Motor chain anti-falling device for electric bicycle

Abstract

The utility model discloses a motor chain anti-dropping device for an electric bicycle, and particularly relates to the field of anti-dropping devices, the motor chain anti-dropping device comprises a supporting frame, a stabilizing frame is fixedly arranged on the supporting frame, an anti-dropping area is arranged between the supporting frame and the stabilizing frame, a first gear is rotatably arranged on the supporting frame, and the first gear is located in the anti-dropping area; and a tensioning adjusting mechanism is arranged in the anti-disengaging area and comprises a moving seat, the moving seat is arranged in the anti-disengaging area in a sliding mode, a second gear is rotationally arranged on the moving seat, and an elastic piece is arranged between the moving seat and the stabilizing frame. By arranging the tensioning adjusting mechanism, the motor chain is located in the anti-falling area, the motor chain can be limited in the horizontal direction, the chain and the transmission chain wheel can be always in a tightened state through movement of the second gear under the action of the elastic force of the elastic piece, the matching precision between the transmission chain wheel and the chain is improved, and the service life of the transmission chain wheel is prolonged. And the transmission efficiency is not influenced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a prevent device technical field, more specifically, the utility model relates to a kind of motor chain prevent device for electric bicycle. BACKGROUND

[0002] The motor chain of electric bicycle is an important component in transmission system, which plays a role of connecting motor and rear wheel (or front wheel, depending on vehicle design). In order to avoid the chain from falling off the transmission sprocket, the prior art will install a chain anti-drop device on the electric bicycle. The chain anti-drop device is used to limit the chain in the horizontal direction to ensure that the chain is always correctly engaged with the teeth of the transmission sprocket.

[0003] With the increase of the use time of the motor chain of electric bicycle, the chain will be worn and stretched to some extent, and the length of the chain will gradually increase. However, the anti-drop device in the prior art is not conducive to automatically adjusting the tension between the chain and the transmission sprocket, which leads to a decrease in the matching precision between the transmission sprocket and the chain, an increase in energy loss during power transmission, a decrease in transmission efficiency, and an unsatisfactory use effect. SUMMARY

[0004] The utility model provides a kind of motor chain prevent device for electric bicycle, the problem to be solved is that the existing motor chain prevent device for electric bicycle is not conducive to automatically adjusting the tension between the chain and the transmission sprocket, which leads to a decrease in the matching precision between the transmission sprocket and the chain, an increase in energy loss during power transmission, a decrease in transmission efficiency, and an unsatisfactory use effect.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of motor chain prevent device for electric bicycle, including support frame, support frame is fixedly provided with stabilizing frame, support frame and stabilizing frame are anti-drop area, support frame is rotatably provided with gear one in anti-drop area;

[0006] Tensioning adjusting mechanism is arranged in anti-drop area, and the tensioning adjusting mechanism includes a moving seat, the moving seat is slidably arranged in the anti-drop area, the gear two is rotatably arranged on the moving seat, and the elastic member is arranged between the moving seat and the stabilizing frame.

[0007] In one preferred embodiment, the support frame is provided with a positioning mechanism, the positioning mechanism includes a fixed shaft, the fixed shaft is movably arranged with the support frame, the rotating seat is rotatably arranged on the support frame, and the rotating seat is clamped with the fixed shaft.

[0008] In one preferred embodiment, the support frame is fixedly provided with a limiting seat, the limiting seat is matched with the rotating seat, and the same bolt is threadedly connected on the rotating seat and the limiting seat.

[0009] In a preferred embodiment, the support frame and the stabilizing frame are both provided with a through hole and a guide slot, and the moving seat is slidingly arranged in the through hole and slidingly arranged with the guide slot.

[0010] In a preferred embodiment, the stabilizing frame and the moving seat are both fixedly provided with a support seat, and the elastic member is located between the two corresponding support seats.

[0011] In a preferred embodiment, the support frame and the stabilizing frame are both fixedly provided with a shielding seat, and the shielding seat is located in the anti-disengagement area.

[0012] The utility model discloses the beneficial effect lies in:

[0013] 1. The utility model discloses a tensioning adjusting mechanism is set up, and the motor chain is located in the anti-disengagement area not only can be limited to the horizontal direction to the motor chain, can also be under the action of the elasticity of elastic member and make the chain and the transmission sprocket always be in the tight state through the movement of gear no.

[0014] 2. The utility model discloses a positioning mechanism is set up, and when installing, the rotating seat is clamped with the fixed shaft, then the rotating seat and the limiting seat are fixed, convenient for the installation and dismounting of support frame, improved operating efficiency. DRAWINGS

[0015] Figure 1 It is the three-dimensional structure schematic view of the support frame of the utility model.

[0016] Figure 2 It is the structure schematic view of the support frame main view of the utility model.

[0017] Figure 3 It is the three-dimensional structure schematic view of the elastic member of the utility model.

[0018] Figure 4 It is the three-dimensional structure schematic view of the stabilizing frame of the utility model.

[0019] The drawing mark is: 1, support frame, 2, stabilizing frame, 21, through hole, 22, guide slot, 3, gear no. PREFERRED EMBODIMENT

[0020] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0021] Refer to the instruction manual appendix Figures 1 to 4 A chain anti-derailment device for an electric bicycle includes a support frame 1, a stabilizer 2 fixedly mounted on the support frame 1, and an anti-derailment zone between the support frame 1 and the stabilizer 2. A gear 3 is rotatably mounted on the support frame 1 and located within the anti-derailment zone. A tension adjustment mechanism 4 is provided within the anti-derailment zone. The tension adjustment mechanism 4 includes a movable seat 41, which is slidably mounted in the anti-derailment zone. A gear 42 is rotatably mounted on the movable seat 41. An elastic element 43 is provided between the movable seat 41 and the stabilizer 2.

[0022] It should be noted that the elastic element 43 is a spring, and the spring is located between the stabilizer 2 and the movable seat 41.

[0023] The specific implementation scenario is as follows: The support frame 1 is installed on an electric bicycle, referring to... Figure 2 The motor chain of an electric bicycle, such as Figure 2 The state shown is wound around gear 3 and gear 42. The motor chain is located in the anti-detachment zone between the support frame 1 and the stabilizer 2. The anti-detachment zone can limit the motor chain in the horizontal direction. By setting gear 42 and elastic element 43, which are slidably set in the anti-detachment zone, the length of the motor chain can be increased due to long-term use. Under the action of the elastic element 43, the moving seat 41 will also move along the length direction of the stabilizer 2, thereby driving gear 42 to move. Under the action of the elastic element 43, it can be ensured that the motor chain and the transmission sprocket are always in a taut state. Compared with the prior art, it can not only limit the chain in the horizontal direction, but also adaptively adjust according to the length of the motor chain, ensuring that the motor chain and the transmission sprocket are always in a taut state, improving the matching accuracy between the transmission sprocket and the chain, and ensuring that the transmission sprocket and the chain are always in the best transmission efficiency.

[0024] Unlike the above-mentioned technical solution that uses an elastic element 43 to adaptively adjust the tension between the transmission sprocket and the chain, a lead screw is rotatably mounted on the stabilizer 2, and the lead screw is threadedly connected to the moving seat 41. The threaded connection between the lead screw and the moving seat 41 replaces the elastic element 43. After long-term use, the chain length increases, and the efficiency between the chain and the transmission sprocket is lower when the user uses the electric bicycle. The user can feel that the acceleration is not as powerful as before. The user can manually drive the lead screw to rotate, and through the threaded connection, drive the moving seat 41 to move actively, thereby adjusting the tension between the chain and the transmission sprocket.

[0025] With reference to the description accompanying drawings Figures 1 to 4 The motor chain of the electric bicycle needs to be maintained and replaced after long-term use. In order to improve the maintenance efficiency, the support frame 1 is convenient to disassemble and install. Specifically, the support frame 1 is provided with a positioning mechanism 6, the positioning mechanism 6 comprises a fixed shaft 61, the fixed shaft 61 is movably arranged on the support frame 1, a rotating seat 62 is rotatably arranged on the support frame 1, and the rotating seat 62 is clamped with the fixed shaft 61. A limiting seat 63 is fixedly arranged on the support frame 1, the limiting seat 63 is matched with the rotating seat 62, and the same bolt is threadedly connected between the rotating seat 62 and the limiting seat 63.

[0026] It should be noted that the number of fixed shafts 61 is two, two holes are formed on the electric bicycle, and the fixed shafts 61 are fixedly arranged in the holes. The arc surfaces of the two fixed shafts 61 are provided with clamping grooves, and the rotating seat 62 is clamped with the clamping grooves.

[0027] It should be further noted that after the chain is wound around the gear two 42 and the gear one 3, the support frame 1 needs to be installed on the electric bicycle. First, the support frame 1 is sleeved on the two fixed shafts 61, then the rotating seat 62 is rotated to make the rotating seat 62 clamped with the clamping groove, at this time the rotating seat 62 is in close contact with the limiting seat 63, and then the same bolt is used to threadedly connect between the limiting seat 63 and the rotating seat 62.

[0028] With reference to the description accompanying drawings Figures 1 to 4 When the gear two 42 is self-adaptively adjusted in position according to the length of the chain, specifically, the support frame 1 and the stabilizing frame 2 are provided with through holes 21 and guide grooves 22, the moving seat 41 is slidably arranged in the through hole 21, and the moving seat 41 is slidably arranged in the guide groove 22. The stabilizing frame 2 and the moving seat 41 are fixedly provided with support seats, and the elastic member 43 is located between the corresponding two support seats.

[0029] It should be noted that the through hole 21 and the guide groove 22 have a guiding effect on the movement of the moving seat 41, and the support seat can stably support the elastic member 43.

[0030] With reference to the description accompanying drawings Figures 1 to 4 The support frame 1 and the stabilizing frame 2 are fixedly provided with a shielding seat 5, and the shielding seat 5 is located in the anti-falling area.

[0031] It should be noted that the shielding seat 5 can support the motor chain when the motor chain is replaced, so as to avoid the angle deflection of the motor chain.

[0032] The above embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but can not therefore be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled person in the art, without departing from the utility model concept, several deformations and improvements can be made, which belong to the protection range of the utility model.

Claims

1. A motor chain anti-drop device for an electric bicycle, characterized in that, Including support frame (1), the support frame (1) is fixedly provided with stabilizing frame (2), and the support frame (1) and stabilizing frame (2) are anti-disengagement area, the support frame (1) is rotatably provided with gear one (3), and the gear one (3) is located in the anti-disengagement area; The anti-disengagement area is provided with a tensioning adjusting mechanism (4), the tensioning adjusting mechanism (4) includes a moving seat (41), the moving seat (41) is slidably arranged in the anti-disengagement area, the moving seat (41) is rotatably provided with gear two (42), and the moving seat (41) and the stabilizing frame (2) are provided with an elastic member (43).

2. The electric motor chain anti-drop device for an electric bicycle according to claim 1, characterized in that: The support frame (1) is provided with a positioning mechanism (6), the positioning mechanism (6) includes a fixed shaft (61), the fixed shaft (61) is movably arranged with the support frame (1), the support frame (1) is rotatably provided with a rotating seat (62), and the rotating seat (62) is clamped with the fixed shaft (61).

3. The electric motor chain anti-drop device for an electric bicycle according to claim 2, characterized in that: The support frame (1) is fixedly provided with a limiting seat (63), the limiting seat (63) is matched with the rotating seat (62), and the rotating seat (62) and the limiting seat (63) are threadedly connected with the same bolt.

4. The electric motor chain anti-off device for electric bicycle according to claim 3, characterized in that: The support frame (1) and stabilizing frame (2) are provided with through holes (21) and guide grooves (22), the moving seat (41) is slidably arranged in the through hole (21), and the moving seat (41) is slidably arranged with the guide groove (22).

5. The electric motor chain anti-drop device for an electric bicycle according to claim 4, characterized in that: The stabilizing frame (2) and the moving seat (41) are fixedly provided with support seats, and the elastic member (43) is located between the two corresponding support seats.

6. The electric motor chain anti-drop device for an electric bicycle according to claim 5, characterized in that: The support frame (1) and stabilizing frame (2) are fixedly provided with shielding seats (5), and the shielding seats (5) are located in the anti-disengagement area.

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