TW201814189A - Oldham device of cycloidal speed reducer characterized by smaller grinding step difference, easy and reliable assembly, and lower costs - Google Patents

Abstract

An Oldham device of a cycloidal speed reducer includes an Oldham element and a plurality of roller retainers. The Oldham element includes a ring body and a plurality of protrusions. The ring body has an inner ring surface and an outer ring surface opposite to the inner ring surface. The protrusions are circumferentially disposed on the outer ring surface of the ring body at intervals, and each protrusion has a setting end surface opposite to the outer ring surface. The roller retainers are detachably disposed on the protrusions, respectively. Each roller retainer includes a retainer corresponding to the setting end surface of the corresponding protrusion, and two clamping members spaced apart from each other and connected to the retainer and cooperatively clamped on the corresponding protrusion. Each retainer has two holding hook portions that respectively protrude outwardly toward two opposite sides of the corresponding protrusion and respectively correspond to the outer ring surface.

Description

Ondan device of cycloid reducer

The invention relates to a cycloid reducer, in particular to an ondan component of a cycloid reducer.

Referring to FIG. 1, an existing Ondan element 81 for a cycloid reducer is sleeved on an input shaft 82 and is connected between a cycloid wheel 83 and a flange 84, and the Ondan element 81 and the pendulum A plurality of rollers 85 are provided between the reel 83 and the flange 84, but the above-mentioned components are all located in a casing 86. Because the structure design of the Ondan element 81, the cycloid wheel 83 and the flange 84 cannot resist the radial movement of the rollers 85, it must pass through the casing 86 at the position corresponding to the Ondan element 81 A stop ring 87 is provided to resist the radial movement of the rollers 85. In this way, not only the housing 86 must be increased in size to accommodate the stop ring 87, but also the ondan element 81, The alignment assembly of the cycloid wheel 83 and the flange 84 with the stop ring 87 is difficult.

Referring to FIG. 2, another existing Ondan element 91 for a cycloid reducer is sleeved on an input shaft 92 and connected between a cycloid wheel 93 and a flange 94, and the Ondan element 91, the A plurality of rollers 95 are provided between the cycloid wheel 93 and the flange 94. However, the above components are all located in a casing 96. The ondan element 91 includes a ring body 911, four convex bodies 912 formed on the outer ring surface of the ring body 911 at intervals, and four pairs of limiting hooks formed on the convex bodies 912 opposite to one end of the ring body. The part 913, the limit hook parts 913 of the Ondan element 91 can resist the roller 95 from moving away in the radial direction. In this way, the problem caused by adding the limit ring 87 to the cycloid reducer can be solved. Problem, but when the Ondan element 91 is in the grinding process, the ring body 911 cooperates with each limit hook portion 913 to easily interfere with the grinding cam operation, resulting in each convex body 912 and the ring body 911 and the corresponding limit hook. A grinding step difference is formed on the surface of the connecting groove of the part 913, and the grinding step difference formed by the Ondan element 91 will cause the abrasion of the rollers 95. Therefore, the above Ondan element 91 must be priced at eight or nine million yuan. A special machine is used to perform the grinding process to overcome the above-mentioned problem of grinding steps.

It is therefore an object of the present invention to provide an ondan device of a cycloidal reducer that overcomes at least the disadvantages described in the prior art.

Therefore, the ondan device of the cycloid reducer according to the present invention includes an ondan component and a plurality of roller holders.

The ondan element includes a ring body and a plurality of convex bodies. The ring body has an inner ring surface and an outer ring surface opposite to the inner ring surface. The convex bodies are arranged on the outer ring surface of the ring body at intervals, and each convex body has a set end surface opposite to the outer ring surface.

The roller holders are detachably provided on the convex bodies, respectively. Each roller retainer includes a retaining member corresponding to a set end surface of the corresponding convex body, and two clamping members which are spaced apart from each other, are connected to the retaining member, and are mated with the corresponding convex body. Each holding member has two holding hook portions that protrude outwardly toward two opposite sides of the corresponding convex body and respectively correspond to the outer ring surface.

The effect of the present invention lies in that the roller retainers are designed to be detachably clipped to the components of the Ondan component, which can not only solve the aforementioned limitation of adding the existing cycloid reducer to resist the detachment of the roller The problem caused by the position ring, and when the Ondan element is independently performing the grinding process of the convex surfaces, the structure of the Ondan element is simple and the grinding cam is not affected by the holding hooks of the roller holders. Interference, so the general grinding machine can carry out the grinding process of the Ondan element, and the special grinding machine does not need to be used to carry out the grinding process. In addition, the structure design of each roller holder through its clamps , To achieve the effect of simple, convenient and stable assembly on the Ondan component.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are represented by the same numbers.

Referring to FIG. 3, an embodiment of the Ondan device of the cycloid reducer according to the present invention. The Ondan device 11 is sleeved on an input shaft 12 and is connected between a cycloid wheel 13 and a flange 14. A plurality of rollers 15 are provided between the ondan device 11, the cycloid wheel 12, and the flange 13. The cycloid wheel 13, the flange 14, and the ondan device 11 are all provided in a casing 16. The ondan device 11 includes an ondan component 2 and a four-roller holder 3.

Referring to FIG. 4, FIG. 5 and FIG. 6, the ondan element 2 is integrally formed and includes a ring body 21 and a four convex body 22. The ring body 21 surrounds an axis L in a circular shape, and the ring body 21 has an inner ring surface 211, an outer ring surface 212 opposite to the inner ring surface 211, and a ring connected to the inner ring surface 211 and the outer ring surface. A front side surface 213 between 212 and a rear side surface 214 connected between the inner ring surface 211 and the outer ring surface 212 and opposite to the front side surface 213. The convex bodies surround the outer ring surface 212 provided on the ring body 21 at an angular interval of 90 degrees. The convex bodies 22 cooperate to extend outward from the outer ring surface 212 in a cross shape. Each convex body 22 has a Opposite to the installation end surface 221 of the outer annular surface 212, a front fastening surface 222 connected between the installation end surface 221 and the front side surface 213, and a rear fastening surface connected between the installation end surface 221 and the rear side 214 223, and two fastening grooves 224 formed in the front fastening surface 222 and the rear fastening surface 223, respectively. Each of the fastening grooves 224 has a clamping groove portion 225 connected to the provided end surface 221 and a limiting groove portion 226 adjacent to the ring body 21.

The roller holders 3 are respectively detachably provided on the convex bodies 22. Each roller retainer 3 is integrally formed, and includes a retaining member 31 corresponding to the installation end surface 221 of the corresponding convex body 22, two phases spaced apart and connected to the retaining member 31, and fixedly arranged on the corresponding convex body 22 in cooperation. The clips 32 and two limiting pieces 33 are respectively disposed on the clips 32 and project relatively. Each of the holding members 31 has two holding hook portions 311 protruding outwardly toward two opposite sides of the corresponding convex body 22 and corresponding to the outer ring surface 212, respectively, and a depression formed on the surface of the opposite clamping members 32.模 槽 312. The clamping members 32 of each roller holder 3 are respectively fitted into the clamping groove portions 225 of the engaging grooves 224 of the corresponding protrusions 22. Each clamping member 32 has a connecting end 321 connected to the holding member 31. And an open end 322 opposite to the connecting end portion 321. The limiting pieces 33 of each roller holder 3 are respectively located at the open ends 322 of the corresponding clamping members 32 and are respectively fitted into the limiting groove portions 226 of the engaging grooves 224 of the corresponding convex body 22. The position member 33 has a circular arc guide surface 331, and the circular arc guide surfaces 331 of the limit members 33 of each roller holder 3 are opposite to each other.

The holding hook portions 311 of each holding member 31 are used to resist the detachment and movement of the rollers 15 in the radial direction. The demolding groove 312 of each holding member 31 can deform when the holding hook portion 311 is buckled. In addition, in addition to the above, a pressure may be applied to the mold release groove 312, so that the holding hook portion 311 is opened and then hooked.

In this embodiment, in order to ensure that each roller holder 3 can be stably clamped to the Ondan element 2 in the structural design, and can resist the rollers 15 in a radial direction when the cycloid reducer 1 is in operation The applied force of the Ondan device 11 satisfies the following conditions: D3 <D4 <D2 <D1, where D1 is the distance between the connecting ends 321 of the clamping members 32 of each roller holder 3, and D2 is each roller The distance between the open ends 322 of the clips 32 of the holder 3, D3 is the distance between the stoppers 33 of each roller holder 3, and D4 is the thickness of each convex body 22 in a clamping direction, that is, The distance between the front engaging surface 222 and the rear engaging surface 223 of each convex body 22.

However, the clamping members 32 of each roller holder 3 extend obliquely to each other and have an included angle θ under the above conditions (D2 <D1), and the limiters 33 of each roller holder 3 The arc guide surface 331 is used to slide along the surface of the corresponding convex body 22 along the above conditions (D3 <D4), thereby supporting and clamping the corresponding fasteners 32 to the corresponding convex body 22, so as to To achieve the effect of convenient installation. In this embodiment, the clamping members 32 of each roller holder 3 extend symmetrically and inclined, and the included angle θ is greater than 8 degrees, but is not limited thereto, and may vary depending on the overall structural design requirements.

It is worth mentioning that the arc guide surface 331 of each stopper 33 can also be provided as an inclined guide surface 332 that extends obliquely outward from the corresponding open end 322 of the clamping member 32 toward the corresponding holder 31 ( (See Fig. 7 and Fig. 8), which can also achieve the same auxiliary stretching effect. A circular arc structure 313 (see FIGS. 9 and 10) can also be provided at the joints between the holders 31 of the roller holders 3 and the clips 32 to help disperse the clips 32 and the holders 31. The stress generated at the connection to avoid excessive concentration of stress on the above-mentioned component connection. In addition, the clamping members 32 of each roller holder 3 can also adjust the connection position with the holder 31 (see FIGS. 11 and 12), thereby being able to clamp to the corresponding convex body 22 by side clamping. The other two sides are opposite.

Preferably, each of the clamping members 32 also has a convex pattern 323 (see FIGS. 13 and 14) formed on the inner plate surface. The clamping members 32 of each roller holder 3 can be increased and increased by its convex pattern 323. The frictional force between the corresponding convex bodies 22 can be more stably clamped to the convex bodies 22.

It is worth mentioning that each roller retainer 3 can also be modified according to different needs. As shown in Figure 15 and Figure 16, the roller retainer 3, the outline shape of each clamping member 32 is a connecting end 321 is the long side and the open end 322 is the isosceles trapezoid of the short side, or the roller holder 3 as shown in FIG. 17 and FIG. 18. The contour of the open end 322 of each clip 32 is arc-shaped. .

In summary, the ondan device 11 of the cycloid reducer of the present invention is a component combination design which is detachably clamped to the ondan component 2 through the roller holders 3, which can not only solve the aforementioned existing pendulum The linear reducer is provided with a stop ring for resisting the detachment of the roller, and when the Ondans element 2 performs the grinding process on the surfaces of the convex bodies 22 independently, the structure of the Ondans element 2 is simple and The grinding cam will not be interfered by the holding hooks 311 of these roller holders 3, so the general grinding machine can perform the grinding process of the Ondan element 2 without using a special machine as expensive as described above. In the grinding process, in addition, each roller holder 3 achieves the effect of simple, convenient and stable assembly on the ondan component 2 through the structural design of the clamping members 32 and the stoppers 33, so it can indeed be achieved. Object of the invention.

However, the above are only examples of the present invention. When the scope of implementation of the present invention cannot be limited in this way, any simple equivalent changes and modifications made in accordance with the scope of the patent application and the content of the patent specification of the present invention are still Within the scope of the invention patent.

1‧‧‧ cycloid reducer

11‧‧‧ Ondan device

12‧‧‧ input shaft

13‧‧‧Cycloid wheel

14‧‧‧ flange

15‧‧‧ roller

16‧‧‧chassis

2‧‧‧ Ondan components

21‧‧‧ ring body

211‧‧‧ inner torus

212‧‧‧outer torus

213‧‧‧Front side

214‧‧‧ rear side

22‧‧‧ convex

221‧‧‧Set the end face

222‧‧‧Front fastening surface

223‧‧‧back fastening surface

224‧‧‧Snap groove

225‧‧‧Clamping groove

226‧‧‧ limit slot

3‧‧‧ roller cage

31‧‧‧Retainer

311‧‧‧Hook

312‧‧‧ demolding tank

313‧‧‧arc structure

32‧‧‧ Clip Firmware

321‧‧‧Connector

322‧‧‧ open end

323‧‧‧Convex

33‧‧‧ limit pieces

331‧‧‧arc guide surface

332‧‧‧ oblique guide surface

L‧‧‧ axis

D1‧‧‧Pitch

D2‧‧‧Pitch

D3‧‧‧Pitch

D4‧‧‧Pitch

θ‧‧‧ angle

Other features and effects of the present invention will be clearly presented in the embodiment with reference to the drawings, in which: FIG. 1 is a cross-sectional view of a conventional cycloid reducer, illustrating the combination of an ondan element and other elements Figure 2 is a cross-sectional view of another existing cycloidal reducer, illustrating a combination of an Ondan element and other components; Figure 3 is a cross-sectional view illustrating an implementation of the Ondan device of the cycloidal reducer of the present invention; Combination of the example with other components of the cycloid reducer; Figure 4 is a perspective view of the embodiment; Figure 5 is a perspective exploded view illustrating the combination relationship between an ondan component and a four-roller retainer of the embodiment Figure 6 is an incomplete cross-sectional view illustrating the structure of one of the roller cages of the embodiment and a convex body of the Ondan element; Figure 7 is a perspective view illustrating the first of the embodiment A roller retainer with a structural change; FIG. 8 is a side view illustrating a roller retainer with a first structural change of the embodiment; FIG. 9 is a perspective view illustrating a second kind with the embodiment; Structural change Column holder; Fig. 10 is a side view illustrating a roller holder of a second structural variation of the embodiment; Fig. 11 is a perspective view of a roller of a third structural variation of the embodiment Holder; FIG. 12 is a side view illustrating a roller retainer of a third structural variation of the embodiment; FIG. 13 is a perspective view of a roller retainer of a fourth structural variation of the embodiment FIG. 14 is a side view illustrating a roller retainer in a fourth structural variation of the embodiment; FIG. 15 is a perspective view illustrating a roller retainer in a fifth structural variation of the embodiment FIG. 16 is a front view illustrating a roller retainer in a fifth structural variation of the embodiment; FIG. 17 is a perspective view illustrating a roller retainer in a sixth structural variation of the embodiment; And FIG. 18 is a front view illustrating a roller retainer according to a sixth modification of the embodiment.

Claims (10)

An ondan device of a cycloidal speed reducer, comprising: an ondan element including a ring body and a plurality of convex bodies, the ring body having an inner ring surface and an outer ring surface opposite to the inner ring surface, etc. The convex bodies are spaced around the outer annular surface of the ring body, and each convex body has an installation end surface opposite to the outer annular surface; and a plurality of roller holders are respectively detachably provided on the convex bodies, each The roller holder includes a holding member corresponding to a set end surface of the corresponding convex body, and two clamping members which are spaced apart from each other, are connected to the holding member, and are mated with the corresponding convex body, and each holding member has two respectively facing Two opposite sides of the corresponding convex body protrude outward and respectively correspond to the retaining hook portions of the outer ring surface. The ondan device of the cycloid reducer according to claim 1, wherein each clamping member has a connection end connected to the holder and an open end opposite to the connection end, and the roller holder The distance between the connecting ends of the clamping members is D1, and the distance between the open ends of the clamping members of each roller holder is D2, and the following conditional formula is satisfied: D2 <D1. The ondan device of the cycloid reducer according to claim 2, wherein the clamping members of each roller holder extend obliquely to each other and include an included angle. The ondan device of the cycloid reducer according to claim 2, wherein each roller retainer further includes two limit pieces which are respectively disposed at the open ends of the clamping members and are relatively protruding, and each roller retainer The distance between the stoppers of the device is D3, the thickness of each convex body in a clamping direction is D4, and the following conditional formula is satisfied: D3 <D4 <D2. The ondan device of the cycloidal speed reducer according to claim 4, wherein each convex body has two fastening grooves respectively provided for corresponding clamping members of the roller holder and the limiter, and each fastening groove There is a clamping groove portion corresponding to the corresponding clamping fixture, and a limitation groove portion of the corresponding limiting piece corresponding to the limitation accommodation. The ondan device of the cycloidal speed reducer according to claim 4, wherein each limit member has an arc guide surface, and the arc guide surfaces of the limit members of each roller holder are opposed to each other. The ondan device of the cycloidal speed reducer according to claim 4, wherein each of the stoppers has an inclined guide surface that extends obliquely outward from the open end of the corresponding clamping member toward the corresponding holder. The ondan device of the cycloidal speed reducer according to claim 1, wherein each of the clamping members further has a convex pattern formed on the inner plate surface. The ondan device of the cycloidal speed reducer according to claim 1, wherein the connection between the holder of each roller holder and the clamping fixture has a circular arc structure. The ondan device of the cycloid reducer according to claim 1, wherein the ondan component is integrally formed, and each roller holder is integrally formed.