Gravity car race track for teaching experiment

Abstract

The application provides a gravity trolley raceway for teaching experiments, and belongs to the technical field of teaching equipment. The gravity trolley raceway for teaching experiments in the prior art cannot launch multiple gravity trolleys simultaneously. The gravity trolley raceway for teaching experiments comprises a raceway component, the raceway component comprises a straight track, an inclined track arranged at one end of the straight track, and multiple groups of arc-shaped tracks connected with the inclined track at one end and connected with the straight track at the other end, the inclined track forms an angle alpha with the horizontal plane, and 0°<alpha<90°; a launching mechanism, the launching mechanism comprises a launching support fixedly connected with the inclined track, a rotating shaft rotatably connected with the launching support, and multiple stoppers fixedly connected with the rotating shaft in an array; the gravity trolley is placed behind the stoppers; a start position sensor is arranged on the launching support, the start position sensor can detect the rotating position of the rotating shaft, and a terminal support is arranged at the other end of the straight track, and multiple terminal position sensors are installed on the terminal support.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of teaching equipment, more particularly, relates to a gravity car race track for teaching experiment. BACKGROUND

[0002] The model is a traditional science and technology project, and is deeply loved by the majority of young people because of its unique knowledge and interest. In general teaching experiments, especially in physical experiments, various car models are essential for exploring physical principles. The car model can simulate the movement process, so that students can further explore the scientific nature of the movement model.

[0003] Such as application number: CN201710356609.6.

[0004] Based on the above patent search, and combined with the existing technology, the existing track cannot solve the problem of simultaneously launching multiple gravity cars.

[0005] Therefore, in view of the above, the existing structure and defects are studied and improved, and a gravity car race track for teaching experiment is provided, so as to achieve the purpose of more practical value. SUMMARY

[0006] In order to solve the above technical problems, the present application provides a gravity car race track for teaching experiment, so as to solve the problem that the existing gravity car race track for teaching experiment cannot simultaneously launch multiple gravity cars.

[0007] The purpose and effect of the gravity car race track for teaching experiment are achieved by the following specific technical means:

[0008] A gravity car race track for teaching experiment comprises:

[0009] The race track member comprises a straight track, an inclined track arranged at one end of the straight track, and a plurality of arc-shaped tracks connected at one end with the inclined track, the other end of the arc-shaped track being connected with the straight track, the angle between the inclined track and the horizontal plane being alpha, 0° < alpha < 90°;

[0010] The launching mechanism comprises a launching support fixedly connected with the inclined track, a rotating shaft rotatably connected with the launching support, and a plurality of stop rods fixedly connected with the rotating shaft in an array, the stop rods being distributed along the axial direction of the rotating shaft, and the stop rods being drivingly connected with a rotating mechanism;

[0011] A plurality of gravity cars are arranged side by side on the inclined track, and the gravity cars are placed behind the stop rods;

[0012] The start position sensor is arranged on the starting support, and can detect the rotating position of the rotating shaft. The end support is arranged at the other end of the straight track, and a plurality of end position sensors are mounted on the end support. The number of the end position sensors is consistent with the number of the gravity trolleys, and each end position sensor corresponds to one trolley. The plurality of end position sensors respectively detect the time when the trolleys at the corresponding positions reach the end support.

[0013] Further, the straight track and the inclined track are composed of one track unit or are spliced by two or more track units. The track unit comprises a flat plate, side plates arranged on both sides of the flat plate, and a plurality of guide protrusions arranged transversely. The guide protrusion comprises two parallel protrusions, and the two protrusions guide the moving direction of the trolley.

[0014] Further, the arc-shaped track is an arc-shaped connecting member. The arc-shaped connecting member comprises two inner arc-shaped blocks and two outer arc-shaped blocks. The two inner arc-shaped blocks are arranged between the two outer arc-shaped blocks. One end of the arc surface of the inner arc-shaped block is smoothly connected with the protrusion of the straight track, and the other end of the arc surface of the inner arc-shaped block is smoothly connected with the protrusion of the inclined track. The width of the arc surface of the inner arc-shaped block is consistent with the width of the protrusion.

[0015] Further, the arc-shaped track is an arc-shaped connecting seat. The arc-shaped connecting seat comprises a support part, a track arc surface fixedly connected to the upper part of the support part, and a plurality of guide rail parts arranged transversely on the track arc surface. The upper part of the guide rail part is smoothly connected with the protrusion of the inclined track, and the lower part of the guide rail part is smoothly connected with the protrusion of the straight track. The width of the guide rail part is consistent with the width of the protrusion.

[0016] Further, the arc-shaped track is a flexible connecting piece. The flexible connecting piece comprises a docking plate and a plurality of flexible guide rails arranged transversely. The flexible guide rail is formed by a plurality of longitudinal protrusions. The plurality of protrusions are fixedly connected to the upper surface of the docking plate. The docking plate is connected with the straight track and the inclined track along the distribution direction of the protrusions. The flexible guide rail is arranged correspondingly with the protrusion.

[0017] Further, the rotating mechanism is a steering wheel, and the steering wheel is in transmission connection with one end of the rotating shaft.

[0018] Further, the rotating mechanism is a handle fixedly connected to one end of the rotating shaft.

[0019] Further, the rear side of the inclined track is connected with a rear support frame at the lower part.

[0020] Further, the rear support frame is a fixed support frame. The fixed support frame comprises a transverse support frame fixedly connected with the lower end of the inclined track, and a longitudinal support frame fixedly connected with the rear part of the transverse support frame at the lower end. The upper part of the longitudinal support frame is fixedly connected with the upper part of the inclined track.

[0021] Further, the rear support frame is an adjusting support frame, the adjusting support frame comprises a transverse support frame, an adjusting vertical support column fixedly connected with the lower end of the transverse support frame, the adjusting vertical support column comprises a sleeve fixedly connected with the lower end of the transverse support frame, a telescopic rod sleeved in the sleeve, a sliding locking member mounted on the upper end of the telescopic rod, and a buckle member mounted on the outer circumference of the sleeve.

[0022] The sleeve is provided with a through hole penetrating the sleeve from top to bottom, and the upper circumferential wall of the sleeve is provided with a sliding hole in communication with the through hole.

[0023] The telescopic rod is provided with a plurality of tooth grooves arranged along the axial direction of the telescopic rod.

[0024] The sliding locking member comprises a sliding block hinged to the upper end of the telescopic rod, and a locking knob threadedly connected with the sliding block, the locking knob being capable of locking the sliding block on the inclined track.

[0025] The buckle member comprises a clamping block slidingly arranged in the sliding hole, a spring fixedly connected with one end of the clamping block, a buckle cover fixedly connected with the outer circumferential wall of the sleeve, and a pry piece rotationally connected with the middle part of the outer circumferential wall of the sleeve, the other end of the spring being fixedly connected with the buckle cover, and the pry piece being capable of prying the clamping block to move to the right side.

[0026] The lower end of the inclined track is provided with a hinged frame, the hinged frame comprises a first hinged rod fixedly connected with the rear end of the flat track, a hinge piece connected with the rear end of the first hinged rod, and a second hinged rod connected with the front end of the hinge piece, the second hinged rod being fixedly connected with the lower end of the inclined track.

[0027] Compared with the prior art, the present application has the following beneficial effects:

[0028] The present application provides a gravity car race track for teaching experiments, and multiple gravity cars can be launched simultaneously. Through teaching experiments, students can combine theory with reality and master the relationship between gravitational potential energy, kinetic energy, inertia and consumption by using different gravity cars on the same track. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a schematic diagram of the three-dimensional structure of the first embodiment of the present application.

[0030] Figure 2 is a schematic diagram of the three-dimensional structure of the second embodiment of the present application (first perspective view).

[0031] Figure 3 is a schematic diagram of the three-dimensional structure of the second embodiment of the present application (second perspective view).

[0032] Figure 4 is Figure 3Enlarged structural schematic view at A.

[0033] Figure 5 Figure 3 Enlarged structural schematic view at B.

[0034] Figure 6 Schematic view of the three-dimensional structure of the track unit of the present application.

[0035] Figure 7 Schematic view of the side structure of the third embodiment of the present application.

[0036] Figure 8 Figure 7 Enlarged structural schematic view at C.

[0037] Figure 9 Schematic view of the three-dimensional structure of the arc-shaped track of the first embodiment of the present application.

[0038] Figure 10 Schematic view of the three-dimensional structure of the arc-shaped track of the second embodiment of the present application.

[0039] Figure 11 Schematic view of the three-dimensional structure of the arc-shaped track of the third embodiment of the present application.

[0040] Figure 12 Schematic view of the three-dimensional structure of the longitudinal adjusting strut of the third embodiment of the present application.

[0041] Figure 13 Figure 12 Enlarged structural schematic view at D.

[0042] Figure 14 Schematic view of the circuit connection of the present application.

[0043] In the figure, the correspondence between the component names and the figure numbers is as follows:

[0044] Track member 1, straight track 11, inclined track 12, arc-shaped track 13, inner arc-shaped stop block 131, outer arc-shaped stop block 132, support part 133, track arc surface 134, guide rail part 135, docking plate 136, flexible guide rail 137, protrusion 137a, track unit 10, side stop plate 101, guide protrusion 102, protrusion 102a

[0045] Starting mechanism 2, starting support 21, rotating shaft 22, stop lever 221, steering engine 23, starting point position sensor 24, handle 25, end point support 3, end point position sensor 31,

[0046] Rear support frame 4, transverse support frame 41, longitudinal support frame 42, longitudinal adjusting strut 43, hinged frame 44, first hinged rod 441, hinge 442, second hinged rod 443, ​​​

[0047] Sleeve 431, through hole 4311, sliding hole 4312, telescopic rod 432, toothed groove 4321, sliding locking component 433, slider 4331, locking knob 4332, buckle component 434, buckle block 4341, spring 4342, buckle cover 4343, pry plate 4344, gravity trolley 5. Detailed Implementation

[0048] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0049] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0050] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0051] Example 1:

[0052] As attached Figure 1 To be continued Figure 13 As shown:

[0053] This invention provides a gravity-powered car track for teaching experiments, comprising:

[0054] Track component 1 includes a straight track 11, an inclined track 12 set at one end of the straight track 11, and multiple sets of arc tracks 13 connected to the inclined track 12 at one end. The other end of the arc tracks 13 is connected to the straight track 11. The angle between the inclined track 12 and the horizontal plane is α, where 0° < α < 90°.

[0055] The starting mechanism 2 comprises a starting support 21 fixedly connected to the inclined track 12, a rotating shaft 22 rotationally connected to the starting support 21, and a plurality of stoppers 221 fixedly connected to the rotating shaft 22 in an array, the stoppers 221 being distributed along the axial direction of the rotating shaft 22, and the stoppers 221 being drivingly connected with a rotating mechanism;

[0056] The plurality of gravity trolleys 5 are placed side by side on the inclined track 12, and the gravity trolleys 5 are placed behind the stoppers 221.

[0057] The starting support 21 is provided with a starting position sensor 24 capable of detecting the rotating position of the rotating shaft 22, and the other end of the straight track 11 is provided with an ending support 3, and the ending support 3 is provided with a plurality of ending position sensors 31 corresponding to the number of the gravity trolleys 5, and the plurality of ending position sensors 31 are respectively arranged to detect the time when the corresponding gravity trolleys reach the ending support 3.

[0058] In the embodiment, the plurality of gravity trolleys 5 are blocked behind the stoppers 221, and after the stoppers 221 are rotated by a certain angle, the plurality of gravity trolleys 5 can simultaneously slide downward from the inclined track 12, and when the stoppers 221 are rotated by a certain angle, the starting position sensor 24 can detect the original position of the stoppers 221 and start timing, so as to obtain the starting time of the gravity trolleys 5, and after the gravity trolleys 5 reach the ending position, the ending position sensor 31 corresponding to each gravity trolley 5 detects the time when the gravity trolley 5 reaches the ending position, so as to obtain the time required for the gravity trolley 5 to move from the starting position to the ending position.

[0059] The rotating mechanism is a steering wheel 23 drivingly connected to one end of the rotating shaft 22, or the rotating mechanism is a handle 25 fixedly connected to one end of the rotating shaft 22.

[0060] The steering wheel 23 or the handle 25 can be used to rotate the rotating shaft 22, and the plurality of gravity trolleys 5 can be simultaneously started. The steering wheel 23 can be used to realize automatic control, and a controller, a power supply, and a starting button are arranged and electrically connected with the steering wheel 23 to realize the purpose of rotating the rotating shaft 22.

[0061] The rear support frame 4 is fixedly connected to the lower part of the rear side of the inclined track 12.

[0062] The rear support frame 4 is a fixed support, which comprises a horizontal support frame 41 fixedly connected to the lower end of the inclined track 12, and a vertical support frame 42 fixedly connected to the rear part of the horizontal support frame 41 at the lower end, and the upper part of the vertical support frame 42 is fixedly connected to the upper part of the inclined track 12.

[0063] The rear support frame 4 can make the inclined track 12 more stable and less likely to be tilted or overturned.

[0064] The flat track 11 and the inclined track 12 are formed by one track unit 10 or two or more track units 10 spliced together, and the track unit 10 comprises a flat plate 103, side plates 101 arranged on both sides of the flat plate 103, and a plurality of guide protrusions 102 arranged transversely, wherein the guide protrusions 102 comprise two parallel protrusions 102a guiding the moving direction of the gravity car.

[0065] The track unit 10 can be integrally formed by bending or stamping, and has a simple and practical structure. The guide protrusions 102 guide the moving direction of the gravity car 5. In the experiment, the gravity cars 5 do not collide with each other, preventing interference between them. In the gravity car race, the same track and different gravity cars 5 can help students combine theory with reality and master the relationship between gravitational potential energy, kinetic energy and energy consumption. For example, the speed of the gravity car 5 of different shapes sliding to the finish line can be used to obtain the influence of the shape of the gravity car 5 on the running speed.

[0066] The arc-shaped track 13 is an arc-shaped connecting member comprising two inner arc-shaped blocks 131 and two outer arc-shaped blocks 132, wherein the two inner arc-shaped blocks 131 are arranged between the two outer arc-shaped blocks 132, the arc surface of the inner arc-shaped block 131 is smoothly connected with the protrusion 102a of the flat track 11 at one end, the arc surface of the inner arc-shaped block 131 is smoothly connected with the protrusion 102a of the inclined track 12 at the other end, and the width of the arc surface of the inner arc-shaped block 131 is consistent with the width of the protrusion 102a.

[0067] The arrangement of the inner arc-shaped block 131 and the outer arc-shaped block 132 enables the smooth connection of the flat track 11 and the inclined track 12, and the gravity car 5 can smoothly slide from the inclined track 12 to the flat track 11, and the inner arc-shaped block 131 guides the moving direction of the gravity car 5.

[0068] As shown in Figure 14 The circuit connection of the application is connected with ED (i.e. slave) through USB data line to realize data transmission, ED is powered by 18650 battery with a voltage of 6-12V, and the start point position sensor, each end point position sensor and the steering engine are powered by ED and connected with ED through signal line. First, ED sends a start signal to the steering engine, and then the steering engine rotates to drive the rotating shaft 22 to start the race, at this time, the start point position sensor sends an electric signal to ED to start timing, when the car in a certain lane reaches the end point, the end point position sensor at the corresponding position sends an electric signal to ED, at this time, ED stops timing to obtain the time of each car reaching the end point. The integrated data information can be transmitted to the PC end and viewed by the user.

[0069] Example two:

[0070] As Figure 2 , 3 , 6 and 10, the rest of the structure is the same as example one, the difference is that in this embodiment, the arc track 13 is an arc-shaped connecting seat, which includes a support part 133, an arc surface 134 fixedly connected to the upper part of the support part 133, and a plurality of guide rail parts 135 arranged transversely on the arc surface 134. The upper part of the guide rail part 135 is smoothly connected with the convex strip 102a of the inclined track 12, and the lower part of the guide rail part 135 is smoothly connected with the convex strip 102a of the flat track 11. The width of the guide rail part 135 is consistent with the width of the convex strip 102a.

[0071] Among them, the arc track 13 in this embodiment has a simple structure and is easy to manufacture, and is integrally arranged. When the inclination angle of the inclined track 12 is changed, the appropriate arc track 13 can be quickly replaced.

[0072] Example three:

[0073] As Figure 7 , 8 , 11, 12 and 13, the rest of the structure is the same as example one, the difference is that in this embodiment, the arc track 13 is a flexible connecting piece, which includes a docking plate 136 and a plurality of flexible guide rails 137 arranged transversely. The flexible guide rail 137 is longitudinally arranged by a plurality of convex blocks 137a fixedly connected to the upper surface of the docking plate 136. The docking plate 136 is connected with the flat track 11 and the inclined track 12 along the distribution direction of the convex block 137a, and the flexible guide rail 137 is correspondingly arranged with the convex strip 102a.

[0074] Among them, the flexible structure of the arc track 13 in this embodiment is arranged, the docking plate 136 has a certain flexibility and can bend within a certain angle range. The convex blocks 137a are arranged on the docking plate 136 at a certain distance, which not only ensures that the docking plate 136 can bend, but also can be connected with the convex strip 102a, and plays a role in guiding the moving direction of the gravity car 5.

[0075] The docking plate 136 can be made of plastic, rubber, leather, paper and other materials with certain flexibility. According to the situation, wear-resistant materials or waterproof materials can be coated.

[0076] The rear support frame 4 is an adjusting support, which includes a transverse support frame 41 and an adjusting longitudinal support 43 fixedly connected to the lower end of the transverse support frame 41. The adjusting longitudinal support 43 includes a sleeve 431 fixedly connected to the lower end of the transverse support frame 41, a telescopic rod 432 slidably sleeved in the sleeve 431, a sliding locking member 433 mounted on the upper end of the telescopic rod 432, and a buckle member 434 mounted on the outer circumference of the sleeve 431.

[0077] The sleeve 431 is provided with a through hole 4311 penetrating through the sleeve 431 from top to bottom, and the upper circumferential side wall of the sleeve 431 is provided with a sliding hole 4312 in communication with the through hole 4311;

[0078] The telescopic rod 432 is arranged with a plurality of tooth grooves 4321 along the axial direction of the telescopic rod 432;

[0079] The sliding locking member 433 comprises a sliding block 4331 hinged to the upper end of the telescopic rod 432, and a locking knob 4332 threadedly connected to the sliding block 4331, and the locking knob 4332 can lock the sliding block 4331 on the inclined rail 12;

[0080] The buckle member 434 comprises a clamping block 4341 slidingly arranged in the sliding hole 4312, a spring 4342 fixedly connected to one side of the clamping block 4341, a buckle cover 4343 fixedly connected to the outer circumferential wall of the sleeve 431, and a prying piece 4344 rotatably connected to the middle part of the outer circumferential wall of the sleeve 431, wherein the other end of the spring 4342 is fixedly connected to the buckle cover 4343, and the prying piece 4344 can pry the clamping block 4341 to move to the right side;

[0081] The lower end of the inclined rail 12 is provided with a hinged frame 44, and the hinged frame 44 comprises a first hinged rod 441 fixedly connected to the rear end of the flat rail 11, a hinged piece 442 connected to the rear end of the first hinged rod 441, and a second hinged rod 443 connected to the front end of the hinged piece 442, wherein the second hinged rod 443 is fixedly connected to the lower end of the inclined rail 12.

[0082] The rear support frame 4 is an adjusting support, which can conveniently adjust the inclination angle of the inclined rail 12 according to requirements. When the height of the telescopic rod 432 is adjusted, the locking knob 4332 is first loosened, and then the telescopic rod 432 is moved upward, the tooth grooves 4321 of the telescopic rod 432 are buckled with the clamping block 4341 of the buckle member 434, which can limit the telescopic rod 432 from continuing to move downward, the clamping block 4341 can be pried to move to the side by pressing the prying piece 4344, and then the telescopic rod 432 is moved downward by a certain distance, so that the height is adjusted step by step, and after the height is adjusted, the locking knob 4332 is tightened, so that the sliding block 4331 does not slide relative to the inclined rail 12. When the inclined rail 12 is adjusted in inclination angle, it is rotated around the hinged piece 442, and the docking plate 136 can change the curvature accordingly.

[0083] The specific use mode and effect of the embodiment are as follows:

[0084] In use, a plurality of gravity trolleys 5 are placed on the inclined rail 12 and blocked by the stop rod 221, then the rotating shaft 22 is rotated, and a plurality of gravity trolleys 5 are simultaneously started, and the start position sensor 24 is timed, and when the gravity trolley 5 reaches the end point, the end position sensor 31 at the corresponding position of each gravity trolley 5 measures the arrival time of the gravity trolley 5.

[0085] Embodiments of the present application are presented by way of example and description, and are not intended to be exhaustive or to limit the application to the form disclosed. Many modifications and variations will be apparent to those skilled in the art upon reading this disclosure. Embodiments are chosen and described in order to best explain the principles of the application and its practical application to thereby enable others skilled in the art to best utilize the application, various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. A gravity cart race track for teaching experiments, characterized in that: The utility model relates to a track structure and a track starting mechanism, and belongs to the field of track sports. The track structure comprises a straight track (11), an inclined track (12) arranged at one end of the straight track (11), and a plurality of arc-shaped tracks (13) connected at one end to the inclined track (12) and at the other end to the straight track (11), wherein the inclined track (12) forms an angle of alpha (0°< alpha < 90°) with the horizontal plane. The track starting mechanism comprises a starting support (21) fixedly connected to the inclined track (12), a rotating shaft (22) rotatably connected to the starting support (21), and a plurality of stop levers (221) fixedly arranged on the rotating shaft (22) and distributed along the axial direction of the rotating shaft (22), wherein the stop levers (221) are drivingly connected to a rotating mechanism. A plurality of gravity carts (5) are arranged side by side on the inclined track (12), and the gravity carts (5) are arranged behind the stop levers (221). A start position sensor (24) is arranged on the starting support (21) and can detect the rotating position of the rotating shaft (22), and a plurality of end position sensors (31) are arranged on an end support (3) arranged at the other end of the straight track (11), wherein the number of the end position sensors (31) is the same as that of the gravity carts (5) and each end position sensor (31) corresponds to one gravity cart (5), and each end position sensor (31) can detect the time when the corresponding gravity cart (5) reaches the end support (3). The straight track (11) and the inclined track (12) form one track unit (10) or are spliced by two or more track units (10), wherein the track unit (10) comprises a flat plate (103), side plates (101) arranged on both sides of the flat plate (103), and a plurality of guide protrusions (102) arranged transversely, wherein each guide protrusion (102) comprises two parallel protrusions (102a) for guiding the moving direction of the gravity cart (5). The arc-shaped track (13) is an arc-shaped connecting seat, which comprises a supporting portion (133), a track arc surface (134) fixedly connected to the upper portion of the supporting portion (133), and a plurality of guide rail portions (135) arranged transversely on the track arc surface (134), wherein the upper portion of each guide rail portion (135) is smoothly connected to the protrusion (102a) of the inclined track (12), the lower portion of each guide rail portion (135) is smoothly connected to the protrusion (102a) of the straight track (11), and the width of each guide rail portion (135) is the same as that of the protrusion (102a).

2. The gravity cart race track for teaching experiments of claim 1, wherein: The rotating mechanism is a steering wheel (23) drivingly connected to one end of the rotating shaft (22).

3. The gravity cart race track for teaching experiments of claim 1, wherein: The rotating mechanism is a handle (25) fixedly connected to one end of the rotating shaft (22).

4. The gravity cart race track for teaching experiments of claim 1, wherein: The rear side and lower portion of the inclined track (12) are connected to a rear support frame (4).

5. The gravity cart race track for teaching experiments of claim 4, wherein: The rear support frame (4) is a fixed support frame, which comprises a transverse support frame (41) fixedly connected with the lower end of the inclined track (12), and a longitudinal support frame (42) fixedly connected with the rear part of the lower end of the transverse support frame (41), and the upper part of the longitudinal support frame (42) is fixedly connected with the upper part of the inclined track (12).

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