CN211809726U

CN211809726U - Cart capable of going up steps

Info

Publication number: CN211809726U
Application number: CN202020181418.8U
Authority: CN
Inventors: 陶岳洋; 丁长涛; 杨伟康; 张源玮; 刘恒; 程义正
Original assignee: Zhejiang Industry Polytechnic College
Current assignee: Zhejiang Industry Polytechnic College
Priority date: 2020-02-18
Filing date: 2020-02-18
Publication date: 2020-10-30
Anticipated expiration: 2030-02-18

Abstract

The utility model provides a shallow that can go up step relates to cargo handling instrument technical field, including the bottom plate, install in the handle of bottom plate top rear end, install in two at least front wheels that are close to the front end below the bottom plate and install in two at least rear wheels that are close to the rear end below the bottom plate, its characterized in that: the lifting device also comprises at least two front lifting wheels which are arranged below the bottom plate and positioned between the front wheels and the rear wheels, and at least two rear lifting wheels which are arranged below the bottom plate and close to the rear end of the bottom plate; and the front lifting wheel and the rear lifting wheel are lifted through the lifting mechanism. The utility model discloses a function of going up the step can be realized to the front and back lifting wheel, and prior art compares, and stability when going up the step is high.

Description

Cart capable of going up steps

Technical Field

The utility model relates to a cargo handling tool especially relates to a shallow that can go up step.

Background

Hand trucks are the most widely used goods handling tools, and are commonly used for handling heavy objects. At present, more and more handcarts for carrying heavy objects have the function of climbing stairs, for example, a handcart with braking type for going upstairs and downstairs has the name of CN201520570303.7, and provides a technical scheme for the handcart capable of going upstairs. The bicycle mainly comprises a bicycle frame, a bicycle shaft and two triangular wheels; the axle is arranged on the frame; two ends of the axle are respectively provided with a triangular wheel; three corners of a bracket of the triangular wheel are respectively provided with a small wheel, and each small wheel is provided with a clamping brake device; the axis of the triangular wheel is provided with a brake cable twisting device, and the brake cable twisting device is connected with the corresponding three caliper brake devices; each small wheel is correspondingly connected with a set of damping device. This patent cat ladder shallow adopts triangle wheel (planet wheel) can realize going up and down stairs, but because the planet wheel is not very stable at the cat ladder in-process, produces easily and rocks, consequently is not applicable to some heavy objects that can not produce in the handling and rock, like some precision instruments, fragile article, special chemical agent etc..

The present application was made based on this.

SUMMERY OF THE UTILITY MODEL

In order to solve the above-mentioned defect that exists among the prior art, the utility model provides a shallow that can go up the step, stability is high when going up the step.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model discloses a trolley capable of going up steps, which comprises a bottom plate, a handle arranged at the rear end above the bottom plate, at least two front wheels arranged below the bottom plate and close to the front end, at least two rear wheels arranged below the bottom plate and close to the rear end, at least two front lifting wheels arranged below the bottom plate and between the front wheels and the rear wheels, and at least two rear lifting wheels arranged below the bottom plate and close to the rear end of the bottom plate; and the front lifting wheel and the rear lifting wheel are lifted through the lifting mechanism.

As a preferred scheme of the lifting mechanism of the present invention, the lifting mechanism adopts an X-shaped telescopic frame, the X-shaped telescopic frame includes a cross structure formed by two cross rods rotatably connected at the center, two ends of one side of the cross structure are respectively rotatably connected with a slider, the two sliders are respectively slidably mounted on the two slide rods, and a front/rear lifting wheel is mounted on the slide rod located below; two ends of the other side of the cross structure are respectively and rotatably connected to the fixed part; the driving mechanism drives one of the slide blocks of each X-shaped telescopic frame to slide back and forth, so that the stretching of the cross structure and the lifting of the lifting wheel are realized.

As a preferred scheme of the driving mechanism of the present invention, the driving mechanism includes a screw and a driving block in threaded fit with the screw; two sliding blocks on the two X-shaped telescopic frames at the front end or the rear end are fixed through a connecting shaft, and the driving block is fixedly arranged on the connecting shaft. The driving block moves back and forth by controlling the rotation of the screw rod, and the sliding blocks on two sides are driven to move simultaneously by the connecting shaft, so that the telescopic frames on two sides can be lifted simultaneously. The lifting of the lifting wheel can be realized manually, and the required height can be accurately adjusted through the screw rod.

As a further improvement of the driving mechanism of the utility model, the screw rod is close to one end of the rear end of the bottom plate is provided with a rocking handle. The rocking handle is convenient for manual holding.

As a further improvement of the lifting mechanism, a support is arranged on the sliding rod below the lifting mechanism, and a lifting wheel is arranged on the support. Through the support, can avoid lifting wheel and slide bar direct contact, avoid influencing the slip of slider.

As the utility model discloses elevating system's further improvement scheme, length when preceding lifting wheel is packed up completely is less than the front wheel, length when back lifting wheel is packed up completely is less than the rear wheel. The cart can be turned when moving on a flat road.

The utility model discloses a theory of operation:

when the cart meets a step, the two rocking handles are rotated to drive the two sliding blocks to slide through the screw rods, so that the X-shaped telescopic frame extends to enable the lifting wheels to ascend. The front wheel and the rear wheel are all lifted to be higher than the step, and the height is fixed through the holes on the side face of the bottom plate. The cart moves forwards, the front wheels pass through the steps, the front lifting wheels shrink, the cart continues to move forwards, and the rear wheels pass through the steps and the rear lifting wheels are folded, so that the function of going up the steps is achieved.

When the trolley meets a lower step, the trolley moves to the rear lifting wheel to leave the step, the rear lifting wheel rises, the trolley continues to move to the front lifting wheel to leave the step, the front lifting wheel rises, the trolley moves to the front wheel to leave the step, and the front lifting wheel and the rear lifting wheel are all folded, so that the function of the lower step is realized.

The utility model discloses can realize following technological effect:

(1) the utility model discloses a function of going up the step can be realized to the front and back lifting wheel, and prior art compares, and stability when going up the step is high.

(2) The utility model discloses a front and back lifting wheel can realize that the bottom plate is parallel and the ground motion, and the motion is steady when crossing the step, avoids unnecessary loss for precision instruments or liquid when the transportation goods.

(3) The utility model discloses a screw rod transmission, the different screw thread intervals of accessible obtain different drive ratios, and prior art compares, and is comparatively laborsaving during the bench work.

(4) The utility model discloses a smooth upper and lower step can be realized to the front and back lifting wheel.

Drawings

Fig. 1 is a schematic perspective view of a cart capable of going up steps according to the present embodiment;

FIG. 2 is a schematic view of the cart with front and rear lifting wheels capable of ascending steps according to the present embodiment;

FIG. 3 is a schematic view of the cart with front and rear wheels being opened for ascending steps according to the present embodiment;

fig. 4 is a schematic view illustrating a state that the front lifting wheel of the cart capable of ascending steps is retracted and the rear lifting wheel is opened according to the embodiment.

Description of the labeling: the device comprises a base plate 1, a handle 2, a front wheel 31, a rear wheel 32, a front lifting wheel 41, a rear lifting wheel 42, a front telescopic frame 51, a rear telescopic frame 52, a first screw rod 61, a first connecting shaft 62, a first driving block 63, a first rocking handle 64, a second screw rod 71, a second connecting shaft 72, a second driving block 73, a second rocking handle 74, an upper sliding block 81, a lower sliding block 82, an upper sliding rod 83, a lower sliding rod 84, a support 91 and a bearing seat 92.

Detailed Description

In order to make the technical means and the technical effects achieved by the technical means of the present invention clearer and more complete, the following embodiments are provided and are described in detail with reference to the accompanying drawings as follows:

as shown in fig. 1 to 4, the cart capable of going up steps of the present embodiment includes a bottom plate 1, a handle 2 mounted on the upper rear end of the bottom plate 1, two front wheels 31 mounted below the bottom plate 1 near the front end, two rear wheels 32 mounted below the bottom plate 1 near the rear end, two front lifting wheels 41 mounted below the bottom plate 1 and between the front wheels 31 and the rear wheels 32, and two rear lifting wheels 42 mounted below the bottom plate 1 and near the rear end of the bottom plate 1; the front lifting wheel 41 and the rear lifting wheel 42 are lifted by the lifting mechanism.

The following describes the lifting mechanism employed in the present embodiment:

the lifting mechanism of the embodiment adopts an X-shaped telescopic frame, each lifting wheel is provided with one X-shaped telescopic frame, roughly speaking, the X-shaped telescopic frame comprises a cross structure formed by two cross rods with hinged centers, two ends of one side of the cross structure are respectively hinged with a sliding block (an upper sliding block 81 and a lower sliding block 82), and the two sliding blocks are respectively installed on the two sliding rods in a sliding manner (an upper sliding rod 83 and a lower sliding rod 84). The lower slide bar 84 is provided with a bracket 91 for mounting the front/rear lifting wheels 42; the two ends of the other side of the cross structure are respectively hinged on the fixed part and can be hinged on the end part of the sliding rod; one of the slide blocks (the upper slide block 81) of each X-shaped telescopic frame is driven by the driving mechanism to slide back and forth, so that the stretching of the cross structure and the lifting of the lifting wheel are driven. Meanwhile, the driving mechanism of the embodiment comprises a screw and a driving block 73 in threaded fit with the screw; the two sliders on the two X-shaped telescopic frames at the front end or the rear end are fixed through a connecting shaft, and the driving block 73 is fixedly arranged on the connecting shaft. The driving block 73 is moved back and forth by controlling the rotation of the screw rod, and the sliding blocks on the two sides are driven to move simultaneously by the connecting shaft, so that the telescopic frames on the two sides can be lifted simultaneously.

With reference to fig. 1, specifically, two sliding blocks (upper sliding blocks 81) on the two X-shaped telescopic frames at the front ends are fixed by one first connecting shaft 62, and the other two sliding blocks (upper sliding blocks 81) on the two X-shaped telescopic frames at the rear ends are fixed by the other second connecting shaft 72; a driving block 73I 63 is fixedly arranged on the connecting shaft I62, and the driving block 73I 63 is in threaded connection with a screw rod I61; a second driving block 73 is fixedly arranged on the second connecting shaft 72, and the second driving block 73 is in threaded connection with the second screw rod 71; both ends of the first screw rod 61 and the second screw rod 71 are respectively arranged on the bearing block 92; one end of the first screw 61 is provided with a first rocking handle 64, one end of the second screw 71 is provided with a second rocking handle 74, and the rocking handles are arranged at positions close to the handle 2. The first screw rod 61 or the second screw rod 71 is controlled to rotate by rotating the first rocking handle 64 or the second rocking handle 74, so that the first driving block 73 or the second driving block 73 moves back and forth, and the first connecting shaft 62 or the second connecting shaft 72 drives the sliding blocks on the two sides of the front end or the rear end to move simultaneously, so that the telescopic frames on the two sides can be lifted and lowered simultaneously.

In addition, in order to improve the stability of the cart on steps, the front wheel 31 is a fixed pulley, and the rear wheel 32 is a movable pulley in the embodiment. Of course, the exchange of the front and rear wheels 32 (as shown in the drawings) also has no effect on the function of going up the stairs. Meanwhile, in order to make the cart turn when moving on a flat road, the length of the front lifting wheels 41 is shorter than that of the front wheels 31 when being fully retracted, and the length of the rear lifting wheels 42 is shorter than that of the rear wheels 32 when being fully retracted. The side of the bottom plate 1 is provided with a hole, the rocking handle can stretch out and draw back, and when the rocking handle needs to be fixed and the lifting mechanism is locked, the rocking handle is inserted into the hole, so that the fixation can be realized.

The above is a detailed description of the technical solutions provided in connection with the preferred embodiments of the present invention, and it should not be assumed that the embodiments of the present invention are limited to the above description, and it will be apparent to those skilled in the art that the present invention can be implemented in a variety of ways without departing from the spirit and scope of the present invention. Such as: the number of the front/rear wheels can be multiple, and the number of the front/rear lifting wheels can be multiple; elevating system can adopt the mode through the flexible height control lifting wheel of cylinder, electric cylinder, also falls into the scope of protection of this application.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "front", "rear", "both sides", "both ends" and the like indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.

Claims

1. The utility model provides a shallow that can go up step, includes the bottom plate, installs in the handle of bottom plate top rear end, installs in the bottom plate below near two at least front wheels of front end and install in two at least rear wheels that are close to the rear end below the bottom plate, its characterized in that: the lifting device also comprises at least two front lifting wheels which are arranged below the bottom plate and positioned between the front wheels and the rear wheels, and at least two rear lifting wheels which are arranged below the bottom plate and close to the rear end of the bottom plate; and the front lifting wheel and the rear lifting wheel are lifted through the lifting mechanism.

2. A pushchair capable of climbing steps, according to claim 1, wherein: the lifting mechanism adopts an X-shaped telescopic frame, the X-shaped telescopic frame comprises a cross structure formed by two crossed rods with centers rotatably connected, two ends of one side of the cross structure are respectively rotatably connected with a sliding block, the two sliding blocks are respectively slidably mounted on two sliding rods, and front/rear lifting wheels are mounted on the sliding rods positioned below; two ends of the other side of the cross structure are respectively and rotatably connected to the fixed part; the driving mechanism drives one of the slide blocks of each X-shaped telescopic frame to slide back and forth, so that the stretching of the cross structure and the lifting of the lifting wheel are realized.

3. A pushchair capable of climbing steps, according to claim 2, wherein: the driving mechanism comprises a screw and a driving block in threaded fit with the screw; two sliding blocks on the two X-shaped telescopic frames at the front end or the rear end are fixed through a connecting shaft, and the driving block is fixedly arranged on the connecting shaft.

4. A pushchair capable of climbing steps, according to claim 3, wherein: and a rocking handle is arranged at one end of the screw rod close to the rear end of the bottom plate.

5. A pushchair capable of climbing steps, according to claim 2, wherein: the sliding rod positioned below is provided with a bracket, and the bracket is provided with a lifting wheel.

6. A pushchair capable of climbing steps, according to claim 1, wherein: the length of the front lifting wheel when being completely folded is shorter than that of the front wheel, and the length of the rear lifting wheel when being completely folded is shorter than that of the rear wheel.