CN204952255U - 8 word orbit carbon -free trolley - Google Patents

Abstract

The utility model discloses a carbon-free trolley with an "8" track, which is composed of a power conversion mechanism, a transmission mechanism, a steering mechanism and a vehicle frame. The utility model cleverly combines the transmission mechanism and the steering mechanism through a double gear (10) composed of a complete gear (10-2) and an incomplete gear (10-1), as shown in Figure 1. While providing continuous power to the traveling mechanism, it also provides intermittent power to the steering mechanism, which makes the whole vehicle very compact and greatly simplifies the mechanical structure of the trolley transmission and steering mechanism; using incomplete gears and crank connecting rods to realize Steering has the advantages of no need for winding and easy debugging; in addition, a power regulator is installed on the drive shaft, which solves the problem of smooth starting and smooth running of the trolley. The whole vehicle uses the principle of energy conversion to convert the gravitational potential energy of the heavy object into the kinetic energy of the trolley, so that the trolley can bypass obstacles by itself and move forward according to the "8" trajectory.

Description

A carbon-free trolley with figure 8 trajectory

technical field

The utility model relates to a trolley with a three-wheel structure, in particular to a carbon-free trolley walking on an "8" track.

Background technique

According to the requirements of the 4th National College Students' Comprehensive Engineering Ability Competition, a small car driven by gravity potential energy is designed. Don't bump into obstacles when playing, and don't fall off the table.

By analyzing the known data of the existing carbon-free competition car model, it has many not-so-perfect places. First of all, in the existing power conversion mechanism, the traction rope is directly wound on the equal-diameter drive shaft, and the starting torque of the trolley is much larger than its running torque, which is not conducive to the starting of the trolley, and it is also difficult to ensure the stability during its operation; Secondly, most of the steering mechanisms of "8" trolleys use crank rockers, cams or sheaves. Among them, both the crank rocker mechanism and the sheave have the disadvantage of quick return characteristics, which have a great impact on the stability of the trolley during operation; the cam can realize precise control, but the processing cost and difficulty are relatively high, and it is not convenient for trolley debugging and improvement. Finally, the processing cost of each part of the car is relatively high, and the weight of the whole car is too large, which does not meet the requirements of no carbon and low cost in the competition.

Contents of the invention

The object of the present invention is to design a mechanical device that can convert the gravitational potential energy into mechanical energy and drive the trolley to walk and turn according to the principle of energy conversion. When the self-propelled car is moving forward, it can bypass the obstacles set on the track by itself and realize the "8" figure track operation in a certain period.

The technical solution for realizing the above-mentioned utility model is: install bearing supports at the middle and rear positions of the vehicle frame, the driving shaft is located at the rear position of the vehicle frame, and the driven shaft is located at the middle position of the vehicle frame. At the same time, a power regulator is installed on the drive shaft. The steering of the trolley is realized by using the differential speed of the unilateral bearing. Install a heavy object support rod at the center of gravity of the vehicle, and install a fixed pulley on the top of the support rod. One end of the string bypasses the pulley and is fixedly connected to the driving shaft through a power regulator, and the other end is connected to the weight, so that the gravity of the weight The potential energy is converted into the turning torque for the trolley to move forward. The power transmission and automatic steering of the trolley are realized through the meshing of the gears on the main and driven shafts and the dual gears, so that the trolley can bypass obstacles by itself and realize the "8" figure trajectory forward according to a certain period.

The specific content is:

The transmission mechanism is composed of a pair of cylindrical spur gears, and the gravitational potential energy of the weight is converted into the kinetic energy of the trolley through the meshing of the gears. A power regulator is installed on the drive shaft, and different winding positions correspond to different driving torques. Simultaneously, the incomplete gear in the dual gear meshes with the gear in the steering mechanism, so that the continuously changing gravitational potential energy is intermittently converted into steering kinetic energy.

The steering mechanism is driven by the incomplete gear on the double gear, so that the crank connecting rod fixedly connected with the upper gear of the steering mechanism swings intermittently, and the driving connecting rod drives the front wheel to cross and swing intermittently, so that the trolley moves according to the A certain cycle realizes the "8" figure track operation.

The dolly proposed by the utility model has the following advantages:

(1) It can convert continuous gravitational potential energy into intermittent steering kinetic energy;

(2) The double gear greatly simplifies the mechanical structure of the trolley transmission and steering mechanism;

(3) Only the crank connecting rod is used to realize the steering, without winding wires, which is convenient for debugging;

(4) There is a power regulator on the driving shaft to ensure the smooth start and smooth operation of the trolley;

(5) Simple structure and small size.

Description of drawings

Figure 1 is a schematic diagram of the transmission mechanism

Figure 2 is a structural schematic diagram of the steering mechanism

Figure 3 is a schematic diagram of the assembly of the carbon-free trolley

In the figure 1. Drive wheel 2. Drive shaft deep groove ball bearing 3. Power regulator 4. Pinion 5. Drive shaft 6. Drive shaft deep groove ball bearing 7. Driven wheel 8. Drive shaft deep groove ball bearing 9. Driven shaft 10. duplex gear 11. gear 12. bottom plate 13. steering wheel front fork 14. steering wheel 15. rocking bar 16. connecting rod 17. crank 18. driven shaft deep groove ball bearing.

detailed description

As shown in Fig. 3, the carbonless trolley disclosed by the present invention cleverly combines the transmission mechanism and the steering mechanism through a double gear (10). Connect the full gear (10-2) on the duplex gear with the gear (4) on the driven shaft to provide continuous power. And the incomplete gear (10-1) is connected with the upper gear (11) of the steering mechanism to provide intermittent steering power. The car body is driven forward by a driving rear wheel (7), a driven rear wheel (1) assists in turning, and a front wheel (14) turns. At first, load onto two rear wheels on the square car body support (12). Secondly, install the power regulator (3) and bearings on the driving shaft (5) connected to the wheels at both ends, and then connect the gear (4) on the driving shaft (5) with the complete gear (10-2) on the transmission mechanism , the specific way is shown in Figure 1. And the incomplete gear (10-2) is meshed with the gear (11) in the steering mechanism for transmission, specifically as shown in Figure 2. Finally, install a support rod at a suitable position on the body and hang heavy objects to maintain balance.

Wherein the duplex gear (10) that connects the driving shaft and the steering mechanism is a combined gear that fixes a complete gear (10-2) and an incomplete gear (10-1) together to make them rotate synchronously. The continuous rotation of the rear wheels and the periodic and intermittent steering of the front wheels are respectively driven by the same continuous power, and the "8" figure trajectory is realized.

In the steering mechanism, the power transmitted by the gear drives the crank (17) in the crank connecting rod to make a circular motion, and the connection conversion between the connecting rod (16) and the rocker (15) is used to drive the front wheel (14) to turn left and right. Specifically as shown in Figure 2.

Claims (3)

1. A carbon-free trolley with a "8" track, which is composed of a power conversion mechanism, a transmission mechanism, a steering mechanism and a frame. Its characteristics are: a heavy support rod is installed on the frame, and a fixed pulley is installed on the top of the support rod One end of the string is connected to the weight, and the other end bypasses the pulley and connects the drive shaft (5) through the power regulator (3), and then connects the transmission mechanism and the steering mechanism through the gear (4) on the drive shaft so that the trolley can bypass obstacles by itself And according to a certain period to realize the "8" figure track forward. 2. A carbon-free trolley with a "8" track according to claim 1, characterized in that: the transmission mechanism uses the principle of energy conversion to convert the gravitational potential energy of the object into the kinetic energy of the trolley, and is equipped with wheels A power regulator (3) is installed on the driving shaft (5) of (1) to ensure the smooth start and smooth operation of the trolley, and to realize efficient utilization of energy. 3. A carbon-free trolley with a "8" track according to claim 1, characterized in that: the steering mechanism directly drives the front wheel (14) to turn by the crank connecting rod (15), and at the same time the double gear ( 10) The incomplete gear (10-1) in the steering mechanism meshes with the gear (11) in the steering mechanism to ensure that the trolley moves forward on the "8" track in a certain period.