JPH0418773Y2 - - Google Patents

Description

[Detailed Description of the Invention] A. Field of Industrial Application The present invention relates to a power transmission tool for tightening bolts and nuts in narrow spaces.

B. Prior Art Bolts and nuts are indispensable when assembling parts in the engine room or underfloor chassis parts of a vehicle to a vehicle body. However, bolts and nuts are not always in positions that are easy to tighten.
As a tool for such a case, there is a box wrench 401 shown in FIG. 9, which is supported by JIS B4632.

Also, as tools for tightening bolts and nuts in narrow spaces using air tools, there is an extension bar 402 for socket trenches shown in Figure 10 disclosed in JIS B4637, and an extension bar 402 for socket trenches shown in Figure 11 disclosed in JIS B4639. There is a universal joint 403 for a socket trench shown.

C. Problems to be solved by the invention However, the box wrench 401 is a tool for manually tightening bolts and nuts, and there is a problem in that it is very inefficient when used on a vehicle production line.

On the other hand, in order to use an air tool and tighten a bolt or nut in a narrow space, there is a method in which a universal joint 403 for a socket trench and/or an extension bar 402 for a socket trench are interposed between the socket and the air tool. However, there are some parts that cannot be tightened even with this method.

The purpose of the present invention is to provide a tool for tightening bolts and nuts located in narrow spaces that cannot be tightened using conventional tools.

D Means for Solving the Problems In order to achieve the above object, the present invention has a handle attached to one end of the casing and a fitting part that can be fitted to the rotating part of the air tool. A driving gear is pivotally supported by the casing, one end of a sub-casing extending in a direction substantially perpendicular to the casing is coupled to the other end of the casing, and a fitting fitting that fits into the bolt head is coupled to the other end of the sub-casing. A tightening gear having a hole is pivotally supported, and the tightening gear and the driving gear are meshed with each other via a driving force transmission gear.

E Action Grasp the handle of the power transmission tool with one hand, fit the fitting hole of the tightening gear into the head of a nut or bolt in a narrow space, grip the handle of the air tool with the other hand, and When the rotating part of the tool is fitted into the fitting part of the drive gear of the power transmission tool and the trigger of the air tool is pulled, the tightening gear rotates in the same direction as the rotating part of the air tool, tightening bolts and nuts. can be tightened.

F. Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 8 is a perspective view showing underfloor chassis parts of a cab-over type vehicle. Insert the rubber bushing 307 into the front stabilizer 303, apply the clamp 306 to the rubber bushing 307,
It is attached to the vehicle body side bracket 308 with two bolts 304 and 305, but in order to tighten the lower bolt 304, it is sufficient to insert a normal socket 150 into the rotating part 201 of the air tool 200 and tighten it.

However, the upper bolt 305 is the relay lever 30
2 is in the way so I can't tighten it. Therefore, tightening can be achieved by using a box wrench 401 shown in FIG. 9, but this is not suitable for a production line because it requires manual labor.

As tools for working in narrow spaces that can be used in conjunction with the air tool 200, there are an extension bar 402 for socket trenches shown in FIG. 10 and a universal joint 403 for socket trenches shown in FIG. Bolt 305 cannot be tightened. Therefore, the assembly procedure must be changed. That is,
Rubber button 3 on front stabilizer 303
Insert the clamp 306 into the rubber button 3.
07, and attach it to the vehicle body side bracket 308 with bolts 304 and 305, then remove the relay lever 3.
02 and the drag link 301 must be attached to the vehicle body.

Air tool 200 can be used without changing the procedure.
A power transmission tool for working in narrow spaces, which enables tightening of bolts 305 using a screwdriver, is shown in FIGS. 1 to 3, and its main components are shown in FIGS. 4 to 7. The casing 10 shown in FIG. 1 consists of a main body 11 and two covers 12 that cover the top and bottom of the main body 11 facing each other, and are screwed together with six bolts 15.
Fitting holes 13 and 16 are provided at both ends of the cover 12 to fit into the cylindrical portion 42 of the first driving gear 40 shown in FIG.
is provided.

Inside the casing 10, a first driving gear 40 and a second driving gear 80 are pivotally supported in the fitting hole 13 and the fitting hole 16, respectively. Between them, three driving force transmission gears 30 shown in FIG. It is pivoted.

Further, a handle 70 whose surface is knurled is welded to one end of the casing 10. Similar to the casing 10, the sub-casing 20, which extends in a direction substantially perpendicular to the casing 10, is made up of a main body 21 and two covers 22 that cover the top and bottom of the main body 21 facing each other. It is screwed on. One end of the sub-casing 20 is connected to the casing 10 via the extension cover 17.
is connected to the other end of the

A fitting hole 23 is provided at one end of the cover 22 to fit into the cylindrical portion 52 of the tightening gear 50 shown in FIG. 4, and the other end is provided to fit into the cylindrical portion 42 of the first driving gear 40. A fitting hole 26 is provided.

Inside the sub-casing 20 is the tightening gear 50.
is pivotally supported in the fitting hole 23 , a third driving gear 90 is pivotally supported in the fitting hole 26 , a driving force transmitting gear 30 is meshed between them, and the rotating shaft 31 is attached to the cover 22 . It is pivotally supported by a bearing portion 24 provided.

The first driving gear 40 includes the rotating part 2 of the air tool.
01 is provided, and the tightening gear 50 is provided with a fitting hole 51 that fits into the head of a bolt or a nut.

The extension 60 shown in FIG. 6 is inserted into the extension cover 17 shown in FIG. Both ends are welded to the casing 10 and the sub-casing 20, respectively. By the way, the first
~3 driving gears 40, 80, and 90 have the same shape. Moreover, the first to third driving gears 40, 80, 90
The driving force transmission gear 30 and the tightening gear 50 each have the same number of teeth.

To tighten the bolt 305 shown in FIG. 8 after assembling the drag link 301 and relay lever 302 to the vehicle body, grasp the handle 70 with one hand, fit the tightening gear 50 into the head of the bolt 305, and Holding the air tool with the other hand, rotate the rotating part 201 with the first or third driving gear 40, 9.
0, which is easier to work with, and when the air tool is operated, the tightening gear 50 rotates in the same direction as the rotating part 201 of the air tool, and the bolt 3
05 can be tightened.

Furthermore, the present power transmission tool 100 for working in narrow spaces can be used upside down and can be used in various narrow spaces.

Also, by setting the rotation of the air tool in the opposite direction, you can loosen or remove bolts and nuts in tight spots.

G. Effects of the invention As explained above, according to the invention, a driving gear that fits into the air tool is provided at one end of the casing, and a sub-casing that extends in a direction substantially perpendicular to the casing is provided. One end of the sub-casing is connected, and the other end of the sub-casing is provided with a tightening gear that fits into the bolt head.

Therefore, in the case of a simple straight narrow space, bolts can be tightened by inserting only the sub-casing into the narrow space, and by grasping the handle, the casing and sub-casing can be tightened. By controlling the position, it can be used in complex and narrow spaces.

Furthermore, since the overall shape of the power transmission tool for working in narrow spaces is approximately L-shaped, if the power transmission tool for working in narrow spaces is turned upside down, the tightening device provided at the other end of the sub-casing can be removed. The position of the attachment gear can be shifted between one side and the other side of the casing, thereby making it possible to use it correspondingly in various narrow spaces.

Further, since the drive gear and the handle are provided at one end of the casing and are close to each other, there is no need to insert the air tool into a narrow space, and work in a narrow space can be easily performed. Furthermore, by grasping the handle, it is possible to effectively prevent the inconvenience of the power transmission tool for working in narrow spaces being swung around as the air tool fitted to the drive gear rotates.
Therefore, in order to prevent the power transmission tool for working in narrow spaces from being swung around, it is not necessary to combine the power transmission tool for working in narrow spaces with the air tool; instead, it is not necessary to connect the air tool to the fitting part of the drive gear. Work can be performed only by fitting them together. Therefore, when tightening bolts of different sizes, it is possible to quickly replace the bolt with a power transmission tool for working in narrow spaces that matches the size of the bolt.
This makes it possible to fully use it for fast-speed line operations such as automobile manufacturing lines.

[Brief explanation of drawings]

Figure 1 is a plan view showing one embodiment of the present invention, Figure 2 is a plan view showing one embodiment of the present invention;
The figure is a front view of the same, and FIG. 3 is a bottom view of the same. 4 to 7 are perspective views showing the components of one embodiment of the present invention, and FIG. 8 is a perspective view showing a method for tightening bolts in narrow spaces using one embodiment of the present invention. 9 to 11 are perspective views of the tool disclosed in JIS. 10... Casing, 17... Extension cover, 20... Sub casing, 30... Drive force transmission gear, 40... First drive gear, 50
... Tightening gear, 60 ... Extension, 7
0...Handle, 80...Second drive gear, 90...
Third drive gear.

Claims (1)

[Scope of utility model registration request] A handle is attached to one end of the casing and has a fitting part that can be fitted to the rotating part of the air tool, and a driving gear is pivotally supported, and the other end of the casing extends in a direction substantially perpendicular to the casing. One end of the sub-casing is coupled to the other end of the sub-casing, and a tightening gear having a fitting hole that fits into the bolt head is pivotally supported, and the tightening gear and the driving gear are connected to each other. A power transmission tool for working in narrow spaces, characterized in that the tool is meshed with a power transmission gear.