Connecting structure of driving shaft and hub bearing and vehicle

Abstract

The utility model relates to a connecting structure of a driving shaft and a hub bearing and a vehicle, and the connecting structure comprises the driving shaft, the driving shaft is provided with a plurality of first mounting holes, and the first mounting holes extend in the axial direction of the driving shaft and are arranged at intervals in the direction perpendicular to the axial direction; a plurality of second mounting holes are formed in the hub bearing unit, and the first mounting holes and the second mounting holes are in one-to-one correspondence in the axial direction; and each fastener penetrates through the corresponding second mounting hole and extends into the corresponding first mounting hole in the axial direction, so that the driving shaft and the hub bearing unit are connected. The driving shaft and the hub bearing unit are fastened and locked through the fasteners, it is guaranteed that when the driving shaft and the hub bearing unit transmit torque, the driving shaft and the hub bearing unit cannot slide relatively, and therefore the problem that abnormal sound is caused by sliding friction at the contact position of the driving shaft and the hub bearing unit is solved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of vehicles, and particularly relates to a connection structure of a drive shaft and a hub bearing and a vehicle. BACKGROUND

[0002] In the field of vehicles, the connection structure of a drive shaft and a hub bearing is very crucial. The current traditional connection mode has many problems. For example, when the vehicle starts or reverses, the relative sliding between the drive shaft and the hub bearing unit will cause frictional noise. CONTENT OF THE UTILITY MODEL

[0003] In order to overcome the problems in the prior art, the present disclosure provides a connection structure of a drive shaft and a hub bearing and a vehicle.

[0004] In a first aspect of the embodiments of the present disclosure, a connection structure of a drive shaft and a hub bearing is provided, comprising: a drive shaft, which is provided with a plurality of first mounting holes, the plurality of first mounting holes all extend along the axial direction of the drive shaft, and are arranged at intervals in a direction perpendicular to the axial direction; a hub bearing unit, which is provided with a plurality of second mounting holes, the plurality of first mounting holes and the plurality of second mounting holes correspond to each other along the axial direction; and a plurality of fasteners, each of the fasteners extends through the second mounting hole into the first mounting hole arranged in the axial direction to connect the drive shaft and the hub bearing unit.

[0005] Optionally, the number of the first mounting holes, the second mounting holes and the fasteners is at least three respectively.

[0006] Optionally, the three first mounting holes, the three second mounting holes and the three fasteners are arranged at intervals of 120° in the circumferential direction.

[0007] Optionally, the hub bearing unit comprises a hub flange, the hub flange is provided with a recessed plane at the center, and the three second mounting holes are arranged on the recessed plane around the central axis of the drive shaft.

[0008] Optionally, the end of the fastener is located on the side of the hub bearing unit away from the drive shaft, at least part of the first mounting hole is a threaded hole to be screwed with the external thread of the fastener, and the second mounting hole is a smooth hole.

[0009] Optionally, one of the drive shaft and the hub bearing unit is formed with a groove, and the other is formed with a protrusion, and the protrusion and the groove are inserted in interference along the radial direction of the drive shaft.

[0010] Optionally, the number of the groove and the protrusion is a plurality, and they are arranged at intervals in the circumferential direction.

[0011] Optionally, the first mounting hole, the second mounting hole and the fastener are arranged in a circumferential direction staggered with the groove.

[0012] Optionally, the groove is formed in the drive shaft and is configured to extend axially from an end face of the drive shaft close to the hub bearing unit.

[0013] According to a second aspect of the embodiments of the present disclosure, a vehicle is provided, comprising the connection structure of the drive shaft and the hub bearing provided by the present disclosure.

[0014] The technical solutions provided by the embodiments of the present disclosure can have the following beneficial effects: the drive shaft and the hub bearing unit are fastened and locked by the plurality of fasteners, so that the drive shaft and the hub bearing unit do not slide relative to each other when transmitting torque, thereby solving the problem of abnormal noise caused by sliding friction at the contact between the drive shaft and the hub bearing unit.

[0015] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present disclosure and, together with the specification, serve to explain the principles of the present disclosure.

[0017] Figure 1 is a connection schematic diagram of a drive shaft and a hub bearing unit according to an exemplary embodiment.

[0018] Figure 2 is a cross-sectional view along line A in Figure 1 .

[0019] Figure 3 is an axial projection view of a connection of a drive shaft and a hub bearing unit according to an exemplary embodiment.

[0020] Figure 4 is an axial projection view of a drive shaft according to an exemplary embodiment.

[0021] Figure 5 is an axial projection view of a hub bearing unit according to an exemplary embodiment.

[0022] LEGEND OF DRAWINGS

[0023] 10 - drive shaft, 11 - first mounting hole, 20 - hub bearing unit, 201 - hub flange, 2011 - recessed plane, 21 - second mounting hole, 30 - fastener, 31 - end head, 40 - groove, 50 - protrusion. DETAILED DESCRIPTION

[0024] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses consistent with some aspects of this disclosure as detailed in the appended claims.

[0025] In the automotive field, the connection structure between the drive shaft and the wheel hub bearing is crucial. Current traditional connection methods, such as spline connections, have many problems. For example, when the vehicle starts or reverses, slippage can occur at the spline joint, and the relative slippage between the drive shaft and the wheel hub bearing unit can cause frictional noise.

[0026] Therefore, this disclosure provides a connection structure between a drive shaft and a hub bearing, which eliminates the slippage caused by the spline connection. This connection structure includes a drive shaft 10 and a hub bearing unit 20. (Refer to...) Figure 4 The drive shaft 10 has a plurality of first mounting holes 11, which extend along the axial direction of the drive shaft 10 and are spaced apart in a direction perpendicular to the axial direction; see reference Figure 5 The wheel hub bearing unit 20 has multiple second mounting holes 21, and multiple first mounting holes 11 correspond one-to-one with the multiple second mounting holes 21 along the axial direction, so that when the drive shaft 10 and the wheel hub bearing unit 20 are coaxially connected, the first mounting holes 11 and the second mounting holes 21 are also coaxially corresponding. This connection structure also includes multiple fasteners 30, each fastener 30 extending through the second mounting hole 21 into the axially corresponding first mounting hole 11 to connect the drive shaft 10 and the wheel hub bearing unit 20, such as... Figure 2 As shown, fastener 30 along Figure 2 The direction of the drawing extends from left to right through the second mounting hole 21 and into the first mounting hole 11 on the right side. That is, fasteners 30 are provided axially through the first mounting hole 11 and the second mounting hole 21 in each set of axially corresponding locations. By tightening the fasteners 30, the drive shaft 10 and the hub bearing unit 20 are axially fastened together by the fasteners 30.

[0027] By using the above technical solution, the drive shaft 10 and the wheel hub bearing unit 20 are fastened and locked together with multiple fasteners 30 to ensure that when the drive shaft 10 and the wheel hub bearing unit 20 transmit torque, the drive shaft 10 and the wheel hub bearing unit 20 will not slide relative to each other, thereby solving the problem of abnormal noise caused by sliding friction at the contact point between the drive shaft 10 and the wheel hub bearing unit 20.

[0028] In one embodiment, reference is made to... Figures 3 to 5The number of the first mounting holes 11, the second mounting holes 21 and the fasteners 30 can be at least three respectively to ensure the connection strength and avoid relative sliding. For example, the number of the three fastening connection structures arranged in the space perpendicular to the axial direction can ensure the fastening effect of the connection, avoid relative sliding between the drive shaft 10 and the hub bearing unit 20, and also avoid unnecessary waste due to the arrangement of more fastening connections.

[0029] With reference to Figure 2 and Figure 3 The hub bearing unit 20 includes a hub flange 201 to provide a mounting platform. The center of the hub flange 201 is provided with a recessed plane 2011, and three second mounting holes 21 are arranged on the recessed plane 2011 around the central axis of the drive shaft 10, i.e., the axis of each mounting hole is at a distance from the central axis of the drive shaft 10 and the hub bearing unit 20. Compared with the scheme in which the axis of the mounting hole coincides with the central axis, the distance can increase the force arm of the fastening force of the fastener 30, thereby increasing the torque, so that the fastening effect of the fastener 30 is better. Arranging the second mounting holes 21 on the recessed plane 2011 can avoid interference or expansion of the fastener 30 with other structures, thereby protecting the fastener 30.

[0030] Further, the three first mounting holes 11, the three second mounting holes 21 and the three fasteners 30 are respectively arranged at 120° on the circumference. That is, the centers of the three first mounting holes 11 are located on the same circumference and are arranged at equal intervals on the circumference. The centers of the three second mounting holes 21 are located on the same circumference and are arranged at equal intervals on the circumference. The centers of the three fasteners 30 are located on the same circumference and are arranged at equal intervals on the circumference. Through this arrangement, the stress of the fastener 30, the drive shaft 10 and the hub bearing unit 20 is uniform, avoiding connection failure caused by excessive stress on a single point. This uniform distribution can improve the stability and reliability of the connection and ensure more uniform torque transmission between the drive shaft 10 and the hub bearing unit 20.

[0031] With reference to Figure 2The end 31 of the fastener 30 is located on the side of the hub bearing unit 20 facing away from the drive shaft 10. At least a portion of the first mounting hole 11 is a threaded hole, and the second mounting hole 21 is a smooth hole. When the end 31 of the fastener 30 is located on the side of the hub bearing unit 20, the fastener 30 is installed by passing through the hub bearing unit 20 to the drive shaft 10, that is, the fastener 30 first passes through the second mounting hole 21 and then into the first mounting hole 11. In this embodiment, the second mounting hole 21 is set as a smooth hole to facilitate the smooth passage of the fastener 30, and at least a portion of the first mounting hole 11 is set as a threaded hole to be screwed and fastened with the external thread of the fastener 30. The arrangement of this embodiment makes the fastener 30 firmly connected and easy to disassemble.

[0032] In this embodiment of the disclosure, reference is made to Figure 4 and Figure 5 One of the drive shaft 10 and the hub bearing unit 20 may have a groove 40, and the other may have a protrusion 50. The protrusion 50 and the groove 40 are radially interference-fitted together along the drive shaft 10. In this embodiment, the interference fit between the drive shaft 10 and the hub bearing unit 20 via the groove 40 and the protrusion 50, compared to the involute spline method, can enhance the connection strength between the drive shaft 10 and the hub bearing unit 20, improve the torque transmission capability, solve the problem of abnormal noise caused by the gap around the spline, and save costs.

[0033] The number of grooves 40 and protrusions 50 can both be multiple, and they are evenly distributed in the circumferential direction. Multiple evenly distributed grooves 40 and protrusions 50 can distribute torque more evenly, further improving the stability of the connection. For example, the number of grooves 40 and protrusions 50 can both be three, and they are evenly distributed in a 120° arrangement in the circumferential direction.

[0034] In the circumferential direction, the first mounting hole 11, the second mounting hole 21, and the fastener 30 are staggered from the groove 40, that is, referring to Figure 4 and Figure 5 The groove 40 is not in the same radial direction as the center of the first mounting hole 11, the second mounting hole 21, and the fastener. Correspondingly, the protrusion 50 is also not in the same radial direction as the center of the first mounting hole 11, the second mounting hole 21, and the fastener. This arrangement avoids a large radial space being occupied at a certain point, resulting in a small interference fit between the groove 40 and the protrusion 50, or a small mounting hole size leading to insufficient tightening force. It also avoids interference between the fastening installation and interference fit installation of the fastener 30 when the drive shaft 10 is installed with the wheel hub bearing unit 20.

[0035] In an embodiment, the recess 40 can be formed on the drive shaft 10 and configured to extend axially from an end face of the drive shaft 10 close to the hub bearing unit 20, and the protrusion 50 is correspondingly formed on the hub bearing unit 20. By arranging the recess 40 at the end face of the drive shaft 10, the insertion and fitting of the protrusion 50 can be facilitated, and the positioning of the two during the installation process can be facilitated. The recess 40 can be radially inwardly concave from the outer circumference of the drive shaft 10, and the protrusion 50 can be radially outwardly convex from the inner circumference of the hub bearing unit 20, so that after the drive shaft 10 is inserted into the hub bearing unit 20, the protrusion 50 can be inserted into the recess 40 for interference fitting.

[0036] In the embodiments of the present disclosure, the traditional spline connection between the drive shaft and the hub bearing unit is cancelled, and instead, the recess 40 and the protrusion 50 are connected through interference fitting, and a plurality of fasteners 30 are used for fastening connection, so that relative sliding between the end face of the drive shaft 10 and the inner circumference of the hub bearing unit 20 is avoided during torque transmission, thereby solving the problem of abnormal noise caused by sliding friction.

[0037] According to a second aspect of the embodiments of the present disclosure, a vehicle is provided, which comprises the connection structure of the drive shaft and the hub bearing described above, and has all the beneficial effects of the connection structure, which will not be described herein again.

[0038] Furthermore, the word "exemplary" is used herein to mean serving as an example, instance, or illustration. Any implementation described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations. Rather, the word "exemplary" is used herein to present concepts in a concrete manner. As used in this application, the term "or" is intended to mean an inclusive "or" rather than an exclusive "or". That is, unless specified otherwise, or clear from context, "X employs A or B" is intended to mean any of the natural inclusive permutations. That is, if X employs A; X employs B; or X employs both A and B, then "X employs A or B" is satisfied under any of the foregoing instances. In addition, the articles "a" and "an" as used in this application and the appended claims should generally be construed to mean "one or more" unless specified otherwise or clear from context to be directed to a singular form. Thus, use of the articles in this application and the following claims is not limiting.

[0039] Similarly, although this disclosure has been shown and described with respect to one or more implementations, equivalent variations and modifications will occur to those skilled in the art upon reading and understanding this specification and the accompanying drawings. This disclosure includes all such modifications and variations and is limited only by the scope of the claims. In particular, with respect to the various functions performed by the components described above (e.g., elements, resources, etc.), unless otherwise indicated, the terminology used to describe such components is intended to correspond to any component (functionally equivalent) that performs the specific function of the described component, even if structurally not equivalent to the disclosed structure. Furthermore, although specific features of this disclosure may have been disclosed with respect to only one of several implementations, such features may be combined with one or more other features of other implementations, as may be desired and advantageous to any given or particular application. Moreover, with regard to the terms “comprising,” “owning,” “having,” “having,” or variations thereof as used in the detailed description or claims, such terms are intended to be inclusive in a manner similar to the term “including.”

[0040] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

[0041] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

[0042] In the above detailed description, reference has been made to the accompanying drawings, which illustrate specific aspects of this disclosure by way of illustration. In this regard, terms indicating direction or positional relationship, such as “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential,” are used with reference to the orientation of the described figures. Since components of the described device can be positioned in multiple different orientations, directional terms are used for illustrative purposes and not for limitation. It should be understood that other aspects can be utilized and structural or logical changes can be made without departing from the concept of this disclosure. Therefore, the following detailed description should not be considered limiting.

[0043] It should be understood that the features of various ones of the example embodiments of the present disclosure described herein can be combined with each other, unless specifically noted otherwise. As used herein, the term "and / or" includes any one of the referenced items, as well as any combination of any two or more of the referenced items; similarly, "at least one of" includes any one of the referenced items, as well as any combination of any two or more of the referenced items.

[0044] It should be understood that, unless otherwise specifically pointed out and limited, the terms "joined", "attached", "mounted", "connected", "linked", "fixed" and the like employed in the example embodiments of the present disclosure should be given their broadest possible interpretation, such as can be a fixed connection, or a detachable connection, or integral; can be a mechanical connection, or an electrical connection, or communicable with each other; can be a direct connection, or an indirect connection through an intermediate medium, or an internal connection of two elements, or an interaction relationship between two elements, unless otherwise specifically limited. The specific meaning of the above terms in this text can be understood according to the specific circumstances for those skilled in the art.

[0045] Further, the word "over" used in the context of a component, an element, or a layer "over" another component, element, or layer means that the component, element, or layer is positioned "indirectly" on the other component, element, or layer such that at least one additional component, element, or layer is positioned between the component, element, or layer and the other component, element, or layer. However, the word "over" used in the context of a component, an element, or a layer "over" another component, element, or layer can also optionally have the specific meaning of the component, element, or layer being positioned "directly" on the other component, element, or layer, e.g., in direct contact with the other component, element, or layer.

[0046] Although terms such as "first", "second", and "third" can be used herein to describe various elements, components, regions, layers or sections, these elements, components, regions, layers or sections are not limited by these terms. Rather, these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section mentioned in the examples described herein can also be referred to as a second element, component, region, layer or section, without departing from the teachings of the examples. In addition, the terms "first", "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description herein, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically and explicitly limited.

[0047] It should be understood that spatial relative terms, such as “above,” “upper,” “below,” and “lower,” are used herein to describe the relationship between one element and another shown in the figures. In addition to the orientation depicted in the figures, these spatial relative terms are also intended to encompass different orientations of the device in use or operation. For example, if the device in the figures is flipped, an element described as “above” or “upper” relative to another element would be “below” or “lower” relative to that other element. Thus, depending on the spatial orientation of the device, the term “above” encompasses both above and below orientations. Devices may have other orientations (e.g., rotated 90 degrees or in other orientations), and the spatial relative terms used herein should be interpreted accordingly.

Claims

1. A connection structure between a drive shaft and a hub bearing, characterized in that, include: The drive shaft has a plurality of first mounting holes, which extend along the axial direction of the drive shaft and are spaced apart in a direction perpendicular to the axial direction. The hub bearing unit has multiple second mounting holes, and the multiple first mounting holes and the multiple second mounting holes correspond one-to-one along the axial direction. as well as Multiple fasteners, each of which extends through the second mounting hole into a corresponding axially disposed first mounting hole, to connect the drive shaft and the hub bearing unit.

2. The connection structure between the drive shaft and the hub bearing according to claim 1, characterized in that, The number of the first mounting hole, the second mounting hole, and the fastener is at least three.

3. The connection structure between the drive shaft and the hub bearing according to claim 2, characterized in that, The three first mounting holes, the three second mounting holes, and the three fasteners are each evenly distributed in a 120° circle.

4. The connection structure between the drive shaft and the hub bearing according to claim 3, characterized in that, The hub bearing unit includes a hub flange, the hub flange has a recessed plane at its center, and the three second mounting holes are arranged on the recessed plane around the central axis of the drive shaft.

5. The connection structure between the drive shaft and the hub bearing according to claim 1, characterized in that, The end of the fastener is located on the side of the hub bearing unit facing away from the drive shaft. At least a portion of the first mounting hole is a threaded hole for screwing into the external thread of the fastener. The second mounting hole is a smooth hole.

6. The connection structure between the drive shaft and the hub bearing according to any one of claims 1-5, characterized in that, The drive shaft and the hub bearing unit each have a groove and a protrusion, and the protrusion and the groove are interference-fitted together radially along the drive shaft.

7. The connection structure between the drive shaft and the hub bearing according to claim 6, characterized in that, There are multiple grooves and protrusions, and they are evenly distributed in the circumferential direction.

8. The connection structure between the drive shaft and the hub bearing according to claim 6, characterized in that, In the circumferential direction, the first mounting hole, the second mounting hole, and the fastener are arranged offset from the groove.

9. The connection structure between the drive shaft and the hub bearing according to claim 6, characterized in that, The groove is formed on the drive shaft and is configured to extend axially from the end face of the drive shaft near the hub bearing unit.

10. A vehicle, characterized in that, It includes the connection structure between the drive shaft and the hub bearing according to any one of claims 1-9.

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