JPH0310755Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a hand-type electric pine serge machine, and more specifically, a pine surge machine that flexibly connects a head to a hand case and vibrates the head. In the pine surge machine that is installed to obtain the effect, the mounting structure of the unbalanced weight is installed to apply vibration to the head, and more specifically, the center of gravity of the weight is located on the extension line along the radial direction of the bearing. This invention relates to a mounting structure for an unbalanced weight that is rotatably installed.

[Conventional technology]

Generally, in a hand-type pine surge machine, the head is flexibly connected to the hand case, and the head is vibrated by rotating an unbalanced weight built into the head.
It is provided so as to obtain a pine surge effect through the vibration of the head. Conventionally, the method of attaching an unbalanced weight to the head is to install a pair of front and rear bearings inside the head, and attach the tip of the rotating shaft, which is connected to the output shaft of the motor built into the hand case via a transmission spring, to both bearings. At the same time, a method was used in which an unbalanced weight was mounted on the tip of the rotary shaft between the two bearings, but in this method, both the bearings were supported during assembly. In light of the fact that it is extremely troublesome to accurately match the centers of bearings, and if the centers do not match, heat generation, seizing, uneven wear, noise, etc. will occur in the bearing part, so we have made improvements. In order to do this, the applicant has proposed an unbalanced weight mounting structure. (Utility Model No. 60-184534).
That is, as shown in FIGS. 4 and 5, the tip of a rotating shaft 10 extending from a motor M built in the hand case 1 via a transmission spring 5 is supported within the head 2 by a single bearing 8. At the same time, an unbalanced weight 9 is formed by providing a weight 9a on a part of the periphery of a base portion 9a at the tip of the rotating shaft 10, and the center of gravity of the weight 9b is a bearing 8.
The mounting structure of the unbalanced weight is such that troubles such as heat generation do not occur, and it is easy to assemble by placing the shaft on the extension line along the radial direction so that it rotates. is proposed.

[Problem that the invention attempts to solve]

However, in the conventional unbalanced weight mounting structure as described above, a weight is provided on a part of the periphery of the base part (disk part) to form an unbalanced weight, and the unbalanced weight is supported by a bearing. By mounting the shaft at the tip of the rotating shaft, for example, you can change the set weight of the weight,
If the size of the bearing is changed to correspond to the weight, or if a space is provided between the unbalanced weight and the bearing to insert an elastic washer, the center of gravity of the weight will be on the extension line along the radial direction of the bearing. If the bearing is not positioned properly, it will be twisted against the rotating shaft, or in other words, it will not be possible to provide space for the elastic washer or freely set the size (length) of the bearing. This has the first problem.

In addition, as the unbalanced weight is formed by directly fixing the weight to the base (disc part) as described above, the lubricating oil of the bearing is distributed between the unbalanced weight and the bearing as the rotating shaft rotates. In addition to the lubricating oil scattering toward the head cover through the gap between the two and adhering to the head cover, damaging the head cover, lubricating oil leaks from the head cover to the outside, reducing the product value of the pine surge machine. There is a second problem in that this occurs. In order to prevent such problems, it is necessary to use an oil-resistant material for the head cover, which creates a new problem of increasing the cost of the product.

This invention is an attempt to improve the above-mentioned problems, and it is possible to secure a space for inserting an elastic washer between the unbalanced weight and the bearing, and to freely change the size of the bearing. There are problems that need to be solved in order to be able to set the setting and prevent the lubricating oil from scattering. That is, in the present invention, the unbalanced weight is provided with a skirt portion, and the skirt portion prevents lubricating oil from scattering, and the length of the skirt portion is reduced by attaching the weight to the tip of the skirt portion. The mounting position of the weight can be adjusted through the settings, which allows space for installing the elastic washer to be secured without causing distortion, and the size of the bearing can be freely set. The specific means and effects are as follows.

[Means for solving problems]

A cylindrical base is provided, which is formed into a substantially covered cylindrical shape by extending a skirt part from the peripheral edge of the disc part mounted on the rotating shaft to the bearing side with a certain length dimension, and a tip end of the skirt part. An unbalanced weight is formed by fixing a weight to a part of the periphery in correspondence with the bearing, and the skirt portion of the cylindrical base covers the upper end of the bearing and the entire periphery near the upper end.

[Effect]

By appropriately setting the length of the skirt part, the center of gravity of the weight can be extended along the radial direction of the bearing, regardless of the spacing between bases for interposing an elastic washer between the unbalanced weight and the bearing, and the size of the bearing. It can be placed on a line,
This provides an effect of preventing the unbalanced weight from twisting with respect to the rotating shaft. Further, by providing the skirt portion of the cylindrical base so as to cover the upper end of the bearing and the entire circumferential edge near the upper end, it is possible to prevent the lubricating oil discharged from the rotating shaft from scattering onto the head cover.

〔Example〕

Hereinafter, specific embodiments of the present invention will be described with reference to the illustrative drawings.

Reference numeral 1 indicates a hand case, and 2 indicates a head connected to the tip of the hand case 1. Same hand case 1
is formed into a long cylindrical shape in its overall shape, and a motor M is built into the case 1 with its output shaft 3 protruding from the tip of the case 1, and the motor M is mounted on the periphery of the case 1. A switch S for turning M on and off is provided. A connecting spring 4 extends from the distal end of the case 1 so as to surround the output shaft 3, and the aforementioned head 2 is flexibly and swingably connected to the distal end of the connecting spring 4.

The head 2 has a disk-shaped head base 2a with a through hole 6 in the center thereof through which the connecting spring 4 and the conduction spring 5, which will be described later, are inserted.
A head cover 2b having a hollow cylindrical shape with a lid is attached to the head cover 2b.
It is formed by winding the annular elastic body 2c around the peripheral wall of. A bearing housing 7 is provided in the hollow portion of the head 2. The coaxial bearing housing 7 has a flange 7b in between, and the bearing cylinder part 7
It is formed by protruding the connecting cylinder part 7b and the connecting cylinder part 7b in opposite directions. The connecting cylindrical portion 7b is fitted into the through hole 6, and the distal end portion of the aforementioned connecting spring 4 is coupled to the connecting cylindrical portion 7b. Also, bearing cylinder part 7
A is provided with a bearing 13, and the rotating shaft 10 is supported on the bearing 13. The rotary shaft 10 and the output shaft 3 are connected by a transmission spring 5, and an appropriate space L is provided between the rotary shaft 10 and the bearing 13 at the tip end thereof.
An unbalanced weight 12 is mounted on the shaft with an elastic washer 11 interposed therebetween.

The unbalanced weight 12 has a cylindrical base 12a formed into a substantially covered cylinder shape by extending the skirt part 12a'' downward from the peripheral edge of the disc part 12a' with a certain length dimension, and base 1
Weight 12b fixed to a part of the lower end periphery of 2a
The unbalanced weight 12 is attached to the rotating shaft 10 on the disk portion 12a' of the cylindrical base 12a.
A mounting boss 12c is provided to protrude upward. Further, in the cylindrical base 12a, the disk portion 12a' is provided with a larger diameter than the connecting cylinder portion 7b, and the length of the skirt portion 12a'' is larger than the interval between the spaces L. On the other hand, the weight 12b is provided with a length dimension of the skirt portion 12a'' so that its center of gravity is an extension line along the radial direction of the longitudinal intermediate portion of the bearing 13 (represented by the symbol a in FIG. 1). It is placed so that it is located above.

Next, its effect will be explained.

By turning on the switch S and starting the motor M, the driving force of the motor M is transmitted to the rotating shaft 10 via the output shaft 3 and the transmission spring 5, and the rotating shaft 10 is rotated. Since an unbalanced weight 12 is mounted on the rotating shaft 10, it is possible to generate vibrations in the head 2. By bringing the head 2 into contact with the affected area in this state where the vibration effect is obtained in the head 2, an effect that stimulates the affected area and promotes blood circulation, that is, a pine surge effect can be obtained. In the present invention, the unbalanced weight 12 is configured such that the center of gravity of the weight 12b is located on the radial extension line of the longitudinal intermediate portion of the bearing 13 by setting the length dimension of the skirt portion 12a''. Since it is provided to rotate, it rotates smoothly without causing so-called twisting to the coaxial bearing 13, that is, the coaxial bearing 13 rotates without causing problems such as heat generation, seizure, uneven wear, noise, etc. In addition, an appropriate space L is provided between the ceiling surface of the cylindrical base 12a and the upper end of the bearing 13, and an elastic washer 11 corresponding to the weight of the weight 12b is interposed in the space L. As a result, the thrust load acting in the direction of the rotating shaft 10 can be received by the elastic washer 11, and the effect of preventing frictional noise generated between the unbalanced weight 12 and the bearing 13 can be obtained.
The cylindrical base 12a is provided with a skirt portion 12a'' having a length larger than the space L, so that the bearing 13 and the upper end of the bearing cylindrical portion 7a and near the upper end are connected to each other via the skirt portion 12a''. The entire peripheral edge of the bearing 13 can be coated, thereby preventing the lubricating oil coming out from the bearing 13 from scattering.

[Effect of idea]

The present invention is constructed as described above.
As described above, a cylindrical base is provided, in which the skirt part extends downward by a certain length from the periphery of the disc part to form a substantially covered cylindrical shape, and a part of the periphery of the lower end of the cylindrical base is provided. By fixing the weight in correspondence with the bearing to form an unbalanced weight, the center of gravity of the weight can be easily positioned on an extension line along the radial direction of the center of the bearing by setting the length of the skirt part. I was able to place it. In this way, by easily placing the center of gravity of the weight on the extension line along the radial direction of the bearing, it is possible to secure a space for interposing the elastic washer between the bearing and the unbalanced weight. It has now become possible to freely set the spacing between the spaces and the size of the bearings in accordance with the weight of the weights.

In addition, in the present invention, the unbalanced weight is mounted on the rotating shaft so that the cylindrical base covers the upper end of the bearing and the peripheral edge near the upper end, so that the inner circumferential surface of the skirt portion allows the unbalanced weight to be mounted on the rotating shaft. This has made it possible to prevent the lubricating oil from scattering on the head cover. By preventing the lubricating oil from scattering in this way, it is possible to prevent the head cover from deteriorating due to the lubricating oil and improve its durability. It has now been possible to obtain a pine surge machine that prevents leakage and has excellent functionality.

[Brief explanation of the drawing]

Fig. 1 is a partial sectional view of a hand-operated electric pine surgery machine equipped with an unbalanced weight according to the present invention, Fig. 2 is an enlarged sectional view of the unbalanced weight, and Fig. 3 is an exploded perspective view of the unbalanced weight attachment part. It is. Further, FIGS. 4 and 5 are drawings showing the conventional structure, in which FIG. 4 is a partial sectional view of a hand-type electric pine surgery machine, and FIG. 5 is an exploded perspective view of an unbalance weight attachment part. 1...Hand case, 2...Head, 2a...
Head base, 2b... Head cover, 2c... Annular elastic body, 3... Output shaft, 4... Connection spring, 5...
...Conduction spring, 6...Through hole, 7...Bearing housing, 7a...Bearing cylinder part, 7b...Connection cylinder part,
7c...Flange, 10...Rotating shaft, 11...Elastic washer, 12...Unbalanced weight, 1
2a...Cylindrical base, 12a'...Disc part, 12
a″……Skirt part, 12b……Weight, 12c
...Mounting boss, 13...Bearing, L...Space, M...Motor, S...Switch.

Claims (1)

[Scope of utility model registration request] In a hand-operated electric pine serge machine in which an unbalanced weight is mounted on the tip of a rotating shaft supported by a bearing so that the center of gravity of the weight is located on the extension line along the radial direction of the bearing and rotates, the unbalanced weight is supported by a bearing. An unbalanced weight is formed by fixing a weight to a part of the periphery of the lower end of the cylindrical base, which has a skirt portion extending downward from the periphery of the disk portion and is formed into a substantially covered cylindrical shape, in correspondence with a bearing; A mounting structure for an unbalanced weight in a hand-operated electric pinesurge machine, in which the unbalanced weight is mounted on the rotating shaft so that the skirt portion of the cylindrical base covers the upper end of the bearing and the entire peripheral edge near the upper end.