JP2016020730A - Gear device series - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of kinds of regulation members of outer pins, and to reduce a manufacturing cost of a gear device as a whole in a series.SOLUTION: A gear device series comprises an inner tooth gear in which inner teeth are constituted of outer pins, and a regulation member which abuts on regulated parts arranged at the outer pins, and regulates the movement of the outer pins in a radial direction. The gear device series also comprises, as gear devices, a first gear device 100 into which a first outer pin 140 having a first distance r140 that is a distance from a center of a first inner tooth gear 112 up to a regulated part is embedded; and a second gear device 200 into which a second outer pin 240 having a second distance r240A which is shorter than the first distance in a distance from a center of a second inner tooth gear 212 up to the regulated part is embedded. A regulation member A10 has a first regulation part A11 which is shared in the first and second gear devices, abuts on the first outer pin, and regulates the radial movement, and a second regulation part A12 which abuts on the second outer pin, and regulates the radial movement.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a series of gear devices.

  Patent Document 1 discloses a gear device that internally engages an internal gear while the external gear swings and extracts the relative rotation between the external gear and the internal gear as a deceleration output. The internal teeth of the internal gear are constituted by external pins. In this gear device, the outer pin is composed of a pin-shaped member, and is rotatably incorporated in an arc groove formed in the internal gear main body.

  The outer pin is restricted from moving in the radial direction by a pin pressing member (restricting member) so as to be able to rotate stably. The pin pressing member is formed by a ring-shaped member, and abuts against the outer pin from the radially inner side to restrict the radial movement of the outer pin.

JP 2006-22829 A (FIG. 1)

  In order to meet various user needs, a plurality of gear devices having different sizes (transmission capacities) and reduction ratios are often provided as “series”. The outer pins (that is, the internal teeth of the internal gear) have different diameters when, for example, different reduction ratios are to be realized. Then, the shortest distance from the center of the internal gear to the outer pin at the axial position where the restricting member is arranged also differs. This means that the diameter of the restricting member that restricts the radial movement of the outer pin differs for each type of outer pin.

  Therefore, it is necessary to prepare different types of regulating members corresponding to the diameters of all types of outer pins, which increases the number of types of regulating members, and consequently increases the manufacturing cost of the gear device of the entire series. was there.

  The present invention has been made to solve such a problem, and it is an object of the present invention to reduce the number of types of outer pin regulating members and to reduce the manufacturing cost of the gear device of the entire series. .

  The present invention provides a gear device comprising: an internal gear whose internal teeth are configured by external pins; and a regulating member that abuts against a regulated portion provided on the external pin and regulates radial movement of the external pin. The first gear device in which a first outer pin having a first distance from the center of the first internal gear to the restricted portion is incorporated as the gear device, and a second internal gear A second gear device in which a second outer pin having a second distance smaller than the first distance is incorporated from the center of the first gear device to the regulated portion, and the regulating member includes the first gear device and the second gear device. A first restricting portion that is shared by the second gear device and abuts on the first outer pin to restrict radial movement; a second restricting portion that abuts on the second outer pin and restricts radial movement; The above-described problem is solved by adopting a configuration having the above.

  In the present invention, the restricting member abuts on the first outer pin of the first gear device and restricts the radial movement, and the restricting member abuts on the second outer pin of the second gear device and moves in the radial direction. And a second restricting portion for restricting.

  For this reason, the restriction member, which has conventionally been constituted by different types of members for the first and second gear devices having different outer pins, can be shared by the first and second gear devices, and the entire series is restricted. The number of types of members can be reduced.

  According to the present invention, it is possible to reduce the number of types of restricting members for the outer pin, and to reduce the manufacturing cost of the gear device of the entire series.

Sectional drawing which shows the structure of the 1st gear apparatus of the series of the gear apparatus which concerns on an example of embodiment of this invention. Sectional drawing which shows the structure of the second gear device (A) The principal part expanded sectional view of FIG. 1, (B) The principal part expanded sectional view of FIG. Sectional drawing which shows the structure of the 1st gear apparatus of the series of the gear apparatus which concerns on an example of other embodiment of this invention. Sectional drawing which shows the structure of the second gear device (A) The principal part expanded sectional view of FIG. 4, (B) The principal part expanded sectional view of FIG. Sectional drawing which shows the structure of the 1st gear apparatus of the series of the gear apparatus which concerns on an example of further another embodiment of this invention. Sectional drawing which shows the structure of the second gear device (A) The principal part expanded sectional view of FIG. 7, (B) The principal part expanded sectional view of FIG. Sectional drawing which shows the structure of the 1st gear apparatus of the series of the gear apparatus which concerns on an example of further another embodiment of this invention. Sectional drawing which shows the structure of the second gear device (A) The principal part expanded sectional view of FIG. 10, (B) The principal part expanded sectional view of FIG. Sectional drawing which shows the structure of the 1st gear apparatus of the series of the gear apparatus which concerns on an example of further another embodiment of this invention. Sectional drawing which shows the structure of the second gear device (A) The principal part expanded sectional view of FIG. 13, (B) The principal part expanded sectional view of FIG.

  Hereinafter, the configuration of a series of gear devices according to an example of an embodiment of the present invention will be described in detail with reference to the drawings.

  The gear device series in the present invention includes a first gear device and a second gear device as its constituent elements.

  1 is a cross-sectional view showing a configuration of a first gear device of a series of gear devices according to an example of an embodiment of the present invention, FIG. 2 is a cross-sectional view showing a configuration of the second gear device, and FIG. ) Is an enlarged cross-sectional view of the main part of FIG. 1, and FIG. 3B is an enlarged cross-sectional view of the main part of FIG.

  The first gear device and the second gear device have a common configuration except that the structure near the outer pin of the internal gear is different. Here, first, the overall configuration will be described focusing on the first gear device, and then, focusing on the difference between the first gear device and the second gear device. For convenience, each member of the first gear device is given a “first” distinguishing word and a reference number in the 100s, and each member of the second gear device is given a “second” distinguishing word. The members corresponding to the members of the first gear device are given the same reference numerals in the 200s as the last two digits.

  With reference to FIG. 1 and FIG. 3 (A), the 1st gear apparatus 100 is a gear apparatus called an eccentric rocking | fluctuation type. The first gear device 100 includes a first internal gear 112 and a first external gear 114 that meshes internally with the first internal gear 112.

  The first input shaft 122 of the first gear device 100 is disposed at the center c112 of the first internal gear 112, and is integrated with the motor shaft M1a of the motor M1. A first eccentric shaft 130 is connected to the first input shaft 122 via a first key 128. Two first eccentric bodies 132 are integrally formed on the first eccentric body shaft 130. On the outer periphery of each first eccentric body 132, the two first external gears 114 are incorporated in a swingable manner via first eccentric body bearings 134, respectively.

  The reason why the first external gears 114 are provided in parallel in the axial direction is that the necessary transmission capacity is secured and the eccentric phase is shifted (180 ° in the present embodiment) to ensure the rotational balance. is there. The axial interval between the first external gears 114 is regulated by the first insertion wheel 115.

  The external tooth form of the first external gear 114 is a trochoidal tooth form, and the internal tooth form of the first internal gear 112 is an arc tooth form. The internal teeth of the first internal gear 112 are configured by first external pins 140. In the gear device series according to the present embodiment, the first outer pin 140 of the first gear device 100 and the second outer pin 240 of the second gear device 200 are slightly different in configuration (detailed later). .

  The number of internal teeth of the first internal gear 112 (the number of first external pins 140) is slightly larger (only 1 in this example) than the number of external teeth of the first external gear 114.

  The first external gear 114 includes a first through hole 114A that penetrates the first external gear 114 at a position offset from the center c114. The first inner pin 116 penetrates (freely fit) into the first through hole 114A. A first inner roller 118 is fitted on the outer periphery of the first inner pin 116 as a sliding acceleration member. A gap corresponding to twice the amount of eccentricity of the first eccentric body 132 is secured between the first inner roller 118 and the first through hole 114A.

  A first flange body 150 that is integrated with the first inner pin 116 is disposed on the axial side portion of the first external gear 114. The first flange body 150 is integrated with the first output shaft 152.

  The first casing 154 of the first gear device 100 according to this embodiment includes a first main casing body 156 integrated with a first internal gear main body 138, which will be described later, of the first internal gear 112, and the first main casing. The first sub casing body 158 connected to the load side (anti-motor side) of the body 156 and the first cover casing body 160 connected to the anti-load side (motor side) of the first main casing body 156 are provided. .

  Here, the speed reduction action of the first gear device 100 will be briefly described. This deceleration action is basically the same in the second gear device 200.

  When the first input shaft 122 integrated with the motor shaft M1a is rotated by the rotation of the motor shaft M1a of the motor M1, the first eccentric body shaft 130 is rotated through the first key 128. When the first eccentric body shaft 130 rotates, the first eccentric body 132 rotates, and the first external gear 114 swings and rotates via the first eccentric body bearing 134. As a result, a phenomenon occurs in which the meshing positions of the first external gear 114 and the first internal gear 112 are sequentially shifted, and each time the first input shaft 122 rotates once, the first external gear 114 The gear rotates relative to the first internal gear 112 by the difference in the number of teeth from the internal gear 112, that is, “one tooth”. This relative rotational component is transmitted to the first flange body 150 via the first inner roller 118 and the first inner pin 116, and the first output shaft 152 integrated with the first flange body 150 rotates. As a result, a reduction with a reduction ratio corresponding to (the number of teeth difference between the first internal gear 112 and the first external gear 114) / (the number of teeth of the first external gear 114) can be realized.

  Next, with reference mainly to FIG. 3, the first gear device 100 and the second gear device 200 in the gear device series of the present embodiment will be described in more detail.

  The first internal gear 112 of the first gear device 100 is incorporated into the first internal gear main body 138 integrated with the first main casing body 156 of the first casing 154, and the first internal gear main body 138. And a first outer pin 140. As already described, the first outer pin 140 constitutes an internal tooth of the first internal gear 112. Specifically, an arc groove 138A is formed in the first internal gear main body 138, and the first outer pin 140 is composed of a single pin member rotatably disposed in the arc groove 138A. .

  On the other hand, the second internal gear 212 of the second gear device 200 is also integrated with the second internal gear main body 238 integrated with the second main casing body 256 of the second casing 254, and the second internal gear main body 238. And a second outer pin 240 that constitutes the internal teeth of the second internal gear 212. However, the second outer pin 240 of the second gear device 200 is rotatably fitted to the pin member 240A disposed in the arc groove 238A formed in the second internal gear main body 238 and the pin member 240A. It is comprised with the roller member 240B. A portion of the roller member 240B meshes with the second external gear 214. The first main casing body 256 also serving as the second internal gear main body 238 is formed with two grooves 256D for accommodating the roller member 240B.

  As described above, in the present invention, “internal gears whose internal teeth are constituted by external pins” include, for example, “single pin” as in the first internal gear 112 of the first gear device 100 in the present embodiment. “Internal gears whose internal teeth are configured by only external pins” and “the second internal gear 212 of the second gear device 200 in the present embodiment” Both of them include an “internal gear whose internal teeth are constituted by external pins by a combination of the roller members that are made”.

  The first gear device 100 and the second gear device 200 in the gear device series according to the present embodiment have different reduction ratios. That is, the second gear device 200 has a reduced speed ratio than the first gear device 100. The first gear device 100 having a high reduction ratio has a large number of internal teeth (the number of first outer pins 140) of the first internal gear 112 and a tooth height (the diameter d140 of the first outer pin 140). small. On the other hand, the second gear device 200 having a reduced speed ratio has a smaller number of internal teeth (the number of second outer pins 240) of the second internal gear 212 than the first gear device 100, and the teeth. The length (the diameter d240B of the roller member 240B of the second outer pin 240) is large (d140 <d240B).

  The shortest distance from the center c112 of the first internal gear 112 to the first outer pin 140 (at an axial position where a regulating member A10 described later is disposed) is the first distance r140, and the second internal gear 212 is the same. When the shortest distance from the center c212 to the pin member 240A of the second outer pin 240 is the second distance r240A, the second distance r240A is smaller than the first distance r140 (r140> r240A). The diameter of the pin member 240A is d240A. Assuming that the portion of the first outer pin 140 and the second outer pin 240 where the restricting member A10 abuts is the “restricted portion”, the first distance r140 is the distance from the center c112 of the first internal gear 112 to the restricted portion. The second distance r240A is a distance from the center c212 of the second internal gear 212 to the restricted portion.

  In other words, the first outer pin 140 having the shortest distance from the center c112 of the first internal gear 112 at the axial position where the restricting member A10 is disposed is incorporated in the first gear device 100. In the second gear device 200, the second distance r240A having the shortest distance from the center c212 of the second internal gear 212 at the axial position where the restricting member A10 is disposed is smaller than the first distance r140. Two outer pins 240 are incorporated.

  The axial length of the first outer pin 140 is twice the axial length LA11 of the first restricting portion A11 of the restricting member A10 to be described (2 · LA11), rather than the axial length of the second outer pin 240. Is as long as

  In the present gear device series, the same regulating member A10 is shared by both the first gear device 100 and the second gear device 200, and the first outer pin 140 and the second outer pin 240 are moved in the radial direction by the regulating member A10. Is regulated.

  The regulating member A10 is disposed at the end of the first outer pin 140 or the second outer pin 240 on the axially opposite load side. For convenience, the regulating member A10 disposed at the end portion on the axial direction antiload side will be hereinafter referred to as an antiload side regulating member A10.

  The entire anti-load-side regulating member A10 is formed in a ring shape, and integrally has a surface parallel to the axis and a surface perpendicular to the axis.

  As a surface parallel to the shaft, the anti-load-side regulating member A10 abuts on the first outer pin 140 of the first gear device 100 to regulate the radial movement, and the second gear device 200 has a first regulating portion A11. 2 has a second restricting portion A12 that abuts against the outer pin 240 and restricts radial movement.

  As a surface perpendicular to the shaft, the anti-load-side regulating member A10 includes an inner roller end surface regulating portion A13 that regulates the axial movement of the first inner roller 118 or the second inner roller 218, the first external gear 114, or the second gear. The external gear end surface restricting portion A14 that restricts the axial movement of the external gear 214, the second outer pin end face restricting portion A15 that restricts the axial movement of the second outer pin 240, and the anti-load side restricting member A10 itself. And a positioning contact portion A16 that defines an axial position.

  Hereinafter, the structure of each part A11-A16 is demonstrated in detail.

  The first restricting portion A11 of the anti-load side restricting member A10 is formed by a surface parallel to the shaft at the end portion on the anti-load side restricting member A10 in the axial direction anti-load side. The distance rA11 from the center cA10 of the non-load-side regulating member A10 to the first regulating portion A11 is from the center c112 of the first internal gear 112 of the first gear device 100 (at the axial position where the regulating member A10 is disposed). It is set to be the same as the shortest distance to the first outer pin 140 (that is, the first distance r140) (rA11 = r140). With this setting, when the anti-load side regulating member A10 is incorporated into the first gear device 100, the first regulating part A11 of the anti-load side regulating member A10 is connected to the first outer pin 140 (the regulated part). The radial movement of the first outer pin 140 can be restricted at the end portion on the axially opposite load side.

  The second restriction portion A12 of the anti-load-side restriction member A10 is formed by a surface parallel to the axis and aligned with the first restriction portion A11 in the axial direction. The distance rA12 from the center cA10 of the non-load-side regulating member A10 to the second regulating portion A12 is from the center c212 of the second internal gear 212 of the second gear device 200 (at the axial position where the regulating member A10 is disposed). It is set to be the same as the shortest distance to the second outer pin 240 (that is, the second distance r240A) (rA12 = r240A). With this setting, the second restricting portion A12 abuts on the second outer pin 240 (the restricted portion thereof) when incorporated in the second gear device 200, and the radial movement of the second outer pin 240 is axial. It can be regulated at the end on the load side.

  In this embodiment, the axial length of the first restricting portion A11 is LA11. Therefore, the area sA11 of the first restricting portion A11 is 2 · π · rA11 · LA11. The axial length of the second restricting portion A12 is LA12. Accordingly, the area sA12 of the second restricting portion A12 is 2 · π · rA12 · LA12.

  That is, in the anti-load side regulating member A10 according to the present embodiment, the area sA11 of the first regulating part A11 and the area sA12 of the second regulating part A12 are different (sA11 ≠ sA12). Specifically, the area sA12 of the second restricting portion A12 is larger than the area sA11 of the first restricting portion A11 (sA11 <sA12).

  The inner roller end surface regulating portion A13 of the anti-load side regulating member A10 is formed by a surface perpendicular to the axis at the radially inner end of the anti-load side regulating member A10. The inner roller end surface restricting portion A13 contacts the entire axial end surface of the first inner roller 118 or the second inner roller 218, and restricts the movement of the first inner roller 118 or the second inner roller 218 toward the axially opposite load side. doing.

  The external gear end surface restricting portion A14 of the anti-load side restricting member A10 is formed by a surface perpendicular to the shaft on the radially outer side of the inner roller end surface restricting portion A13. The external gear end face restricting portion A14 is provided on the antiload side end face of the first external gear 114 on the antiload side or the antiload side end face of the second external gear 214 (of the two first external gears 114). It abuts and restricts the movement of the first external gear 114 or the second external gear 214 toward the axially opposite load side.

  The second outer pin end surface restricting portion A15 of the anti-load side restricting member A10 is formed by a surface perpendicular to the axis at the step portion between the first restricting portion A11 and the second restricting portion A12. The axial end surface 240E1 on the non-load side of the second outer pin 240 of the second gear device 200 is in contact with the second outer pin end surface restricting portion A15. The movement of the second outer pin 240 toward the anti-load side in the axial direction is restricted by the contact between the axial end surface 240E1 of the second outer pin 240 and the second outer pin end surface restricting portion A15.

  The movement of the second outer pin 240 on the axial load side is regulated by the contact between the load-side axial end surface 240E2 of the second outer pin 240 and the pressing surface 258A of the second subcasing body 258. Incidentally, in this embodiment, the restriction of the axial movement of the first outer pin 140 is that the axial end surface 140E1 on the opposite side of the first outer pin 140 abuts against the pressing surface 160A of the first cover casing body 160, The load side axial end surface 140E2 is brought into contact with the pressing surface 158B of the first sub-casing body 158.

  The positioning contact portion A16 of the anti-load-side regulating member A10 is formed by a surface perpendicular to the axis at the axial end portion of the first regulating portion A11. The anti-load-side regulating member A10 is fitted on the first protrusion 160P of the first cover casing body 160 or the second protrusion 260P of the second cover casing body 260. At this time, the positioning contact portion A16 is in contact with the pressing surface 160A of the first cover casing body 160 or the pressing surface 260A of the second cover casing body 260, and the axially antiload side of the antiload side regulating member A10 itself. Restrict movement to Thereby, the position where the anti-load-side regulating member A10 is incorporated into the first gear device 100 or the second gear device 200 is defined.

  The movement restriction of the anti-load side regulating member A10 itself toward the axial load side is performed by contacting the inner roller end surface regulating portion A13 with the first inner roller 118 or the second inner roller 218, or the external gear. This is performed by contact between the end surface regulating portion A14 and the first external gear 114 or the second external gear 214.

  On the other hand, in the series of gear devices according to the present embodiment, both the first and second gear devices 100 and 200 support not only the anti-load side regulating member A10 but also the radial movement of the first outer pin 140. A member B10 is provided, and a support member (another support member) B20 different from the support member B10 that restricts the radial movement of the second outer pin 240 is provided.

  Specifically, in the present embodiment, as the support member B10, the axial end face of the first and second subcasing bodies 158 and 258 is provided on the axial end face of the first outer pin 140 on the side opposite to the load (first , Annular grooves (supporting portions) 158C and 258C (integrated with the second sub casing bodies 158 and 258) are formed. Further, as other support members B20, through holes 156C and 256C are formed in the first and second main casing bodies 156 and 256 at the axial end portions on the opposite side of the first and second outer pins 140 and 240, respectively. ing. The support member B10 (annular groove 258C) formed on the second sub casing body 258 side does not contribute to the support of the second outer pin 240 of the second gear device 200. Further, the other support member B20 (through hole 156C) formed on the first sub casing body 158 side does not contribute to the support of the first outer pin 140 of the first gear device 100.

  Next, the operation of the series of gear devices according to this embodiment will be described.

  In the series of gear devices according to the present embodiment, the anti-load-side regulating member A10 abuts on the first outer pin 140 and the second outer pin 240 and the first restricting portion A11 that restricts radial movement. And a second restricting portion A12 that restricts movement in the radial direction. For this reason, the axial end of the first outer pin 140 of the first gear device 100 on the side opposite to the load side is restricted from moving in the radial direction by the first regulation part A11 of the anti-load side regulation member A10, while the second gear unit. The axial end of the second outer pin 240 on the anti-load side of the second outer pin 240 is also restricted from moving in the radial direction by the second restricting portion A12 of the anti-load side restricting member A10. Therefore, the anti-load-side regulating member A10 restricts the radial movement of the axial end of the first outer pin 140 on the anti-load side and the radial movement of the axial end of the second outer pin 240 on the anti-load side. Can be shared by the first gear device 100 and the second gear device 200 with respect to both of the restrictions.

  That is, the first distance r140 of the first outer pin 140 of the first gear device 100 and the second distance r240A of the second outer pin 240 of the second gear device 200 (at the axial position where the regulating member A10 is disposed). In spite of being different, the radial movement of the first outer pin 140 of the first gear device 100 is restricted and only the second gear device 200 is produced by preparing and preparing the single anti-load side regulating member A10. The radial movement of the second outer pin 240 can also be restricted.

  Therefore, there is no need to manufacture and prepare different types of (anti-load side) regulating members for the first gear device 100 and the second gear device 200, respectively, and the number of types of regulating members can be halved as a whole series. Manufacturing costs and inventory costs can be reduced.

  In the present embodiment, the following effects are further obtained.

  As already described, the first and second gear devices 100 and 200 according to this series include the first inner roller 118 or the second inner roller 218, but the anti-load side regulating member A10 has the first, An inner roller end surface regulating portion A13 that regulates the axial movement of the second inner rollers 118 and 218 is integrally provided. Therefore, it is not necessary to separately provide a member for restricting the axial movement of the first and second inner pins 116 and 216, and the number of parts can be further reduced. Further, the first and second restricting portions A11 and A12 are configured by surfaces parallel to the shaft, but the inner roller end surface restricting portion A13 is configured by a surface perpendicular to the shaft. For this reason, the anti-load-side regulating member A10 is integrally provided with a surface parallel to the shaft and a surface perpendicular to the shaft, so that high rigidity can be secured in terms of shape, and the first and second regulating portions. The regulation function in A11 and A12 can be further improved.

  The anti-load-side regulating member A10 not only includes the first and second regulating portions A11, A12 and the inner roller end surface regulating portion A13, but also the first external gear 114 or the second outer gear. The external gear end face restricting portion A14 that restricts the axial movement of the toothed gear 214 and the second outer pin end face restricting portion A15 that restricts the movement of the second outer pin 240 toward the opposite side in the axial direction are integrally formed. I have. For this reason, a single member also has a very large number of functions, and the number of parts in the entire gear device is further reduced.

  In the present embodiment, the area sA11 of the first restriction portion A11 and the area sA12 of the second restriction portion A12 of the anti-load side restriction member A10 are different. Therefore, more rational movement restriction design is flexibly performed according to the specific configuration in the vicinity of the first outer pin 140 of the first gear device 100 and the vicinity of the second outer pin 240 of the second gear device 200. be able to.

  For example, in this embodiment, the area sA12 of the second restricting portion A12 is set larger than the area sA11 of the first restricting portion A11. As described above, in the present embodiment, the first outer pin 140 forms an internal tooth by a single-piece member. The second outer pin 240 constitutes an inner tooth by a pin member 240A and a roller member 240B that is rotatably fitted to the pin member 240A. Therefore, if the pin member 240A is not assembled in a stable state, the second outer pin 240 may cause interference or abnormal noise in the movement of the pin member 240A and the movement of the roller member 240B. In the present embodiment, since the area sA12 of the second restricting portion A12 is set larger than the area sA11 of the first restricting portion A11, the restriction of the second outer pin 240 can be made more stable, The possibility that such abnormal noise occurs in the two outer pins 240 can be further reduced.

  In the present embodiment, in addition to the anti-load-side regulating member A10, the supporting member B10 (annular groove 158C) that regulates the radial movement of the first outer pin 140 and the radial movement of the second outer pin 240 are also provided. Is provided with another support member B20 (through hole 256C).

  Therefore, the first outer pin 140 of the first gear device 100 has its axial end on the anti-load side restricted in radial movement by the first restricting portion A11 of the anti-load-side restricting member A10, and at the load side. The axial movement of the axial end is restricted by the support member B10 (annular groove 158C) formed integrally with the first sub-casing body 158. Therefore, the first outer pin 140 can restrict the radial movement of the first outer pin 140 in a very stable state at both end portions in the axial direction by the restriction member A10 and the support member B10.

  Further, the second outer pin 240 of the second gear device 200 has its axial end on the anti-load side restricted in the radial direction by the second restricting portion A12 of the anti-load-side regulating member A10, and at the load side. The axial end is inserted into another support member B20 (through hole 256C) formed in the second main casing body 256, thereby restricting radial movement. Therefore, the second outer pin 240 can also regulate the radial movement in a very stable state at both axial ends by the regulating member A10 and the other support member B20.

  In the end, both the first outer pin 140 of the first gear device 100 and the second outer pin 240 of the second gear device 200 are provided with only one common anti-load-side regulating member A10, and the respective axial directions The movement in the radial direction can be stably regulated at both end portions.

  In particular, the second outer pin 240 has an area sA12 of the second restricting portion A12 of the antiload-side restricting member A10 larger than an area sA11 of the first restricting portion A11 on the axially antiload side, and The axial load side is also supported in the circumferential direction by another support member (through hole) B20 that covers the entire circumference of the pin member 240A. Therefore, in particular, the roller member 240B of the second outer pin 240 that rotates at a high speed (small reduction ratio) can be stably rotated.

  4 is a cross-sectional view showing a configuration of a first gear device of a series of gear devices according to an example of another embodiment of the present invention, FIG. 5 is a cross-sectional view showing a configuration of the second gear device, and FIG. 4A is an enlarged cross-sectional view of the main part of FIG. 4, and FIG. 6B is an enlarged cross-sectional view of the main part of FIG. In the following description of other embodiments, members corresponding to those of the previous embodiment are appropriately denoted by the same reference numerals, and redundant description is omitted.

  In the embodiment shown in FIGS. 4 to 6, the gear device is configured such that the radial movement of the first and second outer pins 140 and 240 is performed at the end portion on the axial load side in addition to the above-described anti-load side regulating member A10. A load-side regulating member (second regulating member) A20 to be regulated is provided.

  If it demonstrates more concretely, about anti-load side control member A10, it is set as the same structure as anti-load side control member A10 of previous FIGS. 1-3. On the other hand, the load side regulating member A20 includes first, second regulating portions A21, A22, a second outer pin end surface regulating portion A25, and a positioning contact portion A26 having the same configuration as the anti-load side regulating member A10. ing. However, although the load side regulating member A20 is formed at the end portion in the axial direction of the load side regulating member A20 with respect to the external gear end surface regulating portion A24, the inner roller end surface regulating portion is not provided. The load-side regulating member A20 is incorporated symmetrically (with the second regulating portion A22 positioned on the inner side in the axial direction of the first regulating portion A21) with the mounting direction reversed from that of the anti-load-side regulating member A10.

  In the gear device series according to the embodiment of FIGS. 4 to 6, the same operation as that of the anti-load-side regulating member A10 in the previous embodiment is performed using the first outer pin 140 and the second pin of the first gear device 100. It can be obtained symmetrically on both axial sides of the second outer pin 240 of the gear device 200.

  4 to 6, the manufacturing cost can be further reduced (because the first and second casings 154 and 254 are not required to form the support member B10 and other support members B20). The effect is obtained.

  Since other configurations are the same as those of the previous embodiment shown in FIGS. 1 to 3, the same reference numerals are given to corresponding portions in the drawings, and redundant description is omitted.

  FIG. 7 is a cross-sectional view showing a configuration of a first gear device of a series of gear devices according to an example of still another embodiment of the present invention, and FIG. 8 is a cross-sectional view showing a configuration of the second gear device, FIG. 9A is an enlarged cross-sectional view of the main part of FIG. 7, and FIG. 9B is an enlarged cross-sectional view of the main part of FIG.

  7 to 9, in the embodiment of FIGS. 4 to 6, the load side regulating member A <b> 20 arranged on the load side in the axial direction of the first and second outer pins 140 and 240 is the axial direction. The anti-load side regulating member A30 on the anti-load side is also utilized. That is, in this embodiment, the anti-load side regulating member A30 and the load side regulating member A20 are the same member (A20 = A30).

  In other words, in the embodiment shown in FIGS. 7 to 9, the function of the inner roller end face restricting portion A13 provided integrally with the restricting member A10 shown in FIGS. 1 to 3 is used as a dedicated inner roller end face pressing member C10. I am trying to get it. Also, the function of the external gear end surface restricting portion A14 integrally provided in the restricting member A10 of FIGS. 1 to 3 is that the first and second projecting portions 160Q of the first and second cover casing bodies 160 and 260, The first and second protrusions 160Q and 260Q restrict the movement of the first and second external gears 114 and 214 toward the anti-load side in the axial direction. As described above, the regulating member according to the present invention does not necessarily include the inner roller end surface regulating unit and the external gear end surface regulating unit.

  According to the embodiment of FIGS. 7 to 9, since the configurations of the anti-load side regulating member A30 and the load side regulating member A20 are the same, the number of types of regulating members can be further reduced. Further, the axial direction regulation of the inner roller end face is performed by the inner roller end face pressing member C10 that is different from the regulating members A20, A30 that restrict the radial movement of the first and second outer pins 140, 240. The shape becomes simple and the manufacturing cost can be reduced.

  Since other configurations are the same as those in the previous embodiment shown in FIGS. 4 to 6, the same reference numerals are given to corresponding portions in the drawings, and redundant description is omitted.

  FIG. 10 is a cross-sectional view showing a configuration of a first gear device 100 in a series of gear devices according to an example of still another embodiment of the present invention. FIG. 11 is a cross-sectional view showing a configuration of the second gear device. 12A is an enlarged cross-sectional view of the main part of FIG. 10, and FIG. 12B is an enlarged cross-sectional view of the main part of FIG.

  The embodiment shown in FIGS. 10 to 12 can be regarded as a modification of the embodiment shown in FIGS.

  That is, also in the gear device series according to the embodiment of FIGS. 10 to 12, the first gear device 100 includes the first outer side in addition to the anti-load side regulating member A <b> 10 as in the embodiment of FIGS. 1 to 3. A support member B10 that restricts the radial movement of the pin 140 is provided. In addition to the anti-load-side regulating member A10, the second gear device 200 includes another support member B30 that is different from the support member B10 that regulates the radial movement of the second outer pin 240.

  10 to 12, the specific configuration of the other support member B <b> 30 is different from that of the other support member B <b> 20 in the previous embodiment of FIGS. 1 to 3. That is, in the embodiment of FIGS. 10 to 12, the other support member B <b> 30 is configured by the second insertion wheel (interval regulating member) 217.

  More specifically, in the embodiments described so far (the embodiments from FIG. 1 to FIG. 9), the first insertion wheel that does not contact the first outer pin 140 in the axial interval of the first external gear 114. 115, the axial interval of the second external gear 214 is restricted by the second insertion wheel 215 that does not contact the second outer pin 240.

  However, in the embodiment of FIGS. 10 to 12, in particular, the second insert wheel 215 is changed to the second insert wheel 217, and the radius r 217 of the outer periphery of the second insert wheel 217 is changed to the second outer pin 240. It is made to correspond to the 2nd distance r240A (r217 = r240A). Thereby, the 2nd insertion wheel 217 can be shared as "other regulating member B30" which regulates radial movement of the 2nd outer pin 240. For this reason, the first and second main casing bodies 156 and 256 of the first and second gear devices 100 and 200 in the embodiment of FIGS. 10 to 12 are penetrated to constitute another regulating member (B20). No holes are formed.

  In the embodiment of FIGS. 10 to 12, by using the second insertion wheel 217 as “another support member”, other support members (through holes) in the first and second main casing bodies 156 and 256 are used. The formation of is omitted, and the cost is reduced accordingly.

  Since other configurations are the same as those of the previous embodiment shown in FIGS. 1 to 3, the same reference numerals are given to corresponding portions in the drawings, and redundant description is omitted.

  13 is a cross-sectional view showing a configuration of a first gear device of a series of gear devices according to an example of still another embodiment of the present invention, and FIG. 14 is a cross-sectional view showing a configuration of the second gear device, FIG. 15 (A) is an enlarged cross-sectional view of the main part of FIG. 13, and FIG. 15 (B) is an enlarged cross-sectional view of the main part of FIG.

  The embodiment shown in FIGS. 13 to 15 can be regarded as a modification of the embodiment shown in FIGS.

  That is, in the series of gear devices according to the present embodiment, the anti-load side regulating member disposed on the axial anti-load side of the first and second outer pins 140 and 240 in the embodiments of FIGS. A30 is changed to the anti-load side regulating member A40 integrated with the first and second cover casing bodies 160, 260. That is, the first and second cover casing bodies 160 and 260 (including the anti-load-side regulating member A40) in the embodiment of FIGS. 13 to 15 are the same as the anti-load-side regulating member A30 of the embodiment of FIGS. As the first restricting portion A41 corresponding to the first restricting portion A31, first stepped portions 160M and 260M are integrally provided. Furthermore, the first and second cover casing bodies 160 and 260 integrally have second step portions 160N and 260N as a second restriction portion A42 corresponding to the second restriction portion A32 of the anti-load side restriction member A30. ing.

  As described above, in the present invention, the regulating member does not necessarily need to be configured as an independent (single) member, and may be integrated with the casing body or the like. According to the embodiment of FIGS. 13 to 15, for example, independent regulating members can be completely omitted on the axially opposite load side of the first and second outer pins 140 and 240.

  Since other configurations are the same as those of the previous embodiment shown in FIGS. 7 to 9, the same reference numerals are given to corresponding portions in the drawings, and redundant description is omitted.

  In each of the above embodiments, only the second outer pin of the second gear device is configured by the pin member and the roller member. However, as already explained, both the first outer pin of the first gear device and the second outer pin of the second gear device are constituted by only the pin member of the outer pin of the internal gear according to the present invention. May be. Conversely, both the first outer pin and the second outer pin may be configured by a pin member and a roller member. When the outer pin is composed of a pin member and a roller member, the restricting member restricts the radial movement of the pin member with a small rotation amount (not the roller member) as in the above-described embodiment. It is good to do.

  Further, in the above embodiment, there is a series of gear devices each including only two types of gear devices, that is, a first gear device having a first outer pin and a second gear device having a second outer pin. Although illustrated, the gear device series according to the present invention is naturally applicable to a series provided with more types of gear devices as components. For example, according to the above configuration, a first restricting portion that abuts on the first outer pin and restricts radial movement, and a second restricting portion that abuts on the second outer pin and restricts radial movement. By providing “three types” of restricting members, it is possible to restrict the radial movement of a total of six types of outer pins. Further, the restriction member of the restriction member is not limited to only two (two steps) of the first restriction member and the second restriction member. For example, a third restriction member, a fourth restriction member,... Thus, it is possible to correspond to more types of outer pins with one restricting member.

  Moreover, in the said embodiment, although the area of the 1st control part and the area of the 2nd control part were varied, the area of the 1st control part and the area of the 2nd control part may be set the same. . Even when different, for example, contrary to the above embodiment, the area of the first restricting portion may be set to be larger than the area of the second restricting portion. For example, only the second outer pin is configured by a pin member and a roller member as in the above embodiment, and the load side end of the pin member of the second outer pin is press-fitted into, for example, the sub casing body, In the case where it is originally assembled with high rigidity, the area of the first restricting portion that needs to rotate may be set to be rather large.

  In the above-described embodiment, the load-side regulating member (second regulating member), the supporting member, or another supporting member is appropriately disposed as the “combined member” with respect to the anti-load-side regulating member. However, in the present invention, these combination members are not necessarily provided. Further, the restricting member does not necessarily have to be disposed on the anti-load side of the outer pin. For example, the restricting member may be provided only on the load side of the outer pin. The support member is provided only for one of the first outer pin and the second outer pin as shown in the example of the annular groove, the through hole, and the insertion ring. May be. Therefore, for example, in addition to the restricting member according to the present invention, a configuration in which a “pin pressing member” having a configuration that functions only with respect to one outer pin as in the past may be used as a support member.

  Further, in the above gear device series, a gear device having a center crank type eccentric oscillating speed reduction mechanism having an eccentric body shaft that eccentrically oscillates an external gear at the radial center of the gear device is employed. However, the speed reduction mechanism of the gear device series according to the present invention is not limited to this configuration. For example, a plurality of eccentric body shafts having eccentric bodies for swinging external gears are provided at positions offset from the radial center of the gear device, and the external gears are swung by rotating each eccentric body shaft in synchronization. It can also be applied to an eccentric oscillating gear device called a so-called sorting type. Furthermore, even if it is not an eccentric rocking | fluctuation type gear apparatus, it can apply to the various gear apparatus with which an internal gear is comprised by the outer pin (arc tooth shape).

  In the above gear device series, the example in which the difference in the number of teeth between the external teeth of the external gear and the internal teeth of the internal gear is “1” is shown. The number difference may be two or more, for example. Generally, when the difference in the number of teeth is the same, the smaller the reduction ratio, the smaller the shortest distance from the center of the internal gear. However, when the difference in the number of teeth is different, the reduction ratio and the internal gear The relationship with the shortest distance from the center may not always have this tendency. In the series of gear devices according to the present invention, there is a gear device in which a first outer pin whose distance from the center of the first internal gear to the restricted portion is the first distance is incorporated (regardless of the reduction ratio). A gear device that is defined as a first gear device and that incorporates a second outer pin having a second distance that is smaller than the first distance from the center of the second internal gear to the regulated portion is defined as a second gear device. Is done.

100, 200 ... first and second gear devices 112, 212 ... first and second internal gears 114, 214 ... first and second external gears 140, 240 ... first and second external pins r140, r240A ... 1st, 2nd distance A10 ... (anti-load side) regulating member

Claims (7)

A gear device series comprising: an internal gear whose internal teeth are constituted by external pins; and a regulating member that abuts against a regulated portion provided on the external pin and regulates radial movement of the external pin. And
As the gear device,
A first gear device in which a first outer pin whose distance from the center of the first internal gear to the regulated portion is a first distance is incorporated;
A second gear device incorporating a second outer pin having a second distance that is smaller than the first distance from the center of the second internal gear to the regulated portion,
The restricting member is shared by the first gear device and the second gear device, and is in contact with the first outer pin and a first restricting portion that restricts radial movement by contacting the first outer pin and the second outer pin. And a second restricting portion that restricts radial movement. A series of gear devices. In claim 1,
The gear device includes an external gear that is internally meshed with the internal gear, an internal pin that passes through the external gear at a position offset from the center of the external gear, and an internal roller that is externally fitted to the internal pin. And comprising
A series of gear devices, wherein the regulating member is integrally provided with an inner roller regulating portion that regulates axial movement of the inner roller. In claim 1 or 2,
The gear device series, wherein an area of the first restricting portion is different from an area of the second restricting portion. In claim 3,
The gear device series, wherein an area of the second restricting portion is larger than an area of the first restricting portion. In claim 4,
The first outer pin is composed of a single pin member,
The second outer pin includes a pin member and a roller member fitted on the pin member. A series of gear devices. In any one of Claims 1-5,
In addition to the restriction member, the first gear device includes a support member that restricts the radial movement of the first outer pin,
The second gear device includes, in addition to the regulating member, another supporting member different from the supporting member that regulates the radial movement of the second outer pin,
For the first outer pin of the first gear device, the movement of the first outer pin in the radial direction is restricted by the restricting member and the support member,
Regarding the second outer pin of the second gear device, the radial movement of the second outer pin is restricted by the restricting member and the other support member. A series of gear devices. In claim 6,
The gear device includes at least two external gears that are in mesh with the internal gears in parallel in the axial direction,
The support member in the first gear device is constituted by a support portion provided in a casing of the first gear device,
The other supporting member in the second gear device is constituted by an interval regulating member that regulates an axial interval between the two external gears. A series of gear devices.

Images