CN220604197U - Centripetal force demonstrator for teaching - Google Patents

Abstract

The utility model discloses a centripetal force demonstrator for teaching, which comprises a box body, rubber pads, radiating windows, an operation panel, turntables, cantilevers, springs, sleeves, scales, cross arm baffle plates and steel balls, wherein the box body is of a quadrilateral rectangular structure, four groups of symmetrically distributed rubber pads are arranged at the bottom end of the box body, the radiating windows which are symmetrically distributed are arranged on the surface of the box body, the operation panel is arranged in the middle of the front end of the box body, two groups of symmetrically distributed turntables are arranged at the top end of the box body and are hinged and fixed through bearings, cantilevers are arranged at the top ends of the turntables, through holes are formed in the top ends of the cantilevers, springs are arranged at the inner sides of the cantilevers, sleeves are arranged at the top ends of the springs, scales are fixed at the inner sides of the springs, cross arm baffle plates are arranged on the surfaces of the sleeves, and steel balls are arranged between the top ends of the cantilevers and the cross arm baffle plates. The centripetal force demonstrator changes the original hand-operated structure and the condition that the rotation speed ratio needs to be manually changed through reasonable design, and effectively reduces the labor intensity of the centripetal force demonstrator in the teaching operation process.

Description

Centripetal force demonstrator for teaching

Technical Field

The utility model relates to a centripetal force demonstrator, in particular to a centripetal force demonstrator for teaching.

Background

In the teaching process of the centripetal force of the high school physics, the content is often too abstract to facilitate students to understand that teachers can demonstrate through the centripetal force demonstrator, so that students can understand more intuitively and efficiently, the currently used centripetal force demonstrator mostly needs manual hand-operated and the speed-changing disc needs manual adjustment of the speed ratio through belt transmission, and the operation is inconvenient, so that the novel centripetal force demonstrator for teaching, which can realize electric and automatic stepless speed change, is needed.

Disclosure of Invention

The utility model aims to provide a centripetal force demonstrator for teaching so as to solve the technical problems.

The utility model adopts the following technical scheme for realizing the purposes:

the utility model provides a centripetal force demonstrator for teaching, includes box, rubber pad, heat dissipation window, operating panel, carousel, cantilever, spring, sleeve, scale, xarm baffle, steel ball, four sets of symmetrical distribution's rubber pad is installed for four sides rectangle structures and bottom to the box, the heat dissipation window that symmetrical distribution has been opened on the box surface, box front end mid-mounting has operating panel, two sets of symmetrical distribution's carousel and pass through the bearing and articulate fixedly are installed on the box top, the cantilever is all installed on the carousel top, the through-hole is opened at the cantilever top and the spring is installed to the inboard, sleeve and inboard are fixed with the scale is installed at the spring top, sleeve surface mounting has xarm baffle and the other end is placed at the cantilever top, the steel ball has been placed between cantilever top and the xarm baffle.

On the basis of the technical scheme, a driving cone pulley fixed pulley connected by a key is arranged at the bottom end of the turntable at the left end, a driving cone pulley movable pulley connected in a sliding manner is arranged at the bottom end of the driving cone pulley fixed pulley, a first driving motor is arranged in the middle of the bottom end of the driving cone pulley movable pulley, the driving cone pulley fixed pulley and the driving cone pulley movable pulley are connected with a driven cone pulley fixed pulley and a driven cone pulley movable pulley at the right end through steel belts on the circumferential surfaces, and movable pulley moving devices are arranged at the bottoms of the driving cone pulley movable pulley and the driven cone pulley movable pulley.

On the basis of the technical scheme, the movable wheel moving device comprises a second driving motor, a driving gear, driven gears, a screw rod, a movable nut and a movable wheel stirring frame, wherein the driving gear connected with the second driving motor through a key is arranged at the top end of the second driving motor, the driven gears connected with the driving gear in a meshed mode are arranged at the two ends of the driving gear and symmetrically distributed, the screw rods symmetrically distributed are arranged at the top ends of the driven gears, the movable nut connected with the circumference surface of the screw rod through threads is arranged on the circumference surface of the screw rod, and the movable nut is connected with the movable wheel stirring frame through a bolt.

Compared with the prior art, the utility model has the following advantages: the centripetal force demonstrator can realize automatic centripetal force demonstration by taking the driving motor as a power source and then matching with the stepless speed changing box formed by the driving cone pulley, the driven cone pulley and the movable wheel moving device, reduces the teaching labor intensity of a teacher for manually providing power, changes the original operation mode that the belt and the speed changing disc need to be frequently disassembled and installed, saves the operation time of the teacher, and has simple and convenient operation, time saving and labor saving.

Drawings

FIG. 1 is a schematic view of the external structure of the present utility model.

Fig. 2 is a schematic view of the internal structure of the case of the present utility model.

Fig. 3 is a schematic structural view of a movable wheel moving device of the present utility model.

In the figure: 1. the box, 2, the rubber pad, 3, the heat dissipation window, 4, operating panel, 5, carousel, 6, cantilever, 7, spring, 8, sleeve, 9, scale, 10, the xarm baffle, 11, the steel ball, 12, initiative cone pulley fixed pulley, 13, initiative cone pulley running gear, 14, first driving motor, 15, the steel band, 16, driven cone pulley fixed pulley, 17, driven cone pulley running gear, 18, running gear mobile device, 19, second driving motor, 20, driving gear, 21, driven gear, 22, lead screw, 23, the removal nut, 24, running gear stir the frame.

Detailed Description

The utility model is described in further detail below with reference to the drawings and the specific examples.

As shown in fig. 1-3, a centripetal force demonstrator for teaching comprises a box body 1, a rubber pad 2, a heat dissipation window 3, an operation panel 4, a turntable 5, a cantilever 6, a spring 7, a sleeve 8, a scale 9, a cross arm baffle 10 and steel balls 11, wherein the box body 1 is of a quadrilateral rectangular structure, four groups of symmetrically distributed rubber pads 2 are arranged at the bottom end of the box body, the heat dissipation window 3 which is symmetrically distributed is arranged on the surface of the box body 1, the operation panel 4 is arranged at the middle part of the front end of the box body 1, two groups of symmetrically distributed turntables 5 are arranged at the top end of the box body 1 and are hinged and fixed through bearings, the cantilever 6 is arranged at the top end of each turnplate 5, the through hole is formed in the top of the cantilever 6, the spring 7 is arranged at the top of the cantilever, the scale 9 is fixed at the inner side of the sleeve 8, the baffle 10 is arranged on the surface of the sleeve 8, the other end of the cross arm 6, and the steel balls 11 are arranged between the top of the cantilever 6 and the cross arm baffle 10.

The bottom end of the turntable 5 at the left end is provided with a driving cone pulley fixed pulley 12 which is connected with a key, the bottom end of the driving cone pulley fixed pulley 12 is provided with a driving cone pulley movable pulley 13 which is connected with a sliding way, the middle part of the bottom end of the driving cone pulley movable pulley 13 is provided with a first driving motor 14, the driving cone pulley fixed pulley 12 and the driving cone pulley movable pulley 13 are connected with a driven cone pulley fixed pulley 16 and a driven cone pulley movable pulley 17 at the right end through a steel belt 15 on the circumferential surface, and the bottoms of the driving cone pulley movable pulley 13 and the driven cone pulley movable pulley 17 are provided with a movable pulley moving device 18.

The movable wheel moving device 18 comprises a second driving motor 19, a driving gear 20, a driven gear 21, a screw rod 22, a moving nut 23 and a movable wheel stirring frame 24, wherein the driving gear 20 connected with the second driving motor 19 through a key is arranged at the top end of the second driving motor 19, the driven gears 21 connected with the driving gear 20 in a meshed mode are arranged at the two ends of the driving gear 20 in a symmetrical mode, the screw rods 22 distributed symmetrically are arranged at the top ends of the driven gears 21, the moving nuts 23 connected with the movable wheel stirring frame 24 through threaded connection are arranged on the circumferential surfaces of the screw rods 22, and the moving nuts 23 are connected with the movable wheel stirring frame 24 through bolts.

The working principle of the utility model is as follows: firstly, a driving cone pulley movable wheel and a driving cone pulley fixed wheel are driven to rotate by a driving motor, then the driving cone pulley movable wheel and the driving cone pulley fixed wheel drive a driven cone pulley movable wheel and a driven cone pulley fixed wheel at the right end to rotate by a steel belt so as to drive two groups of turntables at the top to rotate, then the cantilever, the sleeve, the cross arm baffle plate and the steel balls are driven by the turntable, then the sleeve compresses the spring to expose the scale during the rotation process of the cantilever, the sleeve, the cross arm baffle plate and the steel balls, and then the observation scale is compared to obtain a conclusion so as to realize the demonstration teaching process of centripetal force, meanwhile, when the rotation speed ratio of the two turntables is required to be adjusted, the driving gear at the top is required to be driven to rotate by the second driving motor, the driving gear is meshed with the driven gears at the two sides so as to drive the driven gears and the screw rod at the top to rotate, the screw rod is matched with the movable nut in the rotating process to convert the rotation motion of the second driving motor into the lifting motion of the movable wheel toggle frame, and because the rotation directions of the screw rods are opposite, the lifting track of the movable wheel toggle frame is synchronous but opposite, then when the movable wheel poking frame at the left side drives the movable wheel of the driving cone pulley to ascend, the gap between the fixed wheel of the driving cone pulley and the movable wheel of the driving cone pulley is reduced and the steel belt is further extruded, so that the steel belt is far away from the axle center to realize the effect of enlarging the fixed wheel of the driving cone pulley and the movable wheel of the driving cone pulley, and simultaneously the movable wheel poking frame at the right end drives the movable wheel of the driven cone pulley to descend, then the steel belt approaches the axle center to further realize the effect that the driven cone pulley fixed pulley and the driven cone pulley movable pulley become smaller (the principle is consistent with that of the CVT gearbox), and the second driving motor reversely rotates to enable the driving cone pulley fixed pulley and the driving cone pulley movable pulley to become smaller, so that the rotation speed ratio reversely rotates.

The foregoing is a preferred embodiment of the present utility model, and it will be apparent to those skilled in the art from this disclosure that changes, modifications, substitutions and alterations can be made without departing from the principles and spirit of the utility model.

Claims (3)

1. The utility model provides a centripetal force demonstrator for teaching, includes box (1), rubber pad (2), heat dissipation window (3), operating panel (4), carousel (5), cantilever (6), spring (7), sleeve (8), scale (9), xarm baffle (10), steel ball (11), its characterized in that: the utility model discloses a novel energy-saving box, including box (1), cantilever (6), sleeve (8) and scale (9) are installed to box (1) top, box (1) is four sets of rubber pads (2) that the symmetry distributes for four sets of symmetry formula are installed to bottom, box (1) surface open has heat dissipation window (3) that the symmetry distributes, box (1) front end mid-mounting has operating panel (4), carousel (5) and the articulated fixed through the bearing that two sets of symmetries distribute are installed on box (1) top, cantilever (6) are all installed on carousel (5) top, cantilever (6) top is opened there is through-hole and inboard installs spring (7), sleeve (8) are installed at spring (7) top and inboard is fixed with scale (9), sleeve (8) surface mounting has cross arm baffle (10) and the other end is placed at cantilever (6) top, place steel ball (11) between cantilever (6) top and the cross arm baffle (10).

2. A teaching centripetal force demonstrator as defined in claim 1, wherein: the automatic driving device is characterized in that a driving cone pulley fixed pulley (12) connected with a key is arranged at the bottom end of a turntable (5) at the left end, a driving cone pulley movable pulley (13) connected with the bottom end of the driving cone pulley fixed pulley (12) in a sliding mode is arranged at the bottom end of the driving cone pulley fixed pulley, a first driving motor (14) is arranged in the middle of the bottom end of the driving cone pulley movable pulley (13), the driving cone pulley fixed pulley (12) and the driving cone pulley movable pulley (13) are connected with a driven cone pulley fixed pulley (16) and a driven cone pulley movable pulley (17) at the right end through steel belts (15) on the circumferential surface, and movable pulley moving devices (18) are arranged at the bottoms of the driving cone pulley movable pulley (13) and the driven cone pulley movable pulley (17).

3. A teaching centripetal force demonstrator as defined in claim 2, wherein: the movable wheel moving device (18) comprises a second driving motor (19), a driving gear (20), driven gears (21), screw rods (22), moving nuts (23) and a movable wheel stirring frame (24), wherein the driving gear (20) connected with the second driving motor (19) is arranged at the top end, the driven gears (21) connected with the driving gear (20) in a meshed mode are arranged at the two ends of the driving gear (20) in a symmetrical mode, the screw rods (22) distributed symmetrically are arranged at the top ends of the driven gears (21), the moving nuts (23) connected with the circumference surfaces of the screw rods (22) in a threaded mode are arranged, and the moving nuts (23) are connected with the movable wheel stirring frame (24) through bolts.