CN107816484B

CN107816484B - Joint washer for constant velocity joint

Info

Publication number: CN107816484B
Application number: CN201710307121.4A
Authority: CN
Inventors: 金春荣; 赵富诚
Original assignee: Bong Sung BS Co ltd
Current assignee: Bong Sung BS Co ltd
Priority date: 2016-09-12
Filing date: 2017-05-04
Publication date: 2020-06-16
Anticipated expiration: 2037-05-04
Also published as: CN107816484A; KR101707201B1

Abstract

The present invention relates to a joint washer for a constant velocity joint. A joint washer for a constant velocity universal joint is a washer which is joined between a constant velocity universal joint (10) and a hub (20), and is configured as a plate-like ring body in which a copper alloy layer (36) and a Teflon layer (37) are formed on the surface of a steel bottom plate (35), and an opening (31) having an inner diameter larger than the diameter of a shaft (11) of the constant velocity universal joint (10) is formed in the center thereof. According to the invention, the contact surface between the constant velocity universal joint (10) and the hub (20) can be tightly connected, thereby minimizing the vibration and noise generated during the operation of the automobile.

Description

Joint washer for constant velocity joint

Technical Field

The present invention relates to a gasket coupled between a constant velocity joint (constant velocity joint)10 and a hub (heelhub) 20, the gasket being configured as a plate-shaped ring body in which a copper alloy layer 36 and a teflon layer (teflon layer) 37 are formed on a surface of a steel bottom plate 35, and an opening 31 is formed in a central portion thereof, the opening 31 having an inner diameter larger than a diameter of a shaft 11 of the constant velocity joint 10.

Background

The constant velocity universal joint 10 is a shaft connecting body for transmitting a rotational force at a constant angular velocity regardless of the intersection angle between a driving shaft and a driven shaft, and a washer for surface contact with the rear end of a hub 20 is coupled to a driven shaft outer ring 12 connected to a wheel through the hub 20, and korean laid-open patent No. 2008-32565 is an example of a related prior art.

The conventional constant velocity joint 10, as represented by korean laid-open patent No. 2008-32565, is a simple metal ring body, like other washers, and its function is limited to providing a contact surface between both side members, and is made of hard metal like the outer race 12 and the hub 20 of the constant velocity joint 10, so that wear and damage of the contact surface inevitably occur during long-term use.

That is, the conventional constant velocity joint 10, the washer, and the hub 20 are basically a direct steel-to-steel connection structure, and can only absorb and support vibration and shock generated during use to a limited extent.

In particular, in terms of the characteristics of the components directly subjected to the impact generated by the running of the automobile, not only the washer itself but also the washer contact portions of the constant velocity joint 10 and the hub 20 are rapidly worn, and such wear and damage occur concentrated on a specific portion of the contact surface or irregularly, whereby not only external impact but also repeated vibration and impact occur during the rotation of the constant velocity joint 10, the hub 20, and the related components are severely damaged by fatigue.

Disclosure of Invention

The present invention has been made in view of the above problems, and provides a joint washer for a constant velocity universal joint, which is formed as a plate-shaped ring body having a copper alloy layer 36 formed on a surface of a steel base plate 35 and a teflon layer 37 formed on a surface of the copper alloy layer 36, and is provided between an outer race 12 and a hub 20 of the constant velocity universal joint 10, and has an opening 31 formed in a central portion thereof, the opening 31 having an inner diameter larger than a diameter of a shaft 11 of the constant velocity universal joint 10, the joint washer 30 for a constant velocity universal joint being in close contact with a rear end surface of the hub 20 on the constant velocity universal joint 10 side and an outer end surface of the shaft 11 of the outer race 12 of the constant velocity universal joint 10.

In the joint washer for a constant velocity universal joint according to the present invention, a projecting ring body 32 having an inner diameter corresponding to the diameter of the outer end of the shaft 11 of the outer race 12 of the constant velocity universal joint 10 is formed on the outer periphery of the joint washer 30, and the projecting ring body 32 is coupled to the outer race 12 of the constant velocity universal joint 10 to fix the joint washer 30 concentrically with the shaft 11. Alternatively, in the joint washer for a constant velocity universal joint according to the present invention, a plurality of curved support plates 33 that protrude inward and are curved toward the hub 20 are formed in the opening 31 of the joint washer 30, and the joint washer 30 is fixed concentrically with the shaft 11 as the curved support plates 33 are brought into close contact with the rear end portion of the shaft 11.

Effects of the invention

According to the present invention, the contact surfaces between the constant velocity universal joint 10 and the hub 20 can be tightly coupled, thereby minimizing vibration and noise generated during the operation of the automobile.

In particular, abrasion and damage that may occur in the joint portion between the constant velocity joint 10 and the hub 20 are suppressed, so that a tight coupling structure of the constant velocity joint 10 and the hub 20 can be maintained for a long time, and vibration, noise, and damage that may occur under external impact and during self-rotation can be minimized.

Drawings

Fig. 1 is a representative sectional view of the mounted state of the present invention.

Fig. 2 is an explanatory view of a coupling mode of the present invention.

Fig. 3 is a partially cut-away perspective view of the bonded state of the present invention.

Fig. 4 is a partially cut-away perspective view of the present invention.

Fig. 5 is a perspective view showing a coupled state of an embodiment of the present invention to which a supporting curved plate is applied.

Fig. 6 is a representative sectional view of the installed state of the embodiment of fig. 5.

Description of the reference symbols

10 constant velocity joint

11 axle

12 outer wheel

20 wheel hub

30 coupling washer

31 opening part

32 projecting ring body

33 support curved plate

35 bottom plate

36 copper alloy layer

37 Teflon layer

Detailed Description

Hereinafter, a specific structure of the present invention will be described with reference to the drawings.

First, fig. 1 is a view illustrating a constant velocity universal joint 10 and a hub 20 that are coupled to each other by applying the present invention, and as shown in the drawing, in the present invention, as a washer provided between an outer race 12 and the hub 20 of the constant velocity universal joint 10, the washer is coupled between an end surface of the outer race 12 of the constant velocity universal joint 10 and a rear end surface of the hub 20.

That is, as shown in fig. 2, the joint washer 30 of the present invention is a plate-shaped ring body having an opening 31 formed at the center thereof and having an inner diameter larger than the diameter of the shaft 11 of the constant velocity joint 10, and has front and rear surfaces respectively in close contact with the rear end surface of the hub 20 on the constant velocity joint 10 side and the outer end surface of the shaft 11 of the outer ring 12 of the constant velocity joint 10.

As shown in fig. 2 and 3, the opening 31 formed in the center portion of the coupling washer 30 of the present invention is formed to have an inner diameter sufficiently larger than the diameter of the shaft 11, particularly, an inner diameter sufficiently larger than the diameter of the enlarged diameter portion of the shaft 11 formed at the connecting portion between the shaft 11 and the outer ring 12, so that direct contact between the shaft 11 and the coupling washer 30 is avoided, thereby preventing lateral movement of the coupling washer 30 caused when the shaft 11 and the coupling washer 30 are directly contacted.

Since the constant velocity joint 10 and the hub 20 are basically connected by tightening screws along the axial direction of the shaft 11 in a state where the shaft 11 of the constant velocity joint 10 is inserted into the hub 20 as shown in fig. 1, and the rotational force of the constant velocity joint 10 is transmitted to the hub 20, the dynamic connection point between the constant velocity joint 10 and the hub 20 is the tip of the shaft 11, and as shown in fig. 1, a clearance for ensuring the assembling workability is inevitably formed between the outer peripheral surface of the rear end portion of the shaft 11 in a coupled state and the inner peripheral surface of the hub 20, and therefore, fine eccentric rotation or vibration occurs with the tip of the shaft 11 of the constant velocity joint 10 as a fulcrum during the operation of the automobile.

When the shaft 11 and the coupling washer 30 are in direct contact, the eccentric rotation or the vibration is transmitted to the coupling washer 30 as it is, and a force for moving the coupling washer 30 is repeatedly applied in the lateral direction, that is, in the direction perpendicular to or intersecting the axial direction of the shaft 11, and if such lateral movement of the coupling washer 30 occurs, even if it occurs slightly, the coupling state between the coupling washer 30 and the constant velocity joint 10 and the hub 20 becomes loose, so that the inner diameter of the opening 31 of the coupling washer 30 is sufficiently increased, and the direct contact between the coupling washer 30 and the shaft 11 is blocked, and particularly the contact at the rear end expanded diameter portion of the shaft 11 is also blocked.

That is, in the present invention, it is preferable that the inner diameter of the opening 31 of the coupling washer 30 is larger than not only the diameter of the rear end enlarged diameter portion of the shaft 11 but also the inner diameter of the rear end clearance forming portion of the hub 20.

Such a coupling washer 30 of the present invention is provided in the following manner: as shown in fig. 3, the end of the outer race 12 of the constant velocity universal joint 10 is temporarily bonded to the back surface of the joint washer 30, and then the shaft 11 of the constant velocity universal joint 10 is inserted into the hub 20 and the screws are bonded as shown in fig. 2. As described above, the coupling washer 30 of the present invention has the opening portion 31 with an inner diameter larger than the diameter of the shaft 11, and thus the protruding ring body 32 is formed at the outer contour of the coupling washer 30 to fix the coupling washer 30 to an accurate position on the outer contour 12 at the time of assembling work.

That is, as shown in fig. 2 and 3, a projecting ring body 32 having an inner diameter that matches the diameter of the outer end of the shaft 11 of the outer race 12 of the constant velocity joint 10 is formed on the outer contour of the joint washer 30, and by joining this projecting ring body 32 to the end of the outer race 12 of the constant velocity joint 10, the joint washer 30 can be fixed to the constant velocity joint 10 concentrically with the shaft 11 even before the constant velocity joint 10 is assembled with the hub 20.

In this way, the joint washer 30 of the present invention, which is mounted between the front end portion of the outer race 12 of the constant velocity joint 10 and the rear end portion of the hub 20, maintains a tight and stable joint state between the constant velocity joint 10 and the hub 20, which is achieved by the multilayer structure as shown in fig. 4.

As shown in fig. 4, the plate-shaped ring body constituting the joint washer 30 of the present invention is formed by forming copper alloy layers 36 on both side surfaces of a steel base plate 35 and forming teflon layers (teflon layers) 37 on the surfaces of the copper alloy layers 36.

In the multilayer structure of the joint washer 30 of the present invention, the steel bottom plate 35 performs a function of holding the structure and form of the joint washer 30, and realizes excellent deformability and restorability with respect to the copper alloy layer 36, which is a soft metal, to thereby enable the constant velocity universal joint 10 and the hub 20 to be closely and stably in close contact therewith, and the teflon layer 37 also realizes more sensitive deformability and restorability to thereby realize a uniform contact effect over the entire contact surface.

Next, a process for manufacturing the coupling washer 30 of the present invention having such a multilayer structure will be described.

First, a copper alloy powder is coated on the surface of the steel base plate 35 in a uniform thickness, and then the copper alloy powder is sintered by heating, thereby forming a copper alloy layer 36 on the surface of the base plate 35.

The main materials of the copper alloy constituting the copper alloy layer 36 are copper (Cu) and tin (Sn), and a small amount of lead (Pb) may be added, and the mixing ratio of copper and tin is preferably 80 to 95 wt% of copper and 5 to 20 wt% of tin.

Further, as the steel base plate 35, a copper-plated steel plate having a surface previously plated with copper is used, thereby forming a stronger and more stable copper alloy layer 36.

After the copper alloy layer 36 is formed, a teflon layer 37 is formed by coating teflon (teflon) on the surface of the copper alloy layer 36, and the teflon layer 37 is mixed with an additive such as carbon black (carbon black) in addition to teflon, thereby improving wear resistance.

After the teflon layer 37 is formed, the multilayer plate body composed of the bottom plate 35, the copper alloy layer, and the teflon layer 37 is rolled to a predetermined thickness, and then the rolled multilayer plate body is molded by press working or the like, thereby completing the coupling gasket 30 of the present invention.

In addition, fig. 5 and 6 illustrate an embodiment in which the support curved plate 33 is applied, and the projecting ring body 32 described above can be omitted by forming the support curved plate 33, so that it is possible to prevent any projection from being formed to the outside of the front end portion of the outer race 12 of the constant velocity universal joint 10, and it is possible to provide the joint washer 30 without any interference with other components related to the constant velocity universal joint 10 and the hub 20.

That is, as shown in fig. 5, a plurality of support bent plates 33 that protrude inward and are bent toward the hub 20 side are radially formed at equal angles around the center of the coupling washer 30 in the opening 31 of the coupling washer 30, and the coupling washer 30 is fixed concentrically with the shaft 11 as the support bent plates 33 are brought into close contact with the outer peripheral surface of the rear end portion of the shaft 11, and as shown in the enlarged circle part of fig. 6, the tip end portion of the support bent plate 33 brought into close contact with the outer peripheral surface of the rear end portion of the shaft 11 is inserted into the clearance formed between the shaft 11 and the inner peripheral surface of the rear end of the hub 20, so that the degree of close contact of the coupling washer 30 is not lowered by the support bent plates 33.

Claims

1. A coupling washer (30) for a constant velocity joint, characterized in that,

the joint washer (30) for a constant velocity universal joint is formed into a plate-shaped ring body, is provided between an outer ring (12) and a hub (20) of the constant velocity universal joint (10), has an opening (31) formed in the center portion, the opening (31) having an inner diameter larger than the diameter of a shaft (11) of the constant velocity universal joint (10), the joint washer (30) for a constant velocity universal joint is in close contact with the rear end surface of the hub (20) on the constant velocity universal joint (10) side and the outer end surface of the shaft (11) of the outer ring (12) of the constant velocity universal joint (10), the plate-shaped ring body is formed with copper alloy layers (36) on both side surfaces of a steel base plate (35), and a Teflon layer (37) is formed on the surface of the copper alloy layer (36),

a plurality of supporting bent plates (33) which protrude inward and are bent toward the hub (20) side are radially formed at equal angles on the opening (31) of the coupling washer (30) around the center of the coupling washer (30),

the coupling washer (30) is fixed concentrically to the shaft (11) as the support bent plate (33) comes into close contact with the outer peripheral surface of the rear end portion of the shaft (11), the distal end portion of the support bent plate (33) is thrown into a clearance formed between the shaft (11) and the inner peripheral surface of the rear end of the hub (20), the support bent plate (33) comes into close contact with the shaft (11) and the outer ring (12), and the boundary portion of the support bent plate (33) comes into close contact with the shaft (11) and the outer ring (12).