CN110608273B

CN110608273B - Speed changing device

Info

Publication number: CN110608273B
Application number: CN201810623765.9A
Authority: CN
Inventors: 吴丹凤
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-06-15
Filing date: 2018-06-15
Publication date: 2022-08-05
Anticipated expiration: 2038-06-15
Also published as: CN110608273A

Abstract

The invention discloses a speed change device, relates to the field of transmission devices, and aims to solve the problem that the smoothness of gear shifting and speed changing of a traditional infinitely variable speed star wheel transmission device is poor. The technical scheme is characterized by comprising a plurality of transmission balls, an input ring and an output ring which are linked with the transmission balls, a positioning shaft which enables the transmission balls to rotate around the transmission balls, and an adjusting ring which is used for controlling the positioning shaft to swing. The two ends of the positioning shaft are respectively connected with a first fixed ring and a second fixed ring which cover the transmission ball in the positioning shaft, and the first fixed ring and the second fixed ring are respectively provided with a sliding hole and a sliding groove which are used for swinging the positioning shaft. The adjustable ring is embedded in the inner periphery of the first fixed ring, and the outer wall of the adjustable ring is provided with a curved adjusting groove. One end of the positioning shaft is embedded into the sliding groove, the other end of the positioning shaft penetrates through the sliding hole to be embedded into the adjusting groove, and the adjusting ring can control the positioning shaft to swing. The invention achieves the effect of improving the speed change smoothness.

Description

Speed changing device

Technical Field

The present invention relates to the field of transmissions, and more particularly, it relates to a transmission.

Background

The speed change device is suitable for various fields of mechanical equipment, bicycles, electric vehicles, automobiles and the like, wherein the speed of the bicycle speed change transmission device is changed by changing the matching of a chain and gear discs with different front and rear sizes.

The infinitely variable star transmission eliminates the traditional shifting of the chain from one gear to another, and is shifted by two rotating discs and a set of balls between them.

Fig. 1 is a schematic diagram of a speed change principle of a continuously variable star wheel transmission, which includes a pillar 101, wherein the pillar 101 is symmetrically provided with struts 102, a rotating shaft 103 is connected between the two struts 102, the rotating shaft 103 is sleeved with a rolling ball 104, and an input disc 105 and an output disc 106 are symmetrically arranged on two sides of the rolling ball 104; when the speed is changed, the positions of the input disc 105, the rolling ball 104 and the output disc 106 are fixed, and the rotating shaft 103 swings along with the movement of the support 101; after the rotating shaft 103 swings, the rotating speed ratio of the input disc 105 and the output disc 106 changes, so that the transmission ratio of the infinitely variable star wheel transmission device can be changed, and further speed change is realized.

In the above scheme, the movement of the strut 101 is defined as a control track, and the swing amplitude of the rotating shaft 103 is defined as a speed regulation stroke. However, the vector directions of the control track and the speed regulation stroke are the same, and the scalar is small, so that the speed regulation stroke is adjusted quickly, and the smoothness of gear shifting and speed changing is poor.

Disclosure of Invention

In view of the disadvantages of the prior art, it is an object of the present invention to provide a transmission device having an advantage of improving shift smoothness.

In order to achieve the purpose, the invention provides the following technical scheme:

a speed change device comprises a plurality of transmission balls, an input ring and an output ring which are linked with the transmission balls, a positioning shaft which enables the transmission balls to rotate around the positioning shaft, and an adjusting ring which is used for controlling the positioning shaft to swing, wherein two ends of the positioning shaft are respectively connected with a first fixed ring and a second fixed ring which cover the transmission balls in the positioning shaft, and the first fixed ring and the second fixed ring are respectively provided with a sliding hole and a sliding groove which are used for the positioning shaft to swing;

the adjusting ring is embedded in the inner periphery of the first fixed ring, and the outer wall of the adjusting ring is provided with a curved adjusting groove; one end of the positioning shaft is embedded into the sliding groove, the other end of the positioning shaft penetrates through the sliding hole to be embedded into the adjusting groove, and the adjusting ring can control the positioning shaft to swing.

By adopting the technical scheme, the matching of the sliding hole and the sliding groove limits the swing direction of the positioning shaft, so that the stable transmission among the transmission ball, the input ring and the output ring can be maintained; the adjusting ring is rotated, the positioning shaft swings under the driving action of the adjusting groove, and the adjusting groove forms a control track of the positioning shaft; the adjusting groove is in a curve shape, the control track scalar quantity of the positioning shaft is obviously increased, and the smoothness of speed change can be further improved under the condition of the same speed regulation stroke.

Further, a planetary gear assembly is connected to the adjustment ring for controlling rotation thereof.

By adopting the technical scheme, the planetary gear assembly has a speed change function, and the rotation of the adjusting ring is controlled by the planetary gear assembly, so that the sensitivity of speed regulation control can be reduced, the speed regulation control is easier, and the smoothness of speed change can be improved.

Furthermore, the planetary gear assembly includes the ring gear of being connected with the adjustable ring, set up sun gear and a plurality of simultaneously with ring gear and sun gear meshing's planetary gear in the ring gear, be provided with a plurality of fixed axles that pass planetary gear on the adjustable ring.

Through adopting above-mentioned technical scheme, sun gear rotates and drives planetary gear and rotate, and planetary gear rotates and drives the rotation of gear circle, and the gear circle is connected with the adjustable ring, and then can control the adjustable ring and rotate.

Further, the one end that the adjustable ring was kept away from to sun gear extends and is provided with the regulating spindle, the one end that sun gear was kept away from to the regulating spindle is connected with the adjusting part.

Through adopting above-mentioned technical scheme, the adjusting part passes through the regulating spindle and is connected with sun gear, then can control the rotation of adjustable ring through the adjusting part, and then realizes the variable speed.

Further, the adjusting component comprises a driven shifting plate connected with the adjusting shaft and a driving shifting plate capable of controlling the driven shifting plate to rotate.

By adopting the technical scheme, the driven shifting plate is connected with the adjusting shaft, and the driven shifting plate is controlled to rotate by actively shifting the plate, so that the rotation of the adjusting ring can be controlled, and the speed change is realized.

Furthermore, the driven shifting plate comprises a driven ring sleeved on the adjusting shaft, a driven support plate connected with the outer side wall of the driven ring and a driven clamping plate vertically connected with the driven support plate, and the driving shifting plate comprises a driving ring, a driving support plate connected with the outer side wall of the driving ring and a driving clamping plate vertically connected with the driving support plate.

Through adopting above-mentioned technical scheme, rotate the initiative ring, make initiative cardboard and driven cardboard butt, then can control the driven ring and rotate, the driven ring cover is established on the regulating spindle, and then can control the regulating spindle and rotate to the rotation of control adjustable ring realizes the variable speed.

Furthermore, a driving support ring is arranged on the end face of the driving ring opposite to the driven ring, adjusting ropes in contact with the driving support ring are fixedly arranged in the middle of the driven clamping plate in a penetrating mode, and driving rope holes for allowing the adjusting ropes to penetrate through are symmetrically formed in the driving clamping plate.

Through adopting above-mentioned technical scheme, the initiative ring is fixed, and the rope is adjusted in the pulling, can control driven cardboard and rotate, and then can control the regulating spindle and rotate to control the adjustable ring and rotate, realize the variable speed.

Furthermore, the end, far away from the initiative ring, of the initiative braced ring is connected with an initiative snap ring, an initiative annular groove which plays a limiting role in the adjusting rope is formed between the initiative snap ring and the initiative ring.

Through adopting above-mentioned technical scheme, the initiative ring groove plays spacing and guide effect to the regulation rope, and then can conveniently stimulate the regulation rope and control the adjustable ring and rotate to realize the variable speed.

Furthermore, a centering bearing is sleeved on the positioning shaft, and a centering hole matched with the centering bearing is formed in the middle of the transmission ball.

By adopting the technical scheme, on one hand, the centering bearing can reduce the friction force between the transmission ball and the positioning shaft, thereby prolonging the service life of the transmission ball; on the other hand can increase the stability of location axle and transmission ball linkage, and then can conveniently adjust the rotation axis direction of transmission ball through the swing of control location axle to realize the variable speed.

Furthermore, the edges at the openings at the two ends of the centering hole are arranged in a chamfer manner.

Through adopting above-mentioned technical scheme, the chamfer setting can conveniently be downthehole with centering bearing embedding centering.

In conclusion, the invention has the following beneficial effects:

1. the adjusting groove, the sliding hole and the sliding groove are adopted, so that the effect of improving the speed change smoothness is achieved;

2. the adjusting component and the planetary gear component are adopted, so that the effect of conveniently adjusting the speed change is achieved;

3. the centering bearing and the centering hole are adopted, so that the effect of improving the linkage stability of the positioning shaft and the transmission ball is achieved.

Drawings

FIG. 1 is a schematic diagram of a shifting principle of a continuously variable planetary transmission in the background art;

FIG. 2 is an exploded view of the adjusting ring, the first stationary ring, the second stationary ring, the drive ball and the positioning shaft of the embodiment;

FIG. 3 is an exploded schematic view of the planetary gear assembly, adjustment ring, first stationary ring and second stationary ring of the embodiment;

FIG. 4 is a schematic structural diagram of an adjusting ring and a gear ring in the embodiment;

FIG. 5 is a sectional view of an adjusting ring, a first stationary ring, a drive ball and a second stationary ring in the embodiment;

FIG. 6 is a schematic structural diagram of an adjusting assembly and an adjusting shaft in the embodiment;

FIG. 7 is a sectional view of the transmission in the embodiment;

FIG. 8 is a schematic structural view of an embodiment of an output ring, ratchet assembly and first collar;

FIG. 9 is an exploded schematic view of an input ring, input snap ring and input sleeve according to an embodiment;

fig. 10 is a schematic view of the overall structure of the transmission in the embodiment.

In the figure: 1. a drive ball; 11. positioning the shaft; 12. a centering bearing; 13. a centering hole; 14. a main shaft; 141. a second ladder loop; 142. a limiting surface; 15. a positioning ring; 151. a second inclined surface; 152. a second planar bearing; 2. a first stationary ring; 21. a first ball groove; 22. a first protrusion; 23. a sliding hole; 24. a first bump; 25. a first limit ring; 26. fixing grooves; 3. a second stationary ring; 31. a second ball groove; 32. a second protrusion; 33. a sliding groove; 34. a third protrusion; 35. a second ring groove; 36. a second groove; 37. a second stop collar; 38. a second auxiliary ring; 39. a fixing pin; 4. an adjusting ring; 41. an adjustment groove; 42. a fixed shaft; 43. a second weight-reducing slot; 44. a third auxiliary ring; 45. a fourth protrusion; 5. an input loop; 51. inputting a snap ring; 511. inputting a branch ring; 512. inputting a clamping block; 513. a limiting block; 52. an input shaft sleeve; 521. a limiting groove; 522. inputting an outer ring; 523. a first planar bearing; 524. an inner ring of the shaft sleeve; 53. inputting a flywheel; 54. an input card slot; 6. an output ring; 61. a first inclined surface; 62. an output auxiliary loop; 63. outputting steel balls; 7. a planetary gear assembly; 71. a gear ring; 72. a sun gear; 73. a planetary gear; 74. an adjustment shaft; 741. a gear spline; 8. an adjustment assembly; 81. actively dialing a plate; 811. a driving ring; 812. an active support plate; 813. a driving clamping plate; 814. an active branch ring; 815. an active snap ring; 816. a driving ring groove; 817. a first weight-reducing slot; 818. a driving rope hole; 82. a driven shifting plate; 821. a driven ring; 822. a driven support plate; 823. a driven pallet; 824. a driven rope hole; 825. adjusting the rope; 826. a splined bore; 9. an output sleeve; 91. a first collar; 911. a traction ring; 912. a drawing hole; 92. a first closed loop; 921. a first framework oil seal ring; 93. a second closed loop; 931. a fourth auxiliary ring; 932. a fifth auxiliary ring; 933. a second framework oil seal ring; 941. a ratchet block; 942. a ratchet groove; 943. a first card slot; 944. a second card slot; 945. a third card slot; 946. an elastic sheet; 947. a ratchet; 101. a pillar; 102. a strut; 103. a rotating shaft; 104. rolling a ball; 105. an input disc; 106. and an output tray.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Example (b):

a speed change gear, refer to fig. 2, it includes the basic shaft 14, the basic shaft 14 is fitted with the first stationary ring 2 and second stationary ring 3 and inlays the adjustable ring 4 set in the first stationary ring 2 inner periphery; the first fixed ring 2 is fixedly connected with the second fixed ring 3, the second fixed ring 3 is fixedly connected with the main shaft 14, and the adjusting ring 4 is rotatably connected with the main shaft 14.

Referring to fig. 2, a plurality of transmission balls 1 are embedded between the first fixed ring 2 and the second fixed ring 3, the number of the transmission balls 1 is at least 3, and the number of the transmission balls 1 is 6 in this embodiment, so that the stability of transmission can be ensured; a positioning shaft 11 penetrates through the middle of the transmission ball 1, a centering bearing 12 is sleeved on the positioning shaft 11, and a centering hole 13 matched with the centering bearing 12 is formed in the middle of the transmission ball 1; in the embodiment, the centering bearing 12 only comprises a retainer and rollers, the positioning shaft 11 is equivalent to a bearing inner ring, and the transmission ball 1 is equivalent to a bearing outer ring, so that the transmission ball 1 can stably rotate around the positioning shaft 11.

Referring to fig. 2, the outer wall of the first retainer ring 2 is provided with a first ball groove 21 which is matched with the transmission ball 1 in an inward concave manner, and the inner wall thereof forms a first protrusion 22 (refer to fig. 3) opposite to the first ball groove 21; the end wall of the second stationary ring 3 opposite to the drive ball 1 is recessed to the side far away from the drive ball 1 to form a second ball groove 31 matched with the drive ball 1, and then the end wall far away from the drive ball 1 forms a second protrusion 32 opposite to the second ball groove 31.

Referring to fig. 2, a sliding hole 23 matched with the positioning shaft 11 is formed in the middle of the first ball groove 21, a sliding groove 33 matched with the positioning shaft 11 is concavely formed on one side of the second ball groove 31 far away from the transmission ball 1, and a third protrusion 34 opposite to the sliding groove 33 is formed on the second protrusion 32; the sliding hole 23 and the sliding groove 33 are arranged oppositely, one end of the positioning shaft 11 is embedded into the sliding groove 33, the other end of the positioning shaft 11 penetrates through the sliding hole 23, the positioning shaft 11 can swing along the directions of the sliding hole 23 and the sliding groove 33, and the swing axial direction of the positioning shaft 11 is perpendicular to the axial direction of the main shaft 14.

Referring to fig. 2, the adjusting ring 4 is embedded in the inner periphery of the first fixed ring 2 and can rotate relative to the first fixed ring 2, and the outer wall of the adjusting ring 4 is a spherical surface matched with the first protrusion 22 (see fig. 3); a plurality of adjusting grooves 41 matched with the positioning shaft 11 are uniformly formed in the outer wall of the adjusting ring 4, and one end, far away from the sliding groove 33, of the positioning shaft 11 penetrates through the sliding hole 23 and is embedded into the adjusting grooves 41; the adjusting groove 41 is in a spiral curve shape, and the positioning shaft 11 swings along the directions of the sliding hole 23 and the sliding groove 33 by driving the adjusting ring 4 through rotation of the adjusting groove 41.

Referring to fig. 3, the second annular groove 35 matched with the first fixed ring 2 is provided on the end face of the second fixed ring 3 opposite to the first fixed ring 2, and the outer wall part of the first fixed ring 2 embedded into the second annular groove 35 and the side wall of the second annular groove 35 are both obliquely arranged, so that the first fixed ring 2 can be conveniently embedded into the second annular groove 35.

Referring to fig. 3, six first protruding blocks 24 are uniformly arranged on the end faces of the first fixed ring 2 opposite to the second fixed ring 3, and the sliding holes 23 extend into the first protruding blocks 24; a second groove 36 matched with the first bump 24 is formed in the second ring groove 35, and one end, away from the first stationary ring 2, of the first bump 24 is arranged in a fillet manner, so that the first bump 24 can be conveniently embedded into the second groove 36.

Referring to fig. 3, the second ring groove 35 is communicated with the second ball groove 31, and six fixing pins 39 are uniformly and convexly arranged in the second ring groove 35; the fixed slot 26 (refer to fig. 2) of the interference fit with the fixed pin 39 is seted up to the relative terminal surface of first stationary ring 2 and second stationary ring 3, and the fixed pin 39 is kept away from the one end of second stationary ring 3 and the fixed slot 26 (refer to fig. 2) open end and all is the chamfer setting, and then can conveniently imbed the fixed pin 39 in the fixed slot 26 (refer to fig. 2).

Referring to fig. 3, one end of the adjusting ring 4, which is far away from the first fixed ring 2, is connected with a planetary gear assembly 7, the planetary gear assembly 7 comprises a gear ring 71 connected with the adjusting ring 4, a sun gear 72 arranged in the middle of the gear ring 71, and a plurality of planetary gears 73 which are wound around the sun gear 72 and meshed with the gear ring 71, wherein the number of the planetary gears 73 is 3 in the embodiment; the sun gear 72 is sleeved on the main shaft 14, and an adjusting shaft 74 is extended from one end of the main shaft away from the first fixed ring 2.

Referring to fig. 3 and 4, three fixed shafts 42 are uniformly and extendedly arranged on the inner wall of the adjusting ring 4, the planetary gears 73 are sleeved on the fixed shafts 42, and the fixed shafts 42 are step-shaped, so that the relative positions of the planetary gears 73, the gear ring 71 and the sun gear 72 can be conveniently limited; in the embodiment, the middle of the fixed shaft 42 is provided with a second weight-reducing groove 43, so that the weight of the adjusting ring 4 can be reduced; the inner wall of the adjusting ring 4 is provided with a fourth protrusion 45 opposite to the adjusting groove 41.

Referring to fig. 5, one end of the first stationary ring 2, which is located at the first protrusion 24, extends inward to form a first limit ring 25 which is sleeved on the main shaft 14, one end of the second stationary ring 3, which is located at the second groove 36, extends inward to form a second limit ring 37 which is sleeved on the main shaft 14, and a second stepped ring 141 which is in interference fit with the second limit ring 37 is protruded from the main shaft 14; in this embodiment, the second ladder ring 141 is symmetrically provided with the stopper surfaces 142 (see fig. 3), so that the second stationary ring 3 can be prevented from rotating with respect to the main shaft 14.

Referring to fig. 5, one end of the second limiting ring 37, which is far away from the first limiting ring 25, is provided with a second auxiliary ring 38, which is sleeved on the second ladder ring 141, in a protruding manner, so that the stability of the connection between the second fixed ring 3 and the main shaft 14 can be improved; in this embodiment, the adjusting ring 4 is in contact with the first limit ring 25, the first limit ring 25 is in contact with the second stepped ring 141 and the second limit ring 37, and the second limit ring 37 is fixedly connected with the second stepped ring 141, so that the relative positions of the adjusting ring 4, the first fixed ring 2 and the second fixed ring 3 along the axial direction of the main shaft 14 are fixed; in this embodiment, a third auxiliary ring 44 (refer to fig. 4) sleeved on the main shaft 14 is disposed in the middle of the adjusting ring 4 and extends in a direction away from the first limiting ring 25, so as to increase the stability of the connection between the adjusting ring 4 and the main shaft 14.

Referring to fig. 5, both ends of the positioning shaft 11 are hemispherical, and the inner walls of the sliding groove 33 and the adjusting groove 41 are matched with the end of the positioning shaft 11, so that the friction force applied to the positioning shaft 11 during swinging can be reduced; the openings at two ends of the centering hole 13 on the transmission ball 1 are all arranged in a round angle mode, and then the centering bearing 12 can be conveniently embedded into the centering hole 13.

Referring to fig. 6, an end of the adjusting shaft 74 far from the sun gear 72 is connected to an adjusting assembly 8, and the adjusting assembly 8 includes a driven dial plate 82 connected to the adjusting shaft 74 and a driving dial plate 81 connected to the main shaft 14 (see fig. 5); the driven shifting plate 82 comprises a driven ring 821 sleeved on the adjusting shaft 74, a driven support plate 822 connected with the outer wall of the driven ring 821 and a driven clamping plate 823 vertically connected with the driven support plate 822; in this embodiment, a gear spline 741 is disposed on an outer wall of the adjusting shaft 74, a spline hole 826 matched with the gear spline 741 is formed in the middle of the driven ring 821, and the matching of the gear spline 741 and the spline hole 826 can increase the connection stability between the driven ring 821 and the adjusting shaft 74 and prolong the service life of the driven ring 821.

Referring to fig. 6, the driving plate 81 includes a driving ring 811 fixedly fitted on the main shaft 14 (see fig. 5), a driving support 812 connected to an outer wall of the driving ring 811, and a driving plate 813 vertically connected to the driving support 812, in this embodiment, a first weight-reducing slot 817 is formed in the middle of the driving plate 813, so as to reduce the weight of the driving plate 81.

Referring to fig. 6, a driven rope hole 824 is formed in the driven clamping plate 823, an adjusting rope 825 penetrates through the driven rope hole 824, and the adjusting rope 825 and the driven clamping plate 823 are fastened through a machine-meter screw (not shown in the drawing); active rope holes 818 for allowing the adjusting ropes 825 to penetrate through are symmetrically formed in the active clamping plate 813 at two sides of the first weight-reducing groove 817; a driving branch ring 814 contacting with the adjusting rope 825 is convexly arranged on the end surface of the driving ring 811 opposite to the driven ring 821, and a driving snap ring 815 is arranged at one end of the driving branch ring 814 far away from the driving ring 811; the outer diameters of the driving ring 811 and the driving snap ring 815 are larger than the outer diameter of the driving branch ring 814, so that a driving ring groove 816 for embedding the adjusting rope 825 is formed between the driving ring 811 and the driving snap ring 815.

Referring to fig. 7, the transmission further includes an input ring 5 and an output ring 6 linked with the transmission ball 1, the input ring 5 and the output ring 6 are disposed in parallel on the same side of the transmission ball 1 in this embodiment; when the axis of the positioning shaft 11 is vertical to the axis of the main shaft 14, the initial state of the speed changing device is achieved, and at the moment, the input ring 5 is in contact with the position of the maximum rotating radius of the transmission ball 1; the output ring 6 is provided with a first inclined surface 61 which is in contact with the drive ball 1, so that in an initial state, the output ring 6 is in contact with the minimum rotation radius of the drive ball 1, the minimum rotation radius is the minimum rotation radius which can be reached by the output ring 6, and the minimum rotation radius is infinitely close to the theoretical minimum rotation radius of the drive ball 1.

Referring to fig. 7, an input snap ring 51 is connected to one end of the input ring 5 away from the transmission ball 1, an input shaft sleeve 52 penetrates through the input snap ring 51, and an input flywheel 53 is fixedly sleeved on one end of the input shaft sleeve 52 away from the input snap ring 51; in the embodiment, power input is realized through the chain and the input flywheel 53, and the power input can also be realized through synchronous belts and other modes; two bearings sleeved on the adjusting shaft 74 are embedded in the inner wall of the input shaft sleeve 52, and a shaft sleeve inner ring 524 located between the two bearings is arranged on the inner wall of the input shaft sleeve 52, so that the positions of the bearings can be conveniently limited.

Referring to fig. 7, the outer wall of the output ring 6 is connected with an output sleeve 9, and the output sleeve 9 covers the first fixed ring 2, the transmission balls 1, the second fixed ring 3, the input ring 5 and the output ring 6; the output sleeve 9 comprises a first sleeve ring 91 and a first closed loop 92 and a second closed loop 93 which are respectively connected with two ends of the first sleeve ring 91; two traction rings 911 are symmetrically arranged on the outer wall of the first lantern ring 91, and a plurality of traction holes 912 are uniformly distributed on the traction rings 911; in this embodiment, the power output is realized by connecting the traction ring 911 with the spokes, and the power output can also be realized by means of gear transmission or synchronous belt transmission.

Referring to fig. 7, the first closed loop 92 is sleeved on the input shaft sleeve 52, and an inner hole of the first closed loop 92 is step-shaped; a bearing sleeved on the input shaft sleeve 52 and a first framework oil seal ring 921 are embedded in an inner hole of the first closed loop 92, and an input outer ring 522 used for limiting the bearing is arranged on the outer wall of the input shaft sleeve 52; in this embodiment, a first plane bearing 523 is disposed between the first closed loop 92 and the input snap ring 51, so as to axially position the input ring 5, thereby increasing the stability of the linkage between the input ring 5 and the transmission ball 1.

Referring to fig. 7, in this embodiment, an output auxiliary ring 62 is disposed at one end of the output ring 6 away from the transmission ball 1, a plurality of output steel balls 63 are uniformly embedded between the output auxiliary ring 62 and the output ring 6, the output steel balls 63 are embedded in an output framework (not shown in this figure), the output framework is fixedly sleeved on the input ring 5, and then the output ring 6, the output framework, the output steel balls 63 and the output ring 6 form a plane bearing, so that an axial limiting effect on the output ring 6 can be increased.

Referring to fig. 7, a positioning ring 15 is arranged on one side of the transmission ball 1 away from the input ring 5, a second inclined surface 151 in contact with the transmission ball 1 is arranged on the positioning ring 15, and the input ring 5, the output ring 6 and the positioning ring 15 form three-point support for the transmission ball 1, so that the stability of the transmission ball 1 can be improved; a second plane bearing 152 is arranged between the positioning ring 15 and the second closed loop 93, so as to limit the axial position of the positioning ring 15.

Referring to fig. 7, a fourth auxiliary ring 931 is arranged at an inner hole of the second closed loop 93 and extends inwards, and a bearing and a second framework oil seal ring 933 sleeved on the main shaft 14 are embedded in the inner wall of the fourth auxiliary ring 931; the inner wall of the fourth auxiliary ring 931 is provided with a fifth auxiliary ring 932 positioned between the bearing and the second framework oil seal ring 933, and the fifth auxiliary ring 932 is matched with the second ladder ring 141 to play an axial positioning role in the bearing and the second framework oil seal ring 933.

Referring to fig. 8, the output ring 6 is connected with the first collar 91 through a plurality of ratchet assemblies; the ratchet subassembly includes the ratchet piece 941 with first lantern ring 91 inner wall fixed connection, has seted up first draw-in groove 943 and second draw-in groove 944 and has been located third draw-in groove 945 between first draw-in groove 943 and the second draw-in groove 944 on the ratchet piece 941 respectively, and third draw-in groove 945 all is the intercommunication setting with first draw-in groove 943 and second draw-in groove 944.

Referring to fig. 8, an elastic sheet 946 is embedded in the first locking groove 943, and a ratchet 947 contacting with the elastic sheet 946 is embedded in the second locking groove 944; the outer wall of the output ring 6 is provided with a ratchet groove 942 matched with the ratchet 947, the ratchet groove 942 is triangular in the embodiment, the end part of the ratchet 947 is contacted with the short side of the triangle, and the side wall of the ratchet 947 is contacted with the long side of the triangle; the ratchet 947 is embedded into the ratchet groove 942 under the elastic pressing action of the elastic sheet 946, and when the rotation direction of the output ring 6 is the same as the output direction of the first collar 91, the ratchet groove 942 applies thrust to the end of the ratchet 947, so that the first collar 91 can be pushed to rotate, and power output is realized; when the rotation direction of the output ring 6 is opposite to the output direction of the first collar 91, the ratchet grooves 942 apply a pushing force to the side walls of the ratchet 947, so that the ratchet 947 overcomes the biasing action of the elastic pieces 946 to be inserted into the third clamping grooves 945, and the first collar 91 cannot be pushed to rotate, and power output cannot be realized.

Referring to fig. 9, the input snap ring 51 includes an input branch ring 511 sleeved on the input shaft sleeve 52 and a plurality of limiting blocks 513 uniformly arranged on the outer wall of the input branch ring 511, in this embodiment, the number of the limiting blocks 513 is 6, and an input slot 54 matched with the limiting blocks 513 is formed on the input ring 5; six input fixture blocks 512 are uniformly and convexly arranged on the inner wall of the input support ring 511, and the outer wall of the input shaft sleeve 52 is provided with a limit groove 521 matched with the input fixture blocks 512.

Referring to fig. 10, the input flywheel 53 and the adjustment assembly 8 are located outside the output housing 9, while the remaining components are located inside the output housing 9, the transmission is maintenance free.

The working principle is as follows:

the matching of the sliding hole 23 and the sliding groove 33 limits the swing direction of the positioning shaft 11, so that stable transmission between the transmission ball 1 and the input ring 5 and the output ring 6 can be maintained;

the adjusting ring 4 is controlled to rotate through the adjusting assembly 8 and the planetary gear assembly 7, the positioning shaft 11 swings under the driving action of the adjusting groove 41, and the adjusting groove 41 forms a control track of the positioning shaft 11; the adjusting groove 41 is in a curve shape, so that the control track scalar quantity of the positioning shaft 11 is obviously increased, and the smoothness of speed change can be further improved under the condition of the same speed regulation stroke.

Claims

1. A speed change device comprises a plurality of transmission balls (1), an input ring (5) and an output ring (6) which are linked with the transmission balls (1), a positioning shaft (11) which enables the transmission balls (1) to rotate around the positioning shaft and an adjusting ring (4) which is used for controlling the swinging of the positioning shaft (11), and is characterized in that: the two ends of the positioning shaft (11) are respectively connected with a first fixed ring (2) and a second fixed ring (3) which cover the transmission ball (1), and the first fixed ring (2) and the second fixed ring (3) are respectively provided with a sliding hole (23) and a sliding groove (33) which are used for swinging the positioning shaft (11); the adjusting ring (4) is embedded in the inner periphery of the first fixed ring (2), and the outer wall of the adjusting ring is provided with a curved adjusting groove (41); one end of the positioning shaft (11) is embedded into the sliding groove (33), the other end of the positioning shaft penetrates through the sliding hole (23) to be embedded into the adjusting groove (41), and the positioning shaft (11) can be controlled to swing by rotating the adjusting ring (4);

the adjusting ring (4) is connected with a planetary gear assembly (7) used for controlling the adjusting ring to rotate, the planetary gear assembly (7) is connected with an adjusting assembly (8), and the adjusting assembly (8) comprises a driven shifting plate (82) connected with an adjusting shaft (74) and a driving shifting plate (81) capable of controlling the driven shifting plate (82) to rotate;

the driven shifting plate (82) comprises a driven ring (821) sleeved on the adjusting shaft (74), a driven support plate (822) connected with the outer side wall of the driven ring (821) and a driven clamping plate (823) vertically connected with the driven support plate (822), and the driving shifting plate (81) comprises a driving ring (811), a driving support plate (812) connected with the outer side wall of the driving ring (811) and a driving clamping plate (813) vertically connected with the driving support plate (812);

the end face, opposite to the driven ring (821), of the driving ring (811) is provided with a driving branch ring (814), the middle of the driven clamping plate (823) is fixedly provided with an adjusting rope (825) in contact with the driving branch ring (814), and driving rope holes (818) for the adjusting rope (825) to penetrate through are symmetrically formed in the driving clamping plate (813).

2. The transmission device according to claim 1, characterized in that: the planetary gear assembly (7) comprises a gear ring (71) connected with the adjusting ring (4), a sun gear (72) arranged in the gear ring (71) and a plurality of planetary gears (73) meshed with the gear ring (71) and the sun gear (72) simultaneously, and a plurality of fixing shafts (42) penetrating through the planetary gears (73) are arranged on the adjusting ring (4).

3. The transmission device according to claim 2, characterized in that: the adjusting mechanism is characterized in that one end, far away from the adjusting ring (4), of the sun gear (72) extends to be provided with an adjusting shaft (74), and one end, far away from the sun gear (72), of the adjusting shaft (74) is connected with an adjusting assembly (8) used for controlling the rotation of the adjusting shaft (74).

4. The transmission device according to claim 1, characterized in that: one end, far away from the driving ring (811), of the driving support ring (814) is connected with a driving clamping ring (815), and a driving ring groove (816) which has a limiting effect on the adjusting rope (825) is formed between the driving clamping ring (815) and the driving ring (811).

5. The transmission device according to any one of claims 1 to 4, wherein: the positioning shaft (11) is sleeved with a centering bearing (12), and a centering hole (13) matched with the centering bearing (12) is formed in the middle of the transmission ball (1).

6. The transmission device according to claim 5, characterized in that: edges at openings at two ends of the centering hole (13) are arranged in a chamfering mode.