KR200390106Y1 - A High Ratio Speed Reducer Using A Guide Bar - Google Patents

Abstract

The present invention is composed of a rapid deceleration device required in the industry in a relatively simple configuration, the high speed rotation of the drive shaft is a deceleration device that rotates the driven shaft by the rapid deceleration.

According to the present invention, an arm (2) transmitting power to the end of the drive shaft (1) is fixed, and the arm (2) enters the inside of the empty external gear (3) and pushes the external gear (3) in the circumferential direction. The external gear (3) rotates and is inscribed with the internal ring gear (4) in which the center of the case (7) is fixed in the same direction as the axial direction, and the driven shaft (5) is located at the center of the external gear (3). A guide hole 31 for guiding the guide bar 51 and a hole twice as large as an eccentric size than the diameter of the guide bar, and a guide bar 51 at the end of the driven shaft 5 is fitted into the guide hole 31. Device.

  Here, when the arm 2 rotates once, the external gear 3 rotates at a distance equal to the number of teeth within the internal ring gear 4, and the guide hole 31 is located at the center of the external gear 3. The guide bar 51 of the driven shaft 5 is guided to rotate the driven shaft (5).

Description

A High Ratio Speed Reducer Using A Guide Bar}

In general, when the power is transmitted, the driving source uses an engine or a motor, but the engine rotates at a high speed for efficiency, but depending on the device to be used, it is necessary to reduce the rotation speed at a constant rate. Generally, a combination of a plurality of external gears is used to reduce the gear ratio due to tooth aberration.

The structure of such a reducer has a problem that the volume and weight are large, the noise is high, and the reduction ratio is small.

On the other hand, in order to overcome these problems, the newly developed and patented rapid reduction device has a sun gear and a planetary gear in the main shaft, and has a large reduction ratio due to the number of teeth of the internal ring gear in the outer part, and a reduction device has been devised. .

However, such a speed reducer is also assembled with a number of precision parts, which is problematic in terms of weight reduction and cost reduction.

The present invention is a device completed as a result of careful attention to the improvement of the above problems, avoiding a reducer made of a combination of the conventional gear, pay a large reduction ratio, reduce noise and reduce the function of the self-lock device (self lock) It should be possible to prevent safety accidents caused by reverse thrust when power transmission stops. Most importantly, high ratios should be achieved with only two internal and external gears, which are the simplest structures, for cost reduction and miniaturization.

The structure of the present invention is as follows.

Figure 1 is an assembly view constituting the subject innovation.

According to the present invention, an arm (2) transmitting power to the end of the drive shaft (1) is fixed, and the arm (2) enters the inside of the empty external gear (3) and pushes the external gear (3) in the circumferential direction. The external gear (3) rotates and is inscribed with the internal ring gear (4) in which the center of the case (7) is fixed in the same direction as the axial direction, and the driven shaft (5) is located at the center of the external gear (3). There is a hole larger than the diameter of the guide bar and the guide hole (31) to guide the guide bar 51 at the end of the driven shaft (5) is a device fitted into the guide hole (31).

Here, when the arm 2 rotates once, the external gear 3 rotates at a distance equal to the number of teeth within the internal ring gear 4, and the guide hole 31 is located at the center of the external gear 3. The guide bar 51 of the driven shaft 5 is guided to rotate the driven shaft (5).

The action of the deceleration device of the present invention is as shown in Fig. 1, Fig. 2 and Fig.

When the power flow of the present invention is transmitted at high rotation in the drive shaft (1), it comes out at a low speed with a high torque to the driven shaft (5) via the internal device.

The high rotation of the drive shaft 1 is a large circular motion by the arm 2, and the arm 2 rubs the external gear 3 in the circumferential direction in a hollow space in a circular shape inside the external gear 3. And push. At this time, the bearing may be used to reduce the friction.

The external gear 3 rotates internally in the internal ring gear 4.

The internal ring gear 4 is fixed to the inside of the case 7 in the axial direction, which guides the space in which the external gear 3 can rotate.

The external gear (3) and the internal ring gear (4) have the same module (m) and the number of gear teeth is different by one or more. When the drive shaft (1) and the arm (2) rotate once, the external gear (3) is the external gear ( 3) and the internal ring gear (4) is pushed to the distance of the difference of the number of teeth to rotate.

The size of the hole in the center of the external gear (3) is equal to or larger than the sum of the two dimensions of the eccentricity between the external gear (3) and the driven shaft (5) and the diameter of the driven shaft (5). .

The center hole of the external gear 3 has a guide hole 31 and a rod-shaped guide bar 51 at the end of the driven shaft 5 is fitted.

The cases 6 and 7 and the drive shaft 1 and the driven shaft 2 may be connected by bearings to prevent friction and vibration.

Next, a reduction ratio will be described as an example.

Example

Dimension Z1 of the external gear 3 is 60, dimension Z2 of the internal ring gear 4 is 61,

If the diameter of the pitch circle of the external gear 3 is p3 and the diameter of the pitch circle of the internal ring gear 4 is p4,

In order for the gears to run smoothly, the module (m)

m = p3 / 60 = p4 / 61

Should be satisfied.

When the drive shaft 1 and the arm 2 are rotated once, the external gear 3 is pushed away by the distance of the number of teeth between the external gear 3 and the internal ring gear 4 at the diameter of the pitch circle. ) / Z2 will rotate.

Therefore, the reduction ratio is

           Reduction ratio (Rv) = (Z2-Z1) / Z2

Becomes If you substitute this in the above dimensions

           Reduction ratio (Rv) = (61-60) / 61 = 1/61

In this case, even if only one stage is configured experimentally, a reduction ratio of 1/100 or more is sufficiently possible.

The present invention avoids the conventional external gear ratio reducer, and the number of parts is greatly reduced, so that it is possible to rapidly decelerate with only two gears, thereby making it possible to achieve miniaturization and light weight, and the contact portion is reduced to significantly reduce the noise. Self-locking has been added to prevent accidents. Above all, only a few precision parts can be manufactured, thus reducing the production cost of the product.

Figure 1. Assembly side view of the present invention.

Fig. 2. A-A 'partial cross-sectional view of Fig. 1.

3. Cross-section with external gear and driven shaft

Claims (1)

An arm 2 transmitting power to the end of the drive shaft 1 is fixed, and the arm 2 enters the external gear 3 to push the external gear 3 in the circumferential direction and rotates the external gear 3. ) Is inscribed with the internal ring gear (4) in the case (7) and is inscribed in the center of the external gear (3) is a guide larger than the diameter of the driven shaft (5) and guide bar 51 to guide Quick reduction device using a guide bar that has a hole 31 and the rod-shaped guide bar 51 at the end of the driven shaft (5) is inserted into the guide hole (31) to transmit power.