Flow generator with sealing plate and method for

Abstract

A fluctuation generator with a sealing plate comprises an elliptical bolt with a rotating shaft, an inner ring of a bearing is sleeved on the peripheral surface of the elliptical bolt, the inner ring and an outer ring of the bearing are changed from a round shape to an oval shape along with the peripheral surface of the elliptical bolt, and the inner ring and the elliptical bolt can rotate together relative to the outer ring by taking the rotating shaft as the center. The inner ring is sleeved with an oval sealing plate, the outer edge of the sealing plate abuts against the outer ring, the sealing plate can be driven by the oval bolt and the inner ring to rotate with the rotating shaft as the center, and one side of each rolling body is shielded by the sealing plate; according to the invention, the plurality of rolling bodies are shielded by the sealing plate which is arranged in the bearing after the bearing is deformed, so that when the fluctuation generator is arranged in the harmonic speed reducer for operation, external dirt is prevented from entering the bearing of the fluctuation generator to influence the operation of the fluctuation generator.

Description

Technical Field

[0001] The invention relates to a wave generator for a harmonic reducer, and in particular to a wave generator with a sealing plate and a mounting method thereof. Background Art

[0002] The existing wave generator is installed in a harmonic reducer, and the wave generator includes an elliptical bolt and a bearing sleeved on the elliptical bolt. When the elliptical bolt rotates, the outer ring of the bearing changes shape with the rotation of the elliptical bolt.

[0003] Although some bearings are provided with an annular sealing ring between the inner and outer rings, this sealing ring is mostly connected to the outer ring and is already set in the bearing when the bearing is assembled. Therefore, the above-mentioned bearing with a sealing ring cannot be directly used as a bearing for a wave generator whose inner and outer rings will be deformed. As a result, the existing harmonic reducers on the market lack means to shield dirt on the outer side of the wave generator bearing. When dirt enters the bearing, it will inevitably hinder the smooth rotation of the bearing, accelerate the oxidation of the internal grease and deteriorate the lubrication function, and thus affect the precision and life of the harmonic reducer. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a wave generator, in which a sealing plate that can rotate with the elliptical bolt and shield one side of the bearing is arranged in a flexible bearing that is fitted on the elliptical bolt and has been deformed, so as to prevent external dirt from entering the bearing of the wave generator and thus affecting the operation of the wave generator.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a wave generator with a sealing plate, comprising an elliptical bolt, a bearing, and a sealing plate. The elliptical bolt has a rotation axis and a first long axis and a first short axis of unequal length; the rotation axis passes through the center of the elliptical bolt. The bearing is a flexible bearing and comprises an inner ring, an outer ring, and a plurality of rolling bodies; the inner ring is fitted on the circumference of the elliptical bolt so that the shape of the inner ring changes from a circle to an ellipse along with the circumference; the outer ring is coupled to the periphery of the inner ring through the plurality of rolling bodies, and the inner ring and the elliptical bolt can rotate relative to the outer ring with the rotation axis as the center. The sealing plate has a second long axis and a second short axis of unequal length; the directions of the second long axis and the second short axis of the sealing plate are in the same direction as the directions of the first long axis and the first short axis of the elliptical bolt, the sealing plate is fitted on the inner ring of the bearing with an inner edge and contacts the outer ring with an outer edge, the sealing plate can be driven by the elliptical bolt and the inner ring to rotate with the rotation axis as the center, and the sealing plate is shielded on one side of the plurality of rolling bodies.

[0006] The wave generator with a sealing plate is composed of an installation method, and the steps of the installation method include: the inner ring, the outer ring and the plurality of rolling elements form a bearing. The elliptical bolt is inserted into the inner ring of the bearing, so that the inner ring is fitted on the circumferential surface of the elliptical bolt, and the inner ring and the outer ring change from circular to elliptical as the shape of the circumferential surface changes. The sealing plate is inserted between the inner ring and the outer ring of the bearing, so that the inner edge of the sealing plate is fitted on the inner ring of the bearing, and the outer edge of the sealing plate contacts the outer ring. The sealing plate can be driven by the elliptical bolt and the inner ring to rotate around the rotation axis, and the sealing plate is shielded on one side of the plurality of rolling elements.

[0007] The effect of the present invention is that after the bearing sleeve is deformed by the elliptical bolt, a sealing plate for shielding the multiple rolling elements is arranged on the deformed inner ring, so that the sealing plate can rotate with the inner ring and the elliptical bolt, and the outer edge always keeps in contact with the outer ring. In this way, when the present invention is installed in the operation of the harmonic reducer, it can prevent external dirt from entering the bearing of the wave generator to affect the operation of the wave generator, so as to achieve the technical effect of keeping the operation of the wave generator smooth. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a stereogram of a preferred embodiment of the present invention.

[0009] Figure 2 It is an exploded view of the above preferred embodiment of the present invention.

[0010] Figure 3 It is a plan view of the elliptical bolt according to the above preferred embodiment of the present invention.

[0011] Figure 4 It is a plan view of the sealing plate according to the above preferred embodiment of the present invention.

[0012] Figure 5 It is a top view of the above preferred embodiment of the present invention.

[0013] Figure 6 for Figure 5 Cross-sectional view in the 6-6 direction.

[0014] Figure 7 for Figure 6 The enlarged view is marked as A1.

[0015] Figure 8 This is a schematic diagram of the implementation of the present invention of inserting an elliptical bolt into a bearing.

[0016] Fig. 9 This is a schematic diagram of the implementation of inserting a sealing plate into an elliptical bearing according to the present invention.

[0017] Description of reference numerals:

[0018] 100: Wave generator with sealing plate

[0019] 10: Oval bolt

[0020] 12: Circumference

[0021] 20: Bearing

[0022] 22: Inner Circle

[0023] 221: Outer surface

[0024] 222: Inner ball track

[0025] 223: Sealing plate groove

[0026] 24: Outer ring

[0027] 241: Inner Surface

[0028] 242: External ball track

[0029] 26: Rolling element

[0030] 28: Retainer

[0031] 30: Sealing plate

[0032] 301: Inner Edge

[0033] 302: Outer Edge

[0034] 32: Core ring

[0035] 34: Elastic covering

[0036] 341: Fork

[0037] L: Rotation axis

[0038] MA1: First major axis

[0039] MA2: Second major axis

[0040] MI1: First minor axis

[0041] MI2: Second minor axis

[0042] P1: First intersection point

[0043] P2: Second intersection point DETAILED DESCRIPTION

[0044] In order to more clearly illustrate the present invention, preferred embodiments are given and described in detail with reference to the accompanying drawings. Figures 1 to 7FIG. 1 is a wave generator 100 with a sealing plate according to a preferred embodiment of the present invention. The wave generator 100 with a sealing plate is used to be installed on an existing harmonic reducer to drive the harmonic reducer to operate. The wave generator 100 with a sealing plate includes an elliptical bolt 10, a bearing 20, and a sealing plate 30, wherein:

[0045] Please see Figures 1 to 3 As shown, the elliptical bolt 10 is the same as the elliptical bolt of the existing wave generator, having a rotation axis L and a first major axis MA1 and a first minor axis MI1 of unequal length, wherein the first major axis MA1 intersects with the first minor axis MI1 and has a first intersection point P1 at the intersection, the first intersection point P1 is located at the center of the elliptical bolt 10, and the rotation axis L passes through the first intersection point P1. The elliptical bolt 10 has an elliptical peripheral surface 12, and in order to clearly show that the contour of the peripheral surface 12 in the drawings is non-circular, the elliptical bolt 10 is drawn in the drawings of this preferred embodiment in a manner that the length difference between the first major axis MA1 and the first minor axis MI1 is more clearly visible.

[0046] Please see Figure 2 as well as Figures 5 to 7 As shown, the bearing 20 is an axial bearing and includes an inner ring 22, an outer ring 24 and a plurality of rolling elements 26. The inner ring 22 is fitted on the circumference 12 of the oval bolt 10, so that the shape of the inner ring 22 changes from the original circular shape to the elliptical shape along with the circumference 12. The outer ring 24 is coupled to the periphery of the inner ring 22 through the plurality of rolling elements 26. In this preferred embodiment, the plurality of rolling elements 26 are balls, and the inner ring 22 has an outer circumference 221, and an inner ball track 222 is formed in the middle of the outer circumference 221. The outer ring 24 has an inner circumference 241, and an outer ball track 242 is formed in the middle of the inner circumference 241. The plurality of rolling elements 26 are disposed between the inner ball track 222 and the outer ball track 242 in a rolling or sliding manner, and a retainer 28 is disposed between the plurality of rolling elements 26. The plurality of rolling bodies 26 abut between the inner ring 22 and the outer ring 24, so that the shape of the outer ring 24 is deformed from the original circular shape to an elliptical shape following the shape of the inner ring 22. Since the inner ring 22 is fitted on the elliptical bolt 10 for fixing, and the plurality of rolling bodies 26 are arranged between the inner ring 22 and the outer ring 24, the inner ring 22 and the elliptical bolt 10 can rotate relative to the outer ring 24 with the rotation axis L as the center.

[0047] Please see Figure 1 as well as Figures 4 to 7As shown, the sealing plate 30 has a second major axis MA2 and a second minor axis MI2 of unequal lengths, and the second major axis MA2 intersects with the second minor axis MI2 and has a second intersection point P2 at the intersection. The directions of the second major axis MA2 and the second minor axis MI2 of the sealing plate 30 are in the same direction as the directions of the first minor axis MI1 and the first minor axis MI1 of the elliptical bolt 10, and the rotation axis L passes through the second intersection point P2. The inner and outer sides of the sealing plate 30 respectively have an inner edge 301 and an outer edge 302, and the inner edge 301 of the sealing plate 30 is fitted on the inner ring 22 of the bearing 20 for fixing, and the outer edge 302 of the sealing plate 30 abuts against the inner circumferential surface 241 of the outer ring 24. Therefore, the sealing plate 30 can be driven by the elliptical bolt 10 and the inner ring 22 to rotate around the rotation axis L, and the sealing plate 30 is shielded on one side of the plurality of rolling elements 26.

[0048] When the preferred embodiment of the present invention is used, the wave generator 100 with the sealing plate is installed in the existing harmonic reducer. One side of the bearing 20 along the opposite sides of the rotation axis L faces the inside of the harmonic reducer, and the other side is exposed to the harmonic reducer. Since the sealing plate 30 is elliptical and is fitted on the elliptical bolt 10 and fixed after the inner ring 22 is deformed along the circumferential surface 12 of the elliptical bolt 10, the sealing plate 30 can rotate with the elliptical bolt 10 and the inner ring 22, and during the process, its outer edge 302 remains in contact with the inner circumferential surface 241 of the outer ring 24, and the sealing function is not affected by the continuous deformation of the outer ring 24 as the elliptical bolt 10 rotates. The bearing 20 is exposed on one side of the harmonic reducer. Since it is shielded by the sealing plate 30, it can prevent external dirt from entering the bearing 20 from between the inner ring 22 and the outer ring 24. No dirt will affect the rolling or sliding of the multiple rolling elements 26, thereby ensuring the stability and life of the operation of the present invention when used to drive the harmonic reducer.

[0049] Please see Figure 2 as well as Figure 6 to Figure 7As shown, the above preferred embodiment further forms a sealing plate embedding groove 223 on the outer circumferential surface 221 of the inner ring 22. The inner edge 301 of the sealing plate 30 is embedded in the sealing plate embedding groove 223 and fixed. Specifically, the sealing plate 30 includes a core ring 32 and an elastic coating body 34 wrapped around the core ring 32, the core ring 32 is an elliptical annular sheet, the outer ring 24 is a polymer elastomer such as rubber or plastic that is coated and injected around the core ring 32, the inner edge 301 and the outer edge 302 are respectively arranged on the inner side and the outer side of the elastic coating body 34, and the elastic coating body 34 has a fork portion 341 at the outer edge 302, and the fork portion 341 abuts against the inner circumferential surface 241 of the outer ring 24.

[0050] Compared with the existing bearings, which have a sealing plate after assembly, so that the distance between the inner ring and the outer ring is fixed, and thus cannot be fitted into the assembly structure of the oval bolt 10. The present invention uses a different installation method from the existing bearings, so that the sealing plate 30 can be set in the deformed bearing 20, and during the operation of the wave generator 100 with the sealing plate, it is not affected by the deformation of the outer ring 24, and can always cover one side between the inner ring 22 and the outer ring 24. The steps include:

[0051] The inner ring 22 , the outer ring 24 and the plurality of rolling elements 26 constitute the above-mentioned bearing 20 . At this time, the inner ring 22 and the outer ring 24 of the bearing 20 are both in a circular state, and the plurality of rolling elements 26 abut between the inner ring 22 and the outer ring 24 .

[0052] The above-mentioned elliptical elliptical bolt 10 is inserted into the inner ring 22 of the bearing 20, so that the inner ring 22 of the bearing 20 fits on the circumferential surface 12 of the elliptical bolt 10. During the process of inserting the elliptical bolt 10 into the inner ring 22, the shapes of the inner ring 22 and the outer ring 24 will change from circular to elliptical along with the shape of the circumferential surface 12. At this time, the inner ring 22 and the elliptical bolt 10 can rotate relative to the outer ring 24 with the rotation axis L as the center.

[0053] Insert the sealing plate 30 between the inner ring 22 and the outer ring 24 of the bearing 20 so that the inner edge 301 of the sealing plate 30 fits on the inner ring 22 of the bearing 20 and the outer edge 302 of the sealing plate 30 contacts the outer ring 24. Figure 1 as well as Figure 5 , Figure 6As shown, since the sealing plate 30 is fitted on the non-circular inner ring 22 and the periphery of the elliptical bolt 10, the sealing plate 30 can be driven by the elliptical bolt 10 and the inner ring 22 to rotate around the rotation axis L. During its rotation, the sealing plate 30 always contacts the outer ring 24 with the outer edge 302, and the sealing plate 30 is shielded on one side of the multiple rolling elements 26 to prevent external dirt from entering the bearing 20 from here, thereby ensuring that the elliptical bolt 10 and the inner ring 22 can rotate smoothly through the multiple rolling elements 26 against the outer ring 24.

[0054] The above descriptions are only preferred feasible embodiments of the present invention. Any equivalent changes made by applying the description and claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A wave generator with a sealing plate, comprising: An elliptical bolt having a rotation axis and a first major axis and a first minor axis of unequal lengths; the rotation axis passes through the center of the elliptical bolt; A bearing is a flexible bearing and includes an inner ring, an outer ring and a plurality of rolling elements; the inner ring is fitted on a circumferential surface of the elliptical bolt so that the shape of the inner ring changes from a circle to an elliptical shape along with the circumferential surface; the outer ring is coupled to the periphery of the inner ring through the plurality of rolling elements, and the inner ring and the elliptical bolt can rotate relative to the outer ring with the rotation axis as the center; and A sealing plate having a second major axis and a second minor axis of unequal lengths; the directions of the second major axis and the second minor axis of the sealing plate are in the same direction as the directions of the first major axis and the first minor axis of the elliptical bolt, the sealing plate is fitted on the inner ring of the bearing with an inner edge and abuts against the outer ring with an outer edge, the sealing plate can be driven by the elliptical bolt and the inner ring to rotate around the rotating axis, and the sealing plate is shielded on one side of the multiple rolling bodies.

2. The wave generator with a sealing plate as described in claim 1, wherein the inner ring has an outer peripheral surface, and a sealing plate embedding groove is formed on the outer peripheral surface; the inner edge of the sealing plate is embedded in the sealing plate embedding groove.

3. A wave generator with a sealing plate as described in claim 1 or 2, wherein the sealing plate includes a core ring and an elastic covering body wrapped around the core ring, and the inner edge and the outer edge are respectively arranged on the inner side and the outer side of the elastic covering body.

4. The wave generator with a sealing plate as described in claim 3, wherein the core ring is an elliptical annular sheet, and the elastic covering body has a fork portion at the outer edge, and the fork portion abuts against an inner circumferential surface of the outer ring.

5. A method for installing a wave generator having a sealing plate, the steps comprising: Prepare a bearing, which is a flexible bearing and includes an inner ring, an outer ring, and a plurality of rolling bodies that can rollably abut between the inner ring and the outer ring; Inserting an elliptical bolt into the inner ring of the bearing, so that the inner ring fits on the circumferential surface of the elliptical bolt, the inner ring and the outer ring change from circular to elliptical as the shape of the circumferential surface changes, and the inner ring and the elliptical bolt can rotate relative to the outer ring with a rotation axis of the elliptical bolt as the center; and A sealing plate is inserted between the inner ring and the outer ring of the bearing so that the inner edge of the sealing plate fits on the inner ring of the bearing and the outer edge of the sealing plate contacts the outer ring. The sealing plate can be driven by the elliptical bolt and the inner ring to rotate around the rotating axis, and the sealing plate covers one side of the multiple rolling bodies.

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