JPH0364839B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to rotation control when a rotation shaft is provided with a rotation prevention pin for connecting parts such as gears and rollers in a relatively non-rotatable manner. This invention relates to a method for assembling a shaft into a support plate.

[Prior art] As a structure for connecting components such as gears and rollers to a rotating shaft in a relatively non-rotatable manner, a rotation stop pin (spring pin) is press-fitted into the shaft, and this pin is connected to the sleeve of the gear or roller. A structure is known that engages with a groove formed in the.

[Problems to be Solved by the Invention] When such a rotation prevention structure is adopted, conventionally, the pin has to be press-fitted after the rotating shaft has passed through the bearing of the support plate. For this reason, it is difficult to press-fit the pins because there is not enough space, and it is necessary to prepare a special jig for press-fitting the pins. Furthermore, because the pin press-fitting was performed after the rotating shaft had passed through the bearing of the support plate, parts surrounding the shaft could not be assembled in advance, resulting in poor assembly efficiency. Of course, the workability was extremely poor when disassembling, repairing, and replacing parts.

Therefore, when adopting a structure in which parts such as gears and rollers are made non-rotatable relative to the rotating shaft via a rotation stopper pin, the present invention aims to incorporate the rotating shaft into the support plate and the parts around the shaft. The purpose is to make it easy to incorporate.

[Means for Solving the Problems] In the present invention, a bearing and a detent pin are attached to a rotating shaft in a pre-assembly process. The bearing includes a ring body having a bearing hole, a flange portion protruding from the outer periphery of one end of the ring body, and a flange portion protruding from the outer periphery of the ring body with an interval corresponding to at least the thickness of the flange portion and the support plate. It has a locking tongue. on the other hand,
The support plate includes a support hole into which the outer peripheral surface of the ring body of the bearing can fit and through which the flange cannot pass;
A notch is provided in a part of the support hole so as to allow the locking tongue and the locking pin to pass therethrough. The rotating shaft, on which the bearing and detent pin have been installed in the pre-assembly, is inserted from one end thereof, and at this time, the detent pin and the locking tongue of the bearing are aligned with the notch in the support plate and passed through. After passing the rotating shaft through the shaft until the flange of the bearing is in contact with the support plate, the bearing is rotated so that the locking tongue comes out of the notch. As a result, the bearing is captured by the support plate and cannot be moved in the axial direction. Thereafter, parts such as gears and rollers are passed through the rotating shaft, and their split grooves are engaged with the rotation stop pins to connect the parts and the rotating shaft in a relatively non-rotatable manner. Finally, the rotating shaft is passed through another support plate from the end. As a result, the rotating shaft is supported by the two support plates.

[Function] Therefore, according to the present invention, the rotating shaft can be assembled into the support plate while the rotation stopper pin is press-fitted into the rotating shaft, or vice versa, the rotating shaft can be removed from the support plate. I can do it.

[Example] Fig. 1 shows the final assembled state. The rotating shaft 10 is rotatably supported by bearings 40 and 50 mounted on two support plates 20 and 30. As clearly shown in FIG. 2, the bearing 40 has a bearing hole 41 into which the rotating shaft 10 is rotatably fitted.
a ring body 42 with
and locking tongues 44, 44 protruding at intervals corresponding to the thickness of the support plate 30 (the lower locking tongue 44 is hidden and cannot be seen in FIG. 2); A hemispherical small protrusion 4 is provided on the inner surface of the locking tongue piece 44.
5 is protruding. The notch 46 provided in the flange portion 43 is simply formed as a result of the plastic molding of the bearing 40.
On the other hand, as shown in FIG. 3, the support plate 20 has a support hole 21 and notches 22 and 23 connected thereto.
and a small hole 24. The ring body 42 can be fitted into the support hole 21, but the flange portion 43 cannot pass therethrough. The notches 22 and 23 allow locking tongues 44 and 44 and a detent pin to be described later to pass therethrough. A small protrusion 45 of the locking tongue piece 44 can be engaged with the small hole 24 . The procedure for assembling the bearing 40 into the support plate 20 will be explained later.

The support plate 30 and the bearing 50 are substantially the same as the support plate 20.
Since it has the same structure as the bearing 40, the explanation will be omitted.

A gear 60 is connected to the rotating shaft 1 between the support plates 20 and 30.
It is non-rotatably connected to 0 with the following structure. A slot 62 is formed in the sleeve 61 of the gear 60, and a detent pin 71 press-fitted into the rotating shaft 10 is engaged with the slot 62. gear 60
Movement to the right is restricted by a retaining ring 72 such as an E-ring. Further, a gear 80 is fixed to the left end of the rotating shaft 10 via a detent pin 73 and a retaining ring 74. Note that the movement of the rotating shaft 10 to the left and right is regulated via a pair of retaining rings 75 and 76 attached to the rotating shaft 10 at positions on both sides of the bearing 40.

Next, the assembly procedure will be explained with reference to FIG. First, perform the following assembly as pre-assembly. The bearing 40 is fitted onto the rotating shaft 10, and the retaining ring 75 on the left side of the bearing 40 is attached to the rotating shaft 10. Press-fit the detent pins 71 and 73 into the rotating shaft 10, insert the gear 80 from the left end by aligning the split groove 81 with the pin 73, and then attach the retaining ring 74 to the rotating shaft 10.
Prevents the gear 80 from slipping off to the left. After performing such pre-assembly, the rotary shaft 10 and its right end are passed through the support plate 20. At this time, by aligning the pin 71 and the locking tongue piece 44 of the bearing 40 with the notch 22 of the support hole 21 of the support plate 20, the rotating shaft 1
0 can be inserted until the flange portion 43 of the bearing 40 touches the left side surface of the support plate 20.
In this state, the ring body 42 is fitted into the support hole 21, and then the bearing 40 is rotated to engage the small protrusion 45 of the other locking piece 44 with the small hole 23 (FIG. 3) of the support plate 20. let With this, the bearing 40 is attached to the support plate 20.
, and free rotation is also restricted. Thereafter, the gear 60 is inserted into the rotating shaft 10 from its right end, and the split groove 62 is engaged with the pin 71. Thereby, the gear 60 is connected to the rotating shaft 10 so as to be relatively non-rotatable. and retaining ring 76,
72 is attached to the rotating shaft 10, the right end portion of the rotating shaft 10 is supported by the bearing 50 of the support plate 30. The support plates 20 and 30 are fixed in parallel via pillars and screws (not shown).

To take out only the rotating shaft 10 for parts replacement or overhaul, remove the retaining rings 76 and 72, and then hold the bearing 40 so that its retaining tongue 44 faces the notch 22 of the support plate 20. When the rotating shaft 10 is rotated so that the pin 71 also faces the notch 22, the rotating shaft 10 can be pulled out without removing the support plates 20, 30.

The above-mentioned embodiment has been described merely as an example of the integration method according to the present invention, and various modifications can be made without departing from the technical idea of the present invention. For example, after the rotating shaft 10 is assembled, the retaining rings 75 and 76 on both sides of the bearing 40 are used to prevent the rotary shaft 10 from coming off after it has been assembled. This can also be done by attaching a retaining ring to the rotating shaft 10. Furthermore, regarding the retaining ring 72 for positioning the gear 60, if an elastic claw is integrally formed on the right side of the gear 60 and a snap locking structure is adopted in which the elastic claw is engaged with the groove of the rotating shaft 10, the retaining ring 72 can be stopped. The ring 72 can also be omitted. Furthermore, the fixing structure of the gear 80 on the left end of the rotating shaft 10 and the mounting structure of the bearing 50 on the support plate 30 are irrelevant to the subject matter of the present invention. For example, the bearing 50 may be fixed to the support plate 30 by press fitting or caulking, or the bearing 50 may be omitted and the rotating shaft 10 may be directly supported by the support plate 30.

[Effects of the Invention] According to the assembling method of the present invention detailed above, it is possible to assemble the rotating shaft into the support plate even if the locking pin is attached to the rotating shaft in advance in the pre-assembly stage. Many of the surrounding parts can be pre-assembled. Therefore, assembly efficiency is increased and assembly costs can be reduced. Also,
On the other hand, since the rotating shaft can be taken out with the locking pin still attached, it is easy to disassemble, repair, and replace parts.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing the final assembled state, FIG. 2 is a perspective view of the bearing, FIG. 3 is a front view of the support plate, and FIG. 4 is a developed plan view. DESCRIPTION OF SYMBOLS 10... Rotating shaft, 20... Support plate, 21... Support hole, 22... Notch, 30... Another support plate, 4
0... Bearing, 41... Bearing hole, 42... Ring body, 43... Flange portion, 44... Locking tongue piece, 6
0...Parts (gear), 62...Split groove, 71...
Rotating pin.

Claims (1)

[Scope of Claims] 1. A ring body having a bearing hole, a flange portion protruding from the outer periphery of one end thereof, and an outer periphery of the ring body with an interval corresponding to at least the thickness of the support plate between the flange portion and the flange portion. A bearing having a locking tongue protruding from a portion thereof is provided, the bearing is inserted into the rotating shaft, and a detent pin is press-fitted into the rotating shaft by one side of the locking tongue of the bearing, A support hole into which the outer circumferential surface of the ring body can fit and through which the flange cannot pass, and a support hole which is connected to a part of the support hole and through which the locking tongue and the detent pin can pass. The rotation shaft is inserted into the support plate having a certain notch from the end on the locking pin side, and with the flange of the bearing engaged with the support plate, the locking tongue is inserted into the support plate. The bearing is rotated so as to deviate from the notch, and a part having a split groove that engages with the rotation stopper pin is inserted from the end of the rotating shaft to be connected in a relatively non-rotatable manner, and the rotation is performed. A method for assembling a rotating shaft having a rotation stopper pin into a support plate, characterized in that the shaft is passed through another support plate from the above-mentioned end.