KR20180002229U - Positive linear motion apparatus - Google Patents

Abstract

The present invention discloses an expanding linear motion apparatus including a first block, a second block, a roller retaining unit, and a power transmission unit. The first block has a first toothed groove, and the first toothed groove has a plurality of first toothed holes. The second block is provided in proximity to the first block to form the second toothed groove, and the second toothed groove is formed with a plurality of second toothed holes. The roller retaining unit is provided between the first block and the second block. The power transmission unit is installed in the roller holding unit. The power transmitting unit is formed in a disk shape and a plurality of convex teeth are formed on an outer circumferential surface. And the plurality of convex teeth of the power transmitting unit are in contact with the plurality of first toothed holes and the plurality of second toothed holes. At this time, the first block moves corresponding to the second block by the first toothed groove and the second toothed groove of the power transmission unit transmission unit.

Description

[0001] POSITIVE LINEAR MOTION APPARATUS [0002]

The present invention relates to the technical field of a power transmission device, and more particularly to a telescopic linear motion device.

In order for various machine tools to operate normally, power transmission devices play an important role. 2. Description of the Related Art In recent years, a movable type linear motion device as a power transmission device is mainly used for various machine tools.

1, the conventional linear motion device includes a first block 110, a second block 120, a roller holding device 130, and a gear 140. The first block 110, And rack gears 150 and 160 are formed on the second block 120, respectively. The roller retaining device 130 has a plurality of rollers 131 and the gear 140 is fixed on the roller retaining device 130 and contacts the rack gears 150 and 160 in a corresponding manner.

Accordingly, the gear 140 is driven by being engaged with the rack gears 150 and 160, so that the first block 110 and the second block 120 move in correspondence with each other. The frictional force generated when the first block 110 and the second block 120 perform the relative motion can be reduced by the roller 131 of the roller holding device 130. [

However, since the conventional technology is limited in the installation space, when the miniaturization gear 140 is required, it is required not only to process through the miniature module but also to process the miniature module in the rack gears 150 and 160 as well. Therefore, the machining difficulty is increased and the manufacturing cost of the linear motion device of the damping type is increased.

As shown in FIG. 2, the conventional disengaging linear motion device includes a first block 110 ', a second block 120', a roller holding device 130 'and a gear 140' Rack gears 150 ', 160' are mounted on the block 110 'and the second block 120', respectively. The roller retaining device 130'is provided with a plurality of rollers 131'and the gear 140'is fixed on the roller retaining device 130' so as to be in contact with the rack gears 150 ' do.

Accordingly, the gear 140 'is driven to engage with the rack gears 150', 160 ', thereby causing the first block 110' and the second block 120 'to move in association with each other. The frictional force generated when the first block 110 'and the second block 120' perform the relative motion can be reduced by the roller 131 'of the roller holding device 130'.

However, in the above-mentioned conventional technique, when the rack gears 150 'and 160' are installed, a plurality of machining processes such as a fixing slot and a slot for the first block 110 'and the second block 120' And a plurality of parts such as a rack rail fixing part for fixing the rack gears 150 'and 160' must be manufactured. Therefore, there is a problem in that manufacturing cost of the moving type linear motion device increases.

In conclusion, the inventor of the present invention has concentrated on the defects of the current technology by designing a novel type of linear motion device, which has been devoted to research for many years, and has improved the industrial applicability.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to improve the problems of the prior art by providing a linear motion device of a movable type in which gear parts are integrally formed to reduce unnecessary parts.

According to the object of the present invention, there is provided a moveable linear motion device including a first block, a second block, a roller holding unit, and a power transmitting unit. The first block has a first toothed groove, and the first toothed groove has a plurality of first toothed holes. The second block is provided so as to correspond to the first block, the second block has a second toothed groove, and the second toothed groove has a plurality of second toothed holes. The roller retaining unit is provided between the first block and the second block. The power transmission unit is installed in the roller holding unit. Wherein the power transmitting unit has a disk shape and has a plurality of convex teeth on an outer circumferential surface thereof and the plurality of convex teeth of the power transmitting unit are in contact with the plurality of first toothed holes and the plurality of second toothed holes. At this time, the first block moves in correspondence with the second block by the first toothed grooves, the power transmission unit, and the second toothed grooves.

Preferably, the roller retaining unit has a plurality of openings and a plurality of rollers, and convex portions of the rollers are respectively fixed to the openings, so that the plurality of rollers contact the first block and the second block.

Preferably, the first block has a first groove, the second block has a second groove and is provided corresponding to the first groove, and the plurality of rollers are provided in correspondence with the first groove and the second groove And is in contact with the groove.

Preferably, the first groove and the second groove are substantially V-shaped.

Preferably, the first toothed grooves and the second toothed grooves are formed at the bottom of the first groove and the second groove, respectively.

Preferably, the roller retaining unit is configured such that the first retaining part and the second retaining part are bonded to each other, and the plurality of openings are formed so as to correspond to the first retaining part and the second retaining part.

Preferably, the first retaining part and the second retaining part are connected by a lock engagement, an adhesive engagement, or a snap engagement.

Preferably, at least one blocking portion is formed around each opening of the roller holding unit.

Preferably, the blocking portion is a blocking member or blocking piece.

Preferably, the pitch of the plurality of convex teeth corresponds to the pitch of the plurality of first toothed holes and the plurality of second toothed holes, and the number of the plurality of first toothed holes and the plurality of second toothed holes Is determined according to the relative movement of the first block and the second block.

Preferably, the power transmitting unit is a bevel cycloid gear or a bevel involute gear, and the plurality of first toothed holes and the plurality of second toothed holes correspond to bevel holes.

The retractable linear motion device of the present invention has the following advantages.

(1) By replacing the gears of the prior art power transmission unit with bevel gears, the power transmission is more stable and does not easily depart. Further, since the bevel gears are integrally formed, it is not necessary to separately assemble the drive shaft at the center, thereby reducing unnecessary parts.

(2) Drilling is performed on the bottom of the V-shaped block groove using a drill method so that the first block and the second block correspond to the bevel gear power transmission unit. Therefore, it is possible to replace the conventional hobbing process for inserting the rack gear and the tooth row, thereby simplifying the machining. In addition, it is possible to reduce the number of parts and reduce the number of steps to insert and assemble the rack gear

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. It should be noted that the drawings described below are in accordance with the embodiments of the present invention, so that those skilled in the art will be able to acquire another drawing based on the present drawings.
1 is a schematic view showing a conventional linear motion device.
2 is a schematic view showing another conventional linear motion apparatus.
Fig. 3 is an exploded perspective view showing the retractable linear motion device of the present invention. Fig.
4 is an exploded perspective view showing a roller retaining unit of the retractable linear motion device of the present invention.
Fig. 5 is a schematic cross-sectional view showing the cam device of the present invention.

In order to understand the technical characteristics, contents, and advantages of the present invention, reference will be made to the embodiments together with the drawings to describe the present invention in detail as follows. At this time, the drawings used are merely an aid to the gist of the specification, and are not actual examples and configurations after the implementation of the gist of the invention. It is therefore to be understood that the appended claims are not limited in scope by what is contemplated by the appended claims.

Hereinafter, an embodiment of a disengaged linear motion apparatus according to the present invention will be described with reference to the related drawings. The same elements in the embodiments are denoted by the same reference numerals.

Figs. 3 to 5 are an exploded perspective view and a disassembled perspective view and a schematic cross-sectional view of the roller retaining unit of the retractable linear motion device of the present invention. Fig. As shown in the drawing, the linear motion apparatus 200 of the present invention mainly comprises a first block 210, a second block 220, a roller holding unit 230, and a power transmitting unit 240.

In this case, the first block 210 and the second block 220 are installed so as to be mutually corresponding to each other. That is, the second block 220 is installed in close proximity to the first block. The first block 210 has a first toothed groove formed to extend in the longitudinal direction, and the first toothed groove has a plurality of first toothed holes 211. Correspondingly, the second block 220 has the second toothed grooves formed to extend in the longitudinal direction, and the second toothed grooves have the plurality of second toothed holes 221. Preferably, the first block 210 has a first groove 212 and the second block 220 has a second groove 222 corresponding to the first groove 212. At this time, the first toothed grooves in which the plurality of first toothed holes 211 are formed are formed in the bottom of the first grooves 212, and the second toothed grooves in which the plurality of second toothed holes 221 are formed, 2 groove 222 at the bottom. More preferably, the first groove 212 and the second groove 222 are formed substantially in a V-shape. However, the present invention is not limited thereto.

The roller retaining unit 230 is installed between the first block 210 and the second block 220 and the power transmitting unit 240 is installed in the roller retaining unit 230. Particularly, the power transmitting unit 240 is in the form of a disk and has a plurality of convex teeth 241 on its outer circumferential surface. Therefore, the plurality of convex teeth 241 of the power transmitting unit 240 are in contact with the plurality of first toothed holes 211 and the plurality of second toothed holes 221. Preferably, the power transmitting unit 240 replaces a conventional gear piece using a bevel cycloid gear or a bevel involute gear, in which the tooth profile of the cycloid gear and involute gear is replaced by a three-dimensional bevel. The plurality of first toothed holes 211 and the plurality of second toothed holes 221 correspond to three-dimensional bevel holes. As a result, when the power is transmitted, the drive is more stable and can not be easily released as compared with the conventional gear piece. Preferably, since the power transmitting unit 240 is a bevel cycle rod gear integrally formed, it is not necessary to separately assemble the drive shaft in the center, thereby reducing unnecessary parts.

As can be seen from the above description, the plurality of first toothed holes 211 of the first block 210 and the plurality of second toothed holes 221 of the second block 220 have a rack gear It is possible to replace the conventional machining method in which the groove is thermally hobbled or inserted into the V-shaped groove side or the bottom portion, thereby simplifying the machining. It also reduces the number of parts and reduces the number of steps to insert and assemble the rack gear. Preferably, the pitch of the plurality of convex teeth 241 corresponds to the pitch of the plurality of first toothed holes 211 and the plurality of second toothed holes 221, and the pitch between the first toothed holes 211 and the second toothed holes 221, The number of holes 221 is determined according to the relative movement of the first block 210 and the second block 220. The entire V-shaped groove is machined from the end to the end without the necessity of the rack gear insertion and hobbing as in the prior art.

4 and 5, the first block 210 includes the first toothed hole 211 of the first toothed groove, the power transmitting unit 240, and the second toothed hole 221 of the second toothed groove, To move to the second block 220 in correspondence with each other. The roller retaining unit 230 includes a plurality of openings 231 and a plurality of rollers 232. The convex portions of the rollers 232 are respectively fixed to the openings 231, (210) and the second block (220). That is, the plurality of rollers 232 are in contact with the first groove 212 and the second groove 222, respectively.

Therefore, when the first block 210 moves in correspondence with the second block 220, the convex teeth 241 of the power transmitting unit 240 are in contact with the first toothed holes 211 and the second toothed holes 221 So that the roller 232 of the roller holding unit 230 can reduce the frictional force generated in the movement between the first block 210 and the second block 220. [

Illustratively, the second block 220 is fixed and the first block 210 extends in its longitudinal direction and can reciprocate. In the first block 210 and the second block 220, the roller retaining unit 230 is operated by the intermediary of the movement while fixing the rollers 232, so that the roller retaining unit 230 230 can still maintain their relative positions during the reciprocating movement of the first block 210. Further, the power transmitting unit 240 allows the roller retaining unit 230 to synchronize the opening according to the movement of the first block 210, so as not to deviate from its relative position.

In a preferred embodiment, the roller retaining unit 230 includes a first retaining part 233 and a second retaining part 234 that are joined together. At this time, a plurality of openings 231 are formed to correspond to the first holding part 233 and the second holding part 234. Preferably, the first retaining part 233 and the second retaining part 234 are connected by a lock engagement, an adhesive engagement, or a snap engagement. In addition, one or more blocking portions 235 are formed around the respective openings 231 of the roller holding unit 230. The blocking portion 235 is a blocking member or blocking piece. Illustratively, a blocking portion 235 may be formed around the opening 231 of the first retaining part 233. The roller 232 is stably fixed in the vicinity of the opening 231 of the second retaining part 234 in correspondence with the blocking part 235 of the opening 231 on the first retaining part 233 A blocking portion 235 may be formed. Therefore, the roller 232 is stably fixed to the predetermined position of the roller holding unit 230. [

The reciprocating linear motion apparatus of the present invention replaces the prior art gear with a bevel gear in the power transmitting unit so that the drive is not more stable and is not easily released. Further, since the bevel gears are integrally formed, there is no need to separately assemble the drive shaft at the center, thereby reducing unnecessary parts. Further, the first block and the second block are drilled in the bottom portion of the V-shaped block groove using a drill method so as to correspond to the bevel gear power transmission unit. Therefore, it is possible to replace the conventional hobbing process of inserting the rack gear and the saw tooth row, thereby simplifying the processing. In addition, it reduces excessive parts and reduces the number of steps for inserting and assembling the rack gear.

The foregoing description is by way of example only and not by way of limitation. Modifications and alterations made within the scope of the present invention are within the scope of the present invention.

200 retractable linear motion device
110, 110 ', 210 First block
211 first toothed hole
212 First Home
120, 120 ', 220 second block
221 2nd tooth hole
222 2nd Home
130, 130 ', 230 roller retaining unit
231 opening
131, 131 ', 232 rollers
233 First holding unit
234 Second holding unit
235
140, 140 ', 240 power transmission unit
241 convex teeth
150, 150 ', 160, 160' Racks

Claims (11)

A first block having a first toothed groove having a plurality of first toothed holes;
A second block formed with second toothed grooves having a plurality of second toothed holes corresponding to the plurality of first toothed holes, the second toothed grooves corresponding to the first block;
A roller holding unit provided between the first block and the second block; And
And a power transmission unit provided in the roller holding unit and formed in a disk shape and having a plurality of convex teeth contacting the plurality of first toothed holes and the plurality of second toothed holes on an outer circumferential surface thereof,
And the first block moves in correspondence with the second block by the first toothed groove, the power transmission unit, and the second toothed groove. The method according to claim 1,
Wherein the roller retaining unit has a plurality of openings and a plurality of rollers and the convex portions of the plurality of rollers are respectively fixed to the openings so that the plurality of rollers contact the first block and the second block Retractable linear motion device. 3. The method of claim 2,
Wherein the first block has a first groove and the second block has a second groove and is provided so as to correspond to the first groove, the plurality of rollers corresponding to the first groove and the second groove, Wherein the linear motion device is a linear motion device. The method of claim 3,
Wherein the first groove and the second groove are substantially V-shaped. The method of claim 3,
Wherein the first toothed grooves and the second toothed grooves are provided at the bottom of the first groove and the second groove, respectively. 3. The method of claim 2,
Wherein the roller retaining unit is configured such that the first retaining part and the second retaining part are joined to each other and the plurality of openings are formed corresponding to the first retaining part and the second retaining part, Device. The method according to claim 6,
Wherein the first retaining part and the second retaining part are connected by a lock engagement, an adhesive engagement, or a snap engagement. 3. The method of claim 2,
Wherein at least one stopper portion is formed in the periphery of the opening of the roller retaining unit. 9. The method of claim 8,
Wherein the blocking portion is a blocking member or blocking piece. The method according to claim 1,
Wherein the pitch of the plurality of convex teeth corresponds to the pitch of the plurality of first toothed holes and the plurality of second toothed holes and the number of the plurality of first toothed holes and the plurality of second toothed holes is equal to the pitch And the second block is determined according to a relative movement stroke of the block and the second block. 11. The method according to any one of claims 1 to 10,
Wherein the power transmitting unit is a bevel cycloid gear or a bevel involute gear, and the plurality of first toothed holes and the plurality of second toothed holes correspond to bevel holes.

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