JP3178992B2 - Removal tool for cone washer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cone washer releasing tool for removing a cone washer interposed between a stud bolt and a stud bolt at a portion of the hole through which the stud bolt is inserted.

[0002]

2. Description of the Related Art Cone washers are used for various devices and devices in which stud bolts are used.
It is widely used in freewheel hubs for cars and large vehicles.

FIG. 6 is an external view showing an assembled state of a freewheel hub of a heavy-duty truck. This freewheel hub is disassembled and repaired during body repair and inspection before vehicle inspection,
In particular, replacement of gaskets and the like is performed. As shown in FIG. 7 , the freewheel hub is formed by assembling various components, and is attached to the outside of the hub body 1 (end face member). The hub body 1 is provided with six stud bolts 3 around an axle shaft 2 (base shaft).

The freewheel hub is constructed by attaching a freewheel hub body sub-assembly 5 (outer member) to the outside of the hub body 1 with a flange gasket 4 interposed therebetween. The freewheel hub body sub-assembly 5 has through holes 6 (six places) through which the stud bolts 3 can be inserted in the peripheral flange portion. The stud bolts 3 are inserted into the respective through holes 6 so that the hub body 1 can be inserted into the hub body 1. It can be attached. Here, the attachment of the sub-assembly 5 to the hub body 1 is illustrated between the insertion hole 6 and the stud bolt 3.
11 , a cone washer 7 having an overall tapered shape is interposed, and a washer 8 is inserted through the bolt 3 so that the bolt 3
This is done by screwing a nut 9 into the nut. That is, the cone washer 7 has a slit as shown in FIG. 11 and has a function of being inserted into the stud bolt 3 and further eliminating a gap between the insertion hole 6 and the stud bolt 3. Further, a set bolt 10 is attached to the axle shaft 2, and in this state, the body sub-assembly 5
A freewheel hub cover sub-assembly 12 is attached to the outside of the vehicle with a hub gasket 11 interposed therebetween. In the freewheel hub cover sub-assembly 12,
Bolt insertion holes 14 are formed at positions corresponding to the six bolt holes 13 formed in the boss portion of the body sub-assembly 5. That is, the cover sub-assembly 12 matches the insertion hole 14 with the bolt hole 13 and
It is attached by screwing a bolt 15 to 3.

When disassembling the freewheel hub assembled in this manner, the components shown in FIG. 7 are removed in reverse to the order of assembly. That is, the decomposition
8 to remove the cover subassembly 12, as shown, further removed set bolt 10, and then is carried out as removing the body sub-assembly 5 as shown in FIG.
Removal from the hub body 1 of the body sub-assembly 5, first, remove the washer 8 with the stud bolt 3 remove the nut 9 and then to pull the cone washer 7 as shown in FIG. 10 from the insertion hole 6. As shown in FIG. 9 , the cone washer 7 can be detached by contacting a stud 16 with the tip of the stud bolt 3 and hitting the hammer 17 accordingly.
And to perform by applying hitting or, or the impact of an arrow A direction in the flange portion of the body sub-assembly 5 as shown in FIG. 10 with a hammer 17. That is, by applying an impact in the direction of arrow B to the stud bolt 3 or an impact in the direction of arrow A to the body sub-assembly 5, the contact between the cone washer 7 and the insertion hole 6 is released, and the cone washer 7 Directional forces will act. By performing such an operation on all the stud bolts 3, the cone washer 7 is detached, and the body sub-assembly 5 can be removed from the hub body 1.

[0006]

However, according to the above-mentioned conventional method of detaching the cone washer, since the impact is directly applied to the stud bolt 3 by the hammer 17, the bolt 3 is bent or the thread of the bolt 3 is broken. In addition, even when an impact force is applied to the body sub-assembly 5, a hammer mark may remain on that portion, and a user may complain. Further, according to the above-mentioned conventional method, there was also reported a risk that the cone washer 7 would jump out toward a repair worker due to an impact.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and has as its object to safely remove a cone washer without damaging stud bolts and outer members.

[0008]

Means for Solving the Problems To achieve the above object, a first aspect of the present invention is to provide an insertion hole for inserting a stud bolt outside an end face member having a plurality of stud bolts around a base shaft. Attach the outer member provided, insert a cone washer into the insertion hole, and further remove the nut from the stud bolt in a state where the outer member to be connected by screwing the nut to the stud bolt is detached from the end face member. Further, in the cone washer removal tool used when removing the cone washer from the insertion hole, the base is disposed opposite to the outer member, and the base is disposed on the axis of the base shaft, and the base is supported by the base. A coupling member that couples the distal end portion to the outer member to enable the base to face and position the outer member; At least two abutment members, which are positionable with respect to the bolt, are adjustable with respect to the stud bolt, and have a recess at the tip which abuts against the head of the stud bolt and is receivable; Provided at the center, the head of the stud bolt is received in the recess of each abutment member, and in the state where the abutment member abuts against the stud bolt, the impact member such as a hammer can be hit, and the impact And a hit portion that allows the cone washer to be detached from the insertion hole.

According to a second aspect of the present invention, an outer member having an insertion hole through which the stud bolt is inserted is attached to an outer side of the end member having the stud bolt, and a cone washer is inserted into the insertion hole. In a state where the outer member joined by screwing the nut to the stud bolt is detached from the end face member, the nut is removed from the stud bolt, and the cone washer removal tool used for removing the cone washer from the insertion hole. A stud bolt is provided at the distal end thereof for receiving a stud bolt, and its peripheral portion is abutted against an outer member of the peripheral portion of the insertion hole, and a striking member such as a hammer can be hit at a base end portion. and a target hitting portion to releasably cone washer from the insertion hole, the stack into the recess
It is provided with a screw hole to be screwed into the dowel bolt .

[0010]

According to the first aspect of the present invention, the base is coupled to the outer member in a state where the base is opposed to and positioned with respect to the outer member, and each abutment member is positioned corresponding to the stud bolt, and the stud bolt is received in the recess. The stud bolts against the abutment member. By hitting the hitting member such as a hammer on the hitting portion in this state, an indirect impact force is applied to the bolt, and the cone washer jumps out of the insertion hole. At this time, the protruding cone washer comes into contact with the abutment member outside the concave portion, so that there is no danger to the repair worker. Further, since an indirect impact force is applied to each bolt along the central axis of the bolt, the bolt is not deformed or the thread is not broken. Therefore, it is possible to safely remove the cone washer without damaging the stud bolt and the outer member.

According to the second aspect of the present invention, the peripheral portion of the concave portion of the removal tool abuts against the outer member of the peripheral portion of the insertion hole,
Further, a stud bolt is screwed into a screw hole in the recess. In this state, by hitting the hitting member with the hitting portion, the cone washer jumps out of the insertion hole. On this occasion,
The protruding cone washer fits in the recess, so that there is no danger to the repair worker. Further, since the impact force by the impact member is uniformly applied to the periphery of the insertion hole, there is no trace of the hammer or damage to the outer member unlike the related art. Therefore, it is possible to safely remove the cone washer without damaging the stud bolt and the outer member.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 3 relate to a first embodiment of the present invention and relate to a release tool according to the first aspect. As shown in FIG. 2, the cone washer release tool 20 is disposed opposite to a freewheel hub body sub-assembly 4 as an outer member, and has a disc-like shape whose center is disposed on the axis of the axle shaft 2. A base 21 is provided. Three long holes radially extending from the center of the base 21 are formed on the left (22A, 22B, 22C) and three on the right (23A, 23B, 23C). A bolt as a connecting member can be inserted into each of the long holes 22A to 22C and 23A to 23C. As the bolt, a long long bolt 24 below the neck or a short short bolt 25 below the neck is selectively inserted. You. That is, the bolts 24 and 25 can be slidably adjusted along the longitudinal direction of the long holes 22A to 22C and 23A to 23C. For example, in the case of the short bolt 25, the bolts 24 and 25 are screwed into the bolt holes 13 of the body sub-assembly 5. The long bolt 24 can be screwed into a service tap 26 drilled in the body sub-assembly 5 (a bolt hole drilled in advance by a manufacturer for repair work) (see FIG. 3). .

In the state where the bolts (24 or 25) are connected to the body sub-assembly 5, the base 21
Are opposed and positioned on the axis of the axle shaft 2, and in this state, the two abutment members 27 supported by the base 21 are respectively opposed to the stud bolts 3. That is, each abutment member 27 is supported by a long hole 28 radially drilled in the base 21, is slidable along the long hole 28, and is provided with a stud bolt 3.
(See FIG. 1).
reference). The abutment member 27 is formed as a whole bolt having a thread portion on the outside, and retaining rings 29 and 30 are screwed to the thread portion while sandwiching the base 21 (see FIG. 1).

A recess 31 for receiving the head of the stud bolt 3 is formed at the tip of the abutment member 27, and each abutment member 27 for facing and positioning the stud bolt 3 is shown in FIG. The tip is advanced toward the stud bolt 3. In a state where the recess 31 is abutted against the stud bolt 3, the retaining rings 29 and 30 are attached to the base 2.
1 in the clamping direction, thereby stud bolt 3
Then, the abutting member 27 is abutted against the body 21 to maintain the state in which the base 21 faces the body sub-assembly 5.

A hit member 33 is fitted outside a fitting hole 32 formed at the center of the base 21. As described above,
In a state where the concave portion 31 of the abutment member 27 abuts against the stud bolt 3, an impact force in the direction of arrow D is applied to the center of the hit member 33. The impact force is applied by an impact member such as a hammer,
The impact force generated and hit by the hit member 33
From the base 21, from the base 21 to the abutment member 27, from the abutment member 27 to the stud bolt 3, whereby the cone washer 7 is subjected to a force in the detaching direction from the insertion hole 6 (in the direction of arrow C). Force). As a result, the cone washer 7 comes off in a state of protruding from the insertion hole 6, and the cone washer 7 is
It will be in contact with the tip of the abutment member 27 on the outside.

By changing the position of the base 21 and abutting the abutment member 28 against each of the stud bolts 3, all the cone washers 7 can be detached from the respective stud bolts 3. The body sub-assembly 5 can be removed from the hub body 1.

Next, the operation of the above embodiment will be described. According to the release tool 20 according to the above embodiment, the base 21 can be connected to the body sub-assembly 5 with the bolts 24 and 25 as connecting members in a state where the base 21 and the body sub-assembly 5 face and are positioned. Becomes In this state, the respective abutment members 27 are positioned corresponding to the stud bolts 3 and
The stud bolt 3 is moved forward and backward so as to receive the stud bolt 3, and the stud bolt 3 is brought into contact with the recess 31. Next, a striking member such as a hammer is struck against the struck member 33 to indirectly apply an impact force to the stud bolt 3. At this time, the cone washer 7 protruding from the insertion hole 6 comes into contact with the tip of the impact member 27 outside the concave portion 31, so that there is no danger to the repair worker. In addition, since an indirect impact force is applied to each stud bolt 3 along the central axis of the bolt, the bolt is not deformed or the thread is not broken. Therefore, the cone washer can be safely removed without damaging the stud bolt 3 or the body sub-assembly 5.

FIG. 4 to FIG. 5 relates to a second embodiment of the present invention, showing the disengagement device corresponding to claim 2. As shown in FIG. 4, the cone washer detacher 40 has a cylindrical shape as a whole, and has a concave portion 41 at its tip. The concave portion 41 can receive the tip portion of the stud bolt 3 and its peripheral portion is formed. Body sub-assembly 5 at the periphery of insertion hole 6
(Outer member) (see FIG. 5). Recess 4
A screw hole 42 that can be screwed into the tip of the stud bolt 3 is formed in 1, and the release tool 40 is coupled to the bolt 3 by screwing the stud bolt 3 into the screw hole 42. In this state, a striking member (a hammer or the like) is struck in the direction of arrow D against the struck portion 44 at the base end of the detachment tool 40, and an impact force is applied to the body sub-assembly 5 around the insertion hole 6. Will be added. Further, in this state, an impact force is also applied to the stud bolt 3 via the screw hole 42 to be screwed, and the cone washer 7 is separated from the insertion hole 6 in a state of protruding in the direction of arrow C. . Since the cone washer 7 thus detached fits in the concave portion 41, there is no danger to the repair worker.
Further, since the impact force applied by the impact member is uniformly applied to the periphery of the insertion hole 6, there is no trace of a hammer or damage to the body sub-assembly 5 unlike the related art.
Therefore, the stud bolt 3 and the body sub-assembly 5
It is possible to safely remove the cone washer without damaging the cone washer. Other configurations and functions are as described above.
The description is omitted because it is the same as the embodiment.

[0019]

As described above, according to the present invention,
There is an effect that the detachment operation of the cone washer can be performed safely without damaging the stud bolt and the outer member.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a state in which a cone washer is detached by a cone washer detacher according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a state in which the release tool is opposed to and positioned with respect to the body sub-assembly.

FIG. 3 is a partially broken view showing a state in which a coupling bolt is coupled to a body sub-assembly.

FIG. 4 is a perspective view showing a cone washer removal tool according to another embodiment of the present invention.

5 is a sectional view showing a state in which the cone washer is detached by the detachment tool shown in FIG. 4;

FIG. 6 is a perspective view showing the assembled freewheel hub.
is there.

FIG. 7 is a perspective view showing a disassembled state of the freewheel hub.
is there.

FIG. 8: Freewheel with cover sub-assembly removed
FIG. 2 is a perspective view illustrating an appearance of a hub.

FIG. 9 shows an example of a conventional cone washer detaching method.
It is a perspective view.

FIG . 10 is a sectional view similar to FIG . 10;

FIG. 11 is a perspective view showing the entire cone washer.

[Explanation of symbols]

Reference Signs List 1 hub body (end face member) 2 axle shaft (base shaft) 3 stud bolt 4 flange gasket 5 freewheel hub body subassembly (outer member) 6 insertion hole 7 cone washer 8 washer 9 nut 10 set bolt 11 hub gasket 12 freewheel Hub cover sub-assembly 13 Bolt hole 14 Insertion hole 15 Bolt 16 Backing plate 17 Hammer 20, 40 Removal tool for cone washer 21 Base bodies 22A to 22C, 23A to 23C Long hole 24 Long bolt (joining member) 25 Short bolt (joining member) 26 Service Tap 27 Abutment Member 28 Long Hole 29, 30 Retaining Ring 31, 41 Recess 32 Fitting Hole 33 Target Member (Target Part) 42 Screw Hole 44 Target Part

Claims (2)

(57) [Claims] An outer member having an insertion hole through which a stud bolt is inserted is attached to an outer side of an end face member having a plurality of stud bolts around a base shaft, and a cone washer is inserted into the insertion hole. Further, in a state where the outer member joined by screwing the nut to the stud bolt is detached from the end surface member, the nut is removed from the stud bolt, and the cone washer removal tool used for removing the cone washer from the insertion hole is further removed. A base which is disposed opposite the outer member and whose center is disposed on the axis of the base shaft, and a base which is supported by the base and has a distal end portion connected to the outer member, thereby connecting the base to the outer member. And a connecting member that is capable of facing and positioning, and that is slid and adjusted outward with respect to the center of the base to be capable of being positioned with respect to the facing stud bolt, At least two abutment members which are adjustable in advance and retreat, and which have a recess for receiving and receiving the head of the stud bolt at the tip thereof, and a stud provided at the center of the base and having a recess in each of the abutment members. In the state in which the impact member is received in the head of the bolt and the impact member strikes the stud bolt, the impact member such as a hammer can be impacted, and the impact can cause the cone washer to be detached from the insertion hole. And a cone washer removal tool comprising: 2. An outer member having an insertion hole through which a stud bolt is inserted is attached to an outer side of an end face member having a stud bolt, a cone washer is inserted into the insertion hole, and a nut is screwed into the stud bolt. In the state where the outer member to be joined and removed from the end face member is removed, the nut is removed from the stud bolt, and the cone washer removal tool used for removing the cone washer from the insertion hole, and the stud bolt is attached to the tip. It has a recess that can be received,
The striking part which abuts the peripheral part against the outer member of the peripheral part of the insertion hole and allows a striking member such as a hammer to be struck at the base end part, and the cone washer can be detached from the insertion hole by the impact. And screwed into a stud bolt in the recess.
A cone washer removal tool that has a screw hole .