CN107029434B - A carbon-free car that follows the "8" track - Google Patents

Abstract

The invention discloses a carbon-free trolley with an "8"-shaped track, which adopts a steering mechanism composed of a cam-steering rack-driver gear to realize the steering control of the vertical shaft of the front wheel, and has a reasonable structure and high transmission precision; At the same time, the front wheel mechanism of this carbon-free trolley has a position-adjustable function. By adjusting the differential head of the front wheel mechanism, the position of the front wheel can be adjusted precisely at the micron level. Through the differential head mechanism and the cam‑‑steering rack‑‑ The transmission gear and the steering mechanism are matched and adjusted to realize the calibration of the entire steering mechanism to ensure that the running track of the trolley conforms to the precise "8"-shaped track; It is composed of multiple layers of winding wheels with different diameters. When winding, by rewinding several large wheels, it can effectively avoid the situation that the trolley stops during operation.

Description

A carbon-free car that follows the "8" track

technical field

The invention belongs to the technical field of carbon-free trolleys, and in particular relates to a carbon-free trolley following an "8"-shaped track.

Background technique

The carbon-free car is a kind of energy that does not need to consume fuel and battery storage. It only relies on the mechanical potential energy generated during the falling of the heavy hammer to generate power and drive the car. The production topic usually requires a given gravitational potential energy. According to the principle of energy conversion, design a mechanical device that can convert the gravitational potential energy into mechanical energy and can be used to drive the car to walk and turn, so that the car can automatically avoid the race when it is moving forward. Obstacles on the road.

The automatic walking "8" figure track car is the competition proposition of the National College Students Engineering Training Comprehensive Ability Competition. It is required to design a car that can automatically walk the "8" figure track under the premise of given gravitational potential energy. The existing carbon-free trolleys have complex structures, difficult processing, and relatively high costs; some adjustment accuracy is not very high, resulting in inaccurate trolley running tracks; Also increased the loss of energy, making it impossible to complete the game.

Contents of the invention

The object of the present invention is to overcome the deficiencies of the prior art, and provide a carbon-free trolley that follows an "8"-shaped track.

The present invention is achieved through the following technical solutions:

A carbon-free trolley following an "8"-shaped trajectory, including a frame, a driving mechanism arranged on the frame for driving the rear wheels, and a steering mechanism for controlling the steering of the front wheels;

The front end of the vehicle frame is provided with a position-adjustable front wheel mechanism, which includes a front wheel fixed bracket, a front wheel movable bracket, a vertical shaft, a front wheel fork and a front wheel, and the front wheel fixed bracket is fixed on the vehicle frame. The front wheel mobile support is connected with the front wheel fixed support through two polished rods and a differential head, the vertical shaft is arranged in the front wheel mobile support through the rotation of the axle sleeve, and the bottom end of the vertical shaft is installed with the front wheel through the front wheel yoke; the differential head, The polished rods are arranged in parallel, and the differential head is located at the center of the two polished rods. By adjusting the differential head, the distance between the front wheel moving bracket and the front wheel fixed bracket can be adjusted, and then the position adjustment of the vertical shaft, the front wheel fork and the front wheel can be adjusted; The vertical shaft is covered with a transmission gear, which drives the vertical shaft to rotate by driving the transmission gear, and then realizes that the vertical shaft drives the front wheels to turn;

The rear end of the vehicle frame is provided with a rear axle, and rear wheels are installed at both ends of the rear axle, and a differential is arranged on the rear axle.

A driving shaft is arranged on the vehicle frame, and a coiling tower wheel and a driving driving gear are fixedly installed on the driving shaft. The driving driving gear meshes with the driven gear of the differential on the rear wheel shaft, and the potential energy block is bypassed by a flexible rope. The fixed pulley is connected with the winding tower wheel, and the potential energy block drives the winding tower wheel and the driving shaft to rotate through the flexible rope when the potential energy block falls, and provides driving force for the driving shaft; The transmission constitutes the driving mechanism for driving the rear wheels. When the potential energy block drives the driving shaft to rotate, the driving driving gear on the driving shaft drives the rear wheel shaft to rotate through the differential to realize the driving of the rear wheels;

One end of the driving shaft is also fixedly provided with a steering driving gear, which is meshed with a steering driven gear, and the steering driven gear is connected to a cam through a rotating shaft, and the cam is connected to one end of the steering rack, and the steering rack is horizontal Slidingly arranged on the support plate on the vehicle frame, the other end of the steering rack meshes with the transmission gear on the vertical shaft of the front wheel mechanism, the steering driving gear, steering driven gear, rotating shaft, cam, steering rack and vertical shaft The driving gear constitutes the steering mechanism that controls the steering of the front wheels. When the driving shaft is running, the steering driving gear drives the steering driven gear to move, and the steering driven gear drives the cam to rotate synchronously through the rotating shaft. The cam drives the rack to move back and forth, and the front end of the rack passes The transmission gear drives the vertical shaft to rotate, so as to realize the steering of the front wheels, and through the special-shaped track of the cam, the trolley walks out of the "8"-shaped track during the traveling process.

In the above technical solution, a vertical cylinder is vertically arranged on the vehicle frame, a fixed pulley is arranged on the top of the vertical cylinder through a bracket, and a potential energy block is arranged in the vertical cylinder; an opening for putting the potential energy block is provided on the wall of the vertical cylinder.

In the above technical solution, the cam has a circle of special-shaped contours for controlling the movement track of the trolley, and the end of the steering rack is provided with a roller, and the rollers of the steering rack are rollingly matched with the special-shaped contour of the cam.

In the above technical solution, the support plate is composed of two vertical plates, four rollers are installed between the two vertical plates, and the steering rack is installed between the two vertical plates by horizontal sliding of the four rollers, and the steering rack Two rollers are respectively installed on the upper and lower sides of the steering rack to ensure that the steering rack can slide horizontally along its length.

In the above technical solution, the winding cone is composed of multiple layers of winding wheels with different diameters.

In the above technical solution, the winding tower wheel includes a first layer of winding wheels with a diameter of 10mm, a second layer of winding wheels with a diameter of 15mm, a third layer of winding wheels with a diameter of 20mm, and a fourth layer of winding wheels with a diameter of 25mm. Layer winding wheel, the fifth layer winding wheel with a diameter of 30mm; Then wind a few turns of the third layer winding wheel with a diameter of 20mm, then directly wind a few turns of the fifth layer winding wheel of 30mm across the fourth layer winding wheel with a diameter of 25mm, and then wind a few turns of the fourth layer of 25mm The reel, and finally a few turns of the 30mm fifth layer reel.

Advantage of the present invention and beneficial effect are:

The invention adopts the steering mechanism composed of cam-steering rack-transmission gear to realize the steering control of the vertical shaft of the front wheel. By adjusting the differential head of the front wheel mechanism, the position of the front wheel can be adjusted precisely at the micron level. Through the differential head mechanism and the cam-steering rack-transmission gear steering mechanism, the calibration of the entire steering mechanism is realized. To ensure that the running track of the trolley conforms to the precise "8" track;

The present invention adopts a unique winding tower wheel, which is composed of multiple layers of winding wheels with different diameters. When winding the wire, it effectively prevents the trolley from running during the running process by rewinding the large wheel several times. In addition, compared with the traditional tapered surface winding shaft, firstly, if the winding shaft with tapered surface is used, the rope will often slide down, but the use of the cone wheel can avoid this problem; there is also the use of For winding shafts with tapered surfaces, the diameter and position of each winding cannot be accurate. If the diameter and position of each winding are different, it will also affect the track of the trolley; and the use of tower wheels can accurately wind each time. The diameter position of the line is beneficial to the adjustment of the trolley track.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

FIG. 2 is an enlarged view of FIG. 1 .

Fig. 3 is a structural schematic diagram of another perspective of the present invention.

Fig. 4 is a schematic structural view of the present invention without the front wheel fixing bracket and the front wheel moving bracket.

Fig. 5 is a schematic structural view of the winding cone of the present invention.

Detailed ways

The technical solutions of the present invention will be further described below in conjunction with specific embodiments.

A carbon-free trolley following an "8" track, comprising a vehicle frame, a driving mechanism arranged on the vehicle frame for driving the rear wheels, and a steering mechanism for controlling the steering of the front wheels.

The frame 1 is vertically provided with a vertical tube 2, the top of the vertical tube is provided with a fixed pulley 4 through a bracket 3, and a potential energy block is arranged in the vertical tube; the vertical tube wall is provided with an opening 5 for putting in a potential energy block;

The front end of vehicle frame is provided with front wheel mechanism, and front wheel mechanism comprises front wheel fixed support 6, front wheel movable support 7, vertical shaft 8, front wheel fork frame 9 and front wheel 10, and front wheel fixed support 6 is fixed on the vehicle frame 1 , the front wheel mobile support 7 is connected with the front wheel fixed support 6 through two polished rods 11 and a differential head 12, the vertical shaft 8 is arranged in the front wheel mobile support 7 through the rotation of the axle sleeve, and the bottom end of the vertical shaft is installed through the front wheel fork 9 Front-wheel 10 (front-wheel is installed on the front-wheel fork frame, and front-wheel fork frame is fixed with vertical shaft bottom); Described differential head, polished rod are arranged in parallel, and differential head 12 is positioned at the center of two polished rods 11, by adjusting differential head Realize adjusting the distance between the front wheel moving bracket and the front wheel fixed bracket, and then adjust the position adjustment of the vertical shaft 8, the front wheel fork frame 9 and the front wheel 10; the vertical shaft 8 is sleeved with a transmission gear 26, and by driving the transmission gear 26 Drive the vertical shaft 8 to rotate, and then realize the vertical shaft 8 to drive the front wheels to turn;

The rear end of vehicle frame is symmetrically arranged with left and right two rear wheel supports 13, and rear wheel shaft 14 is installed by bearing on the two rear wheel supports, and two rear wheels 15 of carbon-free trolley are installed at the rear wheel shaft two ends; provided with a differential 16,

The vehicle frame is also provided with a drive shaft 17, on the drive shaft 17, a winding cone wheel 18 and a drive drive gear 19 are fixedly installed, and the drive drive gear 19 is meshed with the driven gear of the differential on the rear axle, so The potential energy block bypasses the fixed pulley and is connected with the winding tower wheel through a flexible rope. When the potential energy block falls, the flexible rope drives the winding tower wheel and the driving shaft to rotate, providing driving force for the driving shaft; The differential gear 16 on the driving driving gear 19 and the rear wheel shaft constitutes the driving mechanism for driving the rear wheel to advance. wheel drive.

One end of driving shaft is also fixedly provided with turning to driving gear 20, and this turning to driving gear meshes with a steering driven gear 21, and steering driven gear 21 connects a cam 23 by rotating shaft 22, and cam is connected with an end of steering rack 24 ( Described cam 23 has the special-shaped contour 23-1 that is used to control dolly track in a circle, and the end of steering rack is provided with roller, and the roller of steering rack is rollingly matched with the special-shaped contour of cam), and described steering rack is horizontal Slidingly arranged on the support plate 25 on the vehicle frame (the support plate 25 is made up of two parallel vertical plates, four rollers are installed between the two vertical plates, and the steering rack is installed on the horizontal slide by four rollers. Between the two vertical plates, two rollers are respectively installed on the upper and lower sides of the steering rack to ensure that the steering rack can slide horizontally along its length), the other end of the steering rack and the transmission on the vertical shaft 8 of the front wheel mechanism Gear 26 meshes; Described steering driving gear 20, steering driven gear 21, rotating shaft 22, cam 23, steering rack 25, transmission gear 26 on the vertical shaft constitute the steering mechanism that controls the steering of the front wheels. The gear drives the steering driven gear to move. The steering driven gear drives the cam to rotate synchronously through the rotating shaft. The cam drives the rack to move back and forth. track, so that the trolley walks out of the "8"-shaped track during its travel.

In order to ensure that the running track of the trolley conforms to the precise "8"-shaped track, it is necessary to adjust the differential head of the front wheel mechanism to precisely adjust the accuracy of the entire steering mechanism; when adjusting, first determine the initial position of the cam (that is, determine the steering rack starting position), and then adjust the differential head to keep the front wheels in a straight state.

Described winding cone wheel 18 is made up of the winding wheel of multi-layer different diameter, and in the present embodiment, winding cone wheel 18 comprises the first layer of winding wheel a, diameter The second layer of winding reel b with a diameter of 15mm, the third layer of winding reel c with a diameter of 20mm, the fourth layer of winding reel d with a diameter of 25mm, and the fifth layer of winding reel e with a diameter of 30mm. When winding the wire, first wind a few turns of the first layer of winding wheel a with a diameter of 10mm, then wind a few turns of the second layer of winding wheel b with a diameter of 15mm, and then wind a few turns of the third layer of winding wheel with a diameter of 20mm c, then step over the 25mm-diameter fourth-layer winding wheel d and directly wind a few turns of the 30mm fifth-layer winding wheel e, then wind a few turns of the 25mm fourth-layer winding wheel d, and finally wind a few turns of 30mm The fifth layer of winding reel e. The purpose of such winding is: because the trolley is walking, due to the friction and air resistance, the weight drops to a certain distance, and the trolley stops (this is because when the weight falls to a certain distance, the trolley stops When the running track of the trolley is at a sharp turning point, the frictional resistance between the wheel and the ground and the frictional resistance of the transmission mechanism will increase. At this time, the speed of the trolley and the falling speed of the potential energy block are low, so the frictional resistance will be greater than the momentum of the potential energy block at this time. and the momentum of the trolley, causing the trolley to stop), so by rewinding the big wheel a few times, the trolley is wound on the big wheel at the stop position, so that the trolley will have a greater driving force, driving the trolley to walk forward.

In addition, compared with the traditional conical reel, firstly, if the conical reel is used, the rope will often slide down, but the use of the cone wheel avoids this problem. In addition, if the winding shaft with a tapered surface is used, the diameter and position of each winding can not be accurate. If the diameter and position of each winding are different, it will also affect the track of the trolley; The diameter position of the wire can be precisely wound, which is beneficial to the adjustment of the trolley track.

The present invention has been described as an example above, and it should be noted that, without departing from the core of the present invention, any simple deformation, modification or other equivalent replacements that can be made by those skilled in the art without creative labor all fall within the scope of this invention. protection scope of the invention.

Claims (3)

1. The utility model provides a walk carbonless dolly of "8" font orbit, includes the frame and sets up the actuating mechanism that is used for driving the rear wheel and marchs, is used for controlling the steering mechanism that the front wheel turned, its characterized in that on the frame:

the front end of the frame is provided with a front wheel mechanism with adjustable position, the front wheel mechanism comprises a front wheel fixing support, a front wheel moving support, a vertical shaft, a front wheel fork and a front wheel, the front wheel fixing support is fixed on the frame, the front wheel moving support is connected with the front wheel fixing support through two polished rods and a differential head, the vertical shaft is rotatably arranged in the front wheel moving support through a shaft sleeve, and the bottom end of the vertical shaft is provided with the front wheel through the front wheel fork; the differential head and the polish rods are arranged in parallel, the differential head is positioned at the centers of the two polish rods, the distance between the front wheel moving support and the front wheel fixing support is adjusted by adjusting the differential head, and the position adjustment of the vertical shaft, the front wheel fork and the front wheel is further adjusted; a transmission gear is sleeved on the vertical shaft, and the vertical shaft is driven to rotate by driving the transmission gear, so that the vertical shaft drives the front wheel to steer;

the rear end of the frame is provided with a rear wheel shaft, the two ends of the rear wheel shaft are provided with rear wheels, a differential mechanism is arranged on the rear wheel shaft,

the frame is provided with a driving shaft, a winding cone pulley and a driving gear are fixedly mounted on the driving shaft, the driving gear is meshed with a driven gear of a differential mechanism on a rear wheel shaft, a potential energy block is connected with the winding cone pulley by winding a fixed pulley through a flexible rope, and the winding cone pulley and the driving shaft are driven to rotate through the flexible rope when the potential energy block falls down to provide driving force for the driving shaft; the driving shaft, the driving gear on the driving shaft and the differential on the rear wheel shaft form a driving mechanism for driving the rear wheel to move forward, and when the potential energy block drives the driving shaft to rotate, the driving gear on the driving shaft drives the rear wheel shaft to rotate through the differential, so that the rear wheel is driven;

a steering driving gear is fixedly arranged at one end of a driving shaft and is meshed with a steering driven gear, the steering driven gear is connected with a cam through a rotating shaft, the cam is connected with one end of a steering rack, the steering rack is horizontally and slidably arranged on a supporting plate on a frame, the other end of the steering rack is meshed with a transmission gear on a vertical shaft of a front wheel mechanism, the steering driving gear, the steering driven gear, the rotating shaft, the cam, the steering rack and the transmission gear on the vertical shaft form a steering mechanism for controlling the steering of the front wheel, when the driving shaft operates, the steering driving gear drives the steering driven gear to move, the steering driven gear drives the cam to synchronously rotate through the rotating shaft, the cam drives the rack to move back and forth, and the front end of the rack drives the vertical shaft to rotate through a transmission gear, so that the steering of the front wheel is realized;

the cam is provided with a circle of special-shaped outline for controlling the movement track of the trolley, the end part of the steering rack is provided with a roller, and the roller of the steering rack is in rolling fit with the special-shaped outline of the cam;

the winding cone pulley consists of a plurality of layers of winding wheels with different diameters;

the supporting plate is composed of two vertical plates, four idler wheels are installed between the two vertical plates, the steering rack is installed between the two vertical plates through the four idler wheels in a horizontal sliding mode, and the two idler wheels are installed on the upper surface and the lower surface of the steering rack respectively so that the steering rack can horizontally slide along the length direction of the steering rack.

2. The carbon-free trolley with the 8-shaped track as claimed in claim 1, wherein: a vertical cylinder is vertically arranged on the frame, a fixed pulley is arranged at the top end of the vertical cylinder through a bracket, and a potential energy block is arranged in the vertical cylinder; an opening for placing the potential energy block is arranged on the wall of the vertical cylinder.

3. The carbon-free trolley with the 8-shaped track as claimed in claim 1, wherein: the winding cone wheel comprises a first layer winding wheel with the diameter of 10mm, a second layer winding wheel with the diameter of 15mm, a third layer winding wheel with the diameter of 20mm, a fourth layer winding wheel with the diameter of 25mm and a fifth layer winding wheel with the diameter of 30 mm; when winding, firstly, a plurality of circles of first layer reels with the diameter of 10mm are wound, then a plurality of circles of second layer reels with the diameter of 15mm are wound, then a plurality of circles of third layer reels with the diameter of 20mm are wound, then a plurality of circles of fifth layer reels with the diameter of 30mm are directly wound by crossing over the fourth layer reels with the diameter of 25mm, then a plurality of circles of fourth layer reels with the diameter of 25mm are wound, and finally a plurality of circles of fifth layer reels with the diameter of 30mm are wound.

Images