Differential mechanism demonstration device

Abstract

The utility model provides a differential demonstration device, which relates to the field of demonstration devices and comprises a display stand, a demonstration assembly and a monitoring system. The demonstration assembly comprises a hand wheel, a rotating wheel and a differential body, the hand wheel is connected with the differential body through an input shaft and used for driving the differential body, and the differential body is connected with the rotating wheel through an output shaft. The brake is used for braking the differential body; magnets in the monitoring system are distributed on a rim of the rotating wheel, a light emitting diode is located on a spoke of the rotating wheel, and a Hall sensor is installed on the display stand and located under the rotating wheel; when the rotating wheel rotates, the magnet passes through the Hall sensor, the Hall sensor monitors the rotating speed of the driving wheel and converts a speed signal into an electric signal to be transmitted to the light-emitting diode, and the light-emitting diode displays different brightness. The differential mechanism has the advantage that the movement of the differential mechanism can be observed more visually through the brightness of the light-emitting diodes.

Description

TECHNICAL FIELD

[0001] The utility model relates to a demonstration device, especially in a differential mechanism demonstration device. BACKGROUND

[0002] The differential mechanism is a kind of device with power transmission and power distribution function.Its role is when the car turns and travels or travels on uneven road, makes left and right wheels to roll at different speeds, i.e.it guarantees that both sides drive wheels make pure rolling motion, to guarantee that outer wheel does not drag on road, avoid the aggravation of tire wear, to ensure the safety factor of traveling vehicle, improve the running life of reducer.In the teaching process, students understand the structure of differential mechanism, and the understanding is faster and more accurate through the exercise of combining physical object, especially when the structure is complex, the role of teaching aid demonstration is particularly important.

[0003] The existing differential mechanism demonstration teaching aid, for example, the utility model patent with the announcement number "CN204155542U" discloses differential mechanism demonstration device, including rack and motor, transmission device, differential mechanism, half shaft and brake device installed on the rack, wherein: differential mechanism is connected with half shaft;Motor is connected with differential mechanism through transmission device, for driving differential mechanism;Brake device is connected with half shaft, for realizing the brake of differential mechanism teaching aid.But the structure has the following problems: in the demonstration process, the motion state of differential mechanism can only be observed by eyes, and the speed size change of two sides wheels driven by differential mechanism cannot be observed directly. UTILITY MODEL CONTENT

[0004] The utility model provides a differential mechanism demonstration device for the above problems existing in prior art, and the utility model utilizes hall effect, monitors the rotating speed of rotating wheel through hall sensor, so that light emitting diode displays different brightness according to rotating speed, and the motion state of differential mechanism is more directly observed.

[0005] The technical scheme that the utility model solves above-mentioned technical problem is as follows: a differential mechanism demonstration device includes demonstration component installed on display table, and the demonstration component includes hand wheel, rotating wheel and differential mechanism body, the hand wheel is connected with differential mechanism body through input shaft and is used for driving differential mechanism body, the rotating wheel is connected with differential mechanism body through output shaft and is used for realizing the brake of differential mechanism body, further include monitoring system, the monitoring system includes light emitting diode, magnet and hall sensor, the magnet is distributed on the rim of rotating wheel, the light emitting diode is arranged on the spoke of rotating wheel, the hall sensor is fixedly installed on display table, and the hall sensor is located directly below rotating wheel, and the hall sensor is electrically connected with light emitting diode, when rotating wheel rotates and drives magnet to pass through hall sensor, the hall sensor is used to convert the rotating speed signal of monitored rotating wheel into electric signal and is transmitted to light emitting diode, to show the rotating speed size of rotating wheel through the brightness size displayed by light emitting diode.

[0006] Further, the output shaft and the input shaft are installed on the display table through the support plate.

[0007] Further, the differential body driving wheel, driven wheel, planetary gear and sun gear, the input shaft end fixedly connected with the middle part of the driving wheel, the driving wheel engages the driven wheel, the driven wheel inside fixedly connected with the side plate, the planetary gear is rotatably connected on the side plate and respectively engages with two sun gears, the driven wheel drives the planetary gear to rotate, the planetary gear drives the sun gear to rotate, and the sun gear is coaxially fixed with the runner through the output shaft.

[0008] The beneficial effects of the present application are: the present application is provided with a monitoring system, the monitoring system comprises a light emitting diode, a magnet and a hall sensor, when the runner rotates, the magnet passes through the hall sensor, the hall sensor monitors the rotating speed of the runner, converts the speed signal into an electrical signal and transmits it to the light emitting diode, so that the light emitting diode displays different brightness, and the brightness displayed by the light emitting diode is more intuitive to observe the movement of the differential. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 is the overall structure schematic view of the present application;

[0010] Figure 2 is the demonstration assembly structure schematic view of the present application;

[0011] In the figure: 1. display table, 2. hand wheel, 3. runner, 4. input shaft, 5. output shaft, 6. light emitting diode, 7. magnet, 8. hall sensor, 9. support plate, 10. driving wheel, 11. driven wheel, 12. planetary gear, 13. sun gear, 14. side plate. DETAILED DESCRIPTION

[0012] The principle and characteristics of the present application are described below, and the examples are only used to explain the present application, and are not used to limit the scope of the present application.

[0013] As Figure 1 and Figure 2As shown, the differential demonstration device of the embodiment comprises a demonstration assembly installed on a display platform 1, the demonstration assembly comprises a hand wheel 2, a rotating wheel 3 and a differential body, the hand wheel 2 is connected with the differential body through an input shaft 4 and is used for driving the differential body; the rotating wheel 3 is connected with the differential body through an output shaft 5 and is used for realizing the braking of the differential body; further comprising a monitoring system, the monitoring system comprises a light emitting diode 6, a magnet 7 and a Hall sensor 8, the magnet 7 is distributed on the rim of the rotating wheel 3, the light emitting diode 6 is arranged on the spoke of the rotating wheel 3, the Hall sensor 8 is fixedly installed on the display platform 1, the Hall sensor 8 is located directly below the rotating wheel 3, and the Hall sensor 8 is electrically connected with the light emitting diode 6; when the rotating wheel 3 rotates to drive the magnet 7 to pass through the Hall sensor 8, the Hall sensor 8 is used for converting the rotating speed signal of the rotating wheel 3 monitored into an electric signal and transmitting the electric signal to the light emitting diode 6, so as to demonstrate the rotating speed of the rotating wheel 3 through the brightness displayed by the light emitting diode 6.

[0014] The Hall sensor 14 of the embodiment is an NJK-5002C three-wire NPN Hall sensor, in the demonstration process, the Hall effect is utilized, when the rotating wheel 3 rotates, the magnet 7 generates the magnetic field required by the Hall effect, the hand wheel 2 is rotated, the rotating speeds of the two rotating wheels 3 are same, the brightness displayed by the light emitting diodes 6 on the two rotating wheels 3 is same, the greater the rotating speed is, the brighter the brightness displayed by the light emitting diode 6 is; one of the rotating wheels 3 is pressed, the other rotating wheel 3 is rotated, the brightness displayed by the light emitting diodes 6 on the two rotating wheels 3 is different, the brightness displayed by the light emitting diode 6 of the rotating wheel 3 with the greater rotating speed is brighter.

[0015] In the embodiment, the input shaft 4 and the output shaft 5 are installed on the display platform 1 through a support plate 9; the differential body of the embodiment is a symmetrical bevel gear differential of the prior art, which comprises a driving wheel 10, a driven wheel 11, two planetary gears 12 and two sun gears 13, the input shaft 4 is fixedly connected with the middle part of the driving wheel 10 at the end, the driving wheel 10 is engaged with the driven wheel 11, the inner side of the driven wheel 11 is fixedly connected with a side plate 14, the planetary gears 12 are rotatably connected on the side plate 14 and are engaged with the two sun gears 13 respectively, the driven wheel 11 drives the planetary gears 12 to rotate, the planetary gears 12 drive the sun gears 13 to rotate, and the sun gears 13 are fixed coaxially with the rotating wheel 3 through the output shaft 5; the installation is convenient and is beneficial to operation.

[0016] The above embodiments are used for further illustrating the utility model, but the utility model is not limited to these specific embodiments. Any modification, equivalent replacement and variation made within the spirit and principle of the utility model should be understood as being within the protection scope of the utility model.

Claims

1. A differential demonstration device, comprising a demonstration assembly installed on a display table (1), the demonstration assembly comprising a hand wheel (2), a rotating wheel (3) and a differential body, the hand wheel (2) being connected with the differential body through an input shaft (4) for driving the differential body, the rotating wheel (3) being connected with the differential body through an output shaft (5) for realizing braking of the differential body. characterized in that Further comprising a monitoring system, the monitoring system comprising a light-emitting diode (6), a magnet (7) and a Hall sensor (8), the magnet (7) being distributed on a rim of the rotating wheel (3), the light-emitting diode (6) being arranged on a spoke of the rotating wheel (3), the Hall sensor (8) being fixedly installed on the display table (1) and located directly below the rotating wheel (3), the Hall sensor (8) being electrically connected with the light-emitting diode (6); when the rotating wheel (3) rotates to drive the magnet (7) to pass through the Hall sensor (8), the Hall sensor (8) is used for converting a rotating speed signal of the rotating wheel (3) monitored into an electric signal and transmitting the electric signal to the light-emitting diode (6) to display the rotating speed of the rotating wheel (3) through the brightness of the light-emitting diode (6).

2. A differential demonstration device according to claim 1, wherein The input shaft (4) and the output shaft (5) are installed on the display table (1) through a support plate (9).

3. The differential demonstration device of claim 1, wherein, The differential body comprises a driving wheel (10), a driven wheel (11), a planetary gear (12) and a sun gear (13), the input shaft (4) being fixedly connected with a middle part of the driving wheel (10) at an end thereof, the driving wheel (10) being engaged with the driven wheel (11), the driven wheel (11) being fixedly connected with a side plate (14) at an inner side thereof, the planetary gear (12) being rotatably connected with the side plate (14) and engaged with two sun gears (13) respectively, the driven wheel (11) driving the planetary gear (12) to rotate, the planetary gear (12) driving the sun gear (13) to rotate, and the sun gear (13) being coaxially fixed with the rotating wheel (3) through the output shaft (5).

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