Hub mounting structure

Abstract

The utility model relates to a kind of hub mounting structure, comprising: with the width direction of vehicle as axial fixed on the main shaft of vehicle body;Hub is inserted into the outer end of main shaft;At least two bearings for supporting the rotation of hub are arranged in the hub interior along the axial spacing, between main shaft and hub;Spacer is set between two bearings, for keeping constant interval, the inner circumferential surface of hub is formed with the recess opposite with the outer circumferential surface of spacer, the outer circumferential surface of spacer is formed with the protrusion opposite with the inner circumferential surface of hub, by the protrusion is inserted into recess, spacer is kept in the hub interior.

Description

Technical Field

[0001] The technology disclosed herein relates to a hub mounting structure. Background Technology

[0002] International Publication No. WO2024 / 184943 discloses a structure for mounting a vehicle wheel hub on a main shaft. One known structure includes two bearings spaced axially inside the wheel hub, with a sleeve (called a "shield" or "spacer") serving as a spacer between the two bearings. This spacer improves the rotational accuracy of the wheel hub by maintaining a constant distance between the two bearings and also distributes the load evenly across the bearings.

[0003] However, in traditional designs, after the hub is inserted into the spindle, a spacer needs to be inserted through the narrow gap between the inner circumferential surface of the hub and the outer circumferential surface of the spindle. Due to the extremely limited working space and the need for precise alignment of the spacer, this operation requires skilled workers and is inefficient. Furthermore, if the spacer shifts or tilts during assembly, the axial position of the bearing will be misaligned, potentially leading to increased rotational resistance or premature bearing wear. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems by pre-maintaining a spacer inside the hub, making the installation of the hub relative to the spindle easier and reliably maintaining a constant bearing spacing, thereby providing an improved hub mounting structure.

[0005] The first technical solution is a wheel hub mounting structure, which includes: a main shaft fixed to the vehicle body axially in the vehicle width direction; a wheel hub inserted into the outer end of the main shaft; at least two bearings arranged axially at intervals inside the wheel hub, located between the main shaft and the wheel hub, for supporting the rotation of the wheel hub relative to the main shaft; and a spacer disposed between the two bearings for maintaining a constant spacing, wherein a groove is formed on the inner circumferential surface of the wheel hub opposite to the outer circumferential surface of the spacer, and a protrusion is formed on the outer circumferential surface of the spacer opposite to the inner circumferential surface of the wheel hub, and the spacer is held inside the wheel hub by inserting the protrusion into the groove.

[0006] The second technical solution is a hub mounting structure according to the first technical solution, wherein the groove extends axially along the inner circumferential surface of the hub, and the protrusion of the spacer engages with the groove along its entire length.

[0007] The third technical solution is the hub mounting structure according to the first technical solution, wherein the spacer has a cylindrical main body and a protrusion is integrally formed on the outer peripheral surface of the main body. Attached Figure Description

[0008] Figure 1This is a cross-sectional view of the outer end of the main shaft with the hub mounted on it.

[0009] Figure 2 For along Figure 1 2-2 line cut cross-section of the wheel hub. Detailed Implementation

[0010] The following combination Figure 1 and Figure 2 The embodiments of this utility model will be described in detail below. In the figures, arrow I indicates the inner side in the vehicle width direction, and arrow O indicates the outer side in the vehicle width direction. In the following description, unless otherwise specified, the "front-back," "up-down," and "left-right" directions are based on the vehicle's driving direction.

[0011] This utility model relates to a wheel hub mounting structure 10 suitable for the wheel support structure of vehicles (such as racing cars, go-karts, etc.), and in particular to a structure that can conveniently and reliably maintain the spacer inside the wheel hub.

[0012] like Figure 1 As shown, the wheel hub mounting structure 10 of this embodiment includes: a main shaft 12 fixed to the vehicle; a wheel hub 40 rotatably mounted on the main shaft 12; two bearings 20 disposed between the two; and a spacer 30 located between the two bearings to maintain a constant distance between them. The main shaft 12 is a cylindrical fixed shaft axially fixed to the vehicle body in the vehicle width direction, and may be integrally formed in a steering knuckle or bearing housing, for example. The wheel hub 40 is mounted on the outer end of the main shaft 12, and the wheel rim and tire are mounted through the wheel hub 40.

[0013] An anti-detachment component 14 and a fixing component 16 are provided at the outer end of the main shaft 12 to prevent the hub 40 from detaching. The anti-detachment component 14 is an annular member that contacts the end face of the hub, and the fixing component 16 is a fastener such as a nut, which is fixed to the main shaft 12 by threaded connection to prevent the hub 40 from detaching axially.

[0014] Two bearings 20 are arranged axially spaced inside the hub 40. These bearings 20 are located between the main shaft 12 and the hub 40 to smoothly support the rotation of the hub.

[0015] Each bearing 20 includes: an inner ring 22 fixed to the outer circumferential surface of the main shaft 12, an outer ring 24 pressed and fixed to the inner circumferential surface of the hub 40, and a plurality of rolling elements 26 arranged between the two. The rolling elements 26 are spherical, and arc-shaped raceways are formed on the opposing surfaces of the inner ring 22 and the outer ring 24 to accommodate and guide a portion of the rolling elements 26. As a result, the hub 40 can achieve low-friction, smooth rotation relative to the main shaft 12.

[0016] like Figure 1 and Figure 2As shown, a spacer 30 is provided between two bearings 20. The spacer 30 serves as a spacer to maintain a constant axial distance between the two bearings. The spacer 30 includes a cylindrical main body 32 and a protrusion 34 formed on its outer peripheral surface.

[0017] The main body 32 is a cylindrical component extending along the width direction of the vehicle, and its dimensions are set to maintain the bearing 20 spacing with high precision. The protrusion 34 protrudes radially outward from the outer peripheral surface of the main body 32 and extends axially. The protrusion 34 is formed on the outer peripheral surface of the spacer 30 in a region opposite to the inner peripheral surface of the hub 40.

[0018] A groove 42 for holding the spacer 30 is formed on the inner circumferential surface of the hub 40. The groove 42 extends along the axial direction of the hub 40, and its cross-section can be semi-circular or rectangular. The size and shape of the groove 42 match the protrusion 34 of the spacer 30. When the protrusion 34 is inserted into the groove 42, the spacer 30 is temporarily fixed inside the hub 40.

[0019] Therefore, before installing the hub 40 onto the spindle 12, the spacer 30 can be pre-fixed inside the hub 40, eliminating the need to insert the spacer through a narrow gap after inserting the spindle as is the traditional method, thus significantly improving work efficiency.

[0020] During assembly, first insert the protrusion 34 of the spacer 30 into the groove 42 on the inner circumferential surface of the hub 40, so that the spacer 30 is positioned and held inside the hub. Then insert the hub 40 into the spindle 12, and the spacer 30 is in the correct position between the two bearings 20.

[0021] In this state, tightening the fixing component 16 allows the hub 40 to rotate freely relative to the main shaft 12. Because the spacer 30 maintains a constant distance between the bearings 20, the axial load on the bearings 20 is evenly distributed, thereby preventing increased rotational resistance and shortened bearing life.

[0022] According to the hub mounting structure 10 of this utility model, the following effects can be obtained: (1) Simplified installation operation: Since the spacer 30 can be pre-held in the hub 40, no additional insertion is required during installation, making the operation simple; (2) Improved assembly accuracy: The spacer 30 is precisely positioned by the engagement of the protrusion 34 and the groove 42, ensuring accurate bearing spacing and improving rotation accuracy; (3) Preventing spacer detachment: The spacer 30 is mechanically held in the hub 40 and will not detach during assembly or operation; (4) Improved reliability and durability: The bearing spacing is stable, preventing uneven load, extending bearing life and improving long-term performance.

[0023] In summary, the hub mounting structure 10 of this embodiment is characterized by having a protrusion 34 on the outer circumferential surface of the spacer 30, which is inserted into a groove 42 formed on the inner circumferential surface of the hub 40. This allows the spacer 30 to be held inside the hub 40 before installation, simplifying the installation process and ensuring high rotational accuracy and reliability.

[0024] All documents, patent applications and technical standards cited in this specification are incorporated herein by reference in their entirety.

Claims

1. A hub mounting structure, characterized in that, include: A main shaft is fixed to the vehicle body along the width direction of the vehicle axis; a wheel hub is inserted into the outer end of the main shaft; at least two bearings are arranged axially at intervals inside the wheel hub, located between the main shaft and the wheel hub, for supporting the rotation of the wheel hub relative to the main shaft; a spacer is disposed between the two bearings to maintain a constant spacing, a groove is formed on the inner circumferential surface of the wheel hub that is opposite to the outer circumferential surface of the spacer, and a protrusion is formed on the outer circumferential surface of the spacer that is opposite to the inner circumferential surface of the wheel hub, and the spacer is held inside the wheel hub by inserting the protrusion into the groove.

2. The hub mounting structure according to claim 1, characterized in that, The groove extends axially along the inner circumferential surface of the hub, and the protrusion of the spacer engages with the groove along its entire length.

3. The hub mounting structure according to claim 1, characterized in that, The spacer has a cylindrical main body, with a protrusion integrally formed on the outer peripheral surface of the main body.

Images