Connecting mechanism for improving transmission stability of built-in motor of electric motorcycle

Abstract

The utility model belongs to the technical field of stable transmission of middle motors of electric motorcycles, and particularly relates to a connecting mechanism for improving transmission stability of a middle motor of an electric motorcycle, which comprises a transmission rod, and a bottom plate is arranged at the bottom of the transmission rod; the top of the bottom plate is fixedly connected with a fixed block; a movable block is rotationally connected into the fixed block; the side wall of the movable block is fixedly connected with a first gear, and the side wall of the first gear is engaged with a transmission gear. A lifting block is fixedly connected between the two toothed belts; the interior of the lifting block is in threaded connection with a first lead screw. The torque motor is arranged to drive the lifting block, the clamping wheels are made to make contact with the side wall of the transmission rod respectively and extrude the transmission rod, finally the transmission rod is centered, the situation that the transmission rod is eccentric is avoided, the transmission effect of the middle motor of the electric motorcycle is improved, shaking is reduced, and meanwhile working noise is lowered.

Description

A connecting mechanism to improve the transmission stability of a mid-mounted motor in an electric motorcycle Technical Field

[0001] This utility model belongs to the field of stable transmission technology for mid-drive electric motorcycle motors, specifically a connection mechanism for improving the transmission stability of mid-drive electric motorcycle motors. Background Technology

[0002] An electric motor, also known as a motor, is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction. An electric motor typically includes a stator and a rotor. The stator includes a stator core and coil windings wound around the stator core. The rotor includes a shaft and a rotor core fitted around the shaft. The outer edge of the rotor core is provided with permanent magnets.

[0003] Currently, the common output shaft of the mid-drive motor in electric motorcycles adopts a spline structure with fourteen teeth. During power transmission, due to factors such as the machining accuracy of the spline teeth and assembly errors, the motor output shaft and the connecting parts are prone to misalignment. Misalignment will cause severe vibration and noise, which will not only reduce the transmission efficiency of the motor, but also accelerate the wear of the motor and the connecting parts.

[0004] Therefore, this utility model provides a connection mechanism to improve the transmission stability of a mid-mounted motor in an electric motorcycle. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: A connecting mechanism for improving the transmission stability of a mid-mounted motor in an electric motorcycle, comprising a transmission rod, a base plate at the bottom of the transmission rod, a fixed block fixedly connected to the top of the base plate, a movable block rotatably connected inside the fixed block, and two movable blocks being arranged correspondingly; a first gear fixedly connected to the side wall of the movable block, and a transmission gear meshing on the side wall of the first gear; the transmission gear rotatably connected inside the fixed block, and a toothed belt meshing on the side wall of the transmission gear; two A lifting block is fixedly connected between the toothed belts; a first lead screw is internally threaded onto the lifting block, and a torque motor is installed at the bottom of the first lead screw; a clamping cylinder is fixedly connected to the top of the movable block and the lifting block, and a clamping wheel is rotatably connected inside the clamping cylinder; through the above structure, the torque motor drives the lifting block, thereby causing multiple clamping wheels to contact the side wall of the transmission rod respectively, and squeezing the transmission rod, ultimately centering the transmission rod, which helps to avoid the transmission rod from being eccentric, improves the transmission effect of the centrally mounted motor of the electric motorcycle, and reduces shaking and working noise.

[0007] Preferably, a fixed base is provided on the top of the base plate; a fixed frame is fixedly connected to the top of the fixed base; a second lead screw is threadedly connected to the bottom of the fixed base; a threaded cylinder is fixedly connected to the bottom of the base plate; a control knob is rotatably connected inside the threaded cylinder, and the control knob is fixedly connected to the bottom of the second lead screw; a limit rod is fixedly connected to the bottom of the fixed base, and multiple limit rods are correspondingly arranged, and the multiple limit rods are slidably connected to the base plate respectively; through the above structure, the fixed base and fixed frame fix the electric motor in the middle of the motorcycle, thereby preventing it from moving during operation, and the second lead screw, control knob and limit rod adjust the height of the electric motor in the middle of the motorcycle to keep it horizontal, thus enhancing the flexibility of the mechanism.

[0008] Preferably, the side wall of the lifting block is provided with a limiting groove, and the two limiting grooves are arranged correspondingly; the fixed block is internally fixed with a limiting block, and the positions and dimensions of the two limiting blocks corresponding to the limiting grooves are set. Through the above structure, the limiting grooves and limiting blocks restrict the movement posture of the lifting block, thereby preventing it from shaking during movement, which helps to enhance the stability and durability of the mechanism and extend its service life.

[0009] Preferably, fixing pads are fixedly connected to the side walls of the fixing base and the fixing frame, and multiple fixing pads are arranged in a circumferential array; the fixing pads are made of plastic; through the above structure, the fixing pads optimize the contact relationship between the fixing base, the fixing frame and the mid-drive motor of the electric motorcycle, enhance the friction coefficient on the contact surface, and help avoid slippage of the mid-drive motor of the electric motorcycle during operation.

[0010] Preferably, the end of the transmission rod is fixedly connected to a twelve-tooth spline; by using the above structure, replacing the traditional fourteen-tooth spline with a twelve-tooth spline is beneficial to enhance the concentricity between the motor output shaft and the connecting parts, reduce shaking, and improve stability.

[0011] Preferably, a clamping groove is provided on the side wall of the transmission rod, and the clamping groove is set to correspond to the size of the clamping wheel; with the above structure, the clamping groove is provided on the side wall of the transmission rod, so that multiple clamping wheels contact the inside of the clamping groove, which helps to prevent the transmission rod from being displaced during operation.

[0012] Preferably, the movable block, the first gear, the lifting block, the toothed belt, and the transmission gear are made of stainless steel. By using stainless steel for the movable block, the first gear, the lifting block, the toothed belt, and the transmission gear, the structural strength of the mechanism is enhanced, which helps to improve the structural stability of the mechanism and extend its service life.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. The connecting mechanism for improving the transmission stability of a mid-drive electric motor in an electric motorcycle, as described in this utility model, uses a torque motor to drive a lifting block, which causes multiple clamping wheels to contact the side wall of the transmission rod and compress it, ultimately centering the transmission rod. This helps to avoid eccentricity of the transmission rod, improves the transmission effect of the mid-drive electric motor, and reduces shaking and operating noise.

[0015] 2. The connecting mechanism for improving the transmission stability of a mid-mounted electric motor in an electric motorcycle, as described in this utility model, fixes the mid-mounted electric motor with a fixed base and a fixed frame, thereby preventing it from moving during operation. A second lead screw, a control knob, and a limit rod are provided to adjust the height of the mid-mounted electric motor and keep it level, thus enhancing the flexibility of the mechanism. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 is a perspective view of this utility model;

[0018] Figure 2 is a structural schematic diagram of the fixed frame in this utility model;

[0019] Figure 3 is a schematic diagram of the structure of the bottom plate of this utility model;

[0020] Figure 4 is a schematic diagram of the movable block in this utility model;

[0021] Figure 5 is a schematic diagram of the transmission rod in this utility model;

[0022] Figure 6 is a structural schematic diagram of the fixing block in this utility model.

[0023] In the diagram: 1. Transmission rod; 10. Base plate; 11. Fixed block; 12. Movable block; 120. First gear; 13. Clamping cylinder; 14. Clamping wheel; 15. Lifting block; 16. Toothed belt; 17. Torque motor; 18. First lead screw; 19. Transmission gear; 2. Fixed base; 21. Fixed frame; 22. Second lead screw; 23. Control knob; 24. Limiting rod; 25. Threaded cylinder; 3. Limiting groove; 31. Limiting block; 4. Fixed washer; 5. Twelve-tooth spline; 6. Clamping groove. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] Specific implementation examples are given below.

[0026] As shown in Figures 1 to 6, a connecting mechanism for improving the transmission stability of a mid-mounted motor in an electric motorcycle according to an embodiment of this utility model includes a transmission rod 1, with a base plate 10 at the bottom of the transmission rod 1; a fixed block 11 is fixedly connected to the top of the base plate 10; a movable block 12 is rotatably connected inside the fixed block 11, and the two movable blocks 12 are arranged correspondingly; a first gear 120 is fixedly connected to the side wall of the movable block 12, and a transmission gear 19 meshes with the side wall of the first gear 120; the transmission gear 19 is rotatably connected inside the fixed block 11, and the transmission gear 19 is rotatably connected to the side wall of the fixed block 11. A toothed belt 16 is engaged with the wall; a lifting block 15 is fixedly connected between two toothed belts 16; a first lead screw 18 is internally threaded to the lifting block 15, and a torque motor 17 is installed at the bottom of the first lead screw 18; a clamping cylinder 13 is fixedly connected to the top of the movable block 12 and the lifting block 15, and a clamping wheel 14 is rotatably connected inside the clamping cylinder 13; during operation, the operator can place the electric motor in the center of the base plate 10 on top, and first mount the transmission rod 1 on its output end. Then, the operator can drive the torque motor 17 to make multiple rotating parts... The clamping wheel 14, which is connected inside the clamping cylinder 13, contacts the side wall of the transmission rod 1, thereby completing the automatic centering of the transmission rod 1. During the process, whenever the torque motor 17, which is fixed to the bottom of the fixed block 11, is driven, the first lead screw 18, which is fixed to the output end of the torque motor 17, will rotate. At this time, since the first lead screw 18 is meshed with the lifting block 15, the lifting block 15 will move vertically. At this time, since the toothed belt 16, which is fixed to the side wall of the lifting block 15, is meshed with the transmission gear 19, and the transmission gear 19 is also meshed with the toothed belt 16, which is fixed to the side wall of the lifting block 15, the toothed belt 16 is meshed with the transmission gear 19. The first gear 120 on the side wall of the movable block 12 is fixedly connected. As the lifting block 15 moves, the movable block 12 will move synchronously until multiple clamping wheels 14 contact the side wall of the transmission rod 1. Through the above structure, the torque motor 17 drives the lifting block 15, thereby causing multiple clamping wheels 14 to contact the side wall of the transmission rod 1 respectively and squeeze the transmission rod 1, ultimately centering the transmission rod 1. This helps to avoid the transmission rod 1 from being eccentric, improves the transmission effect of the electric motorcycle's central motor, and reduces shaking while reducing working noise.

[0027] As shown in Figures 1 to 3, a fixed base 2 is provided on the top of the base plate 10; a fixed frame 21 is fixedly connected to the top of the fixed base 2; a second lead screw 22 is threadedly connected to the bottom of the fixed base 2; a threaded cylinder 25 is fixedly connected to the bottom of the base plate 10; a control knob 23 is rotatably connected inside the threaded cylinder 25, and the control knob 23 is fixedly connected to the bottom of the second lead screw 22; a limit rod 24 is fixedly connected to the bottom of the fixed base 2, and multiple limit rods 24 are correspondingly arranged, and the multiple limit rods 24 are slidably connected to the base plate 10 respectively; during operation, the second lead screw 22, which is fixedly connected to the control knob 23, is threadedly connected to both the fixed base 2 and the threaded cylinder 25, and the operator can rotate the control knob 23 to... The method involves adjusting the height of the fixed base 2, thereby further adjusting the height of the electric motorcycle's central motor to a predetermined height. During this process, whenever the second lead screw 22 continues to rotate under the drive of the control knob 23, the fixed base 2 will move vertically due to the sliding connection between multiple limit rods 24 and the base plate 10. The fixed frame 21 serves to fix the electric motorcycle's central motor. Through the above structure, the fixed base 2 and the fixed frame 21 fix the electric motorcycle's central motor, thus preventing it from moving during operation. The second lead screw 22, control knob 23, and limit rods 24 adjust the height of the electric motorcycle's central motor, keeping it horizontal and enhancing the flexibility of the mechanism.

[0028] As shown in Figures 4 and 6, a limiting groove 3 is provided on the side wall of the lifting block 15, and the two limiting grooves 3 are arranged correspondingly. A limiting block 31 is fixedly connected inside the fixing block 11, and the two limiting blocks 31 are set in positions and sizes corresponding to the limiting grooves 3. During operation, the limiting block 31 fixed to the inner side wall of the fixing block 11 is always in contact with the inside of the limiting groove 3 provided on the side wall of the lifting block 15. The two can restrict the posture of the lifting block 15 through contact. Through the above structure, the limiting groove 3 and the limiting block 31 restrict the movement posture of the lifting block 15, thereby preventing it from shaking during movement, which helps to enhance the stability and durability of the mechanism and extend its service life.

[0029] As shown in Figure 2, fixing pads 4 are fixedly connected to the side walls of the fixed base 2 and the fixed frame 21, and multiple fixing pads 4 are arranged in a circumferential array. The fixing pads 4 are made of plastic. During operation, the fixing pads 4, which are fixed to the side walls of the fixed base 2 and the fixed frame 21 and are made of plastic, can optimize the contact relationship between the fixed base 2, the fixed frame 21 and the mid-drive motor of the electric motorcycle by means of deformation under force. Through the above structure, the fixing pads 4 optimize the contact relationship between the fixed base 2, the fixed frame 21 and the mid-drive motor of the electric motorcycle, enhance the friction coefficient on the contact surface, and help prevent the mid-drive motor of the electric motorcycle from slipping during operation.

[0030] As shown in Figures 1 and 5, a twelve-tooth spline 5 is fixedly connected to the end of the transmission rod 1. During operation, the twelve-tooth spline 5 is used instead of the traditional fourteen-tooth spline to improve the concentricity of the connection. Through the above structure, the use of the twelve-tooth spline 5 to replace the traditional fourteen-tooth spline is beneficial to enhance the concentricity between the motor output shaft and the connection, reduce shaking, and improve stability.

[0031] As shown in Figure 5, a clamping groove 6 is provided on the side wall of the transmission rod 1, and the clamping groove 6 is set to correspond to the size of the clamping wheel 14. During operation, multiple clamping wheels 14 contact the inside of the clamping groove 6 on the surface of the transmission rod 1. Through the above structure, the clamping groove 6 is provided on the side wall of the transmission rod 1, so that multiple clamping wheels 14 contact the inside of the clamping groove 6, which helps to prevent the transmission rod 1 from being displaced during operation.

[0032] As shown in Figures 1, 2, 3, 4, and 6, the movable block 12, the first gear 120, the lifting block 15, the toothed belt 16, and the transmission gear 19 are made of stainless steel. During operation, the use of stainless steel in these components allows them to leverage the high strength of the material. Therefore, the use of stainless steel in the movable block 12, the first gear 120, the lifting block 15, the toothed belt 16, and the transmission gear 19 enhances their structural strength, improves the structural stability of the mechanism, and extends its service life.

[0033] During operation, the operator can place the electric motor in the center of the base plate 10 on top and first mount the transmission rod 1 onto its output end. Then, by driving the torque motor 17, the operator can cause multiple clamping wheels 14, which are rotatably connected inside the clamping cylinder 13, to contact the side wall of the transmission rod 1, thus achieving automatic centering of the transmission rod 1. During this process, whenever the torque motor 17, fixed to the bottom of the fixed block 11, is driven, the first lead screw 18, fixed to the output end of the torque motor 17, will rotate. At this time, since the first lead screw 18 is engaged with the lifting block 15, the lifting... Block 15 will move vertically. At this time, since the toothed belt 16 fixed to the side wall of the lifting block 15 is meshed with the transmission gear 19, and the transmission gear 19 is fixed to the first gear 120 fixed to the side wall of the movable block 12, the movable block 12 will move synchronously with the movement of the lifting block 15 until multiple clamping wheels 14 contact the side wall of the transmission rod 1. The second lead screw 22, which is fixed to the control knob 23, is simultaneously threaded to the fixed base 2 and the threaded cylinder 25. The operator can adjust the position by rotating the control knob 23. The height of the fixed base 2 is adjusted to further adjust the height of the electric motorcycle's mid-drive motor, thereby adjusting the output of the electric motorcycle's mid-drive motor to a predetermined height. During this process, whenever the second lead screw 22 continues to rotate under the drive of the control knob 23, the fixed base 2 will move vertically due to the sliding connection between the multiple limit rods 24 and the base plate 10. The fixed frame 21 serves to fix the electric motorcycle's mid-drive motor, and the limit block 31 fixed to the inner wall of the fixed block 11 is always in contact with the inside of the limit groove 3 opened on the side wall of the lifting block 15. The two can adjust the lifting by contact. The posture of block 15 is restricted and fixed to the side wall of fixed base 2 and fixed frame 21. The fixed pad 4 made of plastic material can optimize the contact relationship between fixed base 2, fixed frame 21 and electric motor through deformation under force. The twelve-tooth spline 5 is used instead of the traditional fourteen-tooth spline to improve the concentricity of the connection parts. Multiple clamping wheels 14 contact the inside of the clamping groove 6 opened on the surface of transmission rod 1. The movable block 12, first gear 120, lifting block 15, toothed belt 16 and transmission gear 19 made of stainless steel can take advantage of the high strength of stainless steel.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A connecting mechanism for improving the transmission stability of a mid-mounted motor in an electric motorcycle, comprising a transmission rod (1), characterized in that: A base plate (10) is provided at the bottom of the transmission rod (1); a fixed block (11) is fixedly connected to the top of the base plate (10); a movable block (12) is rotatably connected inside the fixed block (11), and the two movable blocks (12) are arranged correspondingly; a first gear (120) is fixedly connected to the side wall of the movable block (12), and a transmission gear (19) meshes with the side wall of the first gear (120); the transmission gear (19) is rotatably connected to the fixed block (11). Inside the transmission gear (19), a toothed belt (16) meshes with the side wall of the transmission gear (19); a lifting block (15) is fixedly connected between the two toothed belts (16); a first lead screw (18) is threadedly connected inside the lifting block (15), and a torque motor (17) is provided at the bottom of the first lead screw (18); a clamping cylinder (13) is fixedly connected to the top of the movable block (12) and the lifting block (15), and a clamping wheel (14) is rotatably connected inside the clamping cylinder (13).

2. The connecting mechanism for improving the transmission stability of a mid-mounted motor in an electric motorcycle according to claim 1, characterized in that: A fixed base (2) is provided on the top of the base plate (10); a fixed frame (21) is fixedly connected to the top of the fixed base (2); a second lead screw (22) is threadedly connected to the bottom of the fixed base (2); a threaded cylinder (25) is fixedly connected to the bottom of the base plate (10); a control knob (23) is rotatably connected inside the threaded cylinder (25), and the control knob (23) is fixedly connected to the bottom of the second lead screw (22); a limit rod (24) is fixedly connected to the bottom of the fixed base (2), and multiple limit rods (24) are arranged in a corresponding manner, and multiple limit rods (24) are slidably connected to the base plate (10).

3. The connecting mechanism for improving the transmission stability of a mid-mounted motor in an electric motorcycle according to claim 1, characterized in that: The lifting block (15) has a limiting groove (3) on its side wall, and the two limiting grooves (3) are arranged in a corresponding manner; the fixing block (11) is fixedly connected to a limiting block (31), and the two limiting blocks (31) are set in the position and size of the limiting groove (3) respectively.

4. The connecting mechanism for improving the transmission stability of a mid-mounted motor in an electric motorcycle according to claim 2, characterized in that: The fixing base (2) and the side wall of the fixing frame (21) are fixed with fixing pads (4), and multiple fixing pads (4) are arranged in a circumferential array; the fixing pads (4) are made of plastic.

5. The connecting mechanism for improving the transmission stability of a mid-mounted motor in an electric motorcycle according to claim 1, characterized in that: The end of the transmission rod (1) is fixed with a twelve-tooth spline (5).

6. The connecting mechanism for improving the transmission stability of a mid-mounted motor in an electric motorcycle according to claim 5, characterized in that: The transmission rod (1) has a clamping groove (6) on its side wall, and the clamping groove (6) is set to correspond to the size of the clamping wheel (14).

7. The connecting mechanism for improving the transmission stability of a mid-mounted motor in an electric motorcycle according to claim 1, characterized in that: The movable block (12), the first gear (120), the lifting block (15), the toothed belt (16), and the transmission gear (19) are made of stainless steel.

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