CN215495685U

CN215495685U - Adjustable 8-shaped track Stirling trolley based on cam

Info

Publication number: CN215495685U
Application number: CN202121746275.1U
Authority: CN
Inventors: 崔希澎; 宋清源; 石忠玉; 孙茜
Original assignee: Southwest Petroleum University
Current assignee: Southwest Petroleum University
Priority date: 2021-07-29
Filing date: 2021-07-29
Publication date: 2022-01-11
Anticipated expiration: 2031-07-29

Abstract

The utility model relates to an adjustable 8-shaped track Stirling trolley taking ethanol as energy and based on a cam, which mainly comprises a positioning sleeve, a Stirling engine, a trolley shell, the cam, a cam shaft sleeve, a swing rod, a deep groove ball bearing on an outer ring of a flange, a front fork, a front wheel, a first gear, an M3 bolt, a shaft sleeve, a front shaft, a third gear, a second gear, a middle shaft, a fourth gear, a driven wheel shaft sleeve, a rear wheel, a bearing pin, a rear shaft, a belt wheel shaft, a belt, a second belt wheel, a first belt wheel, a deep groove ball bearing, a positioning ring, an M3 nut and a set screw. The Stirling trolley can adjust the advancing direction of the trolley through the cam, and the purpose of passing through different roughness fields and different distance barriers is achieved. Based on the requirement of the event, the trolley can improve the fault tolerance rate and the track repeatability by changing the transmission ratio of the gear and the belt wheel or changing the shape of the cam, so as to drive more 8-shaped tracks.

Description

Adjustable 8-shaped track Stirling trolley based on cam

Technical Field

The utility model relates to an adjustable 8-shaped track Stirling trolley based on a cam for teaching.

Background

With the development of science and technology and the improvement of energy conservation and environmental protection consciousness of people, ethanol is used as a new clean energy source to be a research topic. The Stirling trolley is a new vehicle model for engineering training comprehensive ability competition of college students in China, and 4 ml of ethanol is used as unique energy to continuously avoid obstacles and complete a preset track. The design difficulty of the Stirling trolley is as follows: 1. the energy conversion rate is too high, so that the running speed of the trolley is too high, and the preset track is difficult to complete; 2. generally, the weight of the car body is heavier, the space structure is larger, and the car body is difficult to start and is easy to collide with obstacles during a match. When the track is designed according to the difficulties, the number of the parts avoidable on the track is reduced as much as possible, and the space structure of the track is adjusted to adapt to tracks with obstacles at different intervals.

SUMMERY OF THE UTILITY MODEL

The purpose of the utility model is: the adjustable 8-shaped track Stirling trolley based on the cam is provided, and the stable 8-shaped track of the Stirling trolley is realized through motion transmission in the cam mechanism and the transmission mechanism.

This patent adopts following technical scheme to realize: the main structure of the device comprises a prime mechanism, a cam mechanism, a gear transmission mechanism, a belt wheel transmission mechanism, a steering mechanism and an actuating mechanism. The general parts of the device comprise a positioning sleeve, a Stirling engine, a vehicle shell, a cam shaft sleeve, a swing rod, a flange outer ring deep groove ball bearing, a front fork, a front wheel, a first gear, an M3 bolt, a shaft sleeve, a front shaft, a third gear, a second gear, a middle shaft, a fourth gear, a driven wheel shaft sleeve, a rear wheel, a bearing pin, a rear shaft, a belt wheel shaft, a belt, a second belt wheel, a first belt wheel, a deep groove ball bearing, a positioning ring, an M3 nut and a set screw. The structural features are distributed over six mechanisms.

1. A steering mechanism: the front wheel and the front fork are fixed through two deep groove ball bearings; the front fork is assembled on the vehicle shell through two flange outer ring deep groove ball bearings; the swing rod is connected with the swing rod sleeve through threads; the swing rod sleeve is connected with the front fork through an M3 bolt, and when the side face of the bicycle shell is required to be vertical to the axis of the front axle, the axis of the swing rod is parallel to the axis of the front axle; the swing rod can freely rotate in the horizontal plane, when the trolley runs, the swing rod and the cam are pre-tightened through the rubber band, the swing rod is guaranteed to be in contact with the cam at all times, the swing rod is driven to swing along with the rotation of the cam, the front wheel is immediately driven to swing, and the running route of the trolley is controlled.

2. The gear transmission mechanism comprises: the front shaft, the middle shaft and the rear shaft are assembled on the vehicle shell through deep groove ball bearings on outer rings of the flanges, the outer rings of the bearings are assembled on the inner side of the vehicle shell, and the bearings are axially positioned through positioning sleeves; the shaft sleeve is assembled with the first gear through an M3 bolt, is assembled on the left side of the front shaft through an M3 bolt, and is axially positioned through a positioning ring; the gear two-way is fixed on the left side of the middle shaft through a set screw. The third gear is the same as the first gear in processing method and is positioned at the position fixed at the left side of the middle shaft; and the gear four and the gear two are fixed at the left end of the rear shaft in the same processing method. The two-stage transmission structure with two pairs of gears meshed respectively is adopted, so that the space is saved, the large transmission ratio can be used, the energy utilization rate is improved, and the running time of the trolley is longer.

3. A cam mechanism: the cam is assembled with the cam shaft sleeve through an M3 bolt and an M3 nut; the cam shaft sleeve is fixed on the right side of the front shaft through an M3 bolt, and is axially positioned through a positioning ring; the curvature and size of the 8-shaped track can be optimized by rotationally adjusting the profile shape of the cam and the radius size of each arc.

4. An executing mechanism: the rear wheel on the right side is connected with the shaft sleeve through an M3 bolt, the belt pulley I and the shaft sleeve are assembled on the right side of the rear shaft through an M3 bolt, and the positioning ring is used for axially positioning; the left rear wheel is connected with a driven wheel shaft sleeve through an M3 bolt, is assembled on the leftmost side of the rear shaft through a deep groove ball bearing and is positioned through a positioning ring and a bearing pin;

5. the belt wheel transmission mechanism: the belt pulley shaft is assembled on the vehicle shell through the deep groove ball bearing on the outer ring of the flange, and is axially positioned through the positioning sleeve; the first belt pulley and the shaft sleeve share one M3 bolt to achieve the purpose of locking with the rear shaft; the second belt pulley is assembled on a belt pulley shaft through an M3 bolt and is axially positioned through a positioning ring; the first belt pulley, the second belt pulley and the Stirling engine are connected through belts respectively.

6. The prime mechanism: the stirling engine is secured to the hull by two M3 bolts. The heat energy of alcohol combustion is used as an energy source for the trolley, and the volume change caused by the temperature rise of air in the heat cavity of the Stirling engine forms power to drive the flywheel to rotate, so that the conversion from the heat energy to the mechanical energy is formed.

Drawings

Fig. 1 is a schematic structural diagram of an adjustable 8-track stirling car based on a cam according to an embodiment of the present invention.

Fig. 2 is a bottom view of an adjustable 8-track stirling car based on a cam according to an embodiment of the present invention.

Fig. 3 is a top view of an adjustable 8-track stirling car based on a cam according to an embodiment of the present invention.

In the figure: positioning sleeve (1), Stirling engine (2), vehicle shell (3), cam (4), cam shaft sleeve (5), swing rod sleeve (6), swing rod (7), flange outer ring deep groove ball bearing (8), front fork (9), front wheel (10), gear I (11), M3 bolt (12), shaft sleeve (13), front shaft (14), gear III (15), gear II (16), middle shaft (17), gear IV (18), driven wheel shaft sleeve (19), rear wheel (20), bearing pin (21), rear shaft (22), belt wheel shaft (23), belt (24), belt wheel II (25), belt wheel I (26), deep groove ball bearing (27), positioning ring (28), M3 nut (29), set screw (30)

Detailed Description

The present invention will now be described in more detail by way of examples, which are provided for further illustration.

As shown in figures 1, 2 and 3, the utility model relates to an adjustable 8-track Stirling trolley based on a cam, which mainly comprises a prime mechanism, a cam mechanism, a gear transmission mechanism, a belt wheel transmission mechanism, a steering mechanism and an actuating mechanism. The hydraulic transmission mechanism is composed of a positioning sleeve (1), a Stirling engine (2), a vehicle shell (3), a cam (4), a cam shaft sleeve (5), a swing rod sleeve (6), a swing rod (7), a flange outer ring deep groove ball bearing (8), a front fork (9), a front wheel (10), a first gear (11), an M3 bolt (12), a shaft sleeve (13), a front shaft (14), a third gear (15), a second gear (16), a middle shaft (17), a fourth gear (18), a driven wheel shaft sleeve (19), a rear wheel (20), a bearing pin (21), a rear shaft (22), a belt wheel shaft (23), a belt (24), a second belt wheel (25), a first belt wheel (26), a deep groove ball bearing (27), a positioning ring (28), an M3 nut (29) and a set screw (30).

In the steering mechanism described above: the front wheel (10) and the front fork (9) are fixed through two deep groove ball bearings (27); the front fork (9) is assembled on the vehicle shell (3) through two flange outer ring deep groove ball bearings (8); and drilling and tapping the swing rod sleeve (6). The end part of the swing rod (7) is sleeved with threads, and the swing rod (7) is connected with the swing rod sleeve (6) through the threads; the swing rod sleeve (6) is connected with the front fork (9) through an M3 bolt (12), and when the side surface of the bicycle shell (3) is required to be vertical to the axis of the front wheel (10), the axis of the swing rod (7) is parallel to the axis of the front shaft (14); the swing rod (7) can freely rotate in the horizontal plane, when the trolley runs, the swing rod (7) and the cam (4) are pre-tightened through a rubber band, the swing rod (7) is guaranteed to be constantly contacted with the cam (4), the swing rod (7) is driven to swing along with the rotation of the cam (4), and then the front wheel is driven to swing, and the running route of the trolley is controlled.

In the above gear transmission mechanism: the front shaft (14), the middle shaft (17) and the rear shaft (22) are assembled on the vehicle shell (3) through a flange outer ring deep groove ball bearing (8), and are axially positioned through the positioning sleeve (1); drilling and tapping are carried out on the end face direction of a flange of the shaft sleeve (13), and the shaft sleeve is assembled with a first gear (11) through an M3 bolt (12); drilling and tapping are carried out in the radial direction of the shaft sleeve (13), the shaft sleeve is assembled on the left side of the front shaft through an M3 bolt (12), and the shaft sleeve is axially positioned through a positioning ring (28); the second gear (16) is fixed on the left side of the middle shaft (17) through a set screw (30) after drilling and tapping, and is axially positioned through a positioning ring (28); the third gear (15) has the same processing method as the first gear (11), and is positioned at the position fixed at the left side of the middle shaft; the gear four (18) is fixed at the left end position of the rear shaft (22) in the same way by the processing method of the gear two (16). The two-stage transmission structure with two pairs of gears meshed respectively is adopted, so that the space is saved, the large transmission ratio can be used, the energy utilization rate is improved, and the running time of the trolley is longer.

In the above-described cam mechanism: after drilling and tapping are carried out on the flange end face of the cam shaft sleeve (5), the cam shaft sleeve is assembled with the cam (4) through an M3 bolt (12); the cam shaft sleeve (5) is drilled and tapped in the radial direction, is fixed on the right side of the front shaft (14) through an M3 bolt (12) and an M3 nut (29), and is axially positioned through a positioning ring (28). The front shaft (14) and the cam (4) can be ensured to rotate simultaneously, and the curvature and size of the 8-shaped track can be optimized by rotationally adjusting the profile shape of the cam and the radius of each arc.

In the above-described actuator: the right rear wheel (20) is connected with the shaft sleeve (13) through an M3 bolt (12); the shaft sleeve (13) and the first belt pulley (26) are assembled on the right side of the rear shaft (22) through the same M3 bolt (12) and are axially positioned through a positioning ring (28); the left rear wheel (20) is connected with a driven wheel shaft sleeve (19) through an M3 bolt (12), is assembled at the leftmost side of a rear shaft (22) through a deep groove ball bearing (27), and is positioned through a positioning ring (28) and a bearing pin (21);

in the above pulley transmission mechanism: the belt pulley shaft (23) is assembled on the vehicle shell (3) through the flange outer ring deep groove ball bearing (8), and is axially positioned through the positioning sleeve (1); the first belt pulley (26) and the shaft sleeve (13) share one M3 bolt (12) for assembly, and the second belt pulley (25) is assembled on a belt pulley shaft (23) through the M3 bolt (12) and is axially positioned through a positioning ring (28); the first belt pulley (26), the second belt pulley (25) and the Stirling engine (2) are connected through a belt (24) respectively.

In the above-described prime mover: the Stirling engine (2) is fixed with the vehicle shell (3) through two M3 bolts (12).

Claims

1. The utility model provides an 8 word orbit stirling dollies with adjustable based on cam which characterized in that: the Stirling trolley comprises six mechanisms: prime mechanism, cam mechanism, gear drive, band pulley drive, steering mechanism, actuating mechanism, its connected mode is: the front wheel and the front fork are fixed and connected with each other through a deep groove ball bearing; the front fork is connected with the bicycle shell through a deep groove ball bearing on the outer ring of the flange; the front fork is connected with the swing rod sleeve through an M3 bolt; the swing rod is connected with the swing rod sleeve through threads; the four shafts are mutually connected with the vehicle body through flange outer ring deep groove ball bearings; the cam, the partial gear and the rear wheel are connected with a cam shaft sleeve and a shaft sleeve through M3 bolts; part of the gears and the shaft are fixed through the set screws; the cam shaft sleeve, the belt wheel and the shaft are fixed through an M3 bolt; the belt wheels are connected through a belt; the cam and the swing rod finally rotate the front wheel through the acting force of the rubber band so as to achieve the purpose of controlling the steering of the vehicle body in real time.

2. The adjustable 8-track stirling car based on the cam as claimed in claim 1, wherein the cam is tightly connected with the cam shaft sleeve through M3 bolt and M3 nut, the cam shaft sleeve is fixed on the cam shaft through M3 bolt, the car steering amplitude is controlled by the cam, the curvature, radius and shape of the car track can be adjusted by axially moving the cam by changing the length or number of the positioning rings beside the cam sleeve; the curvature, radius and shape of the advancing track can be changed by changing the shape of the cam; the running track of the trolley in a single period can be changed by changing the transmission ratio of the gear or the belt wheel.

3. The adjustable 8-track Stirling trolley based on the cam as claimed in claim 1, wherein a pair of pulleys is used for transmitting motion between the Stirling engine and the pulley shaft, another pair of pulleys is used for transmitting motion between the pulley shaft and the rear shaft, a pair of gears is used for transmitting motion between the rear shaft and the middle shaft, and another pair of gears is used for transmitting motion between the middle shaft and the front shaft, so that four-stage transmission is formed.

4. The adjustable 8-track stirling car based on cam of claim 1 wherein the pendulum rod axis is parallel to the front axle axis when the side of the car shell is held perpendicular to the front axle axis.

5. The cam-based adjustable 8-track Stirling trolley according to claim 1, wherein a Stirling engine is used as an energy source, and the flywheel is pushed to do work by the principle of expansion with heat and contraction with cold of air, so that the energy is used as the power of the Stirling trolley.