CN204452506U - A kind of automatic transport trolley crossing threshold - Google Patents

Abstract

The utility model relates to a transport vehicle for automatically crossing the threshold, which comprises a vehicle body, a handrail and wheels. At the bottom, the bottom end of the connecting shaft is connected with the wheel, and the top end of the connecting shaft is hinged with the locking device. The locking device is installed on the bottom surface of the car body. The locking device includes a locking rod, a locking bracket, a limit rod and a tensioning The spring, the locking bracket and the locking rod are connected by tensioning the spring, and the limiting rod is mainly used for limiting the position of the connecting shaft. The utility model has the advantages of simple structure, convenient operation and good stability.

Description

A transport vehicle that automatically crosses the threshold

technical field

The utility model belongs to the technical field of transport machinery, in particular to a transport vehicle that automatically crosses a threshold.

Background technique

At present, common trucks include: small-wheeled trucks, crawler trucks, and folding combined trucks. The balance of small-wheeled trucks is not enough, and the goods will bump when crossing obstacles. It is suitable for small towbar boxes, small Light-duty equipment such as trucks; crawler trucks have complex structures and heavy weights, and are suitable for large-scale handling cranes; folding combined trucks are more complex in technology and difficult to implement, and are suitable for small and medium-sized trucks.

Although the above-mentioned three kinds of trucks are relatively mature, for the special problem of crossing the threshold, the balance of the small-wheel truck is not enough, the structure of the crawler truck is complicated, and the implementation of the folding combined truck is difficult. Meet the technical requirements of cross-threshold trucks. Therefore, if there is a cross-threshold truck with simple structure, convenient implementation and good stability, it will have broad market potential, thereby producing huge economic benefits.

Contents of the invention

The purpose of the utility model is to provide a truck with simple structure, convenient implementation and good stability, which can cross the threshold, so as to solve the problem of crossing the threshold when the truck is loaded with heavy objects.

In order to achieve the above object, the utility model adopts the following technical scheme: a truck that automatically crosses the threshold, including a car body, a handrail and wheels, the handrail is installed on one side of the car body, and the wheels pass through the connecting shaft Installed on the bottom of the car body, it is characterized in that it also includes a locking device and an unlocking device, the locking device is installed on the bottom surface of the car body and is hinged with the top end of the connecting shaft, and the unlocking device is installed On the upper part of the connecting shaft, the top end of the unlocking device is connected with the locking device.

According to the above solution, the locking device includes a locking rod, a locking bracket, a limit rod and a first tension spring, and the locking bracket is two symmetrically arranged "L"-shaped bracket structures, and the locking bracket is fixed on the On the bottom surface of the car body, the top end of the connecting shaft is a circular arc surface, and the connecting shaft is hinged to the locking bracket through a pin shaft; the locking rods respectively pass through the locking holes provided on the two "L"-shaped brackets , the two ends of the limiting rod are fixedly connected with the two "L"-shaped brackets respectively, and the connecting shaft is positioned in the vertical direction through the locking rod and the limiting rod; the first tension spring The two ends are respectively fixed on the locking rod and the pin shaft.

According to the above solution, the unlocking device includes an arc-shaped elastic piece, a touch baffle and a second tension spring, the bottom end of the arc-shaped elastic piece is fixed on the connecting shaft, and the top end of the arc-shaped elastic piece is connected to the locking rod The bottom end of the touch baffle is fixed on the connecting shaft, the top of the touch baffle is connected with one end of the second tension spring, and the other end of the second tension spring is connected with the pin connected.

According to the above solution, the locking hole is a vertically arranged waist-shaped hole.

According to the above scheme, the wheels are universal wheels.

The beneficial effects of the utility model are: 1. The structure is simple, and all of them are passive devices, which reduces the volume and weight of the mechanism; 2. It can carry a variety of different types of goods, weighing tens to hundreds of kilograms, only It takes 1-2 people to complete the operation, which reduces labor costs, and the operation difficulty is relatively low, and the implementation is quite convenient; 3. Only need to apply a forward pulling force to the truck to realize the process of automatically crossing the threshold quickly and smoothly, and the operation is very Simple and very convenient to implement.

Description of drawings

Fig. 1 is the front view of an embodiment of the utility model.

Fig. 2 is a side view of a locking device and an unlocking device according to an embodiment of the present invention.

Fig. 3 is a front view of a locking device and an unlocking device according to an embodiment of the present invention.

4a, 4b, 4c are step-by-step diagrams of crossing the threshold in an embodiment of the present invention.

Among them: car body 1, armrest 2, wheel 3, connecting shaft 4, locking lever 5, locking bracket 6, limit lever 7, first tension spring 8, pin shaft 9, locking hole 10, second tension spring 11 , the arc shrapnel 12 touches the baffle 13 .

Detailed ways

The implementation of the utility model is now described in conjunction with the accompanying drawings, and the utility model is not limited to the following examples.

As shown in Figure 1, a truck that automatically crosses the threshold includes a car body 1, a handrail 2 and wheels 3, the handrail 2 is arranged on one side of the car body 1, and the wheels 3 are arranged on the side of the car body through a connecting shaft 4. The bottom also includes a locking device and an unlocking device. The locking device is arranged on the bottom surface of the car body and is hinged with the top of the connecting shaft. The unlocking device is arranged on the top of the connecting shaft, and its top is connected with the locking device. When the truck transports goods normally, the wheels are kept vertically positioned by the locking device; when crossing the threshold, the locking device is released by the unlocking device, and the wheels are rotated relative to the car body through the connecting shaft to complete the process of crossing the threshold. There are 6 wheels in total at the front, middle and rear, and each wheel is a universal wheel. When crossing the threshold, you only need to apply a forward pulling force to the truck to realize automatic, fast and stable crossing of the threshold.

As shown in Figure 2-3, the locking device includes a locking rod 5, a locking bracket 6, a limit rod 7 and a first tension spring 8. The locking bracket is two symmetrically arranged "L"-shaped bracket structures, which are fixed on On the bottom surface of the car body 1, the top of the connecting shaft 4 is a circular arc surface, and the connecting shaft is hinged with the locking bracket through the pin shaft 9; The hole 10 is a waist-shaped hole vertically arranged, and the locking rod can move up and down along the locking hole. Positioning in the vertical direction; the two ends of the first tension spring 8 are respectively fixed on the locking rod and the bearing pin, and the locking rod is fixed in the lower position of the locking hole under the pulling force of the first tension spring.

The unlocking device comprises an arc shrapnel 12, a touch baffle 13 and a second tension spring 11, the bottom end of the arc shrapnel 12 is fixed on the connecting shaft 4, and its top is connected with the locking rod 5; the bottom of the touch baffle 13 The end is fixed on the connecting shaft, and its top is connected with one end of the second tension spring 11, and the other end of the second tension spring is connected with the pin shaft 9, and the touch baffle is kept in line with the arc under the pulling force of the second spring. Shaped shrapnel tangent.

As shown in Figures 4a-4c, the entire process of the utility model when carrying goods over the threshold is as follows:

1) Move the truck to the threshold, and the touch baffle 13 of the unlocking device of the front row wheels 3 is against the threshold to generate pressure. At this time, the arc-shaped shrapnel 12 is deformed under the pressure, and an upward thrust is generated to overcome the first tension. The tension of the spring pushes the locking rod 5 to move up along the locking hole 10 to realize the unlocking of the locking device. As the truck continues to move forward, the connecting shaft 4 rotates around the pin shaft 9, and the arc surface at the top of the connecting shaft moves along the locking rod. Turn until the entire wheel crosses the threshold;

2) Continue to move the truck forward. After the front wheels 3 of the truck pass the threshold, the resistance pressure disappears. The wheels return to the vertical original position under the action of their own weight, and the locking device returns to the locked state. Under the action of the locking rod 5 and the stop rod 7, the vertical state is maintained and continues to move forward;

3) Keep the truck moving forward until all the wheels 3 cross the threshold. The process of crossing the threshold is the same as steps 1) and 2). So far, the whole process of crossing the threshold is completed.

Claims (5)

1. the automatic transport trolley crossing threshold, comprise car body, handrail and wheel, described handrail installs the side in described car body, described wheel installs the bottom in car body by adapter shaft, it is characterized in that: also comprise latching device and tripper, described latching device is installed the bottom surface in car body and is hinged with the top of described adapter shaft, and the top in adapter shaft installed by described tripper, and the top of tripper is connected with latching device.

2. a kind of automatic transport trolley crossing threshold according to claim 1, it is characterized in that, described latching device comprises securing rod, lock bracket, position-limited lever and the first back-moving spring, described lock bracket is symmetrically arranged two " L " type supporting structures, lock bracket is fixed on the bottom surface of described car body, the top of described adapter shaft is arc surface, and adapter shaft is hinged by bearing pin and lock bracket; Described securing rod is each passed through the lock hole that described two " L " type supports are offered, and the two ends of described position-limited lever are connected with described two " L " type supports respectively, and described adapter shaft is located at vertical direction by described securing rod and position-limited lever; The two ends of described first back-moving spring are individually fixed on described securing rod and described bearing pin.

3. a kind of automatic transport trolley crossing threshold according to claim 2, it is characterized in that, described tripper comprises arc spring lamination, touching baffle plate and the second back-moving spring, the bottom of described arc spring lamination is fixed on described adapter shaft, the top of arc spring lamination is connected with described securing rod, the bottom of described touching baffle plate is fixed on adapter shaft, and the top of touching baffle plate is connected with one end of described second back-moving spring, and the other end of described second back-moving spring is connected with described bearing pin.

4. a kind of automatic transport trolley crossing threshold according to Claims 2 or 3, is characterized in that, described lock hole is the waist shaped hole vertically arranged.

5. a kind of automatic transport trolley crossing threshold according to claim 4, it is characterized in that, described wheel is cardan wheel.