KR20130117489A - Roller track gear system - Google Patents

Abstract

PURPOSE: A roller track gear system is provided to minimize tooth interference and tooth non-contact effects which occur in a combination of each system by increasing a potential coefficient, replacing an extending tooth, or removing a tooth. CONSTITUTION: A roller track gear system (T) comprises a cam rack pinion (CRP) system (100), a cam ring gear (CRG) system (200), and a roller pinion gear (RPG) system (300). The CRP system comprises a rack (110) having cam teeth and a runner (400) having a roller or pin teeth. The CRG system comprises an internal gear (210) having cam teeth and a runner having a roller or pin teeth. The RPG system comprises an external gear (310) having cam teeth and a runner having a roller or pin teeth. The roller track gear system configures the track system of three kinds with a combination of two or more of the CRP system, the CRG system, and the RPG system.

Description

Roller Track Gear System {ROLLER TRACK GEAR SYSTEM}

TECHNICAL FIELD The present invention relates to a roller track gear system, and more particularly, to a roller track gear system capable of implementing various track systems and preventing tooth interference and tooth contact.

The gear system, which is one of the power transmission mechanical elements, has a technical advantage of simple structure, accurate power transmission to a desired position, durability and long life, and is widely used as a power transmission means. However, the performance of the gear system can vary greatly depending on the tooth design and the degree of processing, and thus the performance of the overall gear system, such as movement precision, durability and noise and vibration performance, can be determined.

Recently, a gear system using a trochoid-type tooth rather than an involute-type tooth has been introduced to improve gear performance.A representative example is a trocoid-type cycloid reducer (cycloid) used in robots. reducer).

The present invention seeks to provide a roller track gear system capable of minimizing tooth interference or tooth non-contact phenomena while implementing various track systems through a combination of roller or pin gear mechanism systems.

According to a first aspect of the present invention, there is provided a linear conveying means, comprising: a cam rack pinion system comprising a rack having a cam tooth shape and a runner having a roller or pin tooth shape; And a cam ring gear system composed of an internal gear having a cam tooth and a runner having a roller or pin tooth, wherein the runner of the cam rack pinion system and the runner of the cam ring gear system are shared. A roller track gear system may be provided in which the cam rack pinion system and the cam ring gear system are combined.

According to a second aspect of the present invention, there is provided a linear conveying means, comprising: a cam rack pinion system comprising a rack having a cam tooth shape and a runner having a roller or pin tooth shape; And a roller pinion gear system comprising a circumferential gear having a cam tooth and a runner having a roller or pin tooth, wherein the runner of the cam rack pinion system and the runner of the roller pinion gear system are shared. The roller track gear system may be provided by combining the cam rack pinion system and the roller pinion gear system.

According to a third aspect of the present invention, there is provided a rotation conveying means, comprising: a cam ring gear system composed of an internal gear having a cam tooth and a runner having a roller or pin tooth; And a roller pinion gear system comprising a circumferential gear having a cam tooth and a runner having a roller or pin tooth, wherein the runner of the cam ring gear system and the runner of the roller pinion gear system are shared. A roller track gear system can be provided which combines the cam ring gear system and the roller pinion gear system.

In this case, the roller track gear system may be formed to increase the addendum modification coefficient of the cam tooth, in which tooth interference occurs, in order to avoid tooth interference at the transition point of each system.

In addition, the roller track gear system forms an extended tooth that extends the cam tooth of each system by one dimension to the area of another adjacent system on the basis of the switching point, in order to avoid tooth interference or tooth non-contact at the switching point of each system. can do.

In addition, the roller track gear system may be formed to remove a portion having a tooth extension coefficient of 1 or more in front and rear cam teeth of the switching point in order to avoid tooth interference or tooth non-contact at the switching point of each system.

The roller track gear system according to the present invention can implement various track systems that can be driven in a plane by combining a cam rack pinion system as a linear transport means, a cam ring gear system and a roller pinion gear system as rotation feed means.

In addition, through the increase of the potential coefficient, extension tooth replacement, tooth removal, etc., it is possible to avoid the tooth interference and tooth non-contact occurring in the combination of each system and implement an effective track system.

1 is a conceptual diagram illustrating a roller track gear system according to the present invention.
FIG. 2 is a view showing a switching point of a cam rack pinion system and a roller pinion gear system in the roller track gear system shown in FIG. 1.
FIG. 3 is a view showing tooth interference and tooth non-contact at the transition point shown in FIG. 2.
4 shows a first embodiment for avoiding tooth interference.
5 shows a second embodiment for avoiding tooth interference.
6 shows a third embodiment for avoiding tooth interference.

1 is a conceptual diagram illustrating a roller track gear system according to the present invention.

Referring to FIG. 1, the roller track gear system T according to the present invention includes a cam rack pinion system 100, which is a linear transport means, a cam ring gear system 200, and a roller pinion gear system 300, which are rotation transport means. It may include.

Hereinafter, for convenience of description, the roller track gear system T will be abbreviated as 'RTG system T', and the cam rack pinion system 100 will be abbreviated as 'CRP system 100'. In addition, the cam ring gear system 200 will be abbreviated as 'CRG system 200', the roller pinion gear system 300 will be abbreviated as 'RPG system 300'.

The CRP system 100 may be composed of a rack 110 having a cam tooth and a runner 400 having a roller or pin tooth. In addition, the CRG system 200 may be composed of an internal gear 210 having a cam tooth and a runner 400 having a roller or pin tooth. In addition, the RPG system 300 may include an external gear 310 having a cam tooth shape and a runner 400 having a roller or pin tooth shape.

RTG system (T) according to the present invention can configure a variety of track systems that can be driven in a plane by combining the CRP system 100, CRG system 200 and RPG system 300 as described above. More specifically, RTG system (T) according to the present invention through the combination of two or more of the CRP system 100, CRG system 200 and RPG system 300, three track systems as shown in Table 1 below Can be configured.

Cases System combination Inner ring RTG system CRP System + CRG System Paddle RTG System CRP System + RPG System Hybrid RTG System CRG system + RPG system

Referring to Table 1, the RTG system T according to the present invention may include an internal RTG system T1, an external RTG system T2, and a hybrid RTG system T3. have.

Hereinafter, for convenience of description, the inner ring RTG system T1 is abbreviated as 'iRTG system T1', and the outer ring RTG system T2 is abbreviated as 'eRTG system T2', and the hybrid RTG system T3 will be abbreviated as 'hRTG system T3'.

The iRTG system T1 may be configured as a combination of the CRP system 100 and the CRG system 200. In addition, the eRTG system T2 may be configured by a combination of the CRP system 100 and the RPG system 300. In addition, the hRTG system T3 may be configured by a combination of the CRG system 200 and the RPG system 300. At this time, each of the CRP system 100, CRG system 200 and RPG system 300 includes a cam tooth type and runner 400, by sharing the runner 400 having the same specifications between each system, Each system is combined.

In addition, the CRP system 100, which is a linear conveying means, can adjust the length of the straight section by adjusting the number of cam teeth, and the CRG system 200 and the RPG system 300, which are rotational conveying means, have the number of gear teeth in a curved section. According to the rotation angle can be set variable. For example, when switching the 90 ° or 180 ° direction, which is widely used in factory automation, only 1/4 or 1/2 of the CRG system 200 and the RPG system 300 are used in a curved section, so that the whole of these systems is used. The number of gear teeth shall be selected to be a multiple of four or a multiple of two.

Meanwhile, referring again to FIG. 1, the RTG system T according to the present invention may be configured by a combination of two or more of the CRP system 100, the CRG system 200, and the RPG system 300, and is a runner that is a driving unit. The rotational movement of 400 results in a transfer conversion to each system. In this case, tooth interference or tooth non-contact phenomenon may occur at the switching unit of each system.

FIG. 2 is a view showing a switching point of a cam rack pinion system and a roller pinion gear system in the roller track gear system shown in FIG. 1.

FIG. 2 shows a system switching point in the iRTG system T1 in which the CRP system 100 and the CRG system 200 are combined. The roller 410 or the pin (not shown) center of the runner 400 is shown at the switching point. The form matched to this switching line C is shown.

At this time, the roller 410 in contact with the cam teeth 111 of the CRP system 100 in the region of the CRP system 100 is referred to as the first roller 411, and the CRP system 100 and the CRG system 200 The roller 410 located at the turning point will be referred to as a second roller 412. In addition, the roller 410 in contact with the cam tooth 211 of the CRG system 200 in the area of the CRG system 200 will be referred to as a third roller 413.

In this case, when the runner 400 rotates counterclockwise (CCW) based on the turning point, all the rollers 410 participating in the contact are in contact with the cam tooth 211 of the CRG system 200. In contrast, when the runner 400 rotates clockwise (CW), all the rollers 410 participating in the contact come into contact with the cam teeth 111 of the CRP system 100. That is, when the runner 400 rotates counterclockwise (CCW), the first roller 411 moves in contact with the cam tooth 211 of the CRG system 200 although the first roller 411 is in the CRP system 100 region. When 400 rotates clockwise (CW), the third roller 413 is in the region of the CRG system 200 but moves in contact with the cam tooth 111 of the CRP system 100. Accordingly, the runner 400 may not come into contact with the unique teeth of each system in each region of the CRP system 100 or the CRG system 200.

FIG. 3 is a view showing tooth interference and tooth non-contact at the transition point shown in FIG. 2.

3 shows the movement trajectories of the first roller 411 and the third roller 413 when the runner 400 rotates. Referring to this, the first teeth of the runner 400 or the runner 400 of the runner 400 are shown. It can be seen that tooth interference or tooth non-contact occurs in the last tooth of the eviction.

More specifically, when looking at the motion trajectory of the first roller 411 in the CRP system 100 region, the first roller 411 and the cam tooth 111 of the CRP system 100 in accordance with the rotation of the runner 400 It can be seen that the toothed non-contact section P1 is not in contact. In addition, when looking at the motion trajectory of the third roller 413 in the CRG system 200 region, the third roller 413 and the cam tooth 211 of the CRG system 200 region may be formed in accordance with the rotation of the runner 400. It can be seen that the tooth interference section P2 occurs in contact.

Tooth non-contact or tooth interference as described above is generated in the last tooth of the system where the runner 400 is retired and the first tooth of the system in which the runner 400 enters. That is, the transition to each system is started on the basis of the transition point of each system and occurs in the section where the transition ends. In addition, this is not only the case where the CRP system 100 and the CRG system 200 illustrated in FIG. 3 are combined, but also the eRTG system T2 in which the CRP system 100 and the RPG system 300 are combined, or the RPG system ( It may similarly occur in the hRTG system T3 in which the 300 and the CRG system 200 are combined. To summarize the site where such tooth interference and tooth non-contact phenomenon occurs, it is shown in Table 2.

Cases Tooth Interference Generator Tooth non-contact generating part iRTG system Teeth of CRG System Teeth of CRP System eRTG system Teeth of CRP System Teeth of RPG System hRTG system Teeth of CRG System Teeth of RPG System

Referring to Table 2, in the case of the iRTG system T1, tooth interference occurs in the teeth of the CRG system 200, and tooth non-contact occurs in the teeth of the CRP system 100. In addition, in the case of the eRTG system T2, tooth interference occurs in the teeth of the CRP system 100, and tooth non-contact occurs in the teeth of the RPG system 300. In addition, in the case of the hRTG system T3, tooth interference occurs in the teeth of the CRG system 200, and tooth non-contact occurs in the teeth of the RPG system 300.

In the case of toothless contact, there may be a performance difference, but it may not cause a big problem in operation. However, since tooth interference can cause fatal defects such as inoperability, a method for avoiding tooth interference at each system switching point is required.

4 shows a first embodiment for avoiding tooth interference.

4 illustrates a method for avoiding tooth interference in the tooth interference section P2 shown in FIG. 3. Referring to FIG. 4, as a first embodiment for avoiding tooth interference, tooth interference may be avoided by increasing an addendum modification coefficient, which is a design specification of a system in which tooth interference occurs. That is, by increasing the potential coefficient in the region of the CRG system 200 where tooth interference occurs in FIG. 4, tooth interference can be avoided.

Increasing the dislocation coefficient decreases the width of the addendum of the cam tooth 211 and increases the width of the dead endum. Therefore, as the potential coefficient is increased, the width of the tooth line region is reduced, and tooth interference in which the third roller 413 and the cam tooth 211 are in contact with each other can be avoided to some extent.

More specifically, in FIG. 4, G1 represents the cam tooth shape 211 of the existing CRG system 200, and G2 represents the cam tooth shape 211 of the CRG system 200 with the increased potential coefficient. Referring to the G1 and G2, despite the occurrence of tooth interference in the cam tooth 211 of the conventional CRG system 200, in the cam tooth type 211 of the CRG system 200 having increased the potential coefficient of the tooth line area It can be seen that the width is reduced so that tooth interference between the third roller 413 and the cam tooth 211 is avoided.

However, in the case of avoiding tooth interference by increasing the potential coefficient as in the present embodiment, the potential coefficient is different between the systems to be combined, so that problems such as speed difference due to discontinuity of the driving path may be generated when switching the system. It is necessary to pay attention to the selection of.

In the above description, the case where the tooth interference is avoided in the iRTG system T1 in which the CRP system 100 and the CRG system 200 are combined has been described, but the tooth interference avoidance method according to the present embodiment is limited thereto. It is not possible and may be similarly applied to the eRTG system T2 in which the CRP system 100 and the RPG system 300 are combined, or the hRTG system T3 in which the CRG system 200 and the RPG system 300 are combined. have.

5 shows a second embodiment for avoiding tooth interference.

FIG. 5 illustrates a method for avoiding tooth interference and tooth non-contact at the system transition point shown in FIG. 3. Referring to FIG. 5, the present embodiment proposes a method of avoiding tooth interference by changing a cam tooth that is expected to generate tooth interference to an extended tooth. In particular, the present embodiment has a technical advantage that it is possible to solve not only the tooth interference at the system switching point, but also the tooth non-contact phenomenon.

In this case, the extended tooth refers to a tooth in which the cam tooth of each system is extended by one dimension to an area of another adjacent system. That is, in FIG. 5, a tooth in which the cam tooth 111 of the CRP system 100 extends by one dimension to the CRG system 200 region is referred to as a CRP extension tooth 111a and the cam tooth 211 of the CRG system 200. The tooth extending one dimension to the area of the CRP system 100 may be defined as a CRG extension tooth 211a.

Tooth interference and tooth non-contact may occur at the tooth region where the tooth extension coefficient of the tooth before and after the transition line (C) is 1 or more, based on the transition point of each system. In this case, the tooth extension coefficient is a cam tooth design specification of each system, and when this value is 1, it means the tooth height generated based on the pitch angle when designing the tooth. Alternatively, it may mean an intersection point Q between an existing tooth and an extended tooth.

As shown in FIG. 5, in the iRTG system T1 in which the CRP system 100 and the CRG system 200 are combined, a tooth extension factor of 1 or more of the tooth extension coefficient with the runner 400 in which tooth interference or tooth non-contact occurs. Replacement with extended teeth can avoid tooth interference and tooth non-contact.

That is, in the region of the CRP system 100 in contact with the first roller 411, the cam teeth 111 having the tooth extension coefficient of 1 or more are replaced with the CRG extension teeth 211a, and the third rollers 413 are in contact with each other. In the area of the CRG system 200, the cam teeth 211 having the tooth extension coefficient of 1 or more may be replaced with the CRP extension teeth 111 a to implement a system tooth that enables accurate movement contact of the runner 400.

In the above description, the case where the tooth interference is avoided in the iRTG system T1 in which the CRP system 100 and the CRG system 200 are combined has been described, but the tooth interference avoidance method according to the present embodiment is limited thereto. It is not possible and may be similarly applied to the eRTG system T2 in which the CRP system 100 and the RPG system 300 are combined, or the hRTG system T3 in which the CRG system 200 and the RPG system 300 are combined. have.

6 shows a third embodiment for avoiding tooth interference.

FIG. 6 illustrates a method for avoiding tooth interference and tooth non-contact at the system transition point shown in FIG. 3. Referring to FIG. 6, in the present embodiment, at the transition point where tooth interference or tooth non-contact occurs, the portion of the tooth length extension coefficient of 1 or more is removed from the first tooth of the entrance portion of the runner 400 and the last tooth of the eviction portion of the runner 400. Suggest how to.

That is, as shown in FIG. 6, the portion having the tooth length extension coefficient of 1 or more is removed from the first cam tooth 111 to the area of the CRP system 100 based on the switch line C, and the switch line C is used as a reference. In the first cam tooth 211 to the area of the CRG system 200, a portion having a tooth extension coefficient of 1 or more can be removed to avoid tooth interference or tooth non-contact due to the combination of the respective systems. In particular, the present embodiment can be implemented in a relatively simple method compared to the first and second embodiments described above, there is a technical advantage that it is easier to standardize.

In the above description, the case where the tooth interference is avoided in the iRTG system T1 in which the CRP system 100 and the CRG system 200 are combined has been described, but the tooth interference avoidance method according to the present embodiment is limited thereto. It is not possible and may be similarly applied to the eRTG system T2 in which the CRP system 100 and the RPG system 300 are combined, or the hRTG system T3 in which the CRG system 200 and the RPG system 300 are combined. have.

As described above, the roller track gear system T according to the present invention is a cam rack pinion system 100 which is a linear transport means, a cam ring gear system 200 and a roller pinion gear system 300 which are rotational transport means. By combining these, it is possible to implement various track systems that can be driven on a plane. In addition, through the increase of the potential coefficient, extension tooth replacement, tooth removal, etc., it is possible to avoid the tooth interference and tooth non-contact occurring in the combination of each system and implement an effective track system.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, many modifications and changes may be made by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims. The present invention can be variously modified and changed by those skilled in the art, and it is also within the scope of the present invention.

T: roller track gear system
T1: inner ring roller track gear system
T2: paddle roller track gear system
T3: Hybrid Roller Track Gear System
100: cam rack pinion system
200: cam ring gear system
300: roller pinion gear system

Claims (6)

A straight line conveying means comprising: a cam rack pinion system comprising a rack having a cam tooth shape and a runner having a roller or pin tooth shape; And
A rotational conveying means, comprising: a cam ring gear system comprising an internal gear having a cam tooth and a runner having a roller or pin tooth,
The cam track pinion system and the cam ring gear system are combined by sharing the runner of the cam rack pinion system and the runner of the cam ring gear system.
A straight line conveying means comprising: a cam rack pinion system comprising a rack having a cam tooth shape and a runner having a roller or pin tooth shape; And
A rotational feed means, comprising: a roller pinion gear system composed of an external gear having a cam tooth and a runner having a roller or pin tooth,
And the cam rack pinion system and the roller pinion gear system are combined by sharing the runner of the cam rack pinion system and the runner of the roller pinion gear system.
A rotary feed means, comprising: a cam ring gear system composed of an internal gear having a cam tooth and a runner having a roller or pin tooth; And
A rotational feed means, comprising: a roller pinion gear system composed of an external gear having a cam tooth and a runner having a roller or pin tooth,
The cam track gear system and the roller pinion gear system are combined by sharing the runner of the cam ring gear system and the runner of the roller pinion gear system.
The method according to any one of claims 1 to 3,
A roller track gear system, characterized by increasing a predetermined modification coefficient of the cam tooth shape in which tooth interference occurs, in order to avoid tooth interference at the transition point of each system.
The method according to any one of claims 1 to 3,
In order to avoid tooth interference or tooth non-contact at the transition point of each system, the roller track gear system is formed by extending the cam tooth of each system by one dimension to the area of another adjacent system on the basis of the transition point. .
The method according to any one of claims 1 to 3,
A roller track gear system, wherein a portion having a tooth extension coefficient of 1 or more is removed from front and rear cam teeth of a switching point in order to avoid tooth interference or tooth non-contact at the switching point of each system.

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