JPH0220857B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method and apparatus for press-fitting a bushing or bearing into a housing.

(Prior art) Conventionally, when press-fitting a bushing into a housing, the housing is installed on a base, and with the bushing placed on top of the housing, a flanged core metal is inserted into the bushing, and the center of the housing is aligned. After aligning the centers of the bushings, the core metal is pressed with a push rod to press fit the bushing into the housing.

In addition, as another method of press-fitting that does not use a core metal,
After the housing is installed on the base and the bushing is fitted into the push rod, the push rod is lowered and the bushing is press-fitted into the housing.

(Problems to be Solved by the Invention) According to the prior art described above, various inconveniences occur when a flanged core bar is used. In other words, it is difficult to achieve concentricity between the housing and the bushing, the top or bottom surface of the housing must be horizontal, and the bushing tends to fall over when inserting the core with the bushing placed on the top of the housing. The second problem is that the bush may be damaged if it is press-fitted in an inclined state, and the workability is not good.

In the prior art, when no core metal is used,
It is necessary to prevent the bushing from falling from the push rod, and it may be difficult to achieve concentricity between the housing and the bushing.

(Means for Solving the Problems) According to one aspect of the present invention, there is provided a method for press-fitting a bushing or a bearing into a housing, the core metal being pressed by an elastic member being inserted into a hole in the housing and a hole in the bushing or bearing. the step of inserting;
and a method of press-fitting a bushing or bearing into a housing, the method comprising the step of press-fitting the bushing or bearing into a hole in the housing by pressing the core metal and the bushing or bearing with a push rod against the pressing force of the elastic member. provided.

According to another aspect of the invention, an apparatus for press-fitting a bushing or bearing into a housing is provided,
This device includes a base in which a hole is formed, a bearing pin disposed in the hole, an elastic member that constantly presses the bearing pin upward, and a housing and a bush or a bearing placed on the bearing pin. It includes a core metal having a stepped portion that fits into each inner hole, and a push rod that is disposed opposite to the core metal and is reciprocated in the axial direction of the core metal.

(Embodiment) Referring to FIG. 1, there is shown a device 10 for press-fitting a bushing B or a bearing into a housing H according to a first embodiment of the present invention. Assembly 1,
The assembly includes an eccentric 3 fixed to the output shaft 2, a bearing 4 attached to the eccentric, a connecting rod 5 attached to the bearing, and a pivot 8 fixed to the casing. , a first link 6 connected at its other end to the conrod 5 by a pin 9, a second link 7 connected at one end to the conrod and the first link by the pin 9, and one end connected to the second link by a pin 11. A lever 12 is connected to the lever 12 so as to swing around a pivot shaft 13 fixed to the casing, and has a bearing 14 attached to the other end, a push rod 15 that is pressed against the bearing, and a lever 15 that is connected to the push rod via a nut. a headed bolt 16 adapted to be screwed;
A core metal 17 facing this push rod, an adapter plate 18 surrounding this core metal, a base 19 on which this adapter plate is placed, a support pin 21 arranged in a hole 19a formed in this base, and a support pin 21 placed in a hole 19a formed in this base, It includes an attached stop 22, a spring 23 sandwiched between the stop and the bearing pin, and a locating stop 24 for positioning the adapter plate.

Here, the push rod 15 and the bearing 14 are in rolling contact, but in order to always ensure the rolling contact without separating from each other, the spring 25 is attached to the bearing 14 with a pin 14a and a pin 15a of the push rod 15.
Provided between. The headed bolt 16 is screwed into a threaded hole in the push rod 15 via a nut. This is the head bolt 16 from the push rod 15, matching the length of the housing H and the length of the bushing B.
This is to adjust the protruding length of the bolt and fix it with a nut.

In a preferred embodiment of the present invention, operation switches are provided on both sides of the casing, and the operation circuit starts operation when either one of the operation switches is pressed, and operates between the start of press-fitting of the bush and the completion of press-fitting. When you release the switch, operation will stop and
When the operation switch is released after press-fitting is completed, the push rod stops at the uppermost position, and even if the operation switch is continued to be pressed, the push rod remains at the uppermost position. Further, if either one of the operation switches is held down, operation will not be performed.

In operation, when press-fitting the bushing B into the housing H, the adapter plate 18 is positioned in line with the housing H and the positioning stopper 24 is pressed.
Fix it by. As shown in Figure 2, Bushi B
is inserted into the stepped portion of the core bar 17, and then the motor and reducer assembly 1 is electrically energized. This drives the conrod 5, and this movement is caused by the shaft 8
This is converted into a swinging movement about the lever 12 around the pivot 13 via the second link 7.
It can be changed into a rocking motion. The movement of the lever 12 is
The force is transmitted to the push rod 15 via the bearing 14, thereby causing the push rod 15 to reciprocate in the vertical direction. When the push rod 15 descends, the core bar 1 into which the bushing B is fitted
7 is pushed into the housing H as shown in FIG. 3, and the bushing B is press-fitted into the housing H.
When the push rod 15 rises, the core bar 17 is pushed up by the spring 23 via the support pin 21, as shown in FIG. In this state, the housing H into which the bushing B has been press-fitted is removed from the core bar 17 by hand or using a pick-up device (not shown) (see FIG. 5).

Referring to FIGS. 6 to 8, the second embodiment of the present invention
An apparatus 100 for press-fitting a bushing B or a bearing into a housing H according to an embodiment is shown, and hereinafter the first
Only the parts that are different from the device 10 of the embodiment will be explained. Referring to FIG. 6, motor and reducer assembly 101 secured to casing 120
A cam 103 is fixed to the output shaft 102 with a key or the like. The intermediate rod 106 is installed in the casing 120 so as to be able to reciprocate in the vertical direction, and has a first bearing 104 pivotally supported on a first pin 105 fixed near one end of the intermediate rod 106 . It is designed to roll into contact with the A lever 11 configured to swing around a pivot 113 fixed to a casing 120
2 has a second pin 109 and a third pin 111 fixed near both ends thereof, and the second pin 109 connects the second bearing 110 to the third pin 111.
The pin 111 pivotally supports a third bearing 114. The first tension spring 107 is connected to a pin 106a fixed to the intermediate rod 106 and a second pin 1
09, so that the second bearing 110 is always brought into rolling contact with the intermediate rod 106. Referring to FIG. 8, the third tension spring 125 is provided between a pin 115a fixed to the push rod 115 and a pin 126 fixed to the frame 120a of the casing. rolling contact with the bearing 114 is always maintained.

In operation of the second embodiment of the device 100, when the motor rotates, the cam 103 rotates, thereby causing the intermediate rod 106 to move in the vertical direction.
The lever 112 swings around the pivot 113 to move the push rod 115 up and down, thereby press-fitting the bush or bearing B into the housing H as in the first embodiment.

In the present invention, a slider mechanism or the like may be employed as the mechanism for driving the push rods 15, 115.

(Effects of the Invention) The device of the present invention has a simple boosting mechanism for press-fitting, is easy to operate, and is safe. In other words, concentricity is ensured by simply fitting the housing and bushing onto the core metal, and no skill is required, and the device can be operated simply by operating the operating switch.

In addition, since an electric motor is used as the drive source, it is possible to eliminate contamination caused by oil leaks, contamination caused by compressed air exhaust mist, and noise that would occur when using hydraulic or pneumatic pressure. You are free to choose the location.

[Brief explanation of drawings]

FIG. 1 is a schematic sectional view of a press-fitting device according to a first embodiment of the present invention, FIGS. 2 to 4 are diagrams showing the steps of press-fitting a bushing into a housing, and FIG. 5 is a diagram showing a housing into which a bushing is press-fitted. A sectional view, FIG. 6 is a schematic sectional view of a press-fitting device according to a second embodiment of the present invention,
7 is a diagram showing a drive mechanism employing a cam in the device shown in FIG. 6, and FIG. 8 is a diagram showing the related structure of the push rod and lever in the device shown in FIG. 6. In the figure, B...Bushing, H...Housing, 10,100...Press fitting device, 15,115...
...Push rod, 17...Core metal, 19...Base, 21...
...Support pin, 23...spring.

Claims (1)

[Claims] 1. A method for press-fitting a bushing or a bearing into a housing, including the steps of inserting a core bar pressed by an elastic member into a hole in the housing and a hole in the bushing or bearing, and resisting the pressing force of the elastic member. A method for press-fitting a bushing or bearing into a housing, the method comprising the step of press-fitting the bushing or bearing into a hole in the housing by pressing the core metal and the bushing or bearing with a push rod. 2. A device for press-fitting a bushing or a bearing into a housing, which includes a base formed in a hole, a support pin placed in the hole, an elastic member that constantly presses the support pin upward, and a resilient member placed on the support pin. a core metal having a stepped portion that engages with each inner hole of the housing and the bush or bearing; a push rod that is disposed opposite to the core metal and reciprocates in the axial direction of the core metal; and the push rod. A device that press-fits a bushing or bearing into a housing, including a drive mechanism that drives it.