CN201033579Y - Portable semi-automatic stair climbing trolley - Google Patents

Abstract

The utility model discloses a portable semi-automatic stair climbing trolley. The motor, worm gear reducer and support are installed on the bottom plate; the motor is connected with the reducer through a coupling, and the support shaft is installed between the two supports of each group, and one end of the two rockers is connected to the respective support The seat shaft is hinged, and the other ends are slidingly connected with one end of the respective sleeves. The cranks at both ends of the output shaft of the reducer are respectively hinged with the lower part of the sleeves. The two supporting wheels are installed on the two outer sides of the upper part of the sleeves. Two universal wheels are installed on both sides of the vehicle frame bottom surface close to the motor. The output shaft of the reducer drives the rotation of the crank, and the crank drives the sleeve rocker to make the support wheel move in a "crescent" trajectory. The support wheels are stretched out, placed on the last step, and the dolly is lifted up. The supporting wheels are on the last step, and the supporting wheels are retracted inwardly, so that the trolley is placed on the next step, so as to realize going up and down the stairs.

Description

Portable semi-automatic stair climbing trolley

technical field

The utility model relates to a device for going up and down stairs, in particular to a portable semi-automatic stair climbing trolley.

Background technique

The research of stair-climbing dolly has nearly a hundred years of history, and compound wheel type, lever type, crawler-type stair-climbing dolly have been invented at present, but it all is to adopt full-automatic stair-climbing method.

The most notable feature of the stair-climbing mechanism of compound wheel type (as shown in Figure 1) is to be made of some steamboats evenly distributed on " Y " shape or " ten " font tie rods. Each small wheel can rotate around its own axis, and can revolve around the central axis together with the tie rod. When walking on flat ground, each small wheel rotates by itself; and when climbing stairs, each small wheel revolves together, thereby realizing the function of climbing stairs. However, it has relatively serious bumps and impacts, poor stability, cannot adapt to steps of different sizes, and there are difficulties in turning.

The main feature of the lever type (as shown in Figure 2) is to have two sets of supporting devices, which alternately support to realize the function of going up and down stairs. The stair-climbing process of this mechanism is similar to the process of people going up and down the stairs, and it is also called a walking stair-climbing dolly. The lever type has obvious pause time in the process of going up and down the stairs, and at the same time, the bumps and impacts are serious, the stability is poor, and it is easy to turn over when it is not operated properly.

The main feature of the crawler type (as shown in Figure 3) is that in the process of going up and down the stairs, the center of gravity of the trolley always moves along a straight line parallel to the line connecting the steps of the stairs, the fluctuation of the center of gravity is very small, and the movement is very stable. However, when the track is in contact with the stairs, the pressure is very high, and the stairs and the track are worn to a large extent during the movement; at the same time, the length of the track needs to be at least three steps long, which seriously affects the turning.

Contents of the invention

In order to overcome the existing full-automatic stair-climbing trolley's problems of bumping, serious impact and poor stability, the purpose of this utility model is to provide a portable semi-automatic stair-climbing trolley, which can not only go up and down stairs smoothly, but also This trolley has good safety and stability and is suitable for various stairs.

The technical solution adopted by the utility model to solve its technical problems is: a motor, a worm gear reducer and two sets of two sub-supports are installed on the bottom plate of the vehicle frame; the motor is connected with the worm gear reducer through a shaft coupling, Two sets of two pairs of supports are installed on both sides of the frame floor respectively, and support shafts are installed between the supports of each group, and one end of the two rockers is respectively hinged with the respective support shafts. The other ends of the rockers are slidingly connected to one end of the respective sleeves, and the other ends of the sleeves are connected with a connecting shaft. The connecting shafts located outside the two sleeves are respectively equipped with supporting wheels, and the worm gear of the Hall sensor is installed on the side. The worm reducer is installed on the bottom plate of the frame inside the two rockers. One end of the two cranks is respectively connected to the output shaft at both ends of the reducer, and the other end of the two cranks is hinged to the sleeve respectively. The crank opposite to the Hall sensor The end face is equipped with permanent magnets and two large wheels are respectively installed on the two outer sides of the vehicle frame bottom plate, and two universal wheels are respectively installed on both sides of the vehicle frame bottom surface close to the motor.

The beneficial effects of the utility model are: the trolley can not only go up and down the stairs smoothly, but also can be applied to steps of various sizes, there is no problem of difficult positioning of the wheels and the steps, and the operation is simple, the safety is high, and the utility model is strong. A chair is installed on the car body, which can help people with disabilities in the lower limbs go up and down the stairs smoothly. If a cargo compartment is installed on the car body, it can help carry heavy objects smoothly when going up and down the stairs.

Description of drawings

Fig. 1 is the schematic diagram of the stair climbing mechanism of compound wheel type;

Fig. 2 is a schematic diagram of a lever-type stair climbing mechanism;

Fig. 3 is a schematic diagram of a crawler-type stair climbing mechanism;

Fig. 4 is the front view of the utility model;

Fig. 5 is a top view of the utility model;

Fig. 6 is a stair-climbing core mechanism diagram of the present utility model;

Fig. 7 is a schematic diagram of the working process of going upstairs of the utility model;

Fig. 8 is a schematic diagram of the working process of the utility model going downstairs;

Fig. 9 is a schematic diagram of the position of the Hall sensor of the present invention;

Fig. 10 is a schematic diagram of the position of the permanent magnet of the present invention.

In the figure: 1. universal wheel, 2. block, 3. motor, 4. support, 5. coupling, 6. worm gear reducer, 7. rocker, 8. crank, 9. big wheel, 10. Sleeve, 11. Support wheel, 12. Frame bottom plate, 13. Support shaft, 14. Reducer output shaft, 15. Battery box, 16. Handrail, 17. Connecting shaft.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

As shown in Fig. 4, Fig. 5 and Fig. 6, the utility model is equipped with a motor 3, a worm gear reducer 6 and two sets of two sub-supports 4 on the bottom plate 12 of the vehicle frame; the motor 3 passes through the coupling 5 is connected with the worm gear reducer 6, two sets of two sub-supports 4 are respectively mounted on both sides of the chassis bottom plate 12, and a support shaft 13 is installed between the supports 4 of each group, and two rockers One end of 7 is respectively hinged with respective bearing shaft 13, and the other end of two rocking bars 7 is respectively connected with sliding connection with one end of respective sleeve 10, and the other end of sleeve 10 is integrated with connecting shaft 17, and is positioned at two sleeves. The connecting shafts 17 on the outside of 10 are equipped with support wheels 11 respectively, and Hall sensors a are installed on the side. One end of the crank 8 is respectively keyed to the output shaft 14 at both ends of the reducer, and the other ends of the two cranks 8 are respectively hinged to the sleeve 10, and the end surface of the crank opposite to the Hall sensor a is equipped with a permanent magnet b, as shown in Figure 10 , two bull wheels 9 are respectively contained in vehicle frame base plate 12 two outer sides, and two universal wheels 1 are contained in respectively near the vehicle frame bottom surface both sides of motor 3.

Chair or cargo compartment are also housed on the described vehicle frame bottom plate 12. The car body is equipped with chairs, which can help people with lower limbs to go up and down the stairs smoothly, and the car body is equipped with cargo compartments, which can help to carry heavy objects smoothly when going up and down the stairs.

As shown in Figure 4, the motor 3 is connected to the worm gear reducer 6 through the coupling 5, and the output shaft 14 of the reducer drives the sleeve 10 and the rocker 7 to move through the crank 8, so that the supporting wheel 11 takes a "crescent" trajectory sports.

In the embodiment shown in Figures 4, 5, and 6, when going up stairs, turn on the switch of the battery box 15, and the motor 3 will rotate forward through the coupling 5 to drive the input shaft of the worm gear reducer 6, and the gear will be decelerated by the motor itself. The two-stage deceleration of the device and the worm reducer 6 drives the output shaft 14 to rotate, and the crank 8 drives the sleeve 10 and the rocker 7 to move, so that the support wheel 11 moves clockwise in a crescent shape. When climbing stairs, the system operates, and the support wheel 11 will move according to the trajectory shown in Figure 7. When the support wheel 11 contacts the step of the previous level and continues to move clockwise, the position shown in Figure 7 will be due to the frictional force. The support wheel 11 remains stationary with the upper step, and the entire vehicle body is lifted to the step where the support wheel 11 is located due to the reaction force. When the big wheel 9 reaches this step, the support wheel 11 just moves to the "crescent" curve. At the lowest point, it starts to move inward and upward along the curve. At this time, the assistant pulls the handrail 16 of the trolley horizontally toward himself, so that the big wheel 9 leans against the edge of the next step. At this time, the support wheel just rotates a Circle back to the next step you will be ascending, and prepare to start climbing a step.

When going down the stairs, turn on the battery box 15 switch to make the motor 3 reversely rotate through the coupling 5 to drive the input shaft of the worm gear reducer 6. The output shaft 14 rotates, so that the crank 8 drives the sleeve 10 and the rocker 7 to move, so that the support wheel 11 moves counterclockwise according to the original track. Due to the effect of the Hall sensor a installed on the side of the worm gear reducer 6 and the permanent magnet b on the end face of the crank 8, the support wheel 11 stops at a predetermined reset position, as shown in Figure 8, and the handrail 16 of the trolley is pushed horizontally. Before, the big wheel 9 is suspended in the air and the whole weight of the trolley is fully borne by the support wheel 11, and the switch of the battery box 15 downstairs is opened again, and the support wheel 11 moves outwards and upwards according to the "crescent" track under the drive of the motor 3, because At this time, the support wheel 11 still remains stationary because of the frictional force and the step, so the dolly is slowly placed on the next step, and then the support wheel 11 retracts back after reaching the highest point along the track. The Hall sensor a on the side and the permanent magnet b on the end face of the crank 8 make the support wheel 11 stop at the reset position again to prepare for the next downstairs action. Then repeat the same action as above to climb down a step.

The above-mentioned specific embodiments are used to explain the utility model, rather than to limit the utility model. Within the spirit of the utility model and the scope of protection of the claims, any modifications and changes made to the utility model fall into the scope of the utility model. scope of protection.

Claims (2)

1. A portable semi-automatic stair-climbing dolly, characterized in that: a motor (3), a worm gear reducer (6) and two sets of two secondary supports (4) are housed on the vehicle frame bottom plate (12); The motor (3) is connected with the worm gear reducer (6) through a shaft coupling (5), and two pairs of supports (4) that form a group are installed on both sides of the vehicle frame bottom plate (12). A support shaft (13) is installed between the supports (4), and one end of the two rocking bars (7) is hinged with the respective support shafts (13) respectively, and the other ends of the two rocking bars (7) are respectively connected with the respective support shafts (13). One end of the sleeve (10) is slidingly connected, and the other end of the sleeve (10) is integrated with a connecting shaft (17), and supporting wheels (11 ), the worm gear reducer (6) with the Hall sensor (a) on the side is installed on the bottom plate (12) of the frame in the two rockers (7), and one end of the two cranks (8) is connected to the two sides of the reducer respectively. The end output shaft (14) is keyed, the other ends of the two cranks (8) are respectively hinged with the sleeve (10), the end face of the crank opposite to the Hall sensor (a) is equipped with a permanent magnet (b), and the two large wheels (9) are respectively contained in the vehicle frame bottom plate (12) both outsides, and two universal wheels (1) are contained in respectively the vehicle frame bottom both sides near motor (3). 2. A portable semi-automatic stair-climbing trolley according to claim 1, characterized in that: a chair or a cargo compartment is also mounted on the bottom plate of the frame (12).

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