JPH07205044A - Snap ring mounting jig - Google Patents

Abstract

PURPOSE:To simultaneously mounting a snap ring and the non-eye-viewing check of the incomplete entrance of the snap ring. CONSTITUTION:The tip portion of a jig main body 2 is provided with a snap ring pushing-in portion 6 to push in a snap ring 11 that is in the state of diameter contraction and is inserted into the inner surface portion of a component 12 on one side; a component side stopper portion 8 to butt against the component 12 on one side when the snap ring 11 has been mounted in a ring groove 15; a snap ring side stopper portion 7 that butts against the snap ring 11 when the snap ring 11 has been mounted in the ring groove 15; a snap ring projection confirming portion 9 to be inserted into the inner periphery side of the snap ring 11 when the snap ring 11 has been mounted in the ring groove 15; and a centering guide portion 10 that is to be inserted into the inner surface portion of the component 12 on one side and is to conduct the center seeking of the jig main body 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a snap ring assembling jig for assembling a snap ring into a ring groove of an inner surface of one part so as to connect two parts, one and the other.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 6, one part 30 is used to connect two parts 30, 31 of one and the other.
When assembling the snap ring 34 in the ring groove 33 of the inner surface portion 32, one end of the snap ring 34 is hooked on the ring groove 33 of the one component 30, and the other end of the snap ring 34 is attached to the inner surface portion 32 of the one component 30. With the jig 35 such as a screwdriver, the tip of the jig 35 is pressed against the snap ring 34 at a plurality of positions one after another, and the snap ring 34 is assembled into the ring groove 33. I was wearing it.

[0003]

However, in the case of assembling the conventional snap ring 34, only a part of the peripheral portion of the snap ring 34 can be pushed in by the jig 35 such as a screwdriver, and the snap ring 34 is assembled. Due to the adhesiveness, the snap ring 34 has a structure in which one place is cut and easily comes off.
There was a problem that it did not enter (incomplete entry), and there was a problem that the means for checking whether or not the snap ring 34 entered the ring groove 33 over the entire circumference was only visual.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to simultaneously check the snap ring assembly and the imperfect insertion of the snap ring other than visual check. It is to provide a snap ring assembling jig that can be used.

[0005]

In order to achieve the above object, the present invention provides a snap ring for assembling a snap ring in a ring groove of an inner surface portion of one part so as to connect two parts of one part and the other part. An assembling jig, in which the snap ring pushing part for pushing the snap ring in the reduced diameter state inserted into the inner surface of one of the parts to the tip of the jig body and the snap ring are assembled in the ring groove. When the snap ring is attached to the ring groove, the snap ring side stopper portion is attached to the ring groove, and when the snap ring is attached to the ring groove, the component side stopper portion is attached to the one portion and the snap ring is attached to the ring groove. When this happens, the snap ring protrusion confirmation part that is inserted on the inner peripheral side of this snap ring and the inner surface of one of the parts are inserted to align the jig body. And characterized by forming a Cormorant centering guide portion.

[0006]

With this structure, the centering guide portion at the tip of the snap ring assembling jig is aligned with the inner surface of one of the parts, and the snap ring assembling jig is pushed in, whereby the snap ring pushing portion is It is possible to assemble the snap ring by pushing the snap ring inserted into the inner surface of one of the parts in a reduced diameter state and dropping the snap ring into the ring groove.

Further, by dropping the snap ring into the ring groove, the snap ring expands in the radial direction,
The snap ring protrusion confirmation portion is inserted on the inner peripheral side of the snap ring to confirm the protrusion of the snap ring, and the snap ring side stopper portion contacts the snap ring and the component side stopper portion When the snap ring is hit, the assembly of the snap ring in the ring groove is confirmed.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is a partially sectional side view of a snap ring assembling jig according to the present invention, FIG. 2 is an arrow view from the direction A in FIG. 1, and FIG. 3 is an enlarged view of a portion B in FIG.

The snap ring assembling jig 1 according to the present invention has a jig body 2, a grasping portion 3 is provided at the center of the end surface of the jig body 2, and the jig body 2 has a peripheral edge portion. Is
A plurality of arm portions 4 are formed at predetermined intervals in the circumferential direction so as to project to the side opposite to the grasping portion 3.

A projecting portion 5 is provided on the outer edge of the tip portion of each of the arm portions 4, and the tip portion of the arm portion 4 including the projecting portion 5 has a step portion in three stages. , B and c are formed, the end face of the first step b is formed into the pushing part 6, the end face of the second step b is formed into the snap ring side stopper part 7, and the third step is formed. The end surface of the c is formed on the component side stopper portion 8, the outer edge of the first step a is formed on the snap ring protrusion confirmation portion 9, and the outer edge of the second step b is formed on the centering guide portion 10. Is made.

The snap ring protrusion confirmation section 9 is
The center ring guide portion 10 has an outer diameter slightly smaller than the inner diameter of the snap ring 11 after assembly, and the centering guide portion 10 has an outer diameter slightly smaller than the diameter of an insertion portion 14 of one of the components 12, which will be described later.

An insert portion 14 is formed at the end of the inner surface of one of the parts 12, 13 which are connected to each other by a snap ring 11, and a ring groove 15 is formed in this insert part 14. There is. Further, a brim-shaped portion 16 is formed at the end of the other component 13.

Next, the assembling of the snap ring 11 using the snap ring assembling jig 1 will be described. Figure 5
As shown in (1), the end portion of the other component 13 is inserted into the insertion portion 14 of the one component 12, and the insertion portion 14 is inserted.
Then, the snap ring 11 is inserted in a state where the snap ring 11 is compressed in the radial direction and reduced in diameter.

Next, holding the grasping portion 3 of the snap ring assembling jig 1 by hand, the centering guide portion 10 at the tip of the snap ring assembling jig 1 is placed along the surface of the inserting portion 14, The snap ring 11 is inserted into the insertion portion 14, and the snap ring 11 is pushed by the pushing portion 6 to drop the snap ring 11 into the ring groove 15.

When the snap ring 11 is dropped into the ring groove 15, the snap ring 11 expands in the radial direction, and the outer peripheral portion 11a is fitted into the ring groove 15 as shown in FIG. Ring 11
The inner peripheral part 11b of the other part 13 is a flange part 16 at the end of the other part 13.
Then, the snap ring 11 is assembled by abutting against.

Further, by expanding the snap ring 11 in the radial direction, the snap ring protrusion confirmation portion 9 is inserted into the inner peripheral side of the snap ring 11, and the snap ring side stopper portion 7 is inserted into the ring groove 15 The component side stopper portion 8 abuts on the end face of the one component 12 while abutting on the snap ring 11 fitted in.

When the snap ring side stopper portion 7 abuts on the snap ring 11 and the component side stopper portion 8 abuts on the end face of one component 12,
It is confirmed that the snap ring 11 is assembled in the ring groove 15. At the same time, since the snap ring protrusion confirmation portion 9 enters the inner peripheral side of the snap ring 11, the protrusion of the snap ring 11 can be confirmed. As described above, the assembling of the snap ring 11 and the check of the imperfect insertion of the snap ring 11 are simultaneously performed.

[0018]

As described above, according to the present invention, the centering guide portion of the tip portion of the snap ring assembling jig is pushed along the inner surface portion of one of the parts to push the snap ring. At the pushing portion, the snap ring inserted in the inner surface portion of one component in a reduced diameter state can be pushed, and the snap ring can be dropped into the ring groove to assemble the snap ring.

Further, by dropping the snap ring into the ring groove, the snap ring expands in the radial direction, and the snap ring protrusion checking portion is inserted into the inner peripheral side of the snap ring to prevent the snap ring from protruding. Confirmation is performed, and the snap ring side stopper portion contacts the snap ring, and the component side stopper portion contacts one component, so that the snap ring is assembled in the ring groove.

As described above, the assembling of the snap ring and the checking other than visual inspection of the imperfect insertion of the snap ring can be performed at the same time.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional side view of a snap ring assembling jig according to the present invention.

FIG. 2 is a view from the direction A in FIG.

FIG. 3 is an enlarged view of part B in FIG.

FIG. 4 is an explanatory diagram of snap ring assembling using the snap ring assembling jig according to the present invention.

FIG. 5 (1) is an explanatory view immediately before assembling the snap ring. (2) is an explanatory view immediately after the snap ring is assembled.

FIG. 6 is an explanatory diagram of a conventional snap ring assembly.

[Explanation of symbols]

 2 Jig body 6 Snap ring pushing part 7 Snap ring side stopper part 8 Component side stopper part 9 Snap ring protrusion confirmation part 10 Centering guide part 11 Snap ring 12 One part 13 The other part 13 Ring groove

Claims (1)

[Claims] 1. A snap ring assembling jig for assembling a snap ring into a ring groove of an inner surface portion of one component for coupling two components of one and the other, wherein A snap ring pushing portion that pushes the snap ring in the reduced diameter state inserted into the inner surface portion of the component, and when the snap ring is assembled in the ring groove,
When the snap ring side stopper portion that hits the snap ring and the snap ring is assembled in the ring groove,
When a component side stopper portion that hits one component and the snap ring is assembled in the ring groove,
A snap ring assembly characterized in that a snap ring protrusion checking portion to be inserted on the inner peripheral side of the snap ring and a centering guide portion to be inserted into the inner surface portion of one of the parts to center the jig body are formed. Attachment jig.