TWI644040B - Multi-mode continuously variable transmission mechanism - Google Patents

Abstract

The present invention relates to a multi-mode stepless shifting mechanism, comprising a power input shaft and a driving disc set, the driving disc set comprising a driving disc, a sliding driving disc, a stationary pressing plate, a plurality of driving components and a movable pressing plate, wherein The plurality of driving components are pivotally disposed on the stationary platen, and the plurality of driving components include at least one first driving component and at least one second driving component, wherein the at least one second driving component has a contact portion that can abut against the movable platen. To limit the rotational movement of the partial plurality of drive elements, the movable platen is coupled to a switching module to control the axial movement of the movable platen. Thereby, the present invention can achieve a plurality of shifting characteristics by changing the axial component of the sliding driving disc by changing the initial position of the shifting of the different modes.

Description

Multi-mode stepless shifting mechanism

The present invention relates to a multi-mode stepless shifting mechanism, and more particularly to a multi-mode stepless shifting mechanism suitable for a vehicle.

For a general vehicle, if the vehicle is driven by the stepless shifting mode, a stepless shifting mechanism must be provided in the vehicle.

Please refer to FIG. 8 and FIG. 9 , which are schematic diagrams of the conventional multi-mode stepless shifting mechanism in an economic mode and an acceleration mode, respectively. As shown in the prior art, the multi-mode stepless shifting mechanism includes a power input shaft 81, a driving disc group 82, and a switching module disclosed in Taiwan Patent No. I568951 "Multi-mode stepless shifting mechanism". 85. The drive plate set 82 includes a drive plate 821, a slide drive plate 822, a stationary platen 823, a movable platen 825, and a plurality of stop blocks 826, a plurality of links 827, and a plurality of drive elements 824.

As shown in FIG. 8, when the movable platen 825 is slid to this position, and the blocking block 826 is vertically pushed to the driving element 824, the plural driving element 824 can be pushed at a small centrifugal force to push the sliding driving plate. 822 is axially slid along the input shaft 81; as shown in FIG. 9, when the movable platen 825 is slid to this position, and the blocking block 826 is tilted to push the driving element 824, it means that the plurality of driving elements 824 need to be larger. The centrifugal force can push the sliding drive plate 822 to slide axially along the input shaft 81.

However, in addition to the problems of the number of parts and the large axial width of the mechanism, the above-mentioned prior art has a small difference in the axial component force between the two modes (by using the same link mechanism to push the driving element), and the initial shift of the two modes. Different positions (the initial position of the shift is caused by the linkage mechanism pushing the drive element) will affect the overall shift performance.

Furthermore, please refer to FIG. 10 and FIG. 11 , which are schematic diagrams of another multi-mode stepless shifting mechanism in an economic mode and an acceleration mode, respectively. As shown in the prior art, the multi-mode stepless shifting mechanism includes a first input shaft 96, a drive plate assembly 97, and a push. The mechanism 99 and a switching module 98. The drive disk set 97 includes a drive plate 971, a slide drive plate 972, a stationary platen 973, and a plurality of drive elements 974. The pushing mechanism 99 includes a pushing member 993, a plurality of contacts 994, a bearing 992, and a screw 995. The pushing member 993 can drive the contact member 994 against the rocker arm 932 to rotate the rocker arm 932 around the rotating joint 933.

The principle of operation is the same as that described above, except that the above four-bar stop block is improved to a rocker type stop block, which can effectively reduce the number of parts. However, the prior art technique still has a problem that the difference in the axial component force between the two modes is small and the initial positions of the two modes are different. Please refer to FIG. 12 together, which is a comparison diagram of the engine speed-vehicle speed of the multi-mode stepless speed change mechanism in different modes. As shown in the figure, the economic mode is indicated by a broken line, and the acceleration mode is indicated by a solid line. If the correspondence between the economic mode of the conventional multi-mode stepless transmission mechanism and the engine speed of the acceleration mode and the vehicle speed is drawn as a single The chart can be found: (1) Since the economic mode is different from the initial position of the acceleration mode, the dotted line and the solid line will be offset before the shift, and the same initial shifting state cannot be provided. (2) Because the difference in the axial component of the economic mode and the acceleration mode is small, the engine speed of the two during the shifting period cannot be significantly different.

Because of this, in the spirit of active invention, we have thought of a multi-mode stepless shifting mechanism that can solve the above problems, and finally completed the present invention after several research experiments.

The main object of the present invention is to provide a multi-mode stepless shifting mechanism that pivots a plurality of driving elements on a stationary platen to replace the configuration method of the Pulizhu in the prior art, and can improve the Imperi in different modes. The initial position of the bead is different, which causes the problem that the initial speed of the vehicle speed cannot be consistent with the engine speed during the shifting process. In addition, the present invention further reduces the axial component force of the sliding driving disc by restricting the pivoting degree of the partial driving component when subjected to the centrifugal force, and achieves various shifting characteristics, and the difference in the rotational speed ratio between the different shifting characteristics is compared. Knowing the technology is more remarkable.

To achieve the above object, the multi-mode stepless shifting mechanism of the present invention comprises: an input shaft and a driving disc set, the driving disc set includes a driving disc, a sliding driving disc, a stationary pressing plate, a plurality of driving components, and a movable The pressing plate, the driving plate and the non-moving pressing plate are coaxially fixed on the input shaft, and the sliding driving plate is located between the driving plate and the non-moving pressing plate, and is coaxially slidably disposed on the input shaft, and when the input shaft rotates, the plurality of driving elements can be driven. With its centrifugal force, the sliding drive disc is axially slid along the input shaft.

The main technical feature of the present invention is that the plurality of driving components are pivotally disposed on the stationary platen, and the plurality of driving components include at least one first driving component and at least one second driving component, wherein at least one of the second driving components has a resistability The rotating portion of the plurality of driving elements is restricted by the contact portion of the movable platen. Further, the movable platen is coupled to a switching module to control the axial movement of the movable platen.

With the above design, the present invention improves the control method of the axial component force generated by the driving element, and can achieve significant shift characteristic difference in different modes, and the initial position of the driving element can be maintained at the same position during the mode switching. Unlike the traditional Pulizhu, which will be pushed by the movable platen to produce a displacement change, the initial position of the engine shifting of the present invention will also remain at the same time.

In the multi-mode stepless shifting mechanism, when the movable platen is away from the stationary platen and is subjected to centrifugal force, the contact portion cannot abut against the movable platen, and enters an economic mode, at least one of the first driving element and the at least one second driving element The centrifugal force pushes the sliding drive disc to slide axially along the input shaft. Thereby, the economic mode is that when the engine speed is low, the axial component of the sliding drive disc by the driving component is greater than the belt tension, so the shifting can be started, and the engine speed will remain fixed at this time.

In the multi-mode stepless shifting mechanism, when the movable platen is close to the stationary platen and is subjected to centrifugal force, the contact portion abuts against the movable platen and enters an acceleration mode, and at least one first driving element pushes the sliding drive plate with its centrifugal force. Axial sliding along the input shaft. Thereby, the acceleration mode is that when the engine speed is high, the axial driving force of the sliding driving disc by the driving component is greater than the belt tension, so the shifting can be started, and the engine speed will remain fixed at this time.

The sliding drive disc may be pivotally provided with a plurality of driven components corresponding to the plurality of driving components; the plurality of driven components may be a plurality of rollers. Thereby, the axial component force can be more smoothly transmitted to the sliding drive plate through the rolling contact relationship between the driving element and the driven element to cause axial displacement.

The movable platen may further include at least one protruding pin, and the fixed pressing plate may further include at least one opening, and the at least one protruding pin may correspondingly protrude into the at least one opening, so that the movable platen and the fixed platen can rotate synchronously.

The plurality of drive elements can be six drive elements, including three first drive elements and three second drive elements.

The position and angle of contact between the movable platen and the contact portion are variable. Therefore, the contact portion can be presented in various protruding structures, and the pivoting action of the driving member can be restricted, and is not limited to the contact portion pattern in the illustration of the present invention.

The switching module includes a driven gear having an internal thread, a driving gear meshing with the driven gear, a motor coupled to the driving gear, and a screw having an external screw, and the external screw The teeth screw the screw into the internal thread of the driven gear. Thereby, the driven gear is rotated by the motor to drive the driven gear to rotate, and the driven gear is screwed to the external thread of the screw by the internal screw, and the screw is fixed in the axial direction, and when the driven gear rotates, The axial displacement of the screw is caused by the action of the inner and outer screw teeth, so that the movable pressure plate can be displaced in the axial direction.

The above summary and the following detailed description are exemplary in order to further illustrate the scope of the invention. Other objects and advantages of the present invention will be described in the following description and drawings.

Please refer to FIG. 1 and FIG. 2, which are respectively a cross-sectional view and an exploded view of a multi-mode stepless shifting mechanism according to a preferred embodiment of the present invention. The figure shows a multi-mode stepless shifting mechanism, which mainly comprises an input shaft 1, a driving disc group 2 and a switching module 5. The driving disk unit 2 includes a driving plate 21, a sliding driving plate 22, a stationary pressing plate 23, six driving elements 24, and a movable pressing plate 25. The driving plate 21 and the stationary pressing plate 23 are coaxially fixed to the input shaft 1 , and the sliding driving plate 22 is located between the driving plate 21 and the stationary pressing plate 23 , and is coaxially slidably disposed on the input shaft 1 .

In this embodiment, the six driving elements 24 include three first driving elements 241 and three second driving elements 242, and each of the driving elements 24 is pivotally mounted on the movable platen 23 to be pivotally actuated. . The second driving component 242 has a contact portion 2421 that can abut against the movable platen 25, and the contact position and angle of the movable pressing plate 25 and the contact portion 2421 can be adjusted according to design parameters, so that the function of the contact portion 2421 can be achieved. The pivoting action of the second driving member 242 is restricted, and is not limited to the pattern of the contact portion 2421 in the illustrated embodiment of the present invention.

In addition, the sliding driving disk 22 is pivotally provided with six driven components 221 respectively corresponding to the six driving components 24, and in the embodiment, the six driven components 221 are six rollers, and the driving components are transmitted through the driving component. In a sliding contact relationship with the driven member 221, the axial component force can be more smoothly transmitted to the slide driving disk 22 to cause axial displacement. Moreover, the movable pressing plate 25 of the embodiment further includes three protruding pins 251, and the movable pressing plate 23 further includes three opening holes 231 corresponding to the protruding pins 251, wherein each protruding pin 251 corresponds to Each of the openings 231 is extended to synchronously rotate the movable platen 25 and the stationary platen 23.

On the other hand, the movable platen 25 is connected to a switching module 5 to control the axial movement of the movable platen 25. In this embodiment, the switching module 5 includes a driven gear 51 having an internal thread 511, a driving gear 52 meshing with the driven gear 51, a motor 53 coupled to the driving gear 52, and a The screw 54 of the outer screw 541, and by the screwing relationship between the outer screw 541 and the inner screw 511, the drive gear 51 can be displaced relative to the screw 54. Thereby, the drive gear 52 is rotated by the motor 53 to drive the driven gear 51 to rotate, and the driven gear 51 is screwed to the screw 541 outside the screw 54 by the internal screw 511, and the screw 54 is fixed in the axial direction. When the driven gear 51 rotates, the movable platen 25 can be axially displaced by the relative actuation of the inner and outer threads 511, 541, and the distance between the movable platen 25 and the stationary platen 23 can be changed.

Next, please refer to FIG. 3 and FIG. 4 , which are schematic diagrams showing the initial position of the multi-mode stepless shifting mechanism in the economic mode and the shifting end position according to a preferred embodiment of the present invention. As shown in FIG. 3, in the economic mode, the switching module 5 controls the movable platen 25 to move away from the stationary platen 23 in the axial direction. At this time, since the engine speed has not yet reached an economic critical reference, this embodiment uses 6000 rpm as an economic critical reference. The axial component of the slide drive disc 22 is not greater than the belt tension. Therefore, the slide drive disc 22 and the drive member 24 are still at the shift initial position, and the shift has not yet started. In contrast, as shown in FIG. 4, also in the economic mode, at this time, since the engine speed has exceeded the above economic critical reference, the axial component of the sliding drive disk 22 has been greater than the belt tension, and therefore, the driving element 24 will follow the centrifugal force. The slide drive disc 22 is continuously moved in the axial direction until the slide drive disc 22 and the drive member 24 reach the shift end position, and the shift shift is completed.

During the above-mentioned shifting process, since the movable platen 25 and the driving element 24 are appropriately spaced apart from each other, the contact portion 2421 of the second driving element 242 cannot be abutted against the movable platen 25 by the centrifugal force, so the first drive Both the element 241 and the second drive element 242 are free to pivotally move, and each of the six drive elements 24 can provide an axial component to push the slide drive disk 22. In this way, in the economic mode, the shift can be started at a lower engine speed (6000 rpm), effectively reducing the energy consumption.

Please refer to FIG. 5 and FIG. 6 , which are schematic diagrams showing the initial position of the multi-mode stepless shifting mechanism in the acceleration mode and the shifting end position according to a preferred embodiment of the present invention. As shown in FIG. 5, in the acceleration mode, the switching module 5 controls the movable platen 25 to approach the stationary platen 23 in the axial direction. At this time, since the engine speed has not reached an acceleration critical reference, the embodiment uses 8000 rpm as the acceleration critical reference. The axial component of the slide drive disc 22 is not greater than the belt tension. Therefore, the slide drive disc 22 and the drive member 24 are still at the shift initial position, and the shift has not yet started. In contrast, as shown in FIG. 6, also in the acceleration mode, at this time, since the engine speed has exceeded the above-mentioned acceleration critical reference, the axial component of the sliding drive disk 22 is greater than the belt tension, and therefore, the driving element 24 will follow the centrifugal force. The slide drive disc 22 is continuously moved in the axial direction until the slide drive disc 22 and the drive member 24 reach the shift end position, and the shift shift is completed.

During the shifting process, since the movable platen 25 and the driving member 24 are not spaced apart from each other, the contact portion 2421 of the second driving member 242 is biased against the movable platen 25 by the centrifugal force, so that only the first The drive member 241 is free to pivotally move, while the second drive member 242 is limited in that the movable platen 25 is not free to pivotally move, so only the first drive member 241 can provide an axial component to push the slide drive disk 22. Thereby, in the acceleration mode, it is limited to start shifting at a higher engine speed (8000 rpm), providing a higher shift speed and achieving faster acceleration.

In addition, please refer to FIG. 7 , which is a comparison diagram of the engine speed-vehicle speed of the multi-mode stepless speed change mechanism in different modes according to a preferred embodiment of the present invention, which can be referred to FIG. 3 to FIG. 6 . As shown in FIG. 7, the economic mode is indicated by a broken line, and the acceleration mode is indicated by a solid line. If the economic mode of the multi-mode stepless speed change mechanism of the present invention is compared with the engine speed of the acceleration mode and the vehicle speed, As a single chart, it can be found that: (1) Since the economic mode is the same as the initial position of the shifting mode of the acceleration mode, the dotted line and the solid line are overlapped before the shifting, which can provide the same initial shifting state and have better shifting performance. (2) Because the difference between the axial component of the economic mode and the acceleration mode is large, the difference between the engine speeds during the shifting period is more significant, and the shifting mode with higher acceleration or more fuel economy can be selected, and the shifting speed is better. performance.

The above-mentioned embodiments are merely examples for convenience of description, and the scope of the claims is intended to be limited to the above embodiments.

1‧‧‧Intake shaft

2‧‧‧ drive panel

21‧‧‧ drive disk

22‧‧‧Sliding drive

221‧‧‧ driven components

23‧‧‧No moving plate

231‧‧‧ openings

24‧‧‧Drive components

241‧‧‧First drive element

242‧‧‧Second drive element

2421‧‧Contacts

25‧‧‧ movable platen

251‧‧‧ protruding pin

5‧‧‧Switching module

51‧‧‧Driven gears

511‧‧‧ internal thread

52‧‧‧ drive gear

53‧‧‧Motor

54‧‧‧ screw

541‧‧‧ External thread

81‧‧‧Inlet shaft

82‧‧‧ drive panel

821‧‧‧ drive disk

822‧‧‧Sliding drive

823‧‧‧No moving plate

824‧‧‧Drive components

825‧‧‧ movable platen

826‧‧ ‧ block

827‧‧‧ Connecting rod

85‧‧‧Switch Module

932‧‧‧ rocker arm

933‧‧‧ joints

96‧‧‧Intake shaft

97‧‧‧ drive panel

971‧‧‧ drive disk

972‧‧‧Sliding drive

973‧‧‧No moving plate

974‧‧‧Drive components

98‧‧‧Switch Module

99‧‧‧Promoting institutions

992‧‧‧ bearing

993‧‧‧ Pusher

994‧‧‧Contacts

995‧‧‧ screw

1 is a cross-sectional view of a multi-mode stepless shifting mechanism in accordance with a preferred embodiment of the present invention. 2 is an exploded view of a multi-mode stepless shifting mechanism in accordance with a preferred embodiment of the present invention. 3 is a schematic view showing the initial position of the multi-mode stepless shifting mechanism in the economic mode according to a preferred embodiment of the present invention. 4 is a schematic view showing the shift end position of the multi-mode stepless shifting mechanism in the economic mode according to a preferred embodiment of the present invention. Figure 5 is a schematic illustration of the shifting initial position of the multi-mode stepless shifting mechanism in the acceleration mode in accordance with a preferred embodiment of the present invention. Fig. 6 is a schematic view showing the shift end position of the multi-mode stepless shifting mechanism in the acceleration mode according to a preferred embodiment of the present invention. Figure 7 is a comparison diagram of the engine speed-vehicle speed of the multi-mode stepless shifting mechanism in different modes according to a preferred embodiment of the present invention. Figure 8 is a schematic illustration of a conventional multi-mode stepless shifting mechanism in an economical mode. Figure 9 is a schematic illustration of a conventional multi-mode stepless shifting mechanism in an acceleration mode. Figure 10 is a schematic illustration of another multi-mode stepless shifting mechanism in an economical mode. Figure 11 is a schematic illustration of another multi-mode stepless shifting mechanism in an acceleration mode. Figure 12 is a comparison diagram of the engine speed-vehicle speed of the conventional multi-mode stepless shifting mechanism in different modes.

Claims (9)

A multi-mode stepless shifting mechanism includes: an input shaft and a driving disc set, the driving disc set includes a driving disc, a sliding driving disc, a stationary pressing plate, a plurality of driving components, and a movable pressing plate, and the driving disc and the driving disc The non-moving plate is coaxially fixed on the input shaft, and the sliding driving plate is located between the driving plate and the non-moving plate, and is coaxially slidably disposed on the input shaft. When the input shaft rotates, the plural driving can be promoted. The component is axially slid by the centrifugal force of the sliding driving disk along the input shaft; wherein the plurality of driving components are pivotally disposed on the movable platen, and the plurality of driving components comprise at least one first driving component and At least one second driving component, wherein the at least one second driving component has a contact portion that can abut against the movable pressing plate to restrict a part of the rotational movement of the plurality of driving components, and further, the movable pressing plate and a switching die The groups are connected to control the axial movement of the movable platen. The multi-mode stepless shifting mechanism of claim 1, wherein when the movable platen is away from the fixed platen and subjected to centrifugal force, the contact portion cannot abut against the movable platen, and enters an economic mode, the at least one The first driving element and the at least one second driving element push the sliding driving disc to axially slide along the input shaft with its centrifugal force. The multi-mode stepless shifting mechanism of claim 1, wherein when the movable platen is close to the fixed platen and subjected to centrifugal force, the contact portion abuts against the movable platen and enters an acceleration mode, the at least one The first driving element pushes the sliding drive disc axially along the input shaft by its centrifugal force. The multi-mode stepless shifting mechanism of claim 1, wherein the sliding drive disc pivot is provided with a plurality of driven components corresponding to the plurality of driving elements. The multi-mode stepless shifting mechanism of claim 4, wherein the plurality of driven components are plural rollers. The multi-mode stepless speed change mechanism of claim 1, wherein the movable pressure plate further comprises at least one protruding pin, the movable pressure plate further comprising at least one opening, the at least one protruding pin correspondingly extending into the at least one An opening is provided to enable the movable platen and the fixed platen to rotate synchronously. The multi-mode stepless shifting mechanism of claim 1, wherein the plurality of driving elements are six driving elements, including three first driving elements and three second driving elements. The multi-mode stepless shifting mechanism of claim 1, wherein the position and angle of contact between the movable platen and the contact portion are variable. The multi-mode stepless shifting mechanism of claim 1, wherein the switching module comprises a driven gear having an internal thread, a driving gear meshing with the driven gear, and a driving gear a motor coupled, and a screw having an external thread, and the screw is screwed to the internal thread of the driven gear by the external thread.