CN105584857A - Cargo loading and unloading platform based on multi-rod mechanisms and conveying belt - Google Patents

Abstract

The invention relates to a cargo loading and unloading platform based on a multi-bar mechanism and a conveyor belt. The purpose is that the provided device should have the characteristics of high degree of automation, high working efficiency, small occupied space and convenient use. The technical solution is: a cargo loading and unloading platform based on a multi-bar mechanism and a conveyor belt, including a platform capable of carrying heavy objects, a fork frame that drives the platform to move vertically up and down, a power mechanism that drives the fork frame, and a load carrying all the above-mentioned components with a belt. A base with wheels; it is characterized in that: the platform includes a second four-bar mechanism that is movable and driven by a third four-bar mechanism, and a conveyor belt assembly for driving goods is also set in the support plate at the bottom of the platform, and the conveyor belt assembly is driven by The mechanism is driven by a transmission mechanism.

Description

Cargo loading and unloading platform based on multi-bar mechanism and conveyor belt

technical field

The invention relates to a loading and unloading device, in particular to a cargo loading and unloading platform.

Background technique

Cargo handling, especially moving goods from low to high (such as bagged goods, boxed goods), the conventional way is to use a crane or a belt conveyor that is inclined from low to high. However, the use of cranes requires auxiliary tools such as hanging baskets or slings, resulting in a large workload and low work efficiency; arranging belt conveyors requires a large space, which cannot be used if the site is cramped.

Contents of the invention

The purpose of the present invention is to overcome the shortcomings in the above background technology and provide an improvement of a loading and unloading device, which should have the characteristics of high automation, high work efficiency, small space occupation and convenient use.

Technical scheme of the present invention is:

A cargo handling platform based on a multi-bar mechanism and a conveyor belt, including a platform that can carry heavy objects, a fork frame that drives the platform to move vertically up and down, a power mechanism that drives the fork frame, and a base that carries all the aforementioned components and has wheels ; It is characterized in that: the platform includes a movable second four-bar mechanism driven by the third four-bar mechanism, a conveyor belt assembly for driving goods is also arranged in the support plate at the bottom of the platform, and the conveyor belt assembly is driven by the drive mechanism through the transmission mechanism drive;

The left side of the platform is the first roller platform hinged on the left side of the support plate through the first hinge shaft, and the right side of the platform is the second roller platform hinged on the right side of the support plate; A first four-bar mechanism for changing the angle of the platform is also configured;

The second four-bar mechanism is composed of the V-shaped cage of the first roller platform, the ejector rod, the V-shaped cage of the second roller platform, and the support plate; the third four-bar mechanism is composed of the V-shaped cage of the first roller platform. The shorter arm, connecting rod, right connecting rod and left connecting rod are sequentially hinged;

The left side of the support plate is hinged with the left connecting rod at the top of the fork frame through the first hinge shaft, and the right side of the support plate is hinged with the fork frame through the first four-bar mechanism; the first four-bar mechanism is hinged by the left side The connecting rod, the right connecting rod, the short connecting rod and the long connecting rod are sequentially hinged, and the second hinge shaft used to hinge the long connecting rod and the short connecting rod is also embedded in the chute in the support plate for sliding fit;

The above-mentioned fork frame, the first four-bar mechanism, the second four-bar mechanism and the third four-bar mechanism are respectively paired and arranged parallel to each other.

The transmission mechanism is a sprocket mechanism, and the sprockets in the sprocket mechanism are rotatably positioned at the ends of the hinged shafts of the relevant connecting rods in the scissor frame.

The conveyor belt assembly includes a left roller, a right roller, and a conveyor belt that transmits power between the left roller and the right roller; the first hinge shaft is the rotating shaft of the left roller, and a sprocket is fixed at one end of the rotating shaft; the second Hinged shaft is the rotating shaft of right cylinder.

The two second four-bar mechanisms are arranged in pairs, and several second roller platform rotating rollers are rotatably positioned between the two second roller platform V-shaped cages, and the two first roller platform V-shaped cages can be rotated. A number of first roller platform rollers are rotationally positioned.

The driving mechanism is a speed reducer and a second motor driving the speed reducer.

The power mechanism includes a pair of guide rails arranged horizontally for guidance, a push plate whose two ends are respectively hinged to the right end of the bottom of the scissor frame and moves horizontally through the guide rails, and a motor that drives the push plate through a screw assembly.

The working principle of the present invention is:

When the platform is in the lowest state, the conveyor belt and the second roller platform are placed flat (as shown in Figure 6). Put the item on the second roller platform and push it lightly, and then it can slide to the edge of the conveyor belt platform through the rotating roller. At this time, the rotating conveyor belt will Bring the items to the conveyor belt platform; then the scissor frame drives the conveyor belt platform to move vertically upwards, the first four-bar mechanism drives the conveyor belt platform to change the angle counterclockwise, and the second four-bar mechanism drives the first roller platform and the second roller platform counterclockwise Change the angle, and at the same time, the first roller platform, the conveyor belt platform and the second roller platform form a concave combination to prevent the goods from falling during the ascent process; when the platform is in the highest state, the first roller platform is laid flat (as shown in Figure 7). Due to the inclination of the conveyor belt and the platform, the goods will be transferred to the first roller platform that has been laid flat, and slide down to the target position; when the platform descends, it is the reverse process of the above process.

The beneficial effects of the present invention are:

With the invention, it is only necessary to push the goods into the platform, and the lifting and removal of the goods from the platform are all completed automatically without manual intervention, which is very convenient to use, not only greatly reduces the workload, but also reduces the labor intensity of the operators. It also improves work efficiency and reduces labor costs; in addition, it also has the advantage of taking up little space, and is generally welcomed by enterprises.

Description of drawings

Fig. 1 is a front view structural schematic diagram of the present invention.

Fig. 2 is a schematic diagram of the three-dimensional structure of the present invention.

Fig. 3 is a front structural schematic diagram of the first four-bar mechanism of the present invention.

Fig. 4 is a front structural schematic view of the second four-bar mechanism of the present invention.

Fig. 5 is a front structural schematic diagram of a third four-bar mechanism of the present invention.

Fig. 6 is a schematic perspective view of the three-dimensional structure of the base in the present invention.

Fig. 7 is a front structural schematic view of the platform of the present invention when it is at the lowest position.

Fig. 8 is a front structural schematic view of the platform of the present invention when it is at the highest position.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited to the following examples.

As shown in the figure, the cargo loading and unloading platform based on the multi-bar mechanism and the conveyor belt, the platform 1 is used to carry heavy objects, the scissor frame 2 is used to lift the platform to move up and down vertically, and the power mechanism is used to drive the scissor frame ((front and rear Two scissor frames are arranged in pairs parallel to each other)), and each of the aforementioned mechanisms is supported by the base 3 with wheels.

The bottom of the scissor frame is rotatably hinged on the base; as shown in the figure: two frame plates 3-1 arranged parallel to each other are horizontally fixed on the upper surface of the base (the frame plate is shaped on a chute 3-1-1 , as a guide rail), the bottom left end of the scissor frame is rotatably hinged on the left end of the frame plate 3-1; while the bottom right end of the scissor frame is hinged on the end of the push rod D, the hinge axis E is connected to the frame plate The chute is slidingly matched; the power mechanism applies force to the push rod to drive the scissors to move. In the power mechanism: a pair of sliding rods H used for guiding and parallel to the chute are arranged horizontally on the base, and the push rod is slidably sleeved on the sliding rod through the sliding hole (the sliding hole made on the push rod) Top; the motor 3-5 drives the lead screw C to rotate through the sprocket A and the chain B, and the nut fixed on the push rod and matched with the lead screw receives the thrust, and the push rod drives the scissor frame to move together.

Obviously, the above is similar to the existing fork type platform.

The improvement of the present invention is to add a conveyor belt platform on the traditional loading and unloading platform, and simultaneously configure a pair of first four-bar mechanisms (two first four-bar mechanisms before and after) for changing the angle of the conveyor belt platform between the underframe and the scissors mutually parallel to be arranged in pairs); This first four-bar mechanism is made up of the left side connecting rod 2-1, the right side connecting rod 2-2, the short connecting rod 2-4 and the long connecting rod 2-3 hinged in sequence.

The platform of the present invention also includes a first roller platform and a second roller platform capable of carrying heavy objects, wherein the third four-bar mechanism drives the first roller platform to change the angle, and the second four-bar mechanism drives the second roller platform to change the angle. And the driving of the second four-bar mechanism is realized by the third four-bar mechanism; the first roller platform and the second roller platform form the movable ribs on the left and right sides of the platform, and a conveyor belt assembly ( The power of the driving force mechanism is introduced through the transmission mechanism) to form a loading and unloading platform; it can be seen in the figure that the front and rear two second four-bar mechanisms are arranged in pairs parallel to each other, and each second four-bar mechanism includes sequentially hinged ejector rods 1- 1. V-shaped cage 1-2 of the first roller platform, support plate 1-3 (a chute 1-3-1 is formed on the support plate, and the second hinge shaft G can be embedded in the chute for sliding fit) and The V-shaped cage of the second roller platform 1-4; the two push rods are used as front and rear ribs to prevent the goods from falling; between the two V-shaped cages of the second roller platform, several first rollers are horizontally positioned rotatably Two roller platform turn rollers 1-4-1 (forming the rear loading and unloading platform), and between the two first roller platform V-shaped cages are rotatably positioned several first roller platform turn rollers 1-2-1 (forming the front loading and unloading platform). Loading and unloading platform); the structure of the second roller platform rotating roller includes a fixed shaft with both ends fixed on the V-shaped cage of the second roller platform and a tubular stick that is sleeved on the outside of the fixed shaft and rotatably positioned on the fixed shaft through bearings The first roller platform roller is also of the same structure (it also includes a fixed shaft fixed at both ends on the V-shaped cage of the first roller platform and a tubular tube that is sleeved outside the fixed shaft and rotatably positioned on the fixed shaft through bearings. stick cover). The conveyor belt assembly includes a left roller 1-3-2, a right roller 1-3-3, and a conveyor belt 1-3-4 that cooperates with the left roller and the right roller at the same time to transmit power; the rotating shaft of the left roller is the first One hinged shaft S (also can be two axles of coaxial suit), the rotating shaft of right cylinder is exactly described second hinged axle (also can be two axles of coaxial suit).

The V-shaped cage of the first roller platform is V-shaped, and the two arms are of different lengths and form a certain angle with each other (the angle is determined according to needs, and it is recommended to be 50-80 degrees); wherein, the longer arm is used as the second A bar in the four-bar mechanism (for supporting the first roller platform roller), the shorter arm 1-2-1 is used as a bar in the third four-bar mechanism.

It can be seen in the figure that the front and rear two third four-bar mechanisms are arranged in pairs parallel to each other. The rod and the left connecting rod are sequentially hinged (parallelogram as seen in the figure). Due to the effect of the third four-bar mechanism, the V-shaped cage of the first roller platform can gradually rotate counterclockwise around the hinge shaft during the platform rising process, and finally achieve the purpose of automatic unloading.

The left side of the support plate at the bottom of the platform is hinged with the left connecting rod at the top of the scissor frame through the rotating shaft of the left drum (i.e. the first hinge shaft), and the right side of the support plate is hinged with the scissor frame through the first four-bar mechanism (specifically through the support The chute that the right part of the plate is opened is slidably matched with the second hinge axis G).

The conveyor belt assembly introduces the power of the drive mechanism through the transmission mechanism; the transmission mechanism is a sprocket mechanism, and the sprocket wheel in the sprocket mechanism is rotatably positioned at the end of the hinge shaft of the relevant connecting rod in the scissor frame. Shown in the figure: the end of the rotating shaft of the left drum rotatably positions a sprocket, and the end of the hinge shaft F connecting the left connecting rod and the second right connecting rod 2-2 rotatably positions two sprockets (two chains) side by side. The end surfaces of the wheels are connected to each other and fixed), and the hinge shaft at the left end of the second right connecting rod (that is, the hinge shaft that hinges the second right connecting rod and the base) can rotatably locate a base sprocket Q (it can be seen in the figure that it is fixed on the output of the reducer On the shaft; after matching the chain, you can introduce power from the base to make the conveyor belt move. It can be seen in the figure that the power comes from the second motor 3-2, and the second motor inputs the power into the reducer 3-3 through the transmission mechanism, and the reducer outputs The base sprocket fixed on the shaft rotates, and the power transmission chain is formed.

Innovation point of the present invention:

1. A conveyor belt platform is added to the loading and unloading platform to facilitate the movement of goods on the platform.

2. The designed multi-bar mechanism includes three four-bar mechanisms, achieving the effect of one input and four outputs. Taking the rising as an example, they are: the rising of the loading and unloading platform (the loading and unloading platform can be regarded as composed of three platforms: the conveyor belt platform, the first roller platform and the second roller platform); the counterclockwise inclination of the conveyor belt platform; the first roller platform The counterclockwise inclination of the second roller platform; the counterclockwise inclination of the second roller platform.

3. When the loading and unloading platform is at the lowest position, the conveyor belt platform and the second roller platform are in a horizontal state;

4. When the loading and unloading platform is in the rising process, the conveyor belt platform, the first roller platform and the second roller platform are all inclined counterclockwise. At the same time, the first roller platform, the conveyor belt platform and the second roller platform form a concave combination to prevent the goods from falling during the ascent process.

5. When the loading and unloading platform is in the highest state, the first roller platform is in the horizontal state.

Claims (6)

1. A cargo loading and unloading platform based on a multi-rod mechanism and a conveyor belt, including a platform (1) capable of carrying heavy objects, a fork frame (2) that drives the platform to move vertically up and down, a power mechanism for driving the fork frame, and a load-carrying platform for the aforementioned A base (3) with all parts and wheels; it is characterized in that: the platform includes a second four-bar mechanism that is movable and driven by a third four-bar mechanism, and a support plate (1-3) at the bottom of the platform is also provided a conveyor belt assembly for driving goods, the conveyor belt assembly is driven by the drive mechanism through the transmission mechanism; The left side of the platform is the first roller platform hinged on the left side of the support plate through the first hinge shaft (S), and the right side of the platform is the second roller platform hinged on the right side of the support plate; A first four-bar mechanism for changing the angle of the platform is also arranged between the frames; The second four-bar mechanism is composed of the first roller platform V-shaped cage (1-2), the ejector rod (1-1), the second roller platform V-shaped cage (1-4) and the support plate hinged in sequence ; The third four-bar mechanism is composed of the shorter arm (1-2-1) of the V-shaped cage of the first roller platform, the connecting rod (1-2-2), the right connecting rod and the left connecting rod hinged in sequence ; The left side of the support plate is hinged with the left connecting rod (2-1) on the top of the fork frame by the first hinge shaft, and the right side of the support plate is hinged with the fork frame by the first four-bar mechanism; The rod mechanism is sequentially hinged by the left link (2-1), the right link (2-2), the short link (2-4) and the long link (2-3), which are used to hinge the long link The rod and the second hinged shaft (G) of the short connecting rod are also embedded in the chute in the support plate for sliding fit; The above-mentioned fork frame, the first four-bar mechanism, the second four-bar mechanism and the third four-bar mechanism are respectively paired and arranged parallel to each other. 2. The cargo loading and unloading platform based on a multi-bar mechanism and a conveyor belt according to claim 1, wherein the transmission mechanism is a sprocket mechanism, and the sprocket in the sprocket mechanism is rotatably positioned in the fork frame. The end of the connecting rod hinge shaft. 3. The cargo loading and unloading platform based on a multi-bar mechanism and a conveyor belt according to claim 1, wherein the conveyor belt assembly includes a left roller (1-3-2), a right roller (1-3-3) and The conveyor belt (1-3-4) that transmits power between the left drum and the right drum; the first hinge shaft is the rotation shaft of the left drum, and one end of the rotation shaft is also fixed with the base sprocket (Q); the second hinge Axle is the rotating shaft of right drum. 4. The cargo loading and unloading platform based on the multi-bar mechanism and the conveyor belt according to claim 1, characterized in that: two second four-bar mechanisms are arranged in pairs, and the V-shaped cage of the two second roller platforms is rotatable. Several second roller platform rollers (1-4-1) are positioned, and several first roller platform rollers (1-2-1) are rotatably positioned between the two first roller platform V-shaped cages . 5. The cargo loading and unloading platform based on the multi-bar mechanism and the conveyor belt according to claim 1, characterized in that: the driving mechanism is a reducer (3-3) and a second motor (3-2) driving the reducer. 6. The cargo loading and unloading platform based on multi-bar mechanism and conveyor belt according to claim 2 or 3 or 4 or 5, characterized in that: the power mechanism includes a pair of horizontally arranged guide rails for guiding, and the two ends are respectively connected to the shears. The right end of the bottom of the fork is hinged and the push plate (D) moves horizontally through the guide rail, and the motor (3-1) drives the push plate through the lead screw assembly.