Reciprocating drive mechanism and bicycle

Abstract

The present invention provides a reciprocating drive mechanism and a bicycle, the reciprocating drive mechanism comprises a rotating wheel, a first driving member driving the rotating wheel to rotate in a first direction, a second driving member driving the rotating wheel to rotate in the first direction, and a transmission assembly connecting the first driving member and the second driving member and making the first driving member and the second driving member rotate in opposite directions, the first driving member and the second driving member are respectively arranged on the left and right sides of the rotating wheel, the first driving member and the second driving member are both connected to the rotating wheel for unidirectional rotation, the transmission assembly comprises a first connecting member fixed to the first driving member, a second connecting member fixed to the second driving member, and a transmission rod for transmitting the movement between the first connecting member and the second connecting member. The reciprocating drive mechanism and the bicycle provided by the present invention do not need to use a chain sprocket mechanism, and the chain will not fall off or rust, and the reciprocating drive mechanism occupies a small volume and has a relatively simple structure.

Description

Technical Field

[0001] The invention belongs to the technical field of bicycles, and more specifically, relates to a reciprocating drive mechanism and a bicycle. Background Art

[0002] Bicycles are very common in daily life as a means of transportation and exercise. The commonly used driving mechanism of bicycles is the sprocket mechanism, which drives the front wheel through the connection of the sprocket and the chain. When bicycles use the transmission method of chain and sprocket, the chain is easy to fall off and rust, and the sprocket mechanism has a complex structure and occupies a large space. Summary of the invention

[0003] The object of the present invention is to provide a reciprocating drive mechanism to solve the technical problems existing in the prior art such as the sprocket mechanism having a complex structure, being prone to failure, and occupying a large space.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a reciprocating drive mechanism, including a rotating wheel, a first driving member driving the rotating wheel to rotate in a first direction, a second driving member driving the rotating wheel to rotate in the first direction, and a transmission assembly connecting the first driving member and the second driving member and making the first driving member and the second driving member rotate in opposite directions, the first driving member and the second driving member are respectively arranged on the left and right sides of the rotating wheel, the first driving member and the second driving member are both connected to the rotating wheel for unidirectional rotation, and the transmission assembly includes a first connecting member fixed to the first driving member, a second connecting member fixed to the second driving member, and a transmission rod for transmitting movement between the first connecting member and the second connecting member.

[0005] In one embodiment, the transmission assembly also includes a main shaft, which passes through the rotating wheel, and the axial direction of the main shaft coincides with the central axis of the rotating wheel; the transmission rod is slidably connected to the main shaft, and the sliding direction of the transmission rod is parallel to the axial direction of the main shaft, or the transmission rod is swingably connected to the main shaft, and the rotation center axis of the transmission rod is perpendicular to the axial direction of the main shaft.

[0006] In one embodiment, one end of the first connecting member is disposed in the main shaft, and the other end of the first connecting member is connected to the first driving member; one end of the second connecting member is disposed in the main shaft, and the other end of the second connecting member is connected to the second driving member.

[0007] In one embodiment, the first connecting member includes a first fixed portion, a first extending portion and a first guide portion for pushing the transmission rod which are connected in sequence, the first driving member has a first connecting position for connecting to the first fixed portion, and the first extending portion is passed through the main shaft; the second connecting member includes a second fixed portion, a second extending portion and a second guide portion for pushing the transmission rod which are connected in sequence, the second driving member has a second connecting position for connecting to the second fixed portion, and the second extension portion is passed through the main shaft.

[0008] In one embodiment, the first guide portion has a first inclined surface for pushing the transmission rod, and the second guide portion has a second inclined surface for pushing the transmission rod, and both ends of the transmission rod are respectively abutted against the first inclined surface and the second inclined surface, and the first inclined surface and the second inclined surface are both inclined relative to the central axis of the rotating wheel.

[0009] In one embodiment, the main shaft is provided with a receiving groove, and the first guide portion, the second guide portion and the transmission rod are all arranged in the receiving groove.

[0010] In one embodiment, the first driving member and the rotating wheel, the second driving member and the rotating wheel are all connected for unidirectional rotation via a ratchet mechanism, a one-way bearing or an overrunning clutch.

[0011] In one embodiment, the ratchet mechanism comprises a ratchet and a pawl;

[0012] The pawl is connected to the wheel, and the outer circumference or inner wall of the first pedal member and the second pedal member has a plurality of annularly distributed ratchet teeth, so that the first pedal member and the second pedal member are the ratchet wheels;

[0013] Alternatively, the pawl is connected to the first pedal member and the second pedal member, and the wheel has annularly distributed ratchet teeth, so that the wheel is the ratchet wheel;

[0014] Alternatively, one of the ratchet or the pawl is connected to the wheel, and the other of the ratchet or the pawl is connected to the first pedal member and the second pedal member.

[0015] The present invention also provides a bicycle, comprising the above-mentioned reciprocating drive mechanism.

[0016] In one embodiment, the first driving member and the second driving member are both pedal shafts, and the rotating wheel is a wheel.

[0017] The beneficial effects of the reciprocating drive mechanism and bicycle provided by the present invention are as follows: compared with the prior art, the reciprocating drive mechanism of the present invention includes a rotating wheel, a first driving member, a second driving member and a transmission assembly, the first driving member and the second driving member are both connected to the rotating wheel for unidirectional rotation, and the first driving member and the second driving member can only drive the rotating wheel to move in the first direction. When the first driving member drives the rotating wheel to rotate in the first direction, the first connecting member fixedly connected to the first driving member drives the second connecting member and the second driving member to rotate in the second direction through the transmission rod; when the second driving member drives the rotating wheel to rotate in the first direction, the second connecting member fixedly connected to the second driving member drives the first connecting member and the first driving member to rotate in the second direction through the transmission rod. The first direction and the second direction are opposite. In the reciprocating drive mechanism provided by the embodiment of the present invention, there is no need to use a chain sprocket mechanism, and the chain will not fall off or rust. In addition, the reciprocating drive mechanism occupies a small volume and has a relatively simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 A three-dimensional structural diagram of a reciprocating drive mechanism provided in an embodiment of the present invention;

[0020] Figure 2 An exploded structural diagram of a first reciprocating drive mechanism provided by an embodiment of the present invention;

[0021] Figure 3 for Figure 2 A perspective view of a transmission assembly in a first reciprocating drive mechanism provided;

[0022] Figure 4 for Figure 3 A three-dimensional structural diagram of the first connecting member;

[0023] Figure 5 An exploded structural diagram of a first reciprocating drive mechanism provided by an embodiment of the present invention;

[0024] Figure 6 for Figure 5 A perspective view of a transmission assembly in a first reciprocating drive mechanism provided;

[0025] Figure 7 for Figure 6 A three-dimensional structural diagram of the first connecting member;

[0026] Figure 8 A three-dimensional structural diagram of a main shaft provided by an embodiment of the present invention;

[0027] Fig. 9 A three-dimensional structural diagram of a first driving member provided in an embodiment of the present invention.

[0028] Among them, the reference numerals in the figure are:

[0029] 1-first driving member; 11-first connecting position; 12-ratchet; 2-second driving member; 21-second connecting position; 3-rotating wheel; 31-pawl; 4a, 4b-transmission assembly; 41-first connecting member; 411-first fixing portion; 412-first extension portion; 413a, 413b-first guide portion; 4131a, 4131b-first inclined surface; 42-second connecting member; 421-second fixing portion; 422-second extension portion; 423a, 423b-second guide portion; 4231a, 4231b-second inclined surface; 43-transmission rod; 44-spindle; 441-accommodating groove; 442-axle hole; 5-frame. DETAILED DESCRIPTION

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0032] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0034] The reciprocating drive mechanism provided in the embodiment of the present invention is now described.

[0035] See also Figure 1 and Figure 2 In one embodiment of the reciprocating drive mechanism, the reciprocating drive mechanism includes a rotating wheel 3, a first driving member 1, a second driving member 2 and a transmission assembly 4a. The first driving member 1 and the second driving member 2 are respectively arranged on opposite sides of the rotating wheel 3, and the first driving member 1 and the second driving member 2 are both connected to the rotating wheel 3 for unidirectional rotation, and are both used to drive the rotating wheel 3 to rotate in the first direction. That is, when the first driving member 1 rotates in the first direction, the rotating wheel 3 and the first driving member 1 are fixedly connected, and the rotating wheel 3 will rotate together with the first driving member 1; when the first driving member 1 rotates in the second direction, it has no restraining effect on the rotating wheel 3, and is rotationally connected with the rotating wheel 3, and the first driving member 1 can rotate freely. The connection relationship between the second driving member 2 and the rotating wheel 3 is the same as the relationship between the first driving member 1 and the rotating wheel 3, which will not be repeated here. The transmission assembly 4 is used to transmit the movement between the first driving member 1 and the second driving member 2. The transmission assembly 4a includes a first connecting member 41, a transmission rod 43 and a second connecting member 42. The first connecting member 41 is fixed to the first driving member 1, the second connecting member 42 is fixed to the second driving member 2, and the two ends of the transmission rod 43 are respectively connected to the first connecting member 41 and the second connecting member 42.

[0036] More specifically, when the first driving member 1 drives the rotating wheel 3 to rotate in the first direction, the first connecting member 41 rotates with the first driving member 1, and the movement of the first connecting member 41 is transmitted to the second connecting member 42 through the transmission rod 43, so that the second connecting member 42 rotates in the second direction, thereby causing the second driving member 2 to rotate in the second direction. When the second driving member 2 drives the rotating wheel 3 to rotate in the first direction, the second connecting member 42 rotates with the second driving member 2, and the movement of the second connecting member 42 is transmitted to the first connecting member 41 through the transmission rod 43, so that the first connecting member 41 rotates in the second direction, thereby causing the first driving member 1 to rotate in the second direction. Figure 1 , direction A is the first direction, direction B is the second direction, and the rotation directions of the first direction and the second direction are opposite.

[0037] When the reciprocating drive mechanism in the above embodiment is applied to a bicycle, the first drive member 1 drives the rotating wheel 3 to rotate in the first direction, and the second drive member 2 rotates in the second direction accordingly; the second drive member 2 drives the rotating wheel 3 to rotate in the first direction, and the first drive member 1 rotates in the second direction accordingly. The alternating drive of the first drive member 1 and the second drive member 2 causes the first drive member 1 and the second drive member 2 of the bicycle to continuously swing back and forth, and causes the rotating wheel 3 to continuously rotate in the first direction, driving the entire bicycle to move forward.

[0038] The reciprocating drive mechanism of the above embodiment includes a rotating wheel 3, a first driving member 1, a second driving member 2 and a transmission assembly 4a. The first driving member 1 and the second driving member 2 are both connected to the rotating wheel 3 for unidirectional rotation. The first driving member 1 and the second driving member 2 can only drive the rotating wheel 3 to move in the first direction. When the first driving member 1 drives the rotating wheel 3 to rotate in the first direction, the first connecting member 41 fixedly connected to the first driving member 1 drives the second connecting member 42 and the second driving member 2 to rotate in the second direction through the transmission rod 43; when the second driving member 2 drives the rotating wheel 3 to rotate in the first direction, the second connecting member 42 fixedly connected to the second driving member 2 drives the first connecting member 41 and the first driving member 1 to rotate in the second direction through the transmission rod 43. The first direction and the second direction are opposite. In the reciprocating drive mechanism provided in the embodiment of the present invention, there is no need to use a chain sprocket mechanism, and the chain will not fall off or rust. In addition, the reciprocating drive mechanism occupies a small volume and has a relatively simple structure.

[0039] See also Figure 3 and Figure 6 In one embodiment of the reciprocating drive mechanism, the transmission assembly 4a (4b) includes a first connecting member 41, a transmission rod 43 and a second connecting member 42. The transmission assembly 4a (4b) also includes a main shaft 44. The main shaft 44 is inserted into the rotating wheel 3, and the axial direction of the main shaft 44 coincides with the central axis of the rotating wheel 3. When the rotating wheel 3 rotates, the main shaft 44 is relatively stationary. The arrangement of the main shaft 44 facilitates the installation and positioning of the first connecting member 41, the transmission rod 43 and the second connecting member 42, so that the first connecting member 41, the transmission rod 43 and the second connecting member 42 can work more accurately.

[0040] See also Figure 3 and Figure 4 In one embodiment of the transmission assembly 4a, the transmission rod 43 and the main shaft 44 are slidably connected, and the sliding direction of the transmission rod 43 is parallel to the axial direction of the main shaft 44. In this way, when the first connecting member 41 rotates with the first driving member 1, the first connecting member 41 pushes the transmission rod 43 in the axial direction of the main shaft 44, so that the transmission rod 43 pushes the second connecting member 42 in the axial direction of the main shaft 44, and the second connecting member 42 converts the axial motion along the main shaft 44 into a rotational motion, so that the second driving member 2 rotates in the opposite direction; when the second connecting member 42 rotates with the second driving member 2, it can also push the second driving member 2 to rotate in the opposite direction. The first connecting member 41 and the second connecting member 42 can both convert linear motion into rotational motion, and can also convert rotational motion into linear motion. The first connecting member 41 is provided with a first inclined surface 4131a on the side facing the transmission rod 43, and the second connecting member 42 is provided with a second inclined surface 4231a on the side facing the transmission rod 43. The first inclined surface 4131a and the second inclined surface 4231a are both helical surfaces, so linear motion can be converted into rotational motion, and rotational motion can be converted into linear motion.

[0041] See also Figures 5 to 7 In one embodiment of the transmission assembly 4b, the transmission rod 43 is swingably connected to the main shaft 44, and the transmission rod 43 can rotate relative to the main shaft 44, and the rotation center axis of the transmission rod 43 is perpendicular to the axial direction of the main shaft 44. When the transmission rod 43 swings relative to the main shaft 44, the angle between the axial direction of the transmission rod 43 and the axial direction of the main shaft 44 decreases to zero and then gradually increases, and the reciprocating motion forms the swing of the transmission rod 43. When the first driving member 1 drives the rotating wheel 3 to rotate, the first connecting member 41 rotates, and the rotation of the first connecting member 41 drives the rotation of the transmission rod 43, and the rotation of the transmission rod 43 drives the rotation of the second connecting member 42, so that the second driving member 2 rotates in the second direction. The rotation of the first connecting member 41 and the second connecting member 42 can cause the transmission rod 43 to rotate accordingly. The first connecting member 41 is provided with a first inclined surface 4131b on the side facing the transmission rod 43, and the second connecting member 42 is provided with a second inclined surface 4231b on the side facing the transmission rod 43. The first inclined surface 4131b and the second inclined surface 4231b can guide the transmission rod 43, and can smoothly transmit the rotation of the first connecting member 41 and the second connecting member 42 to the transmission rod 43, and can also smoothly transmit the rotation of the transmission rod 43 to the first connecting member 41 and the second connecting member 42. The first inclined surface 4131b and the second inclined surface 4231b are planes, and are inclined relative to the central axis of the rotating wheel 3, so that the transmission rod 43 can transmit the rotation. The inclination angles of the first inclined surface 4131b and the second inclined surface 4231b are not limited here, and can push the transmission rod 43 to rotate.

[0042] See also Figure 3 and Figure 6 In one embodiment of the transmission assembly, one end of the first connecting member 41 is disposed in the main shaft 44, and the main shaft 44 has a limiting effect on the first connecting member 41, so that the first connecting member 41 rotates around the axis of the main shaft 44 as the central axis. The other end of the first connecting member 41 is fixed to the first driving member 1, so that the first driving member 1 and the first connecting member 41 move synchronously. One end of the second connecting member 42 is disposed in the main shaft 44, and the main shaft 44 has a limiting effect on the second connecting member 42, so that the second connecting member 42 rotates around the axis of the main shaft 44 as the central axis. The other end of the second connecting member 42 is fixed to the second driving member 2, so that the second connecting member 42 and the second driving member 2 move synchronously.

[0043] See also Figure 3 , Figure 4 , Figure 6 and Figure 7In one embodiment of the transmission assembly 4a (4b), the first connecting member 41 includes a first fixing portion 411, a first extending portion 412 and a first guiding portion 413a (413b) connected in sequence. The first fixing portion 411 is fixed to the first driving member 1. The first fixing portion 411 and the first driving member 1 can be fixedly connected by mutual clamping, mutual welding, screw fixing, etc. When the first fixing portion 411 and the first driving member 1 are mutually clamped, as shown in FIG. Fig. 9 As shown, the first driving member 1 is provided with a first connection position 11, and the first fixing portion 411 is inserted into the first connection position 11. When the first driving member 1 rotates, the first fixing portion 411 rotates with the first driving member 1. More specifically, the first connection position 11 is arranged along the radial direction of the first driving member 1, and the first fixing portion 411 is radially inserted into the first connection position 11, so that the circumferential movement of the first fixing portion 411 is synchronized with the first driving member 1, and the first extension portion 412 is arranged through the main shaft 44 to save the radial space occupied by the transmission assembly. At this time, the first fixing portion 411 and the first extension portion 412 are vertically connected. The first guide portion 413a (413b) has the above-mentioned first inclined surface 4131a (413b): when the transmission rod 43 is slidably connected to the main shaft 44, the first inclined surface 4131a is a spiral surface; when the transmission rod 43 is rotationally connected to the main shaft 44, the first inclined surface 4131b is a plane.

[0044] Correspondingly, the second connecting member 42 includes a second fixing portion 421, a second extension portion 422 and a second guide portion 423a (423b) connected in sequence. The second fixing portion 421 is fixed in the second driving member 2, and the second fixing portion 421 and the second driving member 2 can be fixedly connected by means of mutual clamping, mutual welding, screw fixing, etc. When the second fixing portion 421 and the second driving member 2 are mutually clamped, the first driving member 1 is provided with a second connecting position 21, and the second fixing portion 421 is inserted into the second connecting position 21. When the second driving member 2 rotates, the second fixing portion 421 rotates with the second driving member 2. More specifically, the second connecting position 21 is arranged along the radial direction of the second driving member 2, and the second fixing portion 421 is radially inserted into the second connecting position 21, so that the circumferential movement of the second fixing portion 421 is synchronized with the second driving member 2, and the second extension portion 422 is arranged in the main shaft 44 to save the radial space occupied by the transmission assembly 4. The second guide portion 423a (423b) has the second inclined surface 4231a (4231b) mentioned above: when the transmission rod 43 is slidably connected to the main shaft 44, the second inclined surface 4231b is a spiral surface; when the transmission rod 43 is rotationally connected to the main shaft 44, the second inclined surface 4231b is a plane. The first connection position 11 and the second connection position 21 can be a slot.

[0045] See also Figure 8In one embodiment of the main shaft 44, a receiving groove 441 is provided in the middle of the main shaft 44, and the receiving groove 441 is radially opened so that the middle of the main shaft 44 is semicircular. The first guide portion 413a (413b), the second guide portion 423a (423b) and the transmission rod 43 are all arranged in the receiving groove 441, so that the first extension portion 412 and the second extension portion 422 are axially arranged through the main shaft 44, so that the first extension portion 412 and the second extension portion 422 can rotate coaxially with the rotating wheel 3, and the transmission rod 43 can also be protected and space can be saved. In addition, the side surfaces of the first guide portion 413a (413b) and the second guide portion 423a (423b) contacting the inner wall of the receiving groove 441 have a limiting effect on the first guide portion 413a (413b) and the second guide portion 423a (423b), preventing the transmission rod 43 from being separated from the first connecting member 41 and the second connecting member 42, so that the transmission rod 43 swings within a limited angle range. The main shaft 44 is also provided with two shaft holes 442, which are connected to the receiving groove 441, and the first extension portion 412 and the second extension portion 422 are penetrated through the shaft holes 442.

[0046] In any of the above-mentioned embodiments of the reciprocating drive mechanism, the first drive member 1 and the rotating wheel 3, the second drive member 2 and the rotating wheel 3 are all connected to achieve unidirectional rotation through a ratchet mechanism, a one-way bearing or an overrunning clutch. Any mechanism capable of achieving unidirectional rotation is applicable to the reciprocating drive mechanism of the present invention.

[0047] See also Figure 2 and Figure 5 In one embodiment of the reciprocating drive mechanism, the first drive member 1 and the rotating wheel 3, the second drive member 2 and the rotating wheel 3 are all connected to each other in one-way rotation through a ratchet mechanism. The ratchet mechanism includes a ratchet wheel and a pawl 31, and the pawl 31 is connected to the rotating wheel 3. Fig. 9 As shown, the first driving member 1 and the second driving member 2 have a circular inner cavity, and the circumferential inner wall of the circular inner cavity has continuously distributed ratchet teeth 12. When the first driving member 1 drives the rotating wheel 3 to rotate in the first direction, the ratchet 31 is clamped between any two adjacent ratchet teeth 12. The first driving member 1 is synchronized with the movement of the rotating wheel 3, and the rotation is transmitted to the second driving member 2 through the transmission assembly 4. The second driving member 2 rotates in the second direction, and the ratchet 31 can retract when it hits the ratchet teeth 12, so the rotation of the second driving member 2 will not affect the forward rotation of the rotating wheel 3. The ratchet teeth 12 are arranged inside the circular inner cavity, and dust and debris are not easy to enter, which will not affect the movement of the ratchet mechanism. In addition, the ratchet and the driving member are integrated into one, which can reduce the overall volume of the mechanism.

[0048] In another embodiment, the outer rings of the first drive member 1 and the second drive member 2 are provided with continuously distributed ratchet teeth 12, so that the first drive member 1 and the second drive member 2 themselves form ratchets. In another embodiment, a pawl is connected to the first drive member 1 and the second drive member 2, and the rotating wheel 3 has an annularly distributed ratchet teeth 12, so that the wheel 3 is a ratchet. In another embodiment, one of the ratchet or the pawl is connected to the rotating wheel 3, and the other of the ratchet or the pawl is connected to the first drive member 1 and the second drive member 2, so that the movement of the first drive member 1 and the second drive member 2 is synchronized with the movement of the ratchet.

[0049] The embodiment of the present invention further provides a bicycle, which includes the reciprocating drive mechanism in any of the above embodiments, and also includes components such as handlebars, a frame 5, and a seat.

[0050] The bicycle of the above embodiment adopts the above reciprocating drive mechanism. When the first driving member 1 drives the rotating wheel 3 to rotate in the first direction, the first connecting member 41 fixedly connected to the first driving member 1 drives the second connecting member 42 and the second driving member 2 to rotate in the second direction through the transmission rod 43; when the second driving member 2 drives the rotating wheel 3 to rotate in the first direction, the second connecting member 42 fixedly connected to the second driving member 2 drives the first connecting member 41 and the first driving member 1 to rotate in the second direction through the transmission rod 43. The first direction and the second direction are opposite. In the bicycle provided by the embodiment of the present invention, there is no need to use a chain sprocket mechanism, and the chain will not fall off or rust. In addition, the reciprocating drive mechanism occupies a small volume and has a simpler structure.

[0051] More specifically, the reciprocating drive mechanism is used for the transmission of the wheel, the first drive member 1 and the second drive member 2 are both pedal shafts, and the rotating wheel 3 is a wheel. Optionally, both ends of the main shaft 44 pass through the first drive member 1 and the second drive member 2, and the frame 5 is fixed to both ends of the main shaft 44.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Reciprocating drive mechanism, characterized in that: The invention comprises a rotating wheel, a first driving member driving the rotating wheel to rotate in a first direction, a second driving member driving the rotating wheel to rotate in the first direction, and a transmission assembly connecting the first driving member and the second driving member and making the first driving member and the second driving member rotate in opposite directions, the first driving member and the second driving member are respectively arranged on the left and right sides of the rotating wheel, the first driving member and the second driving member are both connected to the rotating wheel for unidirectional rotation, and the transmission assembly comprises a first connecting member fixed to the first driving member, a second connecting member fixed to the second driving member, and a transmission rod for transmitting movement between the first connecting member and the second connecting member; The transmission assembly further comprises a main shaft, the main shaft is passed through the rotating wheel, and the axial direction of the main shaft coincides with the central axis of the rotating wheel; the transmission rod is slidably connected to the main shaft, and the sliding direction of the transmission rod is parallel to the axial direction of the main shaft, or the transmission rod is swingably connected to the main shaft, and the rotation center axis of the transmission rod is perpendicular to the axial direction of the main shaft; The first connecting member includes a first fixing portion, a first extending portion and a first guide portion for pushing the transmission rod, which are connected in sequence. The first driving member has a first connecting position for connecting the first fixing portion, and the first extending portion is inserted into the main shaft. The second connecting member includes a second fixing portion, a second extending portion and a second guide portion for pushing the transmission rod, which are connected in sequence. The second driving member has a second connecting position for connecting the second fixing portion, and the second extending portion is inserted into the main shaft. The first guide portion has a first inclined surface for pushing the transmission rod, the second guide portion has a second inclined surface for pushing the transmission rod, and two ends of the transmission rod are respectively in contact with the first inclined surface and the second inclined surface; When the transmission rod is swingably connected to the main shaft, the first inclined surface and the second inclined surface are both planes, and the first inclined surface and the second inclined surface are both inclined relative to the central axis of the rotating wheel; When the transmission rod is slidably connected to the main shaft, the first inclined surface and the second inclined surface are both helical surfaces.

2. The reciprocating drive mechanism according to claim 1, characterized in that: One end of the first connecting member is arranged in the main shaft, and the other end of the first connecting member is connected to the first driving member; one end of the second connecting member is arranged in the main shaft, and the other end of the second connecting member is connected to the second driving member.

3. The reciprocating drive mechanism according to claim 1, characterized in that: The main shaft is provided with a receiving groove, and the first guide portion, the second guide portion and the transmission rod are all arranged in the receiving groove.

4. The reciprocating drive mechanism according to any one of claims 1 to 3, characterized in that: The first driving member and the rotating wheel, the second driving member and the rotating wheel are all connected for unidirectional rotation via a ratchet mechanism, a one-way bearing or an overrunning clutch.

5. The reciprocating drive mechanism according to claim 4, characterized in that: The ratchet mechanism comprises a ratchet and a pawl; The pawl is connected to the rotating wheel, and the outer circumference or inner wall of the first driving member and the second driving member has a plurality of annularly distributed ratchet teeth, so that the first driving member and the second driving member are the ratchet wheels; Alternatively, the pawl is connected to the first driving member and the second driving member, and the rotating wheel has annularly distributed ratchet teeth, so that the rotating wheel is the ratchet wheel; Alternatively, one of the ratchet wheel or the pawl is connected to the rotating wheel, and the other of the ratchet wheel or the pawl is connected to the first driving member and the second driving member.

6. A bicycle, characterized in that: It comprises the reciprocating drive mechanism as described in any one of claims 1 to 5.

7. The bicycle according to claim 6, characterized in that: The first driving member and the second driving member are both pedal shafts, and the rotating wheel is a wheel.

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