Reciprocating type bicycle transmission mechanism

Abstract

The utility model discloses a reciprocating type bicycle transmission mechanism, which belongs to the technical field of bicycles and comprises a positioning piece and a transmission chain wheel, the transmission chain wheel is rotatably connected in the positioning piece, transmission shafts are mounted at axes on two sides of the transmission chain wheel, and ratchets are integrally arranged at positions, close to the ends, of the transmission shafts. The end of the transmission shaft is rotationally connected with a rotating disc through a bearing, a one-way transmission structure is arranged between the rotating disc and the transmission shaft, and the one-way transmission structure comprises a belt groove, a jack tooth, a spring, an extension piece, a belt and a pedal. The pedal plate is treaded to drive the rotating disc to drive the transmission chain wheel, after the pedal plate is released, the volute spiral spring drives the rotating disc to idle, meanwhile, the pedal plate is made to return, compared with an existing driving structure, a user only needs to move up and down vertically, more labor is saved, meanwhile, the pedal plate is more friendly to joints, and the pedal plate is more convenient to use. And the variety of bicycle types is increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of bicycles, in particular to a reciprocating bicycle transmission mechanism. Background Art

[0002] Bicycles are the most common human-driven manned vehicles in daily life. Their power structures have also evolved into many types, including chain drive, gear drive, belt drive, etc. There are also many types of bicycles, including scenic area multi-person bicycles, three-wheeled bicycles, etc., but these bicycles all use the user's leg power to drive them.

[0003] The common driving method is that the user uses the power of the legs to drive the cranks of the bicycle, which in turn drives the sprockets to transmit the power. The two legs alternate and repeatedly move in a circular motion to drive the vehicle forward. However, the rider and the cranks are both performing circular motions, which puts additional pressure on the user's lower limb joints. When some people with less flexible joints or rehabilitation patients use it, there are certain disadvantages. Therefore, it is necessary to improve the existing transmission mechanism and design a new transmission structure. Utility Model Content

[0004] The purpose of the utility model is to provide a reciprocating bicycle transmission mechanism in order to solve the above-mentioned problems.

[0005] The technical solution adopted by the utility model is as follows: a reciprocating bicycle transmission mechanism, including a positioning member and a transmission sprocket, wherein the positioning member is rotatably connected to the transmission sprocket, a transmission shaft is installed at the axis of both sides of the transmission sprocket, ratchets are integrally arranged near the ends of the transmission shaft, and the ends of the transmission shaft are rotatably connected to a rotating disk through a bearing;

[0006] A one-way transmission structure is provided between the rotating disk and the transmission shaft;

[0007] The one-way transmission structure includes a belt groove, a jack tooth, a spring, an extension piece, a belt, and a pedal;

[0008] The rotating disk has jack teeth evenly distributed inside the rotating disk with the axis as the base point, a spring is connected to the back of the jack teeth, and the other end of the spring is connected to the rotating disk, a belt groove is integrated on the outside of the rotating disk, a belt is arranged inside the belt groove, and one end of the belt is fixedly connected to a pedal;

[0009] A support is provided outside the transmission shaft, a scroll spring protection shell is fixedly installed outside the support, and a scroll spring is matched inside the scroll spring protection shell;

[0010] An extension piece is extended from the outer side of the rotating disk, and the extension piece is fixedly connected to the pulling end of the spiral spring.

[0011] The ratchet teeth are distributed in an array around the axis of the transmission shaft.

[0012] The other end of the belt is fixedly connected to the belt groove.

[0013] The end surface of the transmission shaft is connected to the end surface of the support member via a rotating shaft.

[0014] The transmission sprocket is externally connected to a driving sprocket through a chain transmission, and the driving sprocket is connected to an external wheel.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0016] 1. In the utility model, the pedal is stepped on to drive the rotating disk to drive the transmission sprocket. After the pedal is released, the scroll spring drives the rotating disk to idle and the pedal returns to its original position. Compared with the existing drive structure, this design requires the user to move his feet vertically up and down, which is more labor-saving and more friendly to the joints, increasing the diversity of bicycle categories. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 It is a schematic side section diagram of the one-way transmission structure in the utility model;

[0019] Figure 3 It is a schematic diagram of the front cross-section structure of the one-way transmission in the utility model.

[0020] Markings in the figure: 1. Support member; 101. Volute spring protective shell; 102. Volute spring; 2. Transmission shaft; 201. Ratchet; 202. Bearing; 3. Transmission sprocket; 4. Chain; 5. Drive sprocket; 6. Rotating plate; 601. Belt groove; 602. Jack tooth; 6021. Spring; 603. Extension member; 7. Belt; 8. Foot pedal; 9. Positioning member. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In the utility model:

[0023] Reference Figure 1-3A reciprocating bicycle transmission mechanism includes a positioning member 9 and a transmission sprocket 3. The positioning member 9 is rotatably connected to the transmission sprocket 3. A transmission shaft 2 is installed at the axis centers on both sides of the transmission sprocket 3. Ratchets 201 are integrally provided near the ends of the transmission shaft 2. The ends of the transmission shaft 2 are rotatably connected to a rotating disk 6 through bearings 202. The ratchet teeth 201 are distributed in an array around the axis center of the transmission shaft 2. Through the fit between the ratchet teeth 201 and the jack teeth 602, when the rotating disk 6 rotates clockwise, the jack teeth 602 drive the ratchet teeth 201, thereby causing the transmission shaft 2 to synchronously drive the transmission sprocket 3 to rotate.

[0024] A one-way transmission structure is provided between the rotating disk 6 and the transmission shaft 2;

[0025] The one-way transmission structure includes a belt groove 601, a gear 602, a spring 6021, an extension piece 603, a belt 7, and a pedal 8;

[0026] Inside the rotating disk 6, there are jack teeth 602 evenly distributed and rotating around the axis as the base point. A spring 6021 is connected to the back of the jack teeth 602, and the other end of the spring 6021 is connected to the rotating disk 6. A belt groove 601 is integrated with the outside of the rotating disk 6. A belt 7 is arranged inside the belt groove 601, and one end of the belt 7 is fixedly connected to a pedal 8; the other end of the belt 7 is fixedly connected to the belt groove 601. When the rotating disk 6 rotates clockwise, the ratchet 201 fits with the jack teeth 602 and drives. At this time, the two transmission shafts 2 input power alternately, ensuring that the transmission sprocket 3 is always in motion.

[0027] There is a support member 1 on the outside of the transmission shaft 2, and the end face of the transmission shaft 2 is connected to the end face of the support member 1 through a rotating shaft. A spiral spring protection shell 101 is fixedly installed on the outside of the support member 1, and a spiral spring 102 is arranged inside the spiral spring protection shell 101. An extension member 603 extends from the outside of the rotating disk 6, and the extension member 603 is fixedly connected to the pulling end of the spiral spring 102. When one of the foot pedals 8 drops, the extension member 603 on the rotating disk 6 also rotates to pull out the spiral spring 102, so that the spiral spring 102 is subjected to force. When the user no longer applies force to the foot pedal 8, the spiral spring 102 drives the rotating disk 6 to rotate counterclockwise. At this time, the ratchet 201 and the jack tooth 602 do not engage, so that the rotating disk 6 rotates idly.

[0028] Furthermore, the transmission sprocket 3 is externally connected to a driving sprocket 5 via a chain 4, and the driving sprocket 5 is connected to an external wheel.

[0029] Working principle: First, after one of the foot pedals 8 is lowered, the extension piece 603 on the rotating disk 6 also rotates, pulling out the spiral spring 102, so that the spiral spring 102 is subjected to force. At the same time, the ratchet teeth 201 are distributed in an array around the axis of the transmission shaft 2. Through the fit between the ratchet teeth 201 and the jack teeth 602, the jack teeth 602 can drive the ratchet teeth 201 when the rotating disk 6 rotates clockwise, and then the transmission shaft 2 synchronously drives the transmission sprocket 3 to rotate. Then, when the user no longer applies force to the foot pedal 8, the spiral spring 102 drives the rotating disk 6 to rotate counterclockwise. At this time, the ratchet teeth 201 and the jack teeth 602 do not engage, so that the rotating disk 6 idles. Based on the above, the two transmission shafts 2 are used for alternating power input to ensure that the transmission sprocket 3 is always in a state of motion.

[0030] 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. A reciprocating bicycle transmission mechanism, comprising a positioning member (9) and a transmission sprocket (3), wherein the positioning member (9) is rotatably connected to the transmission sprocket (3), characterized in that: A transmission shaft (2) is installed at the axis of both sides of the transmission sprocket (3), and ratchet teeth (201) are integrally provided near the ends of the transmission shaft (2). The ends of the transmission shaft (2) are rotatably connected to a rotating disk (6) via bearings (202); A one-way transmission structure is provided between the rotating disk (6) and the transmission shaft (2); The one-way transmission structure comprises a belt groove (601), a gear (602), a spring (6021), an extension piece (603), a belt (7), and a foot pedal (8); The rotating disk (6) has gears (602) uniformly distributed and rotating around the axis as a base point. The back of the gears (602) is connected to a spring (6021), and the other end of the spring (6021) is connected to the rotating disk (6). The rotating disk (6) is integrally provided with a belt groove (601) on the outside. The belt groove (601) has a belt (7) inside. One end of the belt (7) is fixedly connected to a pedal (8). A support member (1) is provided on the outside of the transmission shaft (2); a volute spring protection shell (101) is fixedly installed on the outside of the support member (1); and a volute spring (102) is provided inside the volute spring protection shell (101); An extension piece (603) extends from the outside of the rotating disk (6), and the extension piece (603) is fixedly connected to the pulling end of the spiral spring (102).

2. A reciprocating bicycle transmission mechanism as claimed in claim 1, characterized in that: The ratchet teeth (201) are distributed in an array around the axis of the transmission shaft (2).

3. A reciprocating bicycle transmission mechanism as claimed in claim 1, characterized in that: The other end of the belt (7) is fixedly connected to the belt groove (601).

4. A reciprocating bicycle transmission mechanism as claimed in claim 1, characterized in that: The end surface of the transmission shaft (2) is connected to the end surface of the support member (1) via a rotating shaft.

5. A reciprocating bicycle transmission mechanism as claimed in claim 1, characterized in that: The transmission sprocket (3) is externally connected to a driving sprocket (5) via a chain (4), and the driving sprocket (5) is connected to an external wheel.

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