阅读说明：本技术 集成减振机构的盘毂以及轴件 (Hub and shaft part of integrated damping mechanism ) 是由 段茂林 王杰 于 2020-06-18 设计创作，主要内容包括：本发明涉及一种集成减振机构的盘毂以及轴件。盘毂(1)在径向内侧构造有用于与轴件(2)抗旋转连接的内连接结构(11),减振机构(3)包括容纳部(12)、滑动件(33)和弹性件(32),容纳部具有贯通盘毂的内周表面的开口,其中,开口沿周向相对内连接结构偏离地布置,滑动件布置在容纳部中并且能够部分地伸出开口,弹性件布置在容纳部中并且能够向滑动件施加作用力,以使得滑动件部分地伸出开口,从而滑动件能够与轴件的凹部(22)配合。轴件在径向外侧构造有用于与上述盘毂抗旋转连接的外连接结构(21),其中,在轴件的外周表面中构造凹部(22),其中,凹部沿周向相对外连接结构偏离地布置,其中,凹部的内表面匹配滑动件的滑动接触面。(The invention relates to a disk hub and a shaft part of an integrated damping mechanism. The hub (1) is configured radially on the inside with an inner connection (11) for rotationally fixed connection to the shaft (2), the damping mechanism (3) comprising a receptacle (12) having an opening through the inner circumferential surface of the hub, wherein the opening is arranged offset in the circumferential direction with respect to the inner connection, a slider (33) arranged in the receptacle and able to partially protrude through the opening, and an elastic element (32) arranged in the receptacle and able to exert a force on the slider such that the slider partially protrudes through the opening, so that the slider can engage with the recess (22) of the shaft. The shaft part is designed with an outer connection (21) on the radial outside for rotationally fixed connection to the hub, wherein a recess (22) is designed in the outer circumferential surface of the shaft part, wherein the recess is arranged offset in the circumferential direction with respect to the outer connection, wherein the inner surface of the recess matches the sliding contact surface of the sliding part.)

1. -a hub (1), the hub (1) being configured, radially on the inside, with an inner connection structure (11) for the anti-rotation connection with a shaft element (2), characterized in that it integrates a damping mechanism (3), the damping mechanism (3) comprising:

-a housing (12) having an opening through an inner circumferential surface of the hub (1), wherein the opening is arranged circumferentially offset with respect to the inner connection structure (11);

-a slide (33) arranged in the housing (12) and able to partially protrude out of the opening;

-an elastic member (32) arranged in the housing (12) and capable of exerting a force on the slider (33) to cause the slider (33) to partially protrude out of the opening, so that the slider (33) is capable of cooperating with the recess (22) on the shaft (2).

2. A hub according to claim 1, wherein the inner connection structure (11) is configured as an axial groove.

3. A hub according to claim 1, wherein the receptacle is formed by a hole (12) configured in the hub (1).

4. A hub according to claim 1, wherein the sliding contact surface of the slider (33) with the recess of the shaft (2) comprises a cambered, conical surface.

5. A hub according to claim 1, wherein the damping mechanism (3) comprises a slide stop.

6. A hub according to claim 5, wherein the receptacle (12) has a constricted configuration in the region of the opening.

7. A hub according to claim 1, wherein the damping mechanism (3) comprises a stop for the resilient member (32).

8. A hub according to claim 7, wherein the receptacle (12) is through-hole shaped, the stop being formed by a separate stop member, wherein the stop member is fixed at another opening of the receptacle (12) opposite the opening.

9. A hub according to claim 1, wherein the damping mechanism (3) comprises a guide for the resilient member (32).

10. Shaft (2), characterized in that the shaft (2) is configured radially on the outside with an outer connection (21) for a rotationally fixed connection to a hub (1) according to one of claims 1 to 9, wherein a recess (22) is configured in the outer circumferential surface of the shaft (2), wherein the recess (22) is arranged offset in the circumferential direction with respect to the outer connection (21), wherein the surface of the recess (22) can be adapted to the sliding contact surface of the sliding element (33).

Technical Field

The invention relates to the field of transmission. The invention relates in particular to a hub and a shaft.

Background

In a motor vehicle driven by an engine, a vibration damping device such as a dual mass flywheel is often disposed between the engine and a transmission to effectively isolate torsional vibration of a crankshaft of the engine, which is beneficial to improving the usability of the motor vehicle. The output disk of the dual mass flywheel is connected in a rotationally fixed manner by a spline to the input shaft of the transmission. However, in such a spline coupling, there is a gap, particularly in the circumferential direction, between the inner spline of the output disc and the outer spline of the input shaft. Therefore, when the motor vehicle is idling or in other low-speed driving states, the internal splines of the output disc and the external splines of the input shaft collide with each other, thereby causing noise. It is therefore necessary to take measures to suppress the generation of noise.

For this purpose, chinese patent document CN 103221705B discloses a clamping device for a shaft-hub connection, in which a toothed ring is provided for clamping a shaft and a hub, the base body of which comprises radially outer teeth and radially inner fixing tongues which are formed in the manner of a leaf spring, wherein the free ends of the fixing tongues which are formed in the manner of a leaf spring are fixed to the shaft and the teeth of the toothed ring engage in the teeth of the hub, wherein in the assembled state a clamping force is generated at the shaft-hub connection by a rotation of the toothed ring against the action of force of the fixing tongues, which clamping force is introduced into the shaft-hub connection via the teeth and the fixing tongues.

In the above-described noise-reducing solution, however, the manufacture and assembly of the toothed ring are relatively complicated and the requirement for a toothed ring receiving space is relatively large.

Disclosure of Invention

The object of the invention is therefore to provide an alternative solution to the noise reduction at the splined connection of the shaft and the hub.

According to the invention, the above-mentioned technical problem is solved by a hub and a shaft integrated with a damping mechanism.

The disk hub according to the invention is designed with an inner connecting structure on the radial inner side for rotationally fixed connection to a shaft part, wherein the disk hub is integrated with a damping mechanism. Here, the vibration damping mechanism includes: a receiving portion having an opening penetrating an inner circumferential surface of the hub, wherein the opening is arranged offset from the inner connecting structure in a circumferential direction; the slider is arranged in the accommodating portion and can partially protrude out of the opening; the elastic member is disposed in the accommodating portion and is capable of applying a force to the slider so that the slider partially protrudes out of the opening.

The shaft element according to the invention is designed with an outer connection for rotationally fixed connection to the hub, wherein a recess is formed in an outer circumferential surface of the shaft element, wherein the recess is arranged offset in the circumferential direction with respect to the outer connection, wherein a surface of the recess matches a sliding contact surface of the sliding element.

In the context of this document, the hub has an axial bore for receiving a shaft element, which shaft element can at least partially protrude into the axial bore and is connected in a rotationally fixed manner to the hub. The axial bore is preferably the central bore of the hub. The axial bore can be a blind bore or a through bore.

In this case, the shaft element is arranged coaxially with the axial bore of the hub. Within the scope of this document, the terms "axial", "radial" and "circumferential" are based on a common line of the shaft and the axial bore of the hub, unless otherwise specified.

In order to achieve a rotationally fixed connection of the hub and the shaft element, an inner connection structure is formed radially inside the axial bore of the hub and an outer connection structure is formed radially outside the shaft element. In this case, the inner and outer connection structures can preferably be connected in a rotationally fixed manner by their form fit. For example, the hub and the shaft member implement a spline coupling. Alternatively, the inner and outer connection structures may be connected in a rotationally fixed manner by further components. For example, the hub and the shaft are keyed by another member such as a flat key or a half-round key.

Here, the inner connecting structure is preferably configured as an axial groove. The axial grooves are understood to be the spline grooves of the internal splines, in which case the external connection of the shaft part can be designed as the spline teeth of the external splines; the axial grooves may also be understood as keyways for receiving further components such as flat or semi-circular keys, in which case the outer connection of the shaft part may be configured as corresponding keyways.

The circumferential position of the damping means is designed such that the damping means can avoid the inner connection, i.e. is arranged offset in the circumferential direction with respect to the inner connection, for example an axial groove. In this case, the opening of the receptacle, which penetrates the inner circumferential surface of the hub, is formed in a region outside the inner connection, for example, the axial groove. Accordingly, the recess of the shaft is configured in the region outside the external connection, for example the external spline teeth or the key grooves. The above-mentioned opening of the receptacle opens out towards the shaft part and aligns the recess of the shaft part upon complete assembly, in particular without the inner connecting structure of the hub colliding at least in the circumferential direction with the outer connecting structure of the shaft part or with further components.

The receptacle is preferably in the form of a bore, which may be configured as a through-hole or a blind hole. The receptacle extends at least partially in the radial direction, whereby the elastic element received in the receptacle can be pretensioned at least partially in the radial direction. The sliding element can thereby partially protrude through the opening of the receptacle and rest in the recess of the shaft element under the action of the pretensioned spring element. Particularly preferably, the receptacle extends in the radial direction, wherein the elastic element is pretensioned in the radial direction. The spring element can be designed, for example, as a spring, in particular as a helical compression spring. Alternatively, the spring can also be constructed as a component made of an elastic material.

In this case, the receptacle is preferably formed by a bore formed in the hub. In other words, the sliding element and the spring element can be arranged directly in the bore of the hub, whereby the receptacle can be realized in a simple manner.

Alternatively, the receptacle is formed by a separate component, which can be mounted, for example, in a bore of the hub. The separate component is, for example, a sleeve-shaped component in which the sliding element and the spring element can be accommodated. In this case, the damping mechanism can be fitted in the hub as a single unit in a simple manner, for example by screwing or interference fitting.

The sliding element is configured at least at one end on the radial inside with a preferably smooth sliding contact surface suitable for sliding. Preferably, the sliding contact surface of the sliding member includes a spherical surface, an aspherical surface, a curved surface, or a tapered surface, and further, the sliding contact surface can be provided as a combination of a curved surface, a tapered surface, or a combination of at least one of a curved surface and a tapered surface with a flat surface. Particularly preferably, the sliding element is designed as a sphere or as a cylinder, so that the sliding element can be realized particularly simply. In the assembled state, if the torque transmitted by the hub and the shaft element is small, the sliding element partially protrudes out of the opening of the receptacle, the sliding element resting with a sliding contact surface in a recess of the shaft element, which recess is matched in shape; if the torque transmitted by the hub and the shaft element is large, the sliding element slides back and/or rolls back into the receptacle with the sliding contact surface against the force of the spring element.

In a preferred embodiment, the damping mechanism comprises a slide stop. Therefore, the sliding piece can be prevented from falling off from the accommodating part, and the installation and the transportation of the vibration damping mechanism or the disk hub are facilitated.

In this case, the receptacle advantageously has a constriction in the region of the opening. In this case, the constriction is, for example, of the shape of a truncated cone, the opening of the receptacle being formed at the small end face of the truncated cone. In this case, the slider can partially project from its small end face side, and the other part of the slider is stopped in the receptacle.

In this case, a further slide stop member is alternatively provided in the region of the opening. The slider stop member has, for example, a central hole and can be mounted at the opening of the receptacle such that the slider can only partially protrude through the central hole, the other part of the slider being stopped in the receptacle at this time.

In a preferred embodiment, the damping mechanism comprises a stop for the spring, so that the spring can advantageously be tensioned in the receptacle.

In this case, in the embodiment in which the receptacle is in the form of a through-hole, the stop for the spring is advantageously formed by a separate stop element, wherein the separate stop element is fastened to a further opening of the receptacle opposite the opening, i.e. the radially outer opening. For example, the stop member is fixed at the radially outer opening by a thread or interference fit.

In this case, in the embodiment in which the receptacle is blind, the stop for the spring is advantageously formed by the bottom of the blind hole.

In a preferred embodiment, the damping mechanism further comprises a guide for the spring, so that buckling of the spring, in particular of the spring, can be prevented. For example, the guide can be formed at the stop element for the spring or at the slide.

In one possible embodiment, at least two damping means are provided in the hub. Correspondingly, at least two recesses are provided on the outer circumferential surface of the shaft, which recesses match the sliding contact surfaces of the sliding parts. Advantageously, at least two damping means are distributed circumferentially in the hub. Whereby the effect of reducing noise can be enhanced.

In the free state where the recess is fitted to the damper device, the inner connection structure of the hub and the outer connection structure of the shaft may be spaced from each other or may be in close contact with each other.

Noise can be effectively reduced by the hub and the shaft member of the integrated vibration reduction mechanism provided according to the embodiment of the invention. In particular, at low speeds, the torque transmitted between the hub and the shaft is low, and the elastic member pushes the slider against the recess of the shaft with its stored energy, thereby preventing the hub from rotating relative to the shaft, so that the inner connection structure can be maintained without colliding with the outer connection structure of the shaft or another member at all times, thereby effectively preventing noise from being generated. At high rotational speeds, the torque transmitted between the hub and the shaft is high, the elastic member provides insufficient elastic force to resist the radial component of the force applied by the recess of the shaft to the slider, and the slider slides out of and/or rolls out of the recess of the shaft and retracts into the receptacle, thereby allowing the hub to rotate slightly relative to the shaft.

For example, the hub can be designed as an output disk, i.e. as a secondary flywheel, for a dual-mass flywheel of a motor vehicle, and the shaft element can be designed as an input shaft for a transmission of the motor vehicle. With the solution according to an embodiment of the present invention, especially during engine idling, the collision of the internal splines of the output disc of the dual mass flywheel against the external splines of the transmission input shaft can be effectively reduced, thereby reducing noise; while the motor vehicle is driven by the engine, the internal splines of the output disc of the dual mass flywheel and the external splines of the transmission input shaft transmit torque in a conventional manner to introduce the power of the engine into the transmission.

Drawings

A preferred embodiment of the invention is schematically illustrated in the following with reference to the accompanying drawings. The attached drawings are as follows:

fig. 1 shows a schematic sectional view of a hub and a shaft part at a damping mechanism, cut radially, according to a preferred embodiment;

fig. 2 shows a schematic sectional illustration of the hub and the shaft element according to fig. 1, taken along the axial direction at the damping mechanism;

fig. 3 shows a schematic illustration of the damping mechanism according to fig. 1 in a first operating state; and

fig. 4 shows a schematic illustration of the vibration damping mechanism according to fig. 1 in a second operating state.

Detailed Description

Fig. 1 and 2 each show a schematic sectional view of a hub 1 and a shaft element 2 in a radial section and in an axial section at a damping mechanism, respectively, according to a preferred embodiment. The hub 1 is only schematically represented here by a sleeve-like illustration, and the hub 1 can be, for example, an output disk for a dual-mass flywheel of a motor vehicle. The shaft element 2 can be, for example, an input shaft for a transmission of a motor vehicle, wherein the shaft element 2 only shows the region which is assigned to the hub 1.

As shown in fig. 1 in particular, an inner connection structure in the form of internally splined spline grooves 11 is formed radially inside the axial bore of the disk hub 1, and an outer connection structure in the form of externally splined spline teeth 21 is formed radially outside the shaft element 2. The spline grooves 11 of the disk hub 1 and the spline teeth 21 of the shaft element 2 form a spline coupling in a mutually fitting manner, whereby torque can be transmitted.

The damping means 3 is arranged offset in the circumferential direction with respect to the spline grooves 11 of the hub 1 and the spline teeth 21 of the shaft 2. The damper mechanism 3 includes the housing 12, the slider 33, and the elastic member 32.

As fig. 1 and 2 show, the receptacle 12 is formed by a through-opening formed in the hub 1. Here, the through hole constituting the housing portion 12 penetrates the outer circumferential surface and the inner circumferential surface of the hub 1 in the radial direction. In this case, the accommodating portion 12 forms an opening on the radially inner side and an opening on the radially outer side. The radially outer opening of the accommodating portion 12 is closed by a bolt 31. Here, the male screw of the bolt 31 is screwed with the female screw at the inner wall of the through-hole to fix the bolt 31. The receptacle 12 tapers conically on the radial inside, so that the opening area of the opening on the radial inside is smaller relative to the cross-sectional area of the receptacle space in the other regions of the receptacle 12. The radially inner reduced opening and the recess 22 formed on the shaft element 2 are aligned with one another.

The sliding element 33 is designed here as a sphere and is arranged in the radially inner region of the receptacle 12. Accordingly, the inner surface of the recess 22 of the shaft element 2 is configured to match the circular arc surface of the ball 33. The sliding element, i.e. the ball 33, is dimensioned such that the ball 33 can partially protrude through the opening radially inside the receptacle 12, but cannot fall out of the opening.

The spring element 32 is designed here as a helical compression spring, which is likewise arranged in the receptacle 12. Here, the helical compression spring 32 bears with its one longitudinal end against the ball 33 and with its other longitudinal end against the bolt 31. Here, the bolt 31 constitutes a stopper of the helical compression spring 32. The ball 33 can thereby partially protrude through the radially inner opening of the receptacle 12 under the influence of the pre-stressed helical compression spring 32.

Fig. 3 and 4 show a schematic representation of the damping mechanism according to fig. 1 in two operating states, respectively. In this case, an embodiment is described in which the hub 1 is designed as an output disk for a dual mass flywheel of a motor vehicle and the shaft element 2 is designed as an input shaft for a transmission of the motor vehicle.

In a first operating state, as shown in fig. 3, the hub 1 and the shaft element 2 rotate at a very low rotational speed, while the engine of the motor vehicle is, for example, in an idling state. In this case, the torque transmitted between the hub 1 and the shaft member 2 is low, and at this time, the helical compression spring 32 pushes the spherical body 33 with its stored energy to protrude from the through hole 12 in the hub 1 and abut against the concave portion 22 of the shaft member 2, thereby preventing the hub 1 from rotating or wobbling relative to the shaft member 2, so that the spline grooves 11 of the hub 1, particularly the side walls of the spline grooves 11, can be kept from colliding against the spline teeth 21 of the shaft member 2, particularly the side walls of the spline teeth 21, at all times, and thus effectively preventing noise from being generated due to the collision of the spline grooves 11 and the spline teeth 21.

In a second operating state, as shown in fig. 4, the hub 1 and the shaft 2 are rotated at a higher rotational speed, while the motor vehicle is driven by the engine. In this case, the torque transmitted between the hub 1 and the shaft member 2 is high, and at this time, the spring force provided by the helical compression spring 32 is insufficient to resist the component force of the force applied to the spherical body 33 by the concave portion 22 of the shaft member 2, whereby the balls 33 partly slide out and/or roll out of the circular arc shaped inner surface of the recess 22 of the shaft element 2 and partly retract into the through holes 12, thereby allowing a slight rotation of the hub 1 relative to the shaft element 2, during the rotation of the hub 1 relative to the shaft 2, the acting force exerted by the helical compression spring 32 on the balls 33 resists the rotation of the hub 1 relative to the shaft 2, so as to generate a damping effect, reduce or eliminate the impact between the hub 1 and the shaft 2 and the noise caused thereby, and finally enable the side walls of the spline grooves 11 of the hub 1 to abut against the side walls of the spline teeth 21 of the shaft 2, so as to transmit torque in a conventional transmission manner.

Although possible embodiments have been described by way of example in the above description, it should be understood that numerous embodiment variations exist, still by way of combination of all technical features and embodiments that are known and that are obvious to a person skilled in the art. It should also be appreciated that the exemplary embodiment or exemplary embodiments are only examples, and are not intended to limit the scope, applicability, or configuration of the invention in any way. From the foregoing description, one of ordinary skill in the art will more particularly provide a technical guide to convert at least one exemplary embodiment, wherein various changes may be made, particularly in matters of function and structure of the components described, without departing from the scope of the following claims.

List of reference numerals

1 disc hub

11 inner connecting structure, spline groove

12 through hole

2 axle part

21 external connection structure, spline teeth

22 recess

3 vibration damping mechanism

31 stop piece, bolt

32 elastic member, helical compression spring

33 sliding member, sphere