JPS6127330A - Flywheel of health machine - Google Patents

Abstract

PURPOSE:To prevent any noise from being produced upon using the captioned flywheel with a load applied thereto by screwing a central portion of a side plate via a weight part piece, providing a rubber-made protector on the tip of said side plate, and forming in the tip of the flywheel is space whose interior is partitioned with said weight part piece. CONSTITUTION:A weight part piece 23 is held between a projection 25 provided on a side plate 22 of a flywheel 15 and screwed, and a space 30 is formed from said screwed portion to the tip of the flywheel having a rubber-made protector 29 provided thereon or a space 31 formed from said screwed portion to a rotary shaft 27. Therefor, a resonance frequency of the space 30 is changed by said partition formed with said weight part piece 30, and thereby rasping noise is prevented from being produced. In addition, since the weight part piece is provided around the tip of the flywheel, inertial mass of the flywheel is increased to permit the flywheel to be smoothly rotated.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a stationary bicycle-type health machine that exercises by applying a load to the pedals and rotating a flywheel, and particularly relates to the structure of the flywheel used therein. .

Conventional configuration and its problems In the case of a pedal type health machine, a flywheel with inertial weight is used to achieve smooth rotation. Conventionally,
The cast version of this flywheel is expensive, while the hollow version is
Since the inside is hollow, braking noise is likely to be heard, and although a weight is inserted separately, it is difficult to balance the rotation.

An example of a conventional flywheel is shown in FIG. 1 is the front knob, 2
is a side plate, which has a wheel shape and is fixed with studs 3.
A rubber band 4 is fitted around the entire outer circumference, and a ring-shaped weight 6 is fitted around the inner circumference.
Built-in. Such a structure has the following problems.

(1) When the rotational resistance is controlled by the outer circumferential side surface portion 6, the internal space 7 acts as a resonance box, and the noise during rotation is loud.

(2) It is difficult to determine the position of the weight 6, and there is no part to adjust the weight, so it is difficult to maintain a lance because the entire momentum force cannot be rotated. .

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks, and aims to provide a flywheel that makes less noise when used under load and is easy to balance.

Structure of the Invention The flywheel of the present invention includes disk-shaped left and right side plates, and flat weight pieces fixed to the side plates and sandwiched between the left and right side plates arranged at four locations on the outer peripheral side of the side plates. , and a rotating shaft coupled to the rotating center of the side plate.

Each of the weight pieces divides the space formed on the outer periphery of the fixed part into left and right halves, and the gap formed between the fixed parts of the weight pieces is divided into two on the inner periphery of the fixed part and the space formed between the fixed parts of the weight pieces. The space portions formed on the outer circumferential side are configured to communicate with each other.

According to the present invention, the weight can be securely fixed, and the noise during use can be reduced. Moreover, if the weight piece is not made symmetrical between the inner circumference and the outer circumference with respect to the fixing part, but has a shape in which the inertia weight differs depending on the mounting position, the balance during rotation can be easily and appropriately adjusted.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 4 is a side view of the health machine. 10 is a saddle, 1
1 is a pedal and a pedal flap, 12 is a frame, 13
fd handle, 14 is chain case with built-in chain, 16
The flywheel is the axis of rotation of the 16-wheel. A user sits on a saddle 10, holds a handle 13, and rotates a pedal 11. At this time, the flywheel 15 also rotates in conjunction with the
The load device 17 adjusts the rotational resistance. - Although simplified in the figure, the load device 17 is adapted to adjust the load force on the flywheel 16 by means of an adjustment device 19 connected to a rod 18. Reference numeral 20 denotes a mounting plate for instruments including the adjustment fitting 19. The flywheel 15 has a left-right alignment structure, and 21 is a fixing screw thereof.

1 to 3 show the structure of the flywheel 15. 22 is the side plate,
23 is a flat weight piece that also serves as a partition plate, 24 is a fixing hole, and the fixing screw 21 is inserted into this hole 24. The weight pieces 23 are sandwiched between the annular protrusions 26 that protrude inward from the side plate 22, and are fixed so as not to move by two fixing screws 21, and the 4 pieces are symmetrically rotated in a well-balanced manner. It is located.

Also, in the unlikely event that the rotational balance is poor, the weight piece 23 is not symmetrical on the inner and outer sides with respect to the two fixing holes, so the weight piece 23 should be reversed as shown in Fig. 3, 23'. By attaching it, you can adjust the inertial weight and balance it. 26 is a hole into which the rotating shaft 27 is inserted, and 28 is a fixing hole. Reference numeral 29 denotes a protective device made of rubber or the like that fits on the outer circumferential bent edge of the side plate 22.

Inside the flywheel 16, there are space portions 302 on the outer circumferential side and the inner circumferential side of the protrusion 25 that constitutes the fixing portion of the weight piece 23, respectively.
31 is formed, and the space 30 is divided into left and right by the weight piece 23. In addition, the number of protrusions 25 between the weight pieces is 12, and the left and right side plates 13 and the flat plate 14 are connected, and there is no space contact on the outer periphery, and a gap with a thickness equal to the plate thickness of the weight piece is formed between them. The spaces 3o and 31 communicate with each other through this gap.

FIG. 5 is a principle diagram of a Lumholtz resonator showing the principle of noise reduction in the spatial configuration of the embodiment.

C indicates a space corresponding to the space portion 30.31.

The effects of the above configuration will be explained below. It is better for the flywheel 15 to have a certain amount of weight in order to improve the feeling of use, but in order to increase this effect without increasing the overall weight, it is necessary to place a heavy object on the outer periphery to reduce the inertia effect. It's fine if you raise it. Since the weight piece 23 is fixed near the outer periphery of the side plate 22 by the fixing screw 21, it functions to increase the inertial weight.

In addition, the load device 1 presses the side plate 22 as shown by the arrow in Figure 1, and adjusts the rotational resistance of the flywheel depending on the strength of the frictional force, adjusting the rotational load force of the pedal to the position intended by the user. do the work. Since the load device 1 rubs against the outer wall of the space 30, the frictional contact sound becomes louder. However, in the present invention, the weight piece 23 divides the space 30 into two to reduce the size of the space 30. A simple cavity type muffler with a change in space and a resonant cavity, which can be seen in car mufflers, etc., by changing the frequency to make it less likely to ring, and by creating a space between each heel piece and communicating it with the space 31. It produces the same function as a type silencer. As a result, the load device 17 and the side plate 2
The fricative sound of No. 2 is suppressed from resonating and expanding, and the noise is reduced.

In addition, since the trowel piece 23 is securely fixed by the fixing screw 21, there is no wobbling during rotation, and no special force is applied.
Easy to assemble and disassemble. In addition, the vibration of the entire car is greatly affected by the unbalance when the flywheel rotates 150 times, but the trowel pieces are placed on all sides of the flywheel,
It has a structure that does not easily become unbalanced, and the inner and outer circumferential sides are asymmetrical with respect to the line connecting the two fixing holes 24, so if it is installed in reverse as shown in Figure 3, the inertia of the flywheel as a whole will be reduced. Effects of the Invention: Weight balance can be reliably adjusted and vibrations can be reduced.As described above, according to the present invention, the following effects can be obtained.

(1) Resonance is less likely to occur by partitioning the internal space of the load device friction section with a plate-shaped piece that serves as a weight.

(2) By arranging the flywheel pieces on all sides inside the flywheel, the balance can be optimized.

(3) It has a muffler effect by communicating the space on the outer periphery with the space in the center through the gaps between the four heel pieces.

(4) By changing the mounting direction of the iron piece, the position of the center of gravity can be changed, and the balance can be adjusted by changing the inertia weight.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view of the main part showing an embodiment of the flywheel of the present invention, Figs. 2 and 3 are side views showing the attachment state of the side plate and the trowel piece, and Fig. 4 is a side view of the health machine. 5 is a diagram showing the principle of a resonant cavity type muffler, and FIG. 6 is a longitudinal sectional view of the main part of a conventional flywheel. 15... Flywheel, 21... Fixing screw, 22... Side plate, 23... Trowel piece,
24...hole, 25...protrusion, 3
0. ．． 31... Spatial part. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 5
Figure C □

Claims (2)

[Claims] (1) Disc-shaped left and right side plates, flat plate-shaped weight pieces arranged at four locations on the outer peripheral side of the side plates, sandwiched between the left and right side plates and fixed to the side plates, and the rotation center of the side plates. a rotating shaft connected to the weight piece, each of the weight pieces bisects the space formed on the outer peripheral side of the fixed part thereof into left and right, and a gap formed between the fixed parts of the weight pieces; The flywheel of the health machine is configured such that the space portions formed on the inner circumferential side and the outer circumferential side of the fixed portion are communicated with each other. (2) The flywheel for a health machine according to claim 1, wherein the weight piece has a different shape on the inner circumferential side and the outer circumferential side of the portion fixed to the side plate.