JPS6333015Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention consists of a member attached to the housing,
The present invention relates to a sealing device that has two members, a member attached to a shaft, and a sealing device that seals between a housing and a shaft by bringing both members into sliding contact with each other on a plane perpendicular to the shaft.

(Prior Art) As a sealing device of this type, for example, as shown in FIG. A device is known in which the housing 1 and the shaft 3 are sealed, and the sealing ring 2 and the sealing member 4 are
are separated from each other, and are separately attached to the housing and shaft during assembly.

(Problem to be solved by the invention) However, in such a structure, the sealing ring and the sealing member are completely separated, so special consideration is required during transportation, storage, etc., and handling is difficult. This is extremely troublesome and requires special jig parts during assembly.

When assembling, since each component is attached individually, assembly time is required, and mutual position adjustment is troublesome. There are drawbacks such as.

In this regard, for example, as shown in Japanese Patent Application Laid-Open No. 160953/1983, two radial portions with different diameters are provided at both ends of the sliding member in the axial direction, and the sealing member is attached to both ends. The seal lip portion of the seal member is configured to be sandwiched between the radial portions, and the seal lip portion of the seal member is elastically deformed so as to be able to pass over the radial end edge of either one of the radial portions provided with the sliding member. By doing so, the sealing member and sliding member, which were manufactured separately, can be easily assembled and integrated with one touch, and subsequent handling and attachment to the rotating mechanism can be carried out in an integrated state. Something has been devised that makes this possible.

However, this structure also has the following problems, and improvements have been desired.

That is, when the sealing member and the sliding member are combined, the sealing lip portion has not only the original sealing function but also the fitting function of the sealing member and the sliding member. Since the seal lip part is elastically deformed to pass over one of the radial edges of the radial part, the seal lip part may be damaged due to sliding contact with the radial edge, and its original shape may be damaged. There is a risk that the seal function, which is a function, may be impaired.

(Means for solving the problem) This invention is based on the above-mentioned sealing device.
The aim is to provide a product that has excellent workability and assemblability, and is extremely convenient to handle such as transportation and storage. A cross section consisting of a cylindrical part that tightly fits one of the members into the housing or the shaft, and a flange part that extends in the radial direction from the cylindrical part. It is formed into an L-shaped first annular member, and the other member includes a cylindrical part that fits tightly into the other of the housing or the shaft, and a lip-shaped tip extending from the cylindrical part toward the flange of the first annular member. a second annular member comprising an annular sealing portion made of an elastic material formed in the second annular member, and the lip-shaped portion of the second annular member is brought into elastic contact with the inner flat surface of the flange of the first annular member. The sealing device is provided with a sealing device of both annular members on the cylindrical portion side or the flange tip end side or both at a position where the cylindrical portion of the second annular member and the tip of the flange portion of the first annular member are opposed to each other. An elastic protrusion is formed which is elastically deformed in the radial direction by relative movement in the axial direction to fit and separate the annular members.

(Function) Relative movement of the two annular members in the axial direction toward the cylindrical portion side or the flange tip end side or both at the opposing position between the cylindrical portion of the second annular member and the tip of the flange portion of the first annular member. Since the elastic protrusions are formed to be elastically deformed in the radial direction by The protrusions are in a deformed and elastically fitted state, while when assembled to the housing and the shaft, both the protrusions are separated in the axial direction and are not in contact.

(Example) FIGS. 2 and 3 are diagrams showing an example of embodying this invention, in which a housing side member 10
, a core metal 10a and a mantle portion 10b made of an elastic material.
an outer cylindrical part 11 which is a member having an L-shaped cross section and is tightly fitted into the housing 1;
It is formed into an annular member consisting of a flange portion 12 extending radially inward from an end portion thereof.

Reference numeral 13 denotes a shaft-side member, in which a cylindrical core metal 13a is similarly embedded in an elastic material 13b, and an inner cylindrical portion 14 that tightly fits the shaft 3, and a space between the housing 1 and the shaft 3 from the cylindrical portion 14. It is formed by an annular sealing part 16 which extends inward and has a tip 15 formed into a lip shape and is elastically deformable in the axial direction, and when the respective members 10 and 13 are attached to the housing 1 and the shaft 3, The lip-shaped tip 15 slides into contact with the inner plane part 17 of the flange part 12 with appropriate contact pressure, and both members 10, 13
The configuration allows for relative rotation of.

The inner circumferential surface of the flange portion 12 and the outer circumferential surface of the shaft-side member cylindrical portion 14 opposing thereto, that is, both members 1
Protrusions 18 and 19 that are continuous in the circumferential direction are provided at the portions where 0 and 13 are closest in the radial direction, respectively,
In the state shown in the second figure before both members 10 and 13 are assembled to housing 1 and shaft 3, both protrusions 18,
19 are in a state where they are elastically deformed in the radial direction and are elastically fitted, and are in an assembled state (the third
In the case shown in FIG. 1, both the protrusions 18 and 19 are separated in the axial direction and are not in contact with each other. That is, both members 1
0 and 13 are moved relative to each other in the axial direction, both the protrusions 18 and 19 are elastically deformed in the radial direction to enter into a fitted state and then separated.

These protrusions 18, 19 may be provided on both members 10, 13, or may be provided on only one of them, in short, both members 10, 13.
The protrusions 18 and 19 may be continuous or discontinuous in the circumferential direction as long as they satisfy the above-mentioned conditions when the protrusions are moved in the axial direction.
Further, the positions where the protrusions 18 and 19 are provided do not necessarily have to be the parts where both the members 10 and 13 are closest to each other. In the state shown in FIG. 3, one ends of both members 10 and 13 in the fitted state are on the same plane. This is to facilitate the positioning of both members 10 and 13 when they are fitted, and when one end of both members 10 and 13 are on the same plane, it is easy to confirm that they are in the optimal fitted state. can.

In this way, the protrusion 18 of the flange 12 is connected to both members 10,
13 (FIG. 3), it is located between the protrusion 19 of the shaft side member 13 and the sealing portion 16.

The protrusions 18 and 19 each have an axial width of A,
When B and the axial width of the collar portion 12 are C,
(C-A)>A, A>B (fourth
(see figure), when the outer surface of the collar portion 12 and the outer end surface of the shaft-side member cylindrical portion 14 are located on the same plane,
Both protrusions 18 and 19 are separated so that they are not in contact with each other. Note that as shown in FIG. 4, the protrusions 18,
19 is in the fitted state due to the elastic deformation, the outer surface of the collar portion 12 and the shaft side member cylindrical portion 14
axial deviation width from the outer end surface (C-A in Figure 4)
By matching the appropriate amount of deflection in the fitted state of the sealing part 16 (FIG. 3), the contact pressure between the lip-shaped tip 15 and the inner plane part 17 of the flange part 12 in the fitted state can be reduced. It becomes easy to set appropriately.

Figures 5a, b, and c show the housing 1 and the shaft 3.
First, using jig D, both members 10 and 13, which are fitted by projections 18 and 19, are pushed into shaft 3 as shown by arrow E, and then When the tip of the member 10 faces the entrance of the housing 1, replace it with the jig F and push the housing side member 10 in the direction E.
Furthermore, the jig F comes into contact with both the members 10 and 13 to fit the members 10 and 13 into predetermined positions. At this time, during the transition from FIG. 5b to c, the shaft member 13
Due to the frictional resistance between the shaft 3 and the shaft 3, the movement of the shaft side member 13 is temporarily stopped, both the protrusions 18 and 19 shift from the fitted state to the detached state, and the jig F comes into contact with both the members 10 and 13. Press-fit both members 10 and 13 to a predetermined position.

(Effects of the invention) Since this invention has the above-described structure, each protrusion can be processed (molded) at the same time as the housing side member and the shaft side member, so the processing is extremely easy.

When temporarily assembling both parts, simply pushing in each of the protrusions allows both parts to be held in a fitted state and handled as one, making handling and combination extremely easy, and there is no risk of separation during transportation, etc. .

When assembling to the housing and shaft, the positions of both members can be determined appropriately by simply pushing them in, and the assembling is easy and the assembling accuracy is extremely high.

Since the protrusion for temporarily assembling the housing side member and the shaft side member is provided separately from the sealing part, the sealing part only guarantees the original sealing function.
There is no risk of damaging the sealing function during temporary assembly.

As described above, handling such as transportation and storage becomes extremely easy, and practical effects are improved.

[Brief explanation of the drawing]

Figure 1 is a vertical sectional view of the main part showing the conventional technology, Figure 2
3 are longitudinal sectional views of one embodiment of this invention, FIG. 4 is an explanatory view of the essential parts, and FIGS. 5 a, b, and c are longitudinal sectional views showing the order of assembly. DESCRIPTION OF SYMBOLS 1... Housing, 3... Shaft, 10... Housing side member (first annular member), 11... Outer cylindrical part, 12... Flange part, 13... Shaft side member (second annular member), 14 ...Inner cylindrical part, 15...Lip-shaped tip, 16...Sealing part, 17...Inner plane part, 1
8,19...Elastic protrusion.

Claims (1)

[Claims for Utility Model Registration] (1) It has two members: a housing-side member attached to the housing and a shaft-side member attached to the shaft, and one of the members is attached to either the housing or the shaft. Formed into a first annular member having an L-shaped cross section and consisting of a cylindrical part that fits tightly and a flange extending radially from the cylindrical part, the other member is a cylindrical part that fits tightly into the other of the housing or the shaft. and an annular sealing part made of an elastic material extending from the cylindrical part toward the flange part of the first annular member and having a lip-shaped tip. A sealing device configured by making the lip-shaped part elastically contact an inner plane part of the flange of the first annular member, wherein the cylindrical part of the second annular member and the tip of the flange of the first annular member are connected to each other. The cylindrical portion side and/or the flange tip end side at opposing positions are elastically deformed in the radial direction by the relative movement of the annular members in the axial direction, so that the annular members are fitted into each other and then removed. A sealing device characterized by forming an elastic protrusion. (2) The housing side member is formed into an annular member having an L-shaped cross section, which includes an outer cylindrical portion that fits tightly into the housing, and a flange portion that extends radially inward from the cylindrical portion, and the shaft side member: It is formed by an inner cylindrical part that tightly fits on the shaft, and an annular sealing part made of an elastic material that extends from the cylindrical part into the space and has a lip-shaped tip. ,
The elastic protrusion is configured to come into elastic contact with the inner flat surface of the flange of the housing side member, and the elastic protrusion is formed on the outer circumferential surface of the cylindrical portion of the shaft side member that radially opposes at least the inner circumferential surface of the flange of the housing side member. When the lip-shaped portion at the tip of the sealing portion is in sliding contact with the inner flat surface of the flange portion with appropriate contact pressure, the elastic protrusion is not in contact with the opposing portion; Claim (1) of the utility model registration, characterized in that an inner peripheral end of the flange part or a protrusion provided on the inner peripheral part is located between the sealing part and the sealing part. Sealing device. (3) The elastic protrusion is provided on both the inner peripheral surface of the flange of the housing side member and the outer peripheral surface of the circumferential portion of the shaft side member, and the elastic protrusion is provided on the outer surface of the flange and the outer end surface of the cylindrical portion of the shaft side member. When the housing side member and the shaft side member are moved relative to each other in the axial direction and are positioned in the same plane, the flange side elastic The axial width of the protrusion is A, the axial width of the elastic protrusion of the shaft side member is B, and the axial width of the collar is C, (C
- A) The sealing device according to claim (2) of the utility model registration, which is formed so that A>A and A>B. (4) When both elastic protrusions are in the fitted state, the width of the deviation in the axial direction between the outer surface of the flange of the housing side member and the outer end surface of the cylindrical portion of the shaft side member is determined by the lip-shaped portion of the sealing portion. The sealing device according to claim (3) of the utility model registration, which matches the optimum amount of deflection when slidingly contacts the inner flat surface of the flange.