Gravitational potential energy driven trolley

Abstract

The utility model discloses a gravitational potential energy driving trolley, which belongs to the field of carbon-free trolleys and comprises a frame, a rear axle and a driving shaft are rotatably connected onto the frame and parallel to each other, and rear wheels are mounted at two ends of the rear axle. A transmission assembly is arranged between the driving shaft and the rear wheel shaft; a gravitational potential energy driving assembly is arranged on the frame and used for driving the driving shaft to rotate; a steering mechanism is arranged at the front end of the frame, a fine adjustment assembly is arranged in the steering mechanism, and the fine adjustment assembly is used for adjusting the steering range; the moving direction of the trolley can be controlled through the steering mechanism, and the steering range of the trolley is adjusted by matching with the fine adjustment assembly, so that the trolley can circularly move in a double-8-shaped track.

Description

Technical Field

[0001] The utility model belongs to the field of carbon-free trolleys, and in particular relates to a carbon-free trolley driven by utilizing gravitational potential energy. Background Art

[0002] The carbon-free car driven by gravitational potential energy is a three-wheeled car with gravitational potential energy as its only energy source and a continuous obstacle avoidance function. With the improvement of people's awareness of energy conservation and environmental protection, the concept of carbon-free is increasingly being put forward as a research topic. The carbon-free car has gradually become a regional and even national mechanical innovation design competition.

[0003] The principle is to lift a heavy hammer to a specified height, and the heavy hammer falls down by itself under the action of gravity. The heavy hammer is connected to a flexible rope, and the direction of pulling force is changed through a movable pulley. The other end of the flexible rope is connected to the drive shaft of the trolley, converting potential energy into mechanical energy, thereby driving the trolley forward. At the same time, a steering mechanism is provided to realize the steering of the trolley.

[0004] Based on multiple engineering training and comprehensive ability competitions, the car needs to circle the three obstacle poles on the symmetry line of the table in an 8-shaped trajectory. Under the premise of multiple 8-shaped trajectories in competitions, we need to achieve a double 8 trajectory for the car. For this reason, the carbon-free car needs to have both periodic steering and the conversion of gravitational potential energy into kinetic energy. The design scheme of this type of car in the existing technology is not accurate enough in orientation, the forward trajectory is prone to deviation, and the number of detours around the obstacle poles also has room for improvement. Summary of the invention

[0005] The utility model aims to overcome the problems in the prior art that the orientation mode of the carbon-free trolley driven by gravity potential energy is unstable and the number of detours around obstacle piles is limited, and provides a trolley driven by gravity potential energy, which can complete more closed "8"-shaped obstacle pile detours and has more precise and stable steering orientation.

[0006] To achieve the above purpose, the embodiment of the utility model adopts the following technical solutions:

[0007] The utility model discloses a gravity potential energy driven trolley, comprising a frame, a gravity potential energy driving component, a rear wheel and a steering mechanism, wherein the frame is rotatably connected with a rear wheel shaft and a driving shaft, the driving shaft and the rear wheel shaft are arranged in parallel, and rear wheels are installed at both ends of the rear wheel shaft; the frame is provided with a gravity potential energy driving component for driving the driving shaft to rotate; a transmission component is arranged between the driving shaft and the rear wheel shaft; a steering mechanism is arranged at the front end of the frame; a crank rocker mechanism is arranged between the steering mechanism and the driving shaft, and when the driving shaft rotates, the crank rocker mechanism drives the steering mechanism to swing back and forth.

[0008] Preferably, the steering mechanism includes a front frame installed on the frame, and a vertical axis is rotatably connected inside the front frame; a front middle frame is also provided below the front frame, and the front middle frame is rotatably connected to the vertical axis, and a small wheel frame is fixedly connected to the lower end of the vertical axis, and a steering wheel is installed on the small wheel frame; a fine-tuning component is also provided in the steering mechanism, and the fine-tuning component is used to adjust the steering range.

[0009] Preferably, the crank rocker mechanism includes a crank block and a rocker installed at one end of the drive shaft, fisheye bearings are respectively provided at both ends of the rocker, and a first mounting rod with the same axial direction as the drive shaft is installed at the outer end of the crank block; a cross plate is installed at the side end of the front frame, and a second mounting rod is longitudinally provided on the cross plate; the fisheye bearings at both ends of the rocker are respectively connected and sleeved on the first mounting rod and the second mounting rod.

[0010] Preferably, the fine-tuning assembly includes a first adjustment plate installed on the side end of the small wheel frame, a second adjustment plate installed on the front center frame, and a differential head, the first adjustment plate is laterally provided with a threaded hole; the second adjustment plate and the first adjustment plate are arranged opposite to each other; the differential head is threadedly connected in the threaded hole, the first adjustment plate and the second adjustment plate are fastened by an elastic binding piece, and the differential head abuts against the second adjustment plate.

[0011] Preferably, the transmission assembly includes a main gear fixedly mounted on the drive shaft, and a sub-gear fixedly mounted on the rear wheel shaft, and the main gear and sub-gear are meshingly connected.

[0012] Preferably, the gravity potential energy driving component includes: four carbon rods longitudinally arranged on the frame, and the four carbon rods are diagonally distributed in a rectangular shape; a weight arranged between the four carbon rods, and a hook is provided on the weight; a winder mounted on the driving shaft, and the outer surface of the winder has a wire groove; and a pulley frame installed on the top of the four carbon rods, and a fixed ratio pulley is rotatably connected to the pulley frame; a driving wire is wound on the winder, and one end of the driving wire is wrapped around the fixed ratio pulley and connected to the hook of the weight.

[0013] Therefore, the technical solution of the utility model has the following beneficial effects:

[0014] (1) Using gravitational potential energy to drive the carbon-free car to turn and follow a closed "8"-shaped trajectory;

[0015] (2) The quick return characteristic of the crank rocker mechanism is utilized. When the crank block rotates at a constant speed, the angular velocity of the rocker swinging back and forth is different, so that it has a larger angular velocity when swinging back. When the car makes a double 8 motion around the pole, it can accelerate when turning right around the middle pole, so that the trajectory can maintain a stable acceleration state, so that more obstacle poles can be bypassed;

[0016] (3) The utility model provides a steering mechanism at the front end of the vehicle frame, and a fine-tuning component is provided in the steering mechanism. The fine-tuning component is used to adjust the steering range. The movement direction of the vehicle can be controlled by the steering mechanism, and the steering range of the vehicle can be adjusted in conjunction with the fine-tuning component, so that the vehicle can achieve circular motion along a precise "double 8"-shaped trajectory. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0018] Figure 2 It is a three-dimensional structural schematic diagram of the frame and steering mechanism of the utility model;

[0019] Figure 3 It is a three-dimensional structural schematic diagram of the frame and transmission assembly of the utility model;

[0020] Figure 4 It is a three-dimensional structural schematic diagram of the steering mechanism of the utility model;

[0021] Figure 5 It is a partial structural sectional view of the steering mechanism of the utility model;

[0022] Figure 6 It is a three-dimensional structural schematic diagram of the fine-tuning component in the steering mechanism of the utility model;

[0023] Figure 7 It is a three-dimensional structural schematic diagram of the vehicle frame and gravity potential energy driving assembly of the utility model.

[0024] Reference numerals: 1-frame; 11-rear wheel axle; 12-drive shaft; 13-rear wheel; 2-transmission assembly; 21-main gear; 22-secondary gear; 3-gravity potential energy drive assembly; 31-carbon rod; 32-weight; 321-hook; 33-winder; 331-line groove; 34-pulley frame; 35-fixed ratio pulley; 36-driving line; 4-steering mechanism; 41-fine-tuning assembly; 411-first adjusting plate; 4111-threaded hole; 412-second adjusting plate; 413-differential head; 414-elastic binding; 42-front frame; 43-vertical axis; 44-front middle frame; 45-small wheel frame; 451-steering wheel; 46-crank rocker mechanism; 461-crank block; 462-first mounting rod; 463-fisheye bearing; 464-cross plate; 465-second mounting rod; 466-rocker. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in combination with the specific embodiments of the utility model and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] The technical solutions provided by various embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0027] Reference Figures 1 to 7 As shown, the embodiment of the utility model provides a gravity potential energy driven vehicle, comprising a vehicle frame 1, a rear wheel shaft 11 and a driving shaft 12 are rotatably connected to the vehicle frame 1, the driving shaft 12 and the rear wheel shaft 11 are arranged in parallel, and rear wheels 13 are installed at both ends of the rear wheel shaft 11; a transmission assembly 2 is arranged between the driving shaft 12 and the rear wheel shaft 11, and the transmission assembly 2 includes a main gear 21 fixedly sleeved on the driving shaft 12, and a sub-gear 22 fixedly sleeved on the rear wheel shaft 11, and the main gear 21 and the sub-gear 22 are meshingly connected;

[0028] The frame 1 is provided with a gravity potential energy driving assembly 3 for driving the driving shaft 12 to rotate, and the gravity potential energy driving assembly 3 includes: four carbon rods 31 longitudinally arranged on the frame 1, and the four carbon rods 31 are diagonally distributed in a rectangular shape; a weight 32 arranged between the four carbon rods 31, and the weight 32 is provided with a hook 321; a winder 33 sleeved on the driving shaft 12, and the outer surface of the winder 33 has a wire groove 331, and the wire groove 331 is used to wind the driving wire 36; and a pulley frame 34 installed on the top of the four carbon rods 31, and a fixed ratio pulley 35 is rotatably connected to the pulley frame 34; ... The principle of the energy drive assembly 3 is that the gravity potential energy of the weight 32 is converted into the kinetic energy of the trolley. The fixed ratio pulley 35 is connected to the weight 32 and the winder 33 respectively by using a driving line 36, so as to achieve the purpose of overall energy transmission between the weight 32 and the trolley. The energy flows to the driving shaft 12 through the driving line 36 to drive the driving shaft 12 to rotate. The rear wheel shaft 11 and the rear wheel 13 are rotated through the transmission of the main gear 21 and the auxiliary gear 22 in the transmission assembly 2, so as to achieve the purpose of the trolley moving forward. The gear transmission has low energy consumption and high transmission efficiency, and the transmission ratio can be determined by numerical values, which is more accurate than other mechanisms.

[0029] A steering mechanism 4 is provided at the front end of the frame 1, and a fine-tuning component 41 is provided inside the steering mechanism 4. The fine-tuning component 41 is used to adjust the steering range. The movement direction of the trolley can be controlled by the steering mechanism 4, and the rotation range of the trolley can be adjusted in cooperation with the fine-tuning component 41, so that the trolley can realize a circular motion in a "double 8"-shaped trajectory.

[0030] Specifically, the steering mechanism 4 includes a front frame 42 mounted on the frame 1, and a vertical shaft 43 is rotatably connected inside the front frame 42; a front middle frame 44 is also provided below the front frame 42, and the front middle frame 44 is rotatably connected to the vertical shaft 43; a small wheel frame 45 is fixedly connected to the lower end of the axis, and a steering wheel 451 is installed on the small wheel frame 45; the fine-tuning component 41 can adjust the torsion angle between the front middle frame 44 and the small wheel frame 45; a crank rocker mechanism 46 for driving the front middle frame 44 to swing back and forth is also provided between the front middle frame 44 and the drive shaft 12;

[0031] The stability of the car is also of utmost importance during driving. At the beginning of the design, it was considered to place the steering wheel 451 in the middle so that the three wheels could generate almost the same pressure. After experiments, it was found that the steering wheel 451 could be offset to one side, which would make the car more stable and less likely to roll over during left and right turns. At the same time, a 1mm wide rear wheel 13 could be used to effectively reduce the contact between the wheel and the ground, thereby reducing friction.

[0032] The crank rocker mechanism 46 comprises a crank block 461 mounted at one end of the drive shaft 12, a first mounting rod 462 having the same axial direction as the drive shaft 12 is mounted on the outer end of the crank block 461, and a fisheye bearing 463 is mounted on the first mounting rod 462; a transverse plate 464 is mounted on the side end of the front center frame 44, a second mounting rod 465 is longitudinally arranged on the transverse plate 464, and a fisheye bearing 463 is also mounted on the second mounting rod 465; a rocker 466 is fixedly connected between the two fisheye bearings 463;

[0033] In this embodiment, since the friction loss of the crank rocker mechanism 46 is small and the structure is simple and easy to control the precision, we adopt the steering structure of the crank rocker, and rotate the drive shaft 12, thereby rotating the crank block 461, and the two ends of the rocker 466 are respectively connected to the crank block 461 and the front frame 44, so as to achieve the purpose of periodic reciprocating swing of the front frame 44;

[0034] The quick return characteristic of the crank rocker mechanism 46 is utilized. When the crank block 461 rotates at a constant speed, the angular velocity of the rocker 466 swinging back and forth is different, so that it has a larger angular velocity when swinging back. When the car makes a double 8 motion around the pile, it can accelerate when turning right around the middle pile, so that the trajectory can maintain a stable accelerated state, so that more piles can be bypassed.

[0035] Specifically, the fine-tuning assembly 41 includes: a first adjustment plate 411 installed at the side end of the small wheel frame 45, and a threaded hole 4111 is transversely provided on the first adjustment plate 411; a second adjustment plate 412 installed on the front middle frame 44, and the second adjustment plate 412 and the first adjustment plate 411 are arranged opposite to each other; and a differential head 413 threadedly connected in the threaded hole 4111, and the first adjustment plate 411 and the second adjustment plate 412 are fastened by being tied with an elastic binding piece 414, and the differential head 413 abuts against the second adjustment plate 412;

[0036] In this embodiment, a differential head 413 is added to the steering mechanism 4 of the trolley as a fine-tuning component 41. The rotating differential head 413 can adjust the distance between the first adjustment plate 411 and the second adjustment plate 412. The front center frame 44 can deviate to the left or right when it periodically reciprocates, which can drive the small wheel frame 45 to deviate to the left or right, thereby realizing the adjustment of the left and right steering of the trolley. The biggest advantage of using the differential head 413 as the fine-tuning component 41 is that the left and right steering can be accurately distributed to numerical adjustments, which can greatly reduce errors and speed up the fine-tuning speed of the trolley steering. It is an innovation in adjusting the steering range.

[0037] In summary, the use of aluminum profiles as the overall material of the trolley can make the trolley lighter and stronger. The profiles can also replace the bearing seats and directly cut out the bearing holes through wire cutting. In this way, the stability of the fixed bearings will be greatly improved compared to the bearing seats. At the same time, the profiles are more economical than printed parts and reduce the processing process, which is convenient for the disassembly and assembly of the trolley.

[0038] When testing the actual motion trajectory of the car, in order to achieve the expected predetermined trajectory, the transmission ratio of the main gear 21 and the auxiliary gear 22, the size of the rear wheel 13 and the left and right swing angles of the steering wheel 451 need to cooperate with each other to achieve the optimal standard; the ratio of the fixed ratio pulley 35 is also related to the vehicle speed, which needs to be maintained within a stable speed range. If the vehicle speed is too fast, it is easy to roll over or suddenly change, and if it is too slow, the vehicle is easy to stop at a turn, so it takes multiple experimental tests to select the most suitable fixed ratio pulley 35 ratio to ensure that the car performs double 8 motion around the rod.

[0039] In order to reduce the friction between the rear wheel 13 and the table, the whole is made of lighter aluminum alloy profiles as much as possible. The rear wheel 13 is made of plastic. Compared with organic glass, plastic has less friction and lighter weight. Other parts are made of 3D printed parts, which greatly reduces the weight of the car.

[0040] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A gravity potential energy driven vehicle, characterized in that: The vehicle comprises a frame (1), a gravitational potential energy drive assembly (3), a rear wheel (13) and a steering mechanism (4). The frame (1) is rotatably connected to a rear wheel axle (11) and a drive shaft (12); the drive shaft (12) and the rear wheel axle (11) are arranged in parallel; and rear wheels (13) are mounted on both ends of the rear wheel axle (11); The frame (1) is provided with a gravity potential energy driving component (3) for driving the driving shaft (12) to rotate; A transmission assembly (2) is provided between the drive shaft (12) and the rear wheel shaft (11); A steering mechanism (4) is provided at the front end of the vehicle frame (1); A crank-rocker mechanism (46) is provided between the steering mechanism (4) and the drive shaft (12); when the drive shaft (12) rotates, the crank-rocker mechanism (46) drives the steering mechanism (4) to swing back and forth.

2. A gravity potential energy driven vehicle according to claim 1, characterized in that: The steering mechanism (4) comprises a head frame (42) mounted on the vehicle frame (1), wherein the head frame (42) is rotatably connected to a vertical shaft (43) inside. A front middle frame (44) is also provided below the front frame (42), the front middle frame (44) is rotatably connected to the vertical shaft (43), a small wheel frame (45) is fixedly connected to the lower end of the vertical shaft (43), and a steering wheel (451) is mounted on the small wheel frame (45); A fine-tuning component (41) is also provided in the steering mechanism (4), and the fine-tuning component (41) is used to adjust the steering range.

3. A gravity potential energy driven vehicle according to claim 2, characterized in that: The crank rocker mechanism (46) comprises a crank block (461) and a rocker (466) mounted on one end of the drive shaft (12); fisheye bearings (463) are respectively provided at both ends of the rocker (466); a first mounting rod (462) having the same axial direction as the drive shaft (12) is mounted on the outer end of the crank block (461); a transverse plate (464) is mounted on the side end of the front center frame (44); a second mounting rod (465) is longitudinally provided on the transverse plate (464); The fisheye bearings (463) at both ends of the rocker (466) are respectively connected and sleeved on the first mounting rod (462) and the second mounting rod (465).

4. A gravity potential energy driven vehicle according to claim 2, characterized in that: The fine-tuning assembly (41) comprises a first adjustment plate (411) mounted on the side end of the small wheel frame (45), a second adjustment plate (412) mounted on the front center frame (44), and a differential head (413). A threaded hole (4111) is transversely provided on the first adjustment plate (411); the second adjustment plate (412) and the first adjustment plate (411) are arranged opposite to each other; the differential head (413) is threadedly connected in the threaded hole (4111); the first adjustment plate (411) and the second adjustment plate (412) are fastened by an elastic binding member (414); and the differential head (413) abuts against the second adjustment plate (412).

5. A gravity potential energy driven vehicle according to claim 1, characterized in that: The transmission assembly (2) comprises a main gear (21) fixedly sleeved on the drive shaft (12), and a sub-gear (22) fixedly sleeved on the rear wheel shaft (11), wherein the main gear (21) and the sub-gear (22) are meshingly connected.

6. A gravity potential energy driven vehicle according to claim 1, characterized in that: The gravitational potential energy driving component (3) comprises: Four carbon rods (31) are longitudinally arranged on the frame (1), and the four carbon rods (31) are diagonally distributed in a rectangular shape; A heavy hammer (32) is disposed between the four carbon rods (31), wherein a hook (321) is provided on the heavy hammer (32); A wire winder (33) sleeved on the drive shaft (12), wherein the outer surface of the wire winder (33) has a wire groove (331); and a pulley frame (34) mounted on the top of the four carbon rods (31), wherein a fixed ratio pulley (35) is rotatably connected to the pulley frame (34); A driving wire (36) is wound around the wire winder (33), and one end of the driving wire (36) is wound around a fixed ratio pulley (35) and connected to a hook (321) of a weight (32).

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