Please select the most similar patent number from A, B, C and D. Which number is?
Disclosed is a circular reciprocation conversion mechanism for a bicycle. The circular reciprocation conversion mechanism comprises two discs (1, 2) with opposite centers, and a transmission shaft (3) arranged between the two discs (1, 2) and parallel to the direction of a disc surface. The two discs (1, 2) are rotatably arranged on a connecting rod (5); a rotary handle (10, 20) is provided on each of the discs (1, 2); and raised teeth (6) are circumferentially distributed on an inner side surface of each of the discs (1, 2). The transmission shaft (3) is arranged in the direction of the diameter of the circular discs (1, 2) and is sleeved with a first gear (41) and a second gear (42). The first and the second gear (41, 42) are respectively connected to the transmission shaft (3) via two one-way transmission structures with opposite transmission directions, and the first and the second gear (41, 42) respectively engage, at front and back ends of the discs (1, 2), with the raised teeth (6) on the inner sides of the discs. A drive force is generated by converting the up-and-down reciprocating motion of pedals (11, 12) into the circumferential motion of the transmission shaft (3) so as to drive a bicycle to move forward. Conventional circumferential motion is replaced by reciprocating motion, such that unnecessary work can be reduced, thereby saving on the physical strength of a user.
A: A method and device for converting rotary motion to reciprocating percussion motion. The device comprises a machine body (4), a travel portion (7), and a reciprocating percussion portion (5). The reciprocating percussion portion (5) comprises a percussion drive mechanism (2), a rocker arm (6), and a percussion head (1). The percussion drive mechanism (2) comprises a percussion power source member (11), a transmission component, and a crankshaft (10). The percussion power source member (11) comprises a motor, and the motor comprises a power output shaft (14). The transmission component comprises a power gear (13) and a transmission gear (12). The power gear (13) is mounted on the power output shaft (14). The transmission gear (12) drives the crankshaft (10). The transmission component comprises a transmission shaft. The power output shaft (14) is perpendicular to the rocker arm (6), and is parallel to the transmission shaft and the crankshaft (10) so that the transmission gear (12) drives the crankshaft (10) to convert rotary motion to reciprocating motion; or the power output shaft (14) is parallel to the rocker arm (6), the crankshaft (10) is driven to convert rotary motion to reciprocating motion after the power direction is changed by a power bevel gear and a transmission bevel gear. The crankshaft (10) drives the percussion head (1) to perform reciprocating percussion. The travel portion (7) drives the machine body to travel. The machine body (4) drives the reciprocating percussion portion (5) to move and work continuously. The device applies to the mining field or mechanical engineering field, and has advantages such as strong structural strength and a small amount of maintenance.
B: A spur-type vehicle tire energy recovery assembly comprises a hub (1), a tire (2), an output shaft (3), a transmission mechanism (5), and multiple energy acquisition devices (4). The output shaft (3) is rotatably connected to the hub (1), and the two are coaxially disposed. The energy acquisition devices (4) comprise a first gear (41) rotatably connected to the hub (1), and a rack (42) capable of sliding in a radial direction of the hub (1). The first gear (41) meshes with the rack (42), and one end of the rack (42) abuts an inner wall of the tire (2). The transmission mechanism (5) comprises a planetary gear set and a second gear (51). The planetary gear set comprises an outer teeth ring (52), a planetary gear (53), a planetary carrier (54), and a sun gear (55). The sun gear (55) is connected to the output shaft (3). The planetary carrier (54) is fixedly connected to the hub (1). Gear teeth (521) are disposed at the outer circumference of the outer teeth ring (52). The gear teeth (521) mesh with the second gear (51). The second gear (51) is fixedly connected to the first gear (41), and the two are coaxially disposed. The first gear (41) and the rack (42) of the energy acquisition devices (4) mesh to convert linear motion of compression and deformation of the tire (2) into rotational motion of the first gear (41), and then power of the multiple energy acquisition devices (4) is transmitted to the output shaft (3) via the transmission mechanism (5), thereby completing energy recovery from deformation of a tire (2).
C: Disclosed is a transmission device which comprises a cylinder (1), a piston (2), a rack (3), a first gear (5), a second gear (6), a first linkage gear (9), a first shaft (7), a second linkage gear (10) and a second shaft (8), wherein one end of the rack is fixedly connected to the piston; the piston is arranged inside the cylinder, and the other end of the rack is arranged outside the cylinder; one end of the first shaft is locked with the first gear, and the other end thereof is locked with the first linkage gear; one end of the second shaft is locked with the second gear, and the other end thereof is locked with the second linkage gear; the first linkage gear is meshed with the second linkage gear; the piston runs from an upper dead point to a lower dead point, and the rack only drives the first gear to rotate; and the piston runs from the lower dead point to the upper dead point, and the second gear drives the rack to move. The transmission device not only can realize that the reciprocating motion of the piston is converted into circumferential motion, but also can ensure no transmission dead angle in the whole conversion process, with small energy loss.
D: A transportation means (1, 2) using a device (11, 21) for converting reciprocating rectilinear motion into single-direction circular motion. The transportation means (1, 2) comprises a power output mechanism (12) and two rotating shafts (13) that are oppositely disposed. A circular motion output mechanism (114) of the device (11, 21) for converting reciprocating rectilinear motion into single-direction circular motion is transmittingly connected to the power output mechanism (12). Each reciprocating rectilinear motion mechanism (112, 212) comprises an elongated pedal (1121, 2121). A bendable portion (11211) is disposed at the end of the elongated pedal (1121, 2121) distant from the device (11, 21) for converting a reciprocating rectilinear motion into a single-direction circular motion. The bendable portion (11211) is in rotational connection with the rotating shaft (13) by means of a torsional spring (131), so that when the bendable portion (11211) rotates around the corresponding rotating shaft (13), the end of the elongated pedal (1121, 2121) proximate to the device (11, 21) for converting reciprocating rectilinear motion into single-direction circular motion performs small-curvature near-rectilinear motion. The transportation means (1, 2) enables a rider to ride more comfortably with less effort.
Answer: D