A belt conveyor with adjustable conveying distance

Abstract

The present invention discloses a belt conveyor with adjustable conveying distance, which is characterized in that a belt transmission unit is provided. The main support is composed of two rectangular vertical frames. The top frame of the rectangular vertical frame is a rotating shaft, the bottom frame is a connecting rod, and the side frame is a support rod. The two rectangular vertical frames are connected by scissor frames symmetrically arranged on both sides to form a telescopic structure in which the two rectangular vertical frames can be opened and closed. A tensioning shaft is arranged between the two rectangular vertical frames. The tensioning shaft and the rotating shafts at the tops of the two rectangular vertical frames form a triangular distribution. The conveyor belt is enclosed into a triangular loop on the tensioning shaft and the rotating shafts at the tops of the two rectangular vertical frames. One of the rotating shafts is a driving shaft driven by a main motor, and the other rotating shaft is a driven shaft, constituting the belt transmission unit. The adjacent belt transmission units are arranged one by one in the conveying direction, and a connecting rod is arranged between a pair of adjacent support rods in the adjacent belt transmission units for connection to realize the series connection between the belt transmission units.

Description

Technical Field

[0001] The present invention relates to a belt conveying device, and more particularly to a driven self-tightening stepless telescopic belt conveyor. Background Art

[0002] Belt conveyors are essential automated mechanical equipment in industrial production. Traditional belt conveyors consist of rollers and belts, and their length cannot be adjusted. Especially when the conveying distance is long or the goods are heavy, the long-distance conveyor belt will inevitably sag, resulting in problems with blocked transmission. Although there are already conveyors with adjustable length as shown in Figure 3 In the figure, a first-stage telescopic belt 22 is provided on a frame 25, and a second-stage telescopic belt 23 that can be pushed forward and backward is provided below the first-stage telescopic belt 22. A third-stage telescopic belt 24 that can be pushed forward and backward can also be provided below the second-stage telescopic belt 23. The adjacent two-stage telescopic belts are stacked on top of each other, and the stacked length determines the adjustable distance of the transmission. The goods 21 are sequentially conveyed forward through each stage of the telescopic belt and freely fall into the lower-stage telescopic belt when passing through the adjacent two-stage telescopic belts. This falling situation greatly limits the application scenarios. Summary of the Invention

[0003] The present invention aims to avoid the deficiencies of the above-mentioned prior art and provides a belt conveyor with an adjustable conveying distance, realizing the adjustment of the conveying distance while maintaining the same conveying height.

[0004] The present invention adopts the following technical solutions to solve the technical problems:

[0005] The belt conveyor with an adjustable conveying distance of the present invention is characterized in that a belt conveying unit is provided. The main support is composed of two rectangular vertical frames. The top frame of the rectangular vertical frame is a rotating shaft, the bottom frame is a connecting rod, and the side frame is a support rod. The two rectangular vertical frames are connected by symmetric scissor frames on both sides, forming a telescopic structure that can be opened and closed by the two rectangular vertical frames. A tensioning shaft is provided between the two rectangular vertical frames. The tensioning shaft and the rotating shafts at the tops of the two rectangular vertical frames form a triangular distribution. The conveying belt is enclosed in a triangular loop on the tensioning shaft and the rotating shafts at the tops of the two rectangular vertical frames. One of the rotating shafts is a driving shaft driven by a main motor, and the other rotating shaft is a driven shaft, constituting the belt conveying unit. The adjacent belt conveying units are arranged one by one in the conveying direction, and a connecting rod is provided between a pair of adjacent support rods in the adjacent belt conveying units to realize the series connection between the belt conveying units.

[0006] The features of the belt conveyor with adjustable conveying distance of the present invention also lie in that: the scissors frame is composed of two hinged rods hinged at the middle with a pin shaft to form a symmetrical structure. The top ends of the two hinged rods are respectively hinged at the shaft ends of the rotating shafts on the rectangular vertical frames. The bottom ends of the two hinged rods are connected with a horizontal pin, and the horizontal pin is movably fitted in the vertical chute opened on the support rod and can slide up and down along the vertical chute. Corresponding to the increase in the distance between the two rectangular vertical frames, the horizontal pin moves upward; corresponding to the decrease in the distance between the two rectangular vertical frames, the horizontal pin moves downward.

[0007] The features of the belt conveyor with adjustable conveying distance of the present invention also lie in that: rollers are installed at the bottoms of the two rectangular vertical frames.

[0008] The features of the belt conveyor with adjustable conveying distance of the present invention also lie in that: a photoelectric sensor is arranged at the shaft end of the passive shaft for real-time monitoring of the tension degree of the conveyor belt.

[0009] The features of the belt conveyor with adjustable conveying distance of the present invention also lie in that: an upright "U"-shaped frame composed of a bottom cross bar and two side vertical bars is arranged between the two rectangular vertical frames. There are vertical chutes in the two side vertical bars, and the pin shaft is slidably fitted in the vertical chutes. A tensioning motor is arranged on the bottom cross bar, and the tensioning shaft is driven by the tensioning motor through a tensioning transmission mechanism to keep the conveyor belt in a tensioned state.

[0010] The features of the belt conveyor with adjustable conveying distance of the present invention also lie in that: the tensioning transmission mechanism is a gear and rack transmission mechanism; the tensioning motor drives the vertical racks arranged on both sides of the "U"-shaped frame through gears, so that the vertical racks can move up and down. The tensioning shaft is fixedly arranged at the top of the vertical rack by bearings and realizes tensioning adjustment by moving up and down with the vertical rack.

[0011] Compared with the prior art, the beneficial effects of the present invention are embodied in:

[0012] 1. The present invention realizes the adjustment of the conveying distance while maintaining the same conveying height, which is a completely new form of the belt conveyor with adjustable distance and has a wide application prospect;

[0013] 2. Since the conveying span of each belt conveying unit of the present invention is small, the situation of the belt sagging vertically is greatly improved;

[0014] 3. The present invention is provided with a tensioning motor, and the tension degree of the transmission belt can be effectively guaranteed through the tensioning belt;

[0015] 4. The present invention is provided with a photoelectric sensor for real-time monitoring of the tension degree of the conveyor belt, and can realize the automatic adjustment of the tensioning shaft for the tension degree of the conveyor belt through the tensioning motor, which greatly guarantees the working reliability of the conveyor and reduces the equipment maintenance workload.

[0016] 5. The unit of the present invention is set such that each unit can be independently replaced. By independent replacement, the normal operation time of the equipment can be guaranteed, and the operation cost of the setting can be greatly reduced.

[0017] 6. The present invention realizes the on-line adjustment of the conveying distance on the production line by connecting with the front-end and rear-end equipment; when the front-end or rear-end equipment forms extrusion or pulling on the belt conveyor of the present invention due to position adjustment, the belt conveyor of the present invention can adaptively adjust its own conveying distance to adapt to the change of the position of the on-site equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the belt conveying unit of the present invention;

[0019] Figure 2 It is a schematic structural diagram of the connection between the belt conveying units of the present invention;

[0020] Figure 3 It is a schematic structural diagram of a conveyor with a telescopic length in the prior art;

[0021] Reference numerals in the figure: 1 main motor, 2 conveyor belt, 3 driven shaft, 4 driving shaft, 5 photoelectric sensor, 6 scissor frame, 7 pin shaft, 8 support rod, 9 vertical rack, 10 roller, 11 tensioning motor, 12 is a "U" - shaped frame, 13 tensioning shaft, 14 connecting rod, 15 horizontal pin, 21 goods, 22 first - stage telescopic belt, 23 second - stage telescopic belt, 24 third - stage telescopic belt, 25 frame. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Refer to Figure 1 and Figure 2 , in this embodiment, the structural form of the belt conveyor with adjustable conveying distance is as follows: a belt conveying unit is set, and the main support is composed of two rectangular vertical frames. The top frame of the rectangular vertical frame is a rotating shaft, the bottom frame is a connecting rod, and the side frame is a support rod 8; the two rectangular vertical frames are connected by symmetric scissor frames 6 on both sides to form a telescopic structure that can be opened and closed for the two rectangular vertical frames. A tensioning shaft 13 is arranged between the two rectangular vertical frames, and the tensioning shaft 13 and the rotating shafts at the tops of the two rectangular vertical frames form a triangular distribution. The conveyor belt 2 is enclosed into a triangular loop on the tensioning shaft 13 and the rotating shafts at the tops of the two rectangular vertical frames. One of the rotating shafts is set as a driving shaft 4 driven by the main motor 1, and the other rotating shaft is a driven shaft 3, thus constituting the belt conveying unit; in order to facilitate the adjustment and movement of the belt conveying unit, rollers 10 are installed at the bottoms of the two rectangular vertical frames.

[0023] As Figure 2 shown, the adjacent belt conveying units are arranged one by one in the conveying direction, and a connecting rod 14 is arranged between a pair of adjacent support rods 8 in the adjacent belt conveying units for connection, realizing the series connection between the belt conveying units.

[0024] In specific implementation, corresponding technical measures also include:

[0025] The scissors frame 6 is composed of two hinged rods hinged at the middle with a pin shaft 7 to form a symmetrical structure. The top ends of the two hinged rods are respectively hinged to the shaft ends of the rotating shafts on the rectangular vertical frames. The bottom ends of the two hinged rods are connected with a horizontal pin 15. The horizontal pin 15 is movably fitted in the vertical sliding groove opened on the support rod 8 and can slide up and down along the vertical sliding groove. Corresponding to the increase in the distance between the two rectangular vertical frames, the horizontal pin 15 moves upward; corresponding to the decrease in the distance between the two rectangular vertical frames, the horizontal pin 15 moves downward.

[0026] In specific implementation, corresponding technical measures also include:

[0027] An optoelectronic sensor 5 is arranged at the shaft end of the driven shaft 3 for real-time monitoring of the tension degree of the conveyor belt 2.

[0028] An upright "U"-shaped frame 12 composed of a bottom cross bar and two side vertical bars is arranged between the two rectangular vertical frames. The "U"-shaped frame can be supported by the support rod 8. There are vertical sliding grooves in the two side vertical bars. The pin shaft 7 is slidably fitted in the vertical sliding grooves. A tensioning motor 11 is arranged on the bottom cross bar. The tensioning motor 11 drives the tensioning shaft 13 through a tensioning transmission mechanism to keep the conveyor belt 2 in a tensioned state; the tensioning transmission mechanism is a gear and rack transmission mechanism; the tensioning motor 11 drives the vertical racks 9 arranged on both sides of the "U"-shaped frame through gears, so that the vertical racks 9 can move up and down. The tensioning shaft 13 is fixedly arranged at the top of the vertical rack 9 by bearings and realizes tensioning adjustment by moving up and down with the vertical rack.

[0029] When the front-end or rear-end equipment forms extrusion on the belt conveyor of the present invention due to position adjustment, the main bracket is compressed, and the two rectangular vertical frames including their support rods 8 are relatively close to each other. The scissors frame 6 is deformed accordingly, causing the pin shaft 7 to move downward. The optoelectronic sensor 5 will monitor that the conveyor belt 2 is loose. The tensioning motor 11 drives the tensioning shaft 13 to move downward through the tensioning transmission mechanism until the conveyor belt 2 is tensioned again; at this time, the optoelectronic sensor 5 will also monitor that the conveyor belt 2 is no longer loose and maintains the torque, thereby maintaining the tension degree of the conveyor belt 2.

[0030] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A belt conveyor with adjustable conveying distance, characterized in that A belt conveyor unit is provided. The main support is composed of two rectangular vertical frames. The top frame of the rectangular vertical frame is a rotating shaft, the bottom frame is a connecting rod, and the side frame is a support rod. The two rectangular vertical frames are connected by symmetric scissor frames on both sides to form a telescopic structure in which the two rectangular vertical frames can be opened and closed. A tensioning shaft is arranged between the two rectangular vertical frames. The tensioning shaft and the rotating shafts at the tops of the two rectangular vertical frames form a triangular distribution. The conveyor belt is enclosed in a triangular loop on the tensioning shaft and the rotating shafts at the tops of the two rectangular vertical frames. One of the rotating shafts is a driving shaft driven by a main motor, and the other rotating shaft is a driven shaft, thus constituting the belt conveyor unit. Adjacent belt conveyor units are arranged one by one in the conveying direction, and a connecting rod is arranged between a pair of adjacent support rods in adjacent belt conveyor units for connection to realize the series connection between each belt conveyor unit. The scissor frame is composed of two articulated rods articulated in the middle by a pin shaft (7) to form a symmetric structure. The tops of the two articulated rods are respectively articulated at the shaft ends of the rotating shafts on the rectangular vertical frames. The bottoms of the two articulated rods are connected with a horizontal pin. The horizontal pin is movably fitted in a vertical chute opened on the support rod and can slide up and down along the vertical chute. Corresponding to the increase in the distance between the two rectangular vertical frames, the horizontal pin moves upward; corresponding to the decrease in the distance between the two rectangular vertical frames, the horizontal pin moves downward. Rollers (10) are installed at the bottoms of the two rectangular vertical frames. A photoelectric sensor is arranged at the shaft end of the driven shaft (3) for real-time monitoring of the tension degree of the conveyor belt (2). An upright "U"-shaped frame (12) composed of a bottom cross bar and two side vertical bars is arranged between the two rectangular vertical frames. There are vertical chutes in the two side vertical bars, and the pin shaft (7) is slidably fitted in the vertical chutes. A tensioning motor (11) is arranged on the bottom cross bar, and the tensioning motor (11) drives the tensioning shaft (13) through a tensioning transmission mechanism to keep the conveyor belt (2) in a tensioned state.

2. The belt conveyor with adjustable conveying distance according to claim 1, characterized in that: The tensioning transmission mechanism is a gear and rack transmission mechanism; the tensioning motor (11) drives the vertical racks (9) arranged on both sides of the "U"-shaped frame through gears, so that the vertical racks (9) can move up and down. The tensioning shaft (13) is fixedly arranged at the top of the vertical rack (9) by bearings and realizes tensioning adjustment by moving up and down with the vertical rack (9).

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