TWM499492U - Planetary roller lead screw device - Google Patents

Description

Planetary roller guide screw device

This creation is about a ball-guide screw technology that is involved in general engineering and converts rotary motion into linear motion. In particular, this creation is a planetary roller structure that replaces the conventional ball-type structure.

The ball is guided by the ball screw between the nut and the screw, and a plurality of balls are arranged between the screw and the nut to convert the sliding contact of the conventional screw into a rolling contact, and then the ball is rotated and rotated. The mechanical components that are converted into linear motion of the nut are often used in the precision technology industry to provide positioning and measurement.

However, in order to avoid collisions with the balls of the nut, the input speed is limited, and the rotational speed is limited. In addition, the relative movement of the ball lead screw in the screw and the slide rail is sensitive to the thermal temperature rise of the surrounding environment. The larger the gap is, the larger the linear motion stroke error of the lead screw is. If the moving speed is too fast, the noise and heat energy will be increased. Therefore, the ball lead screw is not suitable for harsh environment applications, such as high load and high speed. In harsh environments such as presses or heavy industries, the service life will be shortened.

In view of the above problems, the creator further studies and develops. Therefore, the main purpose of the present invention is to provide a planetary roller lead screw device, which mainly uses a roller design to increase more contact points with the screw to achieve guidance. The screw moves smoothly and smoothly. Can withstand high loads.

In order to achieve the foregoing objectives, the technical means used in the present invention is to provide a planetary roller lead screw device, which comprises: a socket, which is in the form of a hollow seat, and a fixed portion is horizontally extended on one outer peripheral side. The hollow portion is a hole, and the hole is at least on the inner circumferential side of the two ends, and at least one first tooth pattern of a suitable axial length is disposed at least, and the first tooth has a non-spiral concave and convex shape. The hole aperture is larger than the inner diameter of the first tooth, and the socket is positioned at a position where the two ends are open, and a spacer ring is disposed on the ring surface of the spacer ring, and a plurality of through hole positioning holes are arranged at equal intervals; The two sides of the socket are arranged in a ring shape, and the two ends are respectively disposed at one end portion for receiving the hole in the through hole and being rotatable, adjacent to the end portion and corresponding to the first tooth a second ridge corresponding to the unevenness, and an annular pattern formed by the external thread between the second ribs at the two ends, the annular groove having a gap with the inner side wall of the hole, and each of the planetary rollers At one end, along the aperture of the aperture, the starting position of the annular pattern is gradually lowered; a rod having a continuous outer thread on its outer side, one end passing through the hollow of the spacer ring, wherein the external thread is threadedly engaged with each of the annular lines, and the lead screw is wound around the planetary roller as a guide A thread running distance in which the screw moves axially.

The planetary roller guide screw device disclosed in the present invention has any of the following features, and a first groove and a second groove are recessed at intervals on the inner circumferential sides of the two ends of the hole of the socket. The second groove is closer to the opening, the inner diameter of the second groove is larger than the first groove, and the first groove is similar to the first groove; thereby the first groove is embedded with the spacer, and the second groove is buckled with a C a snap ring to stop the spacer.

The planetary roller guide screw device disclosed in the present invention has any of the following Features, the number of planetary rollers can be adjusted with the bearing and lead screw.

The planetary roller guide screw device disclosed in the present invention has any of the following characteristics, and the distance between the second tooth groove and the annular groove of each planetary roller is sequentially increased, and the distance is equally divided according to the number of the planetary rollers. The lead screw moves a distance.

The planetary roller guide screw device disclosed in the present invention has any of the following features, wherein the first and second ridges of the carrier and the planetary roller are distributed relative to the planetary roller. , middle and lower positions.

The planetary roller guide screw device disclosed in the present invention has any of the following features, and the first and second ridge distribution positions of the socket and the planetary roller can be three with respect to the planetary roller. Or more than three locations.

The planetary roller guide screw device disclosed in the present invention has any of the following features, and a fixed portion is horizontally extended on the outer peripheral side of one end of the socket.

Therefore, according to the technical means of this creation, a brief description of the functions that can be obtained by this creation is as follows:

1. This creation is different from the previous type in which the ball is placed in the nut, and the screw type planetary roller is used to form the roller type lead screw structure. The planetary roller is used to form the planetary type, and the lead screw is interposed. Spiral between the planetary rollers, because of the contact point between the planetary roller and the lead screw, the ability to increase the strength and resist the impact load, the solid mechanism design, can be suitable for the harsh environment of heavy industry, can effectively grow Service life.

2. Since the planetary rollers are constrained by the spacers to form a fixed point rotation, there is no collision problem, the noise is small, and the contact between the planetary rollers and the lead screw increases. Therefore, the rotation speed can be increased, the lead can be made smaller, and the socket or the lead screw can be smoothly and smoothly moved.

3. The first tooth pattern is provided in the socket of the creation, and the second tooth pattern is set on the planetary roller. The first and second teeth are used to provide the connection between the socket and the planetary roller, and the planetary roller is supported. The rotation position of the column is not radially offset, ensuring that the circular groove of the planetary roller is completely and stable in contact with the lead screw, and the positions of the first and second ridges are not only above and below the relative planetary rollers, but also in the center. Yes, the axial length of the distribution can also be changed according to the needs of use, which is very practical.

4. The planetary roller of the creation has a gradual decrease in the starting position of the ring pattern, ensuring that the lead screw and the planetary roller surround one turn; and the second tooth of the planetary roller and the second tooth of the bearing Engage each other so that the position of each planetary roller does not cause axial displacement due to the rotational motion of the lead screw.

(10) ‧ ‧ sec

(11) ‧‧‧Fixed Department

(12)‧‧‧ Holes

(13) ‧‧‧first ditch

(14) ‧‧‧second ditch

(15)‧‧‧First tooth pattern

(16) ‧‧ ‧ spacer

(161) ‧‧‧Positioning holes

(17) ‧‧‧ buckle

(20) (201) (202) (203) (204) ‧ ‧ planetary rollers

(21) ‧ ‧ end

(22)‧‧‧Second tooth

(23) ‧ ‧ ring pattern

(30)‧‧‧ Lead screw

(31)‧‧‧ External thread

The first figure is a perspective view of a preferred embodiment of the present invention.

The second drawing is another perspective view of the preferred embodiment of the present invention.

The third drawing is an exploded perspective view of a preferred embodiment of the present invention.

The fourth drawing is an axial sectional view of a preferred embodiment of the present invention.

The fifth drawing is a plan view of the planetary rollers of the preferred embodiment of the present invention.

The sixth drawing is an axial sectional view of the action of the preferred embodiment of the present invention.

The seventh drawing is an axial sectional view of another preferred embodiment of the present invention.

The eighth figure is a perspective view of each of the planetary rollers of the preferred embodiment of the seventh embodiment of the present invention.

This creation is a planetary roller lead screw device, as shown in the first and second figures, which comprises a socket (10), a number of planetary rollers (20) located in the socket (10), and a bit. A lead screw (30) in the middle of the planetary roller (20) is used to form a planetary roller lead screw device.

Please refer to the second, third and fourth figures, wherein the socket (10) is a hollow round seat shape, and one end of the outer circumference side horizontally extends a ring fixing portion (11), and the fixing portion (11) is flattened on both sides. The surface is not labeled>, the hollow portion of the socket (10) is a hole (12), and a first groove (13) and a second groove (14) are recessed at intervals on the inner circumference sides of the two ends of the hole (12). The second groove (14) is closer to the opening, the inner diameter of the second groove (14) is larger than that of the first groove (13), and the inner circumference sides of the two ends of the hole (12) are adjacent to the first groove (13). The first tooth (15) having at least one ring of a suitable axial length, the first tooth (15) coefficient is non-spiral and uneven, and the aperture of the hole (12) is larger than the first tooth (15) Inner diameter, so the inner diameter of the second groove (14) > inner diameter of the first groove (13) > inner diameter of the hole (12) > inner diameter of the first tooth (15); by the first groove (13) for one The spacer ring (16) is embedded therein, and the second groove (14) is fastened with a C-shaped buckle (17) to block the spacer ring (16) from the seat (10). The spacer ring (16) a plurality of through hole positioning holes (161) are equally spaced apart on the torus; the plurality of planetary rollers (20) are axially extendable through the through hole positioning holes (161) of the spacer ring (16) for receiving The hole of the socket (10) (1 2), the ends of the planetary roller (20) are set to have a smooth end (21), and the end (21) is received in the through hole positioning hole (161) at the adjacent end ( 21) and corresponding to the first tooth (15) of the socket (10), the second tooth (22) corresponding to the concave and convex is set, so that the first and second ridges (15) (22) are concave-convex, correspondingly The axial length between the second ridges (22) at both ends, the planetary roller (20) is provided as an externally threaded annular pattern (23), and the annular pattern (23) has a gap with the inner side wall of the bore (12). Without interfering; the two ends (21) are accommodated in the through hole positioning holes (161) of the respective spacers (16), so that the planetary rollers (20) are annularly distributed in the inner range of the bore (12); The outer side of the lead screw (30) has a continuous external thread (31), one end passes through the hollow of the spacer ring (16), and the external thread (31) is threaded with the annular pattern (23) of each planetary roller (20). Engagement, that is, the ring pattern (23) of each planetary roller (20) is located on the outer circumference side of the lead screw (30), and is engaged with the external thread (31), like each ring pattern of each planetary roller (20). (23) It has the function of internal thread, such as the appearance of the first and second figures.

Please refer to the fourth and fifth figures. The axial length (23) of each planetary roller (20) is not the same. For example, there are eight planetary rollers (20) and each planetary roller (20). The length of the second tooth (22) to the ring pattern (23) is different. Taking the fifth figure as an example, the first planetary roller (201) on the left side, the second tooth (22) to the ring pattern The distance between (23) is the shortest, based on this, between the second tooth (22) and the ring pattern (23) of the remaining planetary rollers (201) (202) (203) (204) and the like. The distance is gradually distributed, and the axial length of the annular groove (23) is relatively shortened, for example, each annular pattern of the eight planetary rollers (20) (201) (202) (203) (204) ( 23) Between the second rib (22) and the average eccentric screw (30), one thread distance, the upper planetary roller (20) and the next planetary roller (201), for example, the next line The starting position of the ring pattern (23) of the star roller (201) is smaller than the starting position of the upper one of the planetary rollers (20) by one-eighth of the lead screw (30). 30) Rolling a contact along each of the planetary rollers (20) (201) (202) (203) (204), just the lead screw (30) A section of thread running distance that is axially moved; so designed in the direction of the helix of the lead screw (30), along the planetary roller (20) to the planetary roller (201) (202) (203) (204) The annular pattern (23) is threaded to ensure that each planetary roller (201) (202) (203) (204) does not axially displace due to the rotational motion of the lead screw (30), allowing each planetary roller The end portion (21) of (20) is still left in the position of the through hole positioning hole (161) of the spacer ring (16), and does not protrude beyond the through hole positioning hole (161), and the protection is ensured. The total height of each planetary roller (20) is uniform and does not derail.

When using the implementation, as shown in the fourth, fifth and sixth figures, if the mounting method is to install the bearing (not shown) on both ends of the lead screw (30), and connect the motor to drive the rotation, the seat (10) is fixed. The part (11) is connected to the object to be moved, and in this mounting mechanism, the rotating motion of the lead screw (30) causes the external thread (31) to drive the planetary rollers (20) to which the thread is engaged, and each planetary roller The column (20) is rotated by the end portion (21) at the through hole positioning hole (161) as a fulcrum, and the socket (10) passes through the first rib (15) and the first planetary roller (20) The two-toothed pattern (22) is in a concave-convex fit to join the socket (10), so that the rotary motion is converted into a linear motion of the socket (22), and the bearing seat (10) and its load-bearing member are straight back and forth along the lead screw (30). Displacement.

In addition, in the seventh and eighth figures, the position of the first seat and the two-toothed lines (15) (22) of the respective planet rollers (20) and the axial length distribution may be changed. For example, the distribution position of the first and second ridges (15) (22) is relative to the upper, middle and lower positions of the planetary roller (20), and the first and second ridges (15) (22) at the intermediate position. The distribution axis length can also be longer, even four positions or more than four positions to distribute the first and second ridges (15) (22), thereby increasing the contact between the socket (10) and the planetary roller (20). Surface, moderately strengthen the bearing capacity of the seat (10) and the planetary roller (20).

The above-mentioned planetary roller (20) can be adjusted in accordance with the lead screw guide (30) and the socket (10).

The above embodiments are merely illustrative of the techniques of the present invention and their effects, and are not intended to limit the present invention. Anyone skilled in the art can modify and change the above embodiments without violating the technical principles and spirit of this creation. Therefore, the scope of protection of this creation should be as listed in the patent application scope mentioned later. .

(10) ‧ ‧ sec

(11) ‧‧‧Fixed Department

(12)‧‧‧ Holes

(15)‧‧‧First tooth pattern

(16) ‧‧ ‧ spacer

(161) ‧‧‧Positioning holes

(17) ‧‧‧ buckle

(20)‧‧‧ planetary rollers

(21) ‧ ‧ end

(22)‧‧‧Second tooth

(23) ‧ ‧ ring pattern

(30)‧‧‧ Lead screw

(31)‧‧‧ External thread

Claims (7)

A planetary roller lead screw device comprises: a socket, which is in the form of a hollow seat, wherein the hollow portion is a hole, and the hole is at least on the inner circumference side of the two ends, at least one appropriate axial length is set a first tooth pattern, the first tooth pattern, the coefficient is a non-spiral shape of the concave and convex shape, the hole diameter of the hole is larger than the inner diameter of the first tooth line, and the socket is positioned at a gap between the two ends, and a spacer ring is disposed. A plurality of positioning holes are arranged at equal intervals on the ring surface of the spacer ring; the plurality of planetary rollers are arranged in a ring shape in the hole of the socket, and the two ends are respectively arranged at one end portion for receiving The positioning hole is self-rotating, and the second tooth corresponding to the first tooth and corresponding to the first tooth groove is formed as a concave-convex correspondingly, and the second tooth pattern between the two ends is a ring-shaped pattern of the external thread shape. The annular groove has a gap with the inner side wall of the hole, and each of the planetary rollers is at one end along the aperture of the hole, and the starting position of the ring groove is gradually lowered; a lead screw has an outer side surface a continuous external thread, one end of which passes through the hollow of the spacer ring, and the external thread is threadedly engaged with each of the annular lines for Along each of the lead screw of the planetary screw roller perimeter system for guiding an axial movement of the thread running distance. The planetary roller guide screw device according to claim 1, wherein a first groove and a second groove are recessed at intervals on the inner circumferential sides of the two ends of the hole of the socket, and the second groove is closer. The second groove has a larger inner diameter than the first groove, and the first groove is adjacent to the first groove; the first groove is embedded with the spacer, and the second groove is buckled with a C-shaped buckle. To stop the spacer. The planetary roller lead screw device of claim 1, wherein the number of the planetary rollers is adjustable in accordance with the socket and the lead screw. The planetary roller lead screw device according to claim 1, wherein the distance between the second tooth and the annular groove of each of the planetary rollers is sequentially increased, and the distance is divided by the number of the planetary rollers. The distance of a section. The planetary roller lead screw device of claim 1, wherein the first and second ridge distribution positions of the socket and the planetary roller are relative to the planetary roller above, middle and lower position. The planetary roller lead screw device of claim 1, wherein the first and second ridge distribution positions of the socket and the planetary roller are four or four with respect to the planetary roller. Above location. The planetary roller lead screw device according to claim 1, wherein a fixing portion is horizontally extended on the outer peripheral side of one end of the socket.