CN222185532U - A friction reduction structure between an outer star wheel and a wheel hub bearing - Google Patents

Abstract

The utility model relates to an antifriction structure between an outer star wheel and a hub bearing, wherein the connecting handle comprises a spline shaft section, the antifriction structure comprises antifriction gaskets, a sliding shaft section and a step shaft section, the sliding shaft section and the step shaft section are both arranged on the connecting handle, the sliding shaft section is arranged at the front side of the wheel body end face of the outer star wheel, the step shaft section is arranged at the front end side of the sliding shaft section and is arranged at the rear side of the spline shaft section, the outer diameter of the step shaft section is larger than the outer diameter of the sliding shaft section, a limiting blocking surface is formed between the step shaft section and the sliding shaft section, the maximum outer diameter of the section of the connecting handle in front of the step shaft section is smaller than the outer diameter of the step shaft section, the antifriction gaskets are elastic ring gaskets, the antifriction gaskets are sleeved on the sliding shaft section and can freely move on the sliding shaft section, the inner diameters of the antifriction gaskets are smaller than the outer diameter of the step shaft section, the difference between the sliding shaft section and the step shaft section is 0.2-0.4 mm, the hub bearing is arranged on the connecting handle, and the end face of the antifriction gaskets are pressed on the wheel body.

Description

Antifriction structure between outer star wheel and hub bearing

Technical Field

The utility model relates to the field of automobile parts, in particular to an antifriction structure between an outer star wheel and a hub bearing.

Background

When two objects are in contact, the contact surface forms an adhesion node due to the adhesion effect. However, when the object is subjected to the load and relatively slides, the adhesive node is sheared and broken, so that the fracture surface vibrates, and the vibration produces sound. When the friction coefficient between the contact surfaces is large, the relative sliding generates relatively severe friction force change, and noise is generated.

In the automobile parts, a connecting handle is arranged on an outer star wheel in the transmission shaft assembly, and the connecting handle is matched with a hub bearing through a spline. The spline fit has fit clearance, and the elastic deformation of the spline shaft causes slight relative sliding between the hub bearing and the contact surface of the end surface of the outer star wheel body under the working conditions of starting and reversing. According to the theory and the actual use condition of the vehicle, abnormal noise occurs in friction between the hub bearing and the end face of the outer star wheel body. This can affect not only the judgment of the driver and the comfort of the passengers, but also the service life of the car.

In the prior art, antifriction gaskets are arranged between a hub bearing and an outer star wheel, and the antifriction gaskets are two types of claw type and riveting type (with flange/flanging) so as to be stably arranged on a connecting handle of the outer star wheel. For example, in the patent applications CN201610806308.4, CN201820523001.8 and CN201610171726.0, jaw-type antifriction washers are used, the inner ring of the antifriction washer has three or more jaws, and the antifriction washer is stably mounted on the connecting handle through the jaws, however, the design may cause cracking at the transition between the jaws and the ring due to stress concentration. For example, in the CN201920311943.4 patent, a structure similar to a rivet-press type antifriction pad is disclosed, and the antifriction pad is provided with a ring-shaped flange along the periphery on one side thereof for tightly fitting the portion of the ball shell portion near the handle portion, and the fit force between the ring-shaped flange and the ball shell portion can ensure that the antifriction pad does not slide and deviate, so that the mutual friction between the end face of the inner ring of the bearing and the end face of the ball shell portion is avoided, however, the rivet-press type antifriction pad is also complicated in structure, and the cracking problem caused by stress concentration can easily occur.

Disclosure of utility model

In view of the above-mentioned drawbacks of the prior art, the present utility model aims to provide an antifriction structure between an outer star wheel and a hub bearing, which has a simple structure, and can eliminate stress concentration and avoid cracking of antifriction pads.

In order to achieve the aim, the utility model provides an antifriction structure between an outer star wheel and a hub bearing, wherein one side of the end face of the wheel body of the outer star wheel is provided with an integrated connecting handle, the connecting handle is used for being connected with the hub bearing, the connecting handle comprises a spline shaft section used for being connected with the hub bearing, the hub bearing is arranged on the spline shaft section and is opposite to the end face of the wheel body of the outer star wheel, the antifriction structure comprises antifriction gaskets, sliding shaft sections and a step shaft section, the sliding shaft sections are arranged on the connecting handle, the sliding shaft sections are arranged on the front side of the end face of the wheel body of the outer star wheel, the step shaft sections are arranged on the front end side of the sliding shaft sections, the outer diameter of the step shaft sections is larger than the outer diameter of the sliding shaft sections, limiting blocking surfaces are formed between the sliding shaft sections, the maximum outer diameter of the section of the connecting handle in front of the step shaft sections is smaller than the outer diameter of the step shaft sections, the antifriction gaskets are elastic ring gaskets, the antifriction gaskets are sleeved on the sliding shaft sections and can freely move on the sliding shaft sections, the inner diameters of the step gaskets are smaller than 0.4mm, and the difference between the two antifriction gaskets are arranged on the end faces of the wheel bodies, and the end faces of the friction reducing gaskets are pressed on the end faces of the wheel bodies.

Further, the step shaft section and the spline shaft section are in smooth transition.

Further, the antifriction gasket comprises a gasket base body and antifriction material coatings arranged on two side end faces of the gasket base body.

Further, the thickness of the gasket base body is 1mm, and the thickness of the antifriction and antifriction material coating is 25-35 mu m.

Further, the gasket base material is 65Mn spring steel or SPCC cold-rolled carbon steel.

Further, the antifriction and antifriction material coating is a Xylan teflon coating or a dupont D6600 coating.

As described above, the antifriction structure of the present utility model has the following advantageous effects:

The friction reducing gasket has the advantages of simple structure, simple manufacturing process, low manufacturing cost, no cracking caused by stress concentration, good effect in eliminating abnormal noise and solving the problem of gasket cracking, integrated supply of the friction reducing gasket and the connecting handle is ensured by the matched outer star wheel structure, the loading efficiency of a whole vehicle factory is improved, good popularization and practical value are realized, and the market competitiveness is improved after popularization and application. In summary, the present utility model effectively overcomes the disadvantages of the prior art and has high industrial utility value.

Drawings

FIG. 1 is a schematic illustration of the installation of friction reducing shims of the present utility model between a hub bearing and an outer star wheel.

Figure 2 is a schematic illustration of the structure of the friction reducing shim of the present utility model.

Figure 3 is a full cross-section of an antifriction pad in accordance with the present utility model.

FIG. 4 is a schematic view of the structure of the sliding shaft section and the stepped shaft section in the present utility model

Fig. 5 is an enlarged view of circle a of fig. 4.

FIG. 6 is a schematic view of the installation of friction reducing washers on a sliding axle segment in accordance with the present utility model

Fig. 7 is an enlarged view of circle B of fig. 6.

Description of the reference numerals

1. Hub bearing

2. Outer star wheel

21. Wheel body end face

3. Connecting handle

31. Threaded shaft section

32. Spline shaft section

33. Step shaft section

34. Sliding shaft section

35. Spacing baffle

36. Tool retracting groove

4. Antifriction gasket

Detailed Description

Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present utility model, which is described by the following specific examples.

It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the utility model to the extent that it can be practiced, since modifications, changes in the proportions, or adjustments of the sizes, which are otherwise, used in the practice of the utility model, are included in the spirit and scope of the utility model which is otherwise, without departing from the spirit or scope thereof. Also, the terms such as "upper", "lower", "left", "right", "middle", etc. are used herein for convenience of description, but are not to be construed as limiting the scope of the utility model, and the relative changes or modifications are not to be construed as essential to the scope of the utility model.

Referring to fig. 1 to 7, the present utility model provides an antifriction structure between an outer star wheel 2 and a hub bearing 1, wherein a connecting handle 3 is integrally formed on one side of a wheel body end surface 21 of the outer star wheel 2, the connecting handle 3 is used for connecting with the hub bearing 1, and the connecting handle 3 and the outer star wheel 2 are an integral part as a part of a transmission shaft assembly. The connecting handle 3 comprises a spline shaft section 32 used for being connected with the hub bearing 1, the spline shaft section 32 is provided with a spline, the connecting handle 3 is positioned on the front side of the spline shaft section 32 and can be collectively called as a front section, the front section generally comprises a threaded shaft section 31, when the connecting handle is installed, the hub bearing 1 is installed on the spline shaft section 32, the hub bearing 1 and the hub end face 21 of the external star wheel 2 are driven through the spline, the hub bearing 1 is kept opposite to the hub end face 21 of the external star wheel 2, and the hub bearing 1 is tightly pressed on the threaded shaft section 31 by utilizing a nut in a threaded manner so as to be abutted against the hub end face 21 of the external star wheel 2, and the axial fixation is kept.

The antifriction structure comprises antifriction gaskets 4, a sliding shaft section 34 and a step shaft section 33 which are all positioned on a connecting handle 3, wherein the sliding shaft section 34 is positioned at the front side of a wheel body end face 21 of an outer star wheel 2, the step shaft section 33 is positioned at the front end side of the sliding shaft section 34 and is positioned at the rear side of a spline shaft section 32, the outer diameter of the step shaft section 33 is larger than that of the sliding shaft section 34, a limiting blocking surface 35 is formed between the two, the largest outer diameter dimension of a section of the connecting handle 3 in front of the step shaft section 33 is smaller than that of the step shaft section 33, the antifriction gaskets 4 are elastic ring gaskets, the antifriction gaskets 4 are sleeved on the sliding shaft section 34 and can move freely on the sliding shaft section 34, namely the inner hole diameter of each antifriction gasket 4 is larger than that of the sliding shaft section 34, the thickness is smaller than that of the sliding shaft section 34, the inner diameter of each antifriction gasket 4 is smaller than that of the step shaft section 33, the difference between the two is 0.2-0.4 mm, the hub bearing 1 is arranged on the connecting handle 3, and the end face compresses the antifriction gaskets 4 on the wheel body end face 21.

When the antifriction pad 4 of the utility model is used, referring to fig. 1, 6 and 7, the antifriction pad 4 is assembled with the outer star wheel 2 and then transported together and subjected to subsequent assembly work, specifically, the antifriction pad 4 is sleeved from the front end of the connecting handle 3, a special press-fitting tool, such as a sleeve structure, is used for pressing the antifriction pad through the threaded shaft section 31, the spline shaft section 32 and the step shaft section 33, the antifriction pad 4 is deformed to a certain extent when passing through the step shaft section 33 and then pressed onto the sliding shaft section 34, and the antifriction pad 4 is not separated from the step shaft section 33 due to the existence of the limit stop surface 35 between the step shaft section 33 and the sliding shaft section 34, so that stable installation of the antifriction pad 4 on the connecting handle 3 is realized, and the antifriction pad 4 is not separated in the subsequent transportation and assembly work, therefore a manufacturer can manufacture and assemble the antifriction pad 4 with the outer star wheel 2 and then integrally assemble the antifriction pad 4 to a customer, and the customer is prevented from needing to be paired and assembled on site.

When the hub bearing 1 and the outer star wheel 2 are assembled, referring to fig. 1, the hub bearing 1 is tightly pressed by using the locking nut, the antifriction gasket 4 is tightly pressed on the wheel body end face 21 by the hub bearing 1, the two end faces of the antifriction gasket 4 are respectively well attached to the wheel body end face 21 and the wheel body end face 1, the direct contact of the hub bearing 1 and the wheel body end face 21 of the outer star wheel 2 is avoided, the friction characteristic of the contact surface of the hub bearing 1 and the outer star wheel 2 is changed, and abnormal noise generated by friction between the hub bearing 1 and the wheel body end face 21 of the outer star wheel 2 under starting and reversing working conditions is eliminated. And, compared with the prior art, the traditional design thought has been changed, antifriction gasket 4 is a simple ring structure gasket, and two terminal surfaces are plane and each other parallel around, when antifriction between hub bearing 1 and outer star wheel 2, antifriction gasket 4 does not have stress concentration condition to avoid appearing antifriction gasket 4 cracking condition, job stabilization is reliable, long service life.

In the present embodiment, referring to fig. 5 and 6, as a preferred design, the smooth transition between the stepped shaft section 33 and the spline shaft section 32 is made, the circumferential surface of the front end portion of the stepped shaft section 33 gradually increases gradually and gently from front to rear, so that the antifriction pad 4 can be conveniently passed through the stepped shaft section 33, and the assembly is facilitated, and at the same time, the structure of the transition section makes the stress concentration of the connection handle 3 small, and makes the strength of the outer star wheel higher. The limiting stop surface 35 between the step shaft section 33 and the sliding shaft section 34 can be processed into a chamfer, and can be processed into a round angle. When the step shaft section 33 and the sliding shaft section 34 are processed, a cutter retracting groove 36 structure is processed on the wheel body end face 21 of the outer star wheel 2, so that the cutter retracting is convenient for hard turning. In a general outer star wheel structure, the transition form from the wheel body end face 21 to the connecting handle 3 is a round corner transition, and the round corner structure easily causes that the antifriction gasket 4 cannot be compacted and cannot be completely contacted with the wheel body end face 21. By adding the clearance groove 36, the sliding shaft section 34 can be completely straight along the axial direction at the part close to the wheel body end face 21, or the outer surface of the sliding shaft section can be in a circular arc shape, and the bending radian is small, so that the antifriction gasket 4 can be compacted on the wheel body end face 21, the inner hole of the antifriction gasket 4 cannot be extruded by the part of the sliding shaft section 34 close to the wheel body end face 21, and the deformation of the gasket is avoided, and the antifriction performance is influenced.

In this embodiment, referring to fig. 2 and 3, as a preferred design, the antifriction spacer 4 includes a spacer body and antifriction material coatings provided on both side end surfaces of the spacer body, the spacer body may be made of 65Mn spring steel or SPCC cold-rolled carbon steel, and the spacer body may be heat treated or not by press forming, and the thickness of the spacer body is preferably 1mm. The thickness of the antifriction and antifriction material coating is 25-35 mu m, and the Xylan Teflon coating or the DuPont D6600 coating can be adopted, so that a good antifriction effect can be realized. In other embodiments, other suitable materials and thickness dimensions for the friction reducing pads 4 may be used.

The antifriction structure between the outer star wheel and the hub bearing has the following beneficial effects:

The friction reducing gasket 4 has the advantages of simple structure, simple manufacturing process, low manufacturing cost, no cracking caused by stress, good effects in eliminating abnormal noise and solving the problem of gasket cracking, and the matched outer star wheel 2 structure also ensures the integrated supply of the friction reducing gasket 4 and the connecting handle 3, improves the loading efficiency of a whole vehicle factory, has good popularization and practical value, and can improve market competitiveness after popularization and application. In summary, the present utility model effectively overcomes the disadvantages of the prior art and has high industrial utility value.

The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims (6)

1. An antifriction structure between an outer star wheel and a hub bearing is characterized in that the antifriction structure comprises antifriction gaskets (4), a sliding shaft section (34) and a step shaft section (33) which are both positioned on the connecting handle (3), the sliding shaft section (34) is positioned on the front side of the wheel body end surface (21) of the outer star wheel (2), the step shaft section (33) is positioned on the front end side of the sliding shaft section (34) and is positioned on the rear side of the spline shaft section (32), the outer diameter of the step shaft section (33) is larger than the outer diameter of the sliding shaft section (34), a limit stop surface (35) is formed between the two, the sliding shaft section (34) is positioned on the front side of the wheel body end surface (21) of the outer star wheel (2), the sliding shaft section (34) is positioned on the outer diameter of the sliding shaft section (4), the sliding shaft section (3) can move on the circular sleeve (34) and is positioned on the largest outer diameter of the sliding shaft section (4, the inner diameter of the antifriction gasket (4) is smaller than the outer diameter of the step shaft section (33), the difference value of the inner diameter and the step shaft section is 0.2-0.4 mm, the hub bearing (1) is arranged on the connecting handle (3), and the antifriction gasket (4) is tightly pressed on the end face (21) of the wheel body by the end face of the hub bearing.

2. An antifriction structure in accordance with claim 1 characterized in that the step shaft section (33) and spline shaft section (32) transition smoothly.

3. An antifriction structure in accordance with claim 1 characterized in that the antifriction pads (4) comprise a pad body and a coating of antifriction and antifriction material provided on both side faces of the pad body.

4. The friction reducing structure according to claim 3, wherein the thickness of the gasket base body is 1mm, and the thickness of the friction reducing and wear resistant material coating is 25-35 μm.

5. An antifriction structure in accordance with claim 3 wherein the material of the shim stock is 65Mn spring steel or SPCC cold rolled carbon steel.

6. An antifriction structure in accordance with claim 3 or 5 characterized in that the antifriction and antifriction material coating is a Xylan teflon coating or dupont D6600 coating.