JPH10180649A - Extracting tool for kingpin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tool with improved operability for easily and accurately extracting a kingpin even arranged at limited space therearound in a vehicle. SOLUTION: A cylindrical punched bolt 6 is screwed into a hollow body 5 detachably mounted on the top face of a knuckle 2 coaxially with a kingpin 3 in place of a cover. The punched bolt 6 receives and holds rotatable a center bolt 7 formed at its tip with a threaded portion 7a adapted to spirally engage with a tapped hole 3a formed in the top face of the kingpin 3. The winding of the thread of the punched bolt 6 is reversed to that of thread of the center bolt 7, and the tool-engaging part 6a of the punched bolt 6 and the head 7b of the center bolt 7 are exposed outside the body 5 and the punched bolt 6 respectively. That permits easy and accurate extraction of the kingpin 3 only through the mounting of the body 5 on the top face of the knuckle 2 and the subsequent rotation of the center bolt 7 and the punched bolt 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tool for extracting a kingpin for pivotally attaching a knuckle to an axle beam of an automobile, and in particular, to easily and accurately extract a kingpin without requiring special skill. It relates to tools that can be used.

[0002]

2. Description of the Related Art Conventionally, in order to remove a kingpin, the kingpin is hit with a hammer, or
I was pulling it out with a sliding hammer. However,
When the kingpin and the axle beam are stuck, it is difficult to remove the kingpin, especially in vehicles where the steered wheels are the driving wheels, such as all-wheel drive vehicles, because the space around the kingpin is limited. There was a problem that it was difficult to use a hammer or the like, and the workability of pulling out the kingpin was poor.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and enables a kingpin to be easily and easily mounted on a vehicle in which the space around the kingpin is greatly restricted without requiring special skill. An object of the present invention is to provide a king pin extracting tool excellent in operability that can be accurately extracted, thereby improving the king pin extracting workability.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a hollow hologram detachably mounted coaxially with a king pin in place of a cover attached to the upper surface of a knuckle so as to cover the upper surface of the king pin. A cylindrical extraction bolt is screwed into and held in the body, and a center bolt formed at the tip with a screw portion screwed into a screw hole provided on the upper end surface of the king pin is rotatably inserted into the extraction bolt from above. Wearing and holding. And, while making the direction of the screw of the extraction bolt reverse to the direction of the screw of the center bolt,
The tool engaging portion of the drawing bolt and the head of the center bolt are exposed to the outside of the body and the drawing bolt, respectively.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a longitudinal sectional view showing an embodiment of a kingpin punching tool according to the present invention, FIG. 2 is a plan view of the kingpin punching tool shown in FIG. 1, and FIG. It is the front view which fractured | ruptured some which illustrates the state attached to the end surface.

In these figures, a tool 4 for extracting a kingpin 3 for pivotally connecting a knuckle 2 to an axle beam 1 is replaced by a cover (not shown) attached to the upper end surface of the knuckle 2 to cover the upper end surface of the kingpin 1. Body 5 detachably mounted coaxially with the king pin 3
have.

The body 5 is formed in a hollow cylindrical shape having a lower end surface serving as a seat for the upper end surface of the knuckle 2 and a screw hole provided in the center of the upper wall. The bolt 6 is inserted and held. In addition, a center bolt 7 having a threaded portion 7a at the tip to be screwed into a threaded hole 3a provided on the upper end surface of the king pin 3 is rotatably inserted into the inside of the extraction bolt 6 from above.

When the screw of the screw hole 3a of the kingpin 3 and the screw of the center bolt 7 are, for example, right-handed screws, the screw of the drawn-out bolt 6 is set to the left-handed screw. Of the tool bolt 6 and the head 7b of the center bolt 7 are exposed to the outside of the body 5 and the bolt 6, respectively.
And the center bolt 7 can be independently rotated from the outside. 8 is a bolt for tightening and fixing the body 5 to the upper surface of the knuckle 2, 9 is a bushing interposed between the knuckle 2 and the king pin 3, 1
0 is a thrust bearing.

When the king pin 3 is pulled out by using the king pin pulling tool 4 having the above-described configuration, a cover (not shown) attached to the upper end surface of the knuckle 2 is removed, and the body 5 is bolted to the knuckle 2. Attach to the top surface of.

After attaching the body 5 in this manner, a tool (not shown) is engaged with the head 7a and the center bolt 7 is rotated clockwise to insert the screw portion 7a formed at the tip thereof into the screw hole 3a of the king pin 3. Screw it in. When a tool (not shown) is engaged with the tool engaging portion 6a and the drawing bolt 6 is rotated clockwise to move the drawing bolt 6 upward with respect to the body 4, the upper end surface of the drawing bolt 6 becomes the head of the center bolt 7. Since the center bolt 7 is raised by contacting the lower surface of the portion 7b, the kingpin 3 can be reliably pulled out even if the axle beam 1 and the kingpin 3 are stuck.

In the rotation operation of the pulling bolt 6, the direction of the screw of the pulling bolt 6 is reversed to the direction of the screw of the center bolt 7. Therefore, even if the center bolt 7 rotates together with the extraction bolt 6 due to the frictional force between the bolts 6 and 7 with the upward rotation of the extraction bolt 6, the screw portion 7 a of the center bolt 7 is screwed into the screw hole 3 a of the king pin 3. The center bolt 7 does not come off the kingpin 3.

That is, since the kingpin 3 can be reliably pulled out only by rotating the center bolt 7 and the pullout bolt 6, there is no need to hit the kingpin with a hammer as in the prior art, and the work space is restricted. In this case, the kingpin 3 can be easily and accurately extracted.

FIG. 4 shows the king pin removing tool 4 shown in FIG.
FIG. 13 is a plan view showing a modified example of the first embodiment. In this modified example, a part of the outer periphery of the body 5 is cut out to provide a window 5a so that the inside of the body 5 can be visually recognized from the window 5a. I have to. Accordingly, when the window 5a is provided in a part of the body 5, the state of the kingpin 3 coming out can be directly visually confirmed.
There is an advantage that the operation of extracting the king pin 3 can be performed more smoothly.

In the embodiment, the screw of the center bolt 7 is a right-hand screw and the screw of the extraction bolt 6 is a left-hand screw. However, the screw portion 7a of the center bolt 7 is a left-hand screw and the right screw is cut into the extraction bolt 6. In addition, the direction of the screw of the extraction bolt 6 can be reversed from the direction of the screw of the center bolt 7.

Further, in the embodiment, the tool engaging portion 6a of the extraction bolt 6 and the head 7b of the center bolt 7 have a hexagonal cross section, respectively. However, the shapes of the tool engaging portion 6a and the head 7b are the same as those of the embodiment. The present invention is not limited to this, and any material may be used as long as it can easily rotate the drawing bolt 6 and the center bolt 7 from the outside of the body 5 and the drawing bolt 6.

[0016]

As is apparent from the above description, according to the present invention, the kingpin can be mounted only by performing a simple operation of rotating the center bolt and the pullout bolt by attaching the body to the upper end surface of the knuckle instead of the cover. Because it is possible to reliably remove the kingpin, the kingpin can be easily and accurately extracted without requiring special skill even in a vehicle in which the space around the kingpin is greatly restricted, thereby improving the workability of extracting the kingpin. be able to.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a king pin removing tool according to the present invention.

FIG. 2 is a plan view of the king pin removing tool shown in FIG.

FIG. 3 is a partially broken front view illustrating a state where the king pin removal tool shown in FIG. 1 is attached to an upper end surface of a knuckle.

FIG. 4 is a plan view showing a modified example of the king pin punching tool shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Axle beam 2 Knuckle 3 King pin 3a Screw hole 4 King pin extraction tool 5 Body 6 Extraction bolt 6a Tool engagement part 7 Center bolt 7a Screw part 7b Head

Claims (1)

[Claims] 1. A tool for extracting a king pin for pivotally attaching a knuckle to an axle beam, wherein the tool is detachably mounted coaxially with the king pin instead of a cover attached to the upper surface of the knuckle so as to cover the upper surface of the king pin. A hollow body to be attached, a cylindrical bolt that is screwed and held in the body, and a screw hole that is rotatably inserted into the bolt from above and that is screwed into a screw hole provided in the upper end surface of the king pin. A center bolt having a threaded portion formed at the tip thereof is provided. The direction of the screw of the extraction bolt is opposite to the direction of the screw of the center bolt. A king pin removal tool exposed to the outside of the bolt.