JP2016205425A - Power transmission device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power transmission device improving power by utilizing contact resistance.SOLUTION: In Power transmission devices 80a-80d, a crank 42 is provided on a rotational shaft 40 connected to a load 4, and to the crank 42, a disc-like weight 44 having a heavy part 44a and a light part 44b penetrates in a rotatable manner. The weight 44 contacts with a contacted member 46, and contact resistance acts in a direction of improving power of the rotational shaft 40. Also, the centrifugal force of the heavy part 44a acts in a direction of assisting rotation of the rotational shaft 40. Consequently, power to the load 4 is improved.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a power transmission device that improves power.

  Due to the recent trend of energy saving, there is a demand for a mechanical mechanism with low energy and high work rate. Here, the following [Patent Document 1] discloses an invention relating to a two-stroke internal combustion engine that improves energy efficiency by variably controlling the bottom dead center position of a piston according to operating conditions.

JP 2006-183482 A

  However, further improvement from various approaches is desired for the improvement of the power in such a mechanical mechanism.

  This invention is made | formed in view of the said situation, and it aims at providing the power transmission device which improves a work rate using contact resistance.

The present invention
(1) A rotating shaft 40 connected to the load 4; a crank 42 provided on the rotating shaft 40; a crank 42 that penetrates in a rotatable state; has a weight portion 44a on one end side; A disc-shaped weight 44 having a portion 44b;
The above-mentioned problem is solved by providing a power transmission device including a contacted member 46 with which the peripheral surface of the weight 44 contacts.
(2) The contact member 46 is a cylindrical tube, and the weight 44 rotates while being inscribed in the contact member 46, thereby providing the power transmission device 80a according to the above (1). Solve the problem.
(3) A plurality of cranks 42 are provided, and all the cranks 42 are provided in the same direction.
The weight 44 penetrating into the crank 42 is installed so that the weight portion 44a and the light weight portion 44b are all in the same direction, thereby providing the power transmission device 80b according to the above (2). Solve the problem.
(4) The power transmission device 80c according to (1) is provided, wherein the contacted member 46 has a cylindrical shape, and the weight 44 rotates while circumscribing the peripheral surface of the contacted member 46. Thus, the above problem is solved.
(5) a sun gear 30 fixed to the drive shaft 10, a plurality of planetary gears 34 that are screwed into the sun gear 30 and revolve around the sun gear 30, and the planetary gears 34 An internal gear 32 screwed on the peripheral surface, and a planet carrier 36 that transmits the revolving motion of the planetary gear 34 to the load 4 side as the rotational motion of the driven shaft 14;
The crank 42 is provided on the rotating shaft 40 of the planetary gear 34, and
The contacted member 46 is a cylindrical tube, and the weight 44 is intermittently inscribed in the contacted member 46, thereby providing the power transmission device 80d described in (1) above, thereby solving the above-mentioned problem. To do.

  In the power transmission device according to the present invention, a crank is provided on a rotating shaft connected to a load, and a disc-shaped weight having a weight portion and a light weight portion is inserted into the crank in a rotatable state. And the work rate to a load can be improved because this weight rotates, contacting a to-be-contacted member.

It is a figure which shows the power transmission device of the 1st form which concerns on this invention. It is a figure which shows the power transmission device of the 2nd form which concerns on this invention. It is a figure which shows the power transmission device of the 3rd form which concerns on this invention. It is a figure which shows the power transmission device of the 4th form which concerns on this invention.

  An embodiment of a power transmission device according to the present invention will be described with reference to the drawings. Here, FIG. 1 is a perspective view showing a power transmission device 80a according to a first embodiment of the present invention. In FIG. 1 and each drawing described later, the contacted member 46 is shown in a transmissive state.

  The power transmission device 80a according to the first embodiment of the present invention has one end connected to a power source 2 such as a motor, an engine, a windmill, and a water turbine, and the other end connected to a load 4 such as various mechanical devices, generators, and wheels. A rotating shaft 40 is provided. In this example, the power source 2 and the rotary shaft 40 and the load 4 and the rotary shaft 40 are directly connected. However, the power source 2 and the rotary shaft 40 and the load 4 and the rotary shaft 40 are not connected. A reduction gear, a transmission, and other mechanical mechanisms are appropriately incorporated as necessary.

  The rotating shaft 40 is provided with a crank 42 having a predetermined length. In addition, a disc-shaped weight 44 is inserted into the crank 42 so as to be rotatable with respect to the crank 42. The weight 44 is not uniform in weight, and one end side is constituted by a heavy weight portion 44a, and the opposite end side of the weight portion 44a is constituted by a light weight portion 44b. There is no particular limitation on the method of forming the weight portion 44a and the lightweight portion 44b, but the semicircular portion on one end side of the weight 44 is formed by a heavy member to form the weight portion 44a, and the semicircular portion on the other end side is formed. It is preferable that the light weight member 44b is formed by a light weight member, and the two are joined to each other. Other forming methods include a method of embedding a heavy member on one end side of the weight 44 to make the weight portion 44a, and a method of reducing the weight by making a hole on one end side of the weight 44 to make the weight portion 44b. Is mentioned. A cylindrical tubular contact member 46 is provided around the crank 42 of the power transmission device 80a, and the outer peripheral surface of the weight 44 is inscribed in the inner peripheral surface of the contact member 46.

  At this time, the weight 44 and the contacted member 46 select a member or mechanism having a certain contact resistance. For example, an anti-slip member such as rubber may be attached to one or both of the outer peripheral surface of the weight 44 and the inner peripheral surface of the contacted member 46, or one or both of the weight 44 and the contacted member 46 are made of permanent magnets. The contact resistance may be improved by the formed attractive force of both magnets. Furthermore, gear teeth may be formed on each of the weight 44 and the contacted member 46 and the weight 44 and the contacted member 46 may be screwed together. The same applies to other forms of power transmission devices 80b to 80d. Thereby, the weight 44 of the power transmission device 80a rotates in the contacted member 46 while being inscribed in the contacted member 46 by the rotation of the crank 42.

  Next, the operation of the power transmission device 80a according to the first embodiment will be described. First, the power source 2 operates and the rotating shaft 40 rotates. When the rotary shaft 40 rotates, the crank 42 rotates, and the weight 44 rotates accordingly. At this time, since the weight 44 is inscribed in the contacted member 46 and a certain amount of contact resistance exists between the weight 44 and the contacted member 46, the weight 44 revolves along the inner peripheral surface of the contacted member 46. However, it rotates in the direction opposite to the rotation direction of the rotating shaft 40. The contact resistance from the contacted member 46 to the weight 44 acts in a direction that assists the rotation of the rotating shaft 40. Further, as described above, the weight 44 has the weight portion 44a and the light weight portion 44b. Particularly, the centrifugal force when the weight portion 44a moves away from the contacted member 46 on the rotating shaft 40 side is applied to the rotating shaft 40. Works in a direction to assist rotation. Thereby, the work rate to the load 4 is improved.

  Next, a power transmission device 80b according to a second embodiment of the present invention will be described with reference to FIG. In the power transmission device 80b of the second embodiment shown in FIG. 2, a plurality of cranks 42 are vertically connected to the rotary shaft 40. At this time, all the cranks 42 are provided in the same direction with no phase difference in the direction of the connected cranks 42. 2 shows an example in which two cranks 42 are connected in series, but the number of installed cranks 42 is not particularly limited. A weight 44 having a weight portion 44a and a lightweight portion 44b penetrates each crank 42 in a movable state. At this time, it installs so that the direction of the weight part 44a of each weight 44 and the lightweight part 44b may all become the same direction. A cylindrical tubular contact member 46 is provided around the crank 42 as in the case of the power transmission device 80a. The outer peripheral surface of the weight 44 rotates while being inscribed on the inner peripheral surface of the contact member 46. The power transmission device 80b according to the second embodiment operates in the same manner as the power transmission device 80a according to the first embodiment, but the power transmission device 80b according to the second embodiment has a plurality of cranks 42 and weights 44 connected to each other. Therefore, the eccentricity of the rotating shaft 40 due to the centrifugal force of the weight 44 is made with a stronger force, and the contact resistance between the weight 44 and the contacted member 46 increases. Thereby, the work rate to the load 4 can be further improved. Moreover, the centrifugal force by the weight part 44a of the weight 44 is also increased, and the work rate to the load 4 is further improved.

  Next, a power transmission device 80c according to a third embodiment of the present invention will be described with reference to FIG. The power transmission device 80c of the third embodiment has a configuration suitable for an engine such as an internal combustion engine in which the power source 2 moves up and down. In this example, the power transmission device 80c is connected to the piston 3 of the engine (power source 2).

  In the power transmission device 80c of the third embodiment shown in FIG. 3, the piston 3 that moves up and down by the engine (power source 2) and the crank 42 provided on the rotary shaft 40 are connected via the shaft 7. A weight 44 having a weight portion 44a and a lightweight portion 44b penetrates the crank 42 in a movable state. Further, the circumferential surface of the weight 44 is in contact with the outer circumferential surface of the cylindrical contacted member 46. The contacted member 46 is fixed, for example, via a fixed shaft 46 a passing through the inside of the rotating shaft 40, and does not rotate even when the rotating shaft 40 rotates or the weight 44 moves.

  Next, the operation of the power transmission device 80c according to the third embodiment will be described. First, the power source 2 operates and the piston 3 moves up and down. The vertical movement of the piston 3 is transmitted to the crank 42 of the power transmission device 80 c through the shaft 7 and converted into the rotational motion of the rotary shaft 40. Further, when the crank 42 rotates, the weight 44 revolves while rotating around the contacted member 46 in a state of circumscribing the peripheral surface of the contacted member 46. The contact resistance between the weight 44 and the contacted member 46 works in the direction of assisting the rotation of the rotating shaft 40, and the work rate to the load 4 is improved. Further, the centrifugal force generated when the weight portion 44a of the weight 44 rotates outward acts in the direction of assisting the rotation of the rotating shaft 40, and the work rate to the load 4 is improved.

  Next, a power transmission device 80d according to a fourth embodiment of the present invention will be described with reference to FIG. A power transmission device 80d of the fourth embodiment shown in FIG. 4 has a planetary gear unit 50 that decelerates and increases the torque from the power source 2 and outputs it coaxially to the load 4 side. The planetary gear unit 50 includes a drive shaft 10 that is rotated by the power source 2, a sun gear 30 that is fixed to the drive shaft 10 and rotates with the drive shaft 10, and a sun gear that is screwed into the sun gear 30. A plurality of planetary gears 34 that revolve while rotating around 30, an internal gear 32 that engages with gear teeth provided on the inner peripheral surface of the plurality of planetary gears 34, and the revolving motion of the planetary gear 34 is driven shaft A planetary carrier mechanism that is converted to a rotational motion of 14 and transmitted to the load 4 side, and has a so-called planetary planetary gear mechanism to which an internal gear 32 is fixed as a basic configuration. In this example, four planetary gears 34 are provided. However, the number of planetary gears 34 is not particularly limited, and may be two, three, or five or more. Further, the ratio of the diameter of the sun gear 30 to the diameter of the planetary gear 34 is not particularly limited, and these are appropriately set according to a reduction ratio required for the planetary gear unit 50 or the like.

  Each of the rotating shafts 40 (planetary shafts) of the planetary gear 34 is provided with a crank 42, and a weight 44 having a weight portion 44a and a lightweight portion 44b penetrates the crank 42 in a movable state. A cylindrical tubular contact member 46 is provided around the crank 42, and the peripheral surface of the weight 44 is the same as the inner peripheral surface of the contact member 46 at a position where the weight 44 is farthest from the central axis of the planetary gear unit 50. Contact.

  Next, the operation of the power transmission device 80d according to the fourth embodiment will be described. First, when the rotational force from the power source 2 is applied to the drive shaft 10, the sun gear 30 fixed to the drive shaft 10 rotates. When the sun gear 30 rotates, each planetary gear 34 screwed with the sun gear 30 rotates (rotates) in the opposite direction to the sun gear 30. Since the planetary gear 34 is also screwed with the fixed internal gear 32, the planetary gear 34 rotates (revolves) around the sun gear 30 in the same direction as the rotation direction of the sun gear 30. Then, the revolving motion of the planetary gear 34 is transmitted to the planetary carrier 36, converted into the rotational motion of the driven shaft 14, and transmitted to the load 4 side of various mechanical devices and generators.

  At this time, the rotating shaft 40 of the planetary gear 34 also rotates and revolves as the planetary gear 34 rotates and revolves. Thereby, the weight 44 provided on the crank 42 of the rotating shaft 40 revolves around the central axis of the planetary gear unit 50 while revolving around the rotating shaft 40. When the weight 44 reaches the position farthest from the central axis of the planetary gear unit 50, the peripheral surface of the weight 44 and the inner peripheral surface of the contacted member 46 come into contact with each other, and the planetary gear 34 revolves due to the contact resistance at this time. Exercise is assisted and the work rate on the load 4 is improved.

  As described above, in the power transmission devices 80a to 80d according to the present invention, the crank 42 is provided on the rotating shaft 40 connected to the load 4, and the disc-shaped weight having the weight portion 44a and the light weight portion 44b on the crank 42. 44 penetrates in a rotatable state. Further, the weight 44 comes into contact with the contacted member 46, and the contact resistance acts in the direction of improving the work rate of the rotating shaft 40. Thereby, the work rate to the load 4 is improved.

  It should be noted that the configuration, shape, arrangement, mechanism, and the like of each part of the power transmission devices 80a to 80d shown in this example are merely examples, and thus are not limited to the above examples, and the present invention does not depart from the gist of the present invention. It is possible to carry out by changing the range.

4 Load
10 Drive shaft
14 Driven shaft
30 sun gear
32 Internal gear
34 Planetary gear
36 Planetary Carrier
40 axis of rotation
42 cranks
44 spindles
44a parts by weight
44b Lightweight part
46 Contacted member
80a-80d power transmission device

Claims (5)

A rotating shaft connected to the load;
A crank provided on the rotating shaft;
A disc-shaped weight penetrating into the crank in a rotatable state and having a weight portion on one end side and a light weight portion on the opposite end side;
And a contacted member with which the peripheral surface of the weight contacts. The power transmission device according to claim 1, wherein the contacted member is a cylindrical tube, and the weight rotates while inscribed in the contacted member. A plurality of cranks, all the cranks are provided in the same direction,
The power transmission device according to claim 2, wherein the weight penetrating into the crank is installed such that the weight portion and the light weight portion are all in the same direction. The power transmission device according to claim 1, wherein the contacted member has a cylindrical shape, and the weight rotates while circumscribing the peripheral surface of the contacted member. A sun gear fixed to the drive shaft;
A plurality of planetary gears that revolve around the sun gear and rotate around the sun gear;
An internal gear in which the plurality of planetary gears are screwed together on an inner peripheral surface;
A planetary carrier that transmits the revolving motion of the planetary gear to the load side as the rotational motion of the driven shaft, and
The crank is provided on the rotating shaft of the planetary gear,
The power transmission device according to claim 1, wherein the contacted member is a cylindrical tube, and the weight is intermittently inscribed in the contacted member.

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