KR20090101757A - Roll down ball type high speed reducer - Google Patents

Abstract

PURPOSE: A ball down high decelerator is provided to improve productivity by performing the movement fast when being applied to an industrial mechanical device and a robot. CONSTITUTION: A ball down high decelerator includes a first cam(17), a first decelerating unit, a second decelerating unit, a cylindrical housing(25), and a plurality of bearings(29). The first cam is installed in one side of a shaft(11) of the input side. A first guide unit(16) is formed in one frame to guide a ball(15). One side of the first cam is inclined. A first extrados groove(18) is formed in the first decelerator so that the frame of one side is continued to correspond to the first guide unit of the first cam. A second guide unit is formed in the other side of the first decelerator. The first decelerator is fitted into a connection shaft(14) connected to the first and second shafts. The first decelerator is comprised of a second cam(20) with one inclined surface. A second extrados groove(22) is formed in the second decelerator so that the frame of one side is continued to correspond to the second guide unit of the second cam. The second decelerator is comprised of a third cam(23). A cylindrical housing is located in the outer circumferences of the first to third cams. The cylindrical housing has an intrados groove inside to correspond to the ball. The bearing is installed between the outer circumference of the input and output shafts and a first fixing member or a second fixing unit.

Description

ROLL DOWN BALL TYPE HIGH SPEED REDUCER}

The present invention relates to a high speed reducer that is capable of transmitting an appropriate deceleration ratio by decelerating a rotational force drawn to an input side toward an output. The rotational force introduced to the input side shaft is reduced by forming a reduction gear consisting of a ball installed between the first reduction portion and the secondary reduction portion formed by the second and third cam members, and a casing-shaped housing corresponding to one side of the ball. A plurality of balls in the secondary and the secondary deceleration unit is to be rotated in sequence by the rotation of the cam disk to decelerate at high speed. The present invention as described above is to reduce the speed at a high speed in a short time to be applied to industrial machinery, robots, etc. to provide a high speed reducer of the ball-down form without the noise at the same time to move the operation quickly.

In general, a speed reducer is described as a mechanism to reduce speed in Korean dictionary. Types of speed reducers include a worm reducer, a planetary reducer, a cycloidal reducer, and the like, and these reducers are all configured to decelerate by gears and gears of rotation, so that the speed of deceleration is limited.

In addition, there is a speed reducer using a ball, and when looking at such a conventional patented ball speed reducer, Publication No. 10-2008-0013848 of FIG. 5, the engagement surface of one side of the cam protrusions 10 always in the direction in which the driven ball 5 on one end A of the input shaft 7 and the driven ball 5 on the other end B approach each other { 10a (10b)}. Therefore, the backlash can be eliminated by the relative movement between the driven ball 5 and the cam protrusion part 10 being blocked. As backlash is removed

Since the noise generated when the cam projections 10 and the driven ball 5 are engaged is suppressed, it leads to low noise operation. The point contact makes it possible to reduce the friction between the cam protrusion 10 and the driven ball 5, and improve the transmission force to the follower wheel 4 so that smooth rotational motion can be realized with high accuracy. The device is composed of a cam protrusion (10) formed on both sides of the engaging surface to be engaged with the driven ball of the box installed at the same angular interval to the outer peripheral portion of the follower wheel, the cam protrusion is also formed in the form of a helical gear cam projection There is a problem that the high speed deceleration is not achieved because the deceleration is progressed by the gear rotation rate of the.

EP 0207206 A2 "High speed reducer in the form of a ball wedge" of Figure 2 consists of a gearless high speed reducer, but the first and second discs are arranged so as to move and rotate to face each other, the second disc is an uneven groove These sides are provided facing each other and the first and second discs are arranged in a closed loop. The ball is arranged to roll between the first and second discs. At the same time, the rotation is sent to the first and second disks. This reducer is another configuration in which the second disc faces the rectifier disc seat. That means modifying and transmitting the motion of the rotating second disk, which is arranged between the second disk and the rectifier disk.

Conventional gearheads are designed to include the use of rotating balls, which can cause severe wear on the input and output disks. The reason for this is that the contact between the guide groove and the ball, the ball, the input disk and the output disk is in contact with the ball, the short length of the force transmission is good, which is not applicable. Furthermore, traditional reducers are of a kind with large radial dimensions and relatively small reduction rates.

According to the present invention, a ball is provided between a first reduction unit made of first and second cam members in the form of a cam disc having an inclined surface on one side, and a secondary reduction unit made of second and third cam members, and the ball corresponds to one surface. The reduction gear combined with the inner ring groove is formed so that the rotational force introduced into the input shaft can be decelerated at high speed while the plurality of balls are sequentially rotated along the inner ring groove of the housing in the primary deceleration portion and the secondary deceleration portion. will be. The present invention as described above is to reduce the speed at a high speed in a short time to be applied to industrial machinery, robots, etc. to provide a high speed reducer of the ball-down form without the noise at the same time to move the movement quickly. I did it.

The present invention relates to a high speed reducer in which an outer ring groove into which a ball is inserted is formed on an outer circumferential surface of a cam disk of a cam disc type, and a housing is formed with a cylindrical inner ring groove on an outer surface thereof. The first guide part is provided on one side rim so as to guide the ball and is installed at one end, and forms a first cam member inclined on one side, and is continuous on one side rim corresponding to the first guide part of the first cam member. A first outer ring groove is formed so that a second guide portion is formed on the other side thereof, and a connecting shaft member connected to the first and second shafts is fitted to form a first reduction unit including a second cam member inclined on one surface thereof.

A second outer ring groove is formed so as to be continuous to one side edge to correspond to the second guide portion of the second cam member, and constitutes a second deceleration portion including a third cam member installed at one end of the output shaft.

The reducer is configured by combining a cylindrical housing located on the outer circumferential surface of the first, third and third cam members and having an inner ring groove formed on an inner surface thereof so as to correspond to a plurality of balls. It relates to a high speed reducer in the form of a ball lowered to move the movement quickly when applied to machinery and robots.

According to the present invention as described above, a ball is provided between the first reduction portion of the first and second cam members having a cam disc shape having an inclined surface on one side and the secondary reduction portion of the second and third cam members. By forming and providing a reducer that is combined with a housing formed with an inner ring groove so as to correspond to one surface, it is possible to quickly move the operation when applied to industrial machinery and robots to have the speed of work to promote productivity, especially in the joints of the robot By applying the speed reducer of the present invention, it is possible to quickly move the slow motion of the existing robot to speed up the operation of the robot used throughout the industry, thereby increasing productivity and efficiency of workability.

1 and 2 is an exemplary view showing a conventional reducer configuration.

Figure 3 is a cross-sectional view of the entire combined state of the high speed rotary reducer according to the present invention.

Figure 4 is a schematic view of the main portion extraction of the first reduction unit and the second reduction unit of the high speed rotation reducer according to the present invention.

Figure 5 is a connection diagram of the ball and the first cam member, the second cam member and the third cam member of the high speed rotation reducer according to the present invention.

Figure 6 is a longitudinal sectional view of the high speed rotation reducer of the present invention.

<Description of the symbols for the main parts of the drawings>

 10: Reducer 11: Human side shaft

12: Output side shaft 13: hole

14: connecting shaft member 15, 15 ': ball

16: 1st guide part 17: 1st cam member

18: 1st outer ring groove 19: 2nd guide part

20: second cam member 21: first reduction portion

22: second outer ring groove 23: third cam member

24: second reduction unit 25: housing

26: inner ring groove 27: first fixing member

28: 2nd fixing member 29, 29 ': Bearing

An embodiment of the present invention will be described in detail as follows.

A first cam member 17 formed at one side end of the input side shaft 11 so as to guide the ball 15 and having a first guide portion 16 formed at one side thereof and having one side inclined;

The first outer ring groove 18 is formed so as to be continuous to one side edge corresponding to the first guide portion 16 of the first cam member 17, and the second guide portion 19 is formed on the other side thereof. A first reduction unit 21 fitted with a connecting shaft member 14 connected to the second shaft and having a second cam member 20 inclined at one surface thereof;

The second outer ring groove 22 is formed to be continuous to one edge of the second cam portion 20 so as to correspond to the second guide portion 19, and the third cam member 23 installed at one end of the output side shaft 12. A second deceleration unit 19;

A cylindrical housing 25 which is located on an outer circumferential surface of the first, third and third cam members 17, 20, 23 and has an inner ring groove 26 formed therein so as to correspond to the balls 15, 15 ';

A high speed reducer 10 in the form of a ball wedge is provided between the input shaft 11 and the output shaft 12 outer peripheral surface and the first fixing member 27 and the second fixing member 28.

The first and second cam members 17 and 20 are characterized by consisting of a cam disk having one surface formed at a vertical angle and one surface formed at an inclined surface.

According to the present invention as described above, the input side shaft 11 side is an input side which draws in power, and the output side shaft 11 is an output side which sends out the reduced power to the other drive unit.

In addition, the first cam member 17 of the present invention is connected to the input side shaft 11 side, one surface is a vertical angle and the surface on which the first guide portion 16 is formed to form a cam disk with an inclined surface on one side. .

The second cam member 20 is fitted to the outer surface of the connecting shaft member 14 connecting the input shaft 11 and the output shaft 12, the first cam continuously formed on the rim surface of the second cam member 20 The outer ring groove 18 side is installed to correspond to the first guide portion 16 of the first cam member 17.

A plurality of balls 15 are fitted into the second outer ring groove 22 of the second cam member 20.

The third cam member 23 is installed at one end of the output shaft 12 on one side of the second cam member 20, and a plurality of second outer ring grooves 22 formed at one edge of the third cam member 23 is formed. 2 is installed to correspond to the second guide portion 19 of the cam member (20). In addition, the first, second, and third cam members 17, 20, 23 are installed in the cylindrical housing 25, and half grooves are provided on the inner circumferential surface of the housing 25 so that the balls 15, 15 'correspond to each other. The inner ring groove 26 of the type is continuously installed so that the balls 15, 15 ′ can be rotated along the inner ring groove 26.

In addition, a first fixing member 27 and a second fixing member 28 are installed on the outer surfaces of the input shaft 11 and the output shaft 12 at both ends of the housing 25, and the input shaft and the first fixing member 27 are provided. A plurality of bearings 29 are installed between and between the output side shaft and the second fixing member 28 to support the input shaft and the output shaft so that they can rotate on the same line without movement.

A connecting shaft member 14 is installed between the input shaft 11 and the output shaft 12, and bearing 29 'is fitted at both ends of the connecting shaft member 14 so that the attraction shaft 11 and the output shaft 12 are fitted. It is inserted into the central hole 13 of the) to fix the connecting shaft member 14 to the input and output shafts (11) (12).

Therefore, the present invention rotates the first cam member 17 installed at one end of the input shaft 11 when the power transmitted from the power generator such as a motor is transmitted to the input shaft 11.

The rotational power transmitted to the first cam member 17 transmits the rotational force to the second cam member 20 corresponding to the first cam member 17, and the second cam member (from the first cam member 17). The rotational force transmitted to 20 is the first outer ring groove 18 and the housing (1) formed on the outer circumferential surface of the first guide portion 16 and the ball 15 and the second cam member 20 on one side edge of the first cam member. As the inner ring groove 26 of 25 is engaged, rotational force is transmitted.

At this time, the first cam member is tapered so that the first cam member 17 having the inclined surface rotates in the same shape as the cam when the input shaft 11 rotates in accordance with the rotation of the input shaft 11. Since the gap between the first and second cam members on the opposite side where the cam members 17 and 20 are in contact with each other is not in contact with the ball 15, the rotational force is not transmitted. ) And the first guide portion 16, the first outer ring groove 18, the inner ring groove 26 of the housing in contact with the rotational force is generated to decelerate and rotate.

At this time, the ball 15 is in a state sandwiched like a wedge on one side between the first cam member 17 and the second cam member 20.

In addition, the rotational force of the first cam member 17 is rotated by a difference between the rotational ratio of the first outer ring groove 22 of the second cam member 20 and the rotational ratio of the inner ring groove 26 of the housing 25. Slows down.

In other words, since the number of the inner ring grooves 26 of the housing is one greater than the number of the first guide portions 16 of the second cam member, the ball 15 inserted into the first guide portion 16 is the first. The force engaged by the rotation of the cam member 17 is biased to one side to rotate, and at the same time, the first guide portion 16 of the second cam member 20 is offset from the inner ring groove 26 of the housing 25. By rotating with the rotation rate is reduced in the process of being transmitted from the first cam member to the second cam member.

In the same way, the rotation of the output shaft () is decelerated while the rotational force of the second cam member 20 is transmitted to the third cam member 23.

The rotation rate of the first deceleration part 21 including the first cam member 17 and the second cam member 20 is the second deceleration part 24 including the second cam member 20 and the third cam member 23. Decelerates at) and is delivered to the output side.

In addition, the speed reducer 10 of the present invention may expand the reduction unit by connecting a plurality of connecting shaft members between the output shaft and the input shaft to install a plurality of disks having a cam shape such as the second cam member.

The expansion of the reduction unit may be manufactured as desired when the desired speed reducer is desired to obtain the desired reduction rotation rate.

The present invention made as described above will be described in detail with reference to the accompanying drawings.

3 is a cross-sectional view of the entire coupling state of the high speed rotation reducer according to the present invention, in which the input shaft 11 and the output shaft 12 are positioned on the coaxial line in the configuration of the reducer according to the present invention. The connecting shaft member 14 is connected between the 12. Holes 13 are formed in the central portions of the end surfaces of the both input and output shafts to which the connecting shaft members 14 are connected, and bearings 29 'are interposed therein to fix the connecting shaft members 14.

The first cam member 17 is installed at the end of the input shaft 11 on the side connected to the connecting shaft member 14.

The first cam member 17 is installed on the input shaft 11 in a conventional manner. When the input shaft 11 is rotated, the first cam member 17 is firmly fixed without being flown to rotate the rotational force. Installed to deliver.

The first cam member 17 has a first guide portion 16 formed on one side of the rim so that the ball 15 can slide, and the first guide portion 16 is formed with a sloped surface toward one side. It is formed, the other side is formed with a vertical angle to form a cam disk of which the inclined surface is not formed.

In addition, the first fixing member 27 in the form of a cup is fixed to the outer surface of the input side shaft 11 by a plurality of bearings 29.

The second cam member 20 is fixedly installed on the outer surface of the connecting shaft member 14, the first outer ring groove 18 is continuously installed along the outer circumferential surface on the rim so that a plurality of balls 15 are inserted in one side, The other side has a second guide portion 19 is formed on the rim surface to allow the ball 15 'to slide.

The surface on which the second guide portion 19 of the second cam member 20 is formed has an inclined surface and has an inclination toward one side, and the surface on which the first outer ring groove 18 is formed on the other edge is formed to have a vertical angle. .

The first cam member 17 and the second cam member 20 correspond to each other, and a plurality of balls 15 are formed between the first guide part 16 and the first outer ring groove 18 to form a first deceleration part ( 21).

The third cam member 23 is fixed to the end of the output shaft 12 connected to the connecting shaft member 14 to output the reduced rotational force through the second shaft.

In the third cam member, a second outer ring groove () is continuously installed along the outer circumferential surface at an edge corresponding to the second cam member.

The third cam member forms a cam disk having a rectangular shape as a whole, with both sides having a vertical angle and no inclined surface formed.

A cylindrical housing 25 is installed between the first fixing member 27 and the second fixing member 28 on the outer surfaces of the first, second and third cam members 17, 20, 23.

 An inner ring groove 26 is formed on the inner circumferential surface of the housing 25 so that the ball 15, the second cam member 20, and the third cam member between the first cam member 17 and the second cam member 20 are formed. A part of balls 15 and 15 'of 23 is installed to correspond to the insertion.

In addition, the first outer ring groove 18 of the second cam member 20 constituting the first deceleration portion 21 is one less than the number of inner ring grooves 26 of the housing 25, and the third cam member ( The second outer ring groove 22 of 23 is one less than the number of the first outer ring groove 18 of the second cam member 20, the first speed reduction portion 21 for rotation transmitted to the input shaft (11) After the first deceleration in the second reduction unit 24 to further reduce the rotation is transmitted to the output side shaft.

FIG. 4 is a schematic diagram illustrating the main parts of the first reduction unit and the second reduction unit of the high speed rotation reducer according to the present invention, respectively, on the outer surfaces of the input shaft 11 and the output shaft 12 positioned at both sides of the center of the reducer 10. Two bearings 29 are installed to support the shaft. The reason for installing two bearings respectively on the outer surface of the input shaft and the output shaft is that the shaft can be rotated on the horizontal line without tilting.

In addition, the first outer ring groove 18 and the inner ring groove of the housing 25 of the first guide portion 16 and the second cam member 20 of the first cam member 17 forming the first deceleration portion 21. As the 26 is rotated corresponding to the ball 15, the rotation rate is decelerated.

The second deceleration part 24 includes the second guide part 19 of the second cam member 20, the second outer ring groove 22 of the third cam member 23, and the inner ring groove 26 of the housing 25. Corresponding to the ball 15 ', the rotation rate decelerated in the first deceleration portion is further decelerated and transmitted to the output side shaft 12.

5 is a connection configuration diagram of the first cam member, the second cam member and the third cam member and the ball of the high speed rotation reducer according to the present invention, Figure 5 is a first cam member constituting the first deceleration portion and the second deceleration portion And the ball 15 is positioned between the second cam member and the ball 15 'is positioned between the second cam member and the third cam member. The input shaft receives the rotational force transmitted from the power generator such as a motor. The 1st deceleration is transmitted to the 1st deceleration part, and the rotational force decelerated at the 1st deceleration part is 2nd deceleration at the 2nd deceleration part and transferred to the output side shaft, so that the rotation ratio suitable for the third mechanical device can be transmitted. .

In addition, as shown in FIG. 5, the distance between the first cam member and the second cam member constituting the first deceleration portion and the distance between the second cam member and the third cam member constituting the second deceleration portion are defined by the ball and the second cam member. One side corresponding to the contact is the driving force is generated and the other side is spaced apart, the ball is not contacted, because it is in a state of being separated from the power does not generate only rotation.

That is, the present invention is formed so that one surface of the first cam member and the second cam member is inclined, so that one side is in contact with the ball and the other side is in contact with the ball, as in the driving method of the cam during rotation. 2 The cam member is rotated like a wave.

6 is a longitudinal sectional view of the high speed rotation reducer according to the present invention, wherein the first guide portion 16 of the first cam member 17 and the first outer ring groove 18 and the housing 25 of the second cam member 20 are shown. The ball 15 is positioned between the inner ring groove 26 of the ball or the second cam member and the third cam member and the ball 15 'positioned between the inner ring of the housing.

The reducer of the present invention as described above forms a ball, a cam disc-shaped first, second, and third cam member so that the input rotational force can be decelerated at high speed and output. Therefore, the present invention is characterized by enabling a high speed reducer to quickly and agilely move the machinery and robots used throughout the industry.

Claims (4)

In the disk ball type reducer, A first cam member 17 formed at one side edge of the input side shaft 11 so as to guide the ball 15 and having a first guide portion 16 formed at one side thereof and having one side inclined; The first outer ring groove 18 is formed so as to be continuous to one side edge corresponding to the first guide portion 16 of the first cam member 17, and the second guide portion 19 is formed on the other side thereof. A first reduction unit 21 fitted with a connecting shaft member 14 connected to the second shaft and having a second cam member 20 inclined at one surface thereof; The second outer ring groove 22 is formed to be continuous to one edge of the second cam portion 20 so as to correspond to the second guide portion 19, and the third cam member 23 installed at one end of the output side shaft 12. A second deceleration unit 19; A cylindrical housing 25 which is located on an outer circumferential surface of the first, third and third cam members 17, 20, 23 and has an inner ring groove 26 formed therein so as to correspond to the balls 15, 15 '; A high speed reducer having a ball lowering type, characterized in that a plurality of bearings (29) are provided between the input shaft (11) and the output shaft (12) outer peripheral surface and the first fixing member (27) and the second fixing member (28). The method of claim 1, The first and second cam members (17) (20) is a ball-down high speed reducer, characterized in that the one surface is formed in the vertical angle and one surface is in the form of a cam disk formed in the inclined surface. The method of claim 1 A speed reducer having a ball lowering form, wherein a reduction gear is formed between a plurality of connecting shaft members between an input shaft and an output shaft. The method of claim 1, High speed reducer of the ball-down form, characterized in that the guide portion formed on the rim of the first cam member and the second cam member made of any one of the half groove and the inclined surface.