CN109099116B

CN109099116B - Speed changer

Info

Publication number: CN109099116B
Application number: CN201811121830.4A
Authority: CN
Inventors: 李丽丽; 李永建
Original assignee: Hangzhou Fuyang Xinyuan New Energy Co Ltd
Current assignee: Hangzhou Bifu Technology Co ltd
Priority date: 2017-12-15
Filing date: 2017-12-15
Publication date: 2021-02-12
Anticipated expiration: 2037-12-15
Also published as: CN108999938A; CN108050215B; CN108916328A; CN109099116A; CN108050215A; CN108999938B; CN108916328B

Abstract

The invention belongs to the technical field of transmissions, and particularly relates to a transmission which comprises a mounting plate, a drum wheel, an input shaft, a Z-shaped ring and an output shaft, wherein when the input shaft rotates, a driving plate rotates to drive an arc-shaped strip to rotate; the third fixed shaft rotates to drive the second sun gear to rotate through the second one-way ring; the second planet wheel rotates to drive the inner gear ring to rotate; the inner gear ring drives the output shaft to rotate; when the arc-shaped strip moves at a high speed, the centrifugal block can rub the drum wheel when the centrifugal block is contacted with the drum wheel in the moving process of the centrifugal block, the drum wheel is driven to rotate by the arc-shaped strip through the friction between the centrifugal block and the drum wheel, the first sun wheel is driven to rotate by the rotation of the Z-shaped wheel through the first one-way ring, and the inner gear ring is driven to rotate by the first planet wheel; the inner gear ring drives the output shaft to rotate. The beneficial effect of two-gear transmission is realized by using a simple structure.

Description

Speed changer

Technical Field

The invention belongs to the technical field of transmissions, and particularly relates to a transmission.

Background

At present, gears of a commonly used transmission in the transmission are over three gears, and a two-gear transmission required in equipment needing only two-gear speed change is complex in structure or low in reliability, and the technical cost required for changing the traditional transmission with over three gears into the two-gear transmission is high, so that the transmission with only two gears is necessary to design.

The present invention is directed to a transmission that solves the above problems.

Disclosure of Invention

In order to solve the defects in the prior art, the invention discloses a transmission which is realized by adopting the following technical scheme.

A transmission, characterized by: the planetary gear transmission mechanism comprises a mounting plate, a fixed cylinder, a fixed ring, an inner gear ring, a drum wheel, an input shaft, a Z-shaped ring, a first one-way ring, a first planetary wheel, a second planetary wheel, a first fixed shaft, a second fixed shaft, an output shaft, a first sun wheel, a second one-way ring, a fixed shaft plate, a second sun wheel, a fixed shaft disc, a third fixed shaft, a driving plate, an arc-shaped strip, a first cylindrical pin, a second cylindrical pin, a centrifugal block fixing spring, a centrifugal groove, an extension spring fixing column, an extension spring, a disc, an input shaft support, a fixed cylinder support, a fixed ring support, a guide block and a guide block groove, wherein the input shaft support, the fixed cylinder support and the fixed ring support are all mounted on the mounting plate, the fixed cylinder is mounted on the fixed cylinder support, the drum wheel and the Z-shaped ring are mounted on the inner wall, one side of the non-protruding surface of the Z-shaped ring is provided with a drum wheel and is connected with one side of the drum wheel, and the outer circular surface of the Z-shaped ring is arranged on the inner circular surface of the fixed cylinder; the input shaft is mounted on the input shaft support, and one side of the driving plate is mounted on the input shaft at the middle position; two ends of the other side of the driving plate are respectively provided with a first cylindrical pin; the driving plate is respectively provided with two arc-shaped strips through two first cylindrical pins, and for any one arc-shaped strip, one end which is not connected with the first cylindrical pin is close to the first cylindrical pin connected with the other arc-shaped strip; the mounting structure of each arc-shaped strip is completely the same, and for any one of the arc-shaped strips, six centrifugal grooves are uniformly and sequentially formed on the arc-shaped surface of one side of the arc-shaped strip facing the drum wheel; one end of the arc-shaped strip, which is not connected with the second cylindrical pin, is provided with the second cylindrical pin; the six centrifugal blocks are respectively arranged in the six centrifugal grooves; a centrifugal block fixing spring is respectively arranged between the bottom end of each centrifugal groove and the corresponding centrifugal block; a second cylindrical pin arranged on one of the two arc-shaped strips is matched with a first cylindrical pin connected with the other arc-shaped strip; an extension spring fixing column is arranged on each of the first cylindrical pin and the second cylindrical pin, and an extension spring is arranged between two corresponding extension spring fixing columns on the first cylindrical pin and the second cylindrical pin which are matched with each other; the fixing ring is arranged on the fixing ring support; the inner gear ring is arranged in the fixed ring and can rotate and slide in the fixed ring, and the disc is arranged on one side of the inner gear ring; the output shaft is arranged on the disc; the three first fixed shafts are circumferentially and uniformly arranged on one side of the fixed cylinder; the three first planet wheels are respectively arranged on the three first fixed shafts; the first sun gear is arranged on the Z-shaped ring through a first one-way ring; the first sun gear is meshed with the three first planet gears which are all meshed with the inner gear ring; the third fixed shaft is arranged in a circular hole in the center of the first sun gear and can rotate in the circular hole of the first sun gear; the fixed shaft disc is arranged at one end of the third fixed shaft, and the outer circular surface of the fixed shaft disc is matched with the inner arc surfaces of the two arc strips; the second sun gear is arranged on the third fixed shaft through a second one-way ring, and the diameter of the first sun gear is twice of that of the second sun gear; the three second fixed shafts are respectively arranged at one ends of the three first fixed shafts through three fixed shaft plates, the three second planet wheels are respectively arranged on the three second fixed shafts, the second sun wheel is meshed with the three second planet wheels, and the three second planet wheels are all meshed with the inner gear ring.

As a further improvement of the technology, the fixed cylinder is supported and welded on the mounting plate; the fixing ring is welded on the fixing ring support; the input shaft is axially welded to the mounting plate.

As a further improvement of the technology, the fixing ring is supported and welded on the mounting plate; the fixed cylinder is welded on the fixed cylinder support.

As a further improvement of the technology, the centrifugal block fixing spring is an extension spring.

As a further improvement of the technology, two guide blocks are symmetrically arranged on two sides of the centrifugal block; two guide grooves are symmetrically formed in the two side faces of the centrifugal block groove; the centrifugal block is arranged in the centrifugal groove through the matching of the two guide blocks and the two guide grooves.

Compared with the traditional transmission technology, the transmission provided by the invention can be used for adjusting two speeds, so that the purposes of rapidness and convenience, simple structure and better use effect are achieved.

The invention is characterized in that an input shaft is arranged on an input shaft support, and one side of a driving plate is arranged on the input shaft at the middle position; when the input shaft rotates, the input shaft rotates to drive the driving plate to rotate around the axis of the input shaft; two ends of the other side of the driving plate are respectively provided with a first cylindrical pin; the driving plate is respectively provided with two arc-shaped strips through two first cylindrical pins, and for any one arc-shaped strip, one end which is not connected with the first cylindrical pin is close to the first cylindrical pin connected with the other arc-shaped strip; the driving plate rotates to drive the arc-shaped strips to rotate, when the rotating speed of the arc-shaped strips is small, the centrifugal block is slightly influenced by centrifugal force, the fixed shaft disc is installed at one end of the third fixed shaft, the outer circular surface of the fixed shaft disc is matched with the inner arc surfaces of the two arc-shaped strips, the arc-shaped strips and the fixed shaft disc are still in a clamping state, and the arc-shaped strips can drive the fixed shaft disc to rotate; the second sun gear is arranged on the third fixed shaft through the second one-way ring, the fixed shaft disc drives the third fixed shaft to rotate, and the third fixed shaft rotates and drives the second sun gear to rotate through the second one-way ring; the three second fixed shafts are respectively arranged at one ends of the three first fixed shafts through three fixed shaft plates, the three second planet wheels are respectively arranged on the three second fixed shafts, the second sun wheel is meshed with the three second planet wheels, and the three second planet wheels are all meshed with the inner gear ring. The second sun gear rotates to drive the second planet gear to rotate; the inner gear ring is arranged in the fixed ring and can rotate and slide in the fixed ring, and the disc is arranged on one side of the inner gear ring; the output shaft is arranged on the disc; the second planet wheel rotates to drive the inner gear ring to rotate; the inner gear ring drives the output shaft to rotate.

The invention is characterized in that an input shaft is arranged on an input shaft support, and one side of a driving plate is arranged on the input shaft at the middle position; when the input shaft rotates, the input shaft rotates to drive the driving plate to rotate around the axis of the input shaft, and two ends of the other side of the driving plate are respectively provided with a first cylindrical pin; the driving plate is respectively provided with two arc-shaped strips through two first cylindrical pins, and for any one arc-shaped strip, one end which is not connected with the first cylindrical pin is close to the first cylindrical pin connected with the other arc-shaped strip; the driving plate rotates to drive the arc-shaped strip to rotate, and when the arc-shaped strip moves at a high speed, six centrifugal grooves are uniformly and sequentially formed in the arc-shaped surface of one side, facing the drum wheel, of the arc-shaped strip; the six centrifugal blocks are respectively arranged in the six centrifugal grooves; a centrifugal block fixing spring is respectively arranged between the bottom end of each centrifugal groove and the corresponding centrifugal block; the centrifugal block arranged in the arc-shaped strip moves towards the outer side of the arc-shaped strip under the action of centrifugal force, when the centrifugal block is in contact with the drum wheel in the moving process, the centrifugal block can rub against the drum wheel, the centrifugal block is separated from the arc-shaped strip at the moment, but the arc-shaped strip can be separated from the fixed shaft disc along with the increase of speed, and the arc-shaped strip is combined with the centrifugal block; the drum wheel and the Z-shaped ring are fixedly arranged on the inner wall of the cylinder fixing cylinder through installation, the fixing cylinder is fixedly arranged on the installation plate through a fixing cylinder support, the drum wheel is arranged on one side of the non-protruding surface of the Z-shaped ring and connected with one side of the drum wheel, and the outer circular surface of the Z-shaped ring is arranged on the inner circular surface of the fixing cylinder; the arc-shaped strip drives the drum wheel to rotate through the friction between the centrifugal block and the drum wheel, and the drum wheel rotates to drive the Z-shaped wheel to rotate; the three first fixed shafts are circumferentially and uniformly arranged on one side of the fixed cylinder; the three first planet wheels are respectively arranged on the three first fixed shafts; the first sun gear is arranged on the Z-shaped ring through a first one-way ring; the first sun gear is meshed with the three first planet gears which are all meshed with the inner gear ring; the Z-shaped wheel rotates to drive the first sun wheel to rotate through the first one-way ring, and the first sun wheel rotates to drive the first planet wheel to rotate; the inner gear ring is arranged in the fixed ring and can rotate and slide in the fixed ring, and the disc is arranged on one side of the inner gear ring; the output shaft is arranged on the disc; the first planet wheel drives the inner gear ring to rotate; the inner gear ring drives the output shaft to rotate; because the arc strip breaks away from the fixed shaft disc at this moment, the arc strip can not drive the fixed shaft disc to rotate.

When the first planet wheel rotates to drive the inner gear ring to rotate, the inner gear ring can drive the second planet wheel to rotate; the second planet wheel rotates to drive the second sun wheel to rotate; the second sun gear can not drive the third fixed shaft to rotate under the action of the second one-way ring; namely, when the first planet wheel rotates to drive the inner gear ring to rotate, the third fixed shaft does not influence the transmission of the driving plate; when the second planet wheel rotates to drive the inner gear ring to rotate, the inner gear ring can drive the first planet wheel to rotate; the first planet wheel rotates to drive the first sun wheel to rotate; the first sun wheel does not drive the Z-shaped wheel to rotate under the action of the first one-way ring; namely, when the second planet wheel rotates to drive the inner gear ring to rotate, the Z-shaped wheel does not influence the rotation of the drum wheel.

The fixed cylinder and the fixed ring are respectively and fixedly arranged on the fixed cylinder support and the fixed ring support, so that the motion stability of the drum wheel, the Z-shaped ring and the inner gear ring can be ensured, and the effect of balancing and rotating the Z-shaped ring and the inner gear ring of the drum wheel is achieved. The fixed cylinder plays a role in supporting the drum wheel and the Z-shaped ring.

When people use the transmission designed by the invention, when the input shaft rotates, the input shaft rotates to drive the driving plate to rotate around the axis of the input shaft, the driving plate rotates to drive the arc-shaped strip to rotate, when the rotating speed of the arc-shaped strip is smaller, the centrifugal block is less under the action of centrifugal force, the arc-shaped strip and the fixed shaft disc are still in a clamping state, and the arc-shaped strip can drive the fixed shaft disc to rotate; the fixed shaft disc drives the third fixed shaft to rotate, and the third fixed shaft rotates to drive the second sun gear to rotate through the second one-way ring; the second sun gear rotates to drive the second planet gear to rotate; the second planet wheel rotates to drive the inner gear ring to rotate; the inner gear ring drives the output shaft to rotate; namely, the input shaft rotates to drive the output shaft to rotate; when the arc-shaped strip moves at a high speed, the centrifugal block arranged in the arc-shaped strip moves towards the outer side of the arc-shaped strip under the action of centrifugal force, when the centrifugal block is contacted with the drum wheel in the moving process, the centrifugal block can rub against the drum wheel, the centrifugal block is separated from the arc-shaped strip at the moment, but the arc-shaped strip can be separated from the fixed shaft disc along with the increase of the speed, and the arc-shaped strip is combined with the centrifugal block; the arc-shaped strip drives the drum wheel to rotate through the friction between the centrifugal block and the drum wheel, and the drum wheel rotates to drive the Z-shaped wheel to rotate; the Z-shaped wheel rotates to drive the first sun wheel to rotate through the first one-way ring, and the first sun wheel rotates to drive the first planet wheel to rotate; the first planet wheel drives the inner gear ring to rotate; the inner gear ring drives the output shaft to rotate; at the moment, the arc-shaped strip is separated from the fixed shaft disc, so that the arc-shaped strip cannot drive the fixed shaft disc to rotate; that is, the rotation of the input shaft can drive the rotation of the output shaft.

Drawings

Fig. 1 is an appearance schematic diagram of the whole structure.

Fig. 2 is a schematic view of the overall internal structure.

Fig. 3 is a schematic diagram of the overall internal structural distribution.

Fig. 4 is an overall internal structure installation schematic.

Fig. 5 is a schematic diagram of the sun gear and planet gear engagement.

Fig. 6 is a third fixed shaft mounting schematic.

Fig. 7 is a schematic view of the drum engaging the arcuate strip.

Fig. 8 is a schematic view of the engagement of the drive plate with the arc-shaped bar.

FIG. 9 is a schematic diagram of a centrifugal block structure.

Fig. 10 is a schematic structural view of the first cylindrical pin and the second cylindrical pin.

FIG. 11 is a schematic diagram of a centrifugal tank structure.

Fig. 12 is a schematic view of the input shaft structure.

Fig. 13 is a schematic view of the structure of the extension spring.

Number designation 1, mounting plate in the figure; 2. a fixed cylinder; 3. a fixing ring; 4. an inner gear ring; 5. a drum; 6. an input shaft; 7. a Z-shaped ring; 8. a first unidirectional ring; 9. a first planet gear; 10. a second planet wheel; 11. a first fixed shaft; 12. a second fixed shaft; 13. an output shaft; 14. a first sun gear; 15. a second unidirectional ring; 16. fixing the shaft plate; 17. a second sun gear; 18. fixing the shaft disc; 19. a third fixed shaft; 20. a drive plate; 21. an arc-shaped strip; 22. a first cylindrical pin; 23. a second cylindrical pin; 24. a centrifugal block; 25. the centrifugal block fixes the spring; 26. a centrifugal tank; 27. an extension spring fixing column; 28. an extension spring; 29. a disc; 30. an input shaft support; 31. a fixed cylinder support; 32. the fixing ring supports; 33. a guide block; 34. and a guide block groove.

The specific implementation mode is as follows:

as shown in fig. 1 and 2, it includes a mounting plate 1, a fixed cylinder 2, a fixed ring 3, an inner gear ring 4, a drum 5, an input shaft 6, a Z-ring 7, a first unidirectional ring 8, a first planet wheel 9, a second planet wheel 10, a first fixed shaft 11, a second fixed shaft 12, an output shaft 13, a first sun wheel 14, a second unidirectional ring 15, a fixed shaft plate 16, a second sun wheel 17, a fixed shaft disc 18, a third fixed shaft 19, a drive plate 20, an arc-shaped bar 21, a first cylindrical pin 22, a second cylindrical pin 23, a centrifugal block 24, a centrifugal block fixing spring 25, a centrifugal groove 26, an extension spring fixing column 27, an extension spring 28, a disc 29, an input shaft support 30, a fixed cylinder support 31, a fixed ring support 32, a guide block 33, and a guide block groove 34, as shown in fig. 3, wherein the input shaft support 30, the fixed cylinder support 31 and the fixed ring support 32 are all mounted on the mounting plate 1, the fixed cylinder 2 is mounted on the, the drum wheel 5 and the Z-shaped ring 7 are fixedly arranged on the inner wall of the cylinder fixing cylinder, the fixing cylinder 2 is fixedly arranged on the mounting plate 1 through a fixing cylinder support 31, the drum wheel 5 is arranged on one side of the non-protruding surface of the Z-shaped ring 7 and is connected with one side of the drum wheel 5, and the outer circular surface of the Z-shaped ring 7 is arranged on the inner circular surface of the fixing cylinder 2; the input shaft 6 is mounted on the input shaft support 30, and one side of the driving plate 20 is mounted on the input shaft 6 at a middle position; as shown in fig. 12, a first cylindrical pin 22 is respectively installed at both ends of the other side of the driving plate 20; as shown in fig. 7 and 10, the drive plate 20 is respectively provided with two arc-shaped bars 21 through two first cylindrical pins 22, and for any one arc-shaped bar 21, the end which is not connected with the first cylindrical pin 22 is close to the first cylindrical pin 22 connected with the other arc-shaped bar 21; as shown in fig. 10 and 11, the mounting structure of each arc-shaped strip 21 is completely the same, and for any one of the arc-shaped strips, six centrifugal grooves 26 are uniformly and sequentially formed on the arc-shaped surface of the side, facing the drum 5, of the arc-shaped strip 21; the end of the arc-shaped strip 21 which is not connected with the second cylindrical pin 23 is provided with the second cylindrical pin 23; as shown in fig. 8, six centrifugal blocks 24 are respectively installed in six centrifugal grooves 26; as shown in fig. 9, a centrifugal block fixing spring 25 is installed between the bottom end of each centrifugal groove 26 and the corresponding centrifugal block 24; as shown in fig. 10, the second cylindrical pin 23 installed on one of the two arc-shaped bars 21 is engaged with the first cylindrical pin 22 connected to the other arc-shaped bar 21; as shown in fig. 10 and 13, an extension spring fixing column 27 is mounted on each of the first cylindrical pin 22 and the second cylindrical pin 23, and an extension spring 28 is mounted between two corresponding extension spring fixing columns 27 on the first cylindrical pin 22 and the second cylindrical pin 23 which are matched with each other; as shown in fig. 3, the fixing ring 3 is mounted on the fixing ring support 32; as shown in fig. 3 and 4, the ring gear 4 is mounted in the fixed ring 3 and can rotatably slide in the fixed ring 3, and the disc 29 is mounted on one side of the ring gear 4; as shown in fig. 4, the output shaft 13 is mounted on a disc 29; as shown in fig. 5, three first fixing shafts 11 are circumferentially and uniformly installed at one side of the fixing cylinder 2; the three first planet gears 9 are respectively arranged on the three first fixed shafts 11; the first sun gear 14 is mounted on the Z-shaped ring 7 through the first one-way ring 8; the first sun gear 14 is meshed with the three first planet gears 9, and all the three first planet gears 9 are meshed with the inner gear ring 4; as shown in fig. 5 and 6, the third fixed shaft 19 is installed in a circular hole at the center of the first sun gear 14 and can rotate in the circular hole of the first sun gear 14; as shown in fig. 6 and 7, the fixed shaft disc 18 is installed at one end of the third fixed shaft 19, and the outer circular surface of the fixed shaft disc 18 is matched with the inner circular surfaces of the two arc-shaped strips 21; as shown in fig. 5, the second sun gear 17 is mounted on the third fixed shaft 19 through the second one-way ring 15, and the diameter of the first sun gear 14 is twice the diameter of the second sun gear 17; the three second fixed shafts 12 are respectively installed at one ends of the three first fixed shafts 11 through three fixed shaft plates 16, the three second planet wheels 10 are respectively installed on the three second fixed shafts 12, the second sun wheel 17 is meshed with the three second planet wheels 10, and the three second planet wheels 10 are all meshed with the inner gear ring 4.

As shown in fig. 3, the fixed cylinder is welded to the mounting plate; the fixing ring is welded on the fixing ring support; the input shaft is axially welded to the mounting plate.

As shown in fig. 3, the fixing ring is welded to the mounting plate; the fixed cylinder is welded on the fixed cylinder support.

As shown in fig. 9, the centrifugal block fixing spring is an extension spring.

As shown in fig. 9 and 10, two guide blocks are symmetrically installed on two sides of the centrifugal block; two guide grooves are symmetrically formed in the two side faces of the centrifugal block groove; the centrifugal block is arranged in the centrifugal groove through the matching of the two guide blocks and the two guide grooves.

In summary, the following steps:

the invention designs the speed changer which can adjust two speeds, thereby achieving the purposes of rapidness and convenience, simple structure and better use effect.

In the present invention, the input shaft 6 is mounted on the input shaft support 30, and one side of the driving plate 20 is mounted on the input shaft 6 at a middle position; when the input shaft 6 rotates, the input shaft 6 rotates to drive the driving plate 20 to rotate around the axis of the input shaft 6; two ends of the other side of the driving plate 20 are respectively provided with a first cylindrical pin 22; the driving plate 20 is respectively provided with two arc-shaped strips 21 through two first cylindrical pins 22, and for any one arc-shaped strip 21, the end which is not connected with the first cylindrical pin 22 is close to the first cylindrical pin 22 connected with the other arc-shaped strip 21; the driving plate 20 rotates to drive the arc-shaped strips 21 to rotate, when the rotating speed of the arc-shaped strips 21 is low, the centrifugal block 24 is low in centrifugal force, the fixed shaft disc 18 is installed at one end of the third fixed shaft 19, the outer circular surface of the fixed shaft disc 18 is matched with the inner arc surfaces of the two arc-shaped strips 21, the arc-shaped strips 21 and the fixed shaft disc 18 are still in a clamping state, and the arc-shaped strips 21 can drive the fixed shaft disc 18 to rotate; the second sun gear 17 is mounted on a third fixed shaft 19 through a second one-way ring 15, the fixed shaft disc 18 drives the third fixed shaft 19 to rotate, and the third fixed shaft 19 rotates and drives the second sun gear 17 to rotate through the second one-way ring 15; the three second fixed shafts 12 are respectively installed at one ends of the three first fixed shafts 11 through three fixed shaft plates 16, the three second planet wheels 10 are respectively installed on the three second fixed shafts 12, the second sun wheel 17 is meshed with the three second planet wheels 10, and the three second planet wheels 10 are all meshed with the inner gear ring 4. The second sun gear 17 rotates to drive the second planet gear 10 to rotate; the inner gear ring 4 is arranged in the fixing ring 3 and can rotate and slide in the fixing ring 3, and the disc 29 is arranged on one side of the inner gear ring 4; the output shaft 13 is mounted on the disc 29; the second planet wheel 10 rotates to drive the inner gear ring 4 to rotate; the inner gear ring 4 drives the output shaft 13 to rotate.

In the present invention, the input shaft 6 is mounted on the input shaft support 30, and one side of the driving plate 20 is mounted on the input shaft 6 at a middle position; when the input shaft 6 rotates, the input shaft 6 rotates to drive the driving plate 20 to rotate around the axis of the input shaft 6, and two ends of the other side of the driving plate 20 are respectively provided with a first cylindrical pin 22; the driving plate 20 is respectively provided with two arc-shaped strips 21 through two first cylindrical pins 22, and for any one arc-shaped strip 21, the end which is not connected with the first cylindrical pin 22 is close to the first cylindrical pin 22 connected with the other arc-shaped strip 21; the driving plate 20 rotates to drive the arc-shaped strip 21 to rotate, and when the arc-shaped strip 21 moves at a high speed, six centrifugal grooves 26 are uniformly and sequentially formed in the arc-shaped surface of one side, facing the drum wheel 5, of the arc-shaped strip 21; six centrifugal blocks 24 are respectively installed in six centrifugal grooves 26; a centrifugal block fixing spring 25 is respectively arranged between the bottom end of each centrifugal groove 26 and the corresponding centrifugal block 24; the centrifugal block 24 installed in the arc-shaped strip 21 moves towards the outer side of the arc-shaped strip 21 under the action of centrifugal force, when the centrifugal block 24 is in contact with the drum wheel 5 in the moving process of the centrifugal block 24, the centrifugal block 24 can rub against the drum wheel 5, at the moment, the centrifugal block 24 is separated from the arc-shaped strip 21, but the arc-shaped strip 21 is separated from the fixed shaft disc 18 along with the increase of speed, and the arc-shaped strip 21 is internally matched with the centrifugal block 24; the drum wheel 5 and the Z-shaped ring 7 are fixedly arranged on the inner wall of the cylinder fixing cylinder, the fixing cylinder 2 is fixedly arranged on the mounting plate 1 through a fixing cylinder support 31, the drum wheel 5 is arranged on one side of the non-protruding surface of the Z-shaped ring 7 and is connected with one side of the drum wheel 5, and the outer circular surface of the Z-shaped ring 7 is arranged on the inner circular surface of the fixing cylinder 2; the arc-shaped strip 21 drives the drum wheel 5 to rotate through the friction between the centrifugal block 24 and the drum wheel 5, and the drum wheel 5 rotates to drive the Z-shaped wheel to rotate; the three first fixed shafts 11 are uniformly arranged on one side of the fixed cylinder 2 in the circumferential direction; the three first planet gears 9 are respectively arranged on the three first fixed shafts 11; the first sun gear 14 is mounted on the Z-shaped ring 7 through the first one-way ring 8; the first sun gear 14 is meshed with the three first planet gears 9, and all the three first planet gears 9 are meshed with the inner gear ring 4; the Z-shaped wheel rotates to drive the first sun wheel 14 to rotate through the first one-way ring 8, and the first sun wheel 14 rotates to drive the first planet wheel 9 to rotate; the inner gear ring 4 is arranged in the fixing ring 3 and can rotatably slide in the fixing ring 3, and the disc 29 is arranged on one side of the inner gear ring 4; the output shaft 13 is mounted on the disc 29; the first planet wheel 9 drives the inner gear ring 4 to rotate; the inner gear ring 4 drives the output shaft 13 to rotate; since the arc-shaped strip 21 is already disengaged from the fixed hub 18, the arc-shaped strip 21 does not rotate the fixed hub 18.

In the invention, when the first planet wheel 9 rotates to drive the inner gear ring 4 to rotate, the inner gear ring 4 can drive the second planet wheel 10 to rotate; the second planet wheel 10 rotates to drive the second sun wheel 17 to rotate; the second sun gear 17 cannot drive the third fixed shaft 19 to rotate under the action of the second one-way ring 15; namely, when the first planet wheel 9 rotates to drive the ring gear 4 to rotate, the third fixed shaft 19 does not influence the transmission of the driving plate 20; when the second planet wheel 10 rotates to drive the inner gear ring 4 to rotate, the inner gear ring 4 can drive the first planet wheel 9 to rotate; the rotation of the first planet wheel 9 drives the first sun wheel 14 to rotate; the first sun wheel 14 cannot drive the Z-shaped wheel to rotate under the action of the first one-way ring 8; i.e. the Z-shaped wheel does not influence the rotation of the drum wheel 5 when the second planet wheel 10 rotates to drive the inner gear ring 4 to rotate.

In the invention, the drum and the fixing ring 3 are respectively and fixedly arranged on the fixing drum support 31 and the fixing ring support 32, so that the movement stability of the drum wheel 5, the Z-shaped ring 7 and the inner gear ring 4 can be ensured, and the effect of balancing and rotating the drum wheel 5, the Z-shaped ring 7 and the inner gear ring 4 is achieved. The fixed cylinder 2 of the present invention supports the drum 5 and the Z-ring 7.

A specific embodiment; when people use the transmission designed by the invention, when the input shaft 6 rotates, the input shaft 6 rotates to drive the driving plate 20 to rotate around the axis of the input shaft 6, the driving plate 20 rotates to drive the arc-shaped strip 21 to rotate, when the rotating speed of the arc-shaped strip 21 is small, the centrifugal block 24 is slightly influenced by centrifugal force, the arc-shaped strip 21 and the fixed shaft disc 18 are still in a clamping state, and the arc-shaped strip 21 can drive the fixed shaft disc 18 to rotate; the fixed shaft disc 18 drives the third fixed shaft 19 to rotate, and the third fixed shaft 19 rotates to drive the second sun gear 17 to rotate through the second one-way ring 15; the second sun gear 17 rotates to drive the second planet gear 10 to rotate; the second planet wheel 10 rotates to drive the inner gear ring 4 to rotate; the inner gear ring 4 drives the output shaft 13 to rotate; namely, the input shaft 6 can drive the output shaft 13 to rotate; when the arc-shaped strip 21 moves at a high speed, the centrifugal block 24 arranged in the arc-shaped strip 21 moves towards the outer side of the arc-shaped strip 21 under the action of centrifugal force, when the centrifugal block 24 is in contact with the drum wheel 5 in the moving process of the centrifugal block 24, the centrifugal block 24 can rub against the drum wheel 5, at the moment, the centrifugal block 24 is separated from the arc-shaped strip 21, but the arc-shaped strip 21 is separated from the fixed shaft disc 18 along with the increase of the speed, and the arc-shaped strip 21 is internally matched with the centrifugal block 24; the arc-shaped strip 21 drives the drum wheel 5 to rotate through the friction between the centrifugal block 24 and the drum wheel 5, and the drum wheel 5 rotates to drive the Z-shaped wheel to rotate; the Z-shaped wheel rotates to drive the first sun wheel 14 to rotate through the first one-way ring 8, and the first sun wheel 14 rotates to drive the first planet wheel 9 to rotate; the first planet wheel 9 drives the inner gear ring 4 to rotate; the inner gear ring 4 drives the output shaft 13 to rotate; since the arc-shaped strip 21 is separated from the fixed shaft disc 18 at this time, the arc-shaped strip 21 cannot drive the fixed shaft disc 18 to rotate; i.e. the rotation of the input shaft 6 may cause the rotation of the output shaft 13.

Claims

1. The utility model provides a speed changer, it includes input shaft, output shaft, first planet wheel, second planet wheel, first sun gear, second sun gear, centrifugal block, its characterized in that: the device comprises a mounting plate, a fixed cylinder, a fixed ring, an inner gear ring, a drum wheel, a Z-shaped ring, a first one-way ring, a first fixed shaft, a second one-way ring, a fixed shaft plate, a fixed shaft disc, a third fixed shaft, a driving plate, an arc strip, a first cylindrical pin, a second cylindrical pin, a centrifugal block fixing spring, a centrifugal groove, an extension spring fixing column, an extension spring, a disc, an input shaft support, a fixed cylinder support, a fixed ring support, a guide block and a guide block groove, wherein the input shaft support, the fixed cylinder support and the fixed ring support are all mounted on the mounting plate; the input shaft is mounted on the input shaft support, one side of the driving plate is mounted on the input shaft, and the connecting position of the driving plate and the input shaft is positioned in the middle of the driving plate; two ends of the other side of the driving plate are respectively provided with a first cylindrical pin; the driving plate is respectively provided with two arc-shaped strips through two first cylindrical pins, and for any one arc-shaped strip, one end which is not connected with the first cylindrical pin is close to the first cylindrical pin connected with the other arc-shaped strip;

the mounting structure on each arc-shaped strip is completely the same, and for any one of the arc-shaped strips, six centrifugal grooves are uniformly formed in the arc-shaped surface of one side, facing the drum wheel, of the arc-shaped strip; one end of the arc-shaped strip, which is not connected with the second cylindrical pin, is provided with the second cylindrical pin; the six centrifugal blocks are respectively arranged in the six centrifugal grooves; a centrifugal block fixing spring is respectively arranged between the bottom end of each centrifugal groove and the corresponding centrifugal block; a second cylindrical pin arranged on one of the two arc-shaped strips is matched with a first cylindrical pin connected with the other arc-shaped strip;

an extension spring fixing column is arranged on each of the first cylindrical pin and the second cylindrical pin, and an extension spring is arranged between two corresponding extension spring fixing columns on the first cylindrical pin and the second cylindrical pin which are matched with each other; the fixing ring is arranged on the fixing ring support; the inner gear ring is arranged in the fixed ring and can rotate and slide in the fixed ring, and the disc is arranged on one side of the inner gear ring; the output shaft is arranged on the disc; the three first fixed shafts are circumferentially and uniformly arranged on one side of the fixed cylinder; the three first planet wheels are respectively arranged on the three first fixed shafts; the first sun gear is arranged on the Z-shaped ring through a first one-way ring; the first sun gear is meshed with the three first planet gears which are all meshed with the inner gear ring; the third fixed shaft is arranged in a circular hole in the center of the first sun gear and can rotate in the circular hole of the first sun gear; the fixed shaft disc is arranged at one end of the third fixed shaft, and the outer circular surface of the fixed shaft disc is matched with the inner arc surfaces of the two arc strips; the second sun gear is arranged on the third fixed shaft through a second one-way ring, and the diameter of the first sun gear is twice of that of the second sun gear; the three second fixed shafts are respectively arranged at one ends of the three first fixed shafts through three fixed shaft plates, the three second planet wheels are respectively arranged on the three second fixed shafts, the second sun wheel is meshed with the three second planet wheels, and the three second planet wheels are all meshed with the inner gear ring;

the fixed cylinder is supported and welded on the mounting plate; the fixing ring is welded on the fixing ring support; the input shaft is supported and welded on the mounting plate;

the fixing ring is supported and welded on the mounting plate; the fixed cylinder is welded on the fixed cylinder support.

2. A transmission as claimed in claim 1, wherein: the centrifugal block fixing spring is an extension spring.

3. A transmission as claimed in claim 1, wherein: two guide blocks are symmetrically arranged on two sides of the centrifugal block; two guide grooves are symmetrically formed in the two side faces of the centrifugal block groove; the centrifugal block is arranged in the centrifugal groove through the matching of the two guide blocks and the two guide grooves.