JPS6331338B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for aligning needles along the inner surface of an outer ring constituting a needle bearing.

Conventionally, in order to align the needles as described above, there is a device using a spline shaft 1, as shown in FIG. 1, for example.

The spline shaft 1 has a large number of vertical grooves 1a formed on its outer periphery in accordance with the shape and required number of needles 2, and after the spline shaft 1 is inserted into the center of the center hole of the outer ring 3. The needles 2 are inserted one by one into the longitudinal grooves 1a, and at the same time as the spline shaft 1 is removed, a guide rod fixed to a jig or the like or a dummy shaft is inserted and transported to the next process. Ta.

However, since the spline shaft 1 used for conventional needle alignment is required to have extremely high dimensional accuracy, it is difficult to process and is an expensive component.Furthermore, the spline tip of the spline shaft 1 is subject to wear. However, since it is easily deformed, it has to be replaced frequently, which is disadvantageous in terms of production costs and equipment maintenance.

This invention was made by focusing on the above-mentioned problems, and it is possible to align the needles using a cylindrical shaft, reduce manufacturing costs, and have a simple structure that allows for smooth operation. The purpose of the present invention is to provide a needle alignment device for needle bearings that can perform alignment work, and the configuration of the needle alignment device for needle bearings according to the present invention is such that the upper frame of the device has a diameter approximately equivalent to the inner diameter of the outer ring of the needle bearing. a push-in rod having an outer diameter of about 100 mm, and biased by a spring in the direction of assembling the needle; a supply path for supplying the needle to a side surface of the push-in rod; and a knob for pushing the needle into the push-in rod side. plate and
a knock cam that is rotatably provided on the upper frame and that rotates the knock plate back and forth; the lower frame of the device has an outer diameter corresponding to the inner diameter after insertion of the needle; A guide shaft that is removably inserted into the upper frame, and a slide bush that has approximately the same diameter as the push rod and is slidably inserted into the guide shaft, and the guide shaft is provided with an engaging portion. , the slide bush is provided with a locking part with which the locking part engages slidably only in the vertical direction, and the driven gear is pivotally connected to the knock cam and the guide shaft, and the locking part is slidably engaged with the locking part in the vertical direction. A driving gear that engages with each driven gear is pivotally attached to the provided drive shaft, and a predetermined number of needles can be pushed into the space formed when the pushing rod is retreated by the guide shaft using the knock plate. It is characterized by the following.

The present invention will be explained below based on the drawings.

2 to 5 are diagrams showing an embodiment of a needle alignment device for a needle bearing according to the present invention.

That is, this needle alignment device 10 is a device that aligns the needles 2 along the inner surface of the outer ring 3 constituting the bearing through cooperation between the upper frame 11 and the lower frame 12.

A push rod 13 is inserted from below into the upper frame 11 and is slidable in an upper end blocking hole 11a provided in the upper frame 11. This push rod 13 has a diameter corresponding to the inner diameter of the outer ring 3. and the hole 1
It is biased downward by a coil spring 14 inserted into 1a, and the range of vertical movement is restricted by providing a guide key 15 on the side.

Further, 16 in the figure is formed inside the upper frame 11,
The supply path 17 that supplies the needle 2 to the side surface of the pushing rod 13 is a knock plate that pushes the needle 2 toward the pushing rod 13 side.

As shown in FIG. 3, the knock plate 17 is rotatably mounted around a pin 18 fitted into the upper frame 11, and has a protrusion 17c formed to protrude laterally at the upper part, A coil tension spring 20 is stretched between the needle plate guide 19 fixed to the upper frame 11 side, and a needle pushing end 17a that pushes the needle 2 into the pushing rod 13 side.
is located below the supply path 16. Further, on the upper side of the knock plate 17 in the upper frame 11, a knock cam 2 having an inner cam 21a is provided.
1 is rotatably attached via a bearing 21b, and the upper end engaging portion 17b of the knock plate 17
is engaged with the inner cam 21a of the lock cam 21.

In addition, in the figure, 22 is a holder that holds the upper frame 11, 23 is a collar that suppresses the lock cam 21,
24 is a bottom plate that receives the needle 2 that has descended within the supply path 16.

On the other hand, in the case of the lower frame 12, a guide bush 27 which is flush with the upper surface of the track 25 is provided at the upper end of a cylindrical guide flange 26 on the lower side of the track 25 for conveying the outer ring 3. , another guide bush 28 is provided on the lower side.

A guide shaft 29 having an outer diameter smaller than the inner diameter of the guide flange 26 and a slide bush 30 into which the guide shaft 29 is slidably inserted are inserted into the guide flange 26. Furthermore, a compression coil spring 31 is provided that urges the slide bush 30 downward.

The guide shaft 29 has a diameter corresponding to the inner diameter when the needle 2 is inserted into the outer ring 3, and is rotatable within the guide flange 26 as described later. In addition, the slide button 30
has an outer diameter that is approximately the same as the outer diameter of the pushing rod 13, and has an outer diameter that can penetrate the outer ring 3, and is slidably fitted into a guide bush 27 provided at the upper end of the guide flange 26. It is equipped.

The guide shaft 29 is provided with a key 32 passing through it in the diametrical direction as an engaging portion, and as shown in FIG. As the guide shaft 29 rotates, the slide bush 30 also rotates within the guide flange 26 by being slidably engaged only in the vertical direction with a keyway 30a as a locking portion formed in the guide shaft 29.

Further, the guide shaft 29 has a large-diameter portion 29a at a portion below the center thereof, and when the guide shaft 29 is raised by a drive mechanism (not shown), the guide shaft 29 extends over the length of the needle 2. When the guide shaft 29 rises to an extent exceeding 1, the large diameter portion 29a is locked to the lower end of the slide bush 30, and as the guide shaft 29 rises, the slide bush 30 also rises.

Note that when the guide shaft 29 is housed in the lower frame 12, the upper end surfaces of the guide shaft 29 and the slide bush 30 are aligned with the track 25.
It is flush with the top surface of.

In the upper frame 11 and lower frame 12 configured as described above, the knock cam 21 and the guide shaft 29 have respective shafts 35a and 36.
Driven gears 35 and 36 are fixed concentrically by a. Further, reference numeral 39 denotes a drive shaft disposed in the vertical direction across the upper frame 11 and the lower frame 12, and this drive shaft 39 is connected to a rotational drive device (not shown) and is connected to each of the driven Drive gears 37, 3 engaged with gears 35, 36
8 is attached to the shaft, and links the knock cam 21 and the guide shaft 29. At this time, the drive gear 38 on the lower frame 12 side corresponds to the driven gear 36 that moves up and down together with the guide shaft 29, and thus has a tooth width corresponding to the range of its up and down movement.

Next, the operation of the needle alignment device 10 configured as above will be explained.

First, the outer ring 3 that has been transported on the truck 25
As shown in FIG. 2, when the guide shaft 27 stops at the center of the guide shaft 27, the drive mechanism (not shown) moves the guide shaft 2 as shown in FIG.
9 begins to rise. At this time, the guide shaft 29 protrudes from the slide bush 30 to approximately the length of the needle 2, and then the large diameter portion 29
a and the lower end of the slide bush 30, the push rod 13 is raised along with the slide bush 30 to pass through the center hole of the outer ring 3, and the push rod 13 is pushed up to the position where the supply path 16 is opened. At the same time, a space 40 is formed between the guide shaft 29 and the upper frame 11.

Next, when the drive shaft 39 is rotated by a rotary drive device (not shown), each of the gears 35 to 3
8, the lock cam 21 and the guide shaft 2
9 and the slide bush 30 simultaneously rotate, and the engagement between the inner cam 21a of the knock cam 21 and the upper end engaging portion 17b of the knock plate 17 causes the knock plate 17 to reciprocate around the pin 18. perform a movement.

Therefore, during the reciprocating rotation, when the needle pushing end 17a of the knock plate 17 moves in the direction away from the pushing rod 13 (to the right in FIG. 6), it moves down inside the supply path 16. When the needle 2 is conveyed onto the bottom plate 24 and then the needle pushing end 17a of the knock plate 17 returns in the opposite direction (to the left in FIG. 6), the needle 2
The lower end portion is pushed into the space 40 formed within the upper frame 11. Further, the guide shaft 29 and the slide bush 30 rotate in conjunction with the above-mentioned pushing, thereby moving the needle 2 into the space 40.
It works to actively feed the material in the circumferential direction. By repeating this operation, the space 40
A large number of needles 2 are sequentially arranged within the container.

As shown in FIG. 5, the needle-pushing end 17d of the needle-pushing end 17a of the knock plate 17 has an inclined surface chamfered in the direction of rotation of the guide shaft 29 (direction of arrow A in the figure). When pushing the needle 2 into the space 40 with the end surface 17d, the guide shaft 2
In addition to the effects of rotation of the slide bush 9 and slide bush 30, the needle 2 can be fed into the space 40 more smoothly.

Further, when a predetermined number of needles 2 are pushed into the space 40, the rotation of the drive shaft 39 is stopped by stopping the rotational drive device (not shown), and thereby the knock cam 21, the guide shaft 29, and the slide bush 30 are rotated. The rotation is stopped, and then the guide shaft 29 is lowered by a drive mechanism (not shown). Then, as it descends, the push rod 13 descends while pressing the needle 2 and the guide shaft 29 due to the repulsive force of the spring 14 provided in the upper frame 11, and the slide bush 30 moves down the guide flange 2.
It is lowered together with the guide shaft 29 by the repulsive force of the compression coil spring 31 provided in the guide shaft 29 .

Then, the lowering of the push rod 13 is the guide key 1.
5, then slide button 30
is pushed into the space 40 while the guide shaft 29 is lowered until its upper end surface is flush with the upper surface of the track 25, and finally the guide shaft 29 is lowered until its upper end surface is flush with the upper surface of the track 25. The needle 2, which had been inserted, descends into the center hole of the outer ring 3, and
They are assembled in alignment along the inner surface of the outer ring 3.

Thereafter, the outer ring 3, on which the needles 3 have been assembled, is transported on the track 25 to the next processing location.

Note that no guide rod or dummy shaft is inserted into the outer ring 3 that is transported after the assembly of the needles 2 is completed as described above. In other words, the needles 2 have a cylindrical shape, and since the needles 2 are aligned vertically along the inner surface of the circular outer ring 3, if a predetermined number of needles are aligned without any gaps, they will not fall inward. As long as the upper surface of the truck 25 is slid and conveyed, there will be no problem. Therefore, if even one needle 2 is missing,
Since the remaining needles 2 fall down within the outer ring 3, it is obvious at a glance that the number is insufficient, and it becomes possible to easily perform a needle number check, etc. to be performed later.

As explained above, according to this invention,
In the needle alignment device for needle bearings,
A push rod having an outer diameter approximately equivalent to the inner diameter of the outer ring and biased by a spring in the direction of assembling the needle, and a supply path for supplying the needle to the side surface of the push rod, on the upper frame of the device. Then, a knock plate for pushing the needle into the pushing rod side, and a lower frame of the knock cam device which is rotatably provided on the upper frame and rotates the knock plate back and forth, have an outer diameter corresponding to the inner diameter after the needle is inserted. a guide shaft that is rotatable and removably inserted into the upper frame of the device; and a slide bush that has approximately the same diameter as the push rod and is slidably inserted into the guide shaft, The guide shaft is provided with an engaging portion, and the slide bush is provided with a locking portion with which the engaging portion is slidably engaged only in the vertical direction, and the locking cam and the guide shaft are connected to the driven gear as an axis. At the same time, a drive gear that engages with each driven gear is pivotally attached to a drive shaft disposed across the upper and lower frames, and the drive gear is inserted into the space formed when the push rod is retreated by the guide shaft. Since the configuration of the needle alignment device for needle bearings is characterized in that a predetermined number of needles can be pushed in by a knock plate, the conventional spline shaft is abolished and the needles are aligned using a simple cylindrical shaft. Therefore, it is possible to reduce manufacturing costs and facilitate maintenance of the device. Furthermore, the interlocking mechanism using the drive shaft has the advantage that alignment work can be performed smoothly with a simple structure.

[Brief explanation of the drawing]

FIG. 1 is a plan view illustrating a conventional spline shaft for aligning needles for a needle bearing, FIG. 2 is a cross-sectional view illustrating a needle alignment device according to an embodiment of the present invention, and FIG. BB line sectional view of , Figure 4 is C of Figure 2
- A sectional view taken along line C, Figure 5 is a sectional view taken along line DD in Figure 2, and Figures 6 and 7 show how the needle is inserted into the space formed by the rise of the guide shaft in the needle alignment device shown in Figure 2. FIG. 2 is a partially enlarged cross-sectional view showing a state in which it is pushed in, and a partially enlarged cross-sectional view showing a state when the assembly is completed. 2... Needle, 3... Outer ring, 10... Needle alignment device, 11... Upper frame, 12... Lower frame, 13... Push rod, 14... Spring, 16... Supply path, 17... Knock plate, 29... Guide shaft, 30... Slide bush, 30a...Keyway (locking part), 3
2... Key (engaging part), 35, 36... Driven gear, 3
7, 38... Drive gear, 39... Drive shaft,
40...Space.

Claims (1)

[Scope of Claims] 1. A device for aligning needles along the inner surface of an outer ring constituting a needle bearing, wherein the upper frame of the device has an outer diameter approximately equivalent to the inner diameter of the outer ring, and a spring is provided with a spring. A push rod biased in the direction of assembling the needle, a supply path for supplying the needle to a side surface of the push rod, and a knock plate for pushing the needle into the push rod side.
a knock cam that is rotatably provided on the upper frame and that rotates the knock plate back and forth; the lower frame of the device has an outer diameter corresponding to the inner diameter after insertion of the needle; comprising a guide shaft that is removably inserted into the upper frame, and a slide bush that has approximately the same diameter as the push rod and is slidably inserted into the guide shaft,
The guide shaft is provided with an engaging portion, and the slide bush is provided with a locking portion with which the engaging portion is slidably engaged only in the vertical direction, and the locking cam and the guide shaft are connected to the driven gear as an axis. At the same time, a drive gear that engages with each driven gear is pivotally attached to a drive shaft disposed across the upper and lower frames, and the drive gear is inserted into the space formed when the push rod is retreated by the guide shaft. A needle alignment device for a needle bearing, characterized in that a predetermined number of needles can be pushed in by a knock plate. 2. The needle alignment device for a needle bearing according to claim 1, wherein the needle pushing end surface of the knock plate is an inclined surface.