CN107178597B - Lever type rigid large-torque stable-transmission stepless speed changer - Google Patents

Abstract

The invention provides a lever type rigid large-torque stable transmission stepless speed changer, which aims at solving the problem that the stepless speed changer has no fluctuation and stable transmission and cannot be compatible with rigid large-torque transmission in the prior art. The device mainly comprises a fixing frame for arranging each part, a power input unit for converting input rotation into reciprocating linear motion, a speed change unit for converting the scaled lever for reciprocating linear motion into rotation, and a power output unit for outputting the rotation at a fixed position after speed change. The stepless speed changer can realize non-friction rigid high-torque transmission, can realize non-fluctuation stable transmission from a power input end to an output end, can realize continuous change from zero rotation of the output end to over rotation speed of the input end, and achieves the purpose of stepless speed change.

Description

Lever type rigid large-torque stable-transmission stepless speed changer

Technical Field

The invention relates to a transmission in the field of mechanical transmission, in particular to a lever type rigid large-torque stable transmission stepless transmission.

Background

The prior art of mechanical transmission is classified into a stepped transmission and a continuously variable transmission. The existing continuously variable transmission is mainly driven by friction resistance instead of rigid driving, and is limited by the friction resistance, so that the torque of the continuously variable transmission cannot be very large, the transmission ratio cannot be very large, and otherwise, the continuously variable transmission can slip; some continuously variable transmissions are designed to be rigid transmissions that do not rely on frictional resistance, but are not smooth and have fluctuations in transmission.

Disclosure of Invention

The invention provides a lever type rigid large-torque stable transmission continuously variable transmission, which aims to solve the problem that the continuously variable transmission in the prior art cannot be compatible with rigid large-torque transmission.

The invention adopts the technical proposal for solving the problems that: a lever-type rigid high-torque stable-transmission stepless speed changer is a stepless speed changer which adopts a method of converting rotation into reciprocating linear motion and then converting the reciprocating linear motion into rotation after scaling by a lever equal ratio. Comprises a fixing frame, a power input unit, a speed changing unit and a power output unit. The power input unit comprises a power input shaft, a parallel chain mechanism, a fixed rail and a main pushing block which is slidably arranged on the fixed rail; the speed change unit comprises a lever, a lifting rail, a rail lifting guide device, a driven pushing block, a right overrunning clutch, a left overrunning clutch, a driving belt I and a rotation integration device, wherein the lifting rail is arranged parallel to the fixed rail, the rail lifting guide device drives the lifting rail to move in parallel, the driven pushing block is slidably arranged on the lifting rail, the right overrunning clutch and the left overrunning clutch are arranged at two ends of the lifting rail and have opposite idling directions, the driving belt I bypasses the right overrunning clutch and the left overrunning clutch and is fixedly connected to two sides of the driven pushing block to form a closed loop, and the rotation integration device is arranged at one side of the lifting rail; the power output unit comprises a driving wheel, a transmission belt III, a guide wheel I, a guide wheel II, a driven wheel I, a power output shaft and a driven wheel II fixedly arranged on the power output shaft, wherein the driving wheel receives output rotation of the speed change unit, and rotation of the driving wheel is transmitted to the power output shaft through the transmission belt III for output.

In the transmission, a fixing frame is used for arranging all parts; the power input unit converts rotation input by the prime motor into reciprocating linear motion, namely: the rotation from the prime motor drives the parallel chain mechanism through the power input shaft, and the parallel chain mechanism drives the main pushing block to do reciprocating linear motion on the fixed track; the speed changing unit converts the scaled reciprocating rectilinear motion with lever equal ratio into rotation, namely: the main pushing block which does reciprocating rectilinear motion drives the lever to swing around the fulcrum of the lever, the lever drives the auxiliary pushing block again and does reciprocating rectilinear motion parallel to the main pushing block on the lifting track, and then the right overrunning clutch and the left overrunning clutch at two ends of the lifting track are driven by the driving belt I, the reciprocating rectilinear motion of the auxiliary pushing block is converted into rotation of the right overrunning clutch and the left overrunning clutch, and the rotation is output through the right central shaft of the right overrunning clutch and the left central shaft of the left overrunning clutch. The rotation integrating device is positioned at one side of the lifting track and integrates the rotation output by the right central shaft and the left central shaft into one rotation for output.

According to the principle of equal ratio, the ratio of the movement speeds of the slave pushing block and the main pushing block and the ratio of the vertical distance between the lever swinging fulcrum and the straight line where the slave pushing block and the main pushing block move are equal, namely under the condition that the movement speed of the main pushing block is fixed, the speed of the slave pushing block is in direct proportion to the vertical distance between the lever swinging fulcrum and the lifting track. The distance between the lifting track and the swinging fulcrum of the lever is continuously changed through the track lifting guide device, so that the speed of the driven pushing block can be continuously changed, the output rotation speed is continuously changed, and the purpose of stepless speed change is achieved; the power output unit outputs the rotation which is output by the speed change unit and moves along with the lifting track to the power output shaft with a fixed position.

The fixing frame comprises a top plate and a bottom plate which are arranged in parallel, and a plurality of supporting rods which are vertically connected with the bottom plate are respectively arranged at four corners of the top plate. The fixing frame is provided with a bearing seat and the like for installing each part.

The parallel chain mechanism consists of two groups of identical chain sprocket systems which are distributed in a mirror symmetry mode and a long pin shaft. Each group of chain and chain wheel system comprises two chain wheels, a chain which bypasses the two chain wheels to form a closed loop and a driving gear which is coaxially driven by one of the chain wheels. In the parallel chain mechanism, two chains are positioned in the middle, two driving gears are positioned at two sides, the two chains are parallel, a gap is arranged in the middle, and two end parts of a long pin roll are respectively used as pin rolls of corresponding chain links of the two chains to connect the two chains. The power input shaft is provided with two gears which are coaxially driven by the power input shaft and are respectively meshed with two driving gears in the parallel chain mechanism, and the power input shaft drives two chains in the parallel chain mechanism to synchronously rotate through the gears.

The main pushing block consists of a main peripheral body and a main core body, and the main core body is arranged in a cavity of the main peripheral body through shafts positioned on two sides of the main core body. The main core body is slidably arranged on the lever, and the main peripheral body is slidably arranged on the fixed rail through sliding devices I which are arranged on two sides of the main peripheral body and correspond to the guide rail. One side of the main peripheral body, which is close to the parallel chain mechanism, is hinged with the long pin shaft through a connecting rod, so that the main pushing block can do reciprocating linear motion on the fixed track along with the rotation of the parallel chain mechanism.

The fixing rail consists of two mutually parallel guide rails, two ends of the fixing rail are fixedly arranged on a bottom plate arranged at the bottom of the fixing frame through supports positioned on two opposite sides of the bottom of the fixing frame, and the fixing rail is parallel to the bottom plate after being arranged.

Preferably, an extension platform is arranged on the outer side of the bottom plate of the fixing frame along the direction of the fixing rail, the power input shaft and the parallel chain mechanism are arranged on the extension platform, and the direction of the connecting line of the axes of two chain wheels in the chain and chain wheel system is parallel to the guide rail of the fixing rail.

The lifting rail consists of two mutually parallel guide rails, the rail lifting guide device consists of two sets of lifting devices arranged on two opposite sides of the fixing frame, each set of lifting device comprises two guide rods, a screw rod and a cross beam, the guide rods and the screw rods are vertically connected with the top plate and the bottom plate, the guide rods are connected with sliding blocks in a sliding fit manner, the screw rods are provided with moving blocks in a matching threaded manner, two ends of the cross beams are respectively fixedly connected with the sliding blocks on the two guide rods, the middle of the cross beams is fixedly connected with the moving blocks on the screw rods, and the cross beams are parallel to the bottom plate. The two ends of the lifting rail are respectively and fixedly connected to the two sets of lifting devices, the guide rail of the lifting rail is parallel to the guide rail of the fixed rail after connection, and the lifting rail can be moved in parallel through synchronous rotation of the two screws.

The secondary pushing block consists of a secondary peripheral body and a secondary core body, and the secondary core body is arranged in a cavity of the secondary peripheral body through shafts positioned on two sides of the secondary core body. The secondary core body is slidably arranged on the lever, the secondary peripheral body is slidably arranged on the lifting rail through sliding devices II which are arranged on the two sides of the secondary peripheral body and correspond to the lifting rail, and the secondary peripheral body is fixedly connected with the two ends of the driving belt I.

In the invention, the main pushing block and the auxiliary pushing block are similar in structure and are composed of inner and outer parts, the inner part is arranged in the cavity of the outer part through the bearing, the outer part can freely slide on the track, the inner part can freely slide on the lever, and the inner part can swing relative to the outer part.

The lever is a long and straight rod, the top end of the lever is provided with an inverted U-shaped frame, and two ends of the inverted U-shaped frame are respectively rotatably arranged in two bearing seats arranged on the lower surface of the top plate of the fixing frame. The main pushing block is arranged at the lower end of the lever, the auxiliary pushing block is arranged in the middle of the lever, the auxiliary pushing block can move along with the lifting rail in the range from the lower end to the upper end of the lever, the inverted U-shaped frame at the top end of the lever can enable the auxiliary pushing block to move along with the lifting rail to the position of a lever swinging fulcrum, at the moment, the lever swings and the auxiliary periphery of the auxiliary pushing block is not moved, and then overrunning clutches at two ends of the lifting rail do not output rotation.

The rotary integration device is arranged on one side of the lifting track and comprises a gear I fixedly arranged at one end of a left central shaft, a reversing gear arranged in an external meshed mode with the gear I, a driving wheel I fixed with the reversing gear together, a driving wheel II fixedly arranged at one end of a right central shaft, and a driving belt II bypassing the driving wheel I and the driving wheel II to form a closed loop. The rotation directions of the central shaft outputs of overrunning clutches at two ends of the lifting track are opposite, the left central shaft rotates and is output through a gear I, and then the left central shaft is transmitted to the right central shaft through a transmission belt II after the direction of the left central shaft is changed through a reversing gear. In the transmission process, the transmission ratio from the left central shaft to the right central shaft can be adjusted by adjusting the diameter ratio of the gear I to the reversing gear or the diameter ratio of the transmission wheel I to the transmission wheel II.

In the power output unit, a driving wheel is fixedly arranged on a right central shaft of a right overrun clutch of a lifting track, a driven wheel I is arranged on the lower surface of a top plate, a driven wheel II is fixedly arranged on a power output shaft, the power output shaft is arranged on the upper surface of a bottom plate through a bearing seat, the lifting track is arranged on the side surface of one side of the driving wheel, guide wheels I and guide wheels II are respectively arranged on the upper side and the lower side of the driving wheel, and a driving belt III sequentially bypasses the driven wheel I, the guide wheels I, the driving wheel, the guide wheels II and the driven wheel II to form a closed loop. The part of the transmission belt III between the driven wheel I and the guide wheel I, the part of the transmission belt III between the guide wheel II and the driven wheel II and the moving direction of the lifting track are parallel, so that the length of the transmission belt III is unchanged in the moving process of the lifting track.

In the invention, the idle rotation is taken as an example when the outer ring of the left overrunning clutch rotates clockwise relative to the inner ring; in the present invention, the rotation integrating device integrates the rotation output by the right central shaft and the left central shaft to the output of the right central shaft.

In the invention, if the rotation input by a prime mover is uniform, the main pushing block makes uniform linear motion when the long pin shafts are arranged on the upper side and the lower side of the chain wheel, the auxiliary pushing block also makes uniform linear motion, and finally the right center shaft of the right overrunning clutch at the right end of the lifting track outputs clockwise uniform rotation; when the long pin shaft moves to the chain wheel, the main pushing block can be decelerated to zero and change the direction, and at the moment, the rotation speed of the right central shaft output is reduced or no rotation output is generated. In the whole process, the output rotation of the right central shaft is a cycle of clockwise uniform rotation, output rotation speed reduction and clockwise uniform rotation. Preferably, a plurality of groups of power input units, speed changing units and power output units are connected in parallel to form a speed changer, so that uniform rotation output among the groups is connected with uniform rotation, and the speed changer finally outputs continuous uniform rotation, thereby achieving the purpose of stable transmission.

Furthermore, in order to reduce the size of the transmission, the main core body of the main pushing block can be directly used for replacing a long pin shaft in a parallel chain mechanism to connect two chains, and the shafts on two sides of the main core body are used as pin shafts of corresponding chain links of the two chains. Even if the chain directly drives the main core body, the connecting rod is not used for driving the main pushing block. Under the condition, an extension platform at the outer side of the bottom plate of the fixed frame and a fixed track on the bottom plate of the fixed frame can be canceled, and the power input shaft and the parallel chain mechanism are arranged at the bottom of the fixed frame. In the design, when the main core is respectively arranged on the upper side and the lower side of the chain wheel, the vertical distance between the swinging branch point of the lever and the straight line where the main core moves is inconsistent, so that the speeds of the left and right movements of the pushing blocks are inconsistent, and the output rotation speeds of the overrunning clutch central shafts at the two ends of the lifting track are inconsistent.

Furthermore, the main pushing block can be driven by a chain (such as the upper side) on one side of the chain wheel in the parallel chain mechanism, the main pushing block is returned on the other side (the lower side) of the chain wheel, and correspondingly, the overrunning clutch can be used on the corresponding end of the lifting rail, the general driving wheel is used on the other end of the lifting rail, and the rotation integration device on one side of the lifting rail is canceled.

The beneficial effects are that: the transmission among the components of the invention is rigid, so that the invention can be used for large torque transmission; the uniform rotation is converted into the reciprocating linear motion, and then the reciprocating linear motion is scaled by a lever in equal ratio and then is converted into the uniform rotation, so that the transmission is ensured to have no fluctuation, the output rotation is uniform, and the purpose of rigid large-torque stable transmission is achieved. The input end rotating speed can be stably transmitted to the output end without fluctuation, and the output end rotating speed is opposite to the input end rotating speed, so that the continuous change from zero to over the input end rotating speed can be realized, and the purpose of stepless speed change is achieved.

Drawings

FIG. 1 is a schematic diagram of example 1;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a schematic diagram of example 2;

FIG. 4 is a front view of FIG. 3;

FIG. 5 is a schematic diagram of example 3;

FIG. 6 is a right side view of FIG. 5;

FIG. 7 is a schematic diagram of example 4;

FIG. 8 is a right side view of bitmap 7;

FIG. 9 is a schematic diagram of a parallel chain mechanism according to the present invention;

FIG. 10 is a top view of FIG. 9;

FIG. 11 is a schematic view of a main pusher block;

FIG. 12 is a schematic view from the pusher block;

FIG. 13 is a schematic view of a portion of a lifting rail according to the present invention;

FIG. 14 is a top view of FIG. 13;

fig. 15 is a schematic diagram of output rotational speeds of embodiment 1 and embodiment 2.

Reference numerals: 1. the device comprises a fixing frame, 101, a top plate, 102, a bottom plate, 103, a supporting rod, 104 and a bearing seat; 2. a power input shaft 201 and a gear; 3. the parallel chain mechanism comprises a chain 301, a chain 302, a chain wheel 303, a driving gear 304 and a long pin shaft; 305. a connecting rod; 4. a fixed rail, 5, a main pushing block, 501, a main peripheral body, 502, a main core body, 503 and a sliding device I; 6. a lever 601, an inverted U-shaped frame; 7. lifting rails, 8, rail lifting guide devices, 801, guide rods, 802, sliding blocks, 803, cross beams, 804, screws, 805 and moving blocks; 9. from the pushing block 901, from the peripheral body, 902, from the core body, 903, sliding device II; 10. the device comprises a right overrunning clutch 11, a left overrunning clutch 12, a right central shaft 13, a left central shaft 14, a transmission belt I, 15, a rotation integration device 1501, gears I, 1502, a reverse gear 1503, a transmission belt II, 1504, a transmission wheel I, 1505 and a transmission wheel II; 16. driving wheel, 17, driving belt, III, 18, guide wheel, I, 19, guide wheel, II, 20, driven wheel, I, 21, driven wheel, II, 22 and power output shaft.

Detailed Description

The present invention will be further described with reference to specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the present invention and practice it.

Any feature disclosed in this specification (including any accompanying claims, abstract) may be replaced by alternative features serving the equivalent or similar purpose, unless expressly stated otherwise. That is, each feature is one example only of a generic series of equivalent or similar features, unless expressly stated otherwise.

A lever type rigid large-torque stable transmission stepless speed changer adopts a method of converting rotation into reciprocating linear motion and then converting the reciprocating linear motion into rotation after scaling by a lever equal ratio, and comprises a fixing frame 1, a power input unit, a speed changing unit and a power output unit. Wherein, the main constitution of power input unit is: a power input shaft 2, a parallel chain mechanism 3, a fixed track 4, and a main pushing block 5 slidably mounted on the fixed track 4; the main constitution of the speed change unit is: the lever 6, the lifting rail 7 that is parallel to the fixed rail 4, the rail lifting guiding device 8 that moves the lifting rail 7 in parallel, the slave pushing block 9 that is installed on the lifting rail 7 in a sliding manner, two right overrunning clutches 10 and left overrunning clutches 11 that are arranged at two ends of the lifting rail 7 and have opposite idling directions, a driving belt I14 that bypasses the right overrunning clutches 10 and the left overrunning clutches 11 and is fixedly connected to two sides of the slave pushing block 9 to form a closed loop, and a rotation integrating device 15 that is arranged at one side of the lifting rail 7 and mainly comprises a reversing gear 1502 and a driving belt II 1503; the main constitution of the power output unit is: the driving wheel 16, the transmission belt III 17, the guide wheel I18, the guide wheel II 19, the driven wheel I20, the power output shaft 22 and the driven wheel II 21 fixedly arranged on the power output shaft 22 are used for receiving the output rotation of the speed changing unit, and the rotation of the driving wheel 16 is transmitted to the power output shaft 22 through the transmission belt III 17 for output.

The fixing frame 1 mainly comprises a top plate 101 and a bottom plate 102 which are arranged in parallel, and four supporting rods 103 which are vertically connected with the bottom plate 102 are respectively arranged at four corners of the top plate 101. The mount 1 is provided with a bearing housing 104 and the like for mounting the respective components.

In the transmission, a fixing frame 1 is used for arranging all parts; the power input unit converts the rotation input by the prime motor into reciprocating linear motion, the rotation from the prime motor drives the parallel chain mechanism 3 through the power input shaft 2, and the parallel chain mechanism 3 drives the main pushing block 5 to do reciprocating linear motion on the fixed track 4; the speed change unit converts the scaled reciprocating rectilinear motion into rotation after the lever is scaled in equal ratio, the main pushing block 5 which carries out reciprocating rectilinear motion drives the lever 6 to swing around the fulcrum of the lever, the lever 6 drives the auxiliary pushing block 9 again, the auxiliary pushing block 9 carries out reciprocating rectilinear motion parallel to the main pushing block 5 on the lifting track 7, further the right overrunning clutch 10 and the left overrunning clutch 11 at the two ends of the lifting track 7 are driven by the driving belt I14, the reciprocating rectilinear motion of the auxiliary pushing block 9 is converted into rotation of the right overrunning clutch 10 and the left overrunning clutch 11, the rotation is output through the right central shaft 12 of the right overrunning clutch 10 and the left central shaft 13 of the left overrunning clutch 11, and the rotation integration device 15 integrates the output rotation of the right central shaft 12 and the left central shaft 13 into one rotation and outputs.

According to the principle of equal ratio, the ratio of the movement speeds of the slave pushing block 9 and the master pushing block 5 and the ratio of the vertical distance between the lever swinging fulcrum and the straight line where the slave pushing block 9 and the master pushing block 5 move are equal, and under the condition that the movement speed of the master pushing block 5 is fixed, the speed of the slave pushing block 9 is in direct proportion to the vertical distance between the lever 6 swinging fulcrum and the lifting track 7; the distance between the lifting track 7 and the swinging fulcrum of the lever 6 is continuously changed through the track lifting guide device 8, so that the speed of the driven pushing block 9 can be continuously changed, the output rotation speed is continuously changed, and the purpose of stepless speed change is achieved; the power output unit outputs the rotation output by the speed change unit along with the movement of the lifting rail 7 to the power output shaft 22 with a fixed position.

As shown in fig. 9 and 10, the parallel chain mechanism 3 is composed of two identical chain sprocket systems distributed in mirror symmetry and a long pin 304. Each set of chain sprocket system comprises two sprockets 302, a chain 301 that bypasses the two sprockets 302 to form a closed loop, and a drive gear 303 that is coaxially driven with one of the sprockets 302. In the parallel chain mechanism 3, two chains 301 are positioned in the middle, two driving gears 303 are positioned at two sides, the two chains 301 are parallel, a gap is arranged in the middle, and two end parts of a long pin shaft 304 are respectively used as pin shafts of corresponding links of the two chains 301 to connect the two chains 301. The power input shaft 2 is provided with two gears 201 which are coaxially driven and respectively meshed with two driving gears 303 in the parallel chain mechanism 3, and the power input shaft 2 drives two chains 301 in the parallel chain mechanism 3 to synchronously rotate through the gears 201.

The fixed rail 4 is composed of two parallel guide rails, two ends of the fixed rail are fixedly arranged on the bottom plate 102 of the fixed frame 1 through supports positioned on two opposite sides of the bottom of the fixed frame 1, and the fixed rail is parallel to the bottom plate 102 after being arranged.

Preferably, an extension platform is arranged on the outer side of the bottom plate 102 of the fixing frame 1 along the direction of the fixed track 4, the power input shaft 2 and the parallel chain mechanism 3 are arranged on the extension platform, and the direction of the connecting line of the axes of the two chain wheels 302 in the chain and chain wheel system is parallel to the guide rail of the fixed track 4.

As shown in fig. 1 and 11, the main pushing block 5 is composed of a main outer peripheral body 501 and a main core body 502, and the main core body 502 is mounted in a cavity of the main outer peripheral body 501 by shafts located at both sides thereof. The main core 502 is slidably mounted on the lever 6, and the main outer body 501 is slidably mounted on the fixed rail 4 by sliding means i 503 corresponding to the guide rail on both sides thereof. One side of the main peripheral body 501, which is close to the parallel chain mechanism 3, is hinged with the long pin shaft 304 through the connecting rod 305, so that the main pushing block 5 can do reciprocating linear motion on the fixed track 4 along with the rotation of the chain 301. If the input rotation is uniform, the main pushing block 5 moves linearly at uniform speed when the long pin shaft 304 is on the upper and lower sides of the sprocket 302, and the main pushing block 5 gradually decelerates to zero and changes the movement direction when the long pin shaft 304 moves onto the sprocket 302. Because the pushing of the chain 301 to the main pushing block 5 is a pushing mode of a double-chain parallel middle pin shaft, a larger pushing force can be output.

As shown in fig. 1 and 3, the lifting track 7 is composed of two parallel guide rails, the track lifting guide device 8 is composed of two sets of lifting devices arranged on two opposite sides of the fixing frame 1, each set of lifting device comprises two guide rods 801, a screw 804 and a cross beam 803, the guide rods 801 and the screw 804 are vertically connected with the top plate 101 and the bottom plate 102, the guide rods 801 are connected with sliding blocks 802 in a sliding fit manner, the screw 804 is provided with moving blocks 805 in a matching threaded connection manner, two ends of the cross beam 803 are respectively fixedly connected with the sliding blocks 802 of the two guide rods 801, the middle of the cross beam 803 is fixedly connected with the moving blocks 805 on the screw 804, and the cross beam 803 is parallel to the bottom plate 102. The two ends of the lifting track 7 are respectively and fixedly connected to the two sets of lifting devices, and the guide rail of the lifting track 7 after connection is parallel to the guide rail of the fixed track 4. By the synchronous rotation of the two screws 804, the lifting rail 7 can be moved in parallel.

As shown in fig. 1 and 12, the slave pusher 9 is composed of a slave peripheral body 901 and a slave core body 902, and the slave core body 902 is mounted in a cavity of the slave peripheral body 901 via shafts on both sides thereof. The core body 902 is slidably mounted on the lever 6, the outer body 901 is slidably mounted on the lifting rail 7 through sliding devices II 903 which are arranged on two sides of the outer body 901 and correspond to the guide rails in the lifting rail 7, and the two sides of the outer body 901 are fixedly connected with two ends of the driving belt I14.

The lever 6 is a long and straight rod, the top end of the lever is provided with an inverted U-shaped frame 601, and two ends of the inverted U-shaped frame 601 are respectively rotatably installed in two bearing seats 104 arranged on the lower surface of the top plate 101 of the fixing frame 1. The main pushing block 5 is arranged at the lower end of the lever 6, the auxiliary pushing block 9 is arranged in the middle of the lever 6, the auxiliary pushing block 9 can move along with the lifting rail 7 in the range from the lower end to the upper end of the lever 6, and the inverted U-shaped frame 601 at the top end of the lever 6 can enable the auxiliary pushing block 9 to move along with the lifting rail 7 to the position of the swinging fulcrum of the lever 6. At this time, the lever 6 swings, and the slave peripheral body 601 of the slave pushing block 6 is not moved, so that the right overrunning clutch 10 and the left overrunning clutch 11 at both ends of the lifting rail 7 do not output rotation.

As shown in fig. 13 and 14, the rotation integration device 15 is disposed on one side of the lifting rail 7, and is mainly configured to: the gear I1501 fixedly arranged at one end of the left central shaft 13, the reversing gear 1502 externally meshed with the gear I1501, the driving wheel I1504 fixed with the reversing gear 1502, the driving wheel II 1505 fixedly arranged at one end of the right central shaft 12 and the driving wheel II 1505 bypassing the driving wheel I1504 form a closed-loop driving belt II 1503. The right overrunning clutch 10 at the two ends of the lifting track 7, the right central shaft 12 of the left overrunning clutch 11 and the left central shaft 13 output in opposite rotation directions, the left central shaft 13 rotates and is output through the gear I1501, and then the direction is changed through the reversing gear 1502 and then is transmitted to the right central shaft 12 through the transmission belt II 1503. In the transmission process, the transmission ratio of the left central shaft 13 to the right central shaft 12 can be further adjusted by adjusting the diameter ratio of the gear I1501 to the reversing gear 1502 or the diameter ratio of the transmission wheel I1504 to the transmission wheel II 1505.

In which the lever 6 swings with the reciprocating movement of the main pushing block 5. The slave pushing block 9 makes a reciprocating linear motion similar to the master pushing block 5 on the lifting rail 7 along with the swinging of the lever 6. An elongated opening is provided in the middle of the belt I14, through which the lever 6 can pass, so that the lever 6 and the belt I14 do not interfere with each other during movement. When the pushing block 9 moves leftwards under the drive of the lever 6, the right overrunning clutch 10 and the outer ring of the left overrunning clutch 11 at the two ends of the lifting track 7 are driven by the driving belt I14 to rotate clockwise, at the moment, the outer ring of the right overrunning clutch 10 drives the inner ring to rotate, and the clockwise rotation is output through the right central shaft 12, and the outer ring of the left overrunning clutch 11 rotates idly relative to the inner ring; when the pushing block 9 moves rightwards, the right overrunning clutch 10 and the outer ring of the left overrunning clutch 11 at the two ends of the lifting track 7 are driven to rotate anticlockwise through the driving belt I14, at the moment, the outer ring of the right overrunning clutch 10 rotates idle relative to the inner ring, the outer ring of the left overrunning clutch 11 drives the inner ring to rotate, the left overrunning clutch 13 outputs anticlockwise rotation, and then the left overrunning clutch and the left overrunning clutch are driven to the clockwise output of the right central shaft 12 after being changed through the rotation integration device 15 at one side of the lifting track 7. The lifting rail 7 is matched with the rail lifting guide device 8, so that the movement of the auxiliary pushing block 9 is ensured to be linear movement parallel to the movement of the main pushing block 5, the distance between the linear movement of the auxiliary pushing block 9 and the swinging fulcrum of the lever can be adjusted, the movement speed of the auxiliary pushing block 9 is further adjusted, and the output rotation speed of the power output shaft 22 is finally changed.

In the power output unit, as shown in fig. 1, 3, 13 and 14, a driving wheel 16 is fixedly installed on a right central shaft 12 of a right overrunning clutch 10, a driven wheel i 20 is installed on the lower surface of a top plate 101, a driven wheel ii 21 is fixedly installed on a power output shaft 22, the power output shaft 22 is installed on the upper surface of a bottom plate 102 through a bearing seat 104, a lifting rail 7 is arranged on a side surface of one side of the driving wheel 16, guide wheels i 18 and ii 19 are respectively arranged on the upper side and the lower side of the driving wheel 16, and a driving belt iii 17 sequentially bypasses the driven wheel i 20, the guide wheels i 18, the driving wheel 16, the guide wheels ii 19 and the driven wheel ii 21 to form a closed loop. The part of the driving belt III 17 between the driven wheel I20 and the guide wheel I18, and the part of the driving belt III 17 between the guide wheel II 19 and the driven wheel II 21 are parallel to the moving direction of the lifting rail 7, so that the length of the driving belt III 17 is unchanged in the moving process of the lifting rail 7.

The power input unit, the speed changing unit and the power output unit are at least one group, and a plurality of groups of power input units, speed changing units and power output units can be connected in parallel.

In the invention, input rotation (taking clockwise rotation of the input rotation as uniform speed as an example) is input by the power input shaft 2, as shown in fig. 9, the power input shaft 2 drives two chains 301 to synchronously rotate anticlockwise through a gear 201 on the power input shaft and a driving gear 303 in the parallel chain mechanism 3, so as to drive a long pin shaft 304 to move; when the long pin 304 is on the upper side of the sprocket 302, it makes a uniform linear motion to the left, gradually decelerates to zero and changes direction to move to the right when it is on the left sprocket 302, and when the pin 304 reaches the lower side of the sprocket 302, it makes a uniform linear motion to the right, gradually decelerates to zero and changes direction to move to the left when it is on the right sprocket 302, and reciprocally circulates. As shown in fig. 1, the long pin shaft 304 drives the main pushing block 5 to do reciprocating rectilinear motion on the fixed track 4 through the connecting rod 305, the motion of the main pushing block 5 is uniform rectilinear motion in the middle section, and gradually decelerates to zero and changes direction at two sides. The main pushing block 5 drives the lever 6 to swing, the lever 6 further drives the auxiliary pushing block 9 to do reciprocating linear motion similar to the main pushing block 5 on the lifting track 7, namely uniform linear motion is achieved at a middle section, and the two sides of the main pushing block gradually decelerate to zero and change directions. The outer rings of the right overrunning clutch 10 and the left overrunning clutch 11 are driven to rotate by the pushing block 9 through the driving belt I14. When the pushing block 9 moves leftwards, the right overrunning clutch 10 drives the right central shaft 12 to output clockwise rotation; when moving from the pushing block 9 to the right, the left overrunning clutch 11 drives the left central shaft 13 to output counterclockwise rotation, and then the counterclockwise rotation is changed in direction and then output clockwise at the right central shaft 12 through the rotation integrating device 15. The right central shaft 12 drives the driving wheel 16 to rotate, and then drives the power output shaft 22 to finally output clockwise rotation through the transmission belt III 17, and the output rotation speed schematic diagram is shown in fig. 15. The distance between the lifting track 7 and the swinging fulcrum of the lever 6 can be continuously changed through the track lifting guide device 8, so that the speed of the pushing block 9 can be continuously changed, the rotation speed output by the central shaft 12 can be further changed, and finally, the speed of the power output shaft 22 can be continuously changed, thereby achieving the purpose of stepless speed change.

Example 1

The utility model provides a lever rigidity large torque steady transmission continuously variable transmission, the continuously variable transmission of this embodiment is taking the connecting rod formula structure, and its specific structure is as shown in fig. 1, fig. 2, and this continuously variable transmission includes mount 1 and all establishes power input unit, speed change unit and the power take off unit on mount 1, and power input unit, speed change unit and power take off unit are a set of, and the specific structure of each part references above-mentioned setting. In this continuously variable transmission, the power input shaft 2 and the parallel chain mechanism 3 are provided on an extension platform outside the bottom plate 102 of the fixed frame 1, and the parallel chain mechanism 3 is connected to the main pushing block 5 slidably mounted on the fixed rail 4 via a link 305.

Example 2

The embodiment is to reduce the size of the transmission, and adopts a non-connecting rod type structure, the specific structure of which is shown in fig. 3 and 4, the stepless transmission comprises a fixed frame 1, and a power input unit, a speed change unit and a power output unit which are all arranged on the fixed frame 1, the power input unit, the speed change unit and the power output unit are all a group, and the specific structure of each component refers to the arrangement. In the continuously variable transmission, an extension platform outside a bottom plate 102 of a fixed frame is omitted, a fixed track 4 on the bottom plate 102 of the fixed frame is omitted, a power input shaft 2 and a parallel chain mechanism 3 are arranged on the bottom plate 102 of the fixed frame 1, a main core 502 of a main pushing block 5 is directly used for replacing a long pin shaft 304 in the parallel chain mechanism 3 to connect two chains 301, and shafts on two sides of the main core 502 serve as pin shafts of corresponding links of the two chains 301. Even if the chain 301 directly drives the main core 502 and thus the lever 6, the link 305 is not used to drive the main pushing block 5 and thus the lever 6. In this case, when the main core 502 is located at the upper and lower sides of the sprocket 302, the vertical distance between the swing point of the lever 6 and the straight line where the main core 502 moves is inconsistent, so that the speeds of the left and right movements of the pushing block 9 are inconsistent, and the rotational speeds of the overrunning clutch central shafts 12 and 13 output from the two ends of the lifting rail 7 are inconsistent, so that the transmission ratio of the rotational integration device 15 located at one side of the lifting rail 7 needs to be adjusted, and the rotational speed of the left central shaft 13 finally transmitted to the right central shaft 12 is consistent with the right central shaft 12.

Example 3

A lever type rigid large-torque stable transmission stepless speed changer is provided, the embodiment is in the form of two groups of parallel connection in the embodiment 2, and the specific structure is shown in fig. 5 and 6. In the case of two parallel connection, the power input unit and the speed change unit are two groups, and in the two groups of speed change units, one group of track lifting guide device 8 is shared, two right central shafts 12 can be combined into one right central shaft, and two left central shafts 13 can be combined into one left central shaft. Accordingly, only one set of the two sets of the rotation integration devices 15 may be reserved, and only one set of the two sets of the power output units may be reserved. In this embodiment, to output continuous smooth rotation without fluctuation, the parallel chain mechanism 3 is required, the inter-axis distance of the sprocket 302 is larger than 1/2 of the circumference thereof, and the positions of the two main cores 502 on the two sets of chains 301 are staggered by 1/4 of the chain length.

Example 4

The embodiment is a lever type rigid large-torque stable transmission stepless speed changer, which is in a three-group parallel connection mode in the embodiment 2 and consists of a fixed frame 1, three groups of power input units, a speed changing unit and a power output unit which are connected in parallel, the specific structure of the lever type rigid large-torque stable transmission stepless speed changer is shown in fig. 7 and 8, in the embodiment, only a chain at the upper part of a chain wheel 302 is used for driving a main core 502 and then driving a lever 6, and finally the right overrunning clutch 10 is driven to output rotation, and the chain at the lower part of the chain wheel 302 only returns to the lever 6. Correspondingly, the left overrunning clutch 11 at the left end of the lifting rail 7 can be replaced by a general driving wheel. In this case, the left center shaft 13 at the left end of the elevating rail 7 does not output rotation, and the rotation integrating device 15 can be eliminated. As in embodiment 3, the track lifting guide 8 is only one group, three right central shafts 12 corresponding to three groups of speed changing units can be combined into one group, and three groups of power output units can only keep 1 group. In this embodiment, to output continuous smooth rotation without fluctuation, the parallel chain mechanism 3 is required, the inter-axis distance of the sprocket 302 is larger than 1/3 of the circumference of the chain, and the positions of the three main cores 502 on the three groups of chains 301 are staggered by 1/3 of the chain length.

The above is a basic embodiment of the present invention, and further improvements, optimizations, and limitations may be made on the above basis:

for example, the chain 301 and the sprocket 302 in the chain sprocket system 3 may be replaced by a synchronous belt and a synchronous wheel;

for another example, the manner of driving the overrunning clutch from the pushing block 9 through the driving belt I14 can be changed into that of driving the overrunning clutch through a rack;

for another example, a track may be added along the path around which the chain 301 is wound, and the two ends of the long pin 304 (or from the core 502) are limited in the track, so that the long pin 304 (or from the core 502) moves in the track to offset the lateral tension of the long pin 304 (or from the core 502) on the chain 301 in the transmission process;

for another example, in the case that only one side of the chain 301 is used to drive the main pushing block 5 through the connecting rod 305, the height of the fixed rail 4 is consistent with the height of the chain 301 on the side driving the main pushing block 5, so as to avoid the lateral pulling force of the main pushing block 5 on the chain 301;

for another example, the master pushing block 5 and the slave pushing block 9 may be located at one side of the swinging fulcrum of the lever 6, or may be located at two sides of the swinging fulcrum;

for another example, two end portions of the long pin 304 may be designed in a double-shaft manner, the distance between the two shafts is equal to the pitch of the chain 301, and then the two shafts are used as pins of two pin holes of one link of the chain 301, so that the abrasion of a single pin can be reduced.

For another example, the sliding structure in the invention, such as the sliding block sliding on the guide rod, the sliding devices on the main peripheral body and the auxiliary peripheral body sliding on the guide rail, the main core body and the auxiliary core body sliding on the lever, can be both guide rail type sliding structures and guide rod type sliding structures;

for another example, if the stable and non-fluctuation of the transmission is not considered, the crank mechanism can be directly used for replacing the parallel chain mechanism 3 to drive the lever 6 to swing.

From the above description, it can be seen that the transmission between the components of the present invention is rigid, so that a high torque transmission is possible. In the speed changing process, when the swing supporting points of the lifting rail 7 and the lever 6 are on the same straight line, the slave pushing block 9 is not moved, and the rotation speed of the output end is zero. When the lifting rail 7 gradually descends to enable the slave pushing block 9 to be far away from the swinging fulcrum of the lever 6, the slave pushing block 9 gradually increases in speed, the output end rotating speed also gradually increases, and the output rotating speed is the fastest when the lower limit is reached. In theory, the rotational speed of the transmission output can be infinitely fast relative to the input by adjusting the sizes of the right overrunning clutch 10, the left overrunning clutch 11 and the subsequent driving wheels.

The technical scheme and the embodiment of the invention are not limited, and the technical scheme and the embodiment which are equivalent or have the same effect as those of the technical scheme and the embodiment of the invention are all within the protection scope of the invention.

Claims (10)

1. A lever type rigid large-torque stable transmission continuously variable transmission is characterized in that: the speed changer adopts a method of converting rotation into reciprocating rectilinear motion, then converting the reciprocating rectilinear motion into rotation after scaling by a lever with equal ratio, comprises a fixing frame (1), a power input unit, a speed changing unit and a power output unit,

the power input unit comprises a power input shaft (2), a parallel chain mechanism (3), a fixed track (4) and a main pushing block (5) which is slidably arranged on the fixed track (4);

the speed change unit comprises a lever (6), a lifting rail (7) which is parallel to the fixed rail (4), a rail lifting guide device (8) which drives the lifting rail (7) to move in parallel, a driven pushing block (9) which is slidably arranged on the lifting rail (7), two right overrunning clutches (10) and left overrunning clutches (11) which are arranged at two ends of the lifting rail (7) and have opposite idling directions, a driving belt I (14) which bypasses the right overrunning clutches (10) and the left overrunning clutches (11) and is fixedly connected to two sides of the driven pushing block (9) to form a closed loop, and a rotation integration device (15) which is arranged at one side of the lifting rail (7);

The power output unit comprises a driving wheel (16) for receiving output rotation of the speed change unit, a transmission belt III (17), a guide wheel I (18), a guide wheel II (19), a driven wheel I (20), a power output shaft (22) and a driven wheel II (21) fixedly arranged on the power output shaft (22), wherein the rotation of the driving wheel (16) is transmitted to the power output shaft (22) through the transmission belt III (17) for output;

in the transmission, a fixing frame (1) is used for arranging all parts; the power input unit converts the rotation input by the prime motor into reciprocating linear motion, the rotation from the prime motor drives the parallel chain mechanism (3) through the power input shaft (2), and the parallel chain mechanism (3) drives the main pushing block (5) to do reciprocating linear motion on the fixed track (4); the speed change unit converts the scaled reciprocating rectilinear motion into rotation after the lever is equal in ratio, the main pushing block (5) which carries out reciprocating rectilinear motion drives the lever (6) to swing around a fulcrum of the lever, the lever (6) drives the auxiliary pushing block (9) again, the auxiliary pushing block (7) carries out reciprocating rectilinear motion parallel to the main pushing block (5), further the right overrunning clutch (10) and the left overrunning clutch (11) at two ends of the lifting rail (7) are driven by the driving belt I (14), the reciprocating rectilinear motion of the auxiliary pushing block (9) is converted into rotation of the right overrunning clutch (10) and the left overrunning clutch (11), the right central shaft (12) of the right overrunning clutch (10) and the left central shaft (13) of the left overrunning clutch (11) are output, and the rotation integration device (15) integrates the output rotation of the right central shaft (12) and the left central shaft (13) into one rotation and outputs;

According to the principle of equal ratio, the ratio of the movement speeds of the slave pushing block (9) and the master pushing block (5) and the ratio of the swinging fulcrum of the lever to the vertical distance of the straight line where the slave pushing block (9) and the master pushing block (5) move are equal, and under the condition that the movement speed of the master pushing block (5) is fixed, the speed of the slave pushing block (9) is in direct proportion to the vertical distance between the swinging fulcrum of the lever (6) and the lifting track (7); the distance between the lifting track (7) and the swinging fulcrum of the lever (6) is continuously changed through the track lifting guide device (8), so that the speed of the driven pushing block (9) can be continuously changed, the output rotation speed is continuously changed, and the purpose of stepless speed change is achieved; the power output unit outputs the rotation output by the speed change unit along with the movement of the lifting rail (7) to the power output shaft (22) with a fixed position.

2. A lever-type rigid high-torque smooth-drive continuously variable transmission according to claim 1, wherein: the parallel chain mechanism (3) consists of two groups of identical chain sprocket systems which are distributed in a mirror symmetry mode and a long pin shaft (304); each group of chain and chain wheel system comprises two chain wheels (302), a chain (301) which bypasses the two chain wheels (302) to form a closed loop and a driving gear (303) which is coaxially driven by one chain wheel (302); in the parallel chain mechanism (3), two chains (301) are positioned in the middle, two driving gears (303) are positioned at two sides, the two chains (301) are parallel, a gap is arranged in the middle, and two end parts of a long pin shaft (304) are respectively used as pin shafts of a corresponding chain link in the two chains (301) to be connected with the two chains (301); the power input shaft (2) is provided with two gears (201) which are coaxially driven by the power input shaft and are respectively meshed with two driving gears (303) in the parallel chain mechanism (3), and the power input shaft (2) drives two chains (301) in the parallel chain mechanism (3) to synchronously rotate through the gears (201).

3. A lever-type rigid high-torque smooth-drive continuously variable transmission according to claim 1, wherein: the main pushing block (5) consists of a main outer periphery (501) and a main core (502), the main core (502) is arranged in a cavity of the main outer periphery (501) through shafts positioned on two sides of the main core, the main core (502) is slidably arranged on the lever (6), the main outer periphery (501) is slidably arranged on the fixed track (4) through sliding devices I (503) on two sides of the main outer periphery, one side of the main outer periphery (501) close to the parallel chain mechanism (3) is hinged with the long pin shaft (304) through a connecting rod (305), and the main pushing block (5) can rotate along with the parallel chain mechanism (3) to do reciprocating linear motion on the fixed track (4).

4. A lever-type rigid high-torque smooth-drive continuously variable transmission according to claim 1 or 3, characterized in that: the fixed rail (4) consists of two mutually parallel guide rails, two ends of the fixed rail are fixedly arranged on a bottom plate (102) arranged at the bottom of the fixed frame (1) through supports positioned at two opposite sides of the bottom of the fixed frame (1), and the fixed rail is parallel to the bottom plate (102) after being arranged.

5. A lever type rigid high torque stationary transmission continuously variable transmission as claimed in claim 4, wherein: the lifting rail (7) consists of two mutually parallel guide rails, the rail lifting guide device (8) consists of two sets of lifting devices arranged on two opposite sides of the fixed frame (1), each set of lifting device comprises two guide rods (801), a screw rod (804) and a cross beam (803), the guide rods (801) and the screw rods (804) are vertically connected with the top plate (101) and the bottom plate (102) which form the fixed frame (1), the guide rods (801) are connected with sliding blocks (802) in a sliding fit manner, the screw rods (804) are connected with moving blocks (805) in a matching threaded manner, two ends of the cross beams (803) are fixedly connected with the sliding blocks (802) on the two guide rods (801) respectively, the middle of each cross beam (803) is fixedly connected with the moving blocks (805) on the screw rods (804), and the cross beams (803) are parallel to the bottom plate (102); the two ends of the lifting rail (7) are respectively and fixedly connected to the two sets of lifting devices, the guide rail of the lifting rail (7) is parallel to the guide rail of the fixed rail (4) after connection, and the lifting rail (7) can be moved in parallel by synchronous rotation of the two screws (804).

6. A lever-type rigid high-torque smooth-drive continuously variable transmission according to claim 1, wherein: the secondary pushing block (9) consists of a secondary peripheral body (901) and a secondary core body (902), the secondary core body (902) is arranged in a cavity of the secondary peripheral body (901) through shafts on two sides of the secondary core body, the secondary core body (902) is arranged on the lever (6) in a sliding mode, and the secondary peripheral body (901) is arranged on the lifting rail (7) in a sliding mode through sliding devices II (903) corresponding to the lifting rail (7) on two sides of the secondary core body.

7. A lever-type rigid high-torque smooth-drive continuously variable transmission according to claim 1, wherein: the lever (6) is a long and straight rod, the top end of the lever is provided with an inverted U-shaped frame (601), two ends of the inverted U-shaped frame (601) are respectively and rotatably arranged in two bearing seats (104) arranged at the upper end of the fixing frame (1), the main pushing block (5) is arranged at the lower end of the lever (6), the auxiliary pushing block (9) is arranged in the middle of the lever (6), the auxiliary pushing block (9) can move along with the lifting rail (7) in the range from the lower end to the upper end of the lever (6), and the inverted U-shaped frame (601) at the top end of the lever (6) can enable the auxiliary pushing block (9) to move along with the lifting rail (7) to the position of a swinging fulcrum of the lever (6).

8. A lever-type rigid high-torque smooth-drive continuously variable transmission according to claim 1, wherein: the rotary integration device (15) comprises a gear I (1501) fixedly arranged at one end of a left central shaft (13), a reversing gear (1502) externally meshed with the gear I (1501), a driving wheel I (1504) fixed with the reversing gear (1502), a driving wheel II (1505) fixedly arranged at one end of a right central shaft (12), a driving belt II (1505) bypassing the driving wheel I (1504) and forming a closed loop, wherein the left central shaft (13) rotates and is output through the gear I (1501), and is driven to the right central shaft (12) through the driving belt II (1503) after the direction of the driving belt II is changed through the reversing gear (1502).

9. A lever-type rigid high-torque smooth-drive continuously variable transmission according to claim 1, wherein: in the power output unit, a driving wheel (16) is fixedly arranged on a right central shaft (12), a driven wheel I (20) is arranged on the lower surface of a top plate (101) forming a fixing frame (1), a driven wheel II (21) is fixedly arranged on a power output shaft (22), the power output shaft (22) is arranged on the upper surface of a bottom plate (102) forming the fixing frame (1) through a bearing seat (104), a lifting rail (7) is arranged on one side surface of the driving wheel (16), guide wheels I (18) and guide wheels II (19) are respectively arranged on the upper side and the lower side of the driving wheel (16), and a driving belt III (17) sequentially bypasses the driven wheel I (20), the guide wheels I (18), the driving wheel (16), the guide wheels II (19) and the driven wheel II (21) to form a closed loop; the part of the driving belt III (17) between the driven wheel I (20) and the guide wheel I (18), the part of the driving belt III (17) between the guide wheel II (19) and the driven wheel II (21) and the moving direction of the lifting track (7) are parallel.

10. A lever-type rigid high-torque smooth-drive continuously variable transmission according to claim 1, wherein: the power input unit, the speed changing unit and the power output unit are at least one group, and a plurality of groups of power input units, speed changing units and power output units can be connected in parallel.