JPH06779A - Bearing extracting method, fitting method, and its device - Google Patents

Abstract

PURPOSE:To surely and efficiently perform the coupling and extracting work of a bearing to a shaft. CONSTITUTION:A rod 3 reciprocatable with an expanding/shrinking mechanism 2 is arranged at the center on one end side of a machine frame 1, a hook hole member 4 is fixed at the center on the other end side, and a bearing A is received by the hook hole member 4 to face the rod 3. When the bearing A is to be extracted from a shaft B, the one end face of the shaft B is pressed to the rod 3 while the shaft B is inserted into the center hook hole 5 of the hook hole member 4, and the shaft B is retreated from the bearing A. When the bearing A is to be coupled with the shaft B, the shaft B is arranged between the bearing A received by the hook hole member 4 and the rod 3, the one end face is pressed by the rod 3, and the shaft B is inserted into the bearing A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for removing a bearing from a bearing mounting shaft and an apparatus for carrying out the method.

[0002]

2. Description of the Related Art Conventionally, as a device for extracting a bearing mounted on a shaft, for example, a rod body, which can be advanced and retracted by a screw mechanism or a cylinder, is mounted in a central portion of a horizontal rod while being inserted into the rod body. A state in which a hook body is pivotally attached to both ends of a horizontal rod at the center, and the hook body is locked to both rear surfaces of a bearing fitted to a shaft, and the tip of the rod body is brought into contact with the end face of the shaft. Then, by pushing the rod body forward, the bearing is pulled out while being relatively moved to the shaft end side. On the other hand, in order to fit the bearing to the shaft, a means of applying the bearing to the shaft end and pushing it with an appropriate tool is adopted.

[0003]

However, according to the above-mentioned bearing extracting device, even if the rod body is brought into contact with the shaft end, the left and right hook bodies with respect to the bearing are different depending on the size of the extension length of the rod body. Since the positions of the left and right hooks change, it is necessary to adjust these left and right hook bodies so that they can be locked to the back surface of the bearing, and the work is troublesome and time-consuming. Further, this device cannot mount the bearing on the shaft.

Therefore, although the work of mounting the bearing is performed by the above means, it is difficult to hold the shaft, align the bearing with respect to the shaft, maintain the aligned state, and the like. However, the current situation is that the bearing is manually driven into the shaft, which causes problems such as poor work efficiency and poor mounting accuracy. SUMMARY OF THE INVENTION It is an object of the present invention to provide a bearing withdrawing and mounting method and a device for carrying out the method, which can solve the above problems.

[0005]

In order to achieve the above object, in the bearing extracting method of the present invention, first, the bearing is mounted on one end side of the machine frame so as to be opposed to the axial center of the rod. The bearing mounting shaft is inserted through the locking hole of the locking hole member fixed to the other end of the frame, and the bearing mounted on the bearing mounting shaft is made to face the rod so that the front side of the locking hole. To accept. Then, the rod is moved forward to push the bearing mounting shaft to push out the bearing from the bearing mounting shaft.

Further, according to the bearing mounting method of the present invention, as described in claim 2, first, the bearing is mounted so as to face the axial center of the rod mounted on one end side of the machine frame so as to be movable back and forth. A bearing is received on the front side of the locking hole of the locking hole member fixed to the other end of the frame, and a shaft is provided between the bearing and the rod, and the axis of the shaft matches the center of the bearing. It is placed in the state where it was made. After this state, one end face of the shaft is pushed by the forward movement of the rod to insert the bearing into the other end of the shaft.

Further, as an apparatus for carrying out the above method, as described in claim 3, a rod which is movable back and forth by a screw mechanism or a cylinder is provided at one end of the machine frame, and the rod is moved. At the other end of the machine frame on the shaft center extension of, a locking hole member having a locking hole with a diameter smaller than the bearing and larger than the bearing mounting shaft is fixed in the center,
A bearing mounting shaft support member is disposed between the locking hole of the locking hole member and the rod or on the back side of the locking hole member, and the bearing mounting shaft support member and the machine frame are axially aligned. It is characterized in that it is configured to be relatively movable.

[0008]

[Operation] When the bearing is pulled out, the bearing mounting shaft is inserted into the locking hole of the locking hole member that is fixed to the other end of the machine frame, and the back surface of the bearing fitted to the shaft is locked. After making contact with and receiving the front of the hole member and supporting the shaft on the same center line as the locking hole by the support member, the rod installed on one end side of the machine frame is pressed to a predetermined pressure. When extended, the rod pushes the end face of the shaft and pushes the shaft in its longitudinal direction. At this time, since the bearing fitted to the shaft is fixed at that position by the locking hole member, only the shaft moves while sliding on the inner surface of the bearing, and the shaft end passes through the locking hole. Sometimes the bearing will separate from the shaft end.

When the bearing is mounted on the shaft, the bearing is arranged on the front side of the locking hole member to hold it in a state of communicating with the locking hole, and the supporting member supports the shaft to expand and contract with the bearing. It is disposed between the rod and the rod with both end surfaces thereof facing the rod and the bearing. Then, when the rod is extended with a predetermined pressure, one end face of the shaft is pressed by the rod and pushed in the axial direction, and the other end of the shaft is inserted into the bearing.

[0010]

Embodiments of the present invention will now be described with reference to the drawings.
1 is both side frame members 1a, 1a having the same length with a certain width interval
A machine frame in which the other end portions of the are fixed by a horizontal frame member 1b,
A rod expanding / contracting mechanism 2 having a rod 3 that can move back and forth in the central length direction of the machine frame 1 is fixed to one end side thereof, and is opposed to the other end side in the axial extension of the rod 3. The locking hole member 4 provided with the locking hole 5 is fixed.

The rod expanding / contracting mechanism 2 has a screw rod 6 threaded through the center of a fixed rod 12 whose both ends are detachably fixed to both side frame members 1a of the machine frame 1 and the screw. The base end portion of the hydraulic cylinder 7 is rotatably connected to the tip of the rod 6 via a joint. The piston rod of the hydraulic cylinder 7 constitutes the rod 3 described above. 7 is removed from the tip of the screw rod 6
When the expansion mechanism 2 is configured by only the tip end portion of the screw rod 6 becomes the rod 3. The base end portion of the screw rod 6 is a square shaft portion 6a.
A socket body (not shown) is fitted on the square shaft portion 6a, and a handle or the like integrated with the socket body is rotated to move the screw rod 6 forward and backward in the longitudinal direction. Is configured. The hydraulic cylinder 7 is pipe 17
Connected to a hydraulic pump 27 installed in place via
It is operated by this hydraulic pump 27.

As shown in FIG. 6, the engaging hole member 4 disposed on the other end side of the machine frame 1 so as to face the rod extending / contracting mechanism 2 has a pair of left and right opposite end surfaces cut out in an arc shape. Split piece
4a, 4a, and the engaging hole 5 is formed by the arcuate notch spaces 5a, 5a of the divided pieces 4a, 4a. The upper and lower ends of the divided pieces 4a, 4a are integrally provided with screw cylinders 4b, 4b which are screwed into screw rods 8, 8 which are vertically arranged side by side at regular intervals. Is formed on the left and right screws, and the left and right split pieces 4a are rotated by the rotation of the screw rods 8, 8.
The diameter 4a of the locking hole 5 can be adjusted by contacting and separating from the center of the screw rods 8, 8. Further, both ends of the upper and lower screw rods 8 and 8 are rotatably supported by bearing members 9 and 9, and these bearing members 9 and 9 can be detachably attached to both side frame members 1a and 1a of the machine frame 1. It is stuck. Also, the divided piece 4a,
On the front surface of 4a (the surface facing the rod 3), a V-shaped bearing holding step portion 4c is formed so as to surround the arc-shaped cutout space portion 5a.
Is projected. It should be noted that instead of the upper and lower screw cylinders of the split pieces 4a, 4a, a cylinder may be slidably fitted in the screw rod 8 and fixed at a desired position by a nut screwed to the screw rod 8. Also, other means may be adopted.

Reference numeral 10 is a shaft support member, and a jack is mounted on a support base 11.
13 is attached, and a V-shaped shaft support piece is attached to the upper end of the jack 13.
The jack 13 is integrally provided with a jack 13, and the adjustment screw rod 15 is screwed between both side pivot parts of a pantograph mechanism formed by a combination of upper, lower, left and right links to rotate the adjustment screw rod 15. Although the height of the support piece 14 can be adjusted by movement, a vertical expansion / contraction mechanism capable of appropriately adjusting the height may be employed instead of such means.

Reference numerals 18 and 19 denote carriages that are detachably fixed to the lower surfaces of both ends of the machine frame 1, and support the machine frame 1 in a state of floating above the installation surface by a certain height. These trolleys 18 and 19 are fixed legs without wheels,
Wheels may be provided on the lower surface of the support base 11 of the shaft support member 10. In short, the machine frame 1 and the support member 10 are connected to each other.
It suffices if it is configured to be relatively movable in the length direction of. The reference numeral 21 designates a gate-shaped handle fixed to the carriage 18 on one end side, which is used when the machine frame 1 is transported, moved, or the like.

Further, the both side frame members 1a, 1a of the machine frame 1 are provided with mounting holes 20, 20 ... At regular small intervals in the length direction, and the desired mounting holes 20 are provided in the desired mounting holes 20. Both ends of the fixed rod portion 12 of the expansion / contraction mechanism 2 and the bearing members 9 of the screw rods 8 in which the locking hole members 4 are arranged are detachably fixed by bolts and nuts 22.

A method of extracting the bearing A fitted to the shaft B of the motor coil C and a method of fitting the bearing A to the shaft B by using the bearing attaching / detaching device thus constructed will be described. . First, in order to fit the bearing A into the shaft B, as shown in FIGS. 1 to 3, the upper and lower screw rods 8, 8 provided on the other end side of the machine frame 1 are rotated to operate the locking member 4. The left and right divided pieces 4a, 4a of the left and right divided pieces 4a, 4a are brought close to each other, and the left and right divided pieces 4a, 4a are projectingly provided on the front surface of the dogleg-shaped holding step portion 4
The bearing A is clamped by c and 4c, and the back surface of the bearing A is received by the front surfaces of the split pieces 4a and 4a.

The center of the bearing A sandwiched by the sandwiching stepped portions 4c, 4c of the split pieces 4a, 4a is the center of the locking hole 5 formed between the arcuate space portions 5a, 5a of the split pieces 4a, 4a. And the locking hole 5 has a larger diameter than the central hole of the bearing A. In parallel with the work of disposing the bearing A, a pair of front and rear shaft support members 10, 10 are disposed in the space of the machine frame 1 between the rod 3 of the expansion mechanism 2 and the locking hole member 4, and these support members are provided. Both ends of the shaft B are mounted between the shaft support pieces 14 and 14 of the shafts 10 and 10, and the arrangement positions of the support members 10 and 10 and the height positions of the shaft support pieces 14 and 14 are adjusted. Is aligned with the center line of the rod 3 and the locking hole 5. Axis B
It is preferable from the viewpoint of work that both end surfaces of the rod are close to the bearing A and the rod 3, and therefore, the mounting position of the fixed rod portion 12 of the rod extension mechanism 2 and the attachment of the locking hole member 4 to the machine frame 1 At least one of the position and the position is adjusted in advance.

When the bearing A and the shaft B are thus arranged, the hydraulic cylinder 7 which is the expansion / contraction mechanism 2 is then actuated to move the rod 3 forward and extend.
After the tip end surface of the shaft abuts on one end surface of the shaft B, the shaft B is pressed in the longitudinal direction and the other end is fitted into the bearing A.
As the other end of the shaft B is inserted into the bearing A, the machine frame 1 retracts via the bogies 18 and 19, and the bearing A
When is inserted into a predetermined portion of the shaft B, the extension operation of the rod 3 is stopped. The bearing A is sandwiched between the split pieces 4a, 4a of the locking hole member 4. However, the bearing A is preliminarily attached to the other end of the shaft B without providing the clamping step 4c in the locking hole member 4. The rod 3 is slightly fitted, and in this state, the shaft B is mounted on the shaft support members 10 and 10 and the bearing A is brought into contact with and received by the front side of the locking hole member 4 and the rod 3
The work of fitting the bearing A may be performed by the pushing force of.

Next, a method of extracting the bearing A from the shaft B will be described. As shown in FIG. 4, first, the bearing members 9 of the screw rods 8 and 8 provided with the locking hole members 4 are attached to both sides of the machine frame 1. The frame member 1a is fixed near the center of the frame member 1a, and the locking hole 5 formed between the split pieces 4a of the locking hole member 4 is brought close to the rod 3 of the expansion / contraction mechanism 2. Next, the shaft support members 10, 10 are installed in the space portion of the machine frame 1 on the back side of the locking hole member 4 in the same manner as described above, and the shaft support pieces 14,
After mounting the bearing mounting shaft B on 14 and making one end of the shaft B mounting the bearing A project to the rod 3 side through the split pieces 4a, 4a of the locking hole member 4, , The two divided pieces 4a, 4a are moved closer to each other in the direction in which the shaft B is sandwiched, and the bearing A is received on the front side thereof.

After this state, as shown in FIG.
When the rod 3 is extended to press the one end surface of the shaft B, the bearing A fitted to the shaft B is retracted in the longitudinal direction only in the shaft B while the locking hole member 4 is received. Bearing A
Is relatively moved to one end side of the shaft B and is withdrawn from the shaft B. In the above embodiment, the mounting positions of the rod expanding / contracting mechanism 2 and the locking hole member 4 can be changed with respect to the machine frame 1. At least one of them may be integrally fixed to a predetermined position of the machine casing 1. Also, the locking hole member 4 is composed of left and right divided pieces 4a, 4a, and these divided pieces 4a, 4a are configured to be brought into contact with and separated from each other via a screw mechanism. Alternatively, a large or small locking hole member having a circular hole through which the shaft B can be inserted or a U-shaped hole whose upper end is opened may be replaceably fixed to the central portion in the width direction of the machine frame 1.

[0021]

As described above, according to the present invention, the locking hole member is fixed to the other end side of the machine frame so as to face the axial center of the rod mounted on one end side of the machine frame so as to move back and forth. Since the bearing is received on the rod-side facing surface of the locking hole member, the shaft is disposed between the locking hole member and the rod, and then one end surface of the shaft is fixed by the rod. By pressing, the other end of the shaft can be reliably and efficiently fitted into the bearing.

Further, when the bearing is pulled out from the shaft, the shaft is inserted into the locking hole of the locking hole member so that the bearing is received by the rod-side facing surface of the locking hole member. By pressing the shaft end by the rod, the bearing can be smoothly moved to the shaft end side and easily withdrawn.

Further, the bearing attaching / detaching device of the present invention includes a rod disposed on one end side of the machine frame so as to be able to move forward and backward, a locking hole member fixed on the other end side, and a support member for supporting the bearing mounting shaft. Since it has a simple structure consisting of and, it is easy to carry, operate and handle, and even if there is only one worker, it is possible to attach and detach the bearings efficiently. In addition, the work can be performed safely, and even if the shaft is equipped with a motor coil or the like, the bearing can be attached / detached to / from a predetermined position of the shaft end in the mounting form.

[Brief description of drawings]

FIG. 1 is a plan view showing a state where a bearing is fitted,

FIG. 2 is a side view thereof,

FIG. 3 is a simplified enlarged view showing a state immediately before fitting.

FIG. 4 is a plan view showing a state where the bearing is being extracted,

FIG. 5 is a simplified enlarged view of a main part thereof,

FIG. 6 is a front view of a locking hole member.

[Explanation of symbols]

 1 Machine frame 2 Telescopic mechanism 3 Rod 4 Locking hole member 5 Locking hole 10 Shaft support member

Claims (3)

[Claims] 1. A bearing is installed in the locking hole of a locking hole member fixed to the other end of the machine frame so as to face the axial center of a rod mounted on one end side of the machine frame so as to move forward and backward. By inserting the shaft into the bearing mounting shaft, the bearing mounted on the bearing mounting shaft is opposed to the rod so as to be received on the front side of the locking hole, and in this state, the rod is advanced to push the bearing mounting shaft to advance the bearing. A bearing extraction method characterized by extracting the bearing from the mounting shaft. 2. A front side of the locking hole of a locking hole member fixed to the other end side of the machine frame so as to face the axial center of a rod mounted on one end side of the machine frame so as to move back and forth. The bearing is received by the shaft, and the shaft is arranged between the bearing and the rod with the axis of the shaft aligned with the center of the bearing. Then, one end face of the shaft is pressed by advancing the rod. A bearing mounting method, characterized in that a bearing is inserted into the other end of the shaft. 3. A rod which is movable back and forth by a screw mechanism or a cylinder is arranged at one end of the machine frame, and at the other end of the machine frame on the extension of the axial center of the rod, the diameter is smaller than that of the bearing in the center and A locking hole member provided with a locking hole having a diameter larger than that of the bearing mounting shaft is fixed, and the bearing is provided between the locking hole of the locking hole member and the rod or on the back side of the locking hole member. A bearing extracting / mounting device, characterized in that a mounting shaft supporting member is disposed, and the bearing mounting shaft supporting member and the machine frame are configured to be relatively movable in the axial direction.