JP5727899B2 - Washer - Google Patents

Description

  The present invention relates to a washer. More specifically, the present invention relates to a washer having a lubricating oil supply groove on a thrust surface (end surface) and suitable for use in, for example, a differential gear mechanism.

Conventionally, a differential gear mechanism of an automobile is well known, and the differential gear mechanism includes side gears in a casing, and a washer is disposed between an end surface of the side gears and the casing. The washer for the differential gear mechanism is made of an iron-based material and is formed into a thin annular shape, and slides forward and backward in the circumferential direction with respect to adjacent members while receiving a load in the thrust direction. It is supposed to be.
As shown in FIG. 8, a conventional washer for a differential gear mechanism has eight through holes for holding lubricating oil at a plurality of locations in the circumferential direction. In addition, as shown in FIG. 8, the washer for the differential gear mechanism has a rotational speed of several tens of rpm when sliding with the mating member, usually about 1000 rpm at the time of one-wheel idling. There was a drawback that it was difficult to form a sufficient oil film.
In addition, although it is not a washer for differential gear mechanisms, patent document 1-patent document 3 are well-known as a washer member which receives the load of a thrust direction, and the improvement of the thrust surface, for example.

Japanese Utility Model Publication No. 63-141323 JP 2005-098324 A JP 2002-349550 A

  By the way, as described above, the conventional washer for the differential gear mechanism has a plurality of through holes for retaining the lubricating oil, but it is difficult to form a sufficient oil film on the thrust surface. Therefore, conventionally, in order to improve the wear resistance and seizure resistance of the washer thrust surface, a process such as applying a special coating to the surface of the thrust surface has been required. For this reason, the conventional washer has a drawback that the cost of the surface processing treatment is increased, and as a result, the manufacturing cost is increased.

In view of the circumstances described above, the present invention is an annular washer having a thrust surface that slides with a counterpart material.
A lubricating oil supply groove for storing lubricating oil is formed in the thrust surface, and the lubricating oil supply groove has one end opened in the inner peripheral portion of the washer and the other end positioned in the radial center portion of the thrust surface. And an inner oil groove formed at a plurality of locations in the circumferential direction, one end opening in the outer periphery of the washer and the other end being located in the radial center portion of the thrust surface, and the inner oil groove Outer oil supply grooves formed alternately in the circumferential direction are provided.

According to the configuration described above, since the lubricating oil supply groove is formed on the thrust surface, the lubricating oil is stored in the lubricating oil supply groove, so that a sufficient oil film can be formed on the thrust surface. it can. And since the said lubricating oil supply groove | channel is formed in the said thrust surface, in order to improve sliding characteristics, such as abrasion resistance, it is not necessary to give a special coating process to a thrust surface.
Therefore, it is possible to provide a washer with good sliding performance while suppressing an increase in manufacturing cost.

The front view which shows one Example of this invention. The front view of the principal part from the II direction of FIG. The figure which shows the introduction direction of the lubricating oil with respect to the washer and lubricating oil supply groove | channel of FIG. The front view which shows 2nd Example of this invention. The front view which shows 3rd Example of this invention. The front view which shows 4th Example of this invention. The front view which shows 5th Example of this invention. The figure which shows the front view and related data of a washer of a prior art.

  1 to 3, the washer 1 is one of the components of a differential gear mechanism. The washer 1 includes an end face of a casing and an end face of a side gear (not shown). It is designed to be interposed between the two. When the differential gear mechanism is operated in a state where the washer 1 is interposed between the end face of the casing and the end face of the side gear, the side gear is rotated either forward or backward. At that time, the end face of the side gear and the thrust face 1A which is one end face of the washer 1 slide, and the washer 1 is also rotated relative to the forward and reverse directions in the circumferential direction. That is, when the differential gear mechanism is actuated, the washer 1 also rotates in the forward and reverse directions and slides with the counterpart material.

The washer 1 is made of an iron-based material and is formed into a thin annular shape as a whole. More specifically, the outer diameter of the washer 1 is set to about 50 to 100 mm, the inner diameter is set to about 30 to 80 mm, and the wall thickness is set to about 1.5 to 2.0 mm.
Thus, the washer 1 of the present embodiment is characterized in that the lubricating oil supply groove 2 is formed on both end surfaces which become the thrust surface 1A. That is, a plurality of inner oil supply grooves 3 are formed at an equal pitch in the circumferential direction on the inner peripheral portion 1B side of the thrust surface 1A, and at an equal pitch in the circumferential direction on the outer peripheral portion 1C side of the thrust surface 1A. Outer oil supply grooves 4 are formed alternately with the inner oil supply grooves 3. The plurality of inner oil supply grooves 3 and the outer oil supply grooves 4 constitute a lubricating oil supply groove 2.

Each inward oil supply groove 3 is formed at a 90 ° angle with respect to the storage portion 3A disposed in the radial central portion 1D of the thrust surface 1A, and to the inner side. It is comprised from the introduction part 3B which opened the edge part 3B 'to the inner peripheral part 1B. The introduction part 3B and the storage part 3A are arranged so as to be inclined at 45 ° in the opposite directions with respect to the radial direction of the thrust surface 1A.
On the other hand, each outer oil supply groove 4 is disposed in the central portion 1D in the radial direction of the thrust surface 1A and has a storage portion 4A inclined by 45 ° with respect to the radial direction, and an angle of 90 ° with respect to the storage portion 4A. It is formed at the same time, and is composed of an introduction portion 4B having an outer end portion 4B ′ opened to the outer peripheral portion 1C. The introduction part 4B and the storage part 4A are arranged at an angle of 90 °.
The inner oil supply grooves 3 and the outer oil supply grooves 4 are alternately formed in the circumferential direction, so that the storage portion 3A of the inner oil supply groove 3 and the storage portion 4A of the outer oil supply groove 4 are thrust surfaces. The central portion 1D in the radial direction of 1A is formed in substantially the same arrangement direction.
On the other hand, the introduction portion 3A of the inner oil supply groove 3 is formed in a direction in which lubricating oil is easily introduced from the end portion 3B ′ when a side gear and a shaft (not shown) of the differential gear mechanism are rotated to the right in FIG. Yes. In contrast, the introduction portion 4B of the outer oil supply groove 4 is formed in a direction in which lubricating oil is easily introduced from the end portion 4B ′ when the side gear and the shaft of the differential gear mechanism are rotated counterclockwise in FIG. ing.
In this way, the lubricating oil supply groove 2 formed on the thrust surface 1A of the washer 1 has a central portion of the thrust surface 1A even when the thrust surface 1A is slid and rotated in either the forward or reverse direction. The lubricating oil can be reliably stored in the storage portion 3A of the inner oil supply groove 3 or the storage portion 4A of the outer oil supply groove 4 in 1D.
In this embodiment, the range in which the inner oil supply groove 3 and the outer oil supply groove 4 overlap in the radial direction is 10% of the radial range from the inner peripheral portion 1B to the outer peripheral portion 1C on the thrust surface 1A. ~ 80%.
As shown in FIG. 2, the inner oil groove 3 has a V-shaped cross section with a shallow bottom, and the width W of the inner oil groove 3 is set to about 0.5 to 3 mm. The depth d is set to about 0.1 to 1 mm. Further, the cross-sectional shape, width, and depth of the outer oil supply groove 4 are the same as those of the inner oil supply groove. Further, as described above, the washer 1 is made of an iron-based material, but a coating such as a coating material is not applied to the surface of the thrust surface 1A.

In the washer 1 of the present embodiment configured as described above, since the lubricating oil supply groove 2 described above is formed on the thrust surface 1A, the thrust surface 1A slides and rotates in either the forward or reverse direction. Even in this case, the lubricating oil can be reliably stored in the storage portion 3A of the inner oil supply groove 3 or the storage portion 4A of the outer oil supply groove 4 in the central portion 1D of the thrust surface 1A. Thereby, a sufficient amount of lubricating oil can be held on the thrust surface 1A of the washer 1, and therefore an oil film of the lubricating oil can be formed over the entire thrust surface 1A.
Therefore, in this embodiment, the washer 1 can be manufactured from an inexpensive iron-based material, and the wear resistance and seizure resistance can be improved by the lubricating oil supply groove 2 formed on the thrust surface 1A. it can.

Next, FIG. 4 shows the washer 1 of the second embodiment of the present invention. In the first embodiment described above, the storage portion 3A and the introduction portion 3B of the inner oil supply groove 3 are arranged to make a right angle, and the storage portion 4A and the introduction portion 4B of the outer oil supply groove 4 are made a right angle. However, in this second embodiment, the angle formed by the reservoir 3A of the inner oil groove 3 and the introduction portion 3B is an acute angle (about 60 °), and the reservoir of the outer oil groove 4 The angle formed by 4A and the introduction portion 4B is also an acute angle (about 60 °). Other configurations are the same as those of the first embodiment. In the second embodiment, the same reference numerals are assigned to the members corresponding to those of the first embodiment.
Even in the second embodiment, it is possible to obtain the same operation and effect as the first embodiment described above.

Next, FIG. 5 shows a washer 1 according to a third embodiment of the present invention. In the first embodiment described above, the storage portion 3A and the introduction portion 3B of the inner oil supply groove 3 are arranged to make a right angle, and the storage portion 4A and the introduction portion 4B of the outer oil supply groove 4 are made to make a right angle. In this third embodiment, the angle formed by the reservoir portion 3A of the inner oil supply groove 3 and the introduction portion 3B is an obtuse angle (about 120 °), and the reservoir portion of the outer oil groove 4 The angle formed by 4A and the introduction portion 4B is also an obtuse angle (about 120 °). With this configuration, the storage portion 3 </ b> A of the inner oil supply groove 3 and the storage portion 4 </ b> A of the outer oil supply groove 4 are arranged in the same direction as the radial direction of the washer 1. Other configurations are the same as those of the first embodiment. In the third embodiment, the same reference numerals are assigned to the members corresponding to those of the first embodiment.
Even in the third embodiment, it is possible to obtain the same operations and effects as the above-described embodiments.

Next, FIG. 6 shows a washer 101 according to a fourth embodiment of the present invention. In this fourth embodiment, each inner oil supply groove 103 and each outer oil supply groove 104 are arranged in the radial direction of the washer 101. And a straight groove in the same direction. In the fourth embodiment, a member number obtained by adding 100 to each member corresponding to the first embodiment is assigned.
Even in the fourth embodiment having such a configuration, the same operations and effects as those of the above-described embodiments can be obtained.

Next, FIG. 7 shows a washer 201 according to a fifth embodiment of the present invention. In short, this fifth embodiment is different from the inner oil supply grooves 103 and outer portions of the fourth embodiment. The oil supply groove 104 is disposed so as to be inclined by about 45 ° with respect to the radial direction of the washer 101. The other configuration is the same as that of the fourth embodiment. In the fifth embodiment of FIG. 7, member numbers obtained by adding 100 to the members corresponding to the fourth embodiment are given.
Even in the fifth embodiment having such a configuration, it is possible to obtain the same operations and effects as the above-described embodiments.

In addition, although each Example mentioned above demonstrated the case where the lubricating oil supply groove | channel 2 mentioned above was provided in each thrust surface 1A (end surface) in the washer 1, 101, 201, the washer 1, 101, 201 was demonstrated. The lubricating oil supply groove 2 may be provided on only one of the end faces.
Further, in order to improve the sliding characteristics of the washers 1, 101, 201, the thrust surfaces 1A, 101A, 102A may be coated with a required material.
Moreover, in the said Example, although the inner oil groove 3 and the outer oil groove 4 are alternately arrange | positioned 1 each in the circumferential direction, the inner oil groove 3 and the outer oil groove 4 are arranged in the circumferential direction. 2 may be alternately arranged, or two inner oil supply grooves 3 may be arranged adjacent to each other, and one outer oil supply groove 4 may be arranged next to each other. .
In addition, the cross-sectional shape of the inner oil supply groove 3 and the outer oil supply groove 4 is a cross section in which the vertex of the V shape is shifted in the groove width direction in addition to a rectangular shape, an arc shape, a rectangular shape with an R at the corner, etc. A triangular shape or a shape in which the central portion of the groove bottom is shallow may be used.
In each of the above embodiments, the end groove shape of the reservoir portion 3A of the inner oil groove 3 and the reservoir portion 4A of the outer oil groove 4 is rectangular, but it is triangular, arcuate, or rounded at the corner. It may be a rectangular shape.
Further, each of the embodiments described above describes the case where the present invention is applied to a washer for a differential gear mechanism. However, the present invention can be applied not only to a differential gear mechanism but also to other thrust washers. Of course.

DESCRIPTION OF SYMBOLS 1 ... Washer 1A ... Thrust surface 1B ... Inner peripheral part 1B ... Outer peripheral part 1D ... Central part 2 ... Lubricant supply groove 3 ... Inner oil supply groove 4 ... Outer oil supply groove

Claims (6)

An annular washer body,
A thrust surface that is formed in the washer body and slides against the mating member;
A lubricating oil supply groove formed on the thrust surface for storing lubricating oil ;
Have
Before Symbol lubricating oil supply groove,
An inner oil supply groove formed in a plurality of locations other end located in the central portion of the radiation direction of said thrust surface, and in the circumferential direction with one end opening to the inner peripheral portion of the washer body,
An outer oil groove having one end and the other end with an opening in the outer peripheral portion of the washer body is positioned in the central portion of the radiation direction of said thrust surface, and are formed alternately in the previous SL inward oil supply groove in the circumferential direction
Have
The washer characterized in that the inner oil supply groove and the outer oil supply groove are arranged so as to overlap in the circumferential direction at a central portion of the thrust surface . Reservoir before Symbol respective inner oil supply groove, the end portions of the inner side is formed an introduction portion which opens into the inner peripheral portion, the central portion of the thrust surface at an predetermined angle with respect to the inlet portion Department and
Before SL Each outer oil supply groove has a inlet section end of the outer side is opened to the outer peripheral portion, and a reservoir formed in the central portion of the thrust surface at an predetermined angle with respect to the inlet portion The washer according to claim 1, wherein the washer is provided. Before Symbol thrust surface is adapted to be slidably rotated in the forward and reverse both against the mating member,
Before SL inlet portion of the introduction portion and Kakusoto side oil groove of each inner oil supply groove, the claims either one thereof is open in the normal rotation direction, characterized in that the other is opened in the opposite rotational direction 2. The washer according to 2. Before SL Each inner oil supply groove is made linear grooves radial in the same direction of the thrust surface,
Before SL Each outer oil supply groove, the washer according to claim 1, characterized in that it consists of linear grooves radial in the same direction of the thrust surface. Before SL Each inner oil supply groove is made linear grooves is inclined with respect to the radial direction of the thrust surface,
Before SL Each outer oil supply groove, the differential gear mechanism according to claim 1, characterized in that comprising the above-mentioned inward oil supply groove and a linear groove is inclined in the same manner with respect to the radial direction of the thrust surface Washer. Before SL Each inner oil groove and Kakusoto side oil supply groove, the washer according to any one of claims 1 to 5, characterized in that it is formed on both thrust surface of the washer.

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