TWI391577B - Centrifugal clutch - Google Patents

Description

Centrifugal clutch

This invention relates to a clutch, and more particularly to a centrifugal clutch.

Referring to Figure 1, the prior art centrifugal clutch 1 is disposed on a transmission system 100. The transmission system 100 includes a driving wheel 101, a passive wheel 102 spaced apart from the driving wheel 101, a sleeve member 103 covering the driving wheel 101 and the driven wheel 102, and a driving member 102 extending through the driving wheel 102. Drive shaft 104.

Referring to Figures 2 and 3, and referring back to Figure 1, the centrifugal clutch 1 includes a base plate 11 disposed on the driven wheel 102, a drive plate 12 spaced from the base plate 11, and most of which are disposed on the base plate 11. a centrifugal weight 13 of the driving disk 12, a plurality of centrifugal weights 14 pivoted between each of the pivots 13 and the driving disk 12, and a plurality of adjacent centrifugal weights 14 The spring 15 is an outer cover 16 that is engaged with the drive shaft 104 and attached to the base plate 11 and the drive plate 12, and a plurality of friction plates 17 disposed on the side edges of each of the centrifugal weights 14.

The driving wheel 103 is engaged with the clutch member 103 to drive the driven wheel 102 to rotate, thereby interlocking the centrifugal clutch 1 to drive the centrifugal weight 14 by a centrifugal force in a separated position as shown in FIG. 2, and A movement between the abutment positions as shown in FIG.

When the centrifugal weight 14 is in the separated position, the centrifugal weight 14 and the friction plate 17 are separated from the outer cover 16, and the driving shaft 104 cannot be rotated by driving the outer cover 16. When the centrifugal weight 14 is in the abutment position, the centrifugal weight 14 drives each friction plate 17 against the outer cover 16 due to centrifugal force, thereby driving the outer cover by friction. 16 is rotated to drive the drive shaft 104 to rotate to transmit the power of the driving wheel 101.

However, when the torque required to drive the drive shaft 104 is greater than the friction between the outer cover 16 and the friction plate 17, or when the frictional resistance of the friction plate 17 is lowered, the friction plate 17 is not only caused. The high temperature is generated by the sliding contact with the outer cover 16, which shortens the overall service life; the friction plate 17 and the outer cover 16 are also intermittently abutted to form chatter vibration and generate noise.

In order to improve the above-mentioned shortcomings, the related art has proposed a technique disclosed in the invention patent of the "High-powered and swaying clutch" of the Republic of China Announcement No. I296255, which is improved in that the active disk can be driven by the bearing member. When the interlocking disc is subjected to the rotational resistance, the compression deformation of the bearing member forms a small angular displacement between the driving disc and the interlocking disc, so that the driving disc pushes the torque through the limiting portion. The V-shaped swaying block is slanted against the sloping surface of the sluice groove to strengthen the swaying ability of the piece to the passive disk member, and can be used by the bearing member when the rotation speed of the base block group is significantly slowed down The rebound force immediately drives the limit back.

Although the kinetic power between the blade and the passive disk can be improved, the following disadvantages still need to be improved:

1. Large volume increase: The number of overall components is much higher than the existing centrifugal clutch 1 (shown in Figure 1), which not only causes an overall increase in volume, but also increases production costs and makes assembly and maintenance difficult. Great increase.

2. The service life is short: since only one end of the limiting portion is fixed on the active disk, and the other end is suspended, the strength is low, so when the active disk drives the limiting portion to push on each of the moving blocks, not only The noise is generated by the mutual impact, and the other end of the defining portion is suspended to receive the side reaction force, which easily causes the deformation of the defining portion and affects the overall service life.

Accordingly, it is an object of the present invention to provide a centrifugal clutch that is small in size and long in service life.

Thus, the centrifugal clutch of the present invention is suitable for use in a transmission system of a vehicle having a power source, the centrifugal clutch including a drive unit, a friction unit located in the drive unit, and an auxiliary drive for assisting the friction unit unit.

The driving unit includes a base plate and a driving plate which are spaced apart from each other, wherein the base plate is formed with a plurality of positioning holes, and the driving plate is formed with a plurality of long holes corresponding to each of the positioning holes.

The friction unit includes a plurality of axially extending shafts corresponding to the positioning holes and the elongated holes, and a plurality of centrifugal weights pivotally disposed on each of the shafts, and are disposed on the outer circumference of each of the centrifugal weights. a friction member, an elastic member connecting a plurality of adjacent centrifugal weights, and an outer cover covering the friction member, wherein each centrifugal weight is formed with a perforation pierced by a corresponding shaft The friction member is located between each of the centrifugal weights between the outer covers.

The auxiliary unit includes a plurality of positioning pins extending from the centrifugal weights toward the driving plate, a plurality of driving pins extending from the driving plate toward the base plate, and a plurality of sleeves disposed on the corresponding positioning pins and the driving pins. a linking member, and a positioning ring disposed on the driving plate and having a plurality of sleeve holes, wherein the positioning pin is located at one end of each centrifugal weight opposite to the pivoted shaft, the positioning ring The sleeve hole can position each shaft in cooperation with each positioning hole.

The transmission system can drive the centrifugal weight to move between a power transmission position and a non-power transmission position relative to the outer cover via power of the power source, and the friction member is abutted when the power transmission position is located And on the outer cover, and the driving pin and the linking member can transmit the power of the transmission system to the corresponding positioning pin to form a force acting on each of the centrifugal weights, and when the non-power transmission is located In position, the resilient element drives each centrifugal weight to separate the friction member from the outer cover.

The utility model utilizes the driving pin and the linking member to transmit the power of the power source to the corresponding positioning pin, thereby forming a force acting on each centrifugal weight block, avoiding the outer cover and each The friction member on the centrifugal weight block is slipped to reduce the generation of frictional heat and chatter vibration, and the overall structure is simple, the volume is small, and the life is long.

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments of the invention.

Before the present invention is described in detail, it is noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to Figure 4, a first preferred embodiment of the centrifugal clutch 2 of the present invention includes a drive unit 3, a friction unit 4 located in the drive unit 3, and an auxiliary unit 5 that assists in driving the friction unit 4.

The driving unit 3 includes a base plate 31 and a driving plate 32 which are spaced apart from each other. The base plate 31 is formed with a plurality of positioning holes 311, and the driving plate 32 has a mounting portion 321 and a bottom edge diameter of the mounting portion 321 An outwardly extending flange portion 322, a plurality of elongated holes 323 formed in the flange portion 322 corresponding to each of the positioning holes 311, and a plurality of elongated holes 323 are formed at intervals in the flange portion Mounting holes 324 on 322.

The friction unit 4 includes a plurality of shafts 41 extending axially from the corresponding positioning holes 311 and the elongated holes 323, and a plurality of centrifugal weights 42 pivotally disposed on each of the shafts 41. a friction member 43 on the outer circumference of the weight 42, a plurality of elastic members 44 connecting the two adjacent centrifugal weights 42, and an outer cover 40 covering the friction member 43, wherein each centrifugal weight 42 A perforation 420 is formed through the corresponding shaft 41. The friction member 43 is located between each of the centrifugal weights 42 between the outer cover 40.

The auxiliary unit 5 includes a plurality of positioning pins 51 extending from the centrifugal weight 42 toward the driving plate 32, and a driving pin extending from the driving plate 32 toward the base 31. 52. A plurality of positioning members 53 disposed on the corresponding positioning pins 51 and the driving pins 52, and a positioning ring 54 disposed on the mounting portion 321 of the driving plate 32 and having a plurality of fitting holes 541. The positioning pin 51 is located at one end of each of the centrifugal weights 42 opposite to the pivoted shaft 41. The sleeve 541 of the positioning ring 54 can be positioned with each positioning hole 311 to coordinate each axis. Rod 41.

Referring to FIG. 5, the centrifugal clutch 2 is disposed on a transmission system 7 of a vehicle (not shown) having a power source 6. The transmission system 7 includes a driving wheel 72 driven by the power source 6. A driven wheel 73 spaced apart from the driving wheel 72, a transmitting member 74 for transmitting the power of the driving wheel 72 to the driven wheel 73, and a drive shaft 75 extending through the driven wheel 73 to output power. The base plate 31 of the centrifugal clutch 2 is disposed on the driven wheel 73. The drive shaft 75 extends through the base plate 31 and the drive plate 32 and engages with the outer cover 40.

It should be particularly noted that, in practical applications, the base plate 31 of the centrifugal clutch 2 can also be disposed on the driving wheel 72, and the same effect can be achieved, which is not limited by the disclosure of the embodiment. .

In the preferred embodiment, the vehicle is a locomotive, the power source 6 is an internal combustion engine, and the transmission member 74 is a belt and the driving wheel 72 and the driven wheel 73 are both pulleys. The power source 6 can of course also be an electric motor or a hybrid machine, and the effect of driving the driving wheel 72 can still be achieved.

However, in practical applications, the vehicle may also be an all-terrain vehicle (ATV), an UV vehicle or a tricycle. Of course, the transmission member 74 may also be a chain, and at this time, the driving wheel 72 and the passive wheel 73 are both The sprocket; if both the driving wheel 72 and the driven wheel 73 are gears, the transmitting member 74 is an idler that can mesh with the driving wheel 72 and the driven wheel 73, and can still achieve the power transmission.

Referring to Figures 6 and 7, and reviewing Figure 5 together, for ease of illustration, the drive plate 32 of Figures 6 and 7 is drawn in phantom lines, and the power source 6 is used to drive the power transmission of the drive wheel 72 by the transmission member 74. The driven wheel 73 is driven to rotate, and the driven wheel 73 can drive the base plate 31 and the shaft 41 to rotate along with the direction indicated by an arrow 81 in FIG. 6, so that the shaft 41 is opposite to each elongated hole. The misalignment in 323 is moved to the position shown in FIG. 7, and the driving disk 32 is rotated along with the base plate 31, thereby driving the driving pin 52 to interlock each of the linking members 53, and the driving plate 32 is driven by each linking member 53. The rotational power of the drive pin 52 is transmitted to each of the positioning pins 51, and the centrifugal force generated when the base plate 31 rotates drives each centrifugal weight 42 to move from the non-power transmission position shown in FIG. In the power transmission position shown in FIG. 7, the elastic member 44 is stretched, and the friction member 43 can be abutted against the outer cover 40, and the friction between the friction member 43 and the outer cover 40 is utilized. The outer cover 40 is driven to drive the drive shaft 75 to rotate to output power.

At this time, by the driving pin 52 and the linking member 53 and the positioning pin 51, the rotating power is turned into a force 82 acting on each of the centrifugal weights 42, and the force 82 acts on the outer cover 40. A positive force 83 perpendicular to the tangential direction of the outer cover 40 can be generated, and the positive force 83 of the force 82 can increase the friction between the friction member 43 and the outer cover 40, thereby effectively avoiding The outer cover 40 and the friction member 43 on each of the centrifugal weights 42 are slipped to avoid power loss, and at the same time, the generation of frictional heat and chatter vibration can be reduced to reduce the operating temperature and increase the overall service life.

When the rotational speed decreases, the elastic restoring force of the elastic member 44 drives the automatic force transmission position of each centrifugal weight 42 to return to the non-power transmission position, so that the friction member 43 is separated from the outer cover 40, and The power output of the drive shaft 75 is broken.

With the above design, the centrifugal clutch 2 has the following advantages:

1. High stability and long service life: the driving pin 52 and the linking member 53 are used to transmit the power of the power source 6 to the corresponding positioning pin 51, thereby forming a function on each centrifugal weight 42. The force 82 increases the friction between the friction member 43 on each centrifugal weight 42 and the outer cover 40 to prevent the outer cover 40 from slipping with the friction member 43 on each centrifugal weight 42 to reduce Friction heat and chattering increase the overall stability and service life.

2. Small volume and simple structure: Compared with the existing centrifugal clutch, the centrifugal clutch 2 only adds the auxiliary unit 5, so that not only the number of components can effectively reduce the volume, but also the raw material cost can be reduced and the assembly and maintenance can be simplified. rapid.

Referring to Figure 8, a second preferred embodiment of the centrifugal clutch 2 of the present invention substantially comprises a drive unit 3, a friction unit 4 located in the drive unit 3, and an auxiliary drive, as in the first preferred embodiment. The auxiliary unit 5 of the friction unit 4.

Wherein, the difference is that each of the centrifugal weights 42 is formed with a long hole 421 pivoted on the corresponding shaft 41, and the friction unit 4 further includes a plurality of centrifugal weights. The bushing 45 in the long hole 421 of the 42, and the driving disk 32 is formed with a plurality of sleeve holes 325 corresponding to each positioning hole 311, and the shaft 41 is worn through each bushing 45. The holes are disposed in the corresponding elongated holes 421, and the opposite ends are positioned and placed in each of the plurality of holes 325 and the positioning holes 311.

Since the preferred embodiment is substantially the same as the first preferred embodiment, the centrifugal weight 42 can be avoided by the bushing 45 when the same effect as the first preferred embodiment can be achieved. It is worn by the shaft 41 to increase the service life. In addition, a different embodiment of the first preferred embodiment is provided for the user to select.

In summary, the centrifugal clutch 2 of the present invention utilizes the driving pin 52 and the linking member 53 to transmit the power of the power source 6 to the corresponding positioning pin 51, thereby forming a function for each centrifugal weight. The force 82 on the 42 increases the friction between the friction member 43 and the outer cover 40, and prevents the outer cover 40 from slipping with the friction member 43 on each centrifugal weight 42 to reduce frictional heat and vibration. The occurrence of the earthquake, and the overall structure is simple, the volume is small, and the life is long, so the object of the present invention can be achieved.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent.

2. . . Centrifugal clutch

3. . . Drive unit

31. . . Base plate

311. . . Positioning hole

32. . . Disk drive

321. . . Installation department

322. . . Flange

323. . . Long hole

324. . . Mounting holes

325. . . Socket hole

4. . . Friction unit

40. . . s

41. . . Shaft

42. . . Centrifugal weight

420. . . perforation

421. . . Long hole

43. . . Friction member

44. . . Elastic component

45. . . bushing

5. . . Auxiliary unit

51. . . Locating pin

52. . . Drive pin

53. . . Linkage

54. . . Locating ring

541. . . Socket hole

6. . . Power source

7. . . Transmission system

72. . . Driving wheel

73. . . Passive wheel

74. . . Passing piece

75. . . Drive shaft

81. . . arrow

82. . . Force

83. . . Positive force

Figure 1 is an exploded perspective view of a prior art centrifugal clutch;

Figure 2 is a cross-sectional view showing the centrifugal clutch in a separated position;

Figure 3 is a cross-sectional view showing the centrifugal clutch in a resting position;

Figure 4 is an exploded perspective view showing the first preferred embodiment of the centrifugal clutch of the present invention;

Figure 5 is a schematic view showing the state of use of the first preferred embodiment;

Figure 6 is a cross-sectional view showing the first preferred embodiment in a non-power transmission position;

Figure 7 is a cross-sectional view showing the first preferred embodiment in a power transmission position;

Figure 8 is an exploded perspective view showing a second preferred embodiment of the centrifugal clutch of the present invention.

2. . . Centrifugal clutch

3. . . Drive unit

31. . . Base plate

311. . . Positioning hole

32. . . Disk drive

321. . . Installation department

322. . . Flange

323. . . Long hole

324. . . Mounting holes

4. . . Friction unit

40. . . s

41. . . Shaft

42. . . Centrifugal weight

420. . . perforation

43. . . Friction member

44. . . Elastic component

5. . . Auxiliary unit

51. . . Locating pin

52. . . Drive pin

53. . . Linkage

54. . . Locating ring

541. . . Socket hole

Claims (9)

A centrifugal clutch suitable for use in a transmission system of a vehicle having a power source, the centrifugal clutch comprising: a driving unit comprising a base plate and a driving plate spaced apart from each other, wherein the base plate is formed with a plurality of positioning a hole, and the drive plate is formed with a plurality of long holes corresponding to each of the positioning holes; a friction unit comprising a plurality of axially extending shafts corresponding to the positioning holes and the elongated holes, most of which are pivoted on each of the shafts a centrifugal weight on the top, a plurality of friction members disposed on the outer circumference of each centrifugal weight, a plurality of elastic members connecting the two adjacent centrifugal weights, and an outer cover covering the friction member, wherein Each centrifugal weight is formed with a perforation pierced by a corresponding shaft, the friction member is located between each centrifugal weight and the outer cover; and an auxiliary unit, including a majority a positioning pin extending from the centrifugal weight toward the driving plate, a driving pin extending from the driving plate toward the base, a plurality of connecting members disposed on the corresponding positioning pin and the driving pin, and a a positioning ring formed on the movable plate and having a plurality of sleeve holes, wherein the positioning pin is located at one end of each centrifugal weight opposite to the pivoted shaft, and the sleeve hole of the positioning ring can Each positioning hole cooperates to position each shaft; the transmission system can drive the centrifugal weight to move relative to the outer cover between a power transmission position and a non-power transmission position via power of the power source, when the power is located When the position is transmitted, the friction member is abutted against the outer cover, and the driving pin and the linking member can transmit the power of the power source to the corresponding positioning pin to form a function of each centrifugal weight. The upper force, and when in the non-power transmission position, the elastic element drives each centrifugal weight to separate the friction member from the outer cover. The centrifugal clutch of claim 1, wherein the drive plate of the drive unit is further formed with a plurality of mounting holes for each drive pin to be placed. The centrifugal clutch of claim 2, wherein the drive plate of the drive unit has a mounting portion that passes through the positioning ring, and a flange that extends radially outward from a bottom edge of the mounting portion. The elongated hole and the mounting hole are formed on the flange portion. The centrifugal clutch according to claim 1, wherein the transmission system includes a driving wheel driven by the power source, a driven wheel spaced apart from the driving wheel, and a power transmission to the driving wheel to a transmission member of the driven wheel, and a drive shaft extending through the driven wheel to output power, wherein a base plate of the driving unit of the centrifugal clutch is disposed on the driven wheel, and the drive shaft is extended to The base plate and the drive plate engage with the outer cover. A centrifugal clutch suitable for use in a transmission system of a vehicle having a power source, the centrifugal clutch comprising: a driving unit comprising a base plate and a driving plate spaced apart from each other, wherein the base plate is formed with a plurality of positioning a hole, and the drive plate is formed with a plurality of sleeve holes corresponding to each of the positioning holes; a friction unit includes a plurality of shafts axially inserted into the corresponding positioning holes and the sleeve holes, and most of the shafts are pivoted on each of the shafts a centrifugal weight on the top, a plurality of friction members disposed on the outer circumference of each centrifugal weight, a plurality of elastic members connecting the two adjacent centrifugal weights, and an outer cover covering the friction member, wherein Each of the centrifugal weights is formed with a long hole pierced by a corresponding shaft, and the opposite ends of the shaft are positioned and placed in each of the plurality of holes and the positioning holes, a friction member is disposed between each of the centrifugal weights and the outer cover; and an auxiliary unit includes a plurality of positioning pins extending from the centrifugal weights toward the driving plate, and most of the driving plates are oriented toward the substrate Extended drive pin And a plurality of linkages disposed on the corresponding positioning pin and the driving pin, wherein the positioning pin is located at one end of each centrifugal weight opposite to the pivoted shaft; the transmission system can be powered by the power source The driving force drives the centrifugal weight to move relative to the outer cover between a power transmission position and a non-power transmission position, and when the power transmission position is located, the friction member abuts against the outer cover, and The driving pin and the linking member can transmit the power of the power source to the corresponding positioning pin to form a force acting on each of the centrifugal weights, and when located in the non-power transmitting position, the elastic member Each centrifugal weight is driven to separate the friction member from the outer cover. The centrifugal clutch of claim 5, wherein the friction unit further comprises a plurality of bushings disposed in the elongated holes of each of the centrifugal weights, the shafts being placed on each of the linings. The sleeve is inserted into the corresponding long hole. The centrifugal clutch of claim 5, wherein the drive plate of the drive unit is further formed with a plurality of mounting holes for each drive pin to be placed. The centrifugal clutch according to claim 7, wherein the driving plate of the driving unit further has a mounting portion, and a flange portion extending radially outward from a bottom edge of the mounting portion, the mounting hole The sleeve holes are formed on the flange portion. A centrifugal clutch according to claim 5, wherein the transmission system includes a driving wheel driven by the power source, a driven wheel spaced apart from the driving wheel, and a power transmitting the driving wheel to a transmission member of the driven wheel, and a drive shaft extending through the driven wheel to output power, wherein a base plate of the driving unit of the centrifugal clutch is disposed on the driven wheel, and the drive shaft is extended to The base plate and the drive plate engage with the outer cover.