CN215370809U

CN215370809U - Transmission mechanism

Info

Publication number: CN215370809U
Application number: CN202121002619.8U
Authority: CN
Inventors: 龙帅; 陈进
Original assignee: Guangdong Dongjian Automobile Technology Co Ltd
Current assignee: Guangdong Dongjian Automobile Technology Co Ltd
Priority date: 2021-05-11
Filing date: 2021-05-11
Publication date: 2021-12-31
Anticipated expiration: 2031-05-11

Abstract

The utility model relates to a transmission mechanism, comprising: a drive shaft; the input unit comprises an input shaft and a transmission disc, the transmission disc is rotatably sleeved on the transmission shaft, the input shaft is in transmission connection with the transmission disc, and the transmission disc rotates around the transmission shaft under the action of the input shaft; the primary transmission unit is positioned on one axial side of the transmission disc and is in transmission connection with the transmission disc; the second-stage transmission unit is positioned on the other axial side of the transmission disc and is in transmission connection with the first-stage transmission unit; the first-stage transmission unit outputs the motion rotating around the transmission shaft axially at the first rotating speed under the driving of the transmission disc, the second-stage transmission unit outputs the motion rotating around the transmission shaft axially at the second rotating speed under the driving of the first-stage transmission unit, and the transmission mechanisms can respectively output the motion at two opposite axial sides of the transmission disc to realize bidirectional output. Meanwhile, the secondary transmission unit is driven by the primary transmission unit and does not need to be directly driven by an input shaft, and the whole transmission mechanism is simple in structure and small in occupied space.

Description

Transmission mechanism

Technical Field

The utility model relates to the technical field of speed reducers, in particular to a transmission mechanism.

Background

The speed reducer is a speed reduction power transmission mechanism, the speed reducer is various, the planetary speed reducer is a common one, a planetary gear is arranged in the planetary speed reducer, and the speed ratio transmission of the power mechanism and the executing mechanism is realized through the meshing transmission of a sun gear and a planetary gear. However, when equipment needs different rotating speeds, the traditional planetary gear reducer has single rotating speed output, the requirement cannot be met, the current planetary gear reducer needs to be replaced, time and labor are wasted in the process, and the working efficiency is seriously influenced.

In addition, the prior art also has a dual-output transmission device, and the two symmetrical speed reducing mechanisms are used for reducing speed and outputting, so that the two speed reducers are still simply superposed, and the speed reducer is high in cost and large in occupied space. Therefore, the traditional reducer capable of bidirectional output is equivalent to the superposition of two one-way output reducers, and the occupied space is larger.

SUMMERY OF THE UTILITY MODEL

Therefore, a transmission mechanism is needed to solve the problem that the traditional bidirectional output speed reducer occupies a large space.

A transmission mechanism, the transmission mechanism comprising:

a drive shaft;

the input unit comprises an input shaft and a transmission disc, the transmission disc is rotatably sleeved on the transmission shaft, the input shaft is in transmission connection with the transmission disc, and the transmission disc rotates around the transmission shaft under the action of the input shaft;

the primary transmission unit is positioned on one axial side of the transmission disc and is in transmission connection with the transmission disc; and

the secondary transmission unit is positioned on the other axial side of the transmission disc and is in transmission connection with the primary transmission unit;

the primary transmission unit is driven by the transmission disc to output motion rotating around the transmission shaft axially at a first rotating speed, and the secondary transmission unit is driven by the primary transmission unit to output motion rotating around the transmission shaft axially at a second rotating speed.

Among the above-mentioned drive mechanism, when the input shaft was rotatory under drive mechanism's drive, can drive the transmission dish and rotate around the transmission shaft, and then drive the motion of one-level transmission unit through the transmission dish, export the motion around transmission shaft axial rotation with first rotational speed in one side of transmission dish axial. And then, the primary transmission unit can further drive the secondary transmission unit to output the motion which rotates around the transmission shaft at the second rotating speed at the other axial end of the transmission disc. Therefore, the transmission mechanism can respectively output rotary motion at two opposite axial sides of the transmission disc, so that bidirectional output is realized, and two driving mechanisms are replaced. When the equipment needs different transmission ratios, the selection can be carried out from two transmission ratios provided by the primary transmission unit and the secondary transmission unit, and a new driving mechanism does not need to be replaced and assembled. Meanwhile, the secondary transmission unit is driven by the primary transmission unit, the secondary transmission unit is not required to be directly driven by an input shaft, and the whole transmission mechanism is simple in structure and small in occupied space.

In one embodiment, the first rotational speed and the second rotational speed are different in magnitude.

In one embodiment, the primary transmission unit includes a first output member mounted on the transmission shaft, and a first transmission assembly drivingly connected between the transmission disc and the first output member, wherein the first transmission assembly drives the first output member to rotate around the axial direction of the transmission shaft at the first rotation speed under the action of the transmission disc.

In one embodiment, the first transmission assembly includes a first planetary gear rotatably mounted on an axial end surface of the transmission disc and a first ring gear sleeved outside the first planetary gear and the first output member, the first planetary gear is engaged between the first ring gear and the first output member;

the first planetary gear is driven by the transmission disc to rotate along the circumferential direction of the first gear ring, and simultaneously the first planetary gear rotates around the axial direction of the first planetary gear to drive the first output piece to rotate around the axial direction of the transmission shaft.

In one embodiment, the first output member includes a transmission end and an output end, the transmission end is in mesh transmission with the first planetary gear, and the output end is arranged on the side, opposite to the transmission disc, of the transmission end.

In one embodiment, the two-stage transmission unit comprises a second transmission assembly and a second output member, the second transmission assembly is in transmission connection between the first output member and the second output member, and the second transmission assembly drives the second output member to rotate around the axial direction of the transmission shaft at the second rotating speed under the action of the first output member.

In one embodiment, the second transmission assembly comprises a second planetary gear, a sun gear and a second gear ring, the sun gear is sleeved on the transmission shaft and rotates synchronously with the first output member, the second gear ring is sleeved outside the sun gear and the second planetary gear, the second planetary gear is meshed between the sun gear and the second gear ring, and the second output member is assembled on the second planetary gear;

the second planetary gear rotates around the circumferential direction of the second gear ring under the action of the sun gear and drives the second output piece to rotate synchronously.

In one embodiment, the transmission shaft has a first end and a second end opposite to each other in the axial direction, the first end is located at the end where the primary transmission unit is disposed, the second end is located at the end where the secondary transmission unit is disposed, the first output member is disposed at the first end in a rotation stopping manner, and the sun gear is disposed at the second end in a rotation stopping manner.

In one embodiment, the number of the second planetary gears is at least two, each of the second planetary gears is meshed between the sun gear and the second ring gear, and the second output member is sleeved on at least two of the second planetary gears.

In one embodiment, the second output member includes a connecting portion and a second output gear, the connecting portion is coupled to at least two of the second planetary gears, and the second output gear is disposed on a side of the connecting portion facing away from the second planetary gears.

Drawings

FIG. 1 is a schematic structural diagram of a transmission mechanism according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of the transmission mechanism of FIG. 1;

fig. 3 is an exploded view of the transmission mechanism shown in fig. 1.

100. A transmission mechanism; 10. a drive shaft; 12. a first end; 14. a second end; 30. an input unit; 32. An input shaft; 34. a drive plate; 35. a first pin shaft; 50. a primary transmission unit; 52. a first output member; 521. a transmission end; 523. an output end; 54. a first transmission assembly; 541. a first planetary gear; 543. a first ring gear; 70. a secondary transmission unit; 72. a second transmission assembly; 721. a second planetary gear; 723. a sun gear; 725. a second ring gear; 74. a second output member; 741. a connecting portion; 743. a second output gear.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1-3, in one embodiment of the present invention, a transmission mechanism 100 is provided, which can be connected to a power output device such as a motor for power conversion and transmission.

The transmission mechanism 100 comprises a transmission shaft 10, an input unit 30, a primary transmission unit 50 and a secondary transmission unit 70, wherein the input unit 30 comprises an input shaft 32 and a transmission disc 34, the transmission disc 34 is rotatably sleeved on the transmission shaft 10, the input shaft 32 is in transmission connection with the transmission disc 34, and the transmission disc 34 rotates around the transmission shaft 10 under the action of the input shaft 32; the primary transmission unit 50 is arranged at one axial end of the transmission disc 34 and is in transmission connection with the transmission disc 34; the secondary transmission unit 70 is positioned at the other axial side of the transmission disc 34 and is in transmission connection with the primary transmission unit 50; wherein, the primary transmission unit 50 is driven by the transmission disc 34 to output a motion of rotating around the transmission shaft 10 at a first rotation speed, and the secondary transmission unit 70 is driven by the primary transmission unit 50 to output a motion of rotating around the transmission shaft 10 at a second rotation speed.

When the input shaft 32 is driven by the driving mechanism to rotate, the driving disc 34 can be driven to rotate around the transmission shaft 10, and then the driving disc 34 drives the primary transmission unit 50 to move, so that the axial rotation around the transmission shaft 10 at the first rotation speed is output at one axial side of the driving disc 34. Then, the secondary transmission unit 70 can be further driven by the primary transmission unit 50 to output a motion of rotating around the transmission shaft 10 at the second rotation speed at the other axial end of the transmission disc 34. In this way, the transmission mechanism 100 can output rotational motion at two opposite sides of the transmission disc 34 in the axial direction, respectively, to realize bidirectional output, instead of two driving mechanisms. When the apparatus requires a different transmission ratio, it is possible to select from the two ratios provided by the primary transmission unit 50 and the secondary transmission unit 70 without having to replace and assemble a new drive mechanism. Meanwhile, the secondary transmission unit 70 is driven by the primary transmission unit 50, and the secondary transmission unit 70 does not need to be directly driven by the input shaft 32, so that the whole transmission mechanism 100 is simple in structure and small in occupied space.

Alternatively, the input unit 30 is a worm gear assembly, the input shaft 32 is a worm gear, and the driving plate 34 is a worm gear, and the worm gear can rotate around the driving shaft 10 when the worm gear is driven to rotate by the driving piece. Moreover, by adopting the worm and gear assembly as the input unit 30, the driving part matched with the worm can be correspondingly arranged near the plane where the worm and gear is located, the driving part is matched with the middle area of the transmission mechanism 100, the driving part cannot deviate from the middle area of the transmission mechanism 100, the assembly of the driving part is convenient, and the layout of each mechanism is more convenient.

In some embodiments, the magnitude of the first rotational speed and the magnitude of the second rotational speed are different. For example, if the gear ratio of the secondary transmission unit 70 to the primary transmission unit 50 is less than 1, the second rotational speed is less than the first rotational speed; if the transmission ratio of the secondary transmission unit 70 to the primary transmission unit 50 is greater than 1, the second rotational speed is greater than the first rotational speed. Equivalently, the transmission mechanism 100 can output two rotary motions with different rotation speeds at two axially opposite sides of the transmission shaft 10, and when the rotation speed requirement of the system changes, only one of the first-stage transmission unit 50 and the second-stage transmission unit 70 needs to be switched to be in transmission connection with a subsequent action mechanism, so that switching of different transmission ratios can be realized.

For example, the transmission mechanism 100 is a speed reducer, the second rotation speed is smaller than the first rotation speed, and after the first-stage transmission unit 50 performs the first-stage speed reduction on the rotation speed of the driving member to output the first rotation speed, the second rotation speed is outputted by performing the second-stage speed reduction on the second-stage transmission unit 70 in transmission connection with the first-stage transmission unit 50.

In addition, when some equipment needs to be driven at two different rotating speeds, the primary transmission unit 50 and the secondary transmission unit 70 can be driven, and meanwhile, the speed difference between the two ends can be accurately controlled by reasonably setting the transmission ratio between the primary transmission unit 50 and the secondary transmission unit 70. For example, the motion logic of some products is that two motion parts need to move quickly and slowly at first, and after moving to a specified time, the slow end or the fast end needs to stop and the other end continues to move, and the drive mechanism 100 can be used to drive the motion process.

In some embodiments, the primary transmission unit 50 includes a first output member 52 and a first transmission assembly 54, the first output member 52 is mounted on the transmission shaft 10, the first transmission assembly 54 is drivingly connected between the transmission disc 34 and the first output member 52, and the first transmission assembly 54 drives the first output member 52 to rotate around the axial direction of the transmission shaft 10 at a first rotation speed under the action of the transmission disc 34. When the transmission disc 34 rotates, the first transmission assembly 54 is driven to move, and the first output member 52 is driven to rotate around the axial direction of the transmission shaft 10 at the first rotation speed, and the movement rotating around the axial direction of the transmission shaft 10 at the first rotation speed is output through the first output member 52.

Further, the first transmission assembly 54 includes a first planet gear 541 and a first ring gear 543, the first planet gear 541 is rotatably assembled on the axial end surface of the transmission disc 34, the first ring gear 543 is sleeved outside the first planet gear and the first output member 52, and the first planet gear 541 is engaged between the first ring gear 543 and the first output member 52; the first planetary gear 541 is driven by the transmission disc 34 to rotate along the circumferential direction of the first ring gear 543, and the first planetary gear 541 rotates around its own axial direction to drive the first output member 52 to rotate around the axial direction of the transmission shaft 10. The first transmission assembly 54 is a planetary gear set, and the first planetary gear is driven by the transmission disc 34 to rotate around the circumferential direction of the first ring gear 543, so as to drive the first output member 52 to rotate around the axial direction of the transmission shaft 10 at the first speed. It can be understood that the first ring gear 543, the transmission shaft 10, the transmission plate 34 and the first output member 52 are coaxially disposed, and the first ring gear 543 is fixedly disposed, so that the first planetary mechanism can rotate around the fixedly disposed first ring gear 543 when driven by the transmission plate 34.

Optionally, a first pin shaft 35 is disposed on an axial end surface of the transmission disc 34, and the first planetary gear 541 is rotatably sleeved on the first pin shaft 35. The transmission disc 34 drives the first planetary gear 541 to revolve around the axial direction of the transmission shaft 10 through the first pin 35, and simultaneously the first planetary gear 541 rotates around the first pin 35, thereby driving the first output member 52 to rotate around the axial direction of the transmission shaft 10.

Specifically, the first output element 52 includes a transmission end 521 and an output end 523 connected to each other, the transmission end 521 is in transmission with the inner core of the first planetary gear 541, and the output end 523 is disposed on a side of the transmission end 521 facing away from the transmission disc 34 and is configured to be coupled to a subsequent actuating mechanism. When the transmission end 521 rotates around the axial direction of the transmission shaft 10 under the driving of the first planetary gear 541, the output end 523 and the transmission end 521 rotate synchronously to output a rotary motion. Optionally, the transmission end 521 is integrally formed with the output end 523 to facilitate assembly and torque transfer.

In some embodiments, the two-stage transmission unit 70 includes a second transmission assembly 72 and a second output member 74, the second transmission assembly 72 is drivingly connected between the first output member 52 and the second output member 74, and the second transmission assembly 72 drives the second output member 74 to rotate around the axial direction of the transmission shaft 10 at a second rotation speed under the action of the first output member 52. The secondary transmission unit 70 is located on a side of the transmission disc 34 opposite to the primary transmission unit 50, and the second transmission assembly 72 is driven by the first output member 52 to move, so as to drive the second output member 74 to rotate around the axial direction of the transmission shaft 10 at a second rotation speed. In this way, the rotary motion can be output via the first output element 52 of the primary transmission unit 50 and the second output element 74 of the secondary transmission unit 70, so that the transmission 100 can output in both directions.

Further, the second transmission assembly 72 includes a second planetary gear 721, a sun gear 723 and a second ring gear 725, the sun gear 723 is sleeved on the transmission shaft 10 and rotates synchronously with the first output member 52, the second ring gear 725 is sleeved outside the sun gear and the second planetary gear 721, the second planetary gear 721 is meshed between the sun gear 723 and the second ring gear 725, and the second output member 74 is assembled on the second planetary gear 721; the second planetary gear 721 rotates around the second ring gear 725 in the circumferential direction under the action of the sun gear 723, and drives the second output member 74 to rotate synchronously. When the first output element 52 rotates around the axial direction of the transmission shaft 10, the sun gear 723 is synchronously driven to rotate around the axial direction of the transmission shaft 10, then the second planetary gears 721 are driven to rotate around the circumferential direction of the second gear ring 725, and the second output element 74 arranged on the second planetary gears 721 is further driven to synchronously rotate around the circumferential direction of the second gear ring 725, the second gear ring 725 is sleeved outside the sun gear 723 of the transmission shaft 10, the second gear ring 725 is coaxially arranged with the transmission shaft 10, and the second output element 74 can be driven to rotate around the axial direction of the transmission shaft 10 through the rotation of the second planetary gears 721.

Specifically, the transmission shaft 10 has a first end 12 and a second end 14 opposite to each other in the axial direction, the first end 12 is located at an end where the primary transmission unit 50 is disposed, the second end 14 is located at an end where the secondary transmission unit 70 is disposed, the first output member 52 is rotatably sleeved at the first end 12, and the sun gear 723 is rotatably sleeved at the second end 14. Equivalently, the first output member 52 is in rotation-stop fit with the first end 12, and does not move relatively, the first end 12 and the first output member 52 rotate synchronously, so as to drive the second end 14 and the sun gear 723 in rotation-stop fit with the second end 14 to rotate synchronously, and thus the first output member 52 drives the sun gear 723 to rotate synchronously through the transmission shaft 10, so as to drive the secondary transmission unit 70 to move.

In some embodiments, the number of the second planetary gears 721 is at least two, each of the second planetary gears 721 is meshed between the sun gear 723 and the second ring gear 725, the second output element 74 is sleeved on at least two of the second planetary gears 721, so as to support the second output element 74 through at least two of the second planetary gears 721, and the at least two of the second planetary gears 721 rotating synchronously drives the second output element 74 to rotate along the circumferential direction of the second ring gear 725, i.e. rotate around the axial direction of the transmission shaft 10.

Specifically, the second output member 74 includes a connection portion 741 and a second output gear 743, the connection portion 741 is coupled to at least two second planetary gears 721, and the second output gear 743 is disposed on a side of the connection portion 741 facing away from the second planetary gears 721 to connect the second output gear 743 with the second planetary gears 721 through the connection portion 741, so that the second output gear 743 rotates together with the second planetary gears 721 in the axial direction of the propeller shaft 10.

The second output gear 743 is disposed coaxially with the transmission shaft 10, and when the second planetary gear 721 drives the connection portion 741 to rotate around the axial direction of the transmission shaft 10, the second output gear 743 can be driven to rotate around the axial direction of the transmission shaft 10. Optionally, the connecting portion 741 is at least two second pins, each second pin is sleeved on one of the second planetary gears 721, each second planetary gear 721 can rotate around the second pin assembled therewith, and each second planetary gear 721 revolves around the axial direction of the transmission shaft 10, so as to drive at least two second pins and the second output gear 743 to revolve around the axial direction of the transmission shaft 10.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A transmission mechanism, characterized in that it comprises:

a drive shaft;

2. The transmission mechanism as recited in claim 1, wherein the magnitude of the first rotational speed and the magnitude of the second rotational speed are different.

3. The transmission mechanism according to claim 1 or 2, wherein the primary transmission unit includes a first output member and a first transmission assembly, the first output member is mounted on the transmission shaft, the first transmission assembly is drivingly connected between the transmission disc and the first output member, and the first transmission assembly drives the first output member to rotate around the axial direction of the transmission shaft at the first rotation speed under the action of the transmission disc.

4. The transmission mechanism as recited in claim 3, wherein the first transmission assembly includes a first planetary gear rotatably mounted on an axial end surface of the transmission disc and a first ring gear disposed outside the first planetary gear and the first output member, the first planetary gear being engaged between the first ring gear and the first output member;

5. The transmission mechanism as claimed in claim 4, wherein the first output member includes a transmission end and an output end connected to each other, the transmission end is in mesh transmission with the first planetary gear, and the output end is provided on a side of the transmission end facing away from the transmission disc.

6. The transmission mechanism as recited in claim 3, wherein the two-stage transmission unit includes a second transmission assembly and a second output member, the second transmission assembly is drivingly connected between the first output member and the second output member, and the second transmission assembly drives the second output member to rotate around the axial direction of the transmission shaft at the second rotation speed under the action of the first output member.

7. The transmission mechanism as claimed in claim 6, wherein the second transmission assembly includes a second planetary gear, a sun gear and a second ring gear, the sun gear is sleeved on the transmission shaft and rotates synchronously with the first output member, the second ring gear is sleeved outside the sun gear and the second planetary gear, the second planetary gear is meshed between the sun gear and the second ring gear, and the second output member is assembled on the second planetary gear;

8. The transmission mechanism as claimed in claim 7, wherein the transmission shaft has a first end and a second end opposite to each other in the axial direction, the first end is located at the end where the primary transmission unit is located, the second end is located at the end where the secondary transmission unit is located, the first output member is disposed at the first end, and the sun gear is disposed at the second end.

9. The transmission mechanism as claimed in claim 7, wherein the number of the second planetary gears is at least two, each of the second planetary gears is engaged between the sun gear and the second ring gear, and the second output member is sleeved on at least two of the second planetary gears.

10. The transmission mechanism as recited in claim 9, wherein the second output member includes a connecting portion and a second output gear, the connecting portion being coupled to at least two of the second planetary gears, the second output gear being disposed on a side of the connecting portion facing away from the second planetary gears.