A building construction unloading device

Abstract

The application discloses a building construction unloading device and relates to the technical field of material conveying, which comprises a machine shell used for being fixedly connected in a spiral conveyor, a first rotating shaft and a second rotating shaft are sealingly and rotatably installed on the machine shell, the first rotating shaft and the second rotating shaft are drivingly connected through a gear assembly, one end of the first rotating shaft located outside the machine shell is fixedly connected with a main shaft of the spiral conveyor in a coaxial mode, and the first rotating shaft is coaxially arranged with a discharging port of the spiral conveyor; a third rotating shaft is coaxially sleeved on the second rotating shaft, spiral leaves are arranged on the third rotating shaft, the spiral leaves are matched in the discharging port of the spiral conveyor, and a rotation prevention mechanism is arranged between the third rotating shaft and the second rotating shaft; the first rotating shaft and the third rotating shaft are drivingly connected through a cam mechanism; the building construction unloading device realizes timely unloading of the spiral conveyor, improves unloading efficiency, avoids material storage at a terminal end of the spiral conveyor and extrusion dehydration, and influences material quality.

Description

Technical Field

[0001] The present invention relates to the technical field of material transportation, in particular to a construction unloading device. Background Art

[0002] In construction, a large amount of concrete is used, and concrete is usually transported using a screw conveyor. The main body of the screw conveyor includes a shell, one end of the shell is provided with an upper opening for feeding, and the other end of the shell is provided with a lower opening for unloading; a drive shaft with spiral blades is installed in the shell, and the drive shaft is connected to the motor. The motor drives the drive shaft, and the spiral blades rotate to transport the material.

[0003] Existing screw conveyors use spiral blades to spin and compress materials during the process of conveying concrete, causing the originally evenly mixed concrete to dehydrate, making some concrete less mixable and affecting the quality of the building. On the other hand, since the viscosity of concrete varies after mixing, once the viscosity increases, it will lead to unloading problems and cause blockages. Furthermore, the discharge port of the screw conveyor is open, causing the residual concrete to solidify easily, making it time-consuming and labor-intensive to clean up. Summary of the Invention

[0004] The purpose of the present invention is to provide a construction unloading device, aiming to solve the technical problem of low unloading efficiency of screw conveyors in the prior art.

[0005] In order to solve the above technical problems, the technical solution of the present invention is:

[0006] A construction unloading device includes a casing for being fixedly connected to a screw conveyor, a first rotating shaft and a second rotating shaft are sealed and rotatably mounted on the casing, one end of the first rotating shaft located in the casing is connected to the other end of the second rotating shaft located in the casing through a gear assembly, one end of the first rotating shaft located outside the casing is coaxially fixedly connected to the main shaft of the screw conveyor, and the first rotating shaft is coaxially arranged with the discharge port of the screw conveyor; the second rotating shaft is a hollow shaft, and a third rotating shaft is coaxially sleeved in the second rotating shaft, and the third rotating shaft is provided with spiral leaves, which fit in the discharge port of the screw conveyor, and an anti-rotation mechanism is provided between the third rotating shaft and the second rotating shaft; the first rotating shaft and the third rotating shaft are connected through a cam mechanism, and as the first rotating shaft rotates, the third rotating shaft slides axially in the second rotating shaft.

[0007] The anti-rotation mechanism includes a slider located on the inner wall of the second rotating shaft, a first sliding groove is opened on the outer wall of the third rotating shaft along the axial direction, and the slider is slidably connected in the first sliding groove.

[0008] Among them, the anti-rotation mechanism includes a connecting shaft vertically fixed to the inner wall of the second rotating shaft. There are multiple connecting shafts, and the multiple connecting shafts are arranged at intervals along the axial direction of the second rotating shaft. A guide wheel is rotatably installed on the connecting shaft, and a second sliding groove is opened on the outer wall of the third rotating shaft along the axial direction, and the guide wheel is engaged in the second sliding groove.

[0009] Among them, a plurality of connecting shafts are arranged in two rows along the width direction of the second sliding groove.

[0010] Among them, the two rows of connecting shafts are arranged in a staggered manner.

[0011] Among them, the anti-rotation mechanism includes a retaining frame, a mounting groove is opened on the inner wall of the second rotating shaft, the retaining frame is fixed in the mounting groove, and several balls are installed on the retaining frame. A third sliding groove is opened on the outer wall of the third rotating shaft along the axial direction, and the balls are fitted in the third sliding groove.

[0012] Wherein, a flexible bellows is sleeved on the third rotating shaft, the bottom end of the flexible bellows is fixedly connected to the third rotating shaft, and the top end of the flexible bellows is fixedly connected to the bottom of the casing.

[0013] Among them, the cam mechanism includes an equal-width frame and a triangular cam fitted in the equal-width frame. The triangular cam is eccentrically fixed to the first rotating shaft. The top of the equal-width frame is connected to a guide rod, which is slidably connected to the casing. One end of the third rotating shaft is located in the casing and is rotatably connected to the bottom end of the equal-width frame.

[0014] After adopting the above technical solution, the beneficial effects of the present invention are:

[0015] 1. The present invention can be detachably mounted on a conventional screw conveyor. When the screw conveyor conveys materials, it drives the spiral blades at the discharge port to rotate synchronously. At the same time, under the transmission of the cam mechanism, the third rotating shaft is synchronously extended and retracted, so that the spiral blades can move axially to push the materials while rotating to convey the materials, thereby quickly discharging the materials at the terminal end of the screw conveyor, realizing timely unloading of the screw conveyor, improving unloading efficiency, and avoiding the accumulation of materials and being squeezed and dehydrated, which affects the material quality.

[0016] 2. The anti-rotation mechanism is designed in the form of a single row or multiple rows of guide wheels. When the third rotating shaft slides up and down, the guide wheels roll synchronously in the second slide groove. At this time, the wheel surface of the guide wheel is in contact with one side wall of the second slide groove, which effectively reduces the friction between the third rotating shaft and the second rotating shaft, making the vertical sliding of the third rotating shaft smoother, avoiding the third rotating shaft and the second rotating shaft from getting stuck relative to each other, and improving the fluency and stability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of a construction unloading device according to a first embodiment of the present invention;

[0018] Figure 2 for Figure 1 Schematic diagram of the structure of the middle cam mechanism and the third rotating shaft;

[0019] Figure 3 for Figure 1 A sectional view of the second rotating shaft;

[0020] Figure 4 This is a cross-sectional view of the second rotating shaft in the second embodiment of a construction unloading device of the present invention;

[0021] Figure 5 This is a cross-sectional view of the second rotating shaft in the third embodiment of a construction unloading device of the present invention;

[0022] In the figure, 1- screw conveyor, 10- main shaft, 11- discharge port, 2- housing, 20- first rotating shaft, 200- first bevel gear, 21- second rotating shaft, 210- second bevel gear, 211- slider, 212- connecting shaft, 213- guide wheel, 214- mounting groove, 215- retaining frame, 216- ball, 22- third rotating shaft, 220- spiral blade, 221- first slide groove, 222- flexible bellows, 223- rotating block, 3- cam mechanism, 30- equal width frame, 300- guide rod, 301- rotating sleeve, 302- limiting ring, 31- triangular cam. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings.

[0024] The orientations mentioned in this specification are based on the orientations of the construction unloading device of the present invention during normal operation, and do not limit the orientations during storage and transportation. They only represent relative positional relationships, not absolute positional relationships.

[0025] Example 1:

[0026] like Figures 1 to 3 As shown together, the construction unloading device is used to be connected to the screw conveyor 1, and includes a housing 2, a first rotating shaft 20, a second rotating shaft 21, a third rotating shaft 22, spiral blades 220, an anti-rotation mechanism and an equal-width cam mechanism 3.

[0027] The casing 2 is fixed inside the terminal end of the screw conveyor 1. The first rotating shaft 20 and the second rotating shaft 21 are both rotatably connected to the casing 2 through sealed bearings. A gear assembly is provided in the casing 2. The gear assembly includes a first bevel gear 200 and a second bevel gear 210 that are meshed with each other. The first bevel gear 200 is coaxially fixedly connected to the first rotating shaft 20, and the second bevel gear 210 is coaxially fixedly connected to the second rotating shaft 21, so that the first rotating shaft 20 and the second rotating shaft 21 can rotate synchronously.

[0028] The first rotating shaft 20 is coaxially arranged with the main shaft 10 of the screw conveyor 1, and the two are fixedly connected by a coupling or a flange assembly, so that when the main shaft 10 rotates, the first rotating shaft 20 can be driven to rotate synchronously;

[0029] The second rotating shaft 21 is coaxially arranged with the discharge port 11 of the screw conveyor 1. The second rotating shaft 21 is a hollow shaft. The third rotating shaft 22 is coaxially sleeved within the second rotating shaft 21. The shaft section of the third rotating shaft 22 located outside the second rotating shaft 21 is located within the discharge port 11 of the screw conveyor 1. The spiral blade 220 is fixed to the third rotating shaft 22 and has a clearance fit within the discharge port 11 of the screw conveyor 1. In this embodiment, the first rotating shaft 20 and the third rotating shaft 22 are both welded together from two shaft sections of different diameters.

[0030] The third rotating shaft 22 is sleeved within the second rotating shaft 21, allowing the third rotating shaft 22 to rotate or slide relative to the second rotating shaft 21. An anti-rotation mechanism is provided between the second rotating shaft 21 and the third rotating shaft 22 to prevent relative rotation therebetween. In this embodiment, the anti-rotation mechanism includes a slider 211 located on the inner wall of the second rotating shaft 21, and a first slide groove 221 is provided on the outer wall of the third rotating shaft 22 in the axial direction. The slider 211 is connected to the first slide groove 221. When the third rotating shaft 22 slides axially, the slider 211 can only slide synchronously within the first slide groove 221, thereby achieving an anti-rotation function. This allows the third rotating shaft 22 to rotate synchronously when the main shaft 10 of the screw conveyor 1 rotates.

[0031] The cam mechanism 3 is used for the transmission connection between the first rotating shaft 20 and the third rotating shaft 22. In this embodiment, the cam mechanism 3 is an intermittent movement mechanism of equal-width cams, specifically comprising an equal-width frame 30 and a triangular cam 31 fitted within the equal-width frame 30. The first rotating shaft 20 is vertically fixed to a plate surface at one corner of the triangular cam 31. The top of the equal-width frame 30 is connected to a guide rod 300, which is slidably connected to the housing 2. When the first rotating shaft 20 rotates, it drives the triangular cam 31 to rotate eccentrically, thereby driving the equal-width frame 30 to rise and fall back. The bottom end of the equal-width frame 30 is provided with a rotating sleeve 301, within which a rotating block 223 is fitted. A limit ring 302 is connected to the bottom end of the rotating sleeve 301. Under the restraining action of the limit ring 302, the rotating block 223 will not fall out of the rotating sleeve 301. The end of the third rotating shaft 22 located within the housing 2 is fixedly connected to the rotating block 223. The reciprocating movement of the equal-width frame 30 drives the third rotating shaft 22 to rise and fall synchronously. When the third rotating shaft 22 is rotating, the rotating block 223 rotates synchronously within the rotating sleeve 301 without affecting the movement of the equal-width frame 30. In other embodiments, other cam structures, such as cam rocker mechanisms and grooved cam mechanisms, are also applicable. Furthermore, a spherical sleeve and a mating spherical body can also be used to achieve a rotational connection between the third rotating shaft 22 and the equal-width frame 30.

[0032] During operation, the screw conveyor 1 conveys material to the terminal end. The main shaft 10 of the screw conveyor 1 rotates, thereby driving the third rotating shaft 22 to rotate, achieving synchronous rotation of the spiral blades 220, so that the spiral blades 220 can continuously convey the material at the terminal end outward. At the same time, under the drive of the cam mechanism 3, the third rotating shaft 22 can be synchronously extended and retracted, so that the spiral blades 220 can simultaneously rotate to convey the material and move axially to push the material, thereby quickly discharging the material at the terminal end. This achieves timely unloading of the screw conveyor 1 and prevents the material from accumulating at the terminal end and being squeezed and dehydrated, which affects the material quality.

[0033] Furthermore, a flexible bellows 222 is sleeved on the third rotating shaft 22, the bottom end of the flexible bellows 222 is fixedly connected to the third rotating shaft 22, and the top end of the flexible bellows 222 is fixedly connected to the bottom of the casing 2. The sealing function of the flexible bellows 222 is used to seal the fitting between the second rotating shaft 21 and the third rotating shaft 22 to prevent impurities from entering; due to the elastic and telescopic characteristics of the flexible bellows 222, when the third rotating shaft 22 moves relative to the second rotating shaft 21, the flexible bellows 222 still has a sealing function.

[0034] Example 2:

[0035] The difference between this embodiment and the first embodiment is that Figure 4 As shown, the anti-rotation mechanism includes a connecting shaft 212 vertically fixed to the inner wall of the second rotating shaft 21. There are multiple connecting shafts 212, which are arranged at intervals along the axial direction of the second rotating shaft 21. Guide wheels 213 are rotatably mounted on the connecting shaft 212, so that the multiple guide wheels 213 are vertically arranged in a row. A second sliding groove is formed on the outer wall of the third rotating shaft 22 along the axial direction. When the third rotating shaft 22 is sleeved in the second rotating shaft 21, the guide wheels 213 are loosely fitted in the second sliding groove. When the third rotating shaft 22 slides up and down, the guide wheels 213 roll synchronously in the second sliding groove. At this time, the wheel surface of the guide wheel 213 abuts against a side wall of the second sliding groove, effectively reducing the friction between the third rotating shaft 22 and the second rotating shaft 21 during the rotation of the third rotating shaft 22 driven by the second rotating shaft 21, making the vertical sliding of the third rotating shaft 22 smoother and preventing the third rotating shaft 22 and the second rotating shaft 21 from getting stuck relative to each other.

[0036] Furthermore, two rows of connecting shafts 212 are arranged along the width direction of the second slide groove, and the two rows of guide wheels 213 can act synchronously on the two sides of the second slide groove respectively, so that the cooperation between the guide wheels 213 and the second slide groove is tighter and more stable, avoiding the problem of slight shaking of the third rotating shaft 22 relative to the second rotating shaft 21.

[0037] Furthermore, the two rows of connecting shafts 212 are staggered so that the guide wheels 213 in one row of the two rows of guide wheels 213 can partially enter the gap between the two adjacent guide wheels 213 in the other row. Under the premise that the diameter of the guide wheels 213 is fixed, the overall width of the guide wheels 213 arranged in the two rows is small and the structure is more compact.

[0038] Example 3:

[0039] The difference between this embodiment and the first embodiment is that Figure 5 As shown, the anti-rotation mechanism includes a retainer 215 and a plurality of balls 216. The retainer 215 is a linear structure with a plurality of spaced pockets. The balls 216 are loosely fitted within the pockets. A mounting groove 214 is defined on the inner wall of the second rotating shaft 21. The retainer 215 is fixedly attached to the mounting groove 214. A third chute is defined along the axial direction on the outer wall of the third rotating shaft 22. The balls 216 fit within the third chute. The rolling of the balls 216 reduces the friction between the balls 216 and the inner wall of the third chute, allowing the third rotating shaft 22 to slide smoothly vertically and preventing the third rotating shaft 22 from becoming stuck relative to the second rotating shaft 21.

[0040] The present invention is not limited to the above-mentioned specific implementation methods. Various changes made by ordinary technicians in this field based on the above-mentioned concept without creative work are all within the scope of protection of the present invention.

Claims

1. A construction unloading device, comprising a housing for fixing to a screw conveyor, characterized in that: A first rotating shaft and a second rotating shaft are sealed and rotatably mounted on the casing, one end of the first rotating shaft located inside the casing and one end of the second rotating shaft located inside the casing are transmission-connected via a gear assembly, one end of the first rotating shaft located outside the casing is coaxially fixedly connected to the main shaft of the screw conveyor, and the first rotating shaft is coaxially arranged with the discharge port of the screw conveyor; The second rotating shaft is a hollow shaft, a third rotating shaft is coaxially sleeved inside the second rotating shaft, the third rotating shaft is provided with a spiral blade, the spiral blade is engaged in the discharge port of the screw conveyor, and an anti-rotation mechanism is provided between the third rotating shaft and the second rotating shaft; The first rotating shaft and the third rotating shaft are connected by a cam mechanism, and as the first rotating shaft rotates, the third rotating shaft slides axially inside the second rotating shaft; The gear assembly includes a first bevel gear and a second bevel gear that are meshed with each other, the first bevel gear is coaxially fixedly connected to the first rotating shaft, and the second bevel gear is coaxially fixedly connected to the second rotating shaft; A flexible bellows is sleeved on the third rotating shaft, the bottom end of the flexible bellows is fixedly connected to the third rotating shaft, and the top end of the flexible bellows is fixedly connected to the bottom of the housing; The screw conveyor drives the cam mechanism and the spiral blades on the third rotating shaft to rotate synchronously. Under the transmission of the cam mechanism, the third rotating shaft drives the spiral blades to move back and forth, thereby realizing the combined motion of the spiral blades rotating around the axis to convey the material and moving back and forth along the axial direction to push the material, thereby preventing the squeezing and dehydration of the material by the rotational motion alone; The anti-rotation mechanism is used to prevent the second rotating shaft and the third rotating shaft from rotating relative to each other, and the anti-rotation mechanism adopts a slider sliding groove structure, a guide wheel sliding groove structure, or a ball sliding groove structure; When the anti-rotation mechanism adopts a guide wheel slide groove structure, the anti-rotation mechanism includes a connecting shaft vertically fixed to the inner wall of the second rotating shaft, the connecting shaft is provided with a plurality of connecting shafts, and the plurality of connecting shafts are arranged at intervals along the axial direction of the second rotating shaft, a guide wheel is rotatably mounted on the connecting shaft, and a second slide groove is opened on the outer wall of the third rotating shaft along the axial direction, and the guide wheel is engaged in the second slide groove; The plurality of connecting shafts are arranged in two rows along the width direction of the second chute; The two rows of connecting shafts are arranged in a staggered manner, with the guide wheels of one row partially entering the gap between two adjacent guide wheels of the other row.

2. A construction unloading device according to claim 1, characterized in that: When the anti-rotation mechanism adopts a slider slot structure, the anti-rotation mechanism includes a slider located on the inner wall of the second rotating shaft, a first slot is opened on the outer wall of the third rotating shaft along the axial direction, and the slider is slidably connected in the first slot.

3. A construction unloading device according to claim 1, characterized in that: When the anti-rotation mechanism adopts a ball slide groove structure, the anti-rotation mechanism includes a retaining frame, a mounting groove is provided on the inner wall of the second rotating shaft, the retaining frame is fixed in the mounting groove, a plurality of balls are installed on the retaining frame, and a third slide groove is provided on the outer wall of the third rotating shaft along the axial direction, and the balls are fitted in the third slide groove.

4. A construction unloading device according to claim 1, characterized in that: The cam mechanism includes an equal-width frame and a triangular cam fitted in the equal-width frame. The triangular cam is eccentrically fixed to the first rotating shaft. The top of the equal-width frame is connected to a guide rod, and the guide rod is slidably connected to the housing. One end of the third rotating shaft located in the housing is rotatably connected to the bottom end of the equal-width frame.

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