CN105346581B - A kind of power-assisted dolly of climbing stairs - Google Patents

Abstract

The invention relates to a stair-climbing power-assisted trolley, which comprises a telescopic vehicle frame and combined wheels; the combined wheels include three runners evenly distributed in the circumferential direction and a support frame connecting the three runners; the vehicle frame The tail of the car frame is provided with a rotatable and telescopic push handle; the two sides of the head of the frame are respectively provided with a front wheel frame which is rotatable and positioned by a spring pin, and the two sides of the tail are respectively provided with a rear wheel frame; the combined wheel They are respectively arranged at the bottom of the front wheel frame and the rear wheel frame, and are connected with the front wheel frame and the rear wheel frame through a support frame; a rotation positioning device is also arranged between the combined wheel and the rear wheel frame; the present invention adjusts the wheel frame so that The frame can be placed horizontally when going up the stairs, which avoids damage to items due to sliding collisions, and does not require strong support when resting in the middle, thereby saving energy.

Description

Stair-climbing power-assisted trolley

technical field

The invention relates to the field of transportation, in particular to a stair-climbing power-assisted trolley.

Background technique

The prior art 200920271503.7 discloses a stair-climbing trolley, which includes a car body and a frame wheel combination. The car body is provided with a push handle, a cart basket and a wheel support. The bottom of the wheel support is provided with a bushing, and the bushing has a built-in rotating bearing. ; The frame wheel combination is provided with three runners and a wheel frame that are evenly distributed on the same circumference, and the rotating shaft of the wheel frame passes through the axle sleeve and the bearing and is fixed with a retaining ring or a nut for the shaft; In the tilted state, the items will move towards the lower part of the main body of the car, which is not only prone to collisions, damages to fragile items, etc., but also increases the weight of the lower part of the main body of the car. When resting in the middle, you need to support it hard, otherwise the small cart will go down the stairs Dangerous accidents occur due to slipping and falling. For this reason, we have developed a stair-climbing power-assisted trolley. By adjusting the wheel frame, the frame can be placed horizontally when going up the stairs, which avoids damage to items due to sliding collisions, and does not cause damage during rest. It needs to be supported hard, thus saving energy.

Contents of the invention

The object of the present invention is to overcome the deficiencies of the prior art and provide a stair-climbing power-assisted trolley. By adjusting the wheel frame, the frame can be placed horizontally when going up the stairs, avoiding the damage of items due to sliding collision, and resting in the middle When you don't need to support it hard, you save your energy.

In order to achieve the above object, the technical solution adopted by the present invention is: a stair-climbing power-assisted trolley, including a telescopic vehicle frame and a combined wheel; the combined wheel includes three runners evenly distributed in the circumferential direction and three The supporting frame of the running wheel; the tail of the frame is provided with a rotatable and telescopic push handle; the two sides of the head of the frame are respectively provided with a front wheel frame which is rotatable and positioned by a spring pin, and the two sides of the tail are respectively A rear wheel frame is provided; the combined wheels are respectively arranged at the bottom of the front wheel frame and the rear wheel frame, and are connected with the front wheel frame and the rear wheel frame through a support frame; Positioning means.

Preferably, the rotation positioning device includes a fixed plate arranged on the rear wheel frame and a rotating plate arranged on the support frame; the fixed plate and the rotating plate are connected through a connecting shaft, and a plurality of The card slots are evenly distributed in the circumferential direction, and the rotating disk is also provided with a card block locked in the card slots.

Preferably, through holes evenly distributed in the circumferential direction are respectively provided at the connection between each front wheel frame and the rotating shaft; spring pins arranged in the through holes are respectively provided on both sides of the head of the frame.

Preferably, a rotating shaft is provided under the head of the vehicle frame; a torsion spring is sleeved on the rotating shaft, and front wheel frames fixedly connected to the two ends of the vehicle frame are respectively arranged on the outside of the vehicle frame, and the front wheel frame is made to move smoothly through the torsion spring. The hour hand turns.

Preferably, an arc-shaped groove is arranged above each of the rear wheel frames; the two ends of the push handle are respectively arranged in the arc-shaped groove, and are fixed by locking blocks.

Due to the application of the above-mentioned technical solution, the present invention has the following advantages compared with the prior art:

The stair-climbing power-assisted trolley of the present invention adjusts the wheel frame so that the vehicle frame can be placed horizontally when going up stairs, avoiding damage to objects due to sliding collisions, and does not need to be supported when resting halfway, thereby saving energy.

Description of drawings

Below in conjunction with accompanying drawing, technical solution of the present invention will be further described:

Accompanying drawing 1 is the structural diagram of the power-assisted trolley that can climb stairs according to the present invention;

Accompanying drawing 2 is the partial enlarged view of place A in Fig. 1;

Accompanying drawing 3 is the working schematic diagram of the power-assisted trolley that can climb stairs according to the present invention;

Among them: 1. Vehicle frame; 2. Front wheel frame; 21. Through hole; 3. Combined wheel; 4. Torsion spring; 5. Push handle; 6. Spring pin; 7. Rear wheel frame; 71. Arc groove; 8 , lock block; 9, fixed plate; 10, rotating plate; 11, block; 12, card slot; 13, rotating shaft; 14, runner; 15, support frame.

detailed description

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Accompanying drawing 1-3 is the power-assisted trolley that can climb stairs according to the present invention, comprises telescopic vehicle frame 1, combined wheel 3; Said combined wheel 3 comprises three runners 14 evenly distributed in the circumferential direction and connects three The supporting frame 15 of the running wheel 14; the head of the vehicle frame 1 is provided with a rotating shaft 13, and the rear wheel frame 7 is respectively arranged on both sides of the tail; the rotating shaft 13 is sleeved with a torsion spring 4, and the two ends are on the vehicle. Frame 1 outside is respectively provided with threaded fixed connection or welded front wheel frame 2, makes front wheel frame 2 rotate clockwise by torsion spring 4, is convenient to reset; Through holes 21 evenly distributed in the circumferential direction; spring pins 6 are respectively arranged on both sides of the head of the vehicle frame 1, and by cooperating with different through holes 21, the angle of the front wheel frame 2 can be adjusted; each of the rear wheels The top of the frame 7 is provided with an arc-shaped groove 71; the tail portion of the vehicle frame 1 is also provided with a telescopic push handle 5 with both ends arranged in the arc-shaped groove 71; the two ends of the push handle 5 are fixed by a lock block 8, Prevent the two ends from slipping out of the arc groove 71; the expansion and contraction of the vehicle frame 1 and the push handle 5 are all controlled by the spring pins provided by themselves; the combined wheels 3 are respectively arranged at the bottom of the front wheel frame 2 and the rear wheel frame 7, And be connected with front wheel frame 2 and rear wheel frame 7 through bracing frame 15; Also be provided with rotation positioning device between described combined wheel 3 and rear wheel frame 7; Fixed disk 9, the rotating disk 10 that is arranged on the support frame 15; Said fixed disk 9 and rotating disk 10 are connected by connecting shaft, can rotate mutually, and described rotating disk 10 is provided with block 11, is set on rotating disk 10 There are a plurality of draw-in slots 12 evenly distributed in the circumferential direction, and the cooperation of the draw-in blocks 11 and the draw-in slots 12 can make the fixed disc 9 and the rotating disc 10 fixed, which is convenient for climbing stairs.

When in use: press the spring pin 6, turn the front wheel frame 2, as shown in Figure 3, just can ensure that the frame 1 is placed horizontally when going up the stairs, and the frame 1 and the push handle can be freely adjusted according to the size of the item and the height of the steps 5 sizes.

Due to the application of the above-mentioned technical solution, the present invention has the following advantages compared with the prior art:

The stair-climbing power-assisted trolley of the present invention adjusts the wheel frame so that the vehicle frame can be placed horizontally when going up stairs, avoiding damage to objects due to sliding collisions, and does not need to be supported when resting halfway, thereby saving energy.

The above are only specific application examples of the present invention, and do not constitute any limitation to the protection scope of the present invention. All technical solutions formed by equivalent transformation or equivalent replacement fall within the protection scope of the present invention.

Claims (1)

1. a kind of power-assisted dolly of climbing stairs, includes vehicle frame, built-up wheel；It is equal that the built-up wheel includes three circumferencial directions The support frame of three runners of runner and connection of even distribution；The afterbody of the vehicle frame is provided with rotatable pushing hands；Its feature exists In：The vehicle frame and pushing hands are scalable；The head on both sides of the vehicle frame are respectively arranged with rotatably and by spring finger setting Front truck wheel carrier, two sides of tail is respectively arranged with rear wheel frame；The built-up wheel is separately positioned on front truck wheel carrier and rear wheel Frame bottom, and be connected by support frame with front truck wheel carrier and rear wheel frame；Also set up between the built-up wheel and rear wheel frame There is rotary positioning apparatus；The rotary positioning apparatus include be arranged on rear wheel frame fixed disk, be arranged on support frame Rotating disc；It is uniform that the fixed disk and rotating disc are provided with multiple circumferencial directions by connecting axis connection, and on the rotating disc The neck of distribution, the fixture block being stuck in neck is additionally provided with the rotating disc；Each front truck wheel carrier and the connection of rotating shaft Place is respectively arranged with the equally distributed through hole of circumferencial direction；The head on both sides of the vehicle frame, which are respectively arranged with, to be arranged in through hole Spring catch；The lower head of the vehicle frame is provided with rotating shaft；Torsion spring is arranged with the rotating shaft, and both ends are distinguished in frame outside The front truck wheel carrier being fixedly connected is provided with, rotates clockwise front truck wheel carrier by torsion spring；The top of each rear wheel frame It is provided with deep-slotted chip breaker；The both ends of the pushing hands are separately positioned in deep-slotted chip breaker, and are fixed by closing piece.