WO2020150846A1 - Motion conversion mechanism - Google Patents

Abstract

A motion conversion mechanism, specifically referred to is mechanical transmission mechanism using a combination of compound racks and gears to convert a reciprocating linear motion and an oscillation into one continuous unidirectional rotation. The motion conversion mechanism comprises: a gear frame (1), a rack (2), front and rear gears (3 and 4), a shaft (5), a gear frame limiting component (601), a machine frame (7), and a rack limiting component (602). The front and rear gears respectively are connected in parallel to the shaft via unidirectional bearings. The two unidirectional bearings have a same rotation-blocking direction. The gear frame is formed by fixedly connecting left and right racks (101 and 102) provided on either side. The left and right racks are staggered from each other on positions in the axial direction of the shaft, and, respectively correspond to the positions of the front and rear gears mounted on the shaft. A non-motion direction of the gear frame is limited within a gear frame positioning component fixed on the machine frame. The rear gear not only is meshed with the right rack of the gear frame but also is meshed with the rack. The front gear is meshed with the left rack of the gear frame. The outer side of the rack is limited by a rack limiting component fixed on the machine frame. The shaft is movably connected to the machine frame.

Description

Motion conversion mechanism Technical field:

The invention relates to a mechanical transmission structure, in particular to a mechanical transmission mechanism that uses a composite rack and gear combination to convert reciprocating linear motion and swing into a continuous unidirectional rotation.

Background technique:

At present, in bicycle technical fields such as bicycles, basically, a chain and sprocket transmission structure is used to ride through the pedaling action of reciprocating circles. The utilization rate of the force exerted by this pedaling action is low; and before the rider gets on the bike, because the position of the pedal is uncertain, it is easy to touch the legs and feet, and the pedal must be moved to the appropriate position before riding the bicycle to start ,kind of hard.

Summary of the invention:

The purpose of the present invention is to overcome the above-mentioned shortcomings in the prior art and provide a motion conversion mechanism.

The invention is realized through the following technical solutions: a motion conversion mechanism, including: gear frame, rack, front and rear gears, shaft, gear frame limit assembly, frame, rack limit assembly, the front and rear gears pass through the single The two one-way bearings are connected in parallel on the shaft. The rotation and check directions of the two one-way bearings are the same. The gear frame is fixedly connected by the left and right racks arranged on both sides. The position of the left and right racks in the axis direction of the shaft Staggered from each other, and respectively correspond to the positions of the front and rear gears installed on the shaft. The non-moving direction of the gear frame is limited to the gear frame positioning assembly fixed on the frame. The rear gear is in line with the right rack of the gear frame. It meshes with the rack; the front gear meshes with the left rack of the gear frame, the outer side of the rack is limited by the rack positioning assembly fixed on the frame, and the shaft is movably connected to the frame.

In the present invention, because the front and rear gears connected to the shaft through a one-way bearing mesh with the left and right racks on the gear frame, and one of the gears meshes with the rack, the gear frame and the rack are realized The up and down reciprocating movement of the shaft is converted into a continuous one-way rotation of the shaft, and it realizes the synchronization of the gear frame and the rack, but can move in different directions. The structure is compact and ingenious, and the transmission efficiency is high. It is especially suitable for bicycles and cranks. Alternative use of connecting rod transmission.

Description of the drawings:

Figure 1 is a schematic diagram of the structure of the present invention;

Figure 2 is a schematic structural diagram of Embodiment 2 of the present invention;

Figure 3 is the H-H cross-sectional view of Figure 2;

Figure 4 is a schematic structural diagram of Embodiment 3 of the present invention;

Figure 5 is a schematic structural diagram of Embodiment 4 of the present invention;

Figure 6 is a schematic structural diagram of Embodiment 5 of the present invention;

Figure 7 is a schematic structural diagram of Embodiment 6 of the present invention;

Figure 8 is a schematic structural diagram of Embodiment 7 of the present invention;

Figure 9 is a schematic structural diagram of Embodiment 8 of the present invention;

FIG. 10 is a schematic structural diagram of Embodiment 9 of the present invention;

Figure 11 is a schematic structural diagram of Embodiment 10 of the present invention;

Fig. 12 is a schematic structural diagram of Embodiment 11 of the present invention.

detailed description:

See attached figure 1, the motion conversion mechanism includes: gear frame 1, rack 2, front and rear gears 3, 4, shaft 5, gear frame limit assembly 601, frame 7, rack limit assembly 602, front, The rear gears 3 and 4 are respectively connected to the shaft 5 in parallel by one-way bearings. The rotation and stop directions of the two one-way bearings are the same. The gear frame 1 is fixedly connected by left and right racks 101 and 102 arranged on both sides. The positions of the left and right racks 101 and 102 in the axial direction of the shaft 5 are staggered, and correspond to the positions of the front and rear gears 3 and 4 mounted on the shaft 5 respectively. The gear frame 1 is laterally limited and fixed on the machine In the gear frame positioning assembly 6 on the frame 7, the rear gear 4 meshes with the right rack 102 of the gear frame 1 and the rack 2; the front gear 3 meshes with the left rack 101 of the gear frame 1, and the rack The outer side of 2 is restricted by the rack positioning assembly 602 fixed on the frame 7, and the shaft 5 is movably connected to the frame 7.

When the present invention is applied, the gear frame 1 moves upward, the left rack 101 drives the front gear 3, and the one-way bearing between the front gear 3 and the shaft 5 makes the shaft 5 and the front gear 3 become one body and clockwise around the center line of the shaft 5 At the same time, the right rack 102 also moves upward, the right rack 102 drives the rear gear 4 meshing with it. The one-way bearing between the rear gear 4 and the shaft 5 makes the rear gear 4 move relative to the shaft 5, and the rear gear 4 Rotate counterclockwise around axis 5;

When the gear frame 1 moves downward, the left rack 101 drives the front gear 3, and the one-way bearing between the front gear 3 and the shaft 5 makes the front gear 3 rotate counterclockwise around the shaft 5, and at the same time, the right rack 102 also moves downwards In motion, the right rack 102 drives the rear gear 4 meshed with it. The one-way bearing between the rear gear 4 and the shaft 5 makes the shaft 5 and the rear gear 4 rotate clockwise around the center line of the shaft 5 together.

As mentioned above, whether the gear frame 1 moves upward or downward, the shaft 5 is driven to rotate in one direction (clockwise rotation in this example), that is, only one gear frame and two one-way bearings are used. The gear can convert a reciprocating linear motion of the gear frame 1 into a one-way rotation of the shaft.

When the gear frame 1 moves upward, the right rack 102 moves upward, and the right rack 102 drives the rear gear 4 meshed with it. The one-way bearing between the rear gear 4 and the shaft 5 makes the rear gear 4 rotate counterclockwise around the shaft 5. The rear gear 4 drives the rack 2 meshed with it to move downward. When the gear frame 1 moves downward, the right rack 102 drives the rear gear 4, and the rear gear 4 drives the rack 2 meshed with it to move upwards.

When the rack 2 moves upward, the rack 2 drives the rear gear 4 meshing with it. The one-way bearing between the rear gear 4 and the shaft 5 makes the shaft 5 and the rear gear 4 rotate clockwise around the center line of the shaft 5 together. At the same time, the rear gear 4 also drives the right rack 102 engaged with it to move downward, and the gear frame 1 moves downward.

In summary, if one of the tooth frame 1 and the rack 2 moves upward, the other must automatically move downward, and vice versa, that is, the movement of the tooth frame 1 and the rack 2 are fixedly synchronized, but not necessarily in the same direction. (Or reverse) relationship. In this example, it is one up and down, and the upward movement of both drives the shaft 5 to rotate in one direction (clockwise rotation in this example), and vice versa, the tooth frame 1 and the tooth The two alternating upward movement of strip 2 once constitutes a cycle, and the alternating upward movement is repeated to convert and superimpose these reciprocating linear motion powers to make the shaft 5 continuously rotate in a single direction.

Changing the backstop direction of the one-way bearing between the front and rear gears 3, 4 and the shaft 5 can change the direction of rotation of the shaft 5.

See Figures 2 and 3, the second embodiment of the present invention is a superimposed drive for driving the branch unit and its multiple composite rack and pinion motion conversion mechanism. A plurality of multiple composite rack and pinion motion conversion mechanisms 8 are installed on one output shaft 5. Each multiple composite rack and pinion motion conversion mechanism 8 is independently driven, so they can be driven asynchronously, and each multiple composite rack and pinion motion The conversion mechanism 8 can have multiple tooth frames 1 and gears. Each pair of tooth frames and gears is a branch unit 9 for power input. Here, part of the composite rack and pinion motion conversion mechanism described in Figure 1 becomes The branch unit 9, in a branch unit 9, one of the tooth frames 1 can be a single-sided rack and pinion structure, which plays the same role as the rack 2 in the first embodiment; in the same multi-compound rack and pinion movement The movement of each power input unit 9 in the conversion mechanism is synchronized, but each movement direction can be different, that is, multiple tooth frames 1 can be set at different angles around the shaft 5; these are the same as the multiple tooth frames 1 of the output shaft 5. , The power input branch unit 9 composed of gears in pairs, and the independent multi-composite rack and pinion motion conversion mechanism 8 convert and superimpose the respective motion power on the same output shaft 5, and output in the form of rotational power.

See Figure 4, the third embodiment of the present invention. In this embodiment, a long barrel gear (or long barrel multi-connected gear) is used to replace the gears 3 and 4 in the first embodiment, and multiple (at least one) teeth The rod can be meshed with the same long barrel gear (or long barrel multi-connected gear) at any position in the axial direction and in any direction of the circumference. The transmission principle is the same as that of the first embodiment, including: two tooth frames 18, 26, two Gear 19, 25, long barrel gear (or long barrel multiple gear) 20, rack 21, stop 22, output shaft 23, frame 24, each of the two tooth frames 18, 26 consists of two racks 181 , 182 and 261, 262 are fixedly connected at both ends into a frame shape. The two racks of each tooth frame are staggered in the axial direction of the gear, and each is connected to the two ends of the long barrel gear 20 and the two ends of the long barrel gear 20 respectively. Two adjacent gears 19, 25 mesh, the racks 182, 262 of the two tooth frames mesh on the same side of the long barrel gear 20 (also can mesh on different sides), and the gears 19, 25 and the long barrel gear 20 respectively Use one-way bearings to connect with the same output shaft 23, and their one-way bearings have the same rotation and stop direction. The stopper 22 limits the gear frame and rack, and the output shaft 23 can rotate in the hole of the frame 24, as long as Avoid the interference of the racks during the movement. At any position in the axial direction of the same long barrel gear 20, in any direction of the gear circumference, multiple (at least one) racks 21 and long barrel gears can be arranged 20 meshing, these racks, gear frames, and gears that are meshingly connected with the long barrel gears are synchronized and linked, but the direction of movement can be different, for example, the direction is opposite.

Multiple long barrel gears are connected by multiple gear frames, and multiple long barrel gears are each provided with multiple racks to mesh with them. The one-way bearing connected to the output shaft of each long barrel gear rotates in the same direction to form a rack. The combination of motion conversion mechanism drives the same output shaft to rotate in one direction. The multiple racks and multiple racks in the same rack motion conversion mechanism combination are synchronized and linked. The combination of multiple rack motion conversion mechanisms is Under the condition that the one-way bearing rotates in the same direction, the same output shaft is driven to rotate in one direction.

Long barrel gears can also be made as long barrel multi-connected gears. Multiple gears are keyed or welded on the long barrel. Both ends of the long barrel gear are equipped with tooth frames and gears to improve the carrying capacity and increase the rigidity of the mechanism.

The shaft 23 can be made hollow, and the long barrel gear (or long barrel multi-connected gear) 20 can increase the aperture to reduce weight.

See Figure 5, the fourth embodiment of the present invention is used for bicycles. In this embodiment, a rack (or sector rack) and two arc racks are fixedly connected to form a rack , Instead of the rack 2 and the tooth frame 1 in the first embodiment, the transmission principle is the same as that of the first embodiment. The swing rods 103, 202 and the central shaft 10 can be rotated in the holes provided on the frame 7. 103 and 202 are respectively hinged on the central shaft 10, the two ends of the swing rod 103 are respectively connected with the right pedal 11 and the tooth frame, the two ends of the swing rod 202 are respectively connected with the left pedal 12 and the rack, two left and right The pedals 11 and 12 are alternately stepped on to drive the two swing rods 103 and 202 to reciprocate up and down, so that the rear axle 13 arranged on the frame 7 continuously outputs unidirectional rotation power to drive the bicycle. The rear axle 13 can be The solid shaft can also be a bushing fitted on the solid shaft (consistent with the current chain drive bicycle form).

See Fig. 6, the fifth embodiment of the present invention is used for bicycles. In this embodiment, one arc-shaped rack, two arc-shaped racks hinged on the same swing rod and two limit rollers are used The rack hinge type gear frame is constructed instead of the rack 2 in the first embodiment, the rack fixed connection type gear frame 1, and the transmission principle is the same as that of the first embodiment, and each end of the shafts 62 and 63 is inserted into the tooth frame. In the holes at the lower end of the two arc-shaped racks 66, 67, the two arc-shaped racks 66, 67 mesh with the front and rear gears on the left and right sides, and can swing around the shafts 62, 63, respectively. , The other ends of the shafts 62 and 63 are fixed on the same right swing rod 69, the center distance of the two shafts corresponds to the diameter of the gear; one end of the shaft 64 is inserted into the hole at the lower end of the arc-shaped rack 65, The arc-shaped rack 65 meshes with the rear gear on the left side and can swing around the shaft 64. The other end of the shaft 64 is fixed at the end of the left swing rod 68; the two swing rods rotate around the center line of the central shaft 10, The bottom bracket 10 can be rotated in a hole provided on the frame 7. The three limit roller (bearing) assemblies 61 fixed on the frame 7 are respectively set near the outer gears of the three arc racks, so that the three racks are connected to each other. The meshed gears do not disengage and mesh normally; the arc radii of the three arc racks 65, 66, 67 and the positions of the three shafts 62, 63, 64 fixed on the pendulum rod, and the distance from the center of the gear to the center of rotation of the pendulum rod Corresponding to the diameter of the meshing gear, the two swing rods swing to drive the rack and pinion to rotate, and the drive shaft 13 rotates in one direction.

See Figure 7, the sixth embodiment of the present invention is used for bicycles. In this embodiment, an arc-shaped rack and two arc-shaped racks are fixedly connected to form an arc-shaped tooth frame instead of the implementation. The transmission principle of the rack 2 and the tooth frame 1 in the first example is the same as that of the first embodiment. One end of the shaft 16 is inserted into the hole at the lower end of the arc-shaped tooth frame 70. The arc-shaped tooth frame can swing around the shaft 16, and the shaft The other end of 16 is fixed to the end of the right swing rod 73; one end of the other shaft 17 is inserted into the hole provided at the lower end of the arc-shaped rack 71. The arc-shaped rack 71 can swing around the shaft 17, and the other shaft 17 One end is fixed to the end of the left swing rod 72; the two swing rods rotate around the center line of the central shaft 10, the central shaft 10 can rotate in the hole provided on the frame 7, and is fixed to the limit roller ( The bearing) assembly 15 is arranged near the outer gears of the arc-shaped rack 71 and the arc-shaped tooth frame 70, so that the arc-shaped rack 71 and the two arc-shaped racks constituting the tooth frame 70 are not disengaged from each of the gears that mesh with them and are normal Meshing; the arc radii of the three arc racks and the positions where the two shafts 16, 17 are fixed on the pendulum rod, match the distance from the center of the gear to the rotation center of the pendulum rod and the diameter of the meshing gear. Two pendulum rods Swing drives the arc-shaped rack, the arc-shaped tooth frame to move, and the gear rotates, and the drive shaft 13 rotates in one direction.

The fifth and sixth embodiments of the present invention are used in the motion conversion mechanism of a bicycle. The two swing rods and the gear frame and rack respectively connected to the two swing rods can also be arranged on the upper part of the frame 7.

See Figure 8, the seventh embodiment of the present invention is used for bicycles. In this embodiment, a chain (or timing belt) 77 fixed on the left swing rod 86 at both ends and tensioned by a tension wheel is used. Both ends are fixed on the right swing rod 87 and a flexible chain frame (or timing belt frame) formed by two chains (or timing belts) 82 and 83 tensioned by a tension wheel replaces the rack 2 in the first embodiment , Gear frame 1, use front and rear sprockets to replace the front and rear gears in the first embodiment, including: left swing rod 86, right swing rod 87, three chains (synchronous belt) 77, 82, 83, front sprocket ( Belt wheel) 89, rear sprocket (belt wheel) 88, elastic tensioner 80, output shaft 13, frame 7, middle shaft 10, six pin shafts 76, 78, 79, 81, 84, 85, front sprocket The (belt wheel) 89 and the rear sprocket (belt wheel) 88 are each connected to the output shaft 13 with a one-way bearing. The rotation of the two one-way bearings is the same. The chain 77 is wrapped around the left side of the rear sprocket 88. The two ends of the chain 77 are respectively fixed on the left swing rod 86 with pins 76 and 81. Two elastic tensioning wheels 80 fixed on the frame 7 and arranged near the sprocket press the chain 77 so that the chain 77 is in motion. The two chains 82 and 83 are fixed on the right swing rod 87 with two pins 79, 84 and 78, 85 respectively at both ends of the two chains 82 and 83, respectively. A chain 83 is wrapped around the right side of the rear sprocket 88 (the rear sprocket 88 can also be made into a double or multiple sprocket, so that the chain 83 is wrapped around one of the double or multiple sprocket The chain 77 is wrapped around the left side of the other sprocket of the double or multiple sprocket), and the other chain 82 is wrapped around the left side of the front sprocket 89 and fixed on the frame 7. The elastic tensioning wheel 80 assembly makes the two chains keep tightly wrapped around the front and rear sprockets that are engaged with each other during the movement. The swing of the two pendulum rods around the central axis 10 drives the chain to move. The sprocket rotates, and the drive output shaft 13 rotates unidirectionally in the hole provided on the frame 7, so that the bicycle moves.

See Fig. 9, as in the second embodiment, each tooth frame 1 is connected to the piston 104 in each cylinder by a piston pin 105, instead of the crankshaft connecting rod mechanism of the existing engine, and the crankshaft is replaced by an optical shaft.

See Figure 10, the ninth embodiment of the present invention is used in an engine. In this embodiment, part of the rack in the third embodiment is replaced by a connecting rod sleeved on the shaft, which becomes a composite rack and pinion connecting rod movement conversion Mechanism, including: piston pin 40, piston 41, connecting rod 42, 51, gear frame 43, 50, rack 44, 49, connecting rod 45, 48, shaft 46, 47, gear 52, 58, long tube multiple gear 54. Frame 56, engine output shaft 57, four gears 541, 542, 543, 544 are fixed on the long-tube multi-connected gear 54. Both ends of the long-tube multi-connected gear 54 are provided with tooth frames 43, 50, two Each rack of the two tooth frames 43, 50 meshes with the two gears 541, 544 provided at both ends of the long-tube multi-connected gear 54 respectively. The other rack of each of the two tooth frames respectively engages with the The two gears 52 and 58 adjacent to the two ends of the long-tube multi-link gear mesh. The long-tube multi-link gear 54 and the two gears 52, 58 are respectively connected with the output shaft 57 by one-way bearings. The rotation of these one-way bearings is reversed. The stopping directions are the same, the output shaft 57 can be rotated in the hole of the frame 56. One end of the connecting rods 42, 51 is fixedly connected with the tooth frames 43, 50, and the other end is connected with the piston 41 by a piston pin 40, and is connected with two teeth. The racks 44, 49 adjacent to the frames respectively have teeth at one end that mesh with the gears 542, 543 on the long barrel multi-connected gear 54 on different sides, and the other end is connected with the piston by a piston pin. The toothed frames 43, 50, and rack 44 There are holes on the two shafts 46 and 47. The two ends of the two shafts 46 and 47 are respectively inserted into the two sets of holes in the tooth frame 43, the rack 49, the tooth frame 50, and the rack 44 that mesh with the long barrel gear 54 on the same side. , The two shafts 46, 47 are parallel to the axis of the long barrel multi-connected gear 54, two sets of (multiple) connecting rods 45, 48, each end hole is set on the two shafts 46, 47, and the other One end is connected with the piston by a piston pin, and the two sets of connecting rods (pistons) connected to the shafts 46 and 47 move in opposite directions (one up and down). Any connecting rod, rack, or gear frame will be driven by the piston. The meshed multiple gears 54 and gears 52 and 58 rotate, and the output shaft 57 is driven to rotate in the hole of the frame 56 under the action of the one-way bearing.

The structure of the H direction view in Figure 10, the center lines of each cylinder are all on the same plane, the connecting rod drives the output shaft with the component force of the piston thrust, the structure of the H" view, the center lines of the two cylinders are in two On the plane, the full force of the thrust of the cylinder piston drives the output shaft.

See Fig. 11, the tenth embodiment of the present invention is used in an engine. The rack is arcuate. Both ends of the rack and the rack are provided with cylinders. The cylinders at each end alternately drive the rack and the rack to reciprocate, including: pistons Pin 28, piston 29, gear frame 30, rack 31, engine output shaft 32, frame 33, gear 34, long barrel gear (or long barrel multiple gear) 35, connecting rod 36, two of each rack 31 Both ends are connected with the piston 29 in the cylinder by a piston pin 28. Both ends of the gear frame 30 are fixedly connected with a connecting rod 36. The two connecting rods 36 are respectively connected with two pistons 29 by a piston pin 28. The barrel gear 35 is respectively connected with the engine output shaft 32 by one-way bearings. The rotation and stopping directions of the one-way bearings are the same. The two racks of the gear frame respectively mesh with one end of the long barrel gear and the adjacent gear, and the engine output shaft 32 can rotate in the hole of the frame 33, and the cylinder pistons at both ends of the same rack alternately push the rack to reciprocate, so that the gears rotate forward and backward to drive the engine output shaft 32 to continuously rotate in one direction.

In the figure, the letters E, D, F, C, A, and B plus guide lines indicate the same parts in the two projections.

According to the actual situation, the gear can be made into partial teeth.

See Fig. 12, the eleventh embodiment of the present invention is used in an engine. The difference from the tenth embodiment is that the rack is straight, and the two ends of the rack and the rack are also provided with cylinders. The cylinders at both ends alternately drive the rack. Reciprocating to drive the output shaft of the engine to rotate in one direction,

Make two or more reciprocating linear motions and swings have a fixed motion relationship with each other, such as synchronized motion, different or opposite directions, etc., and convert these motion power into continuous unidirectional rotation power output, or convert or superimpose At the same time, the mechanical transmission device with continuous one-way rotation power output is used in various mechanical equipment, such as engines, working machinery, transportation tools, power generation facilities, sports fitness equipment, toys, etc., especially in bicycles. , Such as bicycles, scooters, pedal boats and engines.

Claims (9)

The motion conversion mechanism includes: gear frame, rack, front and rear gears, shafts, gear frame limit assembly, frame, rack limit assembly, characterized in that: the front and rear gears are connected in parallel through one-way bearings. On the shaft, the rotation and check directions of the two one-way bearings are the same. The tooth frame is fixedly connected by the left and right racks arranged on both sides. The positions of the left and right racks in the axial direction of the shaft are staggered and respectively. Corresponding to the positions of the front and rear gears installed on the shaft, the non-moving direction of the gear frame is limited to the gear frame limit assembly fixed on the frame. The rear gear meshes with the right rack of the gear frame and The rack meshes; the front gear meshes with the left rack of the gear frame, the outer side of the rack is limited by the rack positioning assembly fixed on the frame, and the shaft is movably connected to the frame. The motion conversion mechanism according to claim 1, wherein a plurality of multiple composite rack and pinion motion conversion mechanisms are mounted on the shaft, and each multiple composite rack and pinion motion conversion mechanism is independently driven, so they can be mutually Asynchronous drive. Each multi-composite rack and pinion motion conversion mechanism can have multiple gear frames and gears. Each pair of gear frames and gears is a branch unit for power input. In a branch unit, one of the gear frames can be It is a single-sided rack and pinion structure; each power input unit in the same multi-composite rack and pinion motion conversion mechanism operates synchronously, but their respective motion directions can be different, that is, one of the power input units acts, the other inputs The unit must act together, and multiple gear frames can be set at different angles around the shaft; these multiple gear frames and gears of the same output shaft are paired with power input branch units, and independent multiple composite rack and pinion transmissions. , The respective motion power is converted, collected and superimposed on the same output shaft, and output in the form of rotational power. The motion conversion mechanism according to claims 1 and 2, wherein the rack is a straight or curved rack. The motion conversion mechanism according to claim 1, 2, 3, characterized in that: the gear is a long barrel gear (or a long barrel multi-link gear), and multiple (at least one) racks are in the same long barrel The gear (or long barrel multi-unit gear) meshes with it at any position in the axial direction and any direction of the circumference, including: two gear frames, two gears, long barrel gear (or long barrel multi-unit gear), rack, and limit Parts, output shaft, frame, two tooth frames are fixedly connected by two racks at both ends into a frame shape, the two racks of each tooth frame are staggered in the axial direction of the gear, two on one tooth frame Rack, one meshes at one end of the long barrel gear, the other meshes with a gear adjacent to this end of the long barrel gear, and the two racks of the other gear frame are respectively connected to the other end of the long barrel gear and opposite to the other end. The adjacent gear meshes, each of the racks of the two tooth frames meshes on the same side of the long barrel gear (also can mesh on different sides), the two gears and the long barrel gear respectively use one-way bearings with the same output Shaft connection, their one-way bearing rotation and check direction are the same, as long as they avoid the interference of the racks during the movement, at any position in the axial direction of the same long barrel gear (or long barrel multi-connected gear), In any direction of the gear circumference, multiple (at least one) racks can be set to mesh with the long barrel gear. These racks and gear frames are synchronized and linked, and the direction of movement can be different (for example, opposite). The limiter makes the gear frame , The rack is limited, the output shaft can be rotated in the hole on the frame; Multiple long barrel gears are connected by multiple tooth frames, each of the multiple long barrel gears is provided with multiple (at least one) racks to mesh with it, and the one-way bearing connected to the output shaft of each long barrel gear rotates in the reverse direction. Same, constitutes a rack motion conversion mechanism combination, which drives the same output shaft to rotate in one direction. The two tooth frames connected to the two ends of the same long barrel gear can be on the same side of the long barrel gear. The meshing can also be meshed on the opposite side. Multiple racks and multiple racks in the same rack motion conversion mechanism combination are synchronously linked; multiple rack motion conversion mechanisms are combined, and the reverse rotation of the one-way bearing is the same Under the condition of driving the same output shaft to rotate in one direction, each mechanism combination can be asynchronous with each other. The motion conversion mechanism according to claim 1 to 4, characterized in that: the rack and rack are arc-shaped racks, two arc-shaped racks hinged on the same swing rod (restricted by rollers) The two shafts are inserted into the lower end of the two arc-shaped racks that constitute the tooth frame. The two arc-shaped racks are located on the front and rear gears. The left and right sides are engaged with them, and they can swing around two shafts respectively. The other ends of the two shafts are fixed on the same swing rod. The center distance of the two shafts corresponds to the diameter of the gear. One end is inserted into the hole at the lower end of the third arc-shaped rack. The third arc-shaped rack meshes with the rear gear on the left side and can swing around the third shaft. The other end of this shaft is fixed to the other The end of a pendulum rod; two pendulum rods rotate around the center line of the pendulum rod shaft (center axis), the pendulum rod shaft can be rotated in the hole set on the frame, and three limit rollers fixed on the frame The (bearing) components are respectively arranged near the outer gears of the three arc-shaped racks, so that the gears meshed with the three racks are not disengaged and meshed normally. The motion conversion mechanism according to claims 1 to 4, characterized in that: the rack and rack are arc-shaped racks, two arc-shaped racks are fixedly connected to the rack, and a shaft One end is inserted into the hole at the lower end of the arc-shaped tooth frame, the arc-shaped tooth frame can swing around this shaft, the other end of this shaft is fixed to the end of a swing rod; one end of the other shaft is inserted into a curved tooth In the hole at the lower end of the bar, the arc-shaped rack can swing around this axis, and the other end of this axis is fixed to the end of another swing rod; the two swing rods are around the center of the swing rod axis (center axis) When the wire rotates, the pendulum shaft can rotate in the hole set on the frame, and the limit roller (bearing) assembly fixed on the frame is set near the outer gear of the curved rack and the curved tooth frame to make the curved tooth The rod and the two arc-shaped root racks constituting the tooth frame are not disengaged from the gears engaged with each of them and are normally engaged. The motion conversion mechanism according to claim 1, 2, 4, characterized in that: the rack is fixed with a chain (or timing belt) whose two ends are fixed on the same pendulum rod and tensioned by a tension wheel. ) Instead, the tooth frame is replaced by a chain frame (or timing belt frame) formed by two chains (or timing belts) whose ends are fixed on the other pendulum rod and are respectively tensioned with tension wheels , The front and rear gears are replaced by front and rear sprockets, including: left swing lever, right swing lever, three chains (synchronous belt), front chain wheel (belt wheel), rear chain wheel (belt wheel), Elastic tensioner, output shaft, frame, middle shaft, six pin shafts, front sprocket (belt pulley) and rear sprocket (belt pulley) are connected to the output shaft with one-way bearings, and the two one-way bearings The rotation check direction is the same. A chain is wrapped around the left side of the rear sprocket. The two ends of the chain are fixed to the left swing lever with two pins respectively. The two ends are fixed on the frame and set near the sprocket. The elastic tensioning wheel presses the chain so that the chain is tightened during movement and wrapped around the meshing rear sprocket without disengaging; the two ends of the other two chains are fixed to the right swing lever with two pins respectively. , One of the chains is wrapped around the right side of the rear sprocket, and the other chain is wrapped around the left side of the front sprocket (the rear sprocket can also be made into a double or multiple sprocket to make a chain Wrap on the right side of one sprocket of the double or multiple sprocket, make the other chain wrap around the left side of the other sprocket of the double or multiple sprocket, and fix it on the frame The elastic tensioning wheel assembly makes the two chains keep tightly wrapped around the front and rear sprockets that are engaged with each other during the movement. The sprocket (belt wheel) can be multi-linked sprocket (belt wheel) ), multiple chains (timing belts) are wrapped around the sprocket (pulley) to mesh with it. The motion conversion mechanism according to claim 1, 2, 4, characterized in that: a part of the rack is replaced by a connecting rod, including: two connecting rods, two tooth frames, two racks, two groups ( Multiple) connecting rod, two shafts, two gears, long barrel multi-link gear, frame, output shaft, four gears are fixed on the long barrel multi-link gear, and both ends of the long barrel multi-link gear are equipped with teeth. Frame, each rack of the two tooth frames meshes with the two gears set at both ends of the long barrel multi-connected gears respectively, and the other racks of the two tooth frames are respectively connected with the long barrel multi-connected gears. Two adjacent gears at the two ends of the gear mesh. One end of each of the two connecting rods is fixedly connected to one of the two tooth frames, and the other end is connected to the drive unit. Two teeth adjacent to the two tooth frames are respectively connected. The toothed end of the strip is engaged with the two gears on the long barrel multi-connected gear on different sides, and the other end is connected with the drive unit. The two tooth frames and the two racks have holes, and the two shafts have two The two ends are respectively inserted into the holes of a tooth frame and a rack that mesh with the same side of the long barrel gear. Both shafts are parallel to the axis of the long barrel multi-connected gear. There are two sets of multiple connecting rods. The holes at one end of each are respectively sleeved on the two shafts in groups, and the other end is connected with the driving unit, and the movement directions of the two sets of connecting rods connected with the two shafts are opposite. The motion conversion mechanism according to claims 1 to 6, wherein a driving unit is provided at both ends of the rack and the tooth frame, and the driving units at both ends alternately drive the rack and the tooth frame to reciprocate.

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