KR20110095618A

KR20110095618A - Hypocycloid type worm geared speed reducer

Info

Publication number: KR20110095618A
Application number: KR1020100015190A
Authority: KR
Inventors: 우윤식
Original assignee: 우윤식
Priority date: 2010-02-19
Filing date: 2010-02-19
Publication date: 2011-08-25

Abstract

The present invention is a case; A worm gear shaft inserted into the case and exposed to one side of the case; A worm wheel which is geared in a direction perpendicular to the worm gear shaft and rotated by rotation on the worm gear shaft; An output shaft eccentrically mounted from the center of the worm wheel and inserted into the case and exposed to one side of the case; An external gear that is geared to the shock wheel at an outer side of the worm wheel; And a slide wheel installed between the external gear and the output shaft to transfer the rotational force of the external gear to the output shaft, after the power transmission process between the worm gear shaft and the worm wheel. It is possible to increase the deceleration efficiency by allowing an additional deceleration process.

Description

Hypocycloid type worm geared speed reducer

The present invention relates to a reducer, and more particularly, to a hypocycloidoid worm reducer that can increase the deceleration efficiency by forming a gear that rotates along the hypocycloid curve between the worm wheel and the output shaft.

As is well known, a reducer is a device that reduces and transmits a rotational speed of power input from various power sources such as a motor, an actuator, an engine, and is widely used in various machines, robots, and automobiles. Reducer is divided into mechanical reducer and electronic reducer, and reducer gear and belt pulley are used for mechanical reducer.

The reduction gear of such a reducer consists of a gear pair or gear train whose angular velocity of the final driven gear is smaller than the angular velocity of the first driving gear, and the reducer casings the shaft and bearing with gear pairs and mechanical elements. It is assembled by assembly to casing. Gear reducers are developed in a wide variety of structures and applications, including worm reducers, planetary reducers, gearboxes, and geared motors, depending on the type and type of gear.

On the other hand, reducers are classified into parallel shafts and rectangular shaft reducers according to the direction of the shaft. Parallel shaft reducers are widely used because of their excellent strength and efficiency, and parallel shaft gears are applied such that spur gears, helical gears, and double helical gears maintain parallelism. Right angle shaft reducers are applied to right angle shaft gears, such as bevel gear, screw gear and worm gear.

A worm reduction gear motor employing a worm gear reducer is disclosed in Korean Utility Model Publication No. 1993-1606, Registered Utility Model Publication No. 237518 and US Patent No. 6,215,209 as a speed reducer of the prior art. The worm reduction motors of these technologies reduce and output the driving force of the motor by a worm gear composed of a worm and a worm wheel. The shaft of the motor and the shaft of the worm are connected coaxially by a coupling, and the worm of the worm gear is engaged with the worm wheel. The shafts of the worm and the worm wheel are respectively supported by the casing to maintain smooth rotation by the bearings.

The worm reducer of this worm reduction motor has simple structure and economical, low noise and vibration, and self-locking can be controlled when the reduction ratio is large, and it can control reversal. It has several advantages over it. However, the worm reducer not only generates heat due to friction between the worm and the worm wheel, but also has a disadvantage of low deceleration efficiency because the deceleration is performed only through the power transmission process of the worm and the worm wheel.

The present invention has been invented to solve the above problems, to provide a hypo-cycloidic worm reducer that can increase the deceleration efficiency by the additional deceleration process after the power transmission process of the worm gear shaft and the worm wheel. There is a purpose.

According to an aspect of the present invention for achieving the above object, a case; A worm gear shaft inserted into the case and exposed to one side of the case; A worm wheel that is geared in a direction perpendicular to the worm gear shaft and rotated by rotation of the worm gear shaft; An output shaft eccentrically mounted from the center of the worm wheel and inserted into the case and exposed to one side of the case; An external gear that is geared to the shock wheel at an outer side of the worm wheel; And a slide wheel installed between the external gear and the output shaft to transfer the rotational force of the external gear to the output shaft.

Preferably, between the external gear and the output shaft is characterized in that one side is fixed to the external gear and the other side is fixed to the output shaft is provided with a slide for transmitting the rotational force of the external gear to the slide wheel.

Preferably, the inner gear is coupled to the outside of the external gear is formed in the case.

Preferably, the external gear rotates in a direction opposite to the worm wheel when the worm wheel is rotated, and forms a hypocycloid curve.

Hypocycloidic type worm reducer according to the present invention has the effect of increasing the deceleration efficiency by forming a gear that rotates along the hypocycloid curve between the worm wheel and the output shaft.

1 is a front sectional view of a hypocycloidic worm reducer according to the present invention;
2 is a side cross-sectional view of a hypocycloidic worm reducer according to the present invention;
3 is a cross-sectional view showing a worm wheel and an output shaft of a hypocycloidic worm reducer according to the present invention;
4 is a cross-sectional view showing a slide wheel and a slide installed between the external gear and the output shaft of the hypocycloidic worm reducer according to the present invention.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the hypocycloidic worm reducer according to the present invention.

1 is a front sectional view of a hypocycloidic worm reducer according to the present invention, Figure 2 is a side sectional view of a hypocycloidoid worm reducer according to the present invention, Figure 3 is a worm wheel of the hypocycloidoid worm reducer according to the present invention It is sectional drawing which shows an output shaft, and FIG. 4 is sectional drawing which shows the slide wheel and slide provided between the external gear and the output shaft of the hypocycloidic worm reducer which concern on this invention.

As shown in the figure, the hypocycloidic worm reducer according to the present invention, the case 100, the worm gear shaft 110, the worm wheel 120, the output shaft 130, the external gear 140, the slide wheel 150 It is configured to include).

The case 100 has an internal space in which the worm gear shaft 110, the worm wheel 120, the output shaft 130, the external gear 140, and the slide wheel 150 may be installed.

The worm gear shaft 110 is mounted horizontally inside the case 100, and a worm gear 111 is formed at a central portion thereof, and one side of the worm gear shaft 110 is exposed to the outside of the case 100 to be rotated by an external drive motor. do.

The worm wheel 120 is horizontally mounted in the case 100, and is geared in a vertical direction with the wedge gear shaft 110 to be rotated by the rotation of the worm gear shaft 110.

The output shaft 130 is inserted into the case 100 so as to pass through the center of the worm wheel 120, and one side thereof is exposed to the outside of the case 100. At this time, the output shaft 130 is installed to be eccentric a certain distance to the center of the worm wheel 120. Therefore, when the worm wheel 120 rotates, as shown in FIG. 3, since the output shaft 130 is eccentric from the center of the worm wheel 120, the worm wheel 120 is centered on the output shaft 130. The eccentric rotation exercise.

The external gear 140 is geared with the worm wheel 120 at the outer rear of the worm wheel 120 and rotates according to the rotation of the worm wheel 120. At this time, the external gear 140 is gear-coupled with the worm wheel 120 to rotate in the opposite direction to the worm wheel 120. Therefore, the external gear 140 moves around the worm wheel 120 in a direction opposite to the worm wheel 120 according to the rotation of the worm wheel 120.

On the other hand, the slide wheel 150 is installed between the external gear 140 and the output shaft 130 to transmit the rotational force of the external gear 140 to the output shaft 130 so that the output shaft 130 is rotated.

By such a configuration, the hypocycloidic worm reducer according to the present invention, the rotational motion path of the worm wheel 120 and the external gear 140 is a hypocyclic cycloid curve shape as the eccentric amount of the worm wheel 120, rotating and rotating You exercise. By the rotational motion of the worm wheel 120 and the external gear 140 in the form of a hypocycloidic curve, the slide wheel 150 fixed to the output shaft 130 transmits a high deceleration rotation to the output shaft 130.

Preferably, as shown in Figure 4, between the external gear 140 and the output shaft 130, one side is fixed to the external gear 140, the other side is fixed to the output shaft 130, the rotational force of the external gear 140 Slide 160 for transmitting to the output shaft 130 may be additionally installed.

The slide 160 is composed of a plurality of slides spaced apart from each other by the external gear 140 and the output shaft 130 (composed of four slides in the drawing), so that the overall cross-sectional shape forms a cross shape.

The slide 160 transmits the rotational force of the external gear 140 to the output shaft 130 in parallel with the slide wheel 150, so that the rotational force of the external gear 140 is stably transmitted to the output shaft 130. That is, the slide 160 serves to prevent the slide wheel 150 from being overloaded and damaged.

On the other hand, inside the case 100 is formed an internal tooth 170 that is coupled to the outside of the external gear 140. The internal tooth 170 serves to alleviate the rotational force of the external gear 140 to some extent during the rotation of the external gear 140 to increase the deceleration effect of the reducer.

As described above, the hypocycloidic type worm reducer according to the present invention is a hypocycloidic type worm reducer. After the power transmission process of the worm gear shaft 110 and the worm wheel 120, the external gear 140 moves in a hypocycloidal curve. While transmitting power to the output shaft 130. Therefore, since the additional deceleration process is performed after the deceleration process between the worm gear shaft 110 and the worm wheel 120, the deceleration efficiency of the reducer can be further increased.

The embodiments of the present invention described above are merely illustrative of the technical idea of the present invention, and the scope of protection of the present invention should be interpreted according to the claims. In addition, one of ordinary skill in the art to which the present invention pertains will be capable of various modifications and variations without departing from the essential characteristics of the present invention, all technical ideas within the scope equivalent to the present invention of the present invention It should be interpreted as being included in the scope of rights.

100: case 110: worm gear shaft
111: worm gear 120: worm wheel
130: output shaft 140: external gear
150: slide wheel 160: slide
170: inner tooth

Claims

case;
A worm gear shaft inserted into the case and exposed to one side of the case;
A worm wheel that is geared in a direction perpendicular to the worm gear shaft and rotated by rotation of the worm gear shaft;
An output shaft eccentrically mounted from the center of the worm wheel and inserted into the case and exposed to one side of the case;
An external gear that is geared to the shock wheel at an outer side of the worm wheel;
And a slide wheel installed between the external gear and the output shaft to transfer the rotational force of the external gear to the output shaft.

The method of claim 1,
Hypocycloidic type worm reducer, characterized in that the slide between the external gear and the output shaft is fixed to the external gear and the other side is fixed to the output shaft to transfer the rotational force of the external gear to the slide wheel.

The method according to claim 1 or 2,
Hypocycloidic type worm reducer, characterized in that the inner tooth is formed in the case and the inner gear is coupled to the outside of the external gear.

The method of claim 3,
The external gear rotates in the opposite direction to the worm wheel when the worm wheel is rotated, hypo-cycloidoid type worm reducer, characterized in that to rotate to form a hypocycloid curve.