CN114704603A

CN114704603A - Ratchet chain type stepless speed change device

Info

Publication number: CN114704603A
Application number: CN202210010745.0A
Authority: CN
Inventors: 张锁龙
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-01-05
Filing date: 2022-01-05
Publication date: 2022-07-05

Abstract

The invention belongs to the technical field of stepless speed change, and particularly discloses a ratchet chain type stepless speed change device. Comprises a power source, a hydraulic pump and a driving wheel; driven pulley and transmission band. The power source is axially connected with the driving wheel and provides power for the driving wheel, and the driving wheel and the driven wheel are both provided with a plurality of pawls along the circumferential direction; the inner wall of the transmission belt is provided with a ratchet, and the general shafts of the driving wheel and the driven wheel are also provided with radius adjusting devices; the output end of the hydraulic pump is axially connected with the radius adjusting device and is used for driving the radius adjusting device. In the speed changing process of the speed changer, the output torque is improved, and meanwhile, redundant chains released by the driving wheel or the driven wheel due to the fact that the radius distance is reduced can be shifted to the driven chain wheel or the main chain wheel which needs to be increased in length for supplementing the chains due to the fact that the radius is increased through extremely small friction force, and abrasion to a transmission belt is avoided.

Description

Ratchet chain type stepless speed change device

Technical Field

The invention belongs to the technical field of stepless speed change, and particularly relates to a ratchet chain type stepless speed change device.

Background

At present, the stepless speed change mainly adopts a steel belt type stepless speed changer, and has the advantages of high kinetic energy utilization rate and no pure feeling of frustration. However, the disadvantage is that it has a serious drawback of insufficient torque, high cost and susceptibility to wear of the metal strip. Therefore, the large-area popularization and development of the steel belt type continuously variable transmission are restricted. It is known that the steel belt type continuously variable transmission is formed by changing the radius distance between the metal belt and the contact part of the two cone pulley diameter surfaces and the axle center, for example, increasing the radius distance between the main cone pulley and the contact part of the steel belt and the cone pulley diameter surfaces, but reducing the radius distance between the steel belt and the contact part of the cone pulley diameter surfaces. Or the radius distance between the steel belt on the main cone pulley and the part contacting the tapered surface is reduced, but the radius distance between the steel belt on the auxiliary cone pulley and the part contacting the tapered surface is increased. And a metal belt and a main cone pulley; the radial length of the cone pulley contacting the cone surface determines the output speed of the transmission. Of course, on the cone pulley, the change of the radius distance of the metal belt and the cone pulley contact diameter surface part also changes the distance length of the arc part where the metal belt and the cone pulley contact. If the radius distance from the metal belt and the cone diameter surface part contacted with the metal belt to the shaft center is reduced on the slave cone pulley, the distance between the metal belt and the arc part contacted with the cone diameter surface is correspondingly reduced, and the metal belt with a certain length distance is released. Meanwhile, on the main cone pulley, because the radius distance between the metal belt and the part of the conical diameter surface contacted with the metal belt is increased, the distance between the metal belt and the part of the conical diameter surface contacted with the arc part is also increased correspondingly, and the metal belt released from the cone pulley needs to be accommodated. However, in this shifting operation on a steel belt CVT, the metal belt and the conical pulley radius surface are at asynchronous speeds, and it has a slipping operation of the metal belt along the conical pulley radius contact surface, which means that in the steel belt CVT, the metal belt and the conical pulley must pass through a slipping operation to complete the shifting operation. This involves a key core problem, namely the problem with "rubbing force". For a steel belt type continuously variable transmission, the speed change process is a process that a metal belt slips along a conical surface. The friction force is avoided as much as possible, and the abrasion of the cone pulley to the steel belt and the kinetic energy loss are reduced. However, in the process of transmitting power, the static friction force is increased as much as possible, and a certain torque transmission task cannot be completed without a certain static friction force. Therefore, in the steel belt type CVT, the 'speed change' and the 'transmission power' are irreconcilable contradictions, and the metal belt with the top quality is not only a temporary solution but also a permanent solution.

Therefore, it is an urgent technical problem to provide a new ratchet chain type continuously variable transmission device, which is also a technical problem to be solved by those skilled in the art.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a ratchet chain type stepless speed change device.

The invention provides a ratchet chain type stepless speed change device. Comprises a power source 1, a hydraulic pump 2, a driving wheel 14, a driven wheel 15 and a transmission belt 4. The power source 1 is axially connected with the driving wheel 14 and provides power for the driving wheel 14; the driving wheel 14; the driven wheel 15 has basically the same structural form and comprises a main shaft and wheel disc assembly, a branch ratchet and chain wheel assembly and a pyramid. The driving wheel 14 and the driven wheel 15 are both provided with a plurality of pawls 16 along the circumferential direction; ratchets are arranged on the inner wall of the transmission belt, and at least one pawl 16 of the driving wheel 14 and the driven wheel 15 is meshed with the ratchets; the main shaft 3 is also provided with a pyramid with a radius adjusting device; the output end of the hydraulic pump 2 is connected with the radius adjusting device pyramid through a bearing and is used for controlling the radius adjusting device pyramid.

The further proposal is that the combination of the main shaft and the wheel disc comprises a wheel shaft 3 and two wheel discs 11; the two wheel discs 11 are completely the same in size and shape; a shaft hole matched with the cross section of the wheel shaft 3 is arranged on the center of the wheel disc 11; the wheel discs 11 are distributed with strip-shaped holes 13, the included angle between every two adjacent strip-shaped holes 13 is 60 degrees, the length distance of each strip-shaped hole 13 from the circle center of the wheel disc is equal to the radius length distance of the belt wheel attached to the main shaft 3, the two wheel discs 11 respectively penetrate into the shaft from two ends of the main shaft 3, the surfaces of the two wheel discs 11 are parallel to each other and are vertical to the main shaft 3; sandwiching the additional wheels of the main shaft 3. Further, each pair of the strip-shaped holes 13 on the two wheel discs 11 are positioned at the same angle of the main shaft 3. In a further scheme, concave arc grooves are arranged on two edges of the strip-shaped hole 13. The further proposal is that a plurality of branch ratchet and sprocket assemblies are arranged on the driving wheel 14 and the driven wheel 15 along the circumferential direction; the branch ratchet chain wheel assembly comprises two sliding blocks 9 and a branch ratchet chain wheel 5; the two sliding blocks 9 are perpendicular to the axial line of the branch ratchet chain wheel 5 and parallel to the surface of the branch ratchet chain wheel 5, and the distance between the two sliding blocks 9 is the distance between the two wheel discs 11 on the wheel disc assembly. Each sliding block 9 is formed by connecting two sub-sliding blocks through a bullet; the edges of two sides of the sliding block 9 are provided with a slide block; the convex arc edges are matched with the concave arc grooves on the edges of the two sides of the strip-shaped hole 13. Shafts at two ends of each branch ratchet chain wheel 5 are respectively inserted into a pair of corresponding strip-shaped holes 13 through a pair of sliding blocks 9, the branch ratchet chain wheels 5 are positioned between two wheel discs 11, the shafts at two ends of each branch ratchet chain wheel 5 are respectively positioned in a pair of corresponding strip-shaped holes 13, the shafts of the branch ratchet chain wheels 5 and the main shaft are parallel to the main shaft 3 on the wheel disc assembly, and the shafts are used for the sliding blocks 9 to carry the branch ratchet chain wheels 5 to move back and forth along the tracks of the strip-shaped holes 13; in each strip-shaped hole 13, two sliding blocks 9 are connected to the same branch ratchet chain wheel 5, a concave trapezoidal groove is reserved at one end of each sliding block 9 close to the main shaft 3, and the upper bottom of the trapezoid is positioned at one end of the sliding block 9 close to the main shaft 3. And a pair of sliders 9 disposed on the same ratchet sprocket 5 are different in length distance from each other. The line between the grooves of each pair of sliding blocks 9 forms an angle with the axial direction. The pawl 16 is provided on the branch ratchet sprocket 5. A pawl 16 is arranged on the driving wheel 14 and is divided into the ratchet chain wheel 5; a pawl 16 is arranged on the driven wheel 15 and is divided into the ratchet chain wheel 5, and the pawl 16 arranged on the driven wheel and the ratchet chain wheel point to the direction slightly; and the pawl 16 are not in the same axial correspondence.

Further, the transmission belt 4 comprises three ratchet chains 5 and two triangular belts 19;

for the ratchet chain of the present invention: for example, on the flywheel outer of the bicycle, the ratchets are distributed and arranged on the circumferential inner wall of the flywheel outer according to the uniform arrangement direction, and the ratchet connecting strip 12 is equivalent to the flywheel outer of the bicycle, and the arrangement of the ratchets in the form of splitting each section of the ratchets is similar to chain form and is linked into a circular ratchet ring with the variable arrangement shape. We call it the "ratchet chain 12". The ratchet sections of the three ratchet chains 12 are the same. Wherein, the ratchet arrangement direction of the two ratchet chains 12 at the side edges of the transmission belt is opposite to the ratchet arrangement direction of the ratchet chain 12 at the middle of the transmission belt. The two triangular belts 19 are used for connecting the three ratchet chains 12. The three ratchet chains 12 are connected with the two triangular belts 19 through pin shafts 17. Further, 6 branch ratchet chain wheels 5 are arranged. In a further aspect, the radius adjusting device is a pyramid. Comprises a flange, 6 right-angled triangular steel blocks 6 and a section of steel pipe 10; the inner diameter of the central hole of the flange is equal to the outer diameter of the steel pipe 10, the central hole of the flange is sleeved on the main shaft 3, and the flange can slide back and forth relative to the main shaft 3; the same trapezoid shape is protruded on each die section of the hypotenuse of the right-angled triangle steel block 6, and the lower bottom surface of the hypotenuse is a trapezoid. The right-angle triangular steel blocks 6 are distributed and fixed on one surface of the flange, the short right-angle side of the right-angle triangular steel blocks 6 is connected with the flange surface, and the right angle of the short right-angle side is close to the center of the flange; the intersection angle point of the inclined side and the short right-angle side is close to the circumferential direction of the flange. And the 6 surfaces of the right-angle triangular steel blocks are vertical to the flange surface. The steel pipe 10 is vertically fixed on the central hole of the other surface of the flange and is used for controlling the handle of the radius adjusting device pyramid. The pyramid is inserted into each right-angled triangular steel block 6 of each strip-shaped space, the angle of the bevel edge of each triangular steel block 6 is also coincided with the angle formed by the connecting line between each pair of grooves of the sliding block 9 and the axis direction, and the angles are matched with each other. Meanwhile, the concave trapezoidal groove on the sliding block 9 is matched with the convex trapezoidal shape of each cross section on the bevel edge of the pyramid. Therefore, each inclined edge on the pyramid protrudes out of the trapezoidal cross section and can be inserted into the trapezoidal concave groove of the corresponding pair of sliding blocks.

The further scheme is that the steel pipe 10 is connected with an output shaft of the hydraulic pump 2 through a bearing 7 and a section of rod 8, and the hydraulic pump 2 is fixed above and below the rod 8.

Compared with the prior art, the invention has the beneficial effects that:

(1) in the speed changing process of the speed changer, the output torque is improved, and meanwhile, the redundant transmission belt 4 released by the driving wheel 14 or the driven wheel 15 due to the fact that the radius distance is reduced can be shifted to the driven wheel 15 or the driving wheel 14, the length distance of the supplementary transmission belt 4 needs to be increased due to the fact that the radius is increased, and abrasion to the transmission belt 4 is avoided.

(2) The invention is characterized in that a plurality of identical branch ratchet chain wheels 5 are respectively and equally distributed on the circumferences of a driving wheel 14 and a driven wheel 15 to form a non-continuous indirectly arranged conveying belt groove section which is equally distributed on the circumferential positions of the driving wheel 14 and the driven wheel 15 and can replace the whole circumferential conveying belt grooves which are arranged on the driving wheel 14 and the driven wheel 15 and are arranged continuously. The effects of supporting, bearing and fixing the running track of the conveyor belt 4 can also be achieved.

(3) The invention adopts a novel method to separate the branch ratchet chain wheel 5 on the driven wheel 15 and the driving wheel 14 from the driven wheel 15; the radial distance of the general axis 3 of the driving wheel 14 is inversely proportional. Thereby achieving the speed change effect.

(4) The invention adopts the ratchet chain 12 to replace a metal belt, and the power on the driving wheel 14 is applied to the driven wheel 15 through the conveying belt 4 by the ratchet chain 12 respectively meshed with the pawls 16 on the driving wheel 14 and the driven wheel 15. The output torque of the transmission is improved, and the static friction between the transmission belt and the belt wheel is avoided.

Drawings

The invention is illustrated and described only by way of example and not by way of limitation in the scope of the invention as set forth in the following drawings, in which:

FIG. 1: the driving wheel/driven wheel and the transmission belt are matched in structure;

FIG. 2: is an enlarged view of the dotted line portion of FIG. 1;

FIG. 3: the structure schematic diagram of the general shaft and the wheel disc assembly;

FIG. 4: a schematic structural diagram of the driving wheel;

FIG. 5: the structure front view of the driving wheel;

FIG. 6: the radius distance between the driving wheel and the driven wheel and the section schematic diagram of the inverse proportion change principle.

In the figure: : the device comprises a power source 1, a hydraulic pump 2, a wheel shaft 3 (also a driving wheel or a driven wheel), a transmission belt 4, a ratchet chain wheel 5 branches, a right-angle triangular steel block 6, a bearing 7, a rod 8, a sliding block 9, a steel pipe 10, a wheel disc 11, a ratchet chain 12, a strip-shaped hole 13, a driving wheel 14, a driven wheel 15, a pawl 16, a pin shaft 17, a triangular belt groove 18 and a triangular belt 19. .

Detailed Description

Detailed description of the drawings in order to make the objects, technical solutions, design methods, and advantages of the present invention more apparent, the present invention will be described in further detail by way of specific examples with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1-6. The invention provides a ratchet chain type stepless speed change device. The basic structure is as follows: the device is formed by combining a power source 1, a driving wheel 14, a driven wheel 15, a transmission belt 4, an inverse proportion changing device (comprising a hydraulic pump 2) of the radius distance between the driving wheel 14 and the driven wheel 15 and an adjusting device of the tightness of the transmission belt 4 which are arranged on a body frame.

The basic principle is as follows: in the present invention, the power source 1 and the driving wheel 14 are still axially connected to provide power for the driving wheel 14, the driving wheel 14 pulls the driven wheel 15 to run through the transmission belt 4, and the driving wheel 14 still transmits kinetic energy to the driven wheel 15 through the transmission belt 4, usually at the driving wheel 14; the driven wheel 15 is provided with a complete circumferential conveying belt groove on the circumference to fix the running track of the bearing conveying belt 4. However, in the invention, a plurality of branch ratchet sprockets 5 are respectively and equally distributed on the circumferences of the driving wheel 14 and the driven wheel 15, and each branch ratchet sprocket 5 is not provided with a transmission belt groove. A non-coherence is formed; a plurality of scattered transmission belt slot sections are indirectly arranged and are evenly distributed on the circumference positions of the driving wheel 14 and the driven wheel 15, so that the transmission belt slots which are integrally and continuously arranged on the circumference of the driving wheel 14 and the driven wheel 15 can be replaced (refer to fig. 1). The effects of supporting, bearing and fixing the running track of the conveyor belt 4 can also be achieved.

The invention is also in the driving wheel 14; on the wheel disc of the driven wheel 15, a slider track (i.e. a strip-shaped hole 13) is respectively arranged on each branch ratchet chain wheel 5 along the radius direction. These branch ratchet sprockets 5 each pass

The sliding blocks 9 are respectively inserted into the corresponding sliding block tracks, and the sliding blocks can carry the scattered segments to move back and forth along the conveying belt slot tracks. At the driving wheel 14; or on the driven wheel 15, the driving wheel 14 is completed by the simultaneous movement of the sliding blocks 9 towards the general axis 3; or the radius of the driven wheel 15 shrinks. The driving wheel 14 is completed by the slide blocks 9 simultaneously moving to the opposite direction of the general axis 3; or the radius of the driven wheel 15 is expanded. The length distance from each slide block 9 to the total axis 3 is shortened on the driving wheel 14; or simultaneously expand the length distance of each slide 9 to the total shaft center 3. But simultaneously expanding the length distance from each sliding block 9 to the total shaft center 3 on the driven wheel 15; or simultaneously shorten the length distance from each slide 9 to the total shaft center 3. But can be a driven wheel 14; the radius distance of the driving wheel 15 is changed in inverse proportion, so as to achieve the speed change effect. Also, at the drive wheel 14; each section of the transmission belt groove of the driven wheel 15 is provided with a pawl 16, the inner wall of the transmission belt 4 is provided with ratchets, and the ratchets on the transmission belt 4 are respectively meshed with the pawls 16 on the driving wheel 14 and the driven wheel 15 through the ratchets on the chain 12 on the transmission belt 4, so that the power on the driving wheel 14 is applied to the driven wheel 15 through the transmission belt 4. The output torque of the transmission is improved. Meanwhile, in the speed change process of the transmission, the transmission can also be a driving wheel 14 or a driven wheel 15, and the redundant transmission belt 4 released due to the fact that the radius distance is reduced moves towards the driven wheel or the driving wheel, which needs to increase the length of the supplementary transmission belt 4 due to the fact that the radius is increased, with extremely small friction force. It avoids the friction generated directly by the local transmission belt 4 during the displacement and the transmission belt slot, thereby prolonging the service life of the transmission belt 4. The invention is divided into three areas by the technical level.

The radius of a driving wheel 14 and a driven wheel 15 is changed; and the principle of the inverse proportional change of the radial distance between the driving pulley 14 and the driven pulley 15.

In the present invention, the driving wheel 14; the basic structure of the driven wheel 15 is the same (see fig. 4), and the principle of changing the radius is the same. Each consisting of: a. 1 total shaft and wheel disc assembly, b and 6 branch ratchet and chain wheel 5 assemblies, c and 1 pyramid, and three components combined.

a: a main shaft and wheel disc assembly; the assembly of the main shaft and the wheel disc comprises a main wheel shaft 3 and two wheel discs 11; the two wheel discs 11 are completely the same in size and shape; a shaft hole matched with the cross section of the main shaft 3 is arranged on the circle center of the wheel disc 11; the wheel discs 11 are distributed with strip-shaped holes 13, the included angle between every two adjacent strip-shaped holes 13 is 60 degrees, the length distance of each strip-shaped hole 13 from the circle center of the wheel disc is equal to the radius length distance of the belt wheel attached to the main shaft 3, the two wheel discs 11 respectively penetrate into the shaft from two ends of the shaft 3, the disc surfaces 11 of the two wheels are parallel and vertical to the shaft 3; sandwiching the additional wheels of the shaft 3. (see figure 3) a further solution is that the 6 pairs of strip-shaped holes 13 on the two discs 11 are each at the same angle to the axle shaft 3. Further, the two edges of each strip-shaped hole 13 are provided with concave arc grooves. This forms six pairs of row holes 13, each pair of row holes 13 being a set of slider rails.

b: the branch ratchet and sprocket combination: (left and right ends of the figure 2) the branch ratchet chain wheel assembly comprises two sliding blocks 9 and a branch ratchet chain wheel 5; the branch ratchet sprocket 5 is provided with a transmission belt groove and a pawl 16. The two sliding blocks 9 are perpendicular to the axial line of the branch ratchet chain wheel 5 and parallel to the wheel surface of the branch ratchet chain wheel 5, and the distance between the two sliding blocks 9 is the distance between the two wheel discs 11 on the wheel disc assembly; the edges of two sides of the sliding block 9 are provided with convex arc edges, and the convex arc edges of the sliding block 9 are matched with the concave arc grooves on the edges of the strip-shaped holes on the combination of the main shaft 3 and the wheel disc 11. Shafts at two ends of the 6 branch ratchet chain wheels 5 respectively pass through a pair of self sliding blocks 9 and are respectively inserted into a group of corresponding strip-shaped holes 13 on the combination body of the main shaft and the wheel disc. Each branch ratchet chain wheel 5 is arranged between two wheel discs 11, shafts at two ends of each branch ratchet chain wheel 5 are respectively arranged in a group of corresponding strip-shaped holes 13, a small shaft and a main shaft of each branch ratchet chain wheel 5 are parallel to a main shaft 3 on the wheel disc assembly, and each pair of sliding blocks 9 can carry the branch ratchet chain wheel 5 to reciprocate along the track of the strip-shaped holes 13.

c: a vertebral ridge: the pyramid is formed by combining three types of apparatuses.

c 1: 6 right-angled triangle steel blocks 6 with the same size and shape. The same trapezoid shape is protruded on each die section of each steel block bevel edge, and the bevel edge surface is a trapezoid lower bottom surface.

c 2: a length of steel tubing 10.

c 3: a flange. The distance of the central hole of the flange is equal to the distance of the outer diameter of the steel pipe 10, and the distance of the inner diameter of the steel pipe 10 is slightly larger than the distance of the diameter of the main shaft 3 of the main shaft wheel disc. And 6 right-angle triangular steel blocks 6 are distributed and fixed on one surface of the flange according to the angular position distance of the 6 groups of strip-shaped holes. The short right-angle edge is connected with the flange surface; the right angle of the flange is close to the center of the flange; the intersection angle point of the inclined side and the short right-angle side is close to the circumferential direction of the flange. And the 6 surfaces of the right-angle triangular steel blocks are vertical to the flange surface. On the other face of the flange. The steel pipe 10 is vertically fixed on the central hole, and the combination is completed. The length of steel tubing 10 corresponds to the handle of a pyramid. A handle (steel pipe 10) of a pyramid is sleeved on one end shaft 3 of the general shaft and wheel sheet combined body, and the 6 right-angled triangular steel blocks are simultaneously inserted into the 6 groups of strip-shaped holes 13. The long right-angle side is contacted with the end, closest to the main shaft 3, of the strip-shaped hole 13, the short right-angle side is parallel to the strip-shaped hole 13, the long right-angle side is perpendicular to the strip-shaped hole 13, and the inclined side is in related traction connection with the sliding block 9. Looking again at the two-wheel disc 11, how are a pair of the sliding blocks 9 on the same branched ratchet and sprocket assembly in each set of slots 13 in the two-wheel disc associated with the hypotenuse of the corresponding right-angled triangular steel block 6 on the pyramid?

(a) The method comprises the following steps In each group of strip-shaped holes 13, two sliding blocks 9 are connected to the same branch ratchet chain wheel 5, a concave trapezoidal groove is reserved at one end of each sliding block 9 close to the general axis 3, and the trapezoidal upper bottom of each sliding block is positioned at one end of the sliding block close to the general axis. And the lengths of the groups of sliding blocks 9 are different, and a clamping angle is formed between a connecting line between the grooves of the groups of sliding blocks and the axial direction. (refer to FIG. 2)

(b) The method comprises the following steps The pyramid is inserted into each right-angled triangular steel block 6 of each strip-shaped space 13, the angle of the hypotenuse of the pyramid is also coincided with the angle formed by the connecting line between the grooves of each group of sliding blocks 9 and the axial direction, and the angles are matched with each other as complementary angles (refer to fig. 6).

(c) Meanwhile, the concave trapezoidal groove on the sliding block 9 is matched with the convex trapezoidal shape of each cross section on the bevel edge of the pyramid. (see fig. 5) so that the inclined convex trapezoidal cross section of each right-angled triangular steel block 6 on the pyramid can be inserted into the trapezoidal concave groove of each corresponding group of sliding blocks 9.

The reducing principle of the driving wheel 14 and the driven wheel 15 is as follows:

on the driving wheel 14 and the driven wheel 15, both ends of the general shaft 3 are fixed on the body frame through bearings 7, the position of the general shaft 3 is kept unchanged, and it should be noted that, on the driving wheel 14; on the driven wheel 15, each branch ratchet-sprocket assembly is reciprocally displaced along the strip-shaped hole 13 in the radial direction of the two wheel discs 11, and the pyramid is reciprocally displaced along the axial direction of the general shaft 3. The distance between the pyramid entering and exiting the strip-shaped holes 13 is changed by the reciprocating displacement of the pyramid handle along the axis of the general shaft 3. But on each strip-shaped hole 13, the distance of the right-angle triangular steel block 6 in the strip-shaped hole 13 is changed according to the spatial position, the slide block 9 in the strip-shaped hole 13 is driven to slide along the displacement of the strip-shaped hole, and the radius length of each branch ratchet chain wheel 5 from the main shaft 3 is driven to change. (see fig. 5) in the strip-shaped hole 13, when the distance from the trapezoidal cross section on the hypotenuse edge of each right-angled triangular steel block 6 of the pyramid to the radius of the total axis 3 is increased, the lower bottom surface of the trapezoidal cross section on the hypotenuse edge of each triangular steel block 6 of the pyramid pushes each branch ratchet chain wheel 5 to carry out radius amplification through the sliding block 9. When the distance from the trapezoid cross section of each edge of the pyramid to the radius of the total axis is reduced, the two waist surfaces of the trapezoid cross section of each edge of each triangular steel block 6 on the pyramid draw the radius of each branch ratchet chain wheel 5 through the sliding block 9 to shorten. This is the principle of radius change of the driven wheel 15 and the driving wheel 14.

Principle of inverse proportion reducing of driving wheel 14 and driven wheel 15

(see fig. 6) fig. 6 is a schematic cross-sectional view of a top view of the principle of inverse proportional change of the radial distance between the driving wheel and the driven wheel. On the figure; the lower direction is substantially the front of the transmission; a posterior direction, also or inwardly; in the outward direction. Only one description is made.

The driving wheel 14 and the driven wheel 15 are fixed on the bracket body through bearings 7 at two ends of the main shaft 3. The two pyramids are juxtaposed at the same level. On the figure, on the bracket body; the hydraulic pumps 2 are fixed on the lower parts of the two hydraulic pumps 2, and the two hydraulic pumps 2 share the same output shaft. The handles (10) of the two pyramids pass through a bearing 7 respectively; the first section of rod 8 is connected with the output shaft of the hydraulic pump 2 to combine the two pyramids into a whole. The inner sleeve of the bearing 7 is connected with the pyramid handle, and the outer sleeve of the bearing 7 is connected with the rod 8. When the upper hydraulic pump 2 works, the upper hydraulic pump applies downward force to the output shaft to pull the two pyramids to synchronously move downwards. When the lower hydraulic pump 2 works, the lower hydraulic pump exerts upward force on the output shaft to drive the two pyramids to synchronously move upwards. The bearing 7 has the functions of: only an upward or downward force is applied to the pyramid. But not interfere with the operation of the pyramid with the driving wheel 14 or the driven wheel 15. Because the pyramid handle is downward on the driving wheel, but upward on the driven wheel. When the upper hydraulic pump 2 generates a force. The triangular steel blocks 6 on the pyramid of the driven wheel 15 occupy the space positions in the strip-shaped holes 13 in a stepwise manner, so that the distance between each branch ratchet chain wheel 5 on the driven wheel 15 and the main shaft 3 is gradually increased, and the radius of the driven wheel 15 is gradually increased. Meanwhile, the triangular steel blocks 6 on the pyramid on the driving wheel 14 occupy the space positions in the strip-shaped holes 13 step by step, namely the distance between each branch ratchet chain wheel 5 on the driving wheel 14 and the main shaft 3 is gradually shortened, and the radius of the driving wheel 14 is gradually shortened. When the lower hydraulic pump 2 generates a force. The triangular steel blocks 6 on the pyramid on the driven wheel 15 are shortened step by step, and the triangular steel blocks occupy the space positions in the strip-shaped holes 13, so that the radius of the driven wheel 15 is gradually shortened. Meanwhile, each triangular steel block 6 on the pyramid of the driving wheel 14 occupies a certain spatial position in the strip-shaped hole 13 in a step-by-step manner, and the radius of the driving wheel 14 is gradually enlarged. Because the driving wheel 14 and the driven wheel 15 are in the same horizontal spatial position. And the angle angles of the triangular steel blocks 6 on the two pyramids are the same, so when the two pyramids are positioned at the half position of the strip hole 13, the radius of the driving wheel 14 and the radius of the driven wheel 15 are equal under the condition. So that the two pyramids can be displaced in either the upward or downward direction. While the radial distance generated by both the driving wheel 14 and the driven wheel 15 is always inversely proportional. For example, on the drive wheel 14, the radius of the drive wheel 14 increases by a unit r length each time the pyramid passes upwardly over the slot by a unit S distance. At the same time, the pyramid on the driven wheel 15 also crosses the strip-shaped hole every time upwards by a unit distance S, but the radius of the driven wheel 15 is shortened by a unit length r. That is, when the radius of the driving pulley 14 is the largest, the radius of the driven pulley 15 is the smallest, and when the radius of the driving pulley 14 is the smallest, the radius of the driven pulley 15 is the largest, which also illustrates that the length of the belt released by the reduction of the radius is substantially equal to the length of the belt required by the increase of the radius from the length of the belt released by the reduction of the radius.

The second step is as follows: the basic principle of ratchet chain 12 transmission; and in the speed changing process of the speed changer, the driving wheel 14 or the driven wheel 15 is shifted to the driven wheel 15 or the driving wheel 14, which needs to increase the length of the supplementary transmission belt 4 due to the increase of the radius, by the extremely small friction force, of the surplus transmission belt 4 released due to the decrease of the radius distance. And the principle that the local transmission belt 4 directly generates friction in the displacement process and the transmission belt groove and the service life of the transmission belt is prolonged is avoided.

As mentioned above, the present invention is similar to the steel belt type continuously variable transmission, and the driving wheel 14 still pulls the driven wheel 15 to run through the transmission belt 4. However, in the invention, a plurality of same branch chain wheels 5 are respectively and equally distributed and arranged on the circumferences of the driving wheel 14 and the driven wheel 15. A plurality of belt groove sections which can be used for arranging the transmission belt 4 are formed in a non-continuous manner and are indirectly arranged and evenly distributed on the circumferential positions of the driving wheel and the driven wheel, so that the belt groove sections which are arranged on the driving wheel 14 and the driven wheel 15 in a wholly continuous manner and are in a circumferential shape and are used for arranging the transmission belt 4 are replaced. The conveyor belt 4 of the invention is arranged on the driving wheel 14; the transport of these segments on the driven wheel 15 is slotted. The effects of supporting, bearing and fixing the running track of the conveying belt can be achieved. Compared with a steel belt type continuously variable transmission, the transmission belt 4 is also provided with a ratchet chain 12 instead of a metal belt. Meanwhile, the invention is at the driving wheel 14; the driven wheel 15 has a pawl 16 disposed in the belt groove of the respective segment. The power on the driving wheel 14 is applied to the driven wheel 15 via the conveyor belt 4 by the ratchet chain 12 engaging with the pawls 16 on the driving wheel 14 and the driven wheel 15, respectively. The key technology capable of improving the output torque of the transmission is as follows: the ratchet chain 12 on the transmission belt 4 can respectively produce the meshing principle with the pawls 16 on the driving wheel 14 and the driven wheel 15. Other techniques of the present invention are developed around the transmission of the ratchet chain 12. Before not describing the basic principle of the transmission of the ratchet chain 12, we will recognize the structural form of the ratchet chain 12.

For example, the ratchet teeth are distributed on the outer of the flywheel of the bicycle, and the ratchet teeth are distributed on the circumferential inner wall of the outer of the flywheel according to the uniform ratchet tooth arrangement direction, the ratchet tooth connecting strip 12 is equivalent to the outer of the bicycle, and the arrangement of the ratchet teeth in the form of the ratchet teeth divides each section of the ratchet teeth according to the uniform ratchet tooth direction. Every two adjacent ratchet teeth are linked by a shaft pin in a chain-like manner to form a circular and variable-array-shape ratchet chain ring, which is called a ratchet chain 12.

The purpose of the ratchet chain 12 transmission is: under the condition that the driving wheel 14 is driven by the power source 1 to operate clockwise, the pawl 16 on the driving wheel 14 is meshed with a ratchet on the ratchet chain 12 to drive the ratchet chain 12 to operate clockwise, and then the pawl 16 on the driven wheel 15 is meshed with a ratchet on the ratchet chain 12 to operate clockwise after the ratchet chain 12 operates clockwise. This transmits the power of the driving pulley 14 to the driven pulley 15 through the ratchet chain 12. Thereby achieving the purpose of improving the output torque of the transmission.

Each section of ratchet teeth on the ratchet chain 12 can be seen as a right triangle, and the sections of ratchet teeth are engaged by the short right-angle side and the pawl tip 16. Firstly, the power source 1 rotates clockwise, certainly, the driving wheel 14, the ratchet chain 12 and the driven wheel 15 also rotate clockwise, and the driving wheel 14 rotates clockwise, so that only the pawl 16 on the driving wheel 14 points to the clockwise direction of the driving wheel; and in this ratchet chain 12, under the condition that the short right-angle side of each ratchet is in its own counterclockwise direction, the pawl 16 of the driving wheel 14 can only be engaged with the short right-angle side of the ratchet chain 12, and only can the driving wheel 14 pull the ratchet chain 12 to rotate clockwise, and then the power of the driving wheel 14 can be applied to the ratchet chain 12, so that under the form that the short right-angle side of each ratchet is in its own counterclockwise direction, can the ratchet chain 12 pull the driven wheel 15 to rotate clockwise? Think of seeing! We analyze under what conditions the driven pulley 15 can be driven to run clockwise when the toothed chain 12 runs clockwise? We can reason about that: whether the pawl 16 on the follower 15 points slightly clockwise; or in a counter-clockwise direction. The ratchet chain 12 cannot be engaged with the pawl 16 on the driven wheel 15, so that the ratchet chain 12 cannot be realized and the driven wheel 15 is pulled to rotate clockwise. So it is said to be in this form. The driving wheel 14 cannot pull the driven wheel 15 to move along the needle by the ratchet chain 12.

However, we can also reason out that if we require the ratchet chain 12 to run clockwise we can also pull the driven wheel 15 to run clockwise. Then, the heart must only point the pawl 16 on the follower 15 in its counterclockwise direction and on this ratchet chain 12 the short right-angled sides of the ratchets are in their own clockwise direction. In such a format, when the ratchet chain runs clockwise, the ratchet chain 12 can be meshed with the pawl 16 on the driven wheel 15, and the ratchet chain 12 can pull the driven wheel 15 to run clockwise. The power of the ratchet chain 12 can be applied to the driven pulley 15. First of all, we need to make a clear about this problem. On the driving wheel 14, the driving wheel 14 pulls the ratchet chain 12 to rotate clockwise. But on the driven wheel 15, the ratchet chain 12 pulls the driven wheel 15 to rotate clockwise. I.e. on the premise of clockwise operation. The driving wheel 14 and the driven wheel 15 are respectively matched with two different meshing systems, or two different meshing formats. On the driving wheel 14 engagement system: its pawl 16 points clockwise; and on this ratchet chain 12, the short right-angle sides of each ratchet are in the counterclockwise direction of its body. On the driven wheel 15 engagement system: its pawl 116 points slightly counter-clockwise; and on this ratchet chain, the short right-angle side of each ratchet is in the clockwise direction of the ratchet chain. It can be seen that on both the primary 14 and secondary 15 meshing systems, their pawls are slightly oriented 16; and the short right-angled edges of the ratchet teeth on the ratchet chain 12 are all in diametrically opposite directions. The invention combines two opposite meshing systems of the driving wheel 14 and the driven wheel 15, and the transmission belt 4 has the same number of the two ratchet sections matched with the driving wheel 14 and the driven wheel 15 respectively; ratchet chains 12 with opposite ratchet arrangement directions are combined and integrated into the same transmission belt 4. The transmission belt 4 composed of two ratchet chains 12 is arranged and arranged on a driving wheel 14; driven wheel 15 is arranged in a ratchet groove on the two wheels (the ratchet groove is the space for arranging a plurality of ratchet chains on the ratchet chain wheel.)

And the driving pulley 14 and the driven pulley 15 are connected to each other. Then at the drive wheel 14; the ratchet grooves of the ratchet chain wheels of the driven wheel 15 contain and have two parallel ratchet chains 12 running track spaces on each cross section. The pawls 16 of the driving wheel 14 are arranged at the ratchet grooves and the corresponding running track space positions of the ratchet chain 12. The pawl 16 on the follower 15 is also arranged in the ratchet groove and in the spatial position of the running track of the ratchet chain 12 corresponding to it. Because each link of the two ratchet chains 12 is integrated. The power on the driving wheel 14 can be transmitted to the driven wheel 15 through the two ratchet chains 12, which is the transmission principle of the ratchet chains 12 and is the most fundamental principle of the invention for improving the output torque.

The transmission is designed to not only improve the output torque, but also reduce the friction between the local displacement of the ratchet chain and the transmission belt groove in the speed changing process of the transmission. (see fig. 2) and (fig. 2) is an enlarged view of the dotted line portion (fig. 1).

(fig. 2) the middle part is in the structural format of the conveyor belt 4 (fig. 1).

(see the middle part of fig. 2). The transmission belt 4 comprises three ratchet chains 12 with the same number of ratchet joints; two identical V-belts 19 are combined. Two V-belts 19 respectively positioned on two sides of each cross section of the transmission belt 4; the secondary side edges are two ratchet chains 12 with the ratchet short right-angle edges in the self anticlockwise direction; the middle part is a ratchet chain 12 with ratchet short right-angle edges in the clockwise direction; the trapezoidal upper bottom surfaces of the two triangular belts 19 and the ratchet surfaces of the three ratchet chains 12 are on the same surface of the transmission belt 4. If the V-belt 19 on the conveyor belt; the ratchet chains 12 are seen longitudinally side-by-side. Then, on each cross section of the transmission belt 4, three ratchet sections are arranged on the same transverse line in parallel, and the three ratchet sections are connected in series by the same pin shaft 17. And two ends of the pin shaft 17 are respectively bonded with the lower bottom surfaces of the trapezoidal cross sections of the two triangular belts 19, and the two triangular belts 19 and the three ratchet chains 12 are combined into an integral transmission belt 4 by the pin shafts 17.

(FIG. 2) the right end indicates: the format of the ratchet and sprocket assembly on the driving wheel 14 is shown in phantom (fig. 1), and the format of each ratchet and sprocket assembly on the driving wheel 14 is also shown.

(FIG. 2) left end represents: the format of the ratchet and sprocket assembly on the driven wheel 15 is shown in broken lines (fig. 1), and the format of each ratchet and sprocket assembly on the driven wheel 15 is also shown.

The branch ratchet chain wheel 5 comprises: (left end and right end in the figure 2) the ratchet chain wheel 5 on the driving wheel 14 and the driven wheel 15 is basically the same in structure. Each branch ratchet sprocket 5:

two belt wheels with triangular belt wheel grooves 18 are respectively sleeved on two end shafts of a small wheel shaft through a bearing 7. The branch ratchet chain 5 is essentially a conveying belt groove for supporting the conveying belt 4. The conveying belt groove comprises a triangular belt groove 18; a ratchet groove. The pawl 16 is mounted on the small axle of the ratchet slot.

On the driving wheel 14 and the driven wheel 15, the two end shafts of the ratchet chain wheel 5 of each branch respectively pass through the sliding blocks 9 and are inserted into the strip-shaped spaces 13 respectively corresponding to the two end shafts. By a visual metaphor, on the primary wheel 14 and the secondary wheel 15. A small wheel axle on each branch chain wheel 5. Only around the capstan 14; or the total shaft 3 of the driven wheel 15 revolves but does not rotate. Therefore, the tip ends of the pawls 16 are required to be positioned on the circumference of the branch ratchet sprockets 5 away from the driving wheel 14; or the furthest position of the axle center 3 of the driven wheel 15. But rather a pawl 16 on the small axle of each branch sprocket. Are fixed on the circumference of the driving wheel 14 and the driven wheel 15 (see fig. 4).

However, the two pulleys having the triangular pulley grooves 18 not only revolve around the total axis 3 of the driving pulley 14 or the driven pulley 15 but also rotate as needed.

(see fig. 2) in the transmission, the transmission belt 4 is arranged in the transmission belt grooves of the driving pulley 14 and the driven pulley 15 respectively. The conveying belts 4 are respectively provided with conveying belt grooves on the driving wheel 14; the transmission belt grooves on the driven wheel 15 are matched, and the driving wheel and the driven wheel are connected. Two triangular belts 19 on the conveying belt 4 are respectively connected with the driving wheel 14; triangular belt grooves 18 on two side edges of each branch ratchet chain wheel 5 on the driven wheel 15 are matched, and three ratchet chains 12 on the transmission belt 4 are respectively arranged on the driving wheel 14; each branch of the driven wheel 15 is divided into a ratchet chain groove on the ratchet chain wheel 5. Equivalently, the ratchet grooves of the branch ratchet chain wheels 5 on the driving wheel 14 and the driven wheel 15 contain three parallel ratchet chain 12 running track spaces. Therefore, each ratchet tooth groove is divided into three spaces corresponding to the three ratchet chains 12 according to the space.

The transmission system of the continuously variable transmission is essentially composed of two meshing systems. Namely the engagement system of the driving wheel; and the engagement system of the driven wheel.

Engagement system of the driving wheel:

on the driving wheel 14, the pawls 16 of each branch ratchet sprocket 5 are mounted at positions on both sides of the cross section of the respective ratchet groove, with the pawls 16 pointing slightly clockwise. Corresponding to the two ratchet chains 12 on the two sides of the transmission belt 4; contact with each other. And on the two ratchet chains 12, the short right-angle edges of the ratchets are in the counterclockwise direction of the ratchets, so that the ratchets can be matched with the pawls 16 on the driving wheel 14 to complete meshing.

Engagement system of the driven wheel: on the driven pulley 15, the pawls 16 of each branch ratchet sprocket 5 are mounted at intermediate positions of the cross section of the respective ratchet grooves. The pawl 16 points slightly in its counterclockwise direction. Corresponding to the ratchet chain 12 in the middle of the transmission belt 4; are contacted with each other. And on the ratchet chain, the short right-angle side of each ratchet is positioned in the clockwise direction of the short right-angle side of the ratchet. And the pawls 16 of the driven wheel 15 are matched to complete the engagement. Since the two engagement systems are combined and bound, power on the driving pulley 14 can be applied to the driven pulley 15 through the transmission belt 4. In the transmission, the pawls 16 of the driving pulley 14 and the driven pulley 15 are engaged with the ratchet chain 12, and the effect of improving the transmission torque is thought to be obtained.

As to why are two identical ratchet chains 12 used on the meshing system of the driving wheel 15? This is because, if on the meshing system of the driving wheel 15, a ratchet chain 12 is used. The direction of the line connecting the pawls 16 on the driving pulley 14 and the pawls 16 on the driven pulley 15, which are not aligned with the direction of the arrangement of the transmission belt 4, is not coincident with each other, so that wear is caused to the transmission belt 4 during operation of the transmission, and loss of kinetic energy is caused. Therefore, the transmission belt 4 of the invention is formed by combining three ratchet chains 12, and a force in a resultant force form is applied from two pawl 16 parts on the driving wheel 14 to one pawl 16 part on the driven wheel 15, and the direction of the resultant force is consistent with the direction of the transmission belt 4. Without causing wear to the belt 4; and loss of kinetic energy.

The function of the V-belts on both sides of the conveyor belt 4 is as follows: 1. in the process of speed change of the transmission, the driving wheel 14 or the driven wheel 15, the partial redundant transmission belt 4 released due to the reduction of the radius distance, can be shifted to the driven wheel 15 or the driving wheel 14, the length of the supplementary transmission belt needs to be increased due to the increase of the radius. And a phenomenon that the partial ratchet chain 12 passes over the ratchet groove is generated. 2. Since the belt 4 is tensioned, it will exert a force on the ratchet tooth slot in the direction of the general axis 3, which will undoubtedly increase the friction of the ratchet chain 12 over the ratchet tooth slot if the two v-belts 19 are not present. After the two triangular belts 19 are arranged, the three ratchet chains 12 are bound with the two triangular belts 19, and the acting force which is applied to the three ratchet chains 12 and points to the direction of the general axis 3 is supported on the two triangular belts 19, so that the two triangular belts 19 and the wheel sheets on the two sides of each branch ratchet chain wheel 5 cooperate to complete the support of the three ratchet chains 12 and the fixation of the movement tracks of the three ratchet chains 12, and the three ratchet chains 12 can be in contact with the corresponding pawls 16 and keep a certain space distance with the bottoms of the ratchet chain grooves. And avoids the friction between the three ratchet chains 12 and the bottom of the ratchet groove when the three ratchet chains are partially displaced in the speed changing process. The bearing 7 on the wheel sheets on the two sides of each branch ratchet chain wheel 5 has the following functions: the three ratchet chains 12 are carried to be smooth along with extremely low friction; the anticlockwise direction freely and smoothly displaces. The ratchet grooves provide accommodation and displacement channels for the three ratchet chains 12.

The principle that the driving wheel 14 or the driven wheel 15, the surplus transmission belt 4 released due to the reduction of the radius distance, is displaced to the driven wheel 15 or the driving wheel 14, which needs to increase the length of the supplementary transmission belt 4 due to the increase of the radius, with a minimum friction force

The ratchet chain engaging pawl on the driving wheel and the ratchet chain engaging pawl on the driven wheel are respectively engaged with the ratchet chain alternately in a continuous conversion mode. The power of the power source can be applied to the driven wheel by the driving wheel through the three ratchet chains. . In the speed changing process of the speed changer, a local ratchet chain transfer process is provided, but in a driving wheel; at each time on the driven wheel, on each turn. The alternate shift out and ratchet chain engage the pawl, but the partial ratchet chain shift still follows the following rules.

First, we will put the variator on. Each time period; the transmission belt and the driving wheel are used for the engagement pawl conversion in each round; the two positions at which the pawls of the driven wheel are engaged are bounded. The ratchet chain is divided into two sections. The transmission band between two positions is the transmission band upper segment. The lower conveying belt between the two positions is a lower conveying belt section. It transmits the large upper section; the lower sections are each a system. The substantially localized ratchet chain displacement may include two paths, one path: on the same system, one discharges the partial ratchet chains and the other receives the partial ratchet chains for complementary neutralization.

During a transmission shift. A driving wheel; the length distance of the attached ratchet chain on the driven wheel is always contracted or expanded by taking the position meshed with the pawl on the ratchet chain as the center. A driving wheel; or from the wheel, when the radius is reduced. Much released due to smaller radius

The rest ratchet chains are all the driving wheels; the position on the driven wheel, which is meshed with the transmission belt meshed with the pawl, is a watershed, and the driving wheel is divided into two paths which are respectively clockwise of the meshed pawl; discharging the driving wheel in two directions simultaneously in a counter-clockwise direction; or a driven wheel. A driving wheel; or from the wheel, as the radius expands. The ratchet chain is added when the radius is increased, so that the driving wheel is adopted; the position on the driven wheel, which is meshed with the transmission belt meshed with the pawl, is a watershed and is clockwise of the meshed pawl respectively; in the anticlockwise direction, the two directions enter the driving wheel simultaneously; or a driven wheel.

Regarding the principle, the radius of a driving wheel on the transmission is reduced; the following wheel radius increase "is explained as an example. Due to the traction of the driven wheel to the transmission belt, when the radius of the driving wheel is contracted, the attached transmission belt on the driving wheel is discharged outwards, and the attached transmission belt is accommodated in the driven wheel.

On the upper ratchet chain:

according to the arrangement form of the pawls and the ratchets on the driving wheel, when the radius of the driving wheel shrinks, the pawls are engaged at the time, and the pawls in the anticlockwise direction run clockwise along the ratchet chain. The ratchet chain travels in a clockwise direction of the pawl, which is equal to the reduction in the distance of engagement between the pawl and the adjacent ratchet teeth, the pawl and ratchet chain tend to engage, but not to achieve engagement. In the case of a ratchet and pawl that do not reach the engagement, the pawl has a distance to the engagement point despite the limited short engagement distance between the pawl and the ratchet, so that the excess ratchet chain can flow in the counterclockwise direction along the pawl into the follower during the time that the ratchet and pawl have not reached the engagement. (in response to the time at which the drive wheel is engaged, the distance between each pawl in the counterclockwise direction of the engaged pawl and the short right-angled edge of the ratchet chain with which it was engaged decreases

When the radius of the driven wheel is expanded, all the pawls in the clockwise direction which are equivalent to the meshing pawls at the time run in the clockwise direction along the ratchet chain, and the meshing distance between the pawls and the corresponding ratchets is increased. Therefore, each pawl in the clockwise direction of the meshing pawl can pass over the ratchet chain in the clockwise direction and is also equal to that on the driving wheel, the ratchet chain is discharged in the counterclockwise direction of the meshing pawl to flow into the clockwise direction of the meshing pawl of the driven wheel,

on the lower ratchet chain

According to the arrangement form of the pawls and the ratchets on the driving wheel, when the radius of the driving wheel is contracted, the pawls in the clockwise direction which are equivalent to the engaged pawls at the present time run along the ratchet chain in the anticlockwise direction, which is equivalent to enlarging the engagement distance between the pawls and the contacted ratchets. Therefore, the ratchet chain meshed with the pawls in the clockwise direction at the time can compress the springs on the pawls to pass over the pawls and discharge the driving wheel in the clockwise direction.

At the driven wheel, the pawls which are engaged with the pawls in the counterclockwise direction at the present time are equivalent to running in the counterclockwise direction along the ratchet chain. The distance of engagement between the pawl and the touching ratchet tooth, the pawl and ratchet chain tend to engage, but not to achieve engagement. In the case that the ratchet teeth and the pawls are not engaged, although the engaging distance between the pawls and the ratchet teeth is short and limited, the pawls and the engaging points have a distance, so that in the distance that the ratchet teeth and the pawls are not engaged, each pawl can pass through the ratchet chain along the counterclockwise direction, and the discharged part of the ratchet chain which is equal to the clockwise direction of the engaging pawl of the driving wheel flows into the counterclockwise position of the engaging pawl of the driven wheel. (as the slave wheel at this time engages the pawls, the distance between each pawl in the counterclockwise direction and the short right-angled edge of the ratchet chain with which it is in contact decreases, and once engagement is achieved between a pawl and the short right-angled edge with which it is in contact, it will resist and replace the original engaged pawl, becoming the watershed for receiving the ratchet bar on the slave wheel at the next time.)

These localized ratchet chain displacements are accomplished by the ratchet chain wheel running around the bearing. As already mentioned, the acting force exerted by the wheel sheets on the two sides of each branch ratchet chain wheel for supporting the bearing conveying belt can keep a certain space distance between the ratchet chain and the bottom of the corresponding ratchet chain groove. And avoids the direct friction between the ratchet chain and the bottom of the ratchet groove in the process of local displacement. (of course the friction generated by the pawl and ratchet chain is very limited.) the friction generated by these localized ratchet chains during displacement is greatly reduced.

The engaging position of the pawl on the driving wheel and the ratchet chain is deviated to the lower part of the driving wheel. The engaging position of the pawl on the driven wheel and the ratchet chain is biased to be above the driven wheel. In this case on the upper conveyor belt. The length distance of the ratchet chain discharged by the driving wheel due to the radius contraction is larger than that of the ratchet chain which needs to be supplemented by the expansion of the driven wheel due to the radius. After a part of the ratchet chain discharged by the driving wheel due to the radius shrinkage is supplemented on the driven wheel, the rest of the ratchet chain discharged by the driving wheel is stored on the upper-section conveying belt, and the slack state is formed. On the lower section of the transmission belt, the length distance of the ratchet chain discharged by the driving wheel due to the radius shrinkage is smaller than the length distance of the ratchet chain which needs to be supplemented by the expansion of the driven wheel due to the radius. Although the ratchet chain discharged by the driving wheel due to the radius shrinkage is also supplemented to the driven wheel, the requirement of the driven wheel for the length distance of the ratchet chain cannot be met, and therefore, a tensioning tension is generated on the lower-section conveying belt. This applies a clockwise traction force directly to the drive wheel. A counterclockwise traction force is applied to the driven wheel.

The driving wheel and the driven wheel are driven according to the speed changer; the layout format of the pawl and the ratchet chain on the driven wheel is known, and the ratchet chain can pass through each branch ratchet chain wheel on the driving wheel along the clockwise direction on the driving wheel. On the driven wheel. The ratchet chain may pass over the ratchet sprockets of each leg of the driven wheel in a counterclockwise direction. Under the action of the tension force on the lower section of the transmission belt, the pawls on the driving wheel and the driven wheel have a process of being disengaged from the ratchet chain. The residual conveying belt stored on the upper conveying belt. Respectively along the clockwise direction of the driving wheel and the anticlockwise direction of the driven wheel. (actually, the clockwise running speed of the lower conveyor belt is increased, and the clockwise running speed of the upper conveyor belt is reduced) is injected into the part below the nip point of the driven wheels at the same time.

Meanwhile, the upper conveying belt is loosened, so that the driving wheel is separated from the load. These factors all accelerate the clockwise speed of the driving wheel, and the meshing pawl is newly generated, but the ratchet chain remained on the upper section of the conveying belt. The belt is moved to the lower conveyor belt by the driving wheel around the shaft carrying position.

And the engaging position of the pawl on the driving wheel and the ratchet chain is deviated to the upper part of the driving wheel. The engaging position of the pawl on the driven wheel and the ratchet chain is biased to be below the driven wheel. In this case on the lower conveyor belt. The length distance of the ratchet chain discharged by the driving wheel due to the radius contraction is larger than that of the ratchet chain which needs to be supplemented by the expansion of the driven wheel due to the radius. After a part of the ratchet chain discharged by the driving wheel due to the shrinkage of the radius is supplemented to the driven wheel, the rest driving wheel is discharged out of the ratchet chain and stored on the lower-section conveying belt, and the lower-section conveying belt is in a loose state. But on the upper conveyor belt. The length distance of the ratchet chain discharged by the driving wheel due to the radius contraction is smaller than that of the ratchet chain which needs to be supplemented by the expansion of the driven wheel due to the radius. Although the ratchet chain discharged by the driving wheel due to the radius shrinkage is also supplemented to the driven wheel, the requirement of the driven wheel on the length distance of the ratchet chain cannot be met, and therefore, a tensioning tension is generated on the upper-section conveying belt. This tension applies a counterclockwise traction to the lower belt at the right end by the drive pulley. This tension applies clockwise traction to the lower belt at the left end by the driven wheel. According to the transmission, a driving wheel; the layout format of the pawl and the ratchet chain on the driven wheel can be known, and the ratchet chain on the driving wheel can not move along the counterclockwise direction beyond the ratchet chain wheels on the driving wheel. On the driven wheel, the ratchet chain can not move along the clockwise direction beyond the ratchet chain wheels on the driven wheel along the counterclockwise direction. This tensioning force is generated on the upper conveyor belt. Only the driving wheel can be deepened; the driven wheel is meshed with a certain pawl and a ratchet chain. It can also be said. A tension is generated on the upper section of the conveyor belt. The traction force in the counterclockwise direction is directly applied to the driving wheel. A clockwise traction force is applied to the driven wheel. This is a counterclockwise force for the drive wheel. The direction of the tension is opposite to the direction of the driving wheel, but the tension exerts clockwise force on the driven wheel, and the direction of the tension is the same as the direction of the driven wheel, so that the effect on the driven wheel can be generated, and the driven wheel is dragged to improve the clockwise running speed. The excess ratchet chain, which is generally stored on the lower belt section, is displaced into the driven pulley in two steps. Step 1, the driven wheel rotates clockwise around the main shaft of the driven wheel. The redundant ratchet chain stored on the lower conveyor belt passes over the driven wheel in the clockwise direction of the conveyor belt and flows into the upper conveyor belt. And 2, on the driven wheel, the branch ratchet chain wheel rotates along the counterclockwise direction around the self shaft, and the rest ratchet chain is moved to the driven wheel along the counterclockwise direction by the upper section transmission belt. It is worth to be noted that the generation of the tension force of the upper-section transmission belt is directly the work of the hydraulic machine for changing the radius of the driving wheel and the driven wheel; it should be said. The hydraulic machine is in the process of speed change. Part of the power paid out is converted into power for clockwise running of the driven wheel. The transmission is provided with a driving wheel; the driven wheel rotates around the self bearing. And a driving wheel; the driven wheel is divided into a ratchet chain wheel and runs around a self bearing. And the partial residual ratchet chain displacement is completed, and the friction force generated in the partial residual ratchet chain displacement process is greatly reduced due to the efficacy of the bearing.

And thirdly: a device for adjusting the tightness of the conveyor belt 4,

because the driving wheel 14 and the driven wheel 15 are not circular. But rather polygonal rhombi-shaped. If the driving wheel 14 rotates for 60 degrees, it needs to be wound around the transmission belt 4 for different lengths when the driving wheel rotates for different angular degrees in each period. This law is also followed on the driven wheel 15 and because the driving wheel 14 and the driven wheel 15 do not operate at the same frequency. Therefore, the transmission belt of the transmission is always subjected to loose and tight evolution. In addition, due to the structural form of the speed changer, the driving wheels 14 of the speed changer; the driven wheels 15 are at different times of radius ratios from each other, the transmission having different requirements with respect to the distance of the length of the conveyor belt 4 at each time. Because of the above factors, if the length of the conveyor belt 4 is a fixed constant distance. Too much tension of the conveyor belt 4 may be formed; or too loose. The transmission belt 4 is too tight, which can hinder the running of the transmission. The transmission belt 4 is too slack to facilitate engagement of the pawl 16 with the ratchet chain 12. This creates a troublesome problem in customizing the length distance of the transmission belt 4. To solve this problem. On the transmission, the radius distance of a driving wheel 14; the radius distance of the driven wheel 15 is based on a certain distance length, and a proper small amount of floating expansion can be made to balance the tightness of the transmission belt 4. On the driving wheel 14 and the driven wheel 15 of the speed changer, the shafts at both ends of each branch ratchet chain wheel are respectively provided with a spring on the sliding block 9 which is respectively connected. By utilizing the telescopic performance of the spring, the radial distance between each branch ratchet chain wheel and the total axle center 3 can be changed as required within a certain shorter allowable range. And can meet the length distance requirement of the transmission on the transmission belt 4 under various conditions. And the conveyor belt 4 is kept in a certain moderately tensioned state. At the driving wheel 14; each sliding block 9 arranged in each strip-shaped hole 13 on the driven wheel 15 is divided into two sections, one section is respectively connected with the shaft of each branch chain wheel, the other section is provided with a concave groove and is respectively connected with the corresponding pyramid, and each spring is arranged between the two sections of sliding blocks of each strip-shaped hole 13. During operation of the transmission, the transmission belt 4 can be divided into two sections.

1. Bearing section of power source 1 exerting acting force: during the loading of the transmission, it is the section of the transmission belt 4 that bears the force exerted by the power source 1 on the transmission belt 4, between the counterclockwise direction of the transmission belt 4, in which the driving pulley 14 engages with the pawl 16, and the clockwise direction of the transmission belt 15, in which the pawl 16 engages. The tension of the belt 4 is generated to force the spring to be installed in the strip hole 13 of the branch ratchet chain wheel 5 attached to the section, and the radial distance between the branch ratchet chain wheel 5 and the general axle center 3 is shortened correspondingly according to the tension degree of the belt 4.

2. The section of bearing is not applyed to power supply acting force on transmission band 4: the transmission belt 4 is a section of the transmission belt 4 outside a bearing section without acting force of a power source on the transmission belt 4, and the distance between the radius r of each branch ratchet chain wheel 5 in the transmission belt 4 and the corresponding total axle center 3 is almost not influenced by the interference of acting force applied by the power source. Substantially during the load bearing operation of the transmission. The length of the radius of the branch ratchet chain wheel 5 attached to the transmission belt 4 except the bearing section for exerting acting force by the power source 1 from the corresponding general axis 3 is determined according to the tightness of the transmission belt. The process is also completed by installing springs on strip holes 1 of the branch ratchet chain wheels 5 attached to the transmission belt 4 of the section to automatically extend and retract for a proper distance.

The stepless speed changer has wide application, can be applied to bicycles, vehicles and windlasses; a crane; and so on.

When the vehicle needs to move forward, the power of the power source 1 can be switched to the driving wheel 14, the load is switched to the driven wheel 15, and the power source is converted to rotate clockwise, so that the vehicle can also move forward.

For example, when the vehicle needs to reverse, the power of the power source 1 can be switched to the driven wheels 15, the load can be switched to the driving wheels 14, and the power source is converted into counterclockwise operation, and the vehicle can also reverse.

Sometimes, the acceleration of the vehicle needs to be controlled when the vehicle is on a downhill slope; and when the crane hoists the object to fall; when the load of the winch falls from top to bottom; the acceleration needs to be controlled. The continuously variable transmission can have a function of controlling these accelerations.

Such as; when the vehicle is moving downhill, the power of the power source 1 may be switched to the driven wheels 15, and the power source 1 still operates clockwise while the load is switched to the driving wheels 14. The falling acceleration of the vehicle becomes the main force, and the power source 1 becomes the load resistance. Secondly, the radius length distance of the driven wheel 15 is reduced according to the requirement, and meanwhile, the radius length distance of the driving wheel 14 is increased, so that the effect of controlling the acceleration can be achieved.

For another example: when the crane hoists fall; when the load of the winch falls from the top down, and when the vehicle backs up on the wave surface, it is necessary to: firstly, the power source 1 on the driving wheel 14 is changed into a counterclockwise running direction, in this case, the load on the driven wheel 15 drives the transmission belt to run counterclockwise, and the power source 1 on the driving wheel 14 becomes the load resistance of the transmission. Secondly, the radius length distance of the driving wheel 14 is reduced according to the requirement, and meanwhile, the radius length distance of the driven wheel 15 is increased, so that the effects of acceleration control and vehicle backing can be achieved. Having described various embodiments of the invention,

the above description is exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or technical improvements to the market, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A ratchet chain type stepless speed change device is characterized by comprising a power source (1), a hydraulic pump (2) and a driving wheel (14); a driven wheel (15) and a transmission belt (4); the driving wheel (14); the driven wheel (15) has basically the same structural form and comprises a main shaft and wheel disc assembly, a branch ratchet and chain wheel assembly and a pyramid; the power source (1) is axially connected with the driving wheel (14) and provides power for the driving wheel (14); the driving wheel (14) and the driven wheel (15) are both provided with a plurality of pawls (16) along the circumferential direction; ratchets are arranged on the inner wall of the transmission belt (4), and at least one pawl (16) of the driving wheel (14) and the driven wheel (15) is meshed with the ratchets; the main shaft (3) of each of the driving wheel (14) and the driven wheel (15) is also provided with a radius adjusting device pyramid; the output end of the hydraulic pump (2) is connected with the radius adjusting device pyramid through a bearing (7) and is used for controlling the radius adjusting device pyramid.

2. A ratchet chain type continuously variable transmission device according to claim 1, wherein said total axle and disc combination comprises an axle (3) and two discs (11); the two wheel discs (11) are completely the same in size and shape; the center of the wheel disc (11) is provided with a shaft hole matched with the cross section of the wheel shaft; the wheel disc is provided with strip-shaped holes (13), the included angle between every two adjacent strip-shaped holes (13) is 60 degrees, the length distance between every two strip-shaped holes (13) and the center of the wheel disc is equal to the radius length distance of the belt wheel attached to the main shaft (3), the two wheel discs (11) respectively penetrate into the shaft from two ends of the shaft, the surfaces of the two wheel discs (11) are parallel and are vertical to the main shaft (3); sandwiching the accessory wheel of the shaft.

3. A ratchet chain continuously variable transmission according to claim 2, wherein each pair of strip-shaped holes (13) in said two discs (11) are at the same angle to said axle shaft (3).

4. A ratchet chain type continuously variable transmission according to claim 3, wherein the edges of the strip-shaped hole (13) are provided with concave arc grooves.

5. A ratchet chain type continuously variable transmission device according to claim 1, wherein said branch ratchet sprocket (5) is provided in number of 6; the pawl (16) is arranged on the branch ratchet chain wheel (5); the ratchet chain wheel (5) on the driving wheel (14) is provided with a pawl (16), the ratchet chain wheel (5) on the driven wheel (15) is provided with a pawl (16), and the pawls (16) on the driving wheel and the driven wheel point to the direction slightly; and the corresponding positions of the axes of the pawls (16) are different.

6. A ratchet chain type continuously variable transmission device according to claim 1, wherein said driving pulley (14) and said driven pulley (15) are each provided with a plurality of sub-ratchet and sprocket assemblies in a circumferential direction; the branch ratchet chain wheel assembly comprises two sliding blocks (9) and a branch ratchet chain wheel (5); the two sliding blocks (9) connected to the same branch ratchet chain wheel (5) are perpendicular to the small axis of the branch ratchet chain wheel (5) and parallel to the wheel surface of the branch ratchet chain wheel (5), and the distance between the two sliding blocks (9) is the distance between the two wheels (11) on the wheel disc assembly. Each sliding block (9) is formed by connecting two sub-sliding blocks through one bullet; convex arc edges are arranged on the edges on the two sides of the sliding block (9) and are matched with concave arc grooves on the edges on the two sides of the strip-shaped hole (13). Shafts at two ends of each branch ratchet chain wheel (5) are respectively inserted into a pair of corresponding strip-shaped holes (13) through a pair of sliding blocks (9), the branch ratchet chain wheels (5) are positioned between two wheel discs (11), shafts at two ends of each branch ratchet chain wheel (5) are respectively positioned in the corresponding strip-shaped holes (13), and a small shaft and a main shaft of each branch ratchet chain wheel (5) are parallel to a main shaft (3) on the wheel disc assembly and are used for the sliding blocks (9) to carry the branch ratchet chain wheels (5) to reciprocate along the strip-shaped holes (13) in a track; after the two sliding blocks (9) connected to the same branch ratchet chain wheel (5) are inserted into a pair of corresponding strip-shaped holes (13), one end, close to the general shaft (3), of each sliding block is provided with a concave trapezoidal groove, the upper trapezoidal bottom of each sliding block is located at one end, close to the general shaft (3), of the sliding block, and the length distances between the two sliding blocks (9) and the sliding blocks are different when the sliding blocks are arranged on the same branch ratchet chain wheel (5). The connecting line between the grooves of each pair of sliding blocks (9) forms an angle with the axial direction.

7. A ratchet chain continuously variable transmission device according to claim 1, wherein said transmission belt (4) comprises three ratchet chains (12) and two v-belts (19); the two triangular belts (19) are arranged on two sides of the cross section of the transmission belt, and the three ratchet chains (12) are connected with the two triangular belts (18) through pin shafts (17). The ratchet sections of the three ratchet chains (12) are the same, wherein the ratchet arrangement direction of the two ratchet chains (12) at the side edge of the transmission belt is opposite to the ratchet arrangement direction of the ratchet chain (12) at the middle of the transmission belt.

8. A ratchet chain type continuously variable transmission as claimed in claim 1, wherein said radius adjusting means pyramid comprises a flange, 6 right triangular steel blocks (6) and a section of steel tube (10); the radius of the central hole of the flange is equal to the radius of the steel pipe, the central hole of the flange is sleeved on the main shaft (3), and the central hole of the flange can slide back and forth relative to the main shaft (3); the same trapezoid shape is protruded on each die section of the hypotenuse of the right-angled triangle steel block (6), and the edge surface of the hypotenuse is the lower bottom surface of the trapezoid.

The right-angle triangular steel blocks (6) are distributed and fixed on one surface of the flange, and the short right-angle side of each right-angle triangular steel block (6) is connected with the surface of the flange; the right angle of the flange is close to the center of the flange; the intersection angle point of the inclined side and the short right-angle side is close to the circumferential direction of the flange. And the surface of each right-angle triangular steel block (6) is vertical to the flange surface; the steel pipe (10) is vertically fixed on a central hole on the other surface of the flange and is used for driving a handle of the radius adjusting device pyramid; each right-angled triangle steel block (6) is inserted into the strip-shaped space (13) on the pyramid, the angle of the bevel edge is also coincided with the angle formed by the connecting line between each pair of grooves of the sliding blocks (9) and the axial direction, and the angles are complementary angles and are matched with each other; meanwhile, the concave trapezoidal grooves of the sliding blocks (9) are matched with the convex trapezoids of the cross sections on the bevel edge of the pyramid; therefore, the bevel edge of each right-angled triangle steel block (6) on the pyramid protrudes out of the trapezoidal cross section and can be inserted into the trapezoidal concave grooves of the corresponding pair of sliding blocks (9).

9. A ratchet chain type continuously variable transmission according to claim 8, wherein said steel tube (10) is connected to an output shaft of said hydraulic pump (2) through a bearing (7) and a rod (8), said rod (8); the hydraulic pumps (2) are fixed on the lower parts of the two hydraulic pumps.