JP2000000774A - Wrench for oil filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform mounting and demounting of a plurality of oil filters, different in an outside diameter from each other, by a single wrench for a oil filter. SOLUTION: A rotation driven part 12 is mounted on the outer surface of a rotary disc 11 and two fastening members 21 and 22 are mounted on the inner surface of the rotary disc 11. The fastening members 21 and 22 are provided with arm parts 23a and 23b, rotatably attached to the rotary disc 11 and arcuate parts 24a and 24b, respectively, arranged thereat. A spring force in a direction in which the fastening members are caused to approach each other is energized on the fastening members 21 and 22 through compression coil springs mounted on the arm parts 23a and 23b. Through rotational drive of the rotary disc 11 with the arcuate parts 24a and 24b brought into contact with a filter case 35, the filter case 35 is rotated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil filter wrench for rotating an oil filter cartridge of an automobile when the cartridge is attached or detached.

[0002]

2. Description of the Related Art As an oil filter used for filtering engine oil of an automobile, a throw-away type in which a filter element is incorporated in a filter case is mainly used, and the filter case is screwed to an engine. It has become so.

When the oil filter is replaced by a maintenance shop, a user, or the like, the filter case is rotated and removed, and in this case, a special wrench for the oil filter is used. Similarly, when attaching a new filter case, the wrench is used. As a wrench for an oil filter used in such an application, for example, there is a type shown in Japanese Patent Application Laid-Open No. 9-225848.

[0004]

This wrench has a dish-shaped tool body fitted so as to cover the tip of the filter case, and the tool body has a driving tool for rotating the tool body. Tools are installed. However,
When a dish-shaped tool body shaped to cover the tip of the filter case is used, one wrench only attaches and detaches one type of filter case with the same outer diameter, that is, attaches and detaches the filter case. Can not do.

There are various sizes of oil filters used in automobiles depending on the type of vehicle, engine displacement, and the like.
With many types of wrenches, such as a maintenance shop, it is necessary to prepare a plurality of wrenches according to the size of an oil filter to be used.

An object of the present invention is to enable a single oil filter wrench to attach and detach a plurality of oil filters having different outer diameters.

[0007]

According to the present invention, there is provided an oil filter wrench comprising: a rotary disk having a rotary drive unit mounted on one surface; A first arm member attached to the first arm portion, a first clamping member provided on the first arm portion and having a first arc-shaped portion in contact with the outer peripheral surface of the filter case; A second arm portion rotatably mounted at a remote position, and a second arc-shaped portion provided on the second arm portion and in contact with the outer peripheral surface of the filter case.
A fastening member, and a spring member for urging a spring force in a direction to bring the first fastening member and the second fastening member closer to each other, and the respective arc-shaped portions are brought into contact with the filter case. The filter case is rotated by rotating the rotary disk in the state. The center of rotation of each of the arms may be movable.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a perspective view showing an oil filter wrench according to an embodiment of the present invention, FIG. 2 is a plan view of FIG. 1, and FIG. 3 is a cross section taken along line III-III in FIG. FIG. 4 is a perspective view showing the outer surface of the oil filter wrench.

This oil filter wrench has a rotating disk 11, and a rotating drive unit 12 having a hexagonal outer peripheral surface is attached to one surface, that is, the outer surface, by means such as welding. As the rotation drive unit 12,
A nut may be used. This rotating disk 1
Although 1 is made of metal, resin or the like may be used. When the rotary disk 11 is manufactured by forging or casting, the rotary drive unit 12 can be integrated.

Two mounting holes 13 and 14 are provided at positions separated by a distance R from the rotation center O of the rotating disk 11, respectively.
These mounting holes 13 and 14 are shifted by 180 degrees in the rotation direction about the rotation center O.

On the other surface, that is, the inner surface of the rotating disk 11, two fastening members, a first fastening member 21 and a second fastening member 22, are rotatably mounted.
The first fastening member 21 includes a first arm portion 23a extending along the inner surface of the rotating disk 11, and a first arm portion 2a.
3a and a first arc-shaped portion 24a integral with the outer peripheral surface of the filter case.

The second fastening member 22 has the same shape as the first fastening member 21 and has a second arm portion 23b.
And a second arc-shaped portion 24b integrated therewith. Each of the fastening members 21 and 22 may be manufactured by bending a metal plate material cut into the same shape by a press, or may be manufactured by casting or forging. When a resin is used, injection molding is used. For example, it may be manufactured by such means.

In order to attach the respective arm portions 23a and 23b to the rotating disk 11 at their respective base ends,
A pin 25 is used, and the pin 25 is
1 has a large-diameter head 26 that comes into contact with the outer surface, a main body 27 that penetrates the mounting hole, and a caulked portion 28 that is fixed to each of the arms 23a and 23b. The outer diameter d of the main body 27 of the pin 25 is set smaller than the inner diameter D of the mounting holes 13 and 14, and the respective arms 23a and 23
b rotates around the pin 25 at the base end and is movable along the rotating disk 11 within the range of the gap between the outer surface of the main body 27 and the inner surfaces of the mounting holes 13 and 14. Has become. That is, it moves with a stroke of D-d.

Each of the arc-shaped portions 24a and 24b is tapered in the axial direction so that the tip portion expands outward in the radial direction. Both ends in the circumferential direction are larger than the radius of curvature of the central portion. Are also formed with meshing portions 31a, 32a, 31b, 32b bent with a small radius of curvature. A member having a large coefficient of friction made of rubber or the like may be attached to each meshing portion, or rubber or the like may be attached to the entire inner peripheral surfaces of the arc-shaped portions 24a and 24b.

A tension coil spring 34 is attached to the hooks 33a, 33b fixed to the tips of the arms 23a, 23b, and these spring members 34 attach these to the two fastening members 21, 22. A spring force is urged in a direction approaching each other.

Therefore, each fastening member 2
When not in use, the pins 25 are pivoted counterclockwise in FIG. 2 around the pin 25 and approach the closest, and the pin 25 contacts one of the inner surfaces of the mounting holes 13 and 14. Will do. Each arm 23
By setting the widths of a and 23b, the arms 23a and 23b may be brought into contact with each other when they approach each other. By providing a stopper on the inner surface of the rotating disk 11, the closest position is regulated. You may do it.
1 to 3, the pin 25 is located at the center of each of the mounting holes 13 and 14 for convenience of drawing, and the respective fastening members 21 and 22 are separated by a predetermined distance against the spring force. It is shown.

When an oil filter attached to an automobile engine is removed or attached using the oil filter wrench shown in FIGS. 1 to 3, the distance between the fastening members 21 and 22 is limited to that of the filter case. The respective tightening members 21 and 22 are spread so as to be larger than the outer diameter against the spring force of the spring member 34. In this state, the arc-shaped portions 24a and 24b of the fastening members 21 and 22 are brought into contact with the outer peripheral surface of the distal end portion of the filter case.

FIG. 5 shows the fastening members 21,
22 shows a state where the 22 arc-shaped portions 24a and 24b are in contact with the outer peripheral surface of the distal end portion of the filter case 35. In this state, each of the arm portions 23a and 23b is rotatable about its base end, and the rotation center position of the base is movable. The meshing portions 31a, 32a, 31b, 32b at both ends in the circumferential direction of the respective arc-shaped portions 24a, 24b surely adhere to the uneven portions 36 of the filter case 35.

In this state, when the rotary disk 11 is rotated by attaching a tool such as a wrench to the rotary drive unit 12, the rotational force is transmitted to the filter case 35 via the fastening members 21 and 22, and The case 35 can be rotated.

As shown in FIG. 4, as a tool to be attached to the rotary drive unit 12, if a square or hexagonal fitting hole 37 is formed in the rotary drive unit 12 having a hexagonal outer peripheral surface, the fitting can be performed. A tool that fits into or fits into the mating hole 37 can be used. When the rotation drive unit 12 is a nut, a tool that can be screw-coupled to the screw hole of the nut can be used. Further, the rotation drive unit 12
The bar is attached as a tool for rotation by using a pin, and the bar is held in a hand.
1 may be rotated.

The present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the scope of the invention.

For example, in the case shown, each of the fastening members 21 and 22 has an arm portion and an arc-shaped portion integrated with each other, but by connecting the arc-shaped portion to the arm portion with a pin, The arc-shaped portion may be rotated at the tip of the arm portion.

[0024]

According to the present invention, since the two fastening members attached to the rotary disk are rotatable about the rotary disk, a plurality of types of oil filters having different outer diameters can be combined into one oil filter. The oil filter can be attached and detached by rotating with a filter wrench.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an oil filter wrench according to an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a perspective view showing an outer surface of the rotating disk.

FIG. 5 is a sectional view showing a state where an oil filter wrench is attached to the oil filter.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Rotation disk 12 Rotation drive part 13, 14 Mounting hole 21 Tightening member 22 Tightening member 23a, 23b Arm part 24a, 24b Arc-shaped part 25 Pin 26 Large diameter head 27 Main body part 28 Caulking part 31a, 31b, 32a, 32b Meshing Part 33a, 33b Hook 34 Tension coil spring (spring member) 35 Filter case 36 Uneven part

Claims (2)

[Claims] 1. A rotating disk having a rotation drive unit mounted on one surface, a first arm unit rotatably mounted on the rotation disk at a position distant from a rotation center position on the other surface, and the first arm unit A first fastening member provided on the arm portion and having a first arc-shaped portion in contact with the outer peripheral surface of the filter case; and a second fastening member rotatably attached to the rotating disk at a position away from a rotation center position on the other surface. An arm portion, a second tightening member provided on the second arm portion and having a second arc-shaped portion in contact with an outer peripheral surface of the filter case, and the first tightening member and the second tightening member approach each other. And a spring member for urging a spring force in a direction in which the rotating disk is rotated while the respective arc-shaped portions are in contact with the filter case. More wrench oil filter, characterized in that so as to rotate the filter case. 2. The wrench for an oil filter according to claim 1, wherein the center of rotation of each of said arm portions is movable.