescopic shaft and the like. The common damping structure is restricted by the space size or the process of a matching part, the damping function of the damping structure is weaker or only the damping can be carried out on a certain direction, so that the damping function of the steering shaft needs to be enhanced for the pickup, cross-country or SUV type vehicle models with severe working conditions.

Disclosure of Invention

In view of this, the present invention provides a damping coupling for a steering shaft, which aims to solve the problem of the prior art that the vibration of a chassis is too great when transmitted to a steering wheel.

The invention also provides a steering system comprising the damping coupling, so as to solve the problem of poor damping function of the conventional steering system.

Meanwhile, the invention also provides a vehicle comprising the damping coupling, so as to solve the problem of poor driving comfort of the existing vehicle.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

a damping coupling of a steering shaft comprises a transmission shaft sleeve, an elastic rubber disc and a joint fork which are connected in sequence.

As a further technical scheme of the above scheme, the transmission shaft sleeve further comprises a centering mandrel coaxially arranged with the transmission shaft sleeve; the elastic rubber disc and the joint fork are respectively provided with a through hole for the centering mandrel to freely pass through; one end of the centering mandrel is connected with the transmission shaft sleeve, and the other end of the centering mandrel freely extends into the through holes of the elastic rubber disc and the joint fork.

As a further technical scheme of the above scheme, the damping coupler further comprises a connecting plate and a connecting bracket; the connecting plate is connected to the end part, close to the joint fork, of the transmission shaft sleeve; the two connecting supports are respectively arranged at two sides of the elastic rubber disc, wherein the connecting support close to one side of the joint fork is connected with the connecting plate through one group of connecting pieces penetrating through the elastic rubber disc, and the connecting support close to one side of the connecting plate is connected with the joint fork through the other group of connecting pieces penetrating through the elastic rubber disc; and supporting sleeves are sleeved on the connecting pieces between the elastic rubber disc and the connecting plate and between the elastic rubber disc and the joint fork.

As a further technical scheme of the above scheme, a connecting piece connected with the connecting plate simultaneously penetrates through a connecting bracket close to one side of the connecting plate; and the connecting piece connected with the joint yoke simultaneously penetrates through the connecting bracket close to one side of the joint yoke.

As a further technical solution of the above scheme, a structure of the connecting bracket through which the connecting member passes is a through hole or a groove, and the through hole or the groove is in accordance with the cross-sectional shape of the connecting member.

As a further technical scheme of the scheme, the anti-collision sleeve is sleeved on the supporting sleeve.

As a further technical scheme of the above scheme, the transmission shaft sleeve further comprises a centering mandrel coaxially arranged with the transmission shaft sleeve; through holes for the centering mandrel to freely pass through are formed in the elastic rubber disc, the connecting support and the section fork; one end of the centering mandrel is connected with the connecting plate, and the other end of the centering mandrel freely extends into the through holes of the elastic rubber disc, the support and the joint fork.

As a further technical scheme of the scheme, a centering sleeve is arranged between the centering mandrel and the through hole of the yoke.

A steering system comprises the damping coupling.

A vehicle comprises the damping coupling.

In summary, compared with the prior art, the invention has the following advantages and beneficial effects: the vibration in all directions transmitted from the chassis can be absorbed to a certain degree through the buffer and deformation rebound of the elastic rubber plate, so that the riding feeling is more comfortable.

Drawings

Fig. 1 is a schematic view of the overall structure of the damping coupling according to the present invention.

Fig. 2 is an enlarged schematic view of region a in fig. 1, and in fig. 2 the plastic sleeve and the support sleeve are partially cut away.

Fig. 3 mainly shows a schematic structural view between the connecting bracket and the connecting piece in the damping coupling.

Fig. 4 mainly shows a schematic view of a connection structure of the centering mandrel and other parts.

The explanation of each reference number in the figure is: the elastic rubber plate comprises an elastic rubber plate 1, a connecting support 2, a connecting plate 3, a bolt 4, a transmission shaft sleeve 5, a nut 6, a joint fork 7, a centering sleeve 8, a centering mandrel 9, an anti-collision sleeve 10, a supporting sleeve 11 and a groove 211.

Detailed Description

In order that those skilled in the art will better understand the technical solutions of the present invention, the present invention will be further described in detail with reference to the following embodiments.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. The terms first, second and the like, if any, are used for distinguishing technical features only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

The steering shaft is a transmission member for connecting the steering wheel and the steering gear, the steering column tube is fixed on the vehicle body, and the steering shaft passes through the steering column tube and is supported on a bearing and a bush in the column tube.

The first embodiment is as follows:

a first object of the present invention is to provide a damping coupling for a steering shaft, which is mounted at a home position in place of a portion of an original steering shaft, and which can absorb vibrations in various directions transmitted from a chassis to some extent, thereby making a ride more comfortable. The damping coupler comprises a transmission shaft sleeve 5, an elastic rubber disc 1 and a joint fork 7 which are connected in sequence. The drive shaft sleeve 5 is the original steering shaft and is used for driving torque and transmitting vibration. The elastic rubber disc 1 can be connected with the transmission shaft sleeve 5 and the joint fork 7 in a bonding mode, and the elastic rubber disc 1 can absorb vibration through elastic buffering of the elastic rubber disc 1 and resilience after deformation.

In order to prevent the transmission shaft sleeve 5 and the yoke 7 from deflecting mutually and excessively tearing the elastic rubber disc 1, the embodiment of the application further comprises a centering mandrel 9 which is coaxially arranged with the transmission shaft sleeve 5; through holes for the centering mandrel 9 to freely pass through are formed in the elastic rubber disc 1 and the joint fork 7; one end of the centering mandrel 9 is connected with the transmission shaft sleeve 5, and the other end of the centering mandrel freely extends into the through holes of the elastic rubber disc 1 and the joint fork 7. The centering mandrel 9 is helpful for keeping the coaxiality of the transmission shaft sleeve 5 and the joint fork 7, and further the elastic rubber disc 1 is ensured to have a better operation posture.

Example two:

the vibration-damping coupling of the first embodiment has a structure that although vibration can be absorbed to some extent, the elastic rubber plate 1 is limited in deformation, and thus has a limited ability to absorb strong vibration. In order to fully deform the elastic rubber disc 1, the second embodiment improves the connection mode of the elastic rubber disc 1 between the transmission shaft sleeve 5 and the yoke 7 on the basis of the first embodiment, and further comprises a connecting plate 3 and a connecting bracket 2. The connecting plate 3 is welded to the end of the driveshaft tube 5. Two connecting supports 2 are respectively arranged on two sides of the elastic rubber disc 1, wherein the connecting support 2 (for convenience of description, referred to as a first connecting support) near one side of the connecting plate 3 is connected with the joint fork 7 through a group of connecting pieces (for convenience of description, referred to as a first connecting piece) penetrating through the elastic rubber disc 1, the connecting support 2 (for convenience of description, referred to as a second connecting support) near one side of the joint fork 7 is connected with the connecting plate 3 through another group of connecting pieces (for convenience of description, referred to as a second connecting piece) penetrating through the elastic rubber disc 1, and the first connecting support and the second connecting support are arranged in a staggered manner so that the connecting pieces can pass through, for example, the first connecting support and the second connecting support can be two strip-shaped plates arranged perpendicularly to each other. The main function of the first connecting bracket and the second connecting bracket is to clamp the elastic rubber disc 1 and simultaneously connect the elastic rubber disc 1 with the connecting plate 3 and the joint fork 7 to form a damping structure. At this time, the elastic rubber plate 1 can not only deform in the force-receiving direction but also deform torsionally, thereby absorbing the vibration in various directions transmitted from the chassis.

Because the vibration of the steering shaft is mainly transmitted along the axial direction of the steering shaft, the first connecting support and the second connecting support have the tendency of moving away from each other, and the elastic rubber disc 1 cannot be clamped continuously, therefore, the second connecting piece of the connecting piece between the elastic rubber disc 1 and the connecting plate 3 and the first connecting piece between the elastic rubber disc 1 and the joint fork 7 are sleeved with the supporting sleeve 11. Support sleeve 11 can effectively prop first linking bridge and second linking bridge's position through elastic rubber dish 1, when the transmission vibration, the first linking bridge and the second linking bridge that move from each other move in opposite directions under support sleeve 11's reaction force, support sleeve 11 and linking bridge 2 combined action extrusion elastic rubber dish 1, consequently, the vibration is absorbed by elastic rubber dish 1, the vibration reduces by a wide margin when transmitting festival fork 7, and then has reduced the vibration that transmits the steering wheel.

The larger the contact area between the connecting support 2 and the elastic rubber disc 1 is, the better the buffering effect provided by the elastic rubber disc 1 is, therefore, only a through hole or a groove for the connecting piece to pass is formed in the connecting support 2, so as to ensure the contact with the elastic rubber disc 1 to the maximum extent, specifically, the connecting support 2 (first connecting support) on one side of the connecting plate 3 is passed through by the connecting piece (second connecting piece) connected with the connecting plate 3, and the connecting support 2 (second connecting support) on one side of the joint fork 7 is passed through by the connecting piece (first connecting piece) connected with the joint fork 7. The shape of the through-hole or groove should conform to the cross-sectional shape of the connector to reduce the loss of contact area of the connecting bracket 2. The through holes or the grooves can also ensure that when the elastic rubber disc 1 deforms too much to cause uncomfortable feelings such as viscous steering, slow reset and the like, the excessive deflection of the connecting piece is limited, so that the connecting piece can always keep a vertical relation with the elastic rubber disc 1, and the damping efficiency is improved.

The support sleeve 11 is further sleeved with an anti-collision sleeve 10 to prevent the connecting piece from generating collision noise when touching the connecting support 2, and a certain buffering effect can be achieved.

In the second embodiment, when the elastic rubber disc 1 is fixed with the connecting plate 3 or the joint fork 7 through the connecting piece, because the number of intermediate assembly links is large, in order to avoid the rotation deflection of the coaxiality difference, the centering mandrel 9 is also arranged between the connecting plate 3 and the joint fork 7. The centering mandrel 9 and the transmission shaft sleeve 5 are coaxially arranged, a through hole for the centering mandrel 9 to freely pass through is formed in the joint fork 7, one end of the centering mandrel 9 is welded with the connecting plate 3, and the other end of the centering mandrel freely extends into the through hole of the joint fork 7. The centering mandrel 9 enhances the centering effect of the whole damping coupler, so that the whole structure is not easy to deflect, and the vibration transmission is more regular and direct.

In the above embodiment, a centering sleeve 8 is provided between the centering mandrel 9 and the through hole of the yoke 7. Keep apart centering dabber 9 and festival fork 7 through centering cover 8, centering cover 8 is elastic component, with centering dabber 9 interference fit, has certain just effect of leading to festival fork 7 and connecting plate 3, also can avoid the striking contact to produce the noise, still can absorb some vibrations simultaneously.

The elastic rubber disc 1 is a flexible part and is formed by mixing and injection molding of rubber and a wire curtain, and the hardness and rigidity in the circumferential direction/axial direction are designed to generate a certain amount of deformation under a certain force condition, so that the vibration in all directions transmitted from the chassis is absorbed, and the purposes of absorbing vibration and absorbing shock are achieved. The shape of the elastic rubber disc 1 can be selected from a rotary body or a square. The main dimensions of the steering gear are related to the required torsional strength of the steering system, and the larger the torsional strength is, the larger the connecting plate 3, the bolt 4, the transmission shaft sleeve 5 and the joint yoke 7 are, the larger the thickness is, or the higher the mechanical strength of the parts per se is.

In the embodiment of the application, the selectable forms of the connecting pieces are many, as long as the connecting pieces can play a role in fixed connection, the connecting form of the bolt 4 matched with the nut 6 is preferred in the embodiment of the application, the structure is simple, and the connection is stable.

A series of devices used to change or maintain the direction of travel or reverse of a vehicle are known as vehicle steering systems (steering systems). The function of a vehicle steering system is to control the direction of travel of the vehicle at the will of the driver. Vehicle steering systems are critical to the safety of the vehicle during travel, and therefore, the components of the vehicle steering system are all referred to as safeties. During the running process of the vehicle, the running direction of the vehicle needs to be changed frequently according to the intention of a driver, namely the vehicle steering. In the case of wheeled vehicles, steering of the vehicle is achieved by the driver by means of a set of dedicated mechanisms which deflect the wheels (steering wheels) of the steered axle (typically the front axle) of the vehicle at an angle relative to the longitudinal axis of the vehicle. When a vehicle runs straight, the steering wheel is also affected by the lateral interference force of the road surface, and the steering wheel automatically deflects to change the running direction. In this case, the driver can also turn the steered wheels in the opposite direction by using the mechanism, thereby returning the vehicle to the original traveling direction. This set of dedicated mechanisms for changing or restoring the direction of travel of the vehicle is known as the vehicle steering system (commonly referred to as the vehicle steering system). Therefore, the function of the vehicle steering system is to ensure that the vehicle can be steered as intended by the driver. A second object of the present invention is to provide a steering system including the above-mentioned damper coupling. After the steering system is assembled with the damping coupling, the damping performance of the existing steering system can be improved.

A third object of the present invention is to provide a vehicle comprising the seismic coupling described above, so as to improve the ride comfort of the vehicle.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above preferred embodiments should not be considered as limiting the invention, which is subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and these modifications and adaptations should be considered within the scope of the invention.