TWI745799B - Cycloid reducer with roller holder - Google Patents

Abstract

A cycloid reducer with roller holder, includes a housing, an input shaft, a cycloid wheel, two first roller holders, an Oldham element, a plurality of first rollers, two second roller holders, a ring flange and a plurality of second rollers, the first roller holders are disposed between the cycloid wheel and the Oldham element, the second roller holders are disposed between the ring flange and the Oldham element, such that the first and second rollers are pre-positioned and isolated, so as to avoid the abrasion between the rollers when in use and reduce the noise caused by the collision between the rollers, at the same time, improve assembly efficiency, shorten assembly time, and avoid damage to the rollers, the cycloid wheel, the Oldham element and the ring flange during assembly.

Description

Cycloidal reducer with roller cage

The present invention relates to a cycloid reducer, in particular to a cycloid reducer with a roller retainer.

Refer to Figure 1, which shows a partial exploded view of a general cycloid reducer. It is mainly provided with a cycloid wheel 12 eccentrically depressed by the input shaft 11 in a housing (not shown in the figure). The Oudan element 14 between the wire wheel 12 and the flange 13 is provided with a roller 15 between the coupling portion 141 of the Oudan element 14 and the recess 121 of the cycloid 12, and the Odane element 14 A roller 16 is arranged between the connecting portion 141 of the flange 13 and the concave portion 131 of the flange 13, so that the cycloid reducer can reduce power loss during non-coaxial connection transmission. However, it still has the following defects that need to be improved in actual use and assembly.

First, when the cycloid reducer is in a non-coaxial connection transmission, each of the rollers 15, 16 will rotate in a forward or reverse direction, and there is no interval between the rollers 15, 16 Therefore, the surface of the rollers 15 and 16 will be worn and noise will be generated.

Second, when the cycloid reducer is being assembled, once the rollers 15 are placed on the side wall of the recess 121 of the cycloid 12 and then the Oudan element 14 is placed, or the rollers 16 are placed first The flange 13 is placed on the side wall of the coupling part 141 of the Oudan element 14. These two assembly methods are easy to collide with the rollers 15, 16 and not only cause the rollers 15, 16 to fall and need to be reassembled. Work, resulting in lower assembly efficiency and longer assembly time.

The object of the present invention is to provide a cycloid reducer with a roller retainer, which mainly avoids the wear between the rollers during use and reduces the noise caused by the collision between the rollers.

Another object of the present invention is to provide a cycloid reducer with a roller retainer, which mainly improves assembly efficiency, shortens assembly time, and avoids the problem of rollers, cycloids, Oudan components, and flanges during assembly. Damaged.

To achieve the foregoing objective, the present invention is a cycloid reducer with a roller retainer, comprising: a casing; an input shaft, the shaft is arranged inside the casing and extends along an axis; a cycloid wheel, receiving The input shaft is eccentrically moved and has a first body and two first recesses provided in the first body; two first roller retainers are respectively provided in the first recesses, and each has a first The connecting portion, and two first accommodating portions provided on the first connecting portion, each of the first accommodating portions has at least two first accommodating grooves; an Oudan element, which is linked by the cycloid, and has a ring Body, two first connecting portions extending radially from the ring body and respectively disposed in the first recess and located between the two first accommodating portions, and the first connecting portion abuts against the first connecting portion, And two second coupling parts extending radially from the ring body and spaced apart from each of the first coupling parts; a plurality of first rollers are respectively disposed in the first accommodating grooves and are in rolling contact with the first concave part and Between the first connecting portion; and a flange, connected to the Oudan element and linked by the cycloid, and has a second body, and two second recesses provided in the second body, each of the second The concave portion straddles each of the second connecting portions.

The effect of the present invention is that each of the rollers can be pre-positioned through the roller retainers and the rollers are not in contact with each other, so that when the cycloid reducer performs non-coaxial connection transmission, In order to avoid the wear between the rollers and reduce the noise caused by the collision between the rollers. In addition, the roller retainers can also be used to position the rollers in advance. Therefore, when the Oudan element hits the rollers during the assembly process, the rollers will not tip over. The same method The blue plate hits the roller during the assembly process In this way, the roller will not tip over, so as to improve the assembly efficiency, shorten the assembly time, and avoid damage to the roller, cycloid, Oudan element and flange during assembly.

Preferably, the first connecting portion of each of the first roller cages straddles each of the first coupling portions of the Oudan element, and the first connecting portion of each of the first roller cages is located in the Oudan element. Between each first coupling portion of the element and each first concave portion of the cycloid; between each first receiving portion of each first roller cage and each first coupling portion of the Oudan element With radial clearance.

[Learning]

11: Input shaft

12: Cycloidal wheel

121: Convex

13: Flange

131: Convex

14: Odan components

141: Connection Department

15: roller

16: roller

[this invention]

21: Shell

22: Input shaft

221: Axis

30: Cycloidal wheel

31: The first body

32: The first recess

321: Sidewall

33: Limiting convex part

40: The first roller retainer

41: The first connection part

42: The first accommodating part

421: first housing slot

C1: Center of the first slot

L1: The distance between the centers of each adjacent first slot

S1: first slot width

50: Odan component

51: ring body

52: The first link

521: Sidewall

53: The second link

61: The first roller

D1: The first column diameter

63: second roller

D2: Second column diameter

70: second roller cage

71: The second connecting part

72: The second accommodating part

721: second holding tank

C2: Center of the second slot

L2: The distance between the centers of each adjacent second groove

S2: second slot width

80: Flange

81: The second body

82: second recess

821: Limit convex

83: Limit convex

G: Radial clearance

Figure 1 is a partial exploded view of a general cycloid reducer; Figure 2 is a perspective exploded view of the first embodiment of the present invention, showing the first roller cage, Oudan element, the first roller, and the second roller retainer 3 is a combined cross-sectional view of the first embodiment of the present invention; Figure 4 is a perspective view of the first embodiment of the present invention, showing the first and second roller holding Figure 5 is a partial assembly view of the first embodiment of the present invention, showing the first and second roller cages combined with the first and second rollers; Figure 6 is a partial enlarged view of Figure 3 , Showing the first roller rolling contact between the first recess and the first coupling part; Figure 7 is a partial enlarged view of Figure 3, showing the second roller rolling contact between the second recess and the second coupling part 8 is a perspective exploded view of the second embodiment of the present invention, showing the state of Oudan element, second roller, second roller separation, and flange separation; Figure 9 is the second embodiment of the present invention A three-dimensional portfolio diagram of; and 10 is a partial assembly view of the third embodiment of the present invention; FIG. 11 is a perspective exploded view of the fourth embodiment of the present invention; and FIG. 12 is a perspective exploded view of the fifth embodiment of the present invention.

Please refer to Figures 2 to 7, the first embodiment of the present invention provides a cycloid reducer with a roller retainer, which is mainly composed of a housing 21, an input shaft 22, and a cycloid 30 , Two first roller cages 40, an Oudan element 50, a plurality of first rollers 61, two second roller cages 70, a flange 80, and a plurality of second rollers 63, wherein: the input The shaft 22 is arranged inside the housing 21 and extends along an axis 221.

The cycloidal gear 30 is eccentrically moved by the input shaft 22 and has a first body 31 and two first recesses 32 axially recessed from one end surface of the first body 31. The two first recesses 32 are They are respectively located at both ends in the radial direction of the end face diameter.

The two first roller retainers 40 are respectively arranged in the two first recesses 32 of the cycloid 30, and each has a first connecting portion 41 and two first connecting portions 41 arranged at both ends of the first connecting portion 41. The accommodating portion 42, each of the first accommodating portions 42 has three first accommodating grooves 421; in this embodiment, each of the first accommodating grooves 421 has a first groove center C1, and each adjacent first accommodating groove 421 The distance between the centers of the grooves is L1, and each of the first accommodating grooves 421 has a first groove width S1.

The Oudan element 50 is integrally formed and has a cross shape, and has a ring body 51 and two radially extending from the ring body 51 and respectively disposed in the first concave portion 32 and located between the two first accommodating portions 42 The first connecting portion 52 of each of the first connecting portions 52 abuts against the corresponding first connecting portion 41, and the two radially extending from the ring body 51 are angularly spaced from each of the first connecting portions 52 The second coupling portion 53 is provided.

Each of the first rollers 61 is respectively disposed in each of the first accommodating grooves 421 of the first roller retainers 40, and is in rolling contact between the side wall 321 of the first recess 32 and the side wall 521 of the first connecting portion 52 The contact state is shown in Fig. 6; as shown in Fig. 5, in this embodiment, each of the first rollers 61 has a first cylindrical diameter D1, which is between D1 and the center of each adjacent first groove The distance L1 meets the following relationship: L1>D1; D1 and the first slot width S1 of the first accommodating slot 421 meet the following relationship: S1<D1.

The two second roller retainers 70 respectively straddle the two second connecting portions 53 of the Oudan element 50, and each have a second connecting portion 71, and two second connecting portions 71 arranged at both ends of the second connecting portion 71. Two accommodating portions 72, the two second accommodating portions 72 of each second roller cage 70 are respectively located on both sides of the second connecting portion 53, and each of the second accommodating portions 72 has three second Accommodating groove 721; in this embodiment, each of the second accommodating grooves 721 has a second groove center C2, and the distance between the centers of each adjacent second groove is L2, each of the second accommodating grooves 721 There is a second slot width S2.

The flange 80 is connected to the Oudan element 50 and is linked by the cycloid 30, and has a second body 81 and two second recesses 82 axially recessed from one end surface of the second body 81, each The second concave portion 82 spans the second coupling portion 53 and the second roller cage 70.

Each of the second rollers 63 is respectively disposed in the second accommodating grooves 721 and is in rolling contact between the side wall 821 of the second concave portion 82 and the side wall 531 of the second coupling portion 53. The contact state is shown in FIG. 7; Referring to FIG. 5, in this embodiment, each of the second rollers 63 has a second cylindrical diameter D2, and the distance L2 between D2 and the center of each adjacent second groove conforms to the following relationship: L2>D2 D1 and the second groove width S2 of the second accommodating groove 721 meet the following relationship: S2<D2.

Wherein, the first connecting portion 41 of each of the first roller cages 40 straddles each of the first coupling portions 52 of the Oudan element 50, and the first connecting portion 41 of each of the first roller cages 40 Located between each of the first coupling portions 52 of the Oudan element 50 and each of the first recesses 32 of the cycloid 30; There is a radial gap G between each first accommodating portion 42 of the first roller cage 40 and each first coupling portion 52 of the Oldham element 50.

The above is the description of the structure and configuration of the main components of the first embodiment of the present invention.

Accordingly, in the present invention, when the cycloid 30, the Oudan element 50, and the first rollers 61 are assembled, the first rollers 61 can be installed to the first roller cages 40 first. In a accommodating groove 421, each of the first rollers 61 is positioned in advance, and then the first roller holder 40 is placed in the first recess 32 of the cycloid 30. At this time, due to the The first roller 61 has been pre-positioned by the first roller retainer 40 and will not fall over randomly. Therefore, the Oudan element 50 can be easily installed on the cycloid 30, allowing the Oudan element 50 to be A coupling part 52 is easily and quickly arranged in the first recess 32 of the cycloid 30, and is located between the two first accommodating parts 42 of the first roller cage 40; even if the Odan element 50 is in The first roller 61 is collided during the setting process. Since each of the first rollers 61 has been pre-positioned by the first roller retainer 40, each of the first rollers 61 will not be affected by the collision. Random dumping means that the cycloid reducer provided by the present invention can indeed improve assembly efficiency and shorten assembly time.

Next, in the present invention, when the Odane element 50, the flange 80 and the second rollers 63 are assembled, the second rollers 63 can be installed and arranged to the second coupling portion 53 of the Odane element 50 first. On both sides, the second roller retainer 70 is then straddled on the second coupling portion 53 of the Oudan element 50, and the second accommodating grooves 721 of the second roller retainer 70 are sleeved in The corresponding second roller 63 allows each second roller 63 to be pre-positioned. At this time, since each second roller 63 has been pre-positioned by the second roller holder 70, it will not fall over randomly, Therefore, the flange 80 can be easily arranged on the Oudan component 50, so that the second coupling portion 53 of the Oudan component 50 can be easily and quickly positioned in the second recess 82 of the flange 80, and Located between the two second accommodating portions 72 of the second roller cage 70; even if the flange 80 is in the middle of the installation process After colliding with the second roller 63, since each of the second rollers 63 has been pre-positioned by the second roller retainer 70, each of the second rollers 63 will not fall over due to the collision, Therefore, the cycloid reducer provided by the present invention can indeed improve assembly efficiency, shorten assembly time, and avoid damage to the second roller 63, the Oudan element 50, and the flange 80 during assembly.

Of course, another assembly method of the present invention can also be reverse-assembled with the aforementioned steps. That is, first place each of the second roller cages 70 in the second recess 82 of the flange plate 80, and then insert and position each of the second rollers 63 in each of the second roller cages 70. The two accommodating grooves 721 enable each second roller 63 to be positioned in advance and not easy to fall, and then the second coupling portion 53 of the Oudan component 50 is placed in the second concave portion 82 of the flange 80 and is connected to the second concave portion 82 of the flange 80. The two rollers 63 are in contact; then the first rollers 61 are installed and arranged on both sides of the first coupling portion 52 of the Oudan element 50, and then the first roller retainer 40 is straddled to the Oudan component 50 on the first coupling portion 52, and make each first accommodating groove 421 of the first roller cage 40 cover the corresponding first roller 61, so that each first roller 61 is positioned in advance, Finally, the first concave portion 32 of the cycloid 30 is sleeved on the first coupling portion 52 of the Oudan element 50 and contacted with the first roller 61 to complete the assembly.

It is worth noting that, because the present invention limits the size of the first roller cage 40 and the first roller 61, in particular, each of the first accommodating grooves 421 in the first roller cage 40 The distance L1 between the centers of each adjacent first groove and the first column diameter of the first roller 61 is D1, which conforms to the following relationship: L1>D1. Therefore, it is possible to avoid assembly in each of the first tanks. The first rollers 61 in the groove 421 are in contact with each other. Similarly, the present invention also makes a dimensional limitation between the second roller cage 70 and the second roller 63, that is, each phase in each of the second accommodating grooves 721 in the second roller cage 70 The distance L2 between the center of the second groove and the second column diameter of the second roller 63 is D2, which meets the following relationship: L2>D2. Therefore, it can be avoided to be arranged in each of the second accommodating grooves 721 The inner second rollers 63 are in contact with each other. Accordingly, the present invention through the The structural design of the retainer enables the rollers to be effectively separated after assembly, thereby avoiding the wear between the rollers when the cycloid reducer is used and reducing the noise caused by the collision between the rollers.

In addition, since the present invention limits the size of the first roller cage 40 and the first roller 61, especially the first accommodating groove 421 of the first roller cage 40 The groove width S1 and the first column diameter D1 of the first roller 61 meet the following relationship: S1<D1; and the second groove width S2 of each of the second accommodating grooves 721 in the second roller cage 70 is The second column diameter D2 of the second roller 63 meets the following relationship: S1<D1. Accordingly, the first roller 61 grouped in each of the first accommodating grooves 421 can be brought into rolling contact between the first concave portion 32 and the first coupling portion 52, and the group can be grouped in each of the second accommodating grooves. The second roller 63 in the groove 721 is in rolling contact between the second concave portion 82 and the second coupling portion 53. In this way, the cycloid reducer can reduce power loss during non-coaxial connection transmission, and prevent the first accommodating portion 42 from rubbing against the first recessed portion 32 and the first coupling portion 52, and avoid the second accommodating portion. The placement portion 72 rubs against the second recessed portion 82 and the second coupling portion 53, which in turn causes the problem of the temperature increase of the speed reducer and the abrasion of the components.

Next, the present invention specifically makes each of the first roller cages 40 and each of the second roller cages 70 made of plastic material or/and self-lubricating material. In addition to reducing the production cost, it also improves the The first roller 61 and the second roller 62 are lubricated to increase the service life. In addition, the first accommodating grooves 421 of the first roller cages 40 can also be designed to communicate with each other, and the second accommodating grooves 721 of each of the second roller cages 70 are also designed to communicate with each other. Structure to greatly reduce material costs.

Please refer to Figures 8 and 9, the second embodiment of the present invention provides a cycloid reducer with a roller retainer. The difference from the first embodiment is: The second body 81 of the flange 80 is annular, and each of the second recesses 82 of the flange 80 has two limiting protrusions 821, and each of the two limiting protrusions 821 is radially and radially along the second body 81. It is formed at a distance from each other, and the second limiting protrusion 821 is used to limit the diameter of the second connecting portion 71 of the second roller retainer 70 To any displacement. Accordingly, through the design of the two limiting protrusions 821 of the flange 80, the radial displacement of the second roller retainer 70 can be restricted, and thus the radial displacement of each of the second rollers 63 can be restricted. This design In this way, each of the second connecting portions 53 of the Oudan element 50 does not need to be designed with a retaining hook, so that the structure of the Oudan element 50 is relatively simple, and the equipment cost required for the grinding process is reduced.

Please refer to FIG. 10, the third embodiment of the present invention provides a cycloid reducer with a roller retainer, which differs from the first embodiment in: Each of the first accommodating portions 42 of the first roller cage 40 has two first accommodating grooves 421 for accommodating the first roller 61; each of the second accommodating grooves 421 of the second roller cage 70 The accommodating portion 72 has two second accommodating grooves 721 for accommodating the second roller 63; thereby, another implementation state can be achieved.

Please refer to FIG. 11 and FIG. 12, which are respectively the fourth and fifth embodiments of the present invention to provide a cycloid reducer with a roller retainer, which differs from the first embodiment in: In the first embodiment, referring back to FIG. 2, the first accommodating grooves 421 of each of the first roller cages 40 and the second accommodating grooves 721 of each of the second roller cages 70 The orientation is opposite, which is set to match the assembly method of the first embodiment. However, the first accommodating grooves 421 of the first roller cages 40 and the second roller cages 70 can also be arranged as required. The second accommodating grooves 721 are arranged in the same orientation. As shown in Figure 11, four sets of limiting protrusions 83 are provided on the flange 80 to limit the radial displacement of the first roller retainer 40 and the second roller retainer 70, thereby causing the first roller retainer to move in the radial direction. The first accommodating groove 421 of the column holder 40 and the second accommodating groove 721 of the second roller holder 70 are both set in the direction of the cycloid 30. Or as shown in FIG. 12, four sets of limiting protrusions 33 are provided on the cycloid 30 to limit the radial displacement of the first roller cage 40 and the second roller cage 70, thereby causing the first The first accommodating groove 421 of the roller cage 40 and the second accommodating groove 721 of the second roller cage 70 are both set toward the flange 80.

21: Shell

22: Input shaft

221: Axis

30: Cycloidal wheel

31: The first body

32: The first recess

40: The first roller retainer

41: The first connection part

42: The first accommodating part

50: Odan component

51: ring body

52: The first link

53: The second link

61: The first roller

63: second roller

70: second roller cage

71: The second connecting part

72: The second accommodating part

80: Flange

81: The second body

82: second recess

Claims (10)

A cycloid reducer with a roller retainer, comprising: a casing; an input shaft, the shaft is arranged inside the casing and extends along an axis; a cycloid wheel is eccentrically moved by the input shaft, and It has a first body and two first recesses provided in the first body; two first roller retainers are respectively provided in the first recesses, and each has a first connecting portion, and two are provided in the The first accommodating part of the first connecting part, each of the first accommodating parts has at least two first accommodating grooves; an Oudan element, which is linked by the cycloid, and has a ring body and two diameters from the ring body The first connecting portion extending in the direction of the first concave portion and located between the two first accommodating portions, and the first connecting portion abuts against the first connecting portion, and two are radially formed by the ring body A second coupling part extending and spaced apart from each of the first coupling parts; a plurality of first rollers respectively disposed in the first accommodating grooves and rolling contact between the first concave part and the first coupling part; and A flange, connected to the Oudan element and linked by the cycloid, has a second body, and two second recesses provided on the second body, each of the second recesses straddling each of the second The connecting portion; wherein the first connecting portion of each of the first roller cages straddles each of the first connecting portions of the Oudan element, and the first connecting portion of each of the first roller cages is located in the European Between each of the first coupling portion of the Dan element and each of the first concave portion of the cycloid; the first accommodating portion of each of the first roller cages and the first coupling portion of the Oudan element There is a radial gap between. The cycloid reducer with a roller cage as described in claim 1, wherein each of the first accommodating grooves has a first groove center C1, and the distance between each adjacent first groove center is L1, each of the first rollers has a first cylindrical diameter D1, which conforms to the following relationship: L1>D1. The cycloid reducer with roller retainer as described in claim 1, wherein each of the first accommodating grooves has a first groove width of S1, and each of the first rollers has a first cylindrical diameter of D1 , In line with the following relationship: S1<D1. The cycloid reducer with roller cages as described in claim 1, which further includes two second roller cages and a plurality of second rollers; the two second roller cages are straddling the The second connecting portion each has a second connecting portion and two second receiving portions provided on the second connecting portion, and the two second receiving portions of each second roller retainer are respectively located in the first On both sides of the two connecting parts and each of the second accommodating parts has at least two second accommodating grooves; a plurality of the second rollers are respectively arranged in the second accommodating grooves and are in rolling contact with the second concave part and Between the second connecting part. For the cycloid reducer with roller retainer as described in claim 4, each of the second accommodating grooves has a second groove center C2, and the distance between each adjacent second groove center is L2 , Each of the second rollers has a second column diameter of D2, which conforms to the following relationship: L2>D2. The cycloid reducer with a roller cage according to claim 4, wherein each second concave portion of the flange has two limiting protrusions, and the two limiting protrusions are used to restrict the second roller cage的二连接部。 The second connection. The cycloid reducer with a roller retainer according to claim 6, wherein the second body of the flange is ring-shaped, and each of the two limiting protrusions is formed along the radial direction of the second body and separated by a distance . For the cycloid reducer with roller retainer as described in claim 4, each of the second accommodating grooves has a first groove width of S2, and each of the second rollers has a second cylindrical diameter of D2, Meet the following relationship: S2<D2. The cycloid reducer with a roller cage as described in claim 4, wherein the number of first accommodating grooves in each of the first accommodating parts of the first roller cage is three; the second roller There are three second accommodating grooves of each second accommodating part of the holder. The cycloid reducer with a roller cage as described in claim 4, wherein the first accommodating grooves of the first roller cages communicate with each other, and the second accommodating grooves of the second roller cages communicate with each other. The slots are connected.

Images