Auxiliary wheel device for electric vehicle

Abstract

The utility model relates to the technical field of vehicle auxiliary wheels, in particular to an auxiliary wheel device for an electric vehicle, which comprises a fixing frame, two main shells are symmetrically fixed on two sides of the fixing frame, a shell cover is fixed on one side, far away from the fixing frame, of each main shell through a bolt, and a driving mechanism is mounted in each main shell. A fixing disc is installed at the power output end of the driving mechanism, a folding arm assembly is fixed to the outer wall of the fixing disc, and the driving mechanism comprises a first rotating shaft and a second rotating shaft which are rotationally installed in the main shell. The device has the advantages that the driving mechanism drives the folding arm assembly to stretch out and draw back through meshing of large and small gears, and the service life is long; a main shell is arranged outside the driving mechanism, the driving mechanism can be prevented from making contact with dust and muddy water, foreign matter is prevented from affecting transmission, the transmission stability is guaranteed, and meanwhile the service life is prolonged; the acting force borne by the folding arm assembly is transmitted to the main shell through the second rotating shaft, stress dispersion is achieved, and deformation and damage are not prone to occurring.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle auxiliary wheel technology field especially is involved in a kind of auxiliary wheel device for electric vehicle. BACKGROUND

[0002] Two-wheeled electric vehicle, motorcycle is the traffic tool that people commonly used, when speed is low or vehicle body is inclined, it is difficult to keep balance, and it is easy to cause security risk, to the personal safety of people brings threat.

[0003] The Chinese patent with application No.CN202311359145.6 discloses an auxiliary wheel device for motorcycle, which comprises a flat fork clamping piece, left and right support arms symmetrically arranged on the rear flat fork; a folding arm assembly comprising a shaft-connected upper support arm and a lower support arm, the upper support arm is rotatably connected with the flat fork clamping piece, and the lower support arm is connected with a roller; further comprising a lower support arm pull rod, one end of which is connected with a lower support arm shaft connecting column arranged on the inner side of the lower support arm, and the rotating end of the pull rod is movably connected with the flat fork clamping piece; the folding drive mechanism comprises a worm gear reducer and a transmission gear rod, the transmission gear rod comprises a transmission rod and a gear rod connected with each other, and the transmission rod is connected with the rotating end of the upper support arm. In the above-mentioned patent, the worm drives the gear rod to rotate, and the gear rod drives the upper support arm to rotate. This transmission mode causes the stress of the roller to be directly transmitted to the gear rod, which may cause the gear rod to be bent and deformed when the roller is under excessive stress during driving, affecting the transmission with the worm. Moreover, the gear rod is exposed, which is prone to scratching, bumping, and sticking dust, soil and other substances, affecting the stability and service life of the transmission. SUMMARY

[0004] The utility model discloses an auxiliary wheel device for electric vehicle to solve the above-mentioned problem.

[0005] The technical scheme of the utility model is as follows:

[0006] An auxiliary wheel device for electric vehicle, comprising a fixing frame, two main housings are symmetrically fixed on both sides of the fixing frame, a shell cover is fixed on the side of the main housing away from the fixing frame through bolts, a driving mechanism is installed in the main housing, a fixed disc is installed on the power output end of the driving mechanism, a folding arm assembly is fixed on the outer wall of the fixed disc, the driving mechanism comprises a first rotating shaft and a second rotating shaft rotatably installed in the main housing, the first rotating shaft and the second rotating shaft are arranged in parallel, a worm wheel is fixed on one end of the first rotating shaft, a pinion is fixed on the other end of the first rotating shaft, a driving motor is fixed on the outer wall of the main housing through bolts, a worm is fixed on the power shaft of the driving motor and engages with the worm wheel for transmission, a large gear is fixed on the second rotating shaft and engages with the pinion for transmission, and the fixed disc is fixed on the outer end of the second rotating shaft.

[0007] Further, the folding arm assembly comprises an upper supporting arm and a lower supporting arm connected with each other through a shaft, one end of the upper supporting arm away from the lower supporting arm is detachably connected with the fixing disc, and a supporting wheel is rotatably installed at the bottom end of the lower supporting arm.

[0008] Further, a sealing ring is installed between the main shell and the shell cover.

[0009] Further, the fixing frame is U-shaped, and a cable protection cover is fixed to the inner wall of the fixing frame.

[0010] Further, a microprocessor and a gyroscope are further fixed below the seat, the gyroscope is electrically connected with the microprocessor, and the microprocessor is electrically connected with the two driving mechanisms.

[0011] Further, a wheel speed sensor for detecting the rotating speed of the vehicle wheel and an acceleration sensor for detecting the moving state of the vehicle are further included, and the acceleration sensor and the wheel speed sensor are electrically connected with the microprocessor.

[0012] Further, a manual control switch electrically connected with the microprocessor is further included, and the manual control switch is fixed on the handle of the vehicle.

[0013] Further, the rotating speed ratio of the first rotating shaft to the second rotating shaft is (3-5):1.

[0014] By adopting the above technical scheme, the driving mechanism utilizes two gears to realize transmission driving of the folding arm assembly, and the practical service life is long; the main shell is arranged outside the driving mechanism, so that the driving mechanism can avoid contacting dust and mud, foreign matters can be avoided from affecting transmission, the stability of transmission is ensured, and the service life is prolonged; the force received by the folding arm assembly is transmitted to the main shell through the second rotating shaft, force dispersion is realized, and deformation and damage are not easy to occur. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0016] Figure 1 is the front view of the present application;

[0017] Figure 2 is the side view of the present application;

[0018] Figure 3 is a perspective view of the utility model;

[0019] Figure 4 is a drive mechanism structure schematic view of the utility model;

[0020] Figure 5 is a circuit structure block diagram of the utility model.

[0021] The sign of the drawing is explained as follows:

[0022] 1, fixed frame; 2, cable protection cover; 3, main casing; 4, casing cover; 5, drive mechanism; 51, drive motor; 52, first rotating shaft; 53, second rotating shaft; 54, worm wheel; 55, worm; 56, pinion; 57, gear; 6, fixed disc; 7, folding arm assembly; 71, upper support arm; 72, lower support arm; 73, support wheel; 74, connecting rod; 8, microprocessor; 9, gyroscope; 10, acceleration sensor; 11, wheel speed sensor; 12, manual control switch. DETAILED DESCRIPTION

[0023] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0024] As Figures 1-5As shown, an auxiliary wheel device for electric vehicles, comprising a fixed frame 1, two main housings 3 are symmetrically fixed on both sides of the fixed frame 1, a shell cover 4 is fixed on the side away from the fixed frame 1 of the main housing 3 through bolts, a driving mechanism 5 is installed in the main housing 3, the driving mechanism 5 comprises a first rotating shaft 52 and a second rotating shaft 53 rotatably installed in the main housing 3, the first rotating shaft 52 and the second rotating shaft 53 are arranged in parallel and the two ends are fixed through bearings, the first rotating shaft 52 is fixed with a worm gear 54 at one end, the first rotating shaft 52 is fixed with a pinion 56 at the other end, a driving motor 51 is fixed on the outer wall of the main housing 3 through bolts, a worm 55 engaged with the worm gear 54 is fixed on the power shaft of the driving motor 51, a large gear 57 engaged with the pinion 56 is fixed on the second rotating shaft 53, the main housing 3 and the shell cover 4 can be used to protect the driving mechanism 5, avoid the transmission parts in the driving mechanism 5 from being damaged or touched by foreign matter, improve the protection effect of the transmission parts, ensure the stability of the transmission, and the large gear 57 and the pinion 56 are engaged in transmission, which is more stable and has a longer service life, the speed ratio of the first rotating shaft 52 to the second rotating shaft 53 is (3-5):1, which can realize speed reduction transmission and ensure that the folding arm assembly 7 is folded or unfolded at low speed, the fixed disc 6 is fixed on the outer end of the second rotating shaft 53, the folding arm assembly 7 is fixed on the outer wall of the fixed disc 6, the folding arm assembly 7 comprises upper and lower arms 71 and 72 connected by shafts, one end of the upper arm 71 away from the lower arm 72 is connected with the fixed disc 6 through a detachable connection, the bottom end of the lower arm 72 is rotatably installed with a support wheel 73, and a connecting rod 74 is further included, one end of the connecting rod 74 is fixed in the middle of the lower arm 72 through a pin shaft, and the other end of the connecting rod 74 is rotatably installed on the shell cover 4.

[0025] In this embodiment, in order to improve the sealing effect, a sealing ring is installed between the main housing 3 and the shell cover 4, which can prevent water from entering the main housing 3 and prolong the service life of the driving mechanism 5.

[0026] In this embodiment, the fixed frame 1 is U-shaped, and a cable protection cover 2 is fixed on the inner wall of the fixed frame 1, which can protect the cable connecting the two driving mechanisms 5 and facilitate the hidden installation of the cable.

[0027] The microprocessor 8 is fixed below the seat, and the microprocessor 8 is an 80c51 single-chip microcomputer, the gyroscope 9 is electrically connected with the microprocessor 8, the microprocessor 8 is electrically connected with the two driving mechanisms 5, the speed sensor 11 for detecting the rotating speed of the wheels of the vehicle and the acceleration sensor 10 for detecting the moving state of the vehicle are further included and electrically connected with the microprocessor 8, and the manual control switch 12 electrically connected with the microprocessor 8 is fixed on the handle of the vehicle, the gyroscope 9 can detect whether the vehicle frame is in a horizontal state, the speed sensor 11 is used for detecting the rotating speed of the wheels of the electric vehicle, the acceleration sensor 10 is used for detecting whether the vehicle is in a moving state and the moving speed, the microprocessor 8 will not control the folding arm assembly 7 to be unfolded to avoid danger when the vehicle is in a high-speed moving state, and the manual control switch 12 can be used for manually controlling the folding arm assembly 7 to be unfolded or folded when the vehicle is in a low-speed moving state or a stopping state.

[0028] The working principle of the utility model is as follows: in use, the gyroscope 9 detects whether the vehicle is in a balanced state, the speed sensor 11 and the acceleration sensor 10 detect the moving state of the vehicle and the moving speed of the vehicle, when the vehicle is in a moving state and moves at a low speed or is in a static state, the speed of the wheels is zero, if the gyroscope 9 detects that the frame is inclined, the microprocessor 8 controls the driving mechanism 5 to start to drive the folding arm assembly 7 on the lower side of the frame to be elongated, so that the vehicle gradually keeps in a horizontal state, and the vehicle is prevented from being inclined, when the vehicle is in a high-speed moving state, the microprocessor 8 does not respond and does not send a signal to control the driving mechanism 5 to work.

[0029] The components not described in detail in the text are prior art.

[0030] The above only describes preferred embodiments of the utility model and is not used to limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An auxiliary wheel device for an electric vehicle, comprising a mounting frame (1), characterized in that: Two main housings (3) are symmetrically fixed on both sides of the fixing frame (1). A cover (4) is fixed to the side of the main housing (3) away from the fixing frame (1) by bolts. A drive mechanism (5) is installed inside the main housing (3). A fixed plate (6) is installed at the power output end of the drive mechanism (5). A folding arm assembly (7) is fixed on the outer wall of the fixed plate (6). The drive mechanism (5) includes a first rotating shaft (52) and a second rotating shaft (53) rotatably installed inside the main housing (3). The first rotating shaft (52) and the second rotating shaft (53) are rotatably installed inside the main housing (3). Two rotating shafts (53) are arranged in parallel. One end of the first rotating shaft (52) is fixed with a worm gear (54), and the other end of the first rotating shaft (52) is fixed with a small gear (56). A drive motor (51) is fixed to the outer wall of the main housing (3) by bolts. A worm (55) that meshes with the worm gear (54) is fixed on the power shaft of the drive motor (51). A large gear (57) that meshes with the small gear (56) is fixed on the second rotating shaft (53). The fixed disk (6) is fixed to the outer end of the second rotating shaft (53).

2. The auxiliary wheel device for an electric vehicle according to claim 1, characterized in that: The folding arm assembly (7) includes an upper support arm (71) and a lower support arm (72) connected to each other by a shaft. The end of the upper support arm (71) away from the lower support arm (72) is detachably connected to the fixed plate (6). The bottom end of the lower support arm (72) is rotatably mounted with a support wheel (73). It also includes a connecting rod (74). One end of the connecting rod (74) is fixed to the middle of the lower support arm (72) by a pin. The other end of the connecting rod (74) is rotatably mounted on the cover (4).

3. The auxiliary wheel device for an electric vehicle according to claim 1, characterized in that: A sealing ring is installed between the main housing (3) and the cover (4).

4. The auxiliary wheel device for an electric vehicle according to claim 1, characterized in that: The fixing frame (1) is U-shaped, and a cable protection cover (2) is fixed on the inner wall of the fixing frame (1).

5. The auxiliary wheel device for an electric vehicle according to claim 1, characterized in that: It also includes a microprocessor (8) and a gyroscope (9) fixed under the seat, the gyroscope (9) being electrically connected to the microprocessor (8), and the microprocessor (8) being electrically connected to two drive mechanisms (5).

6. The auxiliary wheel device for an electric vehicle according to claim 5, characterized in that: It also includes a wheel speed sensor (11) for detecting the rotational speed of the vehicle wheels and an acceleration sensor (10) for detecting the vehicle's movement state. The acceleration sensor (10) and the wheel speed sensor (11) are electrically connected to the microprocessor (8).

7. The auxiliary wheel device for an electric vehicle according to claim 5, characterized in that: It also includes a manual control switch (12) electrically connected to the microprocessor (8), the manual control switch (12) being fixed to the vehicle handlebars.

8. The auxiliary wheel device for an electric vehicle according to claim 1, characterized in that: The rotational speed ratio between the first rotating shaft (52) and the second rotating shaft (53) is (3-5):1.

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