TWI553244B - Hollow planetary reducer - Google Patents

Description

Hollow planetary reducer

The invention relates to a reducer, and more particularly to a hollow planetary reducer.

In the industrial field, in order to amplify the output torque and improve the output accuracy, various types of reducers are used, among which the planetary reducer is the most common type, and its development technology is mature, the quality is stable, and the harmony is Compared with the reducer, the production cost is low and the transmission efficiency is high, so it is widely used in various industrial machines.

However, in the application field of precision machinery, the products require light weight and volume reduction. However, various wires connecting the motor, such as wires and air pipes, are also indispensable components. In the conventional reducer structure, the internal space is not passed. Properly optimized design, these wires must occupy extra space for accommodation, resulting in an increase in the overall size of the reducer, and can not meet the requirements of the precision machinery field.

In view of this, how to improve the above problems is the primary problem to be solved by the present invention.

One of the objects of the present invention is to provide a hollow planetary reducer that utilizes planetary gears to assist in the operation of the speed reduction mechanism, thereby reducing the energy consumption at the motor input.

The second object of the present invention is to provide a hollow accommodating space for accommodating various wires in the reducer, thereby optimizing the space configuration in the reducer. In turn, the overall volume of the reducer is reduced.

In order to achieve the above objective, the present invention provides a hollow planetary reducer having a body, the body being provided with at least two driving gears, each driving gear being driven by a power input source; each driving gear is respectively connected with a transmission gear, and each The transmission gears are respectively connected to a first gear; a hollow tubular member is disposed in the body, and the hollow tubular member has an accommodating space for accommodating the wire.

Wherein, the body is further provided with a second gear and a sun gear disposed along the same axis of the first gear, wherein the second gear is an internal gear; the sun gear is connected to the first gear by a connecting member, The sun gear is located inside the second gear and is in the same plane as the second gear; the sun gear is connected with at least two planetary gears, and each of the planetary gears is respectively connected to the second gear, wherein the second gear The main body is fixed to the main body, so that the planetary gears are driven by the sun gear to generate the action of bypassing the sun gear; and the planetary gears are disposed in an output member to drive the output member to rotate synchronously.

In an embodiment, the first gear is an internal gear.

In another embodiment, the first gear is an external gear.

Preferably, the driving gear has a plurality of, and the power input source comprises a plurality of motors corresponding to the number of driving gears, and each of the motors is respectively connected to a driving gear and driven. On the other hand, the sun gear is connected to a plurality of planetary gears.

Preferably, the connecting member has a connecting portion extending along the axis, and the hollow tubular member extends through the connecting portion.

The above objects and advantages of the present invention will be readily understood from the following detailed description of the embodiments of the invention.

1‧‧‧ Ontology

11‧‧‧ axis

2‧‧‧First-stage speed reduction mechanism

21, 21B‧‧‧ first gear

22‧‧‧ drive gear

23‧‧‧Transmission gear

3‧‧‧2nd speed reduction mechanism

31‧‧‧second gear

32‧‧‧Sun Gear

33‧‧‧ planetary gear

4‧‧‧Power input source

41‧‧‧Motor

42‧‧‧ drive shaft

5‧‧‧Connecting parts

51‧‧‧Connecting Department

6‧‧‧ Outputs

61‧‧‧Fixed parts

7‧‧‧ hollow pipe fittings

71‧‧‧ accommodating space

Figures 1, 2, 3, 4, and 5 are partial exploded views of the present invention; and Figure 6 is a schematic cross-sectional view of the present invention.

Please refer to FIG. 1 to FIG. 6 , which is a hollow planetary reducer provided by the present invention, which has a body 1 , and the body 1 is provided with a first gear 21 disposed along the same axis 11 . The second gear 31 and the sun gear 32, wherein the first gear 21 and the second gear 31 are respectively located at two sides of the body 1, and define a first speed reduction mechanism 2 and a secondary speed reduction mechanism 3.

The second gear 31 described above is an internal gear. In detail, the second gear 31 is an annular structure and has teeth on its inner side surface. Accordingly, the second gear 31 is engaged by the other gears on the inner side thereof.

As shown in FIG. 1 and FIG. 2 together with FIG. 6, in the embodiment, the first gear 21 is an internal gear, and in the primary reduction mechanism 2, at least two driving are provided on the inner side of the first gear 21. Gear 22, wherein each drive gear 22 is driven by a power input source 4. In the embodiment, the power input source 4 includes four motors 41. The four motors 41 are coupled to a module and respectively protrude from a driving shaft 42. On the other hand, the inner side of the first gear 21 Four drive gears 22 are provided, and one drive shaft 42 is respectively connected, thereby driving each drive gear 22 to rotate. Each of the driving gears 22 is respectively connected with a transmission gear 23, and each of the transmission gears 23 Connected to the first gear 21, wherein the transmission gear 23 and the first gear 21 are respectively pivoted to the body 1, whereby when the motor 41 drives the drive gear 22 to rotate, the drive gear 23 transmits through the transmission gear 23 The first gear 21 rotates with it. In this embodiment, the number of teeth of the driving gear 22 is less than the number of teeth of the transmission gear 23, and the number of teeth of the transmission gear 23 is also less than the number of teeth of the first gear 21. Therefore, the output speed of the motor 41 is here. Get two decelerations.

As described above, in the first-stage speed reduction mechanism 2, the four motors 41 are simultaneously driven, and the rotation torque of each of the motors 41 during rotation can be reduced as compared with the conventionally used motor-driven speed reducer, thereby reducing the start-up. Energy consumption during operation and operation. On the other hand, the transmission gear 23 having the number of teeth between the driving gear 22 and the first gear 21 is disposed between the two, so that the driving gear 22 can drive the transmission gear 23 with a lower rotational torque. Compared with the driving gear 22 directly driving the first gear 21, the effect of reducing energy consumption can be achieved.

However, in the other embodiment, the first gear described above may also form a structural form of the external gear as shown in FIG. As shown in the figure, the first gear 21B is provided with a tooth portion on the outer peripheral side thereof, and is meshed with the other gears on the outer peripheral side thereof, and is also capable of achieving the effect of the first-stage speed reduction mechanism 2.

In the second stage speed reduction mechanism 3, the sun gear 32 is located inside the second gear 31 and is disposed on the same plane as the second gear 31; Referring to Fig. 2, the sun gear 32 is coupled to the first gear 21 by a connecting member 5, thereby being integrally coupled to the first gear 21 for synchronous rotation. In this embodiment, the The connecting member 5 has a connecting portion 51 extending along the axis 11, and one end of the connecting portion 51 is expanded and connected to the first gear 21. The sun gear 32 is connected to at least two planetary gears 33 as shown in FIGS. 4 and 5. In the present embodiment, the number of the planetary gears 33 is four, and the planetary gears 33 are respectively connected to the second gear. 31. The second gear 31 is fixed to the main body 1. Since it is in a state of being fixed, the planetary gears 33 are driven by the sun gear 32 to generate an action of bypassing the sun gear 32. The planetary gears 33 are disposed in an output member 6. In particular, the shafts of the planetary gears 33 are bored by a fixing member 61 and fixed in the output member 6, whereby when the planetary gears 33 are When the rotation of the sun gear 32 is generated as described above, the output member 6 is synchronously driven to rotate; and the output member 6 can be connected to an external device (not shown) to form an output end. The external device rotates.

In the operation of the secondary reduction mechanism 3, as shown in FIG. 6, since the sun gear 32 is coaxially coupled to the first gear 21, the rotational speed thereof is equal to that of the first gear 21, that is, the primary reduction mechanism 2 Slow down the result. Then, by the arrangement of the planetary gears 33, the rotational speed is again lowered, that is, the rotational speed of the planetary gear 33 around the sun gear 32 is lower than the rotational speed of the sun gear 32. In summary, finally, the rotational speed of the output member 6 is less than the rotational speed outputted by the motor 41 by the first-stage reduction mechanism 2 and the secondary reduction mechanism 3.

In addition, a hollow tube member 7 is disposed in the body 1 of the reducer, and has an accommodating space 71 therein for accommodating wires, such as wires and air pipes. In this embodiment, the hollow tubular member 7 is disposed at the connection of the connecting member 5 In the joint portion 51, the extending direction thereof also overlaps the axis 11. Providing the hollow pipe member 7 to accommodate the wire therein has the effect of optimizing the internal space configuration of the reducer, and can effectively reduce the overall occupation volume of the reducer to achieve the purpose of miniaturization of the product.

The disclosure of the above embodiments is intended to be illustrative of the invention and is not intended to limit the invention.

In summary, it will be apparent to those skilled in the art that the present invention can achieve the foregoing objectives and is in accordance with the provisions of the Patent Law.

1‧‧‧ Ontology

11‧‧‧ axis

2‧‧‧First-stage speed reduction mechanism

21‧‧‧First gear

22‧‧‧ drive gear

23‧‧‧Transmission gear

3‧‧‧2nd speed reduction mechanism

31‧‧‧second gear

32‧‧‧Sun Gear

33‧‧‧ planetary gear

4‧‧‧Power input source

42‧‧‧ drive shaft

5‧‧‧Connecting parts

51‧‧‧Connecting Department

6‧‧‧ Outputs

61‧‧‧Fixed parts

7‧‧‧ hollow pipe fittings

71‧‧‧ accommodating space

Claims (7)

A hollow planetary reducer having a body defining a virtual axis; the body is provided with at least two driving gears, each driving gear is driven by a power input source; each driving gear is respectively connected with a transmission gear, and Each of the transmission gears is respectively connected to a first gear, and each of the driving gears is not connected to the first gear; a hollow tubular member is disposed in the body along the axis, wherein the hollow tubular member passes through the first gear, and each driving gear And each of the transmission gears is distributed around the hollow tubular member; the hollow tubular member has an accommodating space for accommodating the wire. The hollow planetary reducer of claim 1, wherein the body is further provided with a second gear and a sun gear disposed along the same axis as the first gear, wherein the second gear is an internal gear; The sun gear is coupled to the first gear by a connecting member, and the sun gear is passed by the hollow pipe and located inside the second gear and in the same plane as the second gear; the sun gear is connected with at least two Planetary gears, wherein each of the planetary gears is distributed around the hollow tubular member and is coupled to the second gear, and the sun gear is not coupled to the second gear; wherein the second gear is fixed to the body, thereby Each of the planet gears is driven by the sun gear to generate an action of bypassing the sun gear; and each of the planet gears is pivotally disposed in an output member, and the output member rotates synchronously. The hollow planetary reducer of claim 2, wherein the sun gear is connected to four planetary gears. The hollow planetary reducer of claim 2, wherein the connecting member has a connecting portion extending along the axis, and the hollow tubular member extends through the connecting portion. The hollow planetary reducer of claim 1, wherein the first gear is an internal gear. The hollow planetary reducer of claim 1, wherein the first gear is an external gear. The hollow planetary reducer of claim 1, wherein the number of teeth of the drive gear is less than the number of teeth of the transmission gear.