JP2003231457A - Tire changing means and jack turning attachment for it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tire changing means capable of easily carrying out fastening and loosening operations of a wheel nut required for changing a tire, and raising and lowering a manual jack without needing a large storage space, and to provide a jack turning attachment for it. <P>SOLUTION: This invention is characterized by providing: a portable electric wrench provided with an output shaft drivable rotatably forward and backward; the jack turning attachment having a rod-like form, having a jack engagement part formed at one end for raising and lowering the manual jack by detachably engaging with a manual jack raising/lowering moved joint to turn the moved joint, and having an output shaft mounting part formed at the other end and turned by the output shaft of the electric wrench by detachably engaging with the output shaft; and a wheel nut turning attachment having a short shaft-like form, having a nut engagement part formed at one end for turning a tire fixing wheel nut by engaging with the nut, and having an output shaft mounting part formed at the other end and turned by the output shaft of the electric wrench by engaging with the output shaft. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire changing tool for an automobile used when a tire is punctured, for example.
And a jack rotation attachment therefor.

[0002]

[Prior art]

[Patent Document 1] JP-A-60-102400

[Patent Document 2] Japanese Utility Model Publication No. 3-40076

When tires of an automobile are flat (or chained to the tires, normal tires and winter tires are replaced, tires are rotated), etc., when the tires are replaced, the wheel nuts of the tires are loosened by a wheel wrench and mounted on the vehicle. It is usual to replace the tire by lifting a vehicle body by rotating a manual jack (generally a pantograph type jack) with a crank handle and raising it.

However, since a considerable amount of force is required to rotate the crank handle during lifting and loosen the nut that has been tightly tightened, it is a difficult task for a weak person. Therefore, an electric jack as shown in Patent Document 1 and an impact wrench as shown in Patent Document 2 have been proposed.

[0005]

An electric jack and an impact wrench (electric wrench) are required to easily replace tires by using power. However, an automobile has a limited loading space, and if both of them are installed, a considerable dedicated storage space is required.

[0006] An object of the present invention is to provide a tire exchanging tool for tightening and loosening a wheel nut required for exchanging a tire and lifting and lowering a manual jack easily, and a tire exchanging tool and a jack therefor. It is to provide an attachment for rotation.

[0007]

Means for Solving the Problems and Effects of the Invention In order to solve the above problems, the present invention has a portable electric wrench provided with an output shaft capable of forward and reverse rotation drive, and a rod-shaped form.
A jack engaging portion is formed at one end thereof to detachably engage a driven joint for raising and lowering the manual jack to rotate the driven joint to raise and lower the manual jack,
A jack rotating attachment having an output shaft mounting portion that is detachably engaged with the output shaft of the electric wrench and rotated by the output shaft at the other end, and has a short shaft shape, and one end thereof. A nut engaging portion that engages with a tire fixing wheel nut to rotate the nut is formed in the portion,
A wheel nut rotation attachment having an output shaft mounting portion that engages with the output shaft of the electric wrench and is rotated by the output shaft is provided at the other end.

When it is necessary to replace the tire, for example, when the tire is punctured, the tire replacement tool of the present invention is used to mount a wheel nut rotation attachment on the output shaft of the electric wrench and use the electric wrench. The wheel nut of the tire can be easily loosened.
Next, the wheel rotation attachment is removed from the electric wrench, and the jack rotation attachment is attached to the output shaft of the electric wrench instead. Then, the jack engaging portion of the jack rotating attachment is engaged with a driven joint of a manual jack such as a pantograph jack which is usually used. If the electric wrench is driven in that state, the attachment for rotating the jack rotates, the rotation is transmitted from the driven joint to the manual jack, and the manual jack is easily lifted by the power of the electric wrench.

After replacing the tire, the jack rotation attachment is removed from the electric wrench to tighten the wheel nut for fixing the new tire, and the wheel nut rotation attachment is attached to the output shaft of the electric wrench instead. Then, by tightening the wheel nut, the tightening operation of the nut can be easily performed by power. To dismount the vehicle body, the attachment for rotating the jack may be attached to the electric wrench again, and the manual jack may be lowered by its power.

As described above, with a simple tool, the tightening / loosening work of the wheel nut and the raising / lowering work of the manual jack at the time of tire replacement can be easily carried out by the power of the electric wrench without the use of power, and the manual jack is also used. Since the drive source of 1 and the drive source of the wrench are the common power source of the electric wrench, the number of tools (parts) is small and the space can be saved when the vehicle is mounted while the tire replacement work is electrically operated.

Generally, an automobile is provided with a manual jack such as a pantograph jack and a crank handle (crank rod) for manually turning the jack, and a nut wrench for manually turning a wheel nut of a tire is usually provided. Is. Even if an electric wrench and an associated wrench piece are provided, the wheel nut can be turned by an electric wrench, but the pantograph jack or the like must be manually lifted by turning the crank bar. In order to eliminate this burden, if an electric jack is added,
It is bulky to store with an electric wrench and an electric jack, and the manual (pantograph jack) is useless. If the manual jack is always available, an electric wrench, an electric jack, and a manual jack will be mounted on an automobile, but it requires a dedicated space and a considerable weight, which results in poor traveling fuel efficiency.

If the manual jack is omitted, the electric wrench and the electric jack can be used. However, when the electric power cannot be secured (for example, the electric wrench is insufficiently charged), the electric wrench fails. If you do, you may not be able to jack up (replace tires). Therefore, it is difficult to remove the manual pantograph jack, and it is easy to put the manual jack on the car in addition to this even after the electric jack is always stocked, but in the end, it takes a considerable amount of storage space and extra space. Is unfavorable because of the weight.

According to the present invention, if the electric wrench, the manual jack and the attachment are loaded in the vehicle, the power of the electric wrench can electrically operate the manual jack through the attachment for rotating the jack. There is no need for a jack, the existing manual jack can be used effectively, and the storage space is small. In addition, since the wheel nut can be tightened and loosened through the nut rotation attachment (wrench piece) by the power of the electric wrench, the electric wrench can provide the functions of one and two stones. Moreover, since a general-purpose manual jack is assumed, even if there is a situation where it is difficult to use the electric wrench due to a malfunction of the electric wrench or insufficient charging, at that time, follow the normal usage and rotate the manual jack with the crank bar. For example, you can use the jack manually and don't worry if it happens.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 conceptually shows a relationship between each member of the tire exchanging tool, a tire wheel 8 and a pantograph jack (manual jack) 7, which are objects of use, when the tire exchanging tool of the present invention is used for tire exchanging. It is a figure.

The tire exchanging tool includes an impact trench (electric wrench) 1, a socket (wheel nut rotating attachment) 2, and a jack rotating shaft (jack rotating attachment) 3. The impact wrench 1 is equipped with a power cord, and is equipped with a plug that enables reception of power from a cigarette power supply (not shown),
Alternatively, it is driven by electricity with a built-in rechargeable battery. The impact wrench is provided with a trigger (rotary drive button) 11, an output shaft 12, and a drive direction changeover switch 13. The trigger 11 is for instructing drive / stop, and the forward / reverse rotation direction of the impact wrench 1 is designated by switching the drive direction changeover switch 13. The output shaft 12 is formed in a substantially rectangular parallelepiped shape, and is rotated about its center by driving.

The socket 2 is formed in a substantially cylindrical shape, and as shown in FIG. 2, a prism-shaped hole portion 21 for accommodating and engaging (fitting) the output shaft 12 of the impact wrench 1 is formed at one end. A hexagonal nut engaging hole portion 22 is formed on the other end side so as to engage with the wheel nut 4. The hole 22 is formed sufficiently deep and has a size such that the entire wheel nut 4 can be accommodated therein. The jack rotating shaft 3 has a cylindrical shape at one end, a shaft extending in the middle to form a connecting shaft 33, and the other end having a jack engaging portion 31 bent in a hook shape or a hook shape. It is formed so that it can be engaged with the driven joint 6 of the jack 5. On the side formed in a columnar shape, a prismatic rotary output shaft engaging hole 31 for accommodating and engaging (fitting) the output shaft 12 of the impact wrench 1 is formed. As shown in FIG. 2C, a T-shaped jack engaging portion 34 may be formed at the other end of the connecting shaft portion 33.

The connecting shaft portion 33 has such a length that it is easy to replace the tire, and has a length and robustness not to be damaged by the torsional load and impact received by driving the impact wrench.

Further, the panta jack 5 as a manual jack has a base 9, a load base 7, a diamond-shaped link portion 15 connecting the base 9 and the load platform 7 in a pantograph shape, and the diamond-shaped link portion 15 is expanded and contracted. The screw shaft 16 for moving up and down the load base 7 is provided, and the driven joint 6 formed at one end of the screw shaft 16. When the screw shaft 16 is rotated in one direction, the diamond-shaped link portion 15 extends vertically and the load table 7
Will rise, and if it is rotated in the opposite direction, it will fall. The driven joint 6 may be either an annular loop portion (hole portion) or a hook-shaped portion. The jack engaging portion of the jack rotation shaft 3 is detachably engaged with the driven joint 6, and the rotational force of the rotation shaft 3 is transmitted to the screw shaft 16 of the jack 5. The internal specifications of the impact trench are the same as known ones, and therefore will not be described in detail here.

Next, the flow of the actual work for replacing the tire will be described with reference to FIGS. FIG. 3 shows a procedure for removal. First, as shown in (a), in order to loosen the wheel nut, the hole portion 21 of the socket 2 of the output shaft 12 of the impact wrench 1 is engaged and mounted,
The drive direction changeover switch 13 is operated to specify the drive direction as reverse rotation. Then, the hole 22 is engaged with the wheel nut 4, and the trigger 11 is operated to loosen the wheel nut. Repeat this to loosen all wheel nuts on the wheel.

After loosening the nut, the socket 2 is removed and the jack rotation shaft 3 is attached (see FIG. 3).
(B)). Then, the driving direction is designated as normal rotation, the engaging portion 32 is engaged with the driven joint 6 of the jack 5 placed at the jack-up point of the automobile for tire replacement, and the trigger 11 is operated to perform jack-up. . That is, when the impact wrench 1 is rotated in the forward direction, the jack rotation shaft 3 is rotated, the rotational force is transmitted to the jack 5, the screw shaft 16 is rotationally driven, and the load platform 7 is raised. When the vehicle body is sufficiently lifted as shown in FIG. 3 (d), the loosened wheel nut 4 is removed, the tire 8 is taken out from the wheel hub, and the hub bolt 10 is inserted into the bolt hole of the new tire 8 '.

The mounting procedure will be described below with reference to FIG. Remove the jack rotation shaft 3 from the impact wrench 1,
Attach the socket 2 (Fig. 4 (a)). And (b)
As shown in FIG. 5, the impact wrench 1 is driven in the normal rotation to tighten the wheel nut 4 on the hub bolt 10.
This is repeated for the number of nuts to complete the temporary fixing of the tire 8 '.

Next, the socket 2 is removed, the jack rotation shaft 3 is attached, and the drive direction is designated as the reverse direction (FIG. 4 (c)). Then, as shown in (d), the engaging portion 31 is engaged with the driven joint 6 of the jack 5 lifting the automobile, and the trigger 11 is operated to drive the impact wrench 1 to lower the jack.

Finally, the wheel nut 4 is finally tightened by replacing the socket 2 with the socket 2 and designating the normal rotation, and the tire replacement work is completed. In this way, for a series of tire replacement work, by changing the attachment and designating the rotational drive direction, using one impact wrench 1 as a power source, everything from loosening and tightening the nut to lifting and lowering the pantograph jack is made easy by electric. You can do the work.

[Brief description of drawings]

FIG. 1 is a view conceptually showing a relationship between a tire exchanging tool of the present invention, a tire wheel which is an object of use thereof, and a pantojack.

FIG. 2 is a front view and a side view of a socket and a jack rotation shaft.

FIG. 3 is a diagram illustrating a tire removing process when a tire is replaced.

FIG. 4 is a diagram illustrating a tire mounting process at the time of tire replacement.

[Explanation of symbols]

1 Impact Wrench (Electric Wrench) 2 Socket (Wheel Nut Rotating Attachment) 3 Jack Rotating Shaft (Jack Rotating Attachment) 12 Output Shaft 21 Socket Hole (Output Shaft Attachment) 31 Jack Rotating Shaft Hole (Output Shaft) (Mounting part) 32 Jack engaging part

Claims (4)

[Claims] 1. A portable electric wrench having an output shaft capable of forward and reverse rotation drive, and a rod-shaped form, one end of which is detachably engaged with a driven joint for raising and lowering a manual jack. A jack engaging portion for rotating the driven joint to move the manual jack up and down is formed, and the other end portion is detachably engaged with the output shaft of the electric wrench and is rotated by the output shaft. And a jack rotation attachment having a portion formed in a short shaft shape, and a nut engagement portion that engages with a tire fixing wheel nut to rotate the nut is formed at one end thereof, and the other end A wheel nut rotation attachment having an output shaft mounting portion that engages with the output shaft of the electric wrench and is rotated by the output shaft. 2. The output shaft mounting portion of the jack rotation attachment and the output shaft mounting portion of the wheel nut rotation attachment are both detachably and non-rotatably fitted to the output shaft having a rectangular cross section of the electric wrench. The tire exchanging tool according to claim 1, wherein the fitting holes have a common rectangular cross section. 3. The jack rotation attachment comprises:
The output shaft mounting portion at one end and the jack engaging portion at the other end,
The tire replacement tool according to claim 1 or 2, wherein the tire replacement tool is coaxially connected by a linear connecting shaft portion. 4. The jack rotating attachment according to any one of claims 1 to 3.