TW202316047A - Spacer and cycloid reducer with the spacer capable of adjusting the distance between two adjacent rollers by turning over the spacer for saving manufacturing costs and reducing assembly difficulties - Google Patents

Abstract

The spacer of the present invention includes a first surface and a second surface facing away from the first surface. The first surface and the second surface respectively have two opposite first roller accommodating grooves and two opposite second roller accommodating grooves. The first roller accommodating groove and the second roller accommodating groove on the first surface correspond to the second roller accommodating groove and the first roller accommodating groove on the second surface. The spacer of the present invention further defines a datum plane, which is perpendicular to a horizontal direction and passes through a center point of the maximum thickness of the spacer. The horizontal distance from the datum plane to the center of each first roller accommodating groove is different from the horizontal distance from the datum plane to the center of each second roller accommodating groove. By turning over the spacer of the present invention, the distance between two adjacent rollers can be adjusted. In addition, the present invention further provides a cycloid reducer with the aforementioned spacer.

Description

Spacer and cycloid reducer with the spacer

The present invention relates to a spacer, in particular to a spacer and a cycloid reducer with the spacer.

Roller screws, roller linear slides or roller bearings commonly used in precision machinery mainly use multiple rollers as the transmission interface. A spacer is usually installed between two adjacent rollers to avoid the two adjacent rollers. The two rollers are damaged by direct collision, and at the same time achieve the effect of reducing noise. For example, patent documents such as US 4,479,683 and US 9,995,340 all disclose related structural designs.

However, in order to be able to adjust the distance between two adjacent rollers, the traditional method is usually to prepare at least two spacers of different thicknesses, and to achieve the effect of adjusting the distance by replacing the spacers of different thicknesses, but it will cost a lot of money in the replacement process. It takes more time, so it is troublesome and inconvenient to assemble. In addition, a variety of spacers with different thicknesses need to make a variety of different molds, so the manufacturing cost is relatively high.

The main purpose of the present invention is to provide a spacer, which can adjust the distance between two adjacent rollers by using the distance difference between the center of different roller accommodation grooves and a reference plane, which can reduce the assembly difficulty and save the manufacturing cost.

In order to achieve the above-mentioned main purpose, the spacer of the present invention includes a first surface and a second surface facing away from the first surface, and the first surface and the second surface respectively have two first roller accommodating grooves and two second roller accommodation grooves, the first roller accommodation grooves of the first surface and the second roller accommodation grooves of the first surface are staggered relative to the center of the first surface , the first roller accommodating grooves on the second surface and the second roller accommodating grooves on the second surface are staggered relative to the center of the second surface; in addition, the first roller accommodating grooves on the first surface The first roller accommodating grooves correspond to the second roller accommodating grooves of the second surface, and the second roller accommodating grooves of the first surface correspond to the first rollers of the second surface The accommodating groove, wherein, the spacer of the present invention further defines a reference plane, the reference plane is perpendicular to a horizontal direction and passes through a center point of the maximum thickness of the spacer, and the reference plane reaches each of the first roller accommodating grooves The horizontal distance of the center of the center is defined as L1, and the horizontal distance from the reference plane to the center of each of the second roller accommodating grooves is defined as L2, both of which satisfy the following relationship: L1>L2, so that the spacer of the present invention is flipping After 90 degrees, the distance between two adjacent rollers can be changed.

It can be seen from the above that by turning over the spacer of the present invention, the spacer of the present invention can use the distance difference between the first roller accommodation groove, the second roller accommodation groove and the reference plane to adjust the two adjacent rollers The spacing can not only effectively reduce the assembly man-hours, but also do not need to make a variety of different molds, so the manufacturing cost can be reduced.

Preferably, a first protrusion is adjacent between the first roller accommodating groove on the first surface and the second roller accommodating groove, and the first roller accommodating on one of the second surface A second protrusion is adjacent to the groove and a second roller accommodating groove, and the second protrusions correspond to the first protrusions one-to-one; in addition, the reference surface and a first protrusion The maximum distance between them is equal to the maximum distance between the reference surface and a second protrusion.

Preferably, there is a distance difference between L1 and L2, which varies according to the size of the input flange or output flange used with the spacer of the present invention, and in this embodiment is between 0.1mm Between -0.4mm.

Preferably, each of the first protrusions and each of the second protrusions has a rounded corner design. When the assembly position deviates, the spacer of the present invention can achieve the effect of automatic correction through the rounded corners.

Preferably, the sectional shapes of the first roller accommodating grooves and the second roller accommodating grooves are all arc-shaped, and the first roller accommodating grooves and the second roller accommodating grooves The column housings have the same curvature. Thereby, when used with the rollers, the first roller accommodation grooves and the second roller accommodation grooves will form surface contact with the rollers to provide support for the rollers Effect.

Preferably, the sectional shapes of the first roller accommodating grooves and the second roller accommodating grooves are rounded triangles, and the first roller accommodating grooves and the second roller accommodating grooves The roller receiving grooves have the same size. Thereby, when used with the rollers, the first roller accommodation grooves and the second roller accommodation grooves will form line contact with the rollers to reduce the friction between them, And can effectively prevent the occurrence of stress concentration.

Preferably, the outer periphery of the spacer further has four identification parts (such as grooves), and the identification parts correspond to the first roller accommodating grooves or the second rollers in a one-to-one manner. The accommodating slot is convenient for users to identify to improve assembly efficiency.

Preferably, the first surface and the second surface are penetrated by an oil storage tank for storing lubricating oil.

On the other hand, the present invention further provides a cycloid reducer, which includes a housing, a rotating shaft, an input flange, an output flange, a reduction gear, a plurality of rollers and a plurality of spacers . The rotating shaft is rotatably installed in the casing and has an input end and an output end; the input flange is rotatably arranged at one end of the casing and is rotatably assembled at the input end of the rotating shaft; The output flange is rotatably arranged at the other end of the casing and rotatably assembled at the output end of the shaft, and is connected with the input flange; the reduction gear has at least one cycloidal wheel and at least one Odan Coupling, the cycloidal wheel is eccentrically arranged on the rotating shaft, and the Odan coupling is arranged between the cycloidal wheel and the input flange or between the cycloidal wheel and the output flange; The column is arranged between the casing and the input flange and between the casing and the output flange; each of the spacers is arranged between two adjacent rollers, and each of the spacers can optionally be connected with the second The first roller receiving grooves or the second roller receiving grooves of a surface support a roller, and each of the spacers can optionally receive the first rollers of the second surface The groove or the second roller receiving grooves support another of the rollers. Thereby, when the cycloid wheel is driven by the rotating shaft, it will produce a cycloid rotation relative to the housing, and then the input flange and the output flange will be linked through the Odan coupling, so that the input flange and the output flange will be connected to each other. The output flange rotates relative to the casing through the rollers, thereby achieving the effect of decelerating the rotation.

The detailed structure, features, assembly or usage of the spacer and the cycloidal reducer provided with the spacer provided by the present invention will be described in the detailed description of the following embodiments. However, those who have ordinary knowledge in the field of the present invention should understand that the detailed description and the specific embodiments enumerated for implementing the present invention are only for illustrating the present invention, and are not intended to limit the scope of patent application of the present invention.

The applicant hereby explains that in the entire specification, including the embodiments described below and the claims of the scope of the patent application, the nouns related to direction are based on the directions in the drawings. Secondly, in the embodiments and drawings to be described below, the same component numbers represent the same or similar components or their structural features.

Please refer to FIG. 1 and FIG. 2 , the spacer 10 in the first embodiment of the present invention includes a first surface 12 , a second surface 14 facing away from the first surface 12 and a penetrating first surface 12 and second surface 14 The oil storage tank 16. The first surface 12 and the second surface 14 respectively have two first roller accommodation grooves 18 opposite to each other and two second roller accommodation grooves 20 opposite to each other. In this embodiment, the first roller accommodation grooves The cross-sectional shape of the column accommodation groove 18 and the cross-sectional shape of the second roller accommodation grooves 20 are arc-shaped, and the first roller accommodation grooves 18 and the second roller accommodation grooves 20 have same curvature.

Please continue to refer to FIG. 1 and FIG. 2 , the two first roller accommodating grooves 18 on the first surface 12 and the two second roller accommodating grooves 20 on the first surface 12 are staggered relative to the center of the first surface 12 , the two first roller accommodating grooves 18 of the second surface 14 and the two second roller accommodating grooves 20 of the second surface 14 are staggered relative to the center of the second surface 14, wherein the first surface 12 The two first roller accommodation grooves 18 correspond to the two second roller accommodation grooves 20 of the second surface 14, and the two second roller accommodation grooves 20 of the first surface 12 correspond to the second surface 14 Two first roller accommodating grooves 18, that is, the arrangement of the two first roller accommodating grooves 18 and the two second roller accommodating grooves 20 on the first surface 12 and the arrangement on the second surface 14 The alignments are 90 degrees apart.

In order to facilitate the user to identify the positions of the first roller accommodating groove 18 and the second roller accommodating groove 20, four identification parts 22 may be further provided on the outer periphery of the spacer 10 (here, grooves are used as an example, but Not limited to grooves), as shown in Figure 1 and Figure 2, the identification parts 22 correspond to the first roller accommodation grooves 18 or the second roller accommodation grooves 20 in a one-to-one manner , in this embodiment, the identification portions 22 correspond to the first roller accommodating groove 18 in a one-to-one manner.

As shown in Figures 3 to 5, the spacer 10 defines a reference plane P, the reference plane P is perpendicular to a horizontal direction X and passes through a maximum thickness center point C of the spacer 10, with respect to the distance between the reference plane P and the first surface 12 In terms of relationship, the horizontal distance between the reference plane P and the center C1 of the first roller accommodation groove 18 is defined as L1, and the horizontal distance between the reference plane P and the center C2 of the second roller accommodation groove 20 is defined as L2. Satisfy the relational expression of L1>L2, whereby, when the spacer 10 turns over 90 degrees from the first use state S1 shown in Figure 3 to the second use state S2 shown in Figure 4, the reference plane P and the roller The distance between the centers of 90 will change, and the relationship between the reference plane P and the second surface 14 is also the same, and will not be repeated here. Furthermore, the first surface 12 has a first protrusion 24 at the junction of the first roller accommodation groove 18 and the second roller accommodation groove 20, that is, as shown in FIG. 1, the first surface 12 has four first protrusions 24, and the second surface 14 has a second protrusion 26 at the junction of the first roller accommodation groove 18 and the second roller accommodation groove 20, that is, as shown in FIG. 2 As shown, the second surface 14 has four second protrusions 26 , and the second protrusions 26 correspond to the first protrusions 24 one-to-one.

Please refer to Fig. 6 to Fig. 10, the spacer 10 of the present invention is mainly applied to the cycloid reducer 30, and the cycloid reducer 30 includes a housing 40, a rotating shaft 50, an input flange 60, an An output flange 70 , a reduction gear 80 , a plurality of rollers 90 and a plurality of spacers 10 .

The rotating shaft 50 is rotatably passed through the casing 40 and has an input end 52 and an output end 54 .

The input flange 60 is assembled at one end of the casing 40 . The center of the input flange 60 has a first shaft hole 62, the input flange 60 utilizes the first shaft hole 62 to be sleeved on the input end 52 of the rotating shaft 50, and a first bearing 66 is arranged between the input end 52 of the rotating shaft 50 , so that the rotating shaft 50 and the input flange 60 rotate relatively through the first bearing 66 . In addition, the input flange 60 has four first connecting posts 64 around the first shaft hole 62 .

The output flange 70 is assembled at the other end of the casing 40 . The center of the output flange 70 has a second shaft hole 72, the output flange 70 is sleeved on the output end 54 of the rotating shaft 50 by the second shaft hole 72, and a second bearing 76 is arranged between the output end 54 of the rotating shaft 50 , so that the rotating shaft 50 and the output flange 70 rotate relatively through the second bearing 76 . In addition, the inner peripheral surface of the output flange 70 has four second connecting columns 74 around the second shaft hole 72, and the four first connecting columns 64 of the input flange 60 are connected to the output flange by four bolts 78. Four second connecting columns 74 of 70 make the two assemble together.

The reduction gear 80 has two cycloidal wheels 82 , two Oldham couplings 84 and multiple needle rollers 86 . The two cycloidal wheels 82 are arranged side by side and are both sleeved in the center of the rotating shaft 50 in an eccentric manner. The two cycloidal wheels 82 are jointly passed through by the four second connecting columns 74 of the output flange 70; The shaft device 84 is arranged between the input flange 60 and the cycloidal wheels 82, and another Odan coupling 84 is arranged between the output flange 70 and the cycloidal wheels 82; the needle rollers 86 are arranged on Between the inner peripheral surface of the housing 40 and the outer peripheral surface of the cycloidal wheels 82, the cycloidal wheels 82 can operate stably. In this way, when the cycloidal wheels 82 are driven by the rotating shaft 50, they will produce a cycloidal rotation relative to the housing 40, and then the input flange 60 and the output flange 70 will be linked through the Odan couplings 84, so that the input The flange 60 and the output flange 70 rotate relative to the housing 40 to achieve the effect of decelerating the rotation.

These rollers 90 are arranged between the shell 40 and the input flange 60 and between the shell 40 and the output flange 70, and are used as the gap between the shell 40 and the input flange 60 and between the shell 40 and the output flange. The transmission interface between 70. What needs to be added here is that the arrangement of the rollers 90 can be adjusted according to actual needs, for example, in the normal use state, they are arranged in a cross manner as shown in Figure 11a. If a higher radial load is required, some The rollers 90 are adjusted to be arranged as shown in Fig. 11b. If a higher axial load is required, some rollers 90 can also be adjusted to be arranged as shown in Fig. 11c.

Each spacer 10 is disposed between two adjacent rollers 90 . Since each spacer 10 can be turned over under two different use states, and the arrangement of the rollers 90 can be selectively adjusted, each spacer 10 can use the first rollers of the first surface 12 on the one hand. The column accommodating groove 18 or the second roller accommodating grooves 20 support one of the rollers 90, on the other hand, the second roller accommodating grooves 20 or the first roller accommodating grooves of the second surface 14 The slot 18 supports another roller 90 .

It can be seen from the above that after the installation of the spacer 10 is completed, the rollers 90 on the same side will produce a distance difference L3 due to the spacer 10 in two different use states, and the rollers 90 on the other side will also produce a distance difference L3. The distance difference L3, so the distance between two adjacent rollers 90 can be adjusted by manually turning the spacer 10 by 90 degrees. As shown in Figure 12, when the spacer 10 is in the first use state S1, the distance between the leftmost end of the left roller 90 and the rightmost end of the right roller 90 is G1, when the spacer 10 flips to During the second use state S2, the distance between the leftmost end of the left roller 90 and the rightmost end of the right roller 90 is G2, and the gap between G1 and G2 is twice the distance difference (2× L3). In this way, the present invention does not need to replace spacers of different thicknesses to adjust as in the prior art. It only needs to turn over 90 degrees to different use states to achieve the effect of adjusting the spacing, which not only can effectively reduce the assembly man-hours, but also does not Many different molds need to be made, so manufacturing costs can be reduced. In addition, each first protruding portion 24 and each second protruding portion 26 can have rounded corners 29 (as shown in FIG. 3 and FIG. 4 ), when the assembly position of the spacer 10 deviates, the The rounded corner 29 achieves the effect of automatic correction, and there is no need to adjust it manually.

On the other hand, the distance difference L3 generated by the spacer 10 under different usage conditions will be different due to the size of the input flange 60 or the output flange 70 used with it. Please refer to Figure 13 and Figure 14 (the output flange 70 is taken as an example in Figure 13, and the situation of the input flange 60 is also the same, which will not be drawn separately here). Assuming that the diameter of the output flange 70 is ψ, two adjacent The distance between the rollers 90 is G. If the diameter ψ is smaller, the arrangement of the rollers 90 needs to make the distance G larger due to the curvature. Also because of the relationship of curvature, it is necessary to make the distance G smaller, that is, the distance G will change within a certain range according to the diameter ψ. In order to cooperate with the change of the distance G, the distance difference L3 is between 0.1mm-0.4 in this embodiment. between mm.

What needs to be added here is that the cross-sectional shape of the first roller accommodation groove 18 and the cross-sectional shape of the second roller accommodation groove 20 are not limited to arc shapes, and both are rounded triangles in the second embodiment of the present invention. That is, both of them have two inclined surfaces 27 and an arc surface 28 connected between the two inclined surfaces 27, as shown in Figure 15 and Figure 16, and the first roller accommodating groove 18 and the second roller The receiving grooves 20 have the same size. Thereby, when used with the roller 90 , a line contact will be formed with the roller 90 through the two slopes 27 to reduce the friction force between them and effectively prevent the occurrence of stress concentration. As for the operation mode and the effect that can be achieved of the spacer 10' in the second embodiment of the present invention, they are all the same as those in the first embodiment above, and will not be repeated here.

10: spacer 10': spacer 12: First surface 14: second surface 16: oil storage tank 18: The first roller accommodation groove 20: Second roller accommodating groove 22: Identification Department S1: the first use state S2: the second use state 24: The first convex part 26: second convex part 27: Bevel 28: arc surface 29: Fillet P: reference plane D1: The maximum distance between the reference plane and the first convex part D2: The maximum distance between the reference plane and the second convex part C: The center point of the maximum thickness of the spacer C1: The center of the first roller accommodation groove C2: The center of the second roller accommodation groove L1: The horizontal distance between the center of the first roller accommodation groove and the reference plane L2: The horizontal distance between the center of the second roller accommodation groove and the reference plane L3: distance difference 30: cycloid reducer 40: shell 50: shaft 52: input terminal 54: output terminal 60: Input flange 62: The first shaft hole 64: The first connecting column 66: The first bearing 70: output flange 72: Second shaft hole 74: The second connecting column 76:Second bearing 78: Bolt 80:Deceleration device 82: Cycloid wheel 84: Odan coupling 86: needle roller 90: Roller G: The distance between two adjacent rollers G1: End point distance between two adjacent rollers G2: End point distance between two adjacent rollers X: horizontal direction

Fig. 1 is a perspective view of a spacer according to the first embodiment of the present invention. Fig. 2 is a perspective view of the spacer in another perspective according to the first embodiment of the present invention. Fig. 3 is a side view of the spacer in the first use state of the first embodiment of the present invention. Fig. 4 is a side view of the spacer in the second use state of the first embodiment of the present invention. Fig. 5 is a plan view of the spacer in the first embodiment of the present invention, mainly showing the distance difference before and after turning 90 degrees. Fig. 6 is a perspective view of the cycloid reducer of the present invention. FIG. 7 is a partial perspective exploded view of FIG. 6 . Fig. 8 is a perspective view of the cycloid reducer of the present invention from another angle of view. FIG. 9 is a partial perspective exploded view of FIG. 8 . Fig. 10 is a cross-sectional view of the cycloid reducer of the present invention. 11a-11c are perspective views of the use of the spacer with rollers in the first embodiment of the present invention, mainly showing different assembly methods of the rollers. Fig. 12 is a plan view of the first embodiment of the present invention in which the spacer cooperates with rollers in different use states. Fig. 13 is a combined plan view of the output flange and rollers provided by the present invention. FIG. 14 is a partially enlarged view of FIG. 13 . Fig. 15 is a perspective view of a spacer according to a second embodiment of the present invention. Fig. 16 is a side view of a spacer according to a second embodiment of the present invention.

10: spacer

12: First surface

14: second surface

16: oil storage tank

18: The first roller accommodation groove

20: Second roller accommodating groove

22: Identification department

24: The first convex part

Claims (10)

A spacer comprising a first surface and a second surface facing away from the first surface, the first surface and the second surface respectively have two first roller accommodation grooves and two second roller accommodation grooves , the first roller accommodating grooves on the first surface and the second roller accommodating grooves on the first surface are staggered relative to the center of the first surface, and the first roller accommodating grooves on the second surface The roller accommodating grooves and the second roller accommodating grooves on the second surface are staggered relative to the center of the second surface, and the first roller accommodating grooves on the first surface correspond to the second surface The second roller receiving grooves of the first surface, and the second roller receiving grooves of the first surface correspond to the first roller receiving grooves of the second surface, wherein the spacer defines a datum The reference plane is perpendicular to a horizontal direction and passes through a maximum thickness center point of the spacer. The horizontal distance from the reference plane to the center of each of the first roller accommodating grooves is defined as L1, and the reference plane to each of the The horizontal distance between the centers of the second roller accommodating groove is defined as L2, and both satisfy the following relationship: L1>L2. The spacer according to claim 1, wherein a first protrusion is adjacent between the first roller accommodation groove and the second roller accommodation groove of the first surface, and the second surface A second protrusion is adjacent to the first roller accommodation groove and the second roller accommodation groove, and the second protrusions correspond to the first protrusions one-to-one; the reference plane and A maximum distance between the first protrusions is equal to a maximum distance between the reference plane and a second protrusion. The spacer according to claim 1, wherein there is a distance difference between L1 and L2, and the distance difference is between 0.1mm-0.4mm. The spacer according to claim 2, wherein each of the first protrusions and each of the second protrusions has a rounded corner. The spacer as described in claim 1, wherein, the cross-sectional shape of the first roller accommodation grooves and the cross-sectional shape of the second roller accommodation grooves are arc-shaped, and the first roller accommodation grooves The placement groove and the second roller accommodation grooves have the same curvature. The spacer as described in claim 1, wherein the cross-sectional shape of the first roller accommodation grooves and the cross-sectional shape of the second roller accommodation grooves are both rounded triangles, and the first rollers The accommodating groove and the second roller accommodating grooves have the same size. The spacer as described in Claim 1 further includes four identification parts, and the identification parts correspond to the first roller accommodating grooves or the second roller accommodating grooves in a one-to-one manner. The spacer as claimed in claim 7, wherein each identification part is a groove. The spacer as described in claim 1 further includes an oil storage tank, and the oil storage tank runs through the center of the first surface and the center of the second surface. A cycloidal reducer comprising: a shell; A rotating shaft is rotatably installed in the casing and has an input end and an output end; an input flange, rotatably arranged at one end of the housing and rotatably assembled at the input end of the rotating shaft; an output flange, rotatably arranged at the other end of the casing and rotatably assembled at the output end of the rotating shaft, and connected with the input flange; A speed reduction device with at least one cycloidal wheel and at least one Oldham coupling, the cycloidal wheel is eccentrically arranged on the rotating shaft, and the Oldan coupling is arranged between the cycloidal wheel and the input flange or between the cycloid wheel and the output flange; a plurality of rollers disposed between the housing and the input flange and between the housing and the output flange; and A plurality of spacers as described in any one of claims 1 to 9, each of the spacers is arranged between two adjacent rollers, each of the spacers can optionally use the first surface of the first surface The roller receiving grooves or the second roller receiving grooves support a roller, and each of the spacers can be selected by the first roller receiving grooves or the second roller receiving grooves of the second surface. The column accommodating groove supports another roller.

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