CN218953935U - Offset transmission structure - Google Patents

Abstract

The utility model relates to the technical field of transmission equipment, and provides a bias transmission structure, which comprises: the device comprises a shell, a rotating shaft with a first axis, a first eccentric wheel, a second eccentric wheel, a first outer gear ring, a second outer gear ring and an inner gear ring; the diameter of the first eccentric wheel is the same as that of the second eccentric wheel; the first axis, the second axis and the third axis are positioned on the same plane, and the first axis, the second axis and the third axis are mutually parallel; the first axis is located between the second axis and the third axis; the distance between the first axis and the second axis is a preset distance, and the distance between the first axis and the third axis is the preset distance; the first eccentric wheel and the first eccentric wheel are arranged at intervals in the extending direction of the rotating shaft; the first external gear ring and the second external gear ring are respectively meshed with the inner gear ring.

Description

Offset transmission structure

Technical Field

The utility model belongs to the technical field of transmission equipment, and particularly relates to a bias transmission structure.

Background

In modern electromechanical systems, the rotational speed of the input shaft is often required to be regulated. In order to achieve adjustment of the rotational speed of the input shaft, eccentric structures are often used. The specific way of realizing the rotation speed adjustment of the input shaft by the eccentric structure can be seen (Chinese patent application; publication number: CN2221687Y; subject name: a planetary reducer with small tooth difference; publication date: 1996.03.06), please see page 2 of the specification, the center of the annular plate is provided with an inner gear ring 11, and the annular plate is provided with three matching holes 12, 13 and 14 matched with the eccentric wheel; the three high-speed shafts 15, 16 and 17 (the high-speed shafts correspond to the input shafts) can rotate, eccentric wheels 18 are respectively arranged on each high-speed shaft, the eccentric wheels are arranged in the matching holes in a one-to-one correspondence mode, when the high-speed shafts rotate, the eccentric wheels on the high-speed shafts drive the annular plate to do plane motion, the annular gear on the annular plate drives the outer gear on the low-speed shaft to rotate, a tooth difference exists between the outer gear on the low-speed shaft and the annular gear, and the change of the rotating speed can be achieved. However, in the process that the high-speed shaft drives the annular plate to do plane motion, the annular plate can shake in the direction perpendicular to the high-speed shaft, and the shaking of the annular plate can cause the high-speed shaft to shake in the direction perpendicular to the high-speed shaft.

Disclosure of Invention

The utility model aims to provide an offset transmission structure so as to solve the technical problem that the input shaft is easy to vibrate in the direction perpendicular to the input shaft when the speed of the input shaft is changed through an eccentric structure in the prior art.

In order to achieve the above purpose, the utility model adopts the following technical scheme: there is provided an offset drive arrangement comprising: the device comprises a shell, a rotating shaft with a first axis, a first eccentric wheel arranged on the rotating shaft and provided with a second axis, a second eccentric wheel arranged on the rotating shaft and provided with a third axis, a first outer gear ring which is coaxially sleeved on the first eccentric wheel and provided with a plurality of first tooth parts in a ring mode on the outer wall, a second outer gear ring which is coaxially sleeved on the second eccentric wheel and provided with a plurality of second tooth parts in a ring mode on the outer wall, and an inner gear ring which is sleeved on the outer sides of the first outer gear ring and the second outer gear ring and provided with a plurality of third tooth parts in a ring mode on the inner wall; the diameter of the first eccentric wheel is the same as that of the second eccentric wheel, and the outer diameters of the first outer gear ring and the second outer gear ring are the same; the first axis, the second axis and the third axis are positioned on the same plane, and the first axis, the second axis and the third axis are mutually parallel; the second axis and the third axis are symmetrically arranged at two sides of the first axis; the first eccentric wheel and the first eccentric wheel are arranged at intervals in the extending direction of the rotating shaft; the first outer gear ring and the second outer gear ring are respectively meshed with the inner gear ring, the number of the third tooth parts is larger than that of the first tooth parts, and the number of the third tooth parts is larger than that of the second tooth parts.

Further, the axis of the first outer ring gear and the second axis coincide.

Further, the axis of the second external ring gear and the third axis coincide.

Further, the rotating shaft and the first eccentric wheel are integrally formed.

Further, the rotating shaft and the second eccentric wheel are integrally formed.

Further, a first bearing is provided between the first outer ring gear and the first eccentric.

Further, the number of the first bearings is a plurality; a plurality of the first bearings are disposed along the second axis.

Further, a second bearing is provided between the second outer ring gear and the second eccentric.

Further, the number of the second bearings is a plurality; a plurality of the second bearings are disposed along the third axis.

Further, the inner gear ring and the rotating shaft are coaxially arranged.

The bias transmission structure provided by the utility model has the beneficial effects that: compared with the prior art, the offset transmission structure provided by the utility model has the advantages that the rotating shaft (1) can rotate around the first axis of the rotating shaft, the rotating shaft is provided with the first eccentric wheel and the second eccentric wheel, the second axis of the first eccentric wheel is parallel to the first axis of the rotating shaft, and the third axis of the second eccentric wheel is parallel to the first axis of the rotating shaft; the first eccentric wheel is arranged on the rotating shaft, and the second eccentric wheel is arranged on the rotating shaft; the rotating shaft drives the first eccentric wheel to move around the first axis when rotating, and drives the second eccentric wheel to move around the first axis when rotating; the first eccentric wheel and the first eccentric wheel are arranged at intervals in the extending direction of the rotating shaft, so that mutual collision interference between the first eccentric wheel and the second eccentric wheel is reduced; 【2】 The first eccentric wheel is sleeved with a first outer gear ring, the first eccentric wheel and the first outer gear ring are coaxially arranged, and the first eccentric wheel and the first outer gear ring can rotate relatively; the first outer gear ring is positioned in the inner gear ring, the first tooth part at the outer edge of the first outer gear ring is meshed with the third tooth part on the inner wall of the inner gear ring, and the inner gear ring is coaxially arranged with the rotating shaft; when the rotating shaft rotates, the first eccentric wheel moves around a first axis of the rotating shaft, the first eccentric wheel moves around the first axis to drive the first outer gear ring sleeved on the first eccentric wheel to move around the first axis, and as the rotating shaft and the inner gear ring are coaxially arranged, the first tooth part of the first outer gear ring is meshed with the third tooth part on the inner wall of the inner gear ring, and when the first outer gear ring moves around the first axis, the first outer gear ring is meshed with the inner gear ring, and the first outer gear ring rolls along the inner gear ring; 【3】 Similarly, a second outer gear ring is sleeved on the second eccentric wheel, the second eccentric wheel and the second outer gear ring are coaxially arranged, and the second eccentric wheel and the second outer gear ring can relatively rotate; the second outer gear ring is positioned in the inner gear ring, the second tooth part at the outer edge of the second outer gear ring is meshed with the third tooth part on the inner wall of the inner gear ring, and the inner gear ring is coaxially arranged with the rotating shaft; when the rotating shaft rotates, the second eccentric wheel moves around the first axis of the rotating shaft, the second eccentric wheel moves around the first axis to drive the second outer gear ring sleeved on the second eccentric wheel to move around the first axis, and as the rotating shaft and the inner gear ring are coaxially arranged, the second tooth part on the second outer gear ring is meshed with the third tooth part on the inner wall of the inner gear ring, and when the second outer gear ring moves around the first axis, the second outer gear ring is meshed with the inner gear ring, and the second outer gear ring rolls along the inner gear ring; 【4】 The number of the third tooth parts is larger than that of the first tooth parts, the number of the third tooth parts is larger than that of the second tooth parts, so that the number of teeth difference exists between the inner gear ring and the first outer gear ring and the second outer gear ring respectively, when the rotating shaft drives the first outer gear ring to roll along the inner gear ring, the rotating shaft and the first outer gear ring have rotating speed difference [ 5 ], as the second axis of the first eccentric wheel and the third axis of the second eccentric wheel are respectively parallel to the first axis of the rotating shaft, the second axis and the third axis are symmetrically arranged on two sides of the first axis, and as the first eccentric wheel and the first outer gear ring are coaxially arranged, the second eccentric wheel and the second outer gear ring are coaxially arranged, and the outer diameter of the first outer gear ring is identical to the outer diameter of the second outer gear ring; the first outer gear ring and the second outer gear ring are respectively offset at two opposite sides of the first axis (namely, the second axis of the first outer gear ring and the third axis of the second outer gear ring are respectively offset at two opposite sides of the first axis), the rotating shaft is meshed with a third tooth part on the inner wall of one end of the inner gear ring through the first outer gear ring, and the rotating shaft is meshed with a third tooth part on the inner wall of the other end of the second outer gear ring, opposite to the inner gear ring, through the first outer gear ring and the second outer gear ring, namely, the rotating shaft is respectively supported at two opposite ends of the inner gear ring, so that the stability of the rotating shaft is conveniently kept, and the rotating shaft is not easy to vibrate in the rotating process.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic perspective view of a rotating shaft, a first eccentric wheel, and a second eccentric wheel according to an embodiment of the present utility model;

FIG. 2 is a schematic top view of a bias drive structure according to an embodiment of the present utility model;

fig. 3 is a schematic perspective view of a rotating shaft, a first outer gear ring and a second outer gear ring according to an embodiment of the present utility model;

fig. 4 is a schematic perspective view of a first outer gear ring, a second outer gear ring and an inner gear ring according to an embodiment of the present utility model.

Wherein, each reference sign in the figure:

11-a housing; 12-rotating shaft; 21-a first eccentric; 22-a second eccentric; 31-a first external ring gear; 311-first tooth; 32-a second outer ring gear; 321-a second tooth; 33-an inner gear ring; 331-third tooth.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It should be noted that, in the description of the embodiments of the present application, unless otherwise indicated, "/" means or, for example, a/B may represent a or B; "and/or" herein is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. Wherein A and B may be singular or plural, respectively.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Referring to fig. 1 to 4, a description will now be given of a bias transmission structure provided by the present utility model. The offset drive structure includes: the rotary shaft 12 with the first axis, the first eccentric wheel 21 arranged on the rotary shaft 12 and provided with the second axis, the second eccentric wheel 22 arranged on the rotary shaft 12 and provided with the third axis, the first outer gear ring 31 which is coaxially sleeved on the first eccentric wheel 21 and provided with a plurality of first tooth parts 311 on the outer wall in a rotating way, the second outer gear ring 32 which is coaxially sleeved on the second eccentric wheel 22 and provided with a plurality of second tooth parts 321 on the outer wall in a rotating way, and the inner gear ring 33 which is sleeved on the outer sides of the first outer gear ring 31 and the second outer gear ring 32 and provided with a plurality of third tooth parts 331 on the inner wall in a surrounding way; the diameter of the first eccentric wheel 21 is the same as that of the second eccentric wheel 22, and the outer diameters of the first outer gear ring 31 and the second outer gear ring 32 are the same; the first axis, the second axis and the third axis are positioned on the same plane, and are mutually parallel; the second axis and the third axis are symmetrically arranged at two sides of the first axis; the first eccentric wheel 21 and the first eccentric wheel 21 are arranged at intervals in the extending direction of the rotating shaft 12; the first and second external ring gears 31 and 32 are engaged with the ring gear 33, respectively, the number of the third teeth 331 is greater than the number of the first teeth 311, and the number of the third teeth 331 is greater than the number of the second teeth 321.

Thus, the rotating shaft 12 can rotate around the first axis thereof, the rotating shaft 12 is provided with the first eccentric wheel 21 and the second eccentric wheel 22, the second axis of the first eccentric wheel 21 is parallel to the first axis of the rotating shaft 12, and the third axis of the second eccentric wheel 22 is parallel to the first axis of the rotating shaft 12; the first eccentric wheel 21 is arranged on the rotating shaft 12, and the second eccentric wheel 22 is arranged on the rotating shaft 12; the first eccentric wheel 21 is driven to move around the first axis when the rotating shaft 12 rotates, and the second eccentric wheel 22 is driven to move around the first axis when the rotating shaft 12 rotates; in the extending direction of the rotating shaft 12, the first eccentric wheel 21 and the first eccentric wheel 21 are arranged at intervals, so that mutual collision interference between the first eccentric wheel 21 and the second eccentric wheel 22 is reduced; 【2】 The first eccentric wheel 21 is sleeved with a first outer gear ring 31, the first eccentric wheel 21 and the first outer gear ring 31 are coaxially arranged, and the first eccentric wheel 21 and the first outer gear ring 31 can relatively rotate; the first outer gear ring 31 is positioned in the inner gear ring 33, the first tooth part 311 at the outer edge of the first outer gear ring 31 is meshed with the third tooth part 331 on the inner wall of the inner gear ring 33, and the inner gear ring 33 is coaxially arranged with the rotating shaft 12; when the rotating shaft 12 rotates, the first eccentric wheel 21 moves around the first axis of the rotating shaft 12, the first eccentric wheel 21 moves around the first axis to drive the first outer gear ring 31 sleeved on the first eccentric wheel 21 to move around the first axis, and as the rotating shaft 12 and the inner gear ring 33 are coaxially arranged, the first tooth part 311 on the first outer gear ring 31 is meshed with the third tooth part 331 on the inner wall of the inner gear ring 33, and when the first outer gear ring 31 moves around the first axis, the first outer gear ring 31 is meshed with the inner gear ring 33, and the first outer gear ring 31 rolls along the inner gear ring 33; 【3】 Similarly, a second outer gear ring 32 is sleeved on the second eccentric wheel 22, the second eccentric wheel 22 and the second outer gear ring 32 are coaxially arranged, and the second eccentric wheel 22 and the second outer gear ring 32 can relatively rotate; the second outer gear ring 32 is positioned in the inner gear ring 33, and the second tooth 321 at the outer edge of the second outer gear ring 32 is meshed with the third tooth 331 on the inner wall of the inner gear ring 33, and the inner gear ring 33 is coaxially arranged with the rotating shaft 12; when the rotating shaft 12 rotates, the second eccentric wheel 22 moves around the first axis of the rotating shaft 12, the second eccentric wheel 22 moves around the first axis to drive the second outer gear ring 32 sleeved on the second eccentric wheel 22 to also move around the first axis, and as the rotating shaft 12 and the inner gear ring 33 are coaxially arranged, the second tooth 321 on the second outer gear ring 32 is meshed with the third tooth 331 on the inner wall of the inner gear ring 33, and when the second outer gear ring 32 moves around the first axis, the second outer gear ring 32 is meshed with the inner gear ring 33, and the second outer gear ring 32 rolls along the inner gear ring 33; 【4】 The number of the third teeth 331 is greater than that of the first teeth 311, the number of the third teeth 331 is greater than that of the second teeth 321, so that the number of teeth difference exists between the inner gear ring 33 and the first outer gear ring 31 and the second outer gear ring 32 respectively, when the rotating shaft 12 drives the first outer gear ring 31 to roll along the inner gear ring 33, the rotating shaft 12 and the first outer gear ring 31 have the rotating speed difference [ 5 ], because the second axis of the first eccentric wheel 21 and the third axis of the second eccentric wheel 22 are respectively parallel to the first axis of the rotating shaft 12, the second axis and the third axis are symmetrically arranged at two sides of the first axis, and because the first eccentric wheel 21 and the first outer gear ring 31 are coaxially arranged, the second eccentric wheel 22 and the second outer gear ring 32 are coaxially arranged, and the outer diameter of the first outer gear ring 31 and the outer diameter of the second outer gear ring 32 are the same; i.e. the first external gear ring 31 and the second external gear ring 32 are respectively offset on opposite sides of the first axis (i.e. the second axis of the first external gear ring 31 and the third axis of the second external gear ring 32 are respectively offset on opposite sides of the first axis), the rotating shaft 12 is meshed with the third tooth 331 on the inner wall of one end of the ring gear 33 on the first external gear ring 31, the rotating shaft 12 is meshed with the third tooth 331 on the inner wall of the other end of the second external gear ring 32 opposite to the ring gear 33, i.e. the rotating shaft 12 is respectively supported on opposite ends of the internal gear ring 33 by the first external gear ring 31 and the second external gear ring 32, so as to keep the rotating shaft 12 stable, and the rotating shaft 12 is not easy to vibrate in the direction perpendicular to the rotating shaft 12 during the rotation.

In one embodiment, the shaft 12 is axisymmetric about the first axis.

In one embodiment, the first eccentric 21 is axisymmetric about the second axis.

In one embodiment, the first outer ring gear 31 is axisymmetric about the second axis.

In one embodiment, the second eccentric 22 is axisymmetric with respect to the third axis.

In one embodiment, the second outer ring gear 32 is axisymmetric about the third axis.

In one embodiment, the outer diameter of the first outer ring gear 31 is the same as the outer diameter of the second outer ring gear 32.

In one embodiment, the first outer ring gear 31 is annular in shape.

In one embodiment, the second outer ring gear 32 is annular in shape.

In one embodiment, the first axis is located between the second axis and the third axis; the distance between the first axis and the second axis is a predetermined distance, and the distance between the first axis and the third axis is a predetermined distance.

In one embodiment, the radius of the first outer ring gear 31 is assumed to be R1, the radius of the second outer ring gear 32 is assumed to be R1, the diameter of the ring gear 33 is assumed to be D, the distance between the first axis and the second axis is assumed to be L1, and the distance between the first axis and the third axis is assumed to be L2; wherein r1+r2+l1+l2=d.

Further, referring to fig. 1 to 4, as an embodiment of the offset transmission structure provided in the present utility model, the axis of the first external gear ring 31 coincides with the second axis. In this way, the first ring gear 31 is facilitated to rotate about the second axis.

Further, referring to fig. 1 to 4, as an embodiment of the offset transmission structure provided in the present utility model, the axis of the second external ring gear 32 coincides with the third axis. In this manner, the second outer ring gear 32 is facilitated to rotate about the third axis.

Further, referring to fig. 1 to 4, as an embodiment of the offset transmission structure provided by the present utility model, the rotating shaft 12 and the first eccentric 21 are integrally formed. Thus, the rotation shaft 12 and the first eccentric wheel 21 are not easy to loosen.

Further, referring to fig. 1 to 4, as an embodiment of the offset transmission structure provided in the present utility model, the rotating shaft 12 and the second eccentric 22 are integrally formed. Thus, the rotation shaft 12 and the second eccentric 22 are not easy to loosen.

Further, referring to fig. 1 to 4, as a specific embodiment of the offset transmission structure provided by the present utility model, a first bearing is disposed between the first outer ring gear 31 and the first eccentric 21. In this way, the first outer ring gear 31 is facilitated to rotate about the first eccentric 21.

Further, referring to fig. 1 to fig. 4, as a specific embodiment of the offset transmission structure provided by the present utility model, the number of the first bearings is plural; the first plurality of bearings is disposed along the second axis. In this way, the plurality of first bearings can be shared, and stress between the first external gear and the first eccentric 21.

Further, referring to fig. 1 to 4, as an embodiment of the offset transmission structure provided in the present utility model, a second bearing is provided between the second outer ring gear 32 and the second eccentric 22. In this manner, the second outer ring gear 32 is facilitated to rotate about the second eccentric 22.

Further, referring to fig. 1 to fig. 4, as a specific embodiment of the offset transmission structure provided by the present utility model, the number of second bearings is plural; the plurality of second bearings are disposed along the third axis. In this manner, the plurality of second bearings may share the stress between the second outer gear and the second eccentric 22.

Further, referring to fig. 1 to 4, as an embodiment of the offset transmission structure provided by the present utility model, the ring gear 33 is disposed coaxially with the rotating shaft 12. Thus, the rotation of the rotating shaft 12 is convenient to keep stable when the rotating shaft 12 rotates.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present utility model, and these modifications and substitutions should also be considered as being within the scope of the present utility model.

Claims (10)

1. An offset drive train structure comprising: the device comprises a shell (11), a rotating shaft (12) with a first axis, a first eccentric wheel (21) arranged on the rotating shaft (12) and provided with a second axis, a second eccentric wheel (22) arranged on the rotating shaft (12) and provided with a third axis, a first outer gear ring (31) which is coaxially sleeved on the first eccentric wheel (21) and provided with a plurality of first teeth parts (311) on the outer wall in a surrounding manner, a second outer gear ring (32) which is coaxially sleeved on the second eccentric wheel (22) and provided with a plurality of second teeth parts (321) on the outer wall in a surrounding manner, and an inner gear ring (33) which is sleeved outside the first outer gear ring (31) and the second outer gear ring (32) and provided with a plurality of third teeth parts (331) on the inner wall in a surrounding manner; the diameter of the first eccentric wheel (21) is the same as the diameter of the second eccentric wheel (22), and the outer diameters of the first outer gear ring (31) and the second outer gear ring (32) are the same; the first axis, the second axis and the third axis are positioned on the same plane, and the first axis, the second axis and the third axis are mutually parallel; the second axis and the third axis are symmetrically arranged at two sides of the first axis; in the extending direction of the rotating shaft (12), the first eccentric wheel (21) and the first eccentric wheel (21) are arranged at intervals; the first outer gear ring (31) and the second outer gear ring (32) are respectively meshed with the inner gear ring (33), the number of the third teeth (331) is larger than that of the first teeth (311), and the number of the third teeth (331) is larger than that of the second teeth (321).

2. A biased drive structure as claimed in claim 1, wherein the axis of said first external ring gear (31) and said second axis coincide.

3. Offset gearing structure according to claim 1, characterized in that the axis of said second external toothing (32) and said third axis coincide.

4. Offset gearing structure according to claim 1, characterized in that said spindle (12) and said first eccentric (21) are integral.

5. The offset drive arrangement of claim 1, wherein the shaft (12) and the second eccentric (22) are integrally formed.

6. Offset gearing structure according to claim 1, characterized in that a first bearing is arranged between the first external toothing (31) and the first eccentric (21).

7. The offset drive train structure of claim 6, wherein the number of first bearings is a plurality; a plurality of the first bearings are disposed along the second axis.

8. Offset gearing structure according to claim 1, characterized in that a second bearing is arranged between the second external gear ring (32) and the second eccentric (22).

9. The offset drive train structure of claim 8, wherein the number of second bearings is a plurality; a plurality of the second bearings are disposed along the third axis.

10. The offset transmission structure according to claim 1, wherein the ring gear (33) is disposed coaxially with the rotation shaft (12).

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