KR19990015665A - Double oil resistant rotary mechanism - Google Patents

Abstract

The present invention provides a main rotating body having a first fixed internal tooth having a tooth therein and an external tooth having a rotation center eccentrically positioned with respect to the rotation center of the first fixed internal tooth and engaging with the tooth of the first fixed internal tooth. It relates to an oil-resistant rotary mechanism comprising a final rotary body inserted into the main rotating body having a tooth processing inside the main rotating body so that the main rotating body also acts as a second internal tooth, and has an external tooth meshing with the inner tooth of the main rotating body. It is composed of double internal planetary expression. The final rotating body has a rotation center coinciding with the rotation center of the first fixed inner tooth so as to cancel the eccentricity of the rotation mechanism. In the dual internal planetary rotary mechanism according to the present invention, since the eccentric rotational motion of the main rotational body is canceled by the final rotational body, the parameter such as a driver necessary for the transmission of the eccentric rotational motion is unnecessary, thereby speeding up the rotation of the main rotational body than the conventional rotating mechanism. It is possible to, and because the rotational speed is increased in the process of transferring the motion from the main rotating body to the final rotating body can be increased several times compared to the conventional rotating mechanism. In addition, since the final rotor and the output shaft can be integrally manufactured, the structure of the apparatus using the oil-resistant rotating mechanism can be simplified.

Description

Double oil resistant rotary mechanism

The present invention relates to an oil-resistant rotary mechanism, in the case of transmitting the eccentric rotational movement of the main rotating body, the eccentric movement of the main rotating body to offset the eccentric motion by using a fixed internal tooth and the final rotating body having the same amount of eccentricity of the main rotating body And an internal eccentric double internal planetary rotating mechanism configured to transmit only the rotary motion through the final rotor.

The oil-resistant rotary mechanism is used for a hydraulic motor or a reducer. In the present specification, an example of a hydraulic motor will be described. The conventional oil-resistant rotary mechanism for a hydraulic motor shown in FIG. 1 has a fixed inner tooth 1 having seven arc-shaped teeth 11 and a trocoid curve created by an arc tooth of a fixed inner tooth as a tooth 21. It consists of six main rotors (2), one of which is smaller than the number of teeth of the fixed inner tooth at the time of creation. The center 20 of the main rotating body 2 is eccentric with respect to the center 10 of the fixed inner tooth 1, and all the circular arc teeth 11 of the fixed inner tooth are formed with the teeth 21 of the main rotating body 2. Interlocked. In the hydraulic motor using the oil-resistant rotating mechanism, the high pressure oil is supplied only to the part where the volume increases with the rotation of the space enclosed by the contact between the circular tooth 11 of the fixed internal tooth and the tooth 21 of the main rotor. This reduced portion is connected with the return flow path. In Fig. 1, the hatched portion represents a high pressure portion when the main rotor rotates in a clockwise direction, and the position of the portion to which high pressure is supplied in accordance with the rotation of the main rotor changes in synchronization with the rotation. Therefore, since the high pressure is applied only to a part of the main rotor 2, the force acting on the main rotor causes an unbalanced state to rotate the main rotor. At this time, since the main rotation 2 is eccentric with respect to the center 10 of the fixed inner tooth, the eccentric rotation is performed.

In the conventional oil-resistant rotary mechanism, in order to transfer the eccentric rotational motion of the main rotor 2 to the output shaft, as shown in Figure 1 by forming an inner spline 22 inside the main rotor and an inner spline on the output shaft The two splines are connected obliquely by a driver having a crowning outer spline or a method of outputting power while canceling the eccentric motion by using a parameter such as a universal joint. The use of these parameters not only complicates the device, but also limits the speed of the rotation of the main rotor.

The present invention was conceived to solve the problems of the prior art by improving the eccentric rotational motion transmission method of the oil-resistant rotary mechanism, to offset the eccentric movement of the main rotating body to provide a dual oil-resistant rotary mechanism without the whole device eccentric It is for.

1 is a schematic diagram of a conventional oil-resistant rotary mechanism used for a hydraulic motor.

Figure 2 is a schematic diagram of a double oil resistant rotary mechanism according to the present invention.

Figure 3 is a diagram showing the equivalent motion of the oil-resistant rotary mechanism to the motion of the pitch circle.

Fig. 4 is a schematic diagram showing a state rotated from the position of Fig. 2 of a double oil resistant rotary mechanism according to the present invention.

Explanation of symbols for the main parts of the drawings

1: fixed internal tooth

2, 3: main rotor

4: final rotating body

10: center of fixed internal gear

11, 21, 31, 41: tooth

20: rotation center of the main rotor

22: spline

50: pitch point

51: pitch circle of inner tooth

52: pitch circle of the rotating body

According to the present invention, an oil-resistant rotation consists of a first fixed inner tooth and a main rotating body having a center of rotation eccentrically positioned with respect to the center of rotation of the first fixed inner tooth and having an outer tooth engaged with a tooth of the first fixed inner tooth. In the mechanism, teeth are machined inside the main rotor so that the main rotor also acts as a second inner tooth, and the final rotor is inserted into the main rotor with an external tooth engaged with the internal teeth of the main rotor, thereby forming a main rotor. An oil-resistant rotary mechanism is provided in which an eccentric rotational motion of is canceled in the final rotating body.

Hereinafter, the present invention will be described in detail with reference to embodiments of the present invention shown in FIGS. 2 to 4 of the accompanying drawings.

First, referring to FIG. 2, the dual foldable oil-based rotary mechanism of the present invention includes a rotation center 20 eccentrically positioned with respect to the first fixed internal tooth 1 and the rotation center 10 of the first fixed internal tooth 1. Main rotor 3 having an external tooth 21 engaged with teeth 11 of the first fixed inner tooth 1, and a final rotor 4 inserted into the main rotor 3. Consists of. In addition, an internal tooth 31 is formed inside the main rotor 3 so that the main rotor 3 also acts as a second inner tooth, and an external tooth of the main rotor 3 outside the final rotor 4. The external teeth 41 which are created by the 31 and mesh with each other are formed.

In this embodiment, four arc-shaped teeth 31 are formed inside the main rotor, and three teeth 41 formed by the arc-shaped teeth of the main rotor are formed in the final rotor 4. . However, since the six main rotors have six teeth, according to the design, the number of internal teeth of the main rotor and the number of teeth of the final rotor can be five or four combinations, or six and five combinations.

The space formed between the teeth 11 of the fixed internal tooth 1 and the teeth 31 of the main rotating body 3 is a space for supplying and excluding high pressure oil, so that the main rotating body 3 rotates by the action of the high pressure oil. As the main rotor rotates, the space changes in volume.

In order to solve the problems of the conventional oil-resistant rotating mechanism, in order to offset the eccentricity of the main rotor 3 and the fixed internal gear 1, the eccentric amount of the main rotor and the fixed internal gear when the shape of the final rotor 4 is created. Use the same amount of eccentricity as That is, when the final rotating body 4 is designed using the same amount of eccentricity as the fixed inner tooth 1 and the main rotating body 3, the center of the final rotating body 4 is the center of the fixed inner tooth 1 ( 10), and the final rotor is engaged with the inside of the main rotor by the created tooth, so that when the main rotor is eccentric, the final rotor rotates about the center 10 of the fixed inner tooth. The eccentric motion of the main rotating body is canceled out. Therefore, since the intermediate element such as the universal joint for eccentric motion transmission is unnecessary as in the conventional rotating mechanism, the output shaft can be integrally extended to the final rotating body 4 coaxially.

FIG. 3 is a diagram generally illustrating the motion of the inner tooth and the rotating body equal to the motion of the pitch circle before explaining the motion of the dual fold oil-based rotary mechanism of FIG. 4. In the oil-resistant rotating mechanism, the number of teeth of the inner tooth is generally one more than the number of teeth of the rotating body, and therefore the rotational characteristics will be described only in this case.

If the pitch circle 52 of the rotating body having the value m rotates clockwise by an angle A and the pitch circle 51 of the inner tooth rotates by an angle B with respect to the fixed reference coordinate, the pitch point 50 is counterclockwise. Direction, wherein the rotation angle D of the pitch point with respect to the reference coordinate should satisfy the following Equation 1 according to the law of the question of the gear.

(A + D) / (B + D) = (m + 1) / m

That is, the center 20 of the rotating body rotates by D = mA-(m + 1) B counterclockwise with respect to the internal tooth difference.

When the result obtained from Fig. 3 is applied to the double oil resistance rotary mechanism according to the present invention shown in Fig. 4, since the fixed internal tooth 1 does not rotate, when the main rotor 3 rotates by an angle A, the main rotor 3 The center 20 of () is rotated by an angle mA in the direction opposite to the direction of rotation of the main rotor 3 with respect to the center 10 of the fixed internal tooth 1. When the small planetary mechanism is inserted into and installed inside the main rotor 3, the main rotor 3 is equivalent to the inner tooth only in relation to the main rotor and the planetary mechanism, and the rotation angle of the main rotor is Maintains angle A. If the number of teeth of the final rotor 4 is s and the rotation angle is C, the rotation angle of the main rotor 3 corresponding to the internal tooth is an angle A. Is determined as follows.

θ = sC-(s + 1) A

This relative rotation angle θ should be equal to mA, which is the rotation angle between the two centers when the fixed internal gear 1 and the main rotor 3 are bitten. Therefore, the rotation angle C of the final rotor 4 with respect to the rotation angle A of the main rotor 3 is determined as shown in Equation 3 below.

C = {(m + s + 1) / s}

In the embodiment of Fig. 4, the number of teeth of the main rotor 3 and the final rotor 4 is m = 6 and s = 3, respectively, so that the rotational speed of the final rotor 4 is 10 / of the rotational speed of the main rotor. 3 times As can be seen in FIG. 4, the black points displayed on the main rotor 3 and the final rotor 4, which were located in a straight line in the initial state of FIG. 2, have black dots of the final rotor than the black dots of the main rotor. It is rotated clockwise at a larger angle.

The conventional oil-resistant rotary mechanism uses the eccentric rotational motion of the main rotor 2 as an output, whereas the dual oil-resistant rotary mechanism of the present invention rotates the final rotor 4 again via the main rotor and the final rotor Since the rotation of is used as an output, in the process of transmitting the rotation of the main rotor 3 to the final rotor 4, the eccentricity can be canceled and the output of increased rotation speed can be obtained.

As described above, since the eccentric motion of the main rotating body 3 is canceled by the final rotating body 4, the dual oil resistance rotating mechanism according to the present invention eliminates the need for a parameter such as a driver required for the transmission of the eccentric rotational motion. It is possible to speed up the rotational speed of the main rotating body several times than the rotating mechanism of. In addition, since the final rotor 4 and the output shaft can be manufactured integrally, the structure of the apparatus using the oil-resistant rotating mechanism can be simplified.

Claims (3)

A tooth 11 of the first fixed internal tooth 1 having a first fixed internal tooth 1 and a rotation center 20 eccentrically positioned with respect to the rotation center 10 of the first fixed internal tooth 1. In the oil-resistant rotary mechanism composed of the main rotating body (3) having an external tooth (21) engaging with The teeth 31 are machined inside the main rotor so that the main rotor 3 also acts as a second inner tooth, An internal planetary rotary mechanism, characterized in that it comprises an outer tooth (41) engaging with the inner tooth (31) of the main rotor (3), the final rotor (4) inserted into the main rotor. The internal rotor according to claim 1, wherein the final rotor 4 has a rotation center coinciding with the rotation center 10 of the first fixed internal gear 1 so as to cancel the eccentricity of the rotation mechanism. Planetary rotary mechanism. The oil resistant rotary mechanism according to claim 1 or 2, characterized in that the final rotor (4) comprises an output shaft integrally extending coaxially thereto.