JPH02303737A - Insertion of axis article and device therefor - Google Patents

Abstract

PURPOSE:To facilitate the work for fitting an axis article into a fitting hole at a proper posture by inserting an axis article into the fitting hole, in the state where the contact position between the axis article and a guide bar which can be shifted in reciprocation along the axial direction of the fitting hole is held at a constant position. CONSTITUTION:A communication hole 20a which communicates to the innermost parts of fitting holes 22 and 24 is formed on a block body 20 along the axial directions of the fitting holes 22 and 24. Then, a rod-shaped guide bar 12 inserted into the fitting holes 22 and 24 from the communication hole 20a is held inside the communication hole 20a so as to be shiftable in reciprocation along the axial directions of the fitting holes 22 and 24. The guide bar 12 and an axial article 50 are inserted into the fitting holes 22 and 24, in the state where the contact position between the guide bar 12 and the axis article 50 is held at a constant position. Thus, the axis article 50 in a proper posture can be easily fitted into the fitting holes 22 and 24 on the block body 20.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method and device for inserting a shaft object, which makes it possible to smoothly insert a shaft object into a fitting hole provided in a block body in an appropriate posture. Regarding.

[Prior Art] For example, when inserting and fitting a shaft object, such as a balancer shaft provided in a cylinder block of an automobile, into a fitting hole provided in a block body in an appropriate posture, a protrusion formed on the shaft object is used. It often happens that the part (in the case of a balancer shaft, the weight part) comes into contact with a bearing part or the like inside the block body, making it difficult to perform a smooth insertion operation.

For this reason, the reality is that there is no automation, and work relies on human intuition.

[Problems to be Solved by the Invention] Therefore, the production efficiency was poor, and since it relied on the intuition of the operator, there was also a problem in terms of reliability.

An object of the present invention is to previously drill a guide hole in a block body for inserting a shaft, insert a guide member into the guide hole, and engage the tip of the shaft with the guide member. It is an object of the present invention to provide a method and device for inserting a shaft object, which allows the shaft object to be guided and inserted, thereby smoothly inserting the shaft object into a fitting hole in an appropriate posture.

[Means for Solving the Problems] In order to achieve the above object, a shaft object insertion method according to the present invention includes a shaft object insertion method in which a shaft object is inserted in a predetermined posture into a fitting hole formed in a block body. After providing a communication hole in the block body along the axial direction of the fitting hole to communicate with the innermost part of the fitting hole, a rod-shaped guide bar inserted into the fitting hole from the communication hole is inserted in the axial direction of the fitting hole. The guide bar is held inside the communication hole so as to be able to reciprocate along the guide bar, and the shaft is inserted into the fitting hole while the abutment area between the guide bar and the shaft is held at a fixed position.

Further, the shaft object insertion device according to the present invention is a shaft object insertion device for inserting a shaft object in a predetermined posture into a fitting hole formed in a block body, and includes a rod-shaped guide bar, and the guide bar. a cylindrical first holding member that is slidable along the axial direction of the guide bar and that is fitted into the guide bar and has a protrusion formed on its outer peripheral surface; It has a shaft, and has a protrusion formed on its outer peripheral surface that comes into contact with the opening periphery of the communication hole, and a wavy step that can engage with the protrusion of the first holding member on its inner peripheral surface. , and a second holding member that can expand in the radial direction of the second holding member and come into contact with the inner surface of the communication hole, and is fitted onto the first holding member.

[Operation] In the shaft object insertion method according to the present invention, the shaft object is inserted into the fitting hole while the abutment portion between the guide bar and the shaft object is held in a fixed position.

Further, in the shaft object insertion device according to the present invention, the guide bar is the first
Since the guide bar is held by the holding member and the second holding member, the guide bar can reciprocate along the shaft direction of the fitting hole.

[Embodiments] Next, preferred embodiments of the shaft object insertion method and device according to the present invention will be described in detail based on the accompanying drawings.

1 and 2, reference numeral 10 indicates a shaft object insertion device according to the present invention, and one longitudinal end of this shaft object insertion device 10 is attached to a cylinder rod 30 of a cylinder (not shown). A rod-shaped guide bar 12 whose other end tip is formed into a conical shape, and a cylindrical first holding member 14 which is slidable in the axial direction of the guide bar 12 and is fitted into the guide bar 12. and a cylindrical second holding member 16 into which the first holding member 14 is inserted.

A flange-shaped projection 14 is provided on the outer peripheral side of the first holding member 14.
a and 14b are arranged in parallel at a predetermined distance in the axial direction of the first holding member 14, and a hole 13 is defined along the central axis thereof.

The second holding member 16 is composed of arcuate pieces 17 formed by dividing a cylindrical body into four along the axial direction, and a ring-shaped spring member 18 that biases the arcuate pieces 17 in a direction toward each other. The spring members 18 are housed in two @17a carved near both ends of the arcuate piece 17 in the longitudinal direction.

Each arc piece 17 has 1. An arcuate protrusion 17b is formed on the outer circumferential side, and a wavy RN 17e is formed on the inner circumferential side in correspondence with the protrusions 14a, 14b of the first holding member 14.

As understood from FIG. 3, the stepped portion 17c is formed by providing two tapered surfaces that protrude from the fixed end of the guide bar 12 toward the free end. Since the boundary portion of The extraction from the evil material 16 is prevented.

Further, when the top of the tapered surface formed on the second holding member 16 comes into contact with the protrusions 14a and 14b of the first holding member 14, the outer peripheral surface of the second holding member 16 touches the block body 20. The second holding member 1G is set to be in pressure contact with the inner circumferential surface of the formed communication hole 20a, and to be firmly fixed within the communication hole 2Oa.

In addition, in this embodiment, the second holding member 16 has four arcuate pieces 1.
7, but the number is not limited to this, and a configuration in which each arcuate piece 17 is formed by extending from the same cylindrical member is also suitable; in short, each arcuate piece 17 Any configuration is acceptable as long as it can be expanded and contracted along the radial direction of the communication hole 20a, and its outer circumferential surface is brought into pressure contact with the inner circumferential surface of the communication hole 20a when expanded.

Since the device 10 is configured as described above, the device 10
is attached to the communication hole 20a, that is, the protrusion 17b
is brought into contact with the opening periphery of the communication hole 20a, and the second
The circular arc piece 17, which is a component of the holding member 16, is connected to the communication hole 20.
When pressed against the inner peripheral surface of the guide bar 12, the guide bar 12 can reciprocate accurately along its own axial direction (the axial direction of the communication hole 20a).

Next, the cylinder block of the engine installed in the vehicle (
A method for inserting a balancer shaft (shaft object) into a block body using the device 10 will be explained.

First, the cylinder block 20 will be explained.

Inside the cylinder block 20 is a pair of balancer shaft bearings 50a formed on the balancer shaft 50.

Balancer shaft bearing holes (fitting holes) 22 and 24 are formed in which the balancer shafts 50b are respectively received.

Therefore, the balancer shaft bearing hole 22 is installed in the cylinder block 20.
After forming the communication hole 20a that communicates with the device 10, the device 10 is attached to the communication hole 20a.

Moreover, the axial direction of the communication hole 20H is the balancer shaft bearing hole 22.
It is set to match the axial direction of 24. The length of the conical tip of the guide bar 12 is set to such an extent that it protrudes from inside the balancer shaft bearing hole 24 to the outside of the cylinder block 20.
It becomes possible to fit into the center hole 50C formed in 0a.

In this state, the insertion bar 403 of the insertion cylinder 40 is fitted into the other center hole 5Qd formed in the balancer shaft 50, the insertion bar 40a is projected, and the guide bar 12 is retracted into the cylinder rod 30.

At this time, the conical tip of the guide bar 12 and the center hole 50
Since the guide bar 12 and the balancer shaft 50 are in a fitted state, the contact portion between the guide bar 12 and the balancer shaft 50 is held in a fixed position.

Therefore, the guide bar 12 is connected to the balancer shaft bearing holes 22 and 2.
4 (in the axial direction of the communication hole 20a), the balancer shaft 50 is inserted into the balancer shaft bearing hole 2.
2 and 24 while being guided along the axial direction;
As a result, the balancer shaft bearing portions 50a, 50b are each smoothly and properly supported in the balancer shaft bearing holes 22, 24.

After removing the cylinder rod 30 and the insertion cylinder 40 from the cylinder block 20, the communication hole 20a
Close the area with bolts, etc. to complete the work.

As described above, in this embodiment, the balancer shaft 50 is guided by the guide bar 12 that is movable back and forth along the axial direction of the balancer shaft bearing hole 22.24. Since the balancer shaft 50 is inserted, the work of expanding the balancer shaft 50 can be easily and efficiently performed.

This type of work can be automated by attaching the cylinder rod 30, insertion cylinder 40, etc. equipped with the device 10 to a manipulator, robot, etc. and synchronizing it with the flow of workpieces on the conveyor during engine assembly.

Note that the shaft object insertion method and device according to the present invention are not limited to the insertion work of the balancer shaft 50 inserted into the cylinder block 20, but can also be used when inserting a shaft object into a fitting hole formed inside the block body. It can be widely applied to

[Effects of the Invention] As can be understood from the above explanation, in the shaft object insertion method according to the present invention, the abutting region between the guide bar, which is movable back and forth along the axial direction of the fitting hole, and the shaft object is in a fixed position. Since the shaft is inserted into the fitting hole while being held, the shaft is inserted accurately along the axial direction of the fitting hole.

As a result, the work of fitting the shaft into the fitting hole in an appropriate posture can be easily performed, which further improves the efficiency of this type of work and the reliability of mounting the shaft.

Further, in the shaft object insertion device according to the present invention, the guide bar is the first
The holding member and the second holding member allow installation within the communication hole.

The first holding member is slidable along the axial direction of the guide bar, and since the first holding member and the second holding member have the same central axis, the center of the second holding member By matching the axial direction with the axial direction of the fitting hole, the guide bar can reciprocate along the axial direction of the fitting hole.

As a result, by inserting the shaft object into the fitting hole along the axial direction of the guide bar, the shaft object can be inserted along the axial direction of the fitting hole, so that the shaft object can be inserted into the fitting hole in an appropriate posture. The effect of being fitted is obtained.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a preferred embodiment of the shaft object insertion device according to the present invention, FIG. 2 is a perspective view showing the assembled state of the device shown in FIG. 1, and FIG. 3 is a main part of the device shown in FIG. FIG. 4 is an explanatory diagram showing a preferred embodiment of the shaft object insertion method according to the present invention. 10... Shaft insertion device 12... Guide bar 1
4...First holding member 14a, 14b...Protrusion 16...Second holding member 17...Circular piece 1
8... Spring material 20... Cylinder block (block body) 20a.
・Communication hole

Claims (3)

[Claims] (1) In a shaft object insertion method in which a shaft object is inserted in a predetermined posture into a fitting hole formed in a block body, a communicating hole that communicates with the innermost part of the fitting hole is blocked along the axial direction of the fitting hole. After being installed in the body, a rod-shaped guide bar inserted into the fitting hole from the communicating hole is held inside the communicating hole so as to be movable back and forth along the axial direction of the fitting hole, and a contact portion between the guide bar and the shaft is provided. A method for inserting a shaft object, comprising: inserting the shaft object into a fitting hole while the shaft object is held in a fixed position. (2) A shaft object insertion device for inserting a shaft object in a predetermined posture into a fitting hole formed in a block body, the device comprising: a rod-shaped guide bar; and a guide bar that slides along the axial direction of the guide bar. a cylindrical first holding member that is movable and fitted to the guide bar and has a protrusion formed on its outer circumferential surface; A protrusion that comes into contact with the opening periphery of the communication hole is formed, and a wavy stepped part that can engage with the protrusion of the first holding member is formed on the inner circumferential surface, and A shaft object insertion device comprising: a second holding member that can be expanded to come into contact with the inner surface of the communication hole and fitted onto the first holding member. (3) The shaft object insertion device according to claim 2, wherein the block body is a cylinder block and the shaft object is a balancer shaft.