A mechanical experiment cart

Abstract

This invention relates to the field of mechanical experiment carts, and more particularly to a mechanical experiment cart, comprising a control box, a guide rail mounted on the lower part of one side of the control box, side plates fixedly connected to the front and rear sides of the top of the guide rail, a baffle fixedly connected to the side of the top of the guide rail away from the control box, a housing provided on the top of the guide rail, an expansion groove installed in the middle of the top of the housing, multiple counterweights provided on the inner side of the top of the expansion groove, magnetic coatings provided on the upper and lower parts of the counterweights, a wireless charging area provided in the middle of the bottom of the housing, and wheels mounted on the front and rear sides of both sides of the bottom of the housing. This invention allows for fine-tuning of the cart's center of gravity by adjusting the amount of counterweight liquid inside different sleeves, ensuring the center of gravity remains centered, thus maintaining the cart's stability and preventing the center of gravity from shifting, which could affect the cart's direction of travel and lead to inaccurate experimental results.

Description

Technical Field

[0001] This invention relates to the field of mechanical experiment carts, and more particularly to a mechanical experiment cart. Background Technology

[0002] Mechanics is an independent fundamental discipline that mainly studies energy and force, as well as their relationship with the equilibrium, deformation, or motion of solids, liquids, and gases. Mechanics can be roughly divided into three parts: statics, kinematics, and dynamics. Mechanics occupies a very large proportion in physics textbooks. When studying kinematics, experimental equipment is often used to help students understand the content in the textbook more intuitively. However, most existing experimental equipment has a relatively limited function. For example, existing mechanics experimental carts can only perform experiments on motion speed and cannot intuitively demonstrate the influence of various mechanical parameters on the effect, resulting in poor demonstration effects for students. At the same time, existing mechanics teaching demonstrations or experimental carts are poorly made and inaccurate in measurement. Therefore, we propose a mechanics experimental cart to solve the above-mentioned problems. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of the prior art by proposing a mechanical experiment cart.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a mechanics experiment cart, comprising a mechanics cart, the mechanics cart including a control box, a guide rail installed on the lower part of one side of the control box, side plates fixedly connected to the front and rear sides of the top of the guide rail, a baffle fixedly connected to the side of the top of the guide rail away from the control box, a housing provided on the top of the guide rail, an expansion groove installed in the middle of the top of the housing, multiple counterweights provided on the inner side of the top of the expansion groove, magnetic coatings provided on the upper and lower parts of the counterweights, a wireless charging area provided in the middle of the bottom of the housing, wheels installed on the front and rear sides of both sides of the bottom of the housing, the wheels being located inside the guide grooves, the guide grooves being opened on the front and rear sides of the middle of the top of the guide rail, a traction head installed on the side of the housing away from the control box, expansion holes being opened on the front and rear sides of the end of the housing near the traction head, and a liquid tank installed in the lower middle part of the housing.

[0005] Preferably, an input pipe is fixedly connected to both the front and rear sides of the bottom of the liquid tank. A pump body is fixedly connected to the end of the input pipe away from the liquid tank. An output pipe is fixedly connected to the output end of the pump body. A sleeve is fixedly connected to the end of the output pipe away from the pump body. An inner cavity is provided inside the sleeve. An inner cylinder is slidably connected inside the inner cavity. The end of the output pipe away from the pump body passes through the side wall of the sleeve and is located inside the inner cavity.

[0006] Preferably, a fixing plate is provided in the upper middle part of the housing, the top of the fixing plate is fixedly connected to the bottom of the expansion groove, a limiting groove is provided in the lower middle part of the fixing plate, a slider is slidably connected inside the limiting groove, a threaded rod is threaded through and threadedly connected to the middle of the slider, one end of the threaded rod passes through the fixing plate and the end of the housing and is fixedly connected to an adjustment knob, fixing blocks are fixedly connected to the lower front and rear ends of the slider, a rotating frame is rotatably connected inside the fixing block, a counterweight roller is rotatably connected to the outer periphery of the rotating frame away from the fixing block, and an end face gear is provided on one side of the fixing block.

[0007] Preferably, the upper front and rear ends of the fixed plate are provided with a circulating toothed belt, and both sides of the circulating toothed belt are provided with a transmission shaft. A driven bevel gear is fixedly connected to one side of the outer circumference of the transmission shaft, and a driving bevel gear is meshed with one side of the driven bevel gear. The driving bevel gear is fixedly connected to the outer circumference end of the rotating shaft, and the end of the rotating shaft away from the driving bevel gear is fixedly connected to the drive end of the servo motor.

[0008] Preferably, a control motherboard is installed on one side of the middle part of the housing, and multiple data interfaces are provided on one side of the bottom of the control motherboard. All data interfaces pass through the middle of one end of the housing, and the control motherboard is electrically connected to the control box.

[0009] Preferably, a wireless charging module is installed at the bottom of the housing, the wireless charging module is positioned directly above the wireless charging area, the wireless charging module is electrically connected to the control motherboard, and multiple sensors are installed on the inner side of the housing.

[0010] Preferably, the end face gears are all meshed and connected to one side of the gear ring, the end face gears are all rotatably connected to the outside of the limiting block, the limiting block is fixedly connected to both sides of the front and rear of the slider, and an electric push rod is rotatably connected to the upper middle part of the front and rear ends of the slider.

[0011] Preferably, each of the electric push rods has a driven gear fixedly connected to its outer periphery, the driven gears are meshed with the bottom of the circulating toothed belt, and each of the telescopic ends of the electric push rods has a toothed column fixedly connected to its telescopic end.

[0012] Preferably, the end of the rotating shaft away from the driving bevel gear passes through one side wall of the housing, the servo motor is installed in the upper middle part of one end of the housing, and both the driving bevel gear and the driven bevel gear are located inside the fixed plate.

[0013] Preferably, the wireless charging module is located on the lower side of the liquid tank, and the wireless charging module is located on the lower part of the control motherboard.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The guide grooves on the guide rail can guide and limit the wheels at the bottom of the trolley, preventing the trolley from deviating from the track during movement. The baffles and side plates can limit the guide rail, preventing the trolley from running off the track, which is conducive to the stability of the experiment. During the experiment, counterweights can be easily added to the trolley. The magnetic coating on the counterweights allows them to attract each other, making them stably set inside the expansion groove. This prevents the counterweights from easily slipping off during the movement of the trolley, which is conducive to the stability of the experiment.

[0016] During the trolley movement experiment, the counterweight liquid in the tank can be extracted by the pump. Then, the counterweight liquid can be delivered to each sleeve through the output pipe of the pump. By adjusting the amount of counterweight liquid in different sleeves, the center of gravity of the trolley can be finely adjusted so that the center of gravity of the trolley can be kept in the center position. This makes the trolley as stable as possible and avoids the center of gravity shifting, which would affect the direction of the trolley's movement and lead to inaccurate experimental results.

[0017] During the experiment, after adding counterweights to the trolley, people can rotate the threaded rod by adjusting the knob on one side of the trolley. The threaded rod can drive the slider to move along the limiting groove, which in turn can drive the counterweight rollers on both sides of the slider to move. The counterweight rollers can further adjust the center of gravity inside the trolley, so that the center of gravity of the trolley is not affected by the added counterweights. At the same time, people can observe the relationship between the center of gravity and the speed of the trolley, which is beneficial to practical use.

[0018] During the adjustment of the counterweight roller position, a servo motor drives a rotating shaft to rotate, which in turn drives a driving bevel gear to rotate synchronously. The driving bevel gear, in turn, drives a transmission shaft to rotate via a meshing driven bevel gear. This transmission shaft, in turn, drives a circulating toothed belt to rotate, which in turn drives a toothed ring to rotate synchronously via a driven gear and a toothed column. This, in turn, uses a meshing end face gear to deflect the rotating frame and the counterweight roller, allowing for the adjustment of the actual position of the counterweight roller. This makes the adjustment of the trolley's center of gravity smoother and effectively increases the adjustment range of the counterweight roller. Furthermore, this makes the experiment, which explores the relationship between the center of gravity and the trolley's speed, more operable and beneficial for practical use. Attached Figure Description

[0019] Figure 1 This is a frontal three-dimensional structural schematic diagram of a mechanical experiment cart according to the present invention;

[0020] Figure 2 This is a partial structural schematic diagram of a mechanical experiment cart according to the present invention;

[0021] Figure 3This is a top view schematic diagram of a partial structure of a mechanical experiment cart according to the present invention;

[0022] Figure 4 This is a bottom view schematic diagram of a partial structure of a mechanical experiment cart according to the present invention;

[0023] Figure 5 This is one of the schematic diagrams of a partial structure of the lower part of the shell of a mechanical experiment cart according to the present invention;

[0024] Figure 6 This is a second schematic diagram of a partial structure of the lower part of the shell of a mechanical experiment cart according to the present invention;

[0025] Figure 7 This is the third schematic diagram of a partial structure of the lower part of the shell of a mechanical experiment cart according to the present invention;

[0026] Figure 8 This is a partial structural diagram of the liquid tank of a mechanical experiment cart according to the present invention;

[0027] Figure 9 This is a partial structural diagram of the upper part of the shell of a mechanical experiment cart according to the present invention;

[0028] Figure 10 This is a partial structural diagram of the active bevel gear of a mechanical experiment cart according to the present invention;

[0029] Figure 11 This is a partial structural diagram of the driven bevel gear of a mechanical experiment cart according to the present invention;

[0030] Figure 12 This is a partial structural schematic diagram of the driven gear of a mechanical experiment cart according to the present invention;

[0031] Figure 13 This is a schematic diagram of the control system of a mechanical experiment cart according to the present invention.

[0032] 1. Mechanics cart; 101. Control box; 102. Guide rail; 103. Baffle; 104. Expansion slot; 105. Counterweight; 106. Guide channel; 107. Traction head; 108. Side plate; 109. Housing; 110. Walking wheel; 111. Expansion hole; 112. Wireless charging area; 113. Inner cylinder; 114. Control main board; 115. Pump body; 116. Output pipe; 117. Input pipe; 118. Liquid tank; 119. Wireless charging module; 120. Sleeve ; 121. Inner cavity; 122. Threaded rod; 123. Fixing plate; 124. Limiting groove; 125. Counterweight roller; 126. Circulating toothed belt; 127. Rotating frame; 128. Fixing block; 129. Servo motor; 130. Rotating shaft; 131. Transmission shaft; 132. End face gear; 133. Gear column; 134. Driving bevel gear; 135. Limiting block; 136. Gear ring; 137. Electric push rod; 138. Driven bevel gear; 139. Slider; 140. Driven gear. Detailed Implementation

[0033] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0034] like Figures 1-13The illustrated mechanical experiment cart includes a mechanical cart 1, which includes a control box 101. The control box 101 houses a sensor assembly, including sensors for motion displacement, velocity, acceleration, and an embedded force sensor (measuring the magnitude of tension and compression). It also includes built-in 3-axis (x, y, z) acceleration sensors and 3-axis (x, y, z) angular velocity sensors. A guide rail 102 is mounted on the lower side of one side of the control box 101. Side plates 108 are fixedly connected to the front and rear sides of the top of the guide rail 102. A baffle 103 is fixedly connected to the top of the guide rail 102 away from the control box 101. A housing 109 is mounted on the top of the guide rail 102. An expansion slot 104 is installed at the top center of the housing 109. Multiple counterweights 105 are installed on the inner side of the top of the expansion slot 104. Both the upper and lower parts of the counterweights 105 are coated with a magnetic coating. A wireless charging area 112 is located at the bottom center of the housing 109. Wheels 110 are installed on both sides of the bottom of the housing 109, front and rear. The wheels 110 use high-speed bearings, resulting in high idle speed, smooth movement, and low friction. The wheels 110 are all located inside guide slots 106, which are located on the front and rear sides of the top center of the guide rail 102. A traction head 107 is installed on the side of the housing 109 furthest from the control box 101. Expansion holes 111 are provided on both the front and rear sides of one end of the near-traction head 107. A control motherboard 114 is installed on one side of the middle section inside the housing 109. Multiple data interfaces are provided on one side of the bottom of the control motherboard 114, all of which pass through the middle of one end of the housing 109. The control motherboard 114 is electrically connected to the control box 101. A wireless charging module 119 is installed at the bottom inside the housing 109, positioned directly above the wireless charging area 112. The wireless charging module 119 is electrically connected to the control motherboard 114. Multiple sensors are installed on the inner edge of the housing 109. The vehicle has a built-in Bluetooth wireless module, enabling communication between the vehicle and the data center. The data acquisition terminal (computer, tablet, or mobile phone) connects directly via Bluetooth wireless module, facilitating data measurement during movement and data acquisition in various experimental environments. The sensor integrates multiple measurements, simultaneously measuring displacement, velocity, acceleration, and force. No data acquisition unit is required during use. The built-in sensor in the vehicle has a unique digital identification code, facilitating selective connection by the data terminal. It uses rechargeable lithium polymer batteries, requires no calibration, and is ready to use immediately. It can be set to automatic or manual zeroing via software. When in use, the sensor is powered on, but automatically shuts off when there is no connection or no activity, thus achieving high efficiency and energy saving.

[0035] Furthermore, in specific implementation and actual use, people can use the mechanical trolley 1 to conduct comparative experiments on mechanical performance. The traction head 107 can traction the main body of the trolley, the guide rail 102 can provide a smooth moving track for the trolley, the guide groove 106 on the guide rail 102 can guide and limit the walking wheels 110 at the bottom of the trolley to prevent the trolley from deviating from the track when moving, the baffle 103 and the side plate 108 can limit the guide rail 102 to prevent the trolley from rushing out of the guide rail 102, which is conducive to the stable conduct of the experiment. During the experiment, the counterweight 105 can be used to easily add counterweights to the trolley. The magnetic coating on the counterweight 105 can make the counterweight 105 adsorb to each other, so that the counterweight 105 can be stably set inside the expansion groove 104, so that the counterweight 105 will not easily slip off during the movement of the trolley, which is conducive to the stable conduct of the experiment.

[0036] The wireless charging module 119 is located on the lower side of the liquid tank 118 and on the lower part of the control motherboard 114. The bottom front and rear sides of the liquid tank 118 are fixedly connected to the input pipe 117. The end of the input pipe 117 away from the liquid tank 118 is fixedly connected to the pump body 115. The output end of the pump body 115 is fixedly connected to the output pipe 116. The end of the output pipe 116 away from the pump body 115 is fixedly connected to the sleeve 120. The sleeve 120 is provided with an inner cavity 121. The inner cavity 121 is slidably connected to the inner cylinder 113. The end of the output pipe 116 away from the pump body 115 passes through the side wall of the sleeve 120 and is located inside the inner cavity 121.

[0037] Furthermore, in specific implementation, the wireless charging module 119 enables the car to be wirelessly charged using the wireless charging area 112. During the car's movement experiment, the counterweight liquid in the liquid tank 118 can be extracted using the pump body 115. Then, the counterweight liquid can be delivered to each sleeve 120 through the output pipe 116 using the pump body 115. By adjusting the amount of counterweight liquid in different sleeves 120, the center of gravity of the car can be finely adjusted so that the center of gravity of the car can be kept in the center position, thereby making the car as stable as possible and avoiding the situation where the center of gravity shifts and affects the direction of the car's movement, resulting in inaccurate final experimental results.

[0038] A fixing plate 123 is provided in the upper middle part of the housing 109. The top of the fixing plate 123 is fixedly connected to the bottom of the expansion slot 104. A limiting groove 124 is provided in the lower middle part of the fixing plate 123. A slider 139 is slidably connected inside the limiting groove 124. A threaded rod 122 is threaded through and threadedly connected to the middle of the slider 139. One end of the threaded rod 122 passes through the fixing plate 123 and the end of the housing 109 and is fixedly connected to an adjustment knob. Fixing blocks 128 are fixedly connected to the lower front and rear ends of the limiting blocks 135. A rotating frame 127 is rotatably connected inside the fixing blocks 128. The rotating frame 127 is away from the fixing blocks 128. A counterweight roller 125 is rotatably connected to the outer periphery of a component. An end face gear 132 is provided on one side of a fixed block 128. The end face gears 132 are meshed with one side of a gear ring 136. The end face gears 132 are rotatably connected to the outside of a limiting block 135. The limiting blocks 135 are fixedly connected to both sides of the front and rear of a slider 139. An electric push rod 137 is rotatably connected to the upper middle part of the front and rear ends of a slider 139. A driven gear 140 is fixedly connected to the outer periphery of the electric push rod 137. The driven gears 140 are meshed with the bottom of a circulating toothed belt 126. A toothed column 133 is fixedly connected to the telescopic end of the electric push rod 137.

[0039] Furthermore, in specific implementation, during the experiment, after adding the counterweight 105 to the trolley, people can rotate the threaded rod 122 through the adjustment knob on one side of the trolley. The threaded rod 122 can drive the slider 139 to move along the limiting groove 124, thereby driving the counterweight rollers 125 on both sides of the slider 139 to move. The counterweight rollers 125 can further adjust the center of gravity inside the trolley, so that the center of gravity of the trolley will not be affected by the added counterweight 105. At the same time, people can observe the relationship between the center of gravity and the speed of the trolley, which is beneficial to practical use.

[0040] The fixed plate 123 is provided with a circulating toothed belt 126 at the upper part of both the front and rear ends. The circulating toothed belt 126 is provided with a transmission shaft 131 on both sides. A driven bevel gear 138 is fixedly connected to the middle of the outer periphery of one side of the transmission shaft 131. A driving bevel gear 134 is meshed with one side of the driven bevel gear 138. The driving bevel gear 134 is fixedly connected to the outer periphery of the rotating shaft 130. The end of the rotating shaft 130 away from the driving bevel gear 134 is fixedly connected to the driving end of the servo motor 129. The end of the rotating shaft 130 away from the driving bevel gear 134 passes through one side wall of the housing 109. The servo motor 129 is installed in the upper middle part of one end of the housing 109. The driving bevel gear 134 and the driven bevel gear 138 are both located inside the fixed plate 123.

[0041] Furthermore, in specific implementation, during the adjustment of the position of the counterweight roller 125, the servo motor 129 drives the rotating shaft 130 to rotate. The rotating shaft 130 drives the driving bevel gear 134 to rotate synchronously. The driving bevel gear 134, through its meshing driven bevel gear 138, drives the transmission shaft 131 to rotate. The transmission shaft 131 drives the circulating toothed belt 126 to rotate. The circulating toothed belt 126 drives the driven gear 140 to rotate. The driven gear 140 drives the electric push rod 137 to rotate synchronously. At this time, the electric push rod 137 drives the toothed column 133 to advance... The retraction of the toothed column 133 allows it to mesh with the inner side of the toothed ring 136. At this time, the toothed column 133 drives the toothed ring 136 to rotate synchronously. When the toothed ring 136 rotates, it drives the end face gear 132 meshing on one side to rotate. The rotation of the end face gear 132 drives the rotating frame 127 and the counterweight roller 125 to deflect, allowing people to adjust the actual position of the counterweight roller 125. This makes the adjustment of the center of gravity of the trolley smoother and effectively increases the adjustment range of the counterweight roller 125, making it more operable in the experiment to explore the relationship between the center of gravity and the speed of the trolley.

[0042] Working principle:

[0043] In practical use, the mechanical trolley 1 can be used to conduct comparative experiments on mechanical properties. The traction head 107 can pull the main body of the trolley, the guide rail 102 provides a smooth track for the trolley, and the guide groove 106 on the guide rail 102 guides and limits the wheels 110 at the bottom of the trolley, preventing the trolley from deviating from the track during movement. The baffle 103 and side plate 108 limit the guide rail 102, preventing the trolley from running off the guide rail 102, thus facilitating the stability of the experiment. During the experiment, the counterweights 105 allow for easy addition of weights to the trolley. The magnetic coating on the counterweights 105 allows them to attract each other, ensuring the counterweights 105 are stably positioned in the extension area. The interior of the tank 104 prevents the counterweight 105 from easily slipping off during the movement of the trolley, thus facilitating the stability of the experiment. The wireless charging module 119 allows the trolley to be wirelessly charged using the wireless charging area 112. During the trolley movement experiment, the counterweight liquid in the liquid tank 118 can be extracted using the pump 115, and then delivered to each sleeve 120 via the output pipe 116. By adjusting the amount of counterweight liquid in different sleeves 120, the center of gravity of the trolley can be finely adjusted, ensuring it remains centered and stable. This prevents the center of gravity from shifting, which could affect the trolley's direction of travel and lead to inaccurate experimental results. Meanwhile, during the experiment, after adding the counterweight 105 to the trolley, the threaded rod 122 can be rotated via the adjustment knob on one side of the trolley. The threaded rod 122 drives the slider 139 to move along the limiting groove 124, thereby moving the counterweight rollers 125 on both sides of the slider 139. The counterweight rollers 125 allow for further adjustment of the trolley's center of gravity, ensuring that the added counterweight 105 does not affect the center of gravity. This also allows for observation of the relationship between the center of gravity and the trolley's speed, which is beneficial for practical use. During the adjustment of the counterweight rollers 125, the servo motor 129 drives the rotating shaft 130 to rotate, which in turn drives the active bevel gear 134. The drive bevel gear 134, through its meshing driven bevel gear 138, drives the transmission shaft 131 to rotate. The transmission shaft 131 then drives the circulating toothed belt 126, which in turn drives the driven gear 140. The driven gear 140 then drives the electric push rod 137 to rotate synchronously. This causes the electric push rod 137 to retract the toothed column 133, allowing it to mesh with the inner side of the toothed ring 136. The toothed column 133 then drives the toothed ring 136 to rotate synchronously. When the toothed ring 136 rotates, it drives the end face gear 132, which meshes on one side, to rotate. The rotation of the end face gear 132 causes the rotating frame 127 and the counterweight roller 125 to deflect.This allows for adjustment of the actual position of the counterweight roller 125, making the adjustment of the trolley's center of gravity smoother. It also effectively increases the adjustment range of the counterweight roller 125, making the experiment more feasible in exploring the relationship between the center of gravity and the trolley's speed, thus facilitating practical use.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A mechanics experiment cart, comprising a mechanics cart (1), characterized in that: The mechanical trolley (1) includes a control box (101). A guide rail (102) is installed on the lower part of one side of the control box (101). Side plates (108) are fixedly connected to the front and rear sides of the top of the guide rail (102). A baffle (103) is fixedly connected to the side of the top of the guide rail (102) away from the control box (101). A housing (109) is provided on the top of the guide rail (102). An expansion slot (104) is installed in the middle of the top of the housing (109). Multiple counterweights (105) are provided on the inner side of the top of the expansion slot (104). Magnetic coatings are provided on the upper and lower parts of the counterweights (105). The housing (109) has a wireless charging area (112) at the bottom center. The housing (109) has wheels (110) installed on both sides of the bottom front and rear. The wheels (110) are all located inside the guide groove (106). The guide groove (106) is located at the top center front and rear sides of the guide rail (102). The housing (109) has a traction head (107) installed on the side away from the control box (101). The housing (109) has expansion holes (111) on both the front and rear sides of the end near the traction head (107). The housing (109) has a liquid tank (118) installed in the lower middle part of the housing (109). A fixing plate (123) is provided in the upper middle part of the housing (109). The top of the fixing plate (123) is fixedly connected to the bottom of the expansion groove (104). A limiting groove (124) is provided in the lower part of the fixing plate (123). A slider (139) is slidably connected inside the limiting groove (124). The slider (139) is fixedly connected to the lower front and rear ends of the slider (128). The fixed blocks (128) are rotatably connected to the rotating frame (127) inside. The outer periphery of the rotating frame (127) away from the fixed blocks (128) is rotatably connected to the counterweight roller (125). The fixed blocks (128) are provided with end face gears (132) on one side. The upper front and rear ends of the fixed plate (123) are provided with a circulating toothed belt (126). The circulating toothed belt (126) is provided with a transmission shaft (131) on both sides. A driven bevel gear (138) is fixedly connected to the middle of the outer periphery of one side of the transmission shaft (131). A driving bevel gear (134) is meshed with one side of the driven bevel gear (138). The driving bevel gear (134) is fixedly connected to the outer periphery of the rotating shaft (130). The end of the rotating shaft (130) away from the driving bevel gear (134) is fixedly connected to the drive end of the servo motor (129). The end face gears (132) are all meshed and connected to one side of the gear ring (136); Driven gears (140) are fixedly connected to the outer periphery of the electric push rod (137), and the driven gears (140) are meshed with the bottom of the circulating toothed belt (126). The telescopic ends of the electric push rod (137) are fixedly connected with toothed columns (133). The electric push rod (137) drives the toothed column (133) to retract, and the toothed column (133) meshes with the inner side of the toothed ring (136).

2. The mechanical experiment cart according to claim 1, characterized in that: The liquid tank (118) is fixedly connected to the front and rear sides of the bottom with an input pipe (117). The end of the input pipe (117) away from the liquid tank (118) is fixedly connected to a pump body (115). The pump body (115) is fixedly connected to an output pipe (116) at its output end. The end of the output pipe (116) away from the pump body (115) is fixedly connected to a sleeve (120). The sleeve (120) is provided with an inner cavity (121). The inner cavity (121) is slidably connected to an inner cylinder (113). The end of the output pipe (116) away from the pump body (115) passes through the side wall of the sleeve (120) and is located inside the inner cavity (121).

3. The mechanical experiment cart according to claim 1, characterized in that: A threaded rod (122) is threaded through and connected to the middle of the slider (139). One end of the threaded rod (122) passes through the fixing plate (123) and the end of the housing (109) and is fixedly connected to an adjustment knob.

4. The mechanical experiment cart according to claim 1, characterized in that: A control motherboard (114) is installed on one side of the middle part of the housing (109). Multiple data interfaces are provided on one side of the bottom of the control motherboard (114). All data interfaces pass through the middle of one end of the housing (109). The control motherboard (114) is electrically connected to the control box (101).

5. A mechanical experiment cart according to claim 4, characterized in that: A wireless charging module (119) is installed at the bottom of the housing (109). The wireless charging module (119) is located directly above the wireless charging area (112). The wireless charging module (119) is electrically connected to the control motherboard (114). Multiple sensors are installed on the inner side of the housing (109).

6. A mechanical experiment cart according to claim 1, characterized in that: The end face gears (132) are all rotatably connected to the outside of the limiting block (135), the limiting block (135) is fixedly connected to the front and rear sides of the slider (139), and the upper middle part of the front and rear ends of the slider (139) is rotatably connected to an electric push rod (137).

7. A mechanical experiment cart according to claim 1, characterized in that: The end of the rotating shaft (130) away from the active bevel gear (134) passes through one side wall of the housing (109). The servo motor (129) is installed in the upper middle part of one end of the housing (109). The active bevel gear (134) and the driven bevel gear (138) are both located inside the fixed plate (123).

8. A mechanical experiment cart according to claim 5, characterized in that: The wireless charging module (119) is located on the lower side of the liquid tank (118) and the wireless charging module (119) is located on the lower part of the control motherboard (114).

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