TWI427226B - Centrifugal drive assembly for stepless speed change systems - Google Patents

Description

Centrifugal drive assembly for a stepless shifting system

The present invention relates to a stepless shifting system, and more particularly to a centrifugal drive assembly for a stepless shifting system.

The stepless speed change transmission mechanism has been widely used in various vehicles, especially the belt type stepless speed change transmission mechanism used in the locomotive, which not only makes the locomotive smooth in the speed change process, but also has simple operation without additional need Set the advantages of the shifting mechanism.

A conventional stepless speed change transmission mechanism, as described in the Republic of China Invention Patent Publication No. I341273, includes an input shaft, a drive plate group, a power output shaft, a drive plate group, and a transmission belt. The drive belt surrounds between the drive disc set and the drive disc set, and the drive disc set includes a drive disc, a slide drive disc, a stop disc, a bushing and a plurality of rollers. The input shaft rotates by the operation of an engine, thereby driving the drive disc group to rotate, and the roller located in the drive disc group rolls outward due to the centrifugal force generated by the rotation, and the drive disc is fixed. The roller pushes the sliding drive plate to move toward the stop plate, so that the drive belt sandwiched between the slide drive plate and the stop plate is pressed laterally, so that the drive belt is driven The diameter ratio of the pitch circle at the disc group and the drive disc group will be correspondingly changed according to the speed of the engine speed, and the effect of the stepless speed change transmission is achieved.

As can be seen from the above, the reciprocating movement of the roller in the driving disc group is an important factor affecting the shifting of the vehicle. The conventional roller is usually a cylinder. When the roller is moved to the outer side of the driving disc group by the centrifugal force, the sliding driving disc is pushed away from the driving disc, and the driving belt is enlarged. The pitch diameter of the driving disc group makes the vehicle run at a high speed, and when the vehicle wants to decelerate, the centrifugal force can only be reduced, so that the roller moves passively to the inner side of the driving disc group due to the reduction of the centrifugal force. The transmission belt is small in the pitch diameter of the driving disc group, thereby reducing the speed of the vehicle, however, the roller is thus reduced by the centrifugal force Passive movement and slow down, making the vehicle change operation between high and low speed, has the problem of slow speed reduction and poor control flexibility.

The main object of the present invention is to solve the problem of the conventional application of the roller in the stepless speed change transmission mechanism, the slow down speed of the linked vehicle, and the poor control flexibility.

In order to achieve the above object, the present invention provides a centrifugal drive assembly for a stepless shifting system. The stepless shifting system includes a movable disc and a fixed disc, and the fixed disc and the movable disc form an accommodation for the centrifugal drive. a chamber of the assembly, and the fixed disk has a plurality of abutment surfaces located in the chamber, and when the movable disk rotates, the centrifugal drive assembly moves in a radial direction from the initial position to a centrifugal position in the chamber The centrifugal drive assembly includes a weight and a combination body, the combined body has a covering member and an elastic returning member, the covering member covers the weighting block, and the elastic returning member is from the covering member One end wall extends in a direction opposite to the radial direction.

The elastic returning member includes a connecting end, an abutting end, and a curved portion disposed between the connecting end and the abutting end, the connecting end is in contact with the end wall, and the abutting end is away from the connecting end and The abutting surface is in contact, and the abutting tip is moved between the initial position to the initial position to be resisted by the abutting surface, and the bending portion is coupled to the abutting surface to generate a flexing deformation to provide the centrifugal driving component. A resilience that accelerates back to the initial position.

In this way, the present invention provides the elastic driving member on the combined body, so that the centrifugal driving assembly is accelerated from the centrifugal position to the initial position by the resilience force, thereby speeding down the vehicle and making the vehicle high. Between low-speed conversion, it is faster, improves the flexibility of operation, and increases the safety of driving.

The detailed description and technical contents of the present invention will now be described with reference to the following drawings: Please refer to FIG. 1 and FIG. 2, and FIG. 1 is a first embodiment of the present invention for a stepless shifting system. FIG. 2 is a partial schematic view of a first embodiment of the present invention for a stepless shifting system, and the present invention is a The centrifugal drive assembly 1 for a stepless transmission system includes a movable plate 30 and a fixed plate 40. The movable plate 30 is provided with a plurality of partition walls 33 and is interposed between the fixed plate 40 and the fixed plate 40. The partition wall 33 forms a plurality of chambers 34 corresponding to the centrifugal drive assembly 1 , and the movable disc 30 has a plurality of pushing surfaces 31 located in the chamber 34 , the pushing surface 31 and the centrifugal driving assembly 1 contacting, and the fixing plate 40 has a plurality of abutting faces 41 located in the chamber 34. The abutting surface 41 is in contact with the centrifugal drive assembly 1. When the movable plate 30 is rotated, the centrifugal drive assembly 1 is The chamber 34 moves from an initial position along a radial direction 32 to a centrifugal position.

3A is a perspective view of a first embodiment of the present invention, and FIG. 3B is a schematic exploded view of the first embodiment of the present invention. FIG. 3C is a schematic view of the structure of the first embodiment of the present invention. The centrifugal drive assembly 1 includes a weight 10 and a combination 20. In this embodiment, the weight 10 is a cylinder, for example, a cylinder. a body, a triangular column, a square column, a pentagonal column, or other types of positive polygonal columns tangential to an imaginary circle, and having an outer annulus 12 surrounding the cylinder, a snap groove 14 and a weight space 11 The snap groove 14 is formed along the outer annular surface 12 and is recessed inwardly by the outer annular surface 12, and the weight space 11 extends through an axial direction 13 of the cylinder.

The combination body 20 is assembled with the weight 10 and has a covering member 21 and an elastic returning member 22, and the covering member 21 covers the weight 10 along the outer annular surface 12, and A notch 213 is formed on the outer ring surface 12, and the notch 213 is inserted into the weight 10 to complete the assembly of the weight 10 and the combined body 20. Further, the cover member 21 includes a buckle. a portion 214 and a wear portion 212, the fastening portion 214 is attached to the outer ring surface 12, and the notch 213 is formed on the outer ring surface 12, and the notch 213 has an outer diameter D smaller than the one of the cylinders. In the embodiment, the diameter C is smaller than the inner diameter d formed by the inner ring surface 12 corresponding to the inner surface of the outer ring surface 12, so that the fastening portion 214 is embedded in the buckle groove 14 and buckled. The weight portion 10 is disposed between the weight 10 and the pushing surface 31, and has a translational sliding surface 2121 in contact with the pushing surface 31. In this embodiment, The translational sliding surface 2121 includes two planes and one a curved surface connected between the two planes and the two planes, and the two planes extending straight to the curved surface form an angle between 90 degrees and 135 degrees, so that the translational sliding surface 2121 and the pushing surface A relative contact slip is formed between 31.

The elastic returning member 22 extends from the end wall 211 of the covering member 21 in a direction opposite to the radial direction 32 (shown in FIG. 2) and has a length L greater than the outer diameter D of the cylinder, including a length a connecting end 221 , an abutting end 222 , and a curved portion 223 disposed between the connecting end 221 and the abutting end 222 . The connecting end 221 is connected to the end wall 211 , and the abutting end 222 is away from the connecting end 221 . Contacting the abutting surface 41, and the bending of the abutting surface 222 between the initial position and the initial position is resisted by the abutting surface 41, and the curved portion 223 is deformed relative to the abutting surface 41. In order to provide the centrifugal drive assembly 1 with a rebounding force that is accelerated back to the initial position, the elastic return member 22 further includes a tipping flange 224 from the connecting end 221 toward the connecting end 221 The radial direction 32 extends the protrusion.

Please refer to FIG. 4A - FIG. 4D, FIG. 4A - FIG. 4D is a schematic diagram of the operation flow for the stepless transmission system according to the first embodiment of the present invention. In FIG. 4A, The elastic driving member 1 is located at the initial position, and the elastic returning member 22 forms an elastic curved surface 225 between the elastic returning member 22 and the abutting surface 41 by the connecting end 221, the abutting end 222 and the curved portion 223. In FIG. 4B, when the movable disk 30 starts to rotate to push the centrifugal drive assembly 1 by a centrifugal force, the centrifugal drive assembly 1 is moved from the initial position along the radial direction 32 toward the centrifugal position, the elastic curved surface. 225 is deformed by the centrifugal force, and a deformation plane 226 is formed to abut against the abutting surface 41. The translational sliding surface 2121 pushes the pushing surface 31 to move the movable disk 30 away from its rotating axial direction 50. The fixed disk 40 is moved. In addition, when the centrifugal driving assembly 1 receives an abnormal force, the tip flange 224 interferes with the pushing surface 31 to prevent the translation sliding surface 2121 from being generated between the sliding sliding surface 2121. Scrolling, then in Figure 4C, for the centrifugal drive assembly 1 To the centrifugation position, the stop turned flange 224 card abuts against the movable between 40 30 and the fixing plate, so that the centrifugal drive assembly 1 will not produce tumbling, whereas in "FIG. 4D", when the movable platen 30 When the rotation is slowed down, as the centrifugal force becomes smaller, the elastic returning member 22 abutting against the abutting surface 41 is deformed by the deformation plane 226 to return to the elastic curved surface 225, thereby generating the Resilience, providing the centrifugal drive assembly 1 to be accelerated back to the initial position by the centrifugal position, and causing the anti-folding flange 224 to abut against the abutment surface 41 to prevent the centrifugal drive assembly 1 from rolling, and the movable disc The acceleration of 30 is moved toward the fixed disk 40. Finally, the centrifugal drive unit 1 returns to the initial position in Fig. 4A to complete a complete reciprocating movement.

5A is a schematic perspective view of a second embodiment of the present invention, and FIG. 5B is a schematic exploded view of a second embodiment of the present invention, and FIG. 5C is a schematic view of the structure of the second embodiment of the present invention. A side view of a second embodiment of the present invention. In this embodiment, another type of the weight member 10a for fixing the weight 10a is provided. The weight 10a is a solid cylinder and has a A top surface 15 and a bottom surface 16 are formed on opposite sides of the outer annular surface 12a, and the covering member 21a further includes an upper stopping portion 215, a lower stopping portion 216, a left stopping portion 217, and a right stopping portion 218, the covering member 21a covers the weight 10a along the outer annular surface 12a, and extends the upper stopping portion 215 and the lower stopping portion 216 by the upper stopping portion The notch 213a is formed on the outer ring surface 12a. The diameter C1 of the notch 213a is smaller than the outer diameter D1 of the cylinder, and the left stop portion 217 and the right stop portion 218 are formed. The top surface 15 and the bottom surface 16 are respectively attached, and the cover member 21a is fixed by the upper stop portion 215, the lower stop portion 216, the left stop portion 217, and the right stop portion 218. The weight 10a is such that the weight 10a is firmly coupled to the combined body 20a.

In summary, since the elastic reset member is disposed on the combined body, the centrifugal drive assembly is accelerated from the centrifugal position to the initial position by a resilient force of the resilient return member. Speeding down the speed of the vehicle, making the vehicle between the high and low speed transitions faster, improving the flexibility of operation, and increasing the safety of the driving. Further, the fastening body is further provided with the fastening component to make the weighting block When the combined body is buckled and fixed due to the long-term use, the user can replace the combined body with the matching body. The weight is disassembled and separated, and the weight is assembled with a new combination, and only the original combination needs to be replaced, thereby saving the cost of replacement. Therefore, the invention is highly advanced and conforms to the patent application. The essentials, the application of the law, the praying office to grant the patent as soon as possible, the real sense of virtue.

The present invention has been described in detail above, but the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the scope of the invention. That is, the equivalent changes and modifications made by the scope of the present application should remain within the scope of the patent of the present invention.

1, 1a‧‧‧ centrifugal drive components

10, 10a‧‧‧ weights

11‧‧‧weight space

12, 12a‧‧‧ outer annulus

13‧‧‧Axial

14‧‧‧Snap slot

15‧‧‧ top surface

16‧‧‧ bottom

20, 20a‧‧‧ combination

21, 21a‧‧‧ Covering parts

211‧‧‧End wall

212‧‧‧ wear parts

2121‧‧‧ translation sliding surface

213, 213a‧‧ ‧ gap

214‧‧‧Withholding department

215‧‧‧Upper stop

216‧‧‧ Lower stop

217‧‧‧Left stop

218‧‧‧Right stop

22, 22a‧‧‧ elastic reset parts

221‧‧‧Connected end

222‧‧‧ arrive at the top

223‧‧‧bend section

224 ‧ ‧ 翻 翻

225‧‧‧Elastic surface

226‧‧‧ deformation plane

30‧‧‧ movable plate

31‧‧‧Pushing face

32‧‧‧ Radial

33‧‧‧ partition wall

34‧‧‧ chamber

40‧‧‧ fixed disk

41‧‧‧Abutment

50‧‧‧Rotary axis

L‧‧‧ length

C, C1‧‧‧ caliber

D, D1‧‧‧ OD

d‧‧‧Inner diameter

Fig. 1 is a schematic exploded view showing the structure of a stepless shifting system according to a first embodiment of the present invention.

Figure 2 is a partial schematic view of a stepless shifting system in accordance with a first embodiment of the present invention.

FIG. 3A is a schematic perspective view of a first embodiment of the present invention.

Fig. 3B is a schematic exploded view showing the structure of the first embodiment of the present invention.

Figure 3C is a side elevational view of the first embodiment of the present invention.

4A-4D are schematic views showing the operation flow of the stepless shifting system according to the first embodiment of the present invention.

FIG. 5A is a schematic perspective view of a second embodiment of the present invention. FIG.

Figure 5B is a schematic exploded view showing the structure of the second embodiment of the present invention.

Figure 5C is a side elevational view of a second embodiment of the present invention.

1‧‧‧ centrifugal drive components

10‧‧‧weights

11‧‧‧weight space

12‧‧‧ outer annulus

13‧‧‧Axial

14‧‧‧Snap slot

20‧‧‧ combination

21‧‧‧Covering parts

211‧‧‧End wall

212‧‧‧ wear parts

214‧‧‧Withholding department

22‧‧‧Elastic reset parts

221‧‧‧Connected end

222‧‧‧ arrive at the top

223‧‧‧bend section

224 ‧ ‧ 翻 翻

Claims (8)

A centrifugal drive assembly for a stepless shifting system, the stepless shifting system comprising a movable disc and a fixed disc formed between the movable disc and a chamber for receiving the centrifugal drive assembly, the fixed disc having a plurality of An abutting surface of the chamber, and when the movable disc rotates, the centrifugal driving assembly moves in a radial direction from an initial position to a centrifugal position in the chamber, the centrifugal driving assembly includes: a weight And a combination body having a covering member covering the weight and an elastic returning member extending from the one end wall of the covering member toward the radial direction; wherein the elastic reset member The invention includes a connecting end that is in contact with the end wall, an abutting end that is away from the connecting end and is in contact with the abutting surface, and a curved section disposed between the connecting end and the abutting end. The position is moved to the initial position to be resisted by the abutment surface and the curved section is deformed relative to the abutment surface to provide a resilient force of the centrifugal drive assembly to accelerate back to the initial position. The centrifugal drive assembly for a stepless shifting system according to claim 1, wherein the movable disc has a plurality of pushing surfaces located in the chamber, the covering member further comprising a weight disposed on the weight And a wear portion between the pressing surface and the wear portion having a translational sliding surface in contact with the pushing surface. A centrifugal drive assembly for a stepless shifting system according to claim 1, wherein the resilient return member further comprises a turn-over flange extending from the connecting end toward the radial direction. The centrifugal drive assembly for a stepless shifting system according to claim 1, wherein the weight is a cylinder having an outer ring surface, and the covering member covers the outer ring surface Re-blocking and forming a gap for the weight to be snapped in. A centrifugal drive assembly for a stepless shifting system according to claim 4, wherein the resilient return member has a length greater than an outer diameter of the cylinder. The centrifugal drive assembly for a stepless shifting system according to claim 4, wherein the covering member further comprises a fastening portion attached to the outer annular surface, and the fastening portion is on the outer ring The notch is formed on the face, the notch having a diameter smaller than an outer diameter of one of the cylinders. The centrifugal drive assembly for a stepless shifting system according to claim 6, wherein the weight has a snap groove that is circumferentially and inwardly recessed along the outer annular surface and corresponding to the engaging portion. . The centrifugal drive assembly for a stepless shifting system according to claim 6, wherein the weight has a top surface and a bottom surface respectively contacting opposite sides of the outer ring surface, the covering member A left stop portion and a right stop portion respectively attached to the top surface and the bottom surface are further included.