Hub integrated constant velocity joint

Abstract

A hub integrated type constant velocity joint according to the present disclosure can include a plurality of wheel guide coupling portions configured to be coupled to a plurality of wheel guides, and a hub housing formed between the wheel guide coupling portions, and wherein a discharge portion is formed in a step with each of the wheel guide coupling portions and is configured to discharge foreign matter to the outside.

Description

Technical Field

[0001] This invention relates to a constant velocity joint, and more specifically, to a built-in constant velocity joint having a structure that allows easy discharge of foreign matter and moisture introduced into the constant velocity joint, and is integrally formed from a hub housing and the outer ring of the constant velocity joint. Background Technology

[0002] Typically, the wheel hub and bearings are mounted in the wheel hub connected to the drive axle and are used to bear the loads in the vertical and longitudinal directions of the vehicle, as well as the horizontal loads when the vehicle is cornering. Additionally, a constant velocity joint is mounted in the vehicle's drive axle and is used to transmit power from the transmission to the wheels. Furthermore, the constant velocity joint, wheel hub, and bearings are usually organically assembled together as a single unit via joining components.

[0003] Meanwhile, the constant velocity joint is installed in the vehicle's wheel via wheel guides. When foreign objects and moisture are introduced into the constant velocity joint through the wheel guides, malfunctions may occur. Therefore, there is a need to develop a technology that can easily remove foreign objects and moisture introduced into the constant velocity joint to the outside.

[0004] The information included in the background section of this invention is only intended to enhance the understanding of the general background of the invention and should not be construed as corresponding to prior art known to those skilled in the art or any form of implication. Summary of the Invention

[0005] Various aspects of the present invention aim to provide a built-in constant velocity joint having a structure that allows easy discharge of foreign matter and moisture introduced into the hub-in constant velocity joint, and is integrally formed from a hub housing and an outer ring of the constant velocity joint.

[0006] According to one aspect, a hub-integrated constant velocity joint is provided, the hub-integrated constant velocity joint comprising: a plurality of wheel guide coupling portions, wheel guides configured to be coupled to the plurality of wheel guide coupling portions; and a hub housing formed between the wheel guide coupling portions, wherein a discharge portion forms a step with each of the wheel guide coupling portions and is configured to discharge foreign matter to the outside.

[0007] The wheel guide connecting portion can be formed along the inner periphery of the open surface of the wheel hub housing, and the discharge portion can be formed between the wheel guide connecting portions along the inner periphery of the open surface of the wheel hub housing to form a step with the multiple wheel guide connecting portions.

[0008] The hub housing may further include a flange mounted in the brake disc, and the discharge portion may form a step between the wheel guide couplings and be recessed from the inner circumferential side of the open surface of the hub housing toward the edge of the flange.

[0009] The number of wheel guide connecting parts can be equal to the number of discharge parts.

[0010] Stops that limit the depth to which wheel guides are pressed in can be formed in multiple wheel guide connections.

[0011] The wheel guide may include: a wheel mounting portion configured to guide the center ring of the wheel when the wheel is mounted; a disc mounting portion configured to guide the center ring of the brake disc when the brake disc is mounted; and a connecting portion connected to a plurality of wheel guide connecting portions.

[0012] The wheel mounting section and the disc mounting section can form a stepped structure with each other.

[0013] Wheel guides can be manufactured by forging or stamping.

[0014] Other features and advantages of the methods and apparatus of the present invention are apparent from the accompanying drawings and the following detailed description, which are incorporated herein by reference, or are set forth in detail in the accompanying drawings and the following detailed description, wherein the drawings, together with the following detailed description, serve to explain certain principles of the invention. Attached Figure Description

[0015] Figure 1 This is a diagram illustrating an integral constant velocity universal joint for a wheel hub according to various exemplary embodiments of the present invention;

[0016] Figure 2 It is along Figure 1 A cross-sectional view taken from line AA;

[0017] Figure 3 This is a diagram illustrating a wheel guide connected to a hub-integrated constant velocity joint according to various exemplary embodiments of the present invention;

[0018] Figure 4 This is a diagram illustrating, according to various exemplary embodiments of the present invention, the discharge of foreign matter and moisture inside the hub-integrated constant velocity joint to the outside when the wheel guide is connected to the hub-integrated constant velocity joint.

[0019] Figure 5 This is a diagram illustrating, according to various exemplary embodiments of the present invention, the situation where moisture inside the hub-integrated constant velocity joint is discharged to the outside when the wheel guide is connected to the hub-integrated constant velocity joint; and

[0020] Figure 6This is an exemplary cross-sectional view of a conventional constant velocity universal joint without a discharge section.

[0021] The methods and apparatus of the present invention have other features and advantages that are obvious from the accompanying drawings incorporated herein and the following detailed description or that are set forth in detail in the accompanying drawings and the following detailed description, wherein the accompanying drawings, together with the following detailed description, serve to explain certain principles of the invention. Detailed Implementation

[0022] Referring now to various embodiments of the invention, examples of which are illustrated in the accompanying drawings and described below. Although the invention will be described in conjunction with exemplary embodiments thereof, it will be understood that this description is not intended to limit the invention to those exemplary embodiments. Rather, the invention is intended to cover not only the exemplary embodiments thereof, but also various alternatives, modifications, equivalents and other embodiments that may be included within the spirit and scope of the invention as defined by the appended claims.

[0023] In the following description, an integral constant velocity universal joint according to an exemplary embodiment of the present invention will be described with reference to the accompanying drawings.

[0024] Figure 1 This is a diagram illustrating a built-in constant velocity universal joint according to various exemplary embodiments of the present invention. Figure 2 It is along Figure 1 A cross-sectional view taken from line AA. Figure 3 This is a diagram illustrating a wheel guide connected to a hub-integrated constant velocity joint according to various exemplary embodiments of the present invention. Figure 4 This diagram illustrates, according to various exemplary embodiments of the present invention, the situation where foreign matter and moisture inside the hub-integrated constant velocity joint are discharged to the outside when the wheel guide is connected to the hub-integrated constant velocity joint. Figure 5 This is a diagram illustrating, according to various exemplary embodiments of the present invention, the situation where water inside the hub-integrated constant velocity joint is discharged to the outside when the wheel guide is connected to the hub-integrated constant velocity joint. Figure 6 This is an example of a cross-sectional view of a conventional constant velocity universal joint without a discharge section.

[0025] Reference Figure 1 and Figure 2According to various exemplary embodiments of the present invention, the hub-integrated constant velocity universal joint may include: a plurality of wheel guide connecting portions 110, to which wheel guides 200 are connected; and a hub housing 100 formed between the wheel guide connecting portions 110 to form a step with each of the wheel guide connecting portions 110, and having a discharge portion 120 formed in the hub housing 100 to allow foreign matter in the hub housing 100 to be discharged to the outside.

[0026] Additionally, the hub housing 100 may further include a flange 130 mounted on the brake disc. In this case, the flange 130 may be a surface mounted on the brake disc and may be formed as a mounting surface parallel to the wheel.

[0027] The hub housing 100 has a shape that integrally forms the wheel hub and the outer ring of a constant velocity joint. The constant velocity joint can be connected to the inside of the hub housing 100 to transmit the drive torque from the engine to the wheel. At the same time, the hub housing 100 can also serve as the inner ring of the wheel bearing to support the vehicle's load.

[0028] As described above, the wheel hub housing 100 is formed integrally with the outer ring of the constant velocity joint, allowing the center of the constant velocity joint to move to the outside of the vehicle. Therefore, the length of the drive shaft can be increased, thereby improving the universal joint angle of the drive shaft of the constant velocity joint.

[0029] Furthermore, since the hub housing 100 is formed integrally with the outer ring of the constant velocity joint, the weight and manufacturing cost can be reduced by omitting the conventional connecting components between the wheel hub and the constant velocity joint. The weight reduction improves driving fuel efficiency, solves the noise problem caused by the connecting components, and solves the quality problem caused by the loosening of the wheel hub nut that fixes the constant velocity joint housing to the wheel hub.

[0030] At the same time, refer to Figure 1 and Figure 2 The wheel guide connecting portion 110 may be formed along the inner periphery of the open surface of the hub housing 100. Additionally, a discharge portion 120 may be formed between the wheel guide connecting portions 110. The discharge portion 120 may form a step with the wheel guide connecting portion 110 along the inner periphery of the open surface of the hub housing 100.

[0031] In an exemplary embodiment of the present invention, the discharge portion 120 is formed as a step along the radial direction of the open surface of the hub housing 100.

[0032] When the wheel guide 200 is engaged, a stop 112 for limiting the depth of engagement of the wheel guide 200 can be formed in the wheel guide connecting portion 110. According to various exemplary embodiments of the present invention, the wheel guide 200 can be press-inserted into and engaged with the wheel guide connecting portion 110 of the wheel hub housing 100. In this case, the stop 112 can limit the depth to which the wheel guide 200 is pressed in.

[0033] As described above, in the hub-integrated constant velocity universal joint according to various exemplary embodiments of the present invention, a stop 112 is formed in the wheel guide connecting portion 110, and the stop 112 limits the depth to which the wheel guide 200 is pressed into the wheel guide connecting portion 110. Therefore, when the wheel guide 200 is pressed into and connected to the wheel guide connecting portion 110, the appropriate pressing depth of the wheel guide 200 can be easily determined, thereby improving work efficiency.

[0034] According to various exemplary embodiments of the present invention, such as Figure 2 As shown, the stop 112 can form a step on the surface of the wheel guide connecting portion 110 of the wheel hub housing 100 that contacts the connecting portion 230 of the wheel guide 200, and this stepped structure can limit the depth of the wheel guide 200 connected to the inner side of the wheel hub housing 100. However, this is merely an example, and various structures or devices other than the wheel guide 200 can be used as the stop 112 in various exemplary embodiments of the present invention, as long as the depth of the wheel guide 200 connected to the wheel hub housing 100 can be limited.

[0035] At the same time, refer to Figure 1 and Figure 2 The discharge portion 120 is formed between the wheel guide connecting portions 110. The discharge portion 120 may form a step with the wheel guide connecting portion 110 and extends from the inner circumferential side of the open surface of the hub housing 100 toward the edge side of the flange 130.

[0036] In other words, since the discharge portion 120 is formed between the wheel guide connecting portions 110 and forms a step with the wheel guide connecting portions 110, and extends from the inner circumferential side of the open surface of the hub housing 100 towards the edge of the flange 130, when the wheel guide 200 is installed in the hub housing 100, the connecting portion 230 of the wheel guide 200 is connected to the wheel guide connecting portion 110 of the hub housing 100. A space can be formed between the discharge portion 120 and the distal surface of the connecting portion 230 of the wheel guide 200, so foreign matter and moisture introduced into the constant velocity universal joint can be discharged to the outside through the space formed between the discharge portion 120 and the distal surface of the connecting portion 230 of the wheel guide 200.

[0037] According to various exemplary embodiments of the present invention, in the hub-integrated constant velocity universal joint according to various exemplary embodiments of the present invention, the number of wheel guide connecting portions 110 is equal to the number of discharge portions 120. For example, such as Figure 1 As shown, when five wheel guide connecting portions 110 are formed in the wheel hub housing 100, five discharge portions 120 can be formed to correspond to the five wheel guide connecting portions 110. However, Figure 1 The present invention illustrates an integral constant velocity universal joint according to various exemplary embodiments of the present invention, and the number of wheel guide connecting portions 110 and the number of discharge portions 120 formed in the wheel hub housing 100 are not limited thereto.

[0038] Furthermore, in the hub-integrated constant velocity joint according to various exemplary embodiments of the present invention, a disassembly hole may be formed for disassembling the constant velocity joint in case of a failure in the internal components of the constant velocity joint.

[0039] At the same time, refer to Figure 3 The wheel guide 200 connected to the hub-integrated constant velocity universal joint according to various exemplary embodiments of the present invention may include a wheel mounting portion 210, a disc mounting portion 220 and a connecting portion 230.

[0040] When installing a wheel, the wheel mounting portion 210 serves to guide the wheel's center ring. In this case, the wheel mounting portion 210 is concentric with the rotation axis of the wheel bearing installed in the wheel hub housing 100. The reason why the center of the wheel mounting portion 210 should be concentric with the rotation axis of the wheel bearing is that if the center of the wheel mounting portion 210 does not match the center of the rotation axis of the wheel bearing, vibration may occur due to the imbalance of rotating weight.

[0041] When installing the brake disc, the disc mounting portion 220 serves to guide the center ring of the brake disc. In this case, similar to the wheel mounting portion 210, the disc mounting portion 220 is concentric with the rotation axis of the wheel bearing mounted in the wheel hub housing 100. The reason why the center of the disc mounting portion 220 should be concentric with the rotation axis of the wheel bearing is that if the center of the disc mounting portion 220 does not match the center of the rotation axis of the wheel bearing, vibration may occur due to the imbalance of rotating weight.

[0042] At the same time, such as Figure 3 As shown, the wheel mounting part 210 and the disc mounting part 220 can form a step with each other.

[0043] In an exemplary embodiment of the present invention, the diameter of the wheel mounting portion 210 is smaller than the diameter of the disc mounting portion 220.

[0044] The connecting portion 230 can be connected to the wheel guide connecting portion 110. When the wheel guide 200 is pressed into and connected to the wheel guide connecting portion 110, the circumferential surface of the connecting portion 230 can make surface contact with the surface of the wheel guide connecting portion 110, and the distal surface of the connecting portion 230 can contact the stop member 112 of the hub housing 100 to limit the depth to which the wheel guide 200 is pressed in.

[0045] According to various exemplary embodiments of the present invention, the wheel guide 200 may be formed with a disassembly hole for disassembling the constant velocity joint in the event of a failure in an internal component of the constant velocity joint. According to another exemplary embodiment of the present invention, the wheel guide 200 may not have a disassembly hole formed.

[0046] like Figure 4 As shown, in the hub-integrated constant velocity joint according to various exemplary embodiments of the present invention, with the wheel guide 200 having the above-described structure connected to the hub housing 100, foreign matter and moisture inside the constant velocity joint can be discharged to the outside through the discharge portion 120. Additionally, as... Figure 5 As shown, when the wheel guide 200 without a disassembly hole is connected to the hub housing 100, moisture inside the constant velocity universal joint can be discharged to the outside through the discharge section 120.

[0047] Meanwhile, the wheel guide 200 connected to the hub-integrated constant velocity universal joint according to various exemplary embodiments of the present invention can be manufactured as a product independent of the hub housing 100. The wheel guide 200 can be manufactured by forging or stamping, and the outer diameters of the wheel mounting portion 210, the disc mounting portion 220, and the connecting portion 230 can be manufactured by lathe machining.

[0048] The hub-integrated constant velocity universal joint according to various exemplary embodiments of the present invention, having the above-described structural features, has the following effects.

[0049] First, the wheel guide 200 connected to the hub housing 100 can be manufactured as a separate product by forging, thereby reducing weight. Even when the wheel guide 200, manufactured as a separate product by forging, is connected to the hub housing 100, foreign matter and moisture introduced into the constant velocity joint can be easily discharged to the outside through the structure of the discharge section 120.

[0050] Additionally, refer to Figure 6 Compared to a conventional constant velocity universal joint without an exhaust portion 120, forming a step in the hub housing 100 to form the exhaust portion 120 can reduce the weight to the same level as the weight of the exhaust portion 120.

[0051] According to various aspects of the present invention, foreign matter and moisture introduced into the constant velocity universal joint can be easily discharged to the outside through the discharge section.

[0052] In addition, an exhaust section is formed in the hub housing, which reduces the weight of the hub housing.

[0053] For ease of interpretation and accurate definition of the appended claims, the terms “upper,” “lower,” “inner,” “outer,” “above,” “below,” “upward,” “downward,” “front,” “back,” “inner,” “external,” “inland,” “outer,” “forward,” and “backward” are used to describe the features with reference to the locations of the exemplary embodiments shown in the accompanying drawings. It will be further understood that the term “connection” or its derivatives refer to both direct and indirect connections.

[0054] For purposes of illustration and description, the foregoing description of specific exemplary embodiments of the invention has been provided. These descriptions are not intended to enumerate or limit the invention to the specific forms disclosed, and it will be apparent that many modifications and variations can be made based on the foregoing teachings. Exemplary embodiments have been selected and described to explain certain principles of the invention and its practical application, enabling those skilled in the art to implement and utilize the various exemplary embodiments of the invention and their various alternatives and modifications. The scope of the invention is intended to be defined by the appended claims and their equivalents.

Claims

1. A hub-integrated constant velocity universal joint, comprising: Multiple wheel guide connecting parts, wherein the wheel guides are connected to the multiple wheel guide connecting parts; as well as A hub housing is formed between the plurality of wheel guide couplings, wherein the hub housing includes at least one discharge portion, the at least one discharge portion forming a step with each of the plurality of wheel guide couplings and discharging foreign objects from the interior space of the hub housing to the exterior of the hub housing. in, The plurality of wheel guide connecting portions are formed along the inner periphery of the open surface of the wheel hub housing; The at least one discharge portion is formed between the plurality of wheel guide coupling portions along the inner periphery of the open surface of the wheel hub housing to form a step with the plurality of wheel guide coupling portions; and The discharge portion extends radially outward from the inner periphery of the open surface of the hub housing than the wheel guide connection portion.

2. The hub-integrated constant velocity universal joint according to claim 1, wherein, The hub housing further includes a flange mounted in the brake disc; and The at least one discharge portion forms a step between the plurality of wheel guide coupling portions and is recessed from the inner circumferential side of the open surface of the hub housing toward the edge of the flange.

3. The hub-integrated constant velocity universal joint according to claim 2, wherein, The at least one discharge portion is formed as a radial step along the open surface of the hub housing.

4. The hub-integrated constant velocity universal joint according to claim 1, wherein, The number of the plurality of wheel guide connecting parts is equal to the number of the at least one discharge part.

5. The hub-integrated constant velocity universal joint according to claim 1, wherein, A stop that limits the depth to which the wheel guide is pressed into the wheel hub housing is formed in at least one of the plurality of wheel guide couplings.

6. The hub-integrated constant velocity universal joint according to claim 5, wherein, The wheel guide includes: The wheel mounting section guides the central ring of the wheel during installation; The disc mounting section guides the center ring of the brake disc during installation; and A connecting portion is connected to the plurality of wheel guide connecting portions, wherein the connecting portion is accommodated on the stop when the wheel guide is pressed into the wheel hub housing.

7. The hub-integrated constant velocity universal joint according to claim 6, wherein, The wheel mounting portion and the disc mounting portion form a stepped structure with each other.

8. The hub-integrated constant velocity universal joint according to claim 7, wherein, The diameter of the wheel mounting part is smaller than the diameter of the disc mounting part.

9. The hub-integrated constant velocity universal joint according to claim 1, wherein, The wheel guide includes: The wheel mounting section guides the central ring of the wheel during installation; The disc mounting section guides the center ring of the brake disc during installation; and The connecting part is connected to the connecting parts of the plurality of wheel guides.

10. The hub-integrated constant velocity universal joint according to claim 9, wherein, The wheel mounting portion and the disc mounting portion form a stepped structure with each other.

11. The hub-integrated constant velocity universal joint according to claim 10, wherein, The diameter of the wheel mounting part is smaller than the diameter of the disc mounting part.

12. The hub-integrated constant velocity universal joint according to claim 1, wherein, The wheel guide is manufactured by forging or stamping.

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