Protection structure for transmission belt of electric bicycle

Abstract

The utility model discloses a protection structure for a transmission belt of an electric bicycle, the protection structure comprises a connecting plate, a mounting plate and a protection plate, the mounting plate and the protection plate are respectively mounted on two sides of the connecting plate, the mounting plate and the protection plate are both perpendicular to the connecting plate, and the connecting plate is connected with the mounting plate. The connecting plate, the mounting plate and the protective plate define a protective cavity for allowing a synchronous belt to enter the position of a driving synchronous belt wheel; the mounting plate is used for being mounted between a driving synchronous pulley and a frame, and the mounting plate is detachably mounted on the frame through a connecting piece. The transmission device has the effects that impurities entering the meshing position of the synchronous belt and the driving synchronous belt wheel are reduced, and the transmission smoothness is improved.

Description

Technical Field

[0001] The present invention relates to the field of electric vehicles, and in particular to a protection structure for a transmission belt of an electric bicycle. Background Art

[0002] At present, with the continuous development of society, electric bicycles have become a common means of transportation for people to travel. In electric bicycles, the transmission belt, as a key component for power transmission, its stability and durability directly affect the overall performance and user experience of the electric bicycle.

[0003] Existing electric bicycles include a frame, a driving synchronous pulley, a driven synchronous pulley and a synchronous belt. The driving synchronous pulley is sleeved on the rotating shaft of a mid-mounted motor installed on the frame, the driven synchronous pulley is sleeved on the rotating shaft of the rear wheel, the synchronous belt is wound around the driving synchronous pulley and the driven synchronous pulley at the same time, and the synchronous belt meshes with both the driving synchronous pulley and the driven synchronous pulley.

[0004] In view of the above related technologies, since a mid-mounted motor is installed on the electric bicycle, the distance between the driving synchronous pulley and the frame is small, and it is difficult to use the traditional fully enclosed method to protect the driving synchronous pulley and the synchronous belt. Therefore, generally no protection structure is provided, which may cause impurities such as branches and stones to enter together when the synchronous belt is transmitted to the driving synchronous pulley during riding, resulting in problems such as damage to the synchronous belt and detachment from the driving synchronous pulley. Summary of the Invention

[0005] In order to reduce the entry of impurities into the meshing portion of the synchronous belt and the driving synchronous pulley and improve the transmission smoothness, the present application provides a protection structure for a transmission belt of an electric bicycle.

[0006] A protection structure for a transmission belt of an electric bicycle provided by the present application adopts the following technical solutions:

[0007] A protection structure for a transmission belt of an electric bicycle includes a connecting plate, a mounting plate and a protection plate. The mounting plate and the protection plate are respectively installed on both sides of the connecting plate. The mounting plate and the protection plate are both perpendicular to the connecting plate. A protection cavity is formed between the connecting plate, the mounting plate and the protection plate for the synchronous belt to extend into the position where the driving synchronous pulley is located. The mounting plate is used to be installed between the driving synchronous pulley and the frame, and the mounting plate is detachably installed on the frame through a connecting member.

[0008] By adopting the above technical solution, before installing the driving synchronous pulley, first fix the mounting plate on the vehicle frame through the connecting piece, and then sequentially install the driving synchronous pulley, the sprocket and the synchronous belt, so that the synchronous belt extends into the protection cavity at the position of the driving synchronous pulley, thereby blocking certain impurities such as branches and stones, and also reducing the situation where the rider's trouser legs are caught; this structure is easy to install and has a small requirement for the installation space, which can protect the synchronous belt and ensure the smoothness of the transmission between the synchronous belt and the driving synchronous pulley.

[0009] Preferably, the mounting plate includes a protection part and a mounting part, and the protection part is arranged opposite to the guard plate; the mounting part is integrally formed with the protection part, and the connecting piece is used to detachably mount the mounting part on the vehicle frame.

[0010] By adopting the above technical solution, in order to facilitate the installation of the mounting plate, only the protection part is arranged opposite to the guard plate, and the mounting part is not arranged opposite to the guard plate. That is, when installing the mounting plate on the vehicle frame through the connecting piece, the obstruction to the installation tool is reduced, and the operator can operate more conveniently.

[0011] Preferably, a plurality of through holes are formed in the mounting part, the connecting piece is a bolt, and the bolt passes through the through hole and is used for threaded installation on the vehicle frame.

[0012] By adopting the above technical solution, during installation, directly pass the bolt through the through hole and then screw it into the vehicle frame to complete the installation of the mounting plate, that is, complete the installation of the entire protection structure. This installation method is stable and easy to install.

[0013] Preferably, a plug-in block is arranged on the side of the mounting plate away from the guard plate, a plug-in groove is formed in the vehicle frame, the plug-in groove extends in the vertical direction, the top end of the plug-in groove communicates with the outside of the vehicle frame, and the plug-in block is plugged into the vehicle frame through the plug-in groove.

[0014] By adopting the above technical solution, inserting the plug-in block into the plug-in groove can make the through hole correspond to the installation position of the vehicle frame, so that it is more rapid to subsequently pass the bolt through the through hole and thread it on the vehicle frame, improving the installation efficiency.

[0015] Preferably, it further includes a pair of pre-insertion rods preset on the vehicle frame, the two pre-insertion rods are arranged at intervals in the extending direction of the synchronous belt, and pre-insertion holes are formed on the side of the mounting part away from the connecting plate, and the pre-insertion rods are clamped in the pre-insertion holes.

[0016] By adopting the above technical solution, align the pre-insertion holes with the pre-insertion rods so that the pre-insertion rods are inserted into the pre-insertion holes, thereby making the through hole correspond to the installation position of the vehicle frame, so that it is more rapid to subsequently pass the bolt through the through hole and thread it on the vehicle frame, improving the installation efficiency.

[0017] Preferably, a pair of the through holes are arranged at intervals along the extending direction of the synchronous belt.

[0018] By adopting the above technical solution, the whole protection structure is more stably installed, and the situation of swinging is reduced.

[0019] Preferably, the guard plate is in an arc shape adapted to the outer shape of the toothed disc.

[0020] By adopting the above technical solution, after the protection structure is installed, the outer guard plate and the toothed disc are more tightly matched, and the gap is reduced.

[0021] Preferably, arc-shaped chamfers are provided at the connection between the connecting plate and the mounting plate and at the connection between the connecting plate and the guard plate.

[0022] By adopting the above technical solution, the sharp parts of the protection structure are reduced, and the situation of scratching is reduced.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. Before installing the driving synchronous pulley, first fixedly install the mounting plate on the vehicle frame through the connecting piece, and then sequentially install the driving synchronous pulley, the toothed disc and the synchronous belt, so that the synchronous belt extends into the protection cavity at the position of the driving synchronous pulley, thereby a certain block can be made for impurities such as branches and stones, and the situation of the rider's trouser legs being caught can also be reduced; the structure is simply installed and has a small requirement for the installation space, which can protect the synchronous belt and ensure the transmission smoothness between the synchronous belt and the driving synchronous pulley;

[0025] 2. During installation, directly pass the bolt through the through hole and then screw it into the vehicle frame to complete the installation of the mounting plate, that is, complete the installation of the whole protection structure. This installation method is stable and simple.

[0026] 3. Insert the plugging block into the plugging slot, or align the pre-insertion hole with the pre-insertion rod, so that the pre-insertion rod is stuck into the pre-insertion hole, then the installation position of the through hole and the vehicle frame can be corresponding, thereby making it more rapid to thread the bolt through the through hole and install it on the vehicle frame later, and improving the installation efficiency. Brief Description of the Drawings

[0027] Figure 1 is a schematic structural diagram of the protection structure of Embodiment 1 of the present application installed on the vehicle frame.

[0028] Figure 2 is a schematic overall structural diagram of Embodiment 1 of the present application.

[0029] Figure 3It is a structural cross-sectional view of the mounting plate of Embodiment 1 of the present application mounted on the vehicle frame.

[0030] Figure 4 It is a schematic structural view of the protection structure of Embodiment 2 of the present application mounted on the vehicle frame.

[0031] Figure 5 Is Figure 4 A partial enlarged view of A in

[0032] Explanation of reference numerals:

[0033] 1. Connecting plate; 2. Mounting plate; 21. Protection part; 22. Mounting part; 23. Through hole; 24. Insertion block; 25. Pre-insertion hole; 3. Guard plate; 4. Protection cavity; 5. Bolt; 6. Insertion slot; 7. Pre-insertion rod; 101. Vehicle frame; 102. Driving synchronous pulley; 103. Synchronous belt; 104. Tooth disc. Detailed implementation manners

[0034] The following will Figures 1-5 make a further detailed description of the present application.

[0035] Embodiment 1 of the present application discloses a protection structure for a transmission belt of an electric bicycle.

[0036] Embodiment 1

[0037] Referring to Figure 1 and Figure 2 , the protection structure includes a connecting plate 1, a mounting plate 2 and a guard plate 3. The connecting plate 1 extends in the driving direction of the synchronous belt 103. The mounting plate 2 and the guard plate 3 are respectively connected to both sides in the width direction of the connecting plate 1. The mounting plate 2 and the guard plate 3 are both perpendicular to the connecting plate 1. Arc-shaped chamfers are provided at the joints between the connecting plate 1 and the mounting plate 2, and between the connecting plate 1 and the guard plate 3. A protection cavity 4 is formed between the connecting plate 1, the mounting plate 2 and the guard plate 3 for the synchronous belt 103 to extend into the position where it enters the driving synchronous pulley 102. When the synchronous belt 103 extends into the protection cavity 4 at the position where it enters the driving synchronous pulley 102, there is a gap between the synchronous belt 103 and the side wall of the protection cavity 4. The mounting plate 2 is used to be mounted between the driving synchronous pulley 102 and the vehicle frame 101. The mounting plate 2 is detachably mounted on the vehicle frame 101 through a connecting member, so as to block impurities such as branches and stones. The guard plate 3 is in an arc shape adapted to the outer shape of the tooth disc 104. After the mounting plate 2 is mounted on the vehicle frame 101, the edge of the guard plate 3 is consistent with the edge shape of the tooth disc 104.

[0038] Referring to Figure 2, the mounting plate 2 includes a protection part 21 and a mounting part 22. The protection part 21 is disposed opposite to the guard plate 3, while the mounting part 22 is not disposed opposite to the guard plate 3; the mounting part 22 and the protection part 21 are integrally formed, and the connecting member is used to detachably mount the mounting part 22 on the vehicle frame 101; the mounting plate 2 is provided with a pair of through holes 23 at intervals along the extending direction of the synchronous belt 103; the connecting member is a bolt 5, and a bolt 5 is provided at each through hole 23. The bolt 5 passes through the through hole 23 and is used for threaded mounting on the vehicle frame 101, so as to achieve the detachable mounting of the protection structure.

[0039] Refer to Figure 2 and Figure 3 , a plug-in block 24 is fixedly mounted on the side of the mounting plate 2 away from the guard plate 3, and the plug-in block 24 extends in the vertical direction; the vehicle frame 101 is provided with a plug-in slot 6, the plug-in slot 6 extends in the vertical direction, and the top end of the plug-in slot 6 extends outside the vehicle frame 101. The plug-in block 24 is plugged into the vehicle frame 101 through the plug-in slot 6, so as to achieve the primary positioning of the mounting plate 2 and facilitate the subsequent fixing and mounting of the mounting plate 2 on the vehicle frame 101 by the bolt 5.

[0040] The implementation principle of Embodiment 1 is: before installing the driving synchronous pulley 102, first insert the plug-in block 24 into the plug-in slot 6, then pass the bolt 5 through the through hole 23 and thread it onto the vehicle frame 101, and then sequentially install the driving synchronous pulley 102, the gear disk 104 and the synchronous belt 103, so that the synchronous belt 103 extends into the protection cavity 4 at the position of the driving synchronous pulley 102, thereby blocking impurities such as branches and stones to a certain extent.

[0041] Embodiment 2

[0042] Refer to Figure 4 and Figure 5 , the difference between this embodiment and Embodiment 1 is that the protection structure further includes a pair of pre-insertion rods 7. The two pre-insertion rods 7 are respectively preset on the vehicle frame 101, and the two pre-insertion rods 7 are respectively located directly below the two through holes 23, that is, the two pre-insertion rods 7 are arranged at intervals along the extending direction of the synchronous belt 103; pre-insertion holes 25 are provided at the positions corresponding to the pre-insertion rods 7 on the side of the mounting part 22 away from the connecting plate 1, and the pre-insertion rods 7 are clamped in the pre-insertion holes 25; thus, the primary positioning of the mounting plate 2 can be achieved, which is convenient for subsequent fixing and mounting of the mounting plate 2 on the vehicle frame 101 by the bolt 5.

[0043] The implementation principle of Embodiment 1 is as follows: Before installing the driving synchronous pulley 102, first make the pre-insertion rod 7 snap into the pre-insertion hole 25, then thread the bolt 5 through the through-hole 23 and install it on the vehicle frame 101, and then install the driving synchronous pulley 102, the gear disc 104 and the synchronous belt 103 in sequence, so that the synchronous belt 103 extends into the protection cavity 4 at the position of the driving synchronous pulley 102, thereby blocking certain impurities such as branches and stones.

[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited by this. Therefore, all equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A protective structure for a transmission belt of an electric bicycle, characterized in that: The invention comprises a connecting plate (1), a mounting plate (2) and a guard plate (3), wherein the mounting plate (2) and the guard plate (3) are respectively mounted on two sides of the connecting plate (1), the mounting plate (2) and the guard plate (3) are both perpendicular to the connecting plate (1), and a protective cavity (4) is formed between the connecting plate (1), the mounting plate (2) and the guard plate (3) for a synchronous belt (103) to enter the position of an active synchronous pulley (102); the mounting plate (2) is used to be mounted between the active synchronous pulley (102) and the vehicle frame (101), and the mounting plate (2) is detachably mounted on the vehicle frame (101) via a connecting piece.

2. A protective structure for a transmission belt of an electric bicycle according to claim 1, characterized in that: The mounting plate (2) comprises a protection portion (21) and a mounting portion (22); the protection portion (21) is arranged opposite to the guard plate (3); the mounting portion (22) and the protection portion (21) are integrally formed; and the connecting piece is used to detachably mount the mounting portion (22) on the vehicle frame (101).

3. A protective structure for a transmission belt of an electric bicycle according to claim 2, characterized in that: The mounting portion (22) is provided with a plurality of through holes (23); the connecting member is a bolt (5); the bolt (5) is passed through the through holes (23) and is used for threaded mounting on the vehicle frame (101).

4. A protective structure for a transmission belt of an electric bicycle according to claim 3, characterized in that: A plug-in block (24) is arranged on one side of the mounting plate (2) away from the guard plate (3); the vehicle frame (101) is provided with a plug-in slot (6); the plug-in slot (6) extends in a vertical direction; the top end of the plug-in slot (6) is connected to the outside of the vehicle frame (101); and the plug-in block (24) is plugged into the vehicle frame (101) through the plug-in slot (6).

5. The protective structure for the transmission belt of an electric bicycle according to claim 3, characterized in that: It also includes a pair of pre-insertion rods (7) preset on the vehicle frame (101), the two pre-insertion rods (7) are arranged at intervals in the extension direction of the synchronous belt (103), and a pre-insertion hole (25) is provided on the side of the mounting portion (22) away from the connecting plate (1), and the pre-insertion rod (7) is clamped in the pre-insertion hole (25).

6. A protective structure for a transmission belt of an electric bicycle according to claim 3, characterized in that: A pair of through holes (23) are arranged at intervals in the extending direction of the synchronous belt (103).

7. A protective structure for a transmission belt of an electric bicycle according to claim 1, characterized in that: The guard plate (3) is in an arc shape that matches the outer shape of the toothed disc (104).

8. The protective structure for the transmission belt of an electric bicycle according to claim 1, characterized in that: The connection between the connection plate (1) and the mounting plate (2), and the connection between the connection plate (1) and the guard plate (3) are both provided with arc chamfers.

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