Electric power-assisted wheel

Abstract

The utility model provides an electric power-assisted wheel. The electric power-assisted wheel comprises a mounting frame, a hub with a built-in speed reducer, a roller driving motor and a spring device, the mounting frame comprises a fixing plate, a first supporting plate, a second supporting plate and a supporting shaft, the fixing plate is used for being fixedly connected with a heavy-load trolley frame, the first supporting plate and the second supporting plate are hinged to the bottom of the fixing plate at intervals, and the supporting shaft is connected between the first supporting plate and the second supporting plate and used for supporting a hub; the hub is rotationally connected to the supporting shaft and located between the first supporting plate and the second supporting plate. A machine base of the roller driving motor is fixedly installed on the first supporting plate, and an output shaft of the roller driving motor is in transmission connection with the hub. And the spring device is mounted on the mounting frame. According to the heavy-load trolley using the power-assisted wheel, the friction force of the hub on the ground is ensured, the power is sufficient, the vibration of the heavy-load trolley is reduced, and the use comfort of the heavy-load trolley is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to handcart equipment technical field, specifically, relate to a kind of electric power wheel. BACKGROUND

[0002] Handcart is with manpower push, pull the carrying vehicle, it is the ancestor of all vehicles. Although handcart material handling technology is continuously developed, but handcart still as indispensable carrying tool and along with. Handcart obtains wide application in production and life because it is low in cost, maintenance is simple, easy to operate, light in weight, can work in the place where motor vehicle is inconvenient to use, when short-distance carrying lighter goods is very convenient. When carrying heavy load, heavy load handcart workshop worker's labor intensity is big, work efficiency is low, and the problems such as poor safety factor. In order to improve transportation efficiency and convenience, electric drive equipment is generally arranged on handcart with heavy load. However, the electric drive heavy load handcart on the market is generally single motor drive multiple wheels, there are power shortage, low energy utilization rate, insufficient endurance mileage, difficult control and safety problems, and the shock-absorbing effect on uneven road surface is poor. SUMMARY

[0003] The technical problem to be solved by the utility model is power shortage of electric heavy load handcart and poor shock-absorbing effect on uneven road surface, in order to overcome the defects of above prior art, the utility model provides a kind of electric power wheel.

[0004] The utility model provides a kind of electric power wheel, including mounting bracket, built-in speed reducer's wheel hub, gyro wheel drive motor and spring device;The mounting bracket includes fixed plate, first support plate, second support plate and support shaft, the fixed plate is used to fixedly connected heavy load handcart frame, the first support plate and second support plate are hingedly connected in the bottom of fixed plate, the support shaft is connected between the first support plate and second support plate and is used to support wheel hub;The wheel hub is rotatably connected on support shaft and between the first support plate and second support plate;The base of gyro wheel drive motor is fixedly installed on first support plate, and the output shaft of gyro wheel drive motor is drivingly connected with wheel hub;The spring device is installed on mounting bracket for buffering the walking vibration of wheel hub and ensuring the friction force of wheel hub on ground.

[0005] Compared with the prior art, the electric power-assisted wheel has the following advantages: the mounting frame is arranged, the fixing plate is used for fixedly connecting the heavy-duty handcart frame, the first supporting plate, the second supporting plate and the supporting shaft provide reliable support for the wheel hub, the roller driving motor is installed on the first supporting plate to provide power driving for the wheel hub, that is, each wheel hub on the heavy-duty handcart frame has a power source, sufficient power is provided for the heavy-duty handcart, the spring device is arranged on the mounting frame to ensure the friction force of the wheel hub on the ground and provide effective buffering for the walking vibration of the wheel hub, so that the heavy-duty handcart is reduced in vibration and the use comfort of the heavy-duty handcart is improved.

[0006] In a possible implementation, a transmission mechanism is arranged between the output shaft of the roller driving motor and the wheel hub, the transmission mechanism comprises a driving pulley, a driven pulley, a synchronous belt and a rotating output ring, the driving pulley is fixedly connected with the output shaft of the roller driving motor, the driven pulley is fixedly connected with the rotating output ring, the rotating output ring is coaxially and rotatably connected with the supporting shaft and rotatably matched with the wheel hub, and the synchronous belt is wound between the driving pulley and the driven pulley.

[0007] Compared with the prior art, the above technical solution can drive the rotating output ring to rotate by the output shaft of the roller driving motor, so that the rotation of the wheel hub is realized, and the transmission connection is stable and reliable.

[0008] In a possible implementation, the speed reducer comprises a planet carrier, three planetary gears, a sun gear and an output gear ring, the planet carrier is fixedly connected with the supporting shaft, the three planetary gears are rotatably connected with the planet carrier and are uniformly distributed in the circumferential direction, the sun gear is coaxially and fixedly connected with the rotating output ring and is in meshing transmission with the three planetary gears, the sun gear is arranged on the inner side of the three planetary gears, and the output gear ring is coaxially and fixedly connected with the wheel hub and is in meshing transmission with the three planetary gears, the output gear ring is arranged on the outer side of the three planetary gears.

[0009] Compared with the prior art, the above technical solution can reduce the rotation speed of the wheel hub, enhance the rotation torque, improve the output power, and realize stable and reliable gear speed reduction.

[0010] In a possible implementation, the spring device comprises a first shock-absorbing cylinder and a second shock-absorbing cylinder, the base of the first shock-absorbing cylinder is hingedly connected with the first supporting plate, the telescopic rod of the first shock-absorbing cylinder is hingedly connected with the fixing plate, the base of the second shock-absorbing cylinder is hingedly connected with the second supporting plate, and the telescopic rod of the second shock-absorbing cylinder is hingedly connected with the fixing plate.

[0011] Compared with the prior art, the above technical scheme can make the support plate rotate around the fixed plate, has a damping effect, buffers the walking vibration of the hub, ensures the adhesion of the hub to the ground, and has a large enough friction force to ensure the assistance of the heavy-duty trolley.

[0012] In a possible implementation, the spring device further comprises a first damping spring and a second damping spring, the first damping spring is coaxially sleeved on the first damping cylinder, one end of the first damping spring is connected with the base of the first damping cylinder, and the other end of the first damping spring is connected with the telescopic rod of the first damping cylinder; the second damping spring is coaxially sleeved on the second damping cylinder, one end of the second damping spring is connected with the base of the second damping cylinder, and the other end of the second damping spring is connected with the telescopic rod of the second damping cylinder.

[0013] Compared with the prior art, the above technical scheme can further improve the damping effect, and conveniently adjust the length and position of the spring, so that the heavy-duty trolley of different heights can be adapted.

[0014] In a possible implementation, the two ends of the support shaft are detachably connected with the first support plate and the second support plate respectively.

[0015] Compared with the prior art, the above technical scheme can detach the support shaft from between the first support plate and the second support plate, and facilitate the disassembly and assembly of the hub.

[0016] In a possible implementation, the hub is made of a skid-resistant and wear-resistant material.

[0017] Compared with the prior art, the above technical scheme can improve the skid resistance and wear resistance of the hub.

[0018] In a possible implementation, the roller driving motor is electrically connected with a control system adopting a no-torque sensor adaptive model resistance control strategy.

[0019] The above technical scheme has the following advantages:

[0020] Low cost: by establishing a precise force evaluation estimator model to estimate the intelligent assistance output in real time, the use of expensive torque sensors is saved. An embedded control system is used to compress control costs.

[0021] Safety of assistance: using more advanced control chips and optimized control parameters to ensure the stability and safety of assistance, and building a perfect intelligent assistance guarantee system. The sensor monitors the motion state of the intelligent assistance equipment in real time, and alarms and stops in time to effectively avoid danger.

[0022] Naturalization of human-computer interaction: through the use of various sensors and control algorithm analysis, the intelligent power-assisted device can better understand the user's operation intention. The user and the intelligent power-assisted device can also realize more sufficient two-way communication and communication through various human-computer interaction interfaces.

[0023] Strong adaptive capacity: the powerless sensor adaptive model impedance power-assisted control strategy adopts a modular design, has certain openness, and is easy to modify, reconfigure and extend. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 Structure diagram of the utility model Figure One ;

[0025] Figure 2 Structure diagram of the utility model Figure Two ;

[0026] Figure 3 Structure diagram of the utility model Figure Three (Hide the first support plate)

[0027] Figure 4 Part of the utility model Figure One ;

[0028] Figure 5 Part of the utility model Figure Two ;

[0029] BRIEF DESCRIPTION OF DRAWINGS

[0030] 1, mounting frame; 11, fixed plate; 12, first support plate; 13, second support plate; 14, support shaft; 2, hub; 3, roller drive motor; 4, spring device; 41, first shock absorbing cylinder; 42, second shock absorbing cylinder; 43, first shock absorbing spring; 44, second shock absorbing spring; 5, transmission mechanism; 51, driving pulley; 52, driven pulley; 53, synchronous belt; 54, rotary output ring; 6, speed reducer; 61, planet carrier; 62, planetary gear; 63, sun gear; 64, output gear ring. DETAILED DESCRIPTION

[0031] Firstly, those skilled in the art should understand that these embodiments are only used to explain the technical principles of the embodiments of the application, and are not intended to limit the protection scope of the embodiments of the application. Those skilled in the art can adjust them as needed in order to adapt to specific application occasions.

[0032] In the description of the embodiments of the present application, it should be noted that unless specifically defined and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0033] In the embodiments of the present application, unless specifically defined and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be the first feature directly above or obliquely above the second feature, or it can only mean that the first feature is higher than the second feature in horizontal height. The first feature "below", "below" and "below" the second feature can be the first feature directly below or obliquely below the second feature, or it can only mean that the first feature is lower than the second feature in horizontal height.

[0034] The present application will be further described in detail below in conjunction with the drawings and specific embodiments.

[0035] Referring to Figures 1 to 5 , the present application discloses an electric power-assisted wheel, comprising a mounting frame 1, an internal reducer 6 wheel hub 2, a roller drive motor 3 and a spring device 4; the mounting frame 1 comprises a fixed plate 11, a first support plate 12, a second support plate 13 and a support shaft 14, the fixed plate 11 is used for fixedly connecting the heavy-duty cart frame, the first support plate 12 and the second support plate 13 are hingedly connected at the bottom of the fixed plate 11, and the support shaft 14 is connected between the first support plate 12 and the second support plate 13 and is used for supporting the wheel hub 2; the wheel hub 2 is rotatably connected to the support shaft 14 and located between the first support plate 12 and the second support plate 13; the base of the roller drive motor 3 is fixedly installed on the first support plate 12, and the output shaft of the roller drive motor 3 is in transmission connection with the wheel hub 2; the spring device 4 is installed on the mounting frame 1 for buffering the walking vibration of the wheel hub 2 and ensuring the friction force of the wheel hub 2 on the ground. The roller drive motor 3 is electrically connected with a control system adopting a non-torque sensor adaptive model resistance control strategy, and the control system is prior art.

[0036] The advantages of using the above control system include:

[0037] Low cost: by establishing a precise force evaluator model to estimate the output of intelligent assistance in real time, the use of expensive torque sensors is eliminated. The use of embedded control systems compresses control costs. Assist safety: using more advanced control chips and optimized control parameters to ensure the stability and safety of the assistance, and to build a perfect intelligent assistance protection system. Through real-time monitoring of the motion state of the intelligent assistance equipment by sensors, timely alarm and prevention of dangerous states can effectively prevent dangerous situations. Natural human-computer interaction: through the use of multiple sensors and control algorithm analysis, the intelligent assistance equipment can better understand the user's operation intention. Users and intelligent assistance equipment can also achieve more comprehensive two-way communication and communication through various human-computer interaction interfaces. Strong adaptive ability: The force sensor adaptive model impedance assistance control strategy adopts a modular design, which is open, easy to modify, reconfigure and extend.

[0038] As can be known from the above, by setting the mounting frame 1, the fixing plate 11 is used to fixedly connect the heavy-duty cart frame, the first support plate 12, the second support plate 13 and the support shaft 14 provide reliable support for the wheel hub 2, the roller drive motor 3 is installed on the first support plate 12 to provide power drive for the wheel hub 2, that is, each wheel hub 2 on the heavy-duty cart frame has a power source, which provides sufficient power for the heavy-duty cart. At the same time, the spring device 4 is arranged on the mounting frame 1 to ensure the friction between the wheel hub 2 and the ground, which provides effective buffering for the walking vibration of the wheel hub 2, reduces the vibration of the heavy-duty cart, and improves the use comfort of the heavy-duty cart.

[0039] In the embodiment, a transmission mechanism 5 is arranged between the output shaft of the roller drive motor 3 and the wheel hub 2, the transmission mechanism 5 includes a driving pulley 51, a driven pulley 52, a synchronous belt 53 and a rotating output ring 54, the driving pulley 51 is fixedly connected with the output shaft of the roller drive motor 3, the driven pulley 52 is fixedly connected with the rotating output ring 54, the rotating output ring 54 is coaxially and rotatably connected with the support shaft 14 and rotatably matched with the wheel hub 2, and the synchronous belt 53 is wound between the driven pulley 52 and the driven pulley 52. Thus, the output shaft of the roller drive motor 3 can drive the rotating output ring 54 to rotate, the rotation of the wheel hub 2 is realized, and the transmission connection is stable and reliable.

[0040] In the embodiment, the assist wheel further comprises a speed reducer 6, the speed reducer 6 comprises a planet carrier 61, three planetary gears 62, a sun gear 63 and an output gear ring 64, the planet carrier 61 is fixedly connected to the support shaft 14, the three planetary gears 62 are rotatably connected to the planet carrier 61 and are uniformly distributed around the circumference, the sun gear is coaxially fixedly connected to the rotating output ring 54 and is in meshing transmission with the three planetary gears 62, the sun gear is arranged inside the three planetary gears 62, and the output gear ring 64 is coaxially fixedly connected to the wheel hub 2 and is in meshing transmission with the three planetary gears 62, the output gear ring 64 is arranged outside the three planetary gears 62, so that the rotating speed of the wheel hub 2 can be reduced, the rotating torque is enhanced, the output power is improved, and the gear reduction is stable and reliable.

[0041] In the embodiment, the spring device 4 comprises a first damping cylinder 41, a second damping cylinder 42, a first damping spring 43 and a second damping spring 44, the base of the first damping cylinder 41 is hingedly connected to the first support plate 12, the telescopic rod of the first damping cylinder 41 is hingedly connected to the fixed plate 11, the base of the second damping cylinder 42 is hingedly connected to the second support plate 13, the telescopic rod of the second damping cylinder 42 is hingedly connected to the fixed plate 11, the first damping spring 43 is coaxially sleeved on the first damping cylinder 41, one end of the first damping spring 43 is connected to the base of the first damping cylinder 41, and the other end of the first damping spring 43 is connected to the telescopic rod of the first damping cylinder 41; the second damping spring 44 is coaxially sleeved on the second damping cylinder 42, one end of the second damping spring 44 is connected to the base of the second damping cylinder 42, and the other end of the second damping spring 44 is connected to the telescopic rod of the second damping cylinder 42, so that when the support plate rotates around the fixed plate 11, the damping effect is achieved, and the walking vibration of the wheel hub 2 is buffered. The spring device can ensure the adhesion of the wheel hub 2 to the ground, and has sufficient friction force to ensure the assistance of the heavy-duty trolley. By adjusting the length and position of the spring, the heavy-duty trolley of different heights can be adapted.

[0042] In the embodiment, the two ends of the support shaft 14 are detachably connected to the first support plate 12 and the second support plate 13, respectively, so that the support shaft 14 can be detached from between the first support plate 12 and the second support plate 13, and the wheel hub 2 is convenient to disassemble and assemble. Specifically, the support shaft 14 is locked on the mounting frame 1 by a nut.

[0043] In the embodiment, the wheel hub 2 is made of anti-skid and wear-resistant material, so that the anti-skid and wear-resistant properties of the wheel hub 2 are improved.

[0044] In the description of the embodiments of the present application, it should be noted that the terms "inner", "outer", and the like indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is merely for the convenience of description, and does not indicate or imply that the device or member must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application.

[0045] In the description of the present application, the description referring to the terms "one embodiment", "some embodiments", "in this embodiment", "specific example", or "some examples" and the like means that the specific features, mechanisms, materials or characteristics described in conjunction with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, different embodiments or examples described in the specification and the features of different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0046] The above is merely a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An electric assist wheel, characterized by, The mounting frame (1) includes a fixed plate (11), a first support plate (12), a second support plate (13) and a support shaft (14), the fixed plate (11) is used for fixedly connecting the heavy load cart frame, the first support plate (12) and the second support plate (13) are hingedly connected at the bottom of the fixed plate (11), and the support shaft (14) is connected between the first support plate (12) and the second support plate (13) and is used for supporting the hub (2); the hub (2) is rotatably connected to the support shaft (14) and located between the first support plate (12) and the second support plate (13); the motor base of the roller drive motor (3) is fixedly installed on the first support plate (12), and the output shaft of the roller drive motor (3) is in transmission connection with the hub (2); the spring device (4) is installed on the mounting frame (1) and is used for buffering the walking vibration of the hub (2) and ensuring the friction force between the hub (2) and the ground.

2. The electric assist wheel of claim 1, wherein, The output shaft of the roller drive motor (3) is provided with a transmission mechanism (5) between the hub (2), the transmission mechanism (5) includes a driving pulley (51), a driven pulley (52), a synchronous belt (53) and a rotating output ring (54), the driving pulley (51) is fixedly connected with the output shaft of the roller drive motor (3), the driven pulley (52) is fixedly connected with the rotating output ring (54), the rotating output ring (54) is coaxially and rotatably connected to the support shaft (14) and is in rotational cooperation with the hub (2), and the synchronous belt (53) is wound between the driven pulley (52) and the driven pulley (52).

3. The electric assist wheel of claim 2, wherein, The reducer (6) includes a planet carrier (61), three planetary gears (62), a sun gear (63) and an output gear ring (64), the planet carrier (61) is fixedly connected to the support shaft (14), the three planetary gears (62) are rotatably connected to the planet carrier (61) and are uniformly distributed in the circumferential direction, the sun gear is coaxially fixedly connected with the rotating output ring (54) and is in meshing transmission with the three planetary gears (62), and the sun gear is arranged on the inner side of the three planetary gears (62). The output gear ring (64) is coaxially fixedly connected with the hub (2) and is in meshing transmission with the three planetary gears (62), and the output gear ring (64) is arranged on the outer side of the three planetary gears (62).

4. The electric assist wheel of claim 1, wherein, The spring device (4) includes a first damping cylinder (41) and a second damping cylinder (42), the base of the first damping cylinder (41) is hingedly connected with the first support plate (12), the telescopic rod of the first damping cylinder (41) is hingedly connected with the fixed plate (11), the base of the second damping cylinder (42) is hingedly connected with the second support plate (13), and the telescopic rod of the second damping cylinder (42) is hingedly connected with the fixed plate (11).

5. The electric assist wheel of claim 4, wherein, The spring device (4) further comprises a first damping spring (43) and a second damping spring (44), the first damping spring (43) is coaxially sleeved on the first damping cylinder (41), one end of the first damping spring (43) is connected with the base of the first damping cylinder (41), and the other end of the first damping spring (43) is connected with the telescopic rod of the first damping cylinder (41); the second damping spring (44) is coaxially sleeved on the second damping cylinder (42), one end of the second damping spring (44) is connected with the base of the second damping cylinder (42), and the other end of the second damping spring (44) is connected with the telescopic rod of the second damping cylinder (42).

6. The electric assist wheel of claim 1, wherein, The two ends of the supporting shaft (14) are detachably connected with the first supporting plate (12) and the second supporting plate (13) respectively.

7. The electric assist wheel of claim 1, wherein, The hub (2) is made of anti-skid and wear-resistant material.

8. The electric assist wheel of claim 1, wherein, The roller driving motor (3) is electrically connected with a control system adopting a resistance control strategy of a torque sensor adaptive model.

Images