TW201700348A - Transmission assembly - Google Patents

Abstract

A transmission assembly includes a stationary member, a movable member, a link member, and a drive member. The fixing member is for fixing to the frame. The movable member is used for the chain guiding member to be combined. The first link of the link member is pivotally disposed at one of the fixed members at a first pivot and at one of the movable members at a second pivot. The second link of the link member is pivotally disposed at another position of the fixed member at a third pivot, and is pivoted to the other of the movable member at a fourth pivot. A plane is formed between the extension lines of the axes of the second pivot and the fourth pivot. The body of the drive member is located on a side of the plane facing the fixed member. The torsion output shaft of the driving member protrudes from the body toward the plane, and an extension line of the axis passes through the plane, and is connected to the second pivot or the fourth pivot to be a transmission shaft to drive the movable member.

Description

Transmission assembly

The present invention relates to a transmission assembly, and more particularly to a bicycle transmission assembly.

In recent years, the bicycle market has flourished, and both high-end bicycles of competition type and mass-type bicycles for leisure and entertainment have been favored by consumers. In general, the bicycle is often equipped with a transmission so that the bicycle can move the chain to different chainrings depending on the terrain and user needs. The transmission includes a front derailleur and a rear derailleur, wherein the rear derailleur is disposed on the frame of the bicycle to control the position of the chain on the chain ring. Bicycles can be used with different rear derailleurs depending on the frame structure or shifting line. In addition to the mechanical transmission, many bicycles are gradually adopting electronic transmissions.

The electronic transmission uses a motor as a power source. Since the parts on the bicycle are light and small, the motors used in the electronic transmission are small motors. However, small motors have less torque and are difficult to drive external mechanisms. Therefore, it is necessary to amplify the output torque through a speed reduction mechanism such as a gear train. However, the conventional speed reduction mechanism often cannot combine the characteristics of high reduction ratio, light weight and small size. The electronic transmission adopts a small size and light weight small motor, but the size and weight of the speed reduction mechanism cannot be reduced. The electronic transmission is still not compact.

Therefore, how to further miniaturize the electronic transmission is one of the problems that developers should start with.

The present invention is directed to a transmission assembly for further miniaturizing an electronic transmission.

The transmission assembly disclosed in the present invention comprises a fixing member, a movable member, a link member and a driving member. The fixing member is fixed to a frame. The movable member is used to join a chain guiding member. The link member includes a first link and a second link. The first link is pivotally disposed at one of the fixing members with a first pivot and is pivotally disposed at one of the movable members by a second pivot. The second link is pivoted to the other side of the fixed member by a third pivot, and is pivoted to the other of the movable members by a fourth pivot. A plane is formed between the extension line of the axis of the second pivot and the extension line of the axis of the fourth pivot. The drive member includes a torsion output shaft and a body. The body is located on a side of the plane facing the fixing member. The torsion output shaft projects from the body toward the plane, and the extension line of the axis of the torsion output shaft passes through the plane. The torque output shaft is coupled to the second pivot or the fourth pivot to be a drive shaft to move the movable member relative to the fixed member.

According to the transmission assembly disclosed in the above embodiment, the transmission driving member is located on one side of the plane toward the fixing member, and the torsion output shaft protrudes from the body toward the plane and the extension line of the axial center of the torsion output shaft passes through the plane, so that the transmission can be easily performed. The transmission assembly is assembled and the volume of the transmission assembly can be reduced. Therefore, the transmission assembly can be miniaturized to meet the needs of bicycle parts.

The above description of the present invention and the following description of the embodiments are intended to illustrate and explain the principles of the invention, and to provide a further explanation of the scope of the invention.

Please refer to Figure 1 to Figure 3B. 1 is a partial plan view of a transmission assembly according to a first embodiment of the present invention coupled to a frame. 2 is a perspective view of the transmission assembly of FIG. 1. 3A is an exploded perspective view of FIG. 2. 3B is a perspective view of the decelerating member and the driving member of FIG. 3A.

As shown in Figure 1, the transmission assembly 10 of the present embodiment can be used in a rear derailleur of a bicycle. The transmission assembly 10 is fixed to a frame 20 and is coupled by a chain guide member 30.

In detail, as shown in FIGS. 1 to 3A, the transmission assembly 10 includes a fixing member 100, a movable member 200, a link member 300, a first pivot 400a, a second pivot 400b, and a third pivot. 400c and a fourth pivot 400d, a deceleration member 500 and a driving member 600. The fixing member 100 is for fixing to the frame 20 . The movable member 200 is movable relative to the fixed member 100 and is coupled to a chain guiding member 30. The link member 300 includes a first link 310 and a second link 320. The opposite ends of the first link 310 and the second link 320 are pivotally disposed on the fixed member 100 and the movable member 200 through the first pivot 400a, the second pivot 400b, the third pivot 400c, and the fourth pivot 400d. Moreover, in the present embodiment, when the first pivot 400a is rotated, the first pivot 400a can drive the first link 310, the second link 320, and the movable member 200 to swing relative to the fixed member 100.

As shown in FIG. 3A and FIG. 3B, the structure of the decelerating member 500 is similar to a harmonic reducer (Harmonic Drive), which includes a rigid inner ring 510 (Circular Spline), a flexible outer toothed cup 520 (Flexspline) and a Waveform generator 530 (Wave Generator). The rigid inner ring gear 510 is fixed to the fixing member 100. The rigid inner ring gear 510 is an annular body and has a plurality of annularly arranged internal teeth on its inner wall surface. The flexible outer tooth cup 520 is disposed within the rigid inner ring gear 510. The flexible outer tooth cup 520 is a cup shape, and the outer side surface of the flexible outer tooth cup 520 has a plurality of outer teeth arranged in a ring shape. The outer teeth of the flexible outer tooth cup 520 correspond to the inner teeth of the rigid inner ring gear 510, and the number of teeth of the outer teeth of the flexible outer tooth cup 520 is less than the number of teeth of the inner teeth of the rigid inner ring gear 510. The waveform generator 530 is rotatably disposed within the flexible outer tooth cup 520.

The operation principle of the decelerating member 500 is that when the waveform generator 530 rotates, the flexible outer tooth cup 520 is deformed to partially mesh with the rigid inner ring gear 510, and the flexible outer tooth cup 520 is driven by the difference in the number of teeth between the outer teeth and the inner teeth. The waveform generator 530 is rotated in a reduction ratio relationship.

In addition, the flexible outer cup 520 has a first torque output shaft 521. The first torque output shaft 521 is coupled to the first pivot 400a through a transmission member 700 to oscillate the first link 310 and the second link 320 through the first pivot 400a. In detail, the transmission member 700 of the present embodiment includes a worm 710 and a worm gear 720 that are engaged. The worm 710 is coaxially fixed to the first torsion output shaft 521. The worm wheel 720 is coaxially fixed to the first pivot 400a that engages the fixed member 100 and the first link 310. In this way, when the first torsion output shaft 521 rotates, the first link 310 can be swung relative to the fixed member 100 through the transmission member 700 and the first pivot 400a.

In the present embodiment, the transmission member 700 is exemplified by a worm worm gear set. Since the worm worm gear set generally has a self-locking function, that is, the worm worm gear set has a limitation of unidirectional power transmission, that is, the worm 710 can drive the worm gear 720 to rotate. However, the worm wheel 720 cannot drive the worm 710 to rotate. Therefore, when the movable member 200 or the link member 300 is struck by an external force, the worm worm wheel group can effectively block the external force from being transmitted back to the decelerating member 500 without causing the decelerating member 500 to be damaged.

The drive member 600 is, for example, a motor having a second torque output shaft 610. The second torque output shaft 610 is coupled to the waveform generator 530 to drive the waveform generator 530 to rotate.

Both the decelerating member 500 and the transmission member 700 described above can provide a deceleration effect. The reduction ratio that the reduction member 500 can provide is, for example, about 30 to 100, and the reduction ratio that the transmission member 700 can provide is, for example, about 10 to 40. Therefore, in the present embodiment, the combination of the decelerating member 500 and the transmission member 700 can be combined with the effect of a high reduction ratio (for example, a reduction ratio of 1000), so that the torque output of the second torsion output shaft 610 of the driving member 600 is 0.01. At Nm, the torque output of the first fixing shaft 100 and the first pivot 400a of the first link 310 is raised to 10 N-m.

In addition, compared with the conventional gear reducer, if the reduction gearbox is to achieve a high reduction ratio, it is bound to reduce the volume of the reduction gearbox. However, the combination of the rigid inner ring 510, the flexible outer cup 520 and the wave generator 530 of the decelerating member 500 of the present embodiment can simultaneously take into consideration the characteristics of high reduction ratio, small volume, and light weight, so that the same reduction ratio is used. Under the premise, the transmission assembly 10 of the embodiment can be miniaturized to meet the requirements of the parts of the bicycle.

Please refer to Figure 4 and Figure 5. 4 and 5 are schematic views of the operation of the transmission assembly of FIG. 2.

As shown in Figure 4, the movable member 200 of the transmission assembly 10 is in a first use position. Next, as shown in FIG. 5, when the first torsion output shaft 521 of the flexible outer cup 520 is rotated in the direction indicated by the arrow a, the worm 710 fixed to the first torsion output shaft 521 is driven to be fixed to the first pivot. The worm wheel 720 of the shaft 400a rotates in the direction indicated by the arrow b. Next, the worm wheel 720 will rotate the first pivot 400a and the first link 310 in the direction indicated by the arrow b. Then, through the movement of the link member 300, the movable member 200 can be driven to move along a curved path (in the direction indicated by the arrow c) to be in a second use position. As such, the movable member 200 can drive the chain guide member 30 (shown in FIG. 1) relatively close to or away from the frame 20 (as shown in FIG. 1) to achieve the purpose of shifting.

Please refer to Figure 6. Figure 6 is a side elevational view of a transmission assembly in accordance with a second embodiment of the present invention.

In the present embodiment, the transmission assembly 10 further includes an elastic member 750. The elastic member 750 is, for example, a tension spring. The opposite ends of the elastic member 750 are respectively connected to one end of the first link 310 away from the fixing member 100 and the second link 320 is close to one end of the fixing member 100.

The elastic pre-stress of the elastic member 750 can assist the chain guiding member 30 (shown in FIG. 1) to be displaced toward the frame 20 (shown in FIG. 1) to assist the chain to switch from the small tooth to the large tooth, so that The shifting of the transmission assembly 10 is smoother.

Moreover, the resilient preload of the resilient member 750 can position the transmission assembly 10 to reduce the extent to which the riding vibration affects the transmission assembly 10.

In addition, the resilient preload of the resilient member 750 eliminates backlash between the gears of the transmission assembly 10, thereby improving the accuracy and stability of the transmission assembly 10.

In the embodiment of FIG. 1 , the first torsion output shaft 521 of the flexible outer cup 520 is rotated by the worm 710 and the worm wheel 720 to drive the first pivot 400 a of the connecting fixing member 100 and the first link 310 , but Not limited to this. Please refer to Figure 7. Figure 7 is a side elevational view of a transmission assembly in accordance with a third embodiment of the present invention.

As shown in the embodiment of FIG. 7, the first torsion output shaft 521 of the flexible outer cup 520 can also rotate through the worm 710 and the worm wheel 720 to engage the second pivot 400b of the connecting member 100 and the second link 320. In this way, when the first torsion output shaft 521 is rotated, the second link 320 can be swung relative to the fixed member 100 through the transmission member 700 and the second pivot 400b to simultaneously displace the movable member 200 relative to the fixed member 100.

In the embodiment of FIG. 1 described above, the decelerating member 500 is fixed to the fixing member 100, but is not limited thereto. Please refer to Figure 8. Figure 8 is a side elevational view of a transmission assembly in accordance with a fourth embodiment of the present invention.

In the embodiment of FIG. 8, the decelerating member 500 and the driving member 600 are fixed to the movable member 200, and the worm 710 and the worm wheel 720 are driven to rotate the engaging movable member 200 and the third pivot 400c of the first link 310. In this way, when the first torsion output shaft 521 is rotated, the first link 310 can be swung relative to the fixed member 100 through the transmission member 700 and the third pivot 400c to drive the movable member 200 to be displaced relative to the fixed member 100.

The installation position of the speed reducing member 500 and the driving member 600 is not limited to being disposed on the movable member 200 as in the embodiment of FIG. 8 described above. Please refer to Figure 9. Figure 9 is a side elevational view of a transmission assembly in accordance with a fifth embodiment of the present invention.

As shown in FIG. 9, the decelerating member 500 and the driving member 600 may also be fixed to the first link 310. The first link 310 of the link member 300 is pivotally disposed at one of the fixed members 100 with a first pivot 400a and at one of the movable members 200 with a second pivot 400b. The second link 320 of the link member 300 is pivotally disposed at another position of the fixed member 100 at a third pivot 400c, and is pivoted to the other of the movable member 200 at a fourth pivot 400d. A plane S is formed between the extension line of the axis of the second pivot 400b and the extension line of the axis of the fourth pivot 400d. However, this plane S may not include the extension line itself of the axis of the second pivot 400b and the extension line itself of the axis of the fourth pivot 400d.

As shown in FIGS. 3B and 9 , the drive member 600 includes a second torque output shaft 610 and a body 620 . The body 620 is located on a side of the plane S facing the fixing member 100. In this embodiment, the second torsion output shaft 610 and the body 620 can be substantially within a range surrounded by the first pivot 400a, the second pivot 400b, the third pivot 400c, and the fourth pivot 400d. The term "substantially" as used herein means that the second torsion output shaft 610 and the body 620 may have portions located in the first pivot 400a, the second pivot 400b, the third pivot 400c, and the first portion due to manufacturing or mounting tolerances. The range surrounded by the four pivots 400d is still within the scope of this embodiment. However, the second torsion output shaft 610 and the body 620 may also be located on the first pivot 400a, the second pivot 400b, and the third pivot, as needed, when the body 620 is located on one side of the plane S toward the fixed member 100. The range surrounded by the 400c and the fourth pivot 400d is outside.

In the present embodiment, the second torsion output shaft 610 protrudes from the body 620 toward the plane S, and the extension line L of the axis of the second torsion output shaft 610 passes through the plane S. The second torsion output shaft 610 is coupled to the second pivot 400b to be a transmission shaft to drive the movable member 200 to move relative to the fixed member 100. The second pivot 400b can be fixed to the movable member 200.

As shown in FIGS. 3B and 9 , the speed reducing member 500 includes a rigid inner ring gear 510 , a flexible outer tooth cup 520 , a wave generator 530 , and a first torque output shaft 521 . The rigid inner ring gear 510, the flexible outer tooth cup 520, and the wave generator 530 are substantially located within a range surrounded by the first pivot 400a, the second pivot 400b, the third pivot 400c, and the fourth pivot 400d. The term "substantially" herein means that the rigid inner ring 510, the flexible outer cup 520, and the wave generator 530 may be partially located in the first pivot 400a and the second pivot 400b due to manufacturing or mounting tolerances. The third pivot 400c and the fourth pivot 400d are outside the range, but still fall within the scope of this embodiment.

The flexible outer tooth cup 520 is disposed within the rigid inner ring gear 510. The first torsion output shaft 521 is coupled to the flexible outer tooth cup 520 and passes through the rigid inner ring gear 510. Waveform generator 530 is disposed within flexible outer tooth cup 520. The second torque output shaft 610 is coupled to the waveform generator 530 to drive the waveform generator 530 to rotate. The rigid inner ring gear 510 of the decelerating member 500 may be fixed to the first link 310.

The transmission member 700 includes a worm 710 and a worm gear 720. The worm 710 is coaxially fixed to the first torsion output shaft 521. The worm gear 720 is coaxially fixed to the second pivot 400b and is engaged with the worm 710. The transmission member 700 is configured to engage the first torsion output shaft 521 and the second pivot 400b to drive the movable member 200 to rotate relative to the first link 310 and the second link 320.

With such a configuration, the user can easily mount the driving member 600, the decelerating member 500, and the plane S formed between the extension line of the axis of the second pivot 400b and the extension line of the axis of the fourth pivot 400d. The transmission member 700 pivots the movable member 200 to the first link 310 and the second link 320. Therefore, the assembly complexity of the transmission assembly 10 can be simplified.

Alternatively, in other embodiments (not shown), the decelerating member 500 and the driving member 600 may also be disposed on the second link 320 instead. The second torsion output shaft 610 is coupled to the fourth pivot 400d to be a transmission shaft to drive the movable member 200 to move relative to the fixed member 100. The rigid inner ring gear 510 of the decelerating member 500 may be fixed to the second link 320.

Alternatively, in other embodiments (not shown, but referring to FIG. 6 ), opposite ends of the elastic member 750 are respectively connected to the first link 310 away from one end of the fixing member 100 and the second link 320 is adjacent to the fixing member 100 . One end. The elastic member 750 can be a tension spring.

Please refer to FIG. 10A and FIG. 10B. Figure 10A is a perspective view of a transmission assembly in accordance with a sixth embodiment of the present invention. Figure 10B is a side elevational view of Figure 10A.

This embodiment is similar to the first embodiment in that the transmission assembly 10 does not include the transmission member 700, and the first torsion output shaft 521 is directly coaxially fixed to the first pivot 400a. That is to say, in the present embodiment, the first torsion output shaft 521 and the first pivot 400a are integrally formed. In this way, when the first torsion output shaft 521 rotates, the first link 310 can be directly swung relative to the fixed member 100 to drive the movable member 200 to be displaced relative to the fixed member 100.

In this embodiment, since the first torsion output shaft 521 is directly coaxially fixed to the first pivot 400a, that is, the first torsion output shaft 521 and the first pivot 400a are not connected to each other through the gear box. The backlash can be avoided, so the transmission assembly 10 of the present embodiment can still maintain accuracy and stability without the elastic member 750 (as shown in FIG. 6).

Please refer to Figure 11. Figure 11 is a side elevational view of a transmission assembly in accordance with a seventh embodiment of the present invention.

This embodiment is similar to the embodiment of FIG. 10A except that the first torsion output shaft 521 of the present embodiment is directly coaxially fixed to the third pivot 400c.

Please refer to Figure 12. Figure 12 is a side elevational view of a transmission assembly in accordance with an eighth embodiment of the present invention.

This embodiment is similar to the embodiment of FIG. 10A except that the decelerating member 500 and the driving member 600 of the present embodiment are instead fixed to the movable member 200, and the first torsion output shaft 521 of the flexible outer cup 520 is Directly coaxially fixed to the second pivot 400b.

Please refer to Figure 13. Figure 13 is a side elevational view of a transmission assembly in accordance with a ninth embodiment of the present invention.

This embodiment is similar to the embodiment of FIG. 10A except that the decelerating member 500 and the driving member 600 of the present embodiment are instead fixed to the first link 310. Alternatively, in other embodiments (not shown), the decelerating member 500 and the driving member 600 may also be fixed to the second link 320, and the first torsion output shaft 521 of the flexible outer cup 520 is directly coaxial. The ground is fixed to the third pivot 400c or the fourth pivot 400d.

The transmission member 700 in the embodiment of FIG. 1 is exemplified by the worm gear 720 and the worm 710, but is not limited thereto. Please refer to FIG. 14A and FIG. 14B. Figure 14A is a perspective view of a transmission assembly in accordance with a tenth embodiment of the present invention. Figure 14B is a side elevational view of Figure 14A.

In the present embodiment, the decelerating member 500 and the driving member 600 are fixed to the fixing member 100, and the first torsion output shaft 521 of the flexible outer cup 520 of the decelerating member 500 is transmitted through the transmission member 800 and the first pivot 400a. The link member 300 is driven to swing. In detail, the first link 310 and the second link 320 of the link member 300 are pivotally disposed on the fixing member 100 through the first pivot 400a, the second pivot 400b, the third pivot 400c, and the fourth pivot 400d. And the movable member 200. The transmission member 800 includes a first gear 810 and a second gear 820 that are engaged. The number of teeth of the first gear 810 is less than the number of teeth of the second gear 820, and the first gear 810 is fixed to the first torque output shaft 521, and the second gear 820 is fixed to the first pivot of the connecting fixing member 100 and the first link 310. Axis 400a. In this way, when the first torsion output shaft 521 rotates, the first link 310 can be swung relative to the fixed member 100 through the transmission member 800 and the first pivot 400a.

In addition, since the number of teeth of the first gear 810 is less than the number of teeth of the second gear 820, the transmission member 800 can also provide an additional deceleration effect.

Please refer to Figure 15. Figure 15 is a side elevational view of a transmission assembly in accordance with an eleventh embodiment of the present invention.

This embodiment is similar to the embodiment of FIG. 14A . The difference is that the first torsion output shaft 521 of the flexible outer tooth cup 520 of the present embodiment is driven by the first gear 810 and the second gear 820 to drive the fixing member 100 and the first The third pivot 400c of the two links 320 rotates.

Please refer to Figure 16. Figure 16 is a side elevational view of a transmission assembly in accordance with a twelfth embodiment of the present invention.

The embodiment is similar to the embodiment of FIG. 14A. The difference is that the decelerating member 500 and the driving member 600 of the embodiment are fixed to the movable member 200, and the connecting gear member 200 is driven by the first gear 810 and the second gear 820. The second pivot 400b of the first link 310.

Please refer to Figure 17. Figure 17 is a side elevational view of a transmission assembly in accordance with a thirteenth embodiment of the present invention.

This embodiment is similar to the embodiment of FIG. 14A except that the decelerating member 500 and the driving member 600 of the present embodiment can also be fixed to the first link 310. Alternatively, in other embodiments (not shown), the decelerating member 500 and the driving member 600 may also be fixed to the second link 320 instead.

According to the transmission assembly disclosed in the above embodiment, the combination of the rigid inner ring gear, the flexible outer tooth cup and the wave generator enables the speed reducing member to simultaneously take into consideration the characteristics of high reduction ratio, small volume and light weight. In addition, since the driving member is located on one side of the plane toward the fixed member, and the torsion output shaft protrudes from the body toward the plane and the extension line of the axis of the torsion output shaft passes through the plane, the transmission assembly can be easily assembled and the transmission can be reduced. The volume of the assembly. Therefore, the transmission assembly can be miniaturized to meet the needs of bicycle parts.

Although the embodiments of the present invention are disclosed above, it is not intended to limit the present invention, and those skilled in the art, regardless of the spirit and scope of the present invention, the shapes, configurations, and features described in the scope of the present application. And the number of modifications may be made, and the scope of patent protection of the present invention shall be determined by the scope of the patent application attached to the specification.

10‧‧‧Transmission assembly
20‧‧‧ frame
30‧‧‧Chain guiding member
100‧‧‧Fixed components
200‧‧‧Active components
300‧‧‧Connector components
310‧‧‧First Link
320‧‧‧Second connecting rod
400a‧‧‧first pivot
400b‧‧‧second pivot
400c‧‧‧ third pivot
400d‧‧‧fourth pivot
500‧‧‧Deceleration components
510‧‧‧Rigid internal ring
520‧‧‧Flexible outer tooth cup
521‧‧‧First Torque Output Shaft
530‧‧‧ Waveform Generator
600‧‧‧ drive components
610‧‧‧Second Torque Output Shaft
620‧‧‧ Ontology
700‧‧‧Transmission components
710‧‧‧ worm
720‧‧‧ worm gear
750‧‧‧Flexible parts
800‧‧‧Transmission components
810‧‧‧First gear
820‧‧‧second gear
L‧‧‧ Extension line
S‧‧ plane

1 is a partial plan view of a transmission assembly according to a first embodiment of the present invention coupled to a frame. 2 is a perspective view of the transmission assembly of FIG. 1. 3A is an exploded perspective view of FIG. 2. 3B is a perspective view of the decelerating member and the driving member of FIG. 3A. 4 and 5 are schematic views of the operation of the transmission assembly of FIG. 2. Figure 6 is a side elevational view of a transmission assembly in accordance with a second embodiment of the present invention. Figure 7 is a side elevational view of a transmission assembly in accordance with a third embodiment of the present invention. Figure 8 is a side elevational view of a transmission assembly in accordance with a fourth embodiment of the present invention. Figure 9 is a side elevational view of a transmission assembly in accordance with a fifth embodiment of the present invention. Figure 10A is a perspective view of a transmission assembly in accordance with a sixth embodiment of the present invention. Figure 10B is a side elevational view of Figure 10A. Figure 11 is a side elevational view of a transmission assembly in accordance with a seventh embodiment of the present invention. Figure 12 is a side elevational view of a transmission assembly in accordance with an eighth embodiment of the present invention. Figure 13 is a side elevational view of a transmission assembly in accordance with a ninth embodiment of the present invention. Figure 14A is a perspective view of a transmission assembly in accordance with a tenth embodiment of the present invention. Figure 14B is a side elevational view of Figure 14A. Figure 15 is a side elevational view of a transmission assembly in accordance with an eleventh embodiment of the present invention. Figure 16 is a side elevational view of a transmission assembly in accordance with a twelfth embodiment of the present invention. Figure 17 is a side elevational view of a transmission assembly in accordance with a thirteenth embodiment of the present invention.

10‧‧‧Transmission assembly

100‧‧‧Fixed components

200‧‧‧Active components

300‧‧‧Connector components

310‧‧‧First Link

320‧‧‧Second connecting rod

400a‧‧‧first pivot

400b‧‧‧second pivot

400c‧‧‧ third pivot

400d‧‧‧fourth pivot

500‧‧‧Deceleration components

510‧‧‧Rigid internal ring

520‧‧‧Flexible outer tooth cup

521‧‧‧First Torque Output Shaft

530‧‧‧ Waveform Generator

600‧‧‧ drive components

610‧‧‧Second Torque Output Shaft

620‧‧‧ Ontology

710‧‧‧ worm

720‧‧‧ worm gear

L‧‧‧ Extension line

S‧‧ plane

Claims (10)

A transmission assembly comprising: a fixing member for fixing to a frame; a movable member for coupling a chain guiding member; and a connecting member comprising a first connecting rod and a second connecting rod The first link is pivotally disposed at one of the fixing members with a first pivot, and is pivotally disposed at one of the movable members by a second pivot, the second link being a third pivot The pivoting member is disposed at another position of the fixing member, and is pivotally disposed at another position of the movable member by a fourth pivot. The extension line of the axis of the second pivot shaft and the axis of the fourth pivot shaft Forming a plane between the extension lines; and a driving member comprising a first torsion output shaft and a body, the body being located on a side of the plane facing the fixing member, the first torsion output shaft from the body and facing the plane Projecting, and an extension line of the axis of the first torsion output shaft passes through the plane, the first torsion output shaft is coupled to the second pivot or the fourth pivot to be a drive shaft to drive the The movable member moves relative to the fixed member. The transmission assembly of claim 1, further comprising a transmission member and a deceleration member, the deceleration member comprising a rigid inner ring gear, a flexible outer tooth cup, a wave generator and a second torque output shaft. The flexible outer toothed cup is disposed in the rigid inner ring gear, the second torque output shaft is coupled to the flexible outer tooth cup and passes through the rigid inner ring gear, and the transmission member engages the second torque output shaft and the a drive shaft for driving the movable member to rotate relative to the first link and the second link, wherein the waveform generator is disposed in the flexible external tooth cup, and the first torque output shaft is coupled to the waveform generator, To drive the waveform generator to rotate. The transmission assembly of claim 2, wherein the transmission member comprises a worm and a worm gear coaxially fixed to the second torque output shaft, the worm gear is coaxially fixed to the transmission shaft and meshed with the worm . The transmission assembly of claim 2, wherein the second pivot is the drive shaft, and the rigid inner ring of the reduction member is fixed to the first link. The transmission assembly of claim 2, wherein the fourth pivot is the drive shaft, and the rigid inner ring of the reduction member is fixed to the second link. The transmission assembly of claim 2, wherein the rigid inner ring gear, the flexible outer tooth cup and the wave generator are substantially located at the first pivot, the second pivot, the third pivot, and The fourth pivot is surrounded by the range. The transmission assembly of claim 1 wherein the drive shaft is fixed to the movable member. The transmission assembly of claim 1, wherein the first torsion output shaft is substantially within a range surrounded by the first pivot, the second pivot, the third pivot, and the fourth pivot. The transmission assembly of claim 1, further comprising an elastic member, wherein opposite ends of the elastic member are respectively connected to the first connecting rod away from one end of the fixing member and the second connecting rod is adjacent to one end of the fixing member . The transmission assembly of claim 9, wherein the elastic member is a tension spring.