JPH10324108A - Bearing locknut and washer structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bearing locknut and washer structure capable of being easily and surely assembled without a process of screwing or cutting female threads. SOLUTION: Four washer engaging portions 3 shaped like a groove are formed in the outer peripheral edge of a locknut 1. The washer engaging portion 3 has a tapered engaging surface 3A on which an engaging member 4 formed on the outer peripheral edge of a lock washer 2 is pressed. Turning preventing projections 5 are formed in the inner peripheral edge of the lock washer 2 and regulate the turning of the lock washer 2 when they are fitted in key grooves made in both knuckle portions of a vehicle. This constitution can integrally hold the locknut 1 only by engaging the lock washer 2 with the locknut 1 and can prevent the locknut 1 from turning only by fitting the engaging member 4 in the washer engaging portion 3. This can make an assembling work easy.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing lock nut / washer structure.

[0002]

2. Description of the Related Art Conventionally, for example, after a lock nut as a locking device for a bearing interposed between a wheel side and an axle side or a vehicle body side is tightened, a lock washer whose rotation is restricted at the time of mounting is locked. There is known a bearing lock nut / washer structure integrated with a nut by screwing.

[0003]

However, in the conventional bearing lock nut / washer structure, after the lock nut is tightened, the lock nut may be screwed back to match the screw hole of the lock washer. Had the problem that it required skill. Also,
In order to integrate the lock washer with the lock nut,
For example, four screws are required for a set of lock nut and lock washer, the screw fixing process is complicated, and the lock nut side also requires four female screw processing steps, which increases the number of steps. There was a point.

Accordingly, an object of the present invention is to provide a bearing lock nut / washer structure that can be easily and reliably assembled without requiring a screwing step or a female screw processing step.

[0005]

According to the first aspect of the present invention,
In a bearing lock nut / washer structure in which a lock nut screwed into a shaft portion to fasten and fix a bearing is restricted by a lock washer that is engaged with the shaft portion in a rotational direction, a plurality of washer engaging portions are provided on the lock nut. Are formed at predetermined intervals in the circumferential direction, at least one engaging piece is formed on the lock washer, and the engaging piece engages with any of the plurality of washer engaging portions to perform the rotation restriction. It is characterized by.

Accordingly, since the lock nut and the lock washer can be integrally held by being engaged with the washer engaging portion and the engaging piece, there is no need to fix the screw, and the assembling work is facilitated. Can be.

According to a second aspect of the present invention, there is provided the bearing lock nut / washer structure according to the first aspect, wherein a washer engaging portion of the lock nut is circumferentially engageable with an outer peripheral portion of the lock nut. And the washer engaging portion is formed with a washer engaging surface that is inclined downward from the surface where the lock nut and the lock washer are joined toward the other surface, and the engaging piece is The lock washer is formed in a claw shape on an outer peripheral portion, and the engagement piece engages with the washer engagement portion in the axial direction and the circumferential direction to perform the rotation control of the lock nut.

Therefore, the lock nut and the lock washer are integrally held by engaging the engaging piece with the washer engaging portion, and the rotation of the lock nut can be restricted, so that the assembling can be performed reliably and easily. Can be done.

According to a third aspect of the present invention, there is provided the bearing lock nut / washer structure according to the second aspect, wherein the washer engaging portion also serves as a groove for inserting a tool for tightening the lock nut. .

Therefore, it is not necessary to separately form a hole for inserting a tightening tool in the lock nut, and by ascertaining the position of the washer engaging portion, it is possible to easily ascertain the mounting position with the lock washer. There are advantages.

According to a fourth aspect of the present invention, there is provided the bearing lock nut / washer structure according to the first aspect, wherein the lock washer has the claw-shaped engagement piece formed on an outer peripheral portion thereof, and the lock nut has An engagement projection is formed on a surface to be joined, and the lock nut is a washer engagement surface that is inclined downward from the surface where the lock nut and the lock washer are joined to the other surface over the entire outer peripheral portion. Are formed, and an engagement hole into which the engagement protrusion enters is formed on a surface to be joined to the lock washer.

Therefore, the lock nut can be prevented from rotating by engaging the engagement protrusion of the lock washer with the engagement opening of the lock nut. Further, by engaging the engaging piece with the washer engaging surface, the lock nut and the lock washer can be integrally held, and the assembling work can be facilitated.

According to a fifth aspect of the present invention, there is provided the bearing lock nut / washer structure according to the fourth aspect, wherein the engagement port is formed in a plurality and serves also as a hole for inserting a tool for tightening the lock nut. Features.

[0014]

According to the first aspect of the present invention, the step of forming a female screw in the lock nut and the step of fixing the lock washer with screws are not required, and the assembling work can be facilitated. In the invention described in Item 2, the lock nut and the lock washer are integrally held by the engagement piece engaging the washer engagement portion,
Since the rotation of the lock nut can be restricted, there is an effect that the assembling is made sure and easy.

According to the third aspect of the present invention, it is not necessary to form a hole for inserting a tightening tool, and by grasping the position of the washer engaging portion, it is possible to easily grasp the position of attachment with the lock washer. effective.

According to the fourth aspect of the invention, the lock nut can be prevented from rotating by engaging the engagement protrusion of the lock washer with the engagement opening of the lock nut. In addition, by engaging the engaging piece with the washer engaging surface, the lock nut and the lock washer can be integrally held, which has an effect of facilitating the assembling work.

According to the fifth aspect of the present invention, there is no need to separately form a hole for inserting a tightening tool in the lock nut, and the lock nut and the number of manufacturing steps can be reduced.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of a bearing lock nut / washer structure according to the present invention will be described below with reference to the drawings.

(Embodiment 1) FIGS. 1 to 3 show a bearing lock nut and washer structure according to Embodiment 1 of the present invention.
Is shown. In the present embodiment, for example, the present invention is applied to a structure in which a bearing is mounted between a knuckle spindle side and a hub side of a drive shaft on a front wheel side of an FF vehicle (front engine front drive vehicle). . In the drawing, reference numeral 1 denotes a lock nut, and 2 denotes a lock washer. As shown in FIG. 1, the lock nut 1 has four washer engaging portions 3 formed in a groove shape on an outer peripheral portion at equal intervals. This washer engaging portion 3
Is a tapered engagement surface 3 which is inclined downward from the surface where the lock nut 1 and the lock washer 3 are joined to the other surface.
A. In addition, on the inner peripheral surface of the lock nut 1,
A female screw 1A that is screwed to a male screw 6a formed on the outer peripheral surface of the knuckle spindle 6 side end, which is the shaft portion on which the bearing is mounted, is formed.

The lock washer 2 is, as shown in FIG.
The lock nut 1 has a planar shape that is substantially the same annular shape as the lock nut 1, and an engagement piece 4 that engages with the engagement surface 3 </ b> A of the washer engagement portion 3 of the lock nut 1 is formed at two locations on the outer periphery thereof. .
A guide portion 4 </ b> A bent toward the outside of the lock washer 2 is formed at an end edge of the engagement piece 4. In the inner peripheral portion of the lock washer 2, a detent is fitted into a rotation regulating groove 6b formed in an axial direction on an outer peripheral surface of a knuckle spindle 6 side end which is a shaft at a position corresponding to the engagement piece 4. The projection 5 is formed.

In this embodiment, as shown in FIG. 2, an engaging piece 4 of the lock washer 2 is engaged with a washer engaging portion 3 of the lock nut 1, and the engaging piece 4 is engaged with the washer. The lock nut 1 and the lock washer 2 are relatively unable to rotate by entering the concave portion of the joint 3. FIG. 3 shows a state where the lock nut 1 and the lock washer 2 are attached to a knuckle spindle 6 through which the drive shaft S passes. As shown in the figure, a bearing 8 is interposed between the side end of the hollow knuckle spindle 6 and the hub 7, and the inner race 8 </ b> A of the bearing 8 fixed to the side end of the knuckle spindle 6 is formed. The lock nut 1 is tightened so as to come into contact with the outer surface of the vehicle body. A lock washer 2 is mounted on the outer surface of the lock nut 1 so as to abut. The rotation preventing projection 5 of the lock washer 2 is fitted into a rotation restricting groove 6 b formed in the outer peripheral surface of the knuckle spindle 6 in the axial direction, and the engaging piece 4 is engaged with the washer engaging portion 3 of the lock nut 1. ing.

In this embodiment, since the bearing lock nut and washer structure is used, the lock nut 1 and the lock washer 2 do not need to be screwed, and the mounting process is facilitated. Also, lock nut 1
Of the lock nut 1 and the lock washer 2 both in the axial direction and in the circumferential direction because the washer engaging portion 3 is formed on the outer peripheral portion. , The structure is simple. Further, since the engagement piece 4 of the lock washer 2 is attached to the washer engagement portion 3 of the lock nut 1 so as to come into contact with the engagement surface 3A formed in a tapered shape, the lock washer 2 is attached to the lock nut 1. There is a function to prevent it from coming off. The guide portion 4A at the edge of the engagement piece 4 of the lock washer 2 is
Has a guide function of making it easy to get over the front part of the washer engaging portion 3 and to easily engage the washer engaging portion 3, and has an effect of facilitating the mounting work. Furthermore, the washer engaging portion 3 of the lock nut 1 can be used as a groove for inserting a tool when the lock nut 1 is tightened.

(Embodiment 2) FIGS. 4 and 5 show Embodiment 2 of the present invention. FIG. 4 is a perspective view showing the lock nut 11 and the lock washer 12 that constitute the bearing lock nut / washer structure of the present embodiment. FIG. 5 is a sectional view of a main part showing a state where the lock nut 11 and the lock washer 12 are assembled.

The lock nut 11 of the present embodiment has an annular shape, a female screw 11A is formed on the inner peripheral surface, and four engagement holes 13 are formed at regular intervals on a surface with which the lock washer 12 contacts. . This engagement opening 13 is also used as a hole for inserting a fastening tool. In addition, lock nut 11
As shown in FIG. 5, a tapered engagement surface 11B that is inclined downward from the surface with which the lock washer 12 abuts toward the other surface is formed around the outer peripheral surface.

As shown in FIG. 4, the lock washer 12 has four engaging pieces 14 formed on the outer periphery.
A guide portion 14 </ b> A bent outward is formed at an end edge of the engagement piece 14. Further, the lock washer 12 has an engagement protrusion 15 protruding toward the lock nut 11 so as to enter the engagement opening 13 of the lock nut 11 so that the lock nut 11 and the lock washer 12 cannot be relatively rotated. Is cut and bent. In addition, this engagement protrusion 15 is formed in one place. further,
On the inner peripheral portion of the lock washer 12, a detent protrusion 16 is provided at a position corresponding to a pair of opposed engaging pieces 14, in a rotation restricting groove 6 b formed on an outer peripheral surface of the knuckle spindle 6 side end portion in an axial direction. Are formed.

In the present embodiment, similarly to Embodiment 1 described above, the lock nut 11 is tightened from the outer surface of the vehicle body of the bearing attached to the knuckle, and the position of the engagement port 13 is adjusted to an appropriate position. Then, the rotation preventing projection 16 of the lock washer 12 is fitted into the rotation restricting groove 6a formed in the knuckle spindle 6, and the lock nut 11 is rotated.
The engagement projection 15 of the lock washer 12 is fitted into the engagement opening 13 of the lock. With such an assembly structure, the rotation of the lock nut 11 is restricted, and the bearing can be securely fixed.

Therefore, in the present embodiment, the same operation and effect as in the first embodiment can be obtained. Also, lock nut 1
Since the engagement of the lock washer 12 in the axial direction and the engagement in the circumferential direction of the lock washer are performed at different positions, more reliable engagement can be performed.

Although the first and second embodiments have been described above, the present invention is not limited to these, and various design changes accompanying the gist of the configuration are possible. For example, in the first embodiment, the lock washer 2 is 2
Although the configuration includes the four engagement pieces 4, it is needless to say that the configuration may include four engagement pieces 4 in the same number as the number of the washer engagement portions 3 of the lock nut 1. In the second embodiment,
Although the lock washer 12 is provided with one engagement protrusion 15, the lock washer 12 may be provided with a plurality of engagement protrusions 15. Furthermore, although the engagement projection 15 is formed by bending, the projection is not limited to this as long as it is a projection that is substantially fitted into the engagement opening 13 of the lock nut 11.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is an essential part cross-sectional view showing an engaged state between a lock washer 2 and a lock nut 1 in the first embodiment.

FIG. 3 is a sectional view showing a structure to which the first embodiment is applied;

FIG. 4 is a perspective view showing a second embodiment of the present invention.

FIG. 5 is an essential part cross-sectional view showing an engagement state between a lock washer 12 and a lock nut 11 according to the second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lock nut 2 Lock washer 3 Washer engagement part 4 Engagement piece 5 Detent projection 6 Knuckle 7 Hub 8 Bearing 11 Lock nut 12 Lock washer 13 Engagement opening 14 Engagement piece 15 Engagement projection

Claims (5)

[Claims] 1. A bearing lock nut / washer structure in which a lock nut screwed into a shaft portion to fasten and fix a bearing is restricted by a lock washer engaged with the shaft portion in a rotational direction. At least one engaging piece is formed on the lock washer, and the engaging piece is engaged with any of the plurality of washer engaging parts. A bearing lock nut and washer structure that regulates rotation. 2. The bearing lock nut / washer structure according to claim 1, wherein a washer engaging portion of the lock nut is formed in a groove shape which can be circumferentially engaged with an outer peripheral portion of the lock nut. The washer engaging portion is formed with a washer engaging surface that is inclined downward from the surface where the lock nut and the lock washer are joined toward the other surface, and the engaging piece is an outer peripheral portion of the lock washer. A lock lock nut / washer structure, wherein the engagement piece is axially and circumferentially engaged with the washer engaging portion to regulate the rotation of the lock nut. 3. The bearing lock nut / washer structure according to claim 2, wherein the washer engaging portion also serves as a groove for inserting a tool for tightening the lock nut. . 4. The bearing lock nut and washer structure according to claim 1, wherein said lock washer has said claw-shaped engagement piece formed on an outer peripheral portion thereof, and engages with a surface to be joined to said lock nut. A protrusion is formed, and the lock nut is formed with a washer engaging surface that is inclined downward from the surface where the lock nut and the lock washer are joined toward the other surface over the entire outer peripheral portion, and A bearing lock nut / washer structure, characterized in that an engagement opening into which the engagement protrusion enters is formed on a surface joined with the lock washer. 5. The bearing lock nut / washer structure according to claim 4, wherein the engagement port is formed in a plurality and serves also as a hole for inserting a tool for fastening the lock nut.・ Washer structure.