KR100654025B1 - High Speed Ballscrew Muffler - Google Patents

Abstract

The muffler device of a high speed ball screw according to the invention consists of a holder, a screw, at least one pair of corresponding rollers, a sealing ring and a sleeve tube. The holder has a central portion passing through the threaded hole. The bar roller ring provided with at least one pair of cavity seating grooves correspondingly on the holder is inserted along the cavity seating grooves in the inner hole of the holder, and the at least one pair of roller rings completely covers the circumference of the screw, thereby As a result, the roller ring has an elliptical shape, allowing the steel ball to rotate smoothly without obstructions and to create a muffled effect on the high-speed rotating ball screw.

Flange, Holder, Sealing Ring, Roller Ring, Screw, Thread, Steel Ball

Description

Muffler of high speed ball screw {MUFFLING DEVICE OF HIGH-SPEED BALL SCREW}

1 is an exploded view of a muffler device for a high speed ball screw according to the present invention.

2 is a perspective view of a muffler device according to the invention after assembly.

3 is a cross-sectional view of the muffler device according to the invention after assembly.

4 is a cross-sectional view taken along line 4-4 of FIG. 3 in accordance with the present invention.

5 is an exploded view of the roller ring according to the present invention.

6 is a perspective view of the roller ring after assembly.

7 is a cross-sectional view partially showing the roller ring.

8 is a state diagram of assembling the roller ring into the holder.

9 is a perspective view of an outer lining and an inner lining according to another embodiment of the invention.

* Explanation of symbols on the main parts of the drawing

10: holder

20: screw

30: roller ring

40: sealing ring

50: sleeve tube

The present invention relates to a muffle device of a high speed ball screw, and more particularly, to a ball screw design in which a steel ball is mounted and assembled when the screw rotates at high speed, because all steel balls are subjected to friction and crash. Sound insulation, effectively enhances the convenience and sound insulation of the assembly.

Conventional ball screws are designed such that the metal roller rotates within the threads of the screw so that noise due to collisions does not occur. In this case, a plastic partition is provided as a collision preventing role between the two metal rollers.

Therefore, Japanese Patent Laid-Open No. 2000-355278 discloses a noise prevention structure for a ball screw provided with a steel ball retainer constituting two thick retaining members each at the front and the rear. The thin banding portion is connected between the two thick retaining members, while the steel ball is filled in the space formed by the two thick retaining members. The inner hole of the holder for the ball screw is provided with a thread for receiving the thin banding portion.

"형상에 가까운 순환성 파이프가 홀더의 상부에 제공되며, 반면에 다수개의 공동의 홀이 그 하부에 제공되는 바, 롤러 리테이너의 압력블록(pressure block)이 공동의 홀 속으로 장착되어, 스틸볼의 전체 홈궤도가 그 위의 순환롤에 대하여 포맷(format)한다. 그러나, 전체구조가 복잡하다는 사실에 따라, 많은 얇은 구성요소가 조립되기 어려우며, 롤러 리테이너용 스틸 볼 및 회전부재가 스크류와 홀더 사이에 하나씩 채워져야만 하고 제조단가가 상대적으로 높다. 따라서, 제조단가를 감소시킬 가능성이 적고, 많은 얇은 구성요소의 고장이 발생할 가능성이 높다."

"A circular shaped pipe is provided at the top of the holder, while a plurality of cavity holes are provided at the bottom of which the pressure block of the roller retainer is mounted into the cavity hole, The entire groove trajectory of is formatted for the revolving rolls above it, however, due to the fact that the overall structure is complex, many thin components are difficult to assemble, and the steel balls and rotating members for the roller retainers are provided with screws and holders. They must be filled one by one and the manufacturing cost is relatively high, so it is less likely to reduce the manufacturing cost and the failure of many thin components is more likely.

" 형상이기 때문에, 스틸 볼은 그 위에서 원활하게 회전하지 않을 가능성이 있어서 방음효과를 감소시킨다.Similarly, Japanese Patent Laid-Open No. 2001-99257 is provided with a plurality of steel balls and roller retainers. A connecting strip is provided around a plurality of plastic partitions in the roller retainer, while inlet and outlet slots are provided on the holder such that the long rotating member formed by the steel ball and the roller retainer rotate in the thread in a circular manner. However, the long rotating member has a connecting head, which hinders the smoothness of the rotating member in the thread. Also, the recyclable pipe outside the holder is not an arc track.

Because of its shape, the steel ball may not rotate smoothly thereon, reducing the sound insulation effect.

In view of the above, the present inventors have studied to improve the noise generated during the rotation of the ball screw, has published the present invention that can be applied in various fields, can be easily assembled, and can reduce the defect rate of the product.

It is a main object of the present invention to provide a muffle device of a high speed ball screw having a noise suppression function during a process of activating a steel ball and the screw when the screw reaches a high speed rotation.

 Other objects, specific advantages, and novel features of the present invention will become more apparent from the following detailed description of the invention and the preferred embodiments in connection with the accompanying drawings.

As shown in FIGS. 1-3, the muffler of the high speed ball screw is mainly a cylindrical holder 10, a screw 20, at least one pair of corresponding roller rings 30, two sealing rings 40. And 41) and the sleeve tube 50. The holder 10 is in the shape of a cylinder connected to a flange 11 having a vertical wall at one end. The flange 11 is provided with a plurality of holes 12 for receiving bolts (not shown) and fixed to other objects such as linear rail devices. The holder 10 has an inner hole 13 formed in the center thereof, and the inner hole 13 has a thread 14 (see FIG. 3) and a corresponding cavity seating groove 15 therein, that is, One cavity seating groove is provided at the top of the holder 10, and the other cavity seating groove is provided at the bottom corresponding to 180 degrees therefrom. The cavity seating grooves 15 are arranged adjacent to each other in parallel without intersecting, and are arranged along the direction of the thread 14 on the inner surface of the holder 10.

As shown in FIG. 3, the holder 10 is provided with two cavity seating grooves 15 at the top and the bottom thereof, respectively. Given that one cavity seating groove 15 is arranged at the top and two cavity seating grooves 15 are arranged at the bottom, the definition of "at least one pair of corresponding joint seating grooves" still applies.

As shown in FIG. 4 according to a preferred embodiment of the present invention, each cavity seating groove 15 is located at the bottom of the outer lining 33 when the roller ring 30 is disposed in the cavity seating groove 15. It has a groove 16 that seats and engages the extruded protrusion 333.

As shown in FIG. 3, it is apparent that the front and rear portions of the inner hole 13 of the holder 10 are provided with an annular groove 17 for engaging the sealing rings 40, 41. Lubricant may be injected into the threads 21 between the two sealing rings 40, 41 so that the steel balls 32 rotate more smoothly. Each sealing ring 40, 41 is formed with a central hole 42 through which the screw passes, which covers the cavity seating groove 15 for dustproof and soundproof.

3 and 4, the present invention is provided with a pair of cavity seating grooves 15 for inserting the roller ring 30 first. The steel ring 32 of the roller ring 30 is not only contacted with the thread 21 of the outer periphery of the screw 20 but also with the thread 14 of the inner hole of the holder 10, so that the roller ring 30 is screwed. The semicircle of (20) is substantially in contact. However, a pair of roller rings are arranged at the top and the bottom, so that the entire circumference of the screw 20 is in sufficient contact and is therefore located.

5 and 6 according to a preferred embodiment of the present invention, the roller ring 30 is a rotary member including a muffle ring chain 31 and a plurality of steel balls 32, and surrounding the rotating member It consists of an outer outer lining 33 and an inner inner lining 34. The rotating member rotates in a circular manner between the outer lining 33 and the inner lining 34. The annular muffled chain 31 is provided with a stop strip 311 on each of the two sides, in order to connect the plurality of partitions 312. Each steel ball 32 is filled in the space formed every two partitions 312 so that the steel ball 32 is not separated. Since the annular muffled chain 31 has an elliptical shape, stress concentration does not occur when the steel ball 32 rotates. In addition, the outer lining 33 is mounted to the outside of the rotating member formed by the annular muffled chain 31, the steel ball 32, the inner arc groove 331, the fixed flap 332 on the outer edge and An extrusion protrusion 333 at the bottom is provided. On the other hand, the inner lining 34 is mounted to the inside of the rotating member formed by the annular muffled chain 31, the steel ball 32, the upper arc groove 341 and the fixed flap 332 (Fig. 7). A fastening flap 342 is provided on the outer rim for engagement with this). Accordingly, the jersey strip 311 and the steel ball 32 of the roller ring 30 penetrate into the space formed by the outer lining 33 and the inner lining 34 so that the roller ring 30 is the arc of each lining. It rotates through the steel balls on the grooves 331 and 341. After the fixing flaps 332 and 342 of the outer lining 33 and the inner lining 34 are engaged, the steel balls 32 are formed in the arc grooves 331 and 341 of the outer lining 33 and the inner lining 34. Rotates and contacts. Meanwhile, the space formed in the outer lining 33 and the inner lining 34 may be selectively formed by two parts arranged on the left and right sides of the roller ring 30 corresponding to each other (shown in FIG. 9). .

As shown in FIG. 8 according to one embodiment of the present invention, a cavity seating groove 15 is formed corresponding to the opposite end of the holder 10, along the inner thread 14 of the holder 10. Is placed.

In order to insert the roller ring 30 into the cavity seating groove 15, it is necessary to make the extended ends of the outer linings 30 adjacent to each other so that the roller ring 30 is pressed, thereby The width becomes narrower. The roller ring 30 is further brought into the holder 10 until the roller ring 30 moves into the bottom of the cavity seating groove 15. Since the plastic material of the outer lining 33 is flexible, the two ends form an extruded protrusion 333 to bounce outward, so that the grooves 16 are formed for seating on the two sides of the bottom of the cavity seating groove 15. It automatically binds into). At least one pair (or optionally two or more pairs) or at least two corresponding roller rings 30 are inserted into the cavity seating groove 15.

Thus, the roller ring 30 surrounds the circumference of the screw 20 so that the roller ring 30 not only faces the surface thread 21 of the screw 20 but also the direction of the internal thread 14 of the holder 10. In this way, the surface of the steel ball 32, the thread 14 inside the inner hole 13 of the holder 10 and the thread 21 on the screw 20 are in contact with each other.

It is worth mentioning that each pupil seating groove 15 is currently disposed 180 degrees at the top and bottom. On the same theoretical basis, even if each common seating groove 15 is divided into three or four quarters, the effects and intended claims are still within the scope of the present invention.

According to the muffing apparatus of the high speed ball screw according to the present invention as mentioned above, the noise prevention function is excellent during the process of activating the steel ball and the screw when the screw reaches a high speed rotation.

 Although the present invention has been described in connection with the above-mentioned preferred embodiments, it is possible to make various modifications or variations without departing from the spirit and scope of the invention. Thus, the claims include any such modifications or variations that fall within the spirit of the invention.

Claims (3)

A muffle device of a high speed ball screw comprising at least one holder, a screw and a corresponding roller ring pair, Wherein the holder has a cylindrical shape having a flange having a vertical wall at one end thereof, and an inner hole having a thread inward in the center thereof and a cavity seating groove formed along the circumference thereof; The screw is threaded; On each side of the annular muffled chain there is formed a jersey strip which connects a plurality of partitions with steel balls respectively inserted between the two partitions so that the steel balls are kept unseparated; Each roller ring is composed of an annular muffled chain and a rotating member comprising a plurality of steel balls; The rotating member is wrapped by outer and inner linings on the outer and inner surfaces, respectively, so that the rotating member rotates in a circulating manner between the outer and inner linings; When the roller ring is inserted into the cavity seating groove of the holder, the rotating member is disposed along the thread inside the holder, so that the outer surface of the steel ball is engaged with the inner thread of the holder and while the outer lining is engaged inside the cavity seating groove of the holder. Contact with threads on the screw; Accordingly, at least one pair of roller rings are inserted at regular intervals into the cavity seating grooves of the holder, so that the roller rings are arranged radially corresponding to each other on two sides of the screw, and the steel balls have a muffle effect when the screw rotates. Muffle device of the high-speed ball screw, characterized in that to cover the thread of the screw in an annular shape to achieve. The method of claim 1, wherein the number of the cavity seating grooves corresponds to the number of roller rings, and at the same time, the roller ring is inserted into the cavity seating grooves in a holder in which one or more roller rings are provided at the top and the bottom, respectively. Ball screw muffle device. The muffler of claim 1, wherein the space formed in the outer lining and the inner lining is selectively formed by two parts arranged on the left and right sides of the roller ring corresponding to each other.

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