Duck cage excrement cleaning device

Abstract

The utility model provides a duck cage excrement cleaning device which comprises a support, a conveying belt structure is arranged on the support in the length direction of a duck cage, the conveying belt structure is located below the duck cage, and the conveying belt structure comprises a fixed rotating roller and a sliding rotating roller which are arranged in parallel. The fixed rotating roller and the sliding rotating roller are jointly sleeved with a transmission belt, the fixed rotating roller is rotationally connected to the support, the sliding rotating roller is horizontally connected to the support in a sliding mode, and a guide belt scraping mechanism is arranged on the upper surface of a belt body on the lower portion of the transmission belt. A guiding and collecting mechanism is arranged on the support and located below the guiding and belt scraping mechanism. The device is reasonable in design, sundries conveyed from the upper surface of the belt body on the lower portion of the transmission belt are guided out of the transmission belt through the guiding belt scraping mechanism, then the sundries are guided to the collecting area on the lower portion through the guiding and collecting mechanism to be collected, the sundries in the transmission belt are removed, the sundries are prevented from making contact with a driven roller, and specialized poultry breeding is facilitated.

Description

Technical Field

[0001] This utility model relates to a device for cleaning up excrement in duck cages. Background Technology

[0002] Because the environment of the farm is relatively complex, there is a possibility that poultry feathers or other debris may fall into the excrement conveyor belt. That is, there is a possibility that debris may fall onto the upper surface of the lower conveyor belt. Once too much debris moves from the upper surface of the lower conveyor belt (the belt surface connected to the driven roller) to the driven roller, it can easily damage the surface of the driven roller, thereby affecting the conveying of the belt. Sometimes, it may even cause the connecting shaft between the driven roller and the duck cage support to jam. Utility Model Content

[0003] In view of this, the purpose of this utility model is to overcome the shortcomings of the prior art and provide a duck cage excrement cleaning device. The device is reasonably designed and uses a guide scraper mechanism to remove the debris conveyed from the upper surface of the lower part of the conveyor belt. Then, the debris is guided to the lower collection area by the guide collection mechanism, thus completing the removal of debris from the conveyor belt and avoiding contact between the debris and the driven roller, which is convenient for professional poultry farming.

[0004] This utility model is achieved using the following solution: a duck cage excrement cleaning device, including a support frame, a transmission belt structure arranged along the length of the duck cage on the support frame, the transmission belt structure being located below the duck cage, the transmission belt structure including a fixed rotating roller and a sliding rotating roller arranged in parallel, the fixed rotating roller and the sliding rotating roller being together sleeved within a transmission belt, the fixed rotating roller being rotatably connected to the support frame, the sliding rotating roller being horizontally slidably connected to the support frame, a guide scraping mechanism being arranged on the upper surface of the lower part of the transmission belt body, and a guide collection mechanism being arranged on the support frame below the guide scraping mechanism.

[0005] Furthermore, the sliding rotating roller is a driven roller that drives the lower part of the transmission belt to change direction upwards, and the fixed rotating roller is an active roller driven by a motor.

[0006] Furthermore, the sliding rotating roller includes a roller core, which is parallel to the fixed rotating roller. A rotating cylinder is rotatably connected to the outside of the roller core, and the transmission belt is sleeved on the outside of the rotating cylinder. The roller core is slidably connected to the support.

[0007] Furthermore, vertical sliding plates are installed at both ends of the roller core. The sliding plates are horizontally slidable on the bracket, and the lower edge of the sliding plate near the fixed rotating roller is connected to the guide scraper mechanism.

[0008] Furthermore, the guide scraping mechanism includes a horizontally arranged triangular frame, which is attached to the upper surface of the lower part of the transmission belt. The apex of the triangular frame faces the side of the fixed rotating roller, and the two bottom corners of the triangular frame are respectively connected to the sliding plates on the corresponding sides.

[0009] Furthermore, an outwardly folding fixing plate is provided on the lower edge of the sliding plate near the fixed rotating roller, the bottom corner of the triangular frame extends out of the transmission belt, and the folding fixing plate is connected to the corresponding bottom corner of the triangular frame by a U-shaped connecting plate.

[0010] Furthermore, the guiding and collecting mechanism includes inclined guide plates symmetrically arranged on both sides below the transmission belt. A horizontal guide plate sliding rod is provided on the bracket corresponding to the inclined guide plate. An L-shaped sliding plate is provided on the inclined upper edge of the inclined guide plate. The horizontal part of the L-shaped sliding plate is on top and the vertical part is on the bottom. The end of the horizontal part of the L-shaped sliding plate is connected to the inclined upper end of the inclined guide plate. The L-shaped sliding plate and the sliding plate form a trapezoidal sliding groove with the opening facing downward. The guide plate sliding rod is a trapezoidal cross-section rod provided corresponding to the trapezoidal sliding groove. The trapezoidal sliding groove is slidably connected to the guide plate sliding rod.

[0011] Furthermore, the lower end of the inclined guide plate is inclined toward the middle of the bracket, and the inclined guide plate is located below the bottom corner of the corresponding triangular frame. A collection tray is provided below the two inclined guide plates.

[0012] Furthermore, the bracket is provided with a horizontal sliding guide rod corresponding to the sliding plate. The horizontal sliding guide rod is a square rod. The upper part of the sliding plate is provided with an outward L-shaped fold. The horizontal part of the L-shaped fold is on top and the vertical part is on the bottom. The end of the horizontal part of the L-shaped fold is connected to the upper edge of the sliding plate. The L-shaped fold and the sliding plate form a square sliding groove with the opening facing downward. The square sliding groove slides on the horizontal sliding guide rod. The horizontal sliding guide rod is parallel to the guide plate sliding rod. The bracket is provided with a fixing structure for locking the position of the sliding plate.

[0013] Furthermore, an extension plate is provided on the upper part of the sliding plate away from the sprocket, and an auxiliary tensioning roller is rotatably connected between the extension plates of the two sliding plates. Several ring plates are arranged axially at intervals outside the auxiliary tensioning roller. The lower edge of the ring plate abuts against the upper surface of the upper side of the transmission belt body, and the height of the lowermost edge of the ring plate is less than the height of the uppermost edge of the rotating cylinder.

[0014] Compared with the prior art, the present invention has the following advantages: it is reasonably designed. The guide scraper mechanism removes the debris conveyed from the upper surface of the lower part of the conveyor belt and then guides it to the collection area at the bottom through the guide collection mechanism. This completes the removal of debris from the conveyor belt, avoids contact between the debris and the driven roller, and facilitates professional poultry farming. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of an embodiment of the present utility model;

[0016] Figure 2 for Figure 1 Schematic diagram of the AA section structure;

[0017] Figure 3 for Figure 1 Schematic diagram of the structure in the B-direction view;

[0018] Figure 4 This is a schematic diagram of the ratchet mechanism structure of an embodiment of the present invention;

[0019] Figure 5 This is a cross-sectional view of the sprocket mounting shaft, sprocket, and ratchet connection in an embodiment of this utility model.

[0020] Figure 6 This is a schematic diagram of the auxiliary tensioning roller structure in an embodiment of the present invention.

[0021] In the diagram: 1-Support; 2-Transmission belt structure; 4-Sliding rotating roller; 5-Transmission belt; 6-Fixed structure; 7-Roller core; 8-Rotating cylinder; 9-Sliding plate; 10-Branch tensioning mechanism; 11-Sprocket; 12-Chain; 13-Bending plate; 14-Connecting angle steel; 15-Ratchet; 16-Ratchet wrench; 17-Slot; 18-L-shaped fold; 19-Square sliding groove; 20-Support rod; 21-Sprocket mounting shaft; 22-Polygonal hole; 23-Extension plate; 24-Auxiliary tensioning roller; 25-Ring plate; 26-Guide scraper mechanism; 27-Guiding and collecting mechanism; 28-Triangular frame; 29-Folding fixing plate; 30-U-shaped connecting plate; 31-Inclined guide plate; 32-Guide plate sliding rod; 33-L-shaped sliding joint plate; 34-Trapezoidal sliding groove; 35-Collection tray; 36-Horizontal sliding guide rod. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0024] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0025] like Figure 1-6 As shown, a duck cage excrement cleaning device includes a support 1. A transmission belt structure 2 is arranged along the length of the duck cage on the support. The transmission belt structure is located below the duck cage. The transmission belt structure includes a fixed rotating roller (not shown) and a sliding rotating roller 4 arranged in parallel. The fixed rotating roller and the sliding rotating roller are together sleeved in a transmission belt 5. Specifically: the sliding rotating roller is a driven roller that drives the lower part of the transmission belt to reverse direction upwards, the fixed rotating roller is an active roller driven by a motor, that is, the fixed rotating roller is the active roller that actively drives the transmission belt to move, and the sliding rotating roller is a driven roller used to tension the transmission belt. The fixed rotating roller is rotatably connected to the support, and the sliding rotating roller is horizontally slidably connected to the support. A guide scraping mechanism 26 is arranged on the upper surface of the lower part of the transmission belt. A guide collection mechanism 27 is arranged on the support below the guide scraping mechanism. Through the guide scraping mechanism, the debris conveyed from the upper surface of the lower part of the transmission belt is discharged from the transmission belt, and then guided to the collection area below by the guide collection mechanism for collection, thus completing the removal of debris in the transmission belt.

[0026] In this embodiment, the specific sliding conveyor roller structure is as follows: the sliding rotating roller includes a roller core 7, the roller core is parallel to the fixed rotating roller, a rotating cylinder 8 is rotatably connected to the outside of the roller core, the transmission belt is sleeved on the outside of the rotating cylinder, and the roller core is slidably connected to the bracket, that is, the roller core is installed on the bracket, and the rotating cylinder on the roller core realizes the movement of the auxiliary transmission belt.

[0027] In this embodiment, the specific structure of the sliding rotary roller is as follows: vertical sliding plates 9 are installed at both ends of the roller core. The sliding plates are horizontally slidably connected to the bracket. The bracket is provided with a fixing structure for locking the position of the sliding plates. The lower edge of the sliding plate near the fixed rotary roller is connected to the guide scraping mechanism. The sliding rotary roller is a driven roller that assists in driving the lower belt body of the transmission belt to change direction upward. Therefore, the lower transmission belt body moves towards the sliding rotary roller. Therefore, the guide scraping mechanism is close to the sliding rotary roller. More specifically, the guide scraping mechanism includes a horizontally arranged triangular frame 28. The triangular frame is attached to the upper surface of the lower belt body of the transmission belt. The apex of the triangular frame faces the fixed rotary roller. The two bottom corners of the triangular frame are respectively connected to the sliding plates on the corresponding sides. That is, the debris conveyed along the upper surface of the lower transmission belt will be divided into two areas at the apex of the triangular frame. The debris in the two areas will be guided out of the transmission belt along the frame edge of the triangular frame to avoid the debris from contacting the sliding conveyor roller.

[0028] In this embodiment, the specific connection method between the triangular frame and the sliding plate is as follows: an outwardly folding fixing plate 29 is provided on the lower edge of the sliding plate near the fixed rotating roller, that is, the folding fixing plate is located under the extension plate, and the bottom corner of the triangular frame extends out of the transmission belt corresponding to the folding fixing plate, so that the debris conveyed along the upper surface of the lower transmission belt can be output along the frame edge. The folding fixing plate and the corresponding bottom corner of the triangular frame are connected by a U-shaped connecting plate 30 and bolts to achieve fixation.

[0029] In this embodiment, the guiding and collecting mechanism includes inclined guide plates 31 symmetrically arranged on both sides below the transmission belt. A horizontal guide plate sliding rod 32 is provided on the bracket corresponding to the inclined guide plate. An L-shaped sliding plate 33 is provided on the inclined upper edge of the inclined guide plate. The horizontal part of the L-shaped sliding plate is on top and the vertical part is on the bottom. The end of the horizontal part of the L-shaped sliding plate is connected to the inclined upper end of the inclined guide plate. The L-shaped sliding plate and the inclined guide plate form a trapezoidal sliding groove 34 with the groove opening facing downward. The guide plate sliding rod is a trapezoidal cross-section rod provided corresponding to the trapezoidal sliding groove. The trapezoidal sliding groove slides on the guide plate sliding rod to realize the sliding adjustment of the position of the inclined guide plate as needed. The position of the inclined guide plate is set corresponding to the triangular frame to facilitate the guiding of falling debris.

[0030] In this embodiment, in order to collect debris, the lower end of the inclined guide plate is inclined toward the middle of the bracket, the inclined guide plate is located below the bottom corner of the corresponding triangular frame, and a collection tray 35 is provided below the two inclined guide plates to achieve collection.

[0031] Because existing duck cage waste conveyor belts tend to loosen after prolonged use, the conveyor rollers become ineffective in driving the belt, resulting in inefficient waste output. Typically, a tension roller is added to the conveyor belt to further tighten it. However, adding a tension roller requires cleaning the duck cage and removing the ducks, which is time-consuming, labor-intensive, and can disturb the ducks. Therefore, in this embodiment, the sliding conveyor roller is slidably attached to the support frame, allowing for easy adjustment of its position to achieve belt tension. Simultaneously, the sliding plate is fixed in position via the fixing structure 6 on the support frame, ensuring effective belt tensioning.

[0032] The specific fixing structure can be existing bolts, which directly lock the position of the sliding plate. Alternatively, it can be a branch tensioning mechanism 10 corresponding to the sliding plate, where two branch tensioning mechanisms pull the two sliding plates respectively, thereby widening the gap between the fixed rotating roller and the sliding rotating roller to achieve tensioning of the transmission belt. Other fixing methods are also possible. This embodiment uses a branch tensioning mechanism, the specific structure of which is as follows: the branch tensioning mechanism includes a sprocket 11 rotatably connected to the bracket, and a chain 12 that cooperates with the sprocket is connected to the side of the sliding plate near the sprocket. One end of the chain is rotatably connected to the edge of the sliding plate, and the chain link at the other end of the chain is engaged with the chain teeth of the sprocket. In use, by rotating the sprocket, the chain is gradually pulled, ultimately pulling the sliding plate.

[0033] In this embodiment, in order to connect the sliding plate to the end of the chain, an outwardly bent plate 13 is provided on the side of the sliding plate near the sprocket. A connecting angle steel 14 is installed on the plate surface corresponding to the end of the chain on the bent plate. One side of the connecting angle steel is fixed to the bent plate, and the other side is connected to the end link of the chain through a rotating shaft, thereby connecting the sliding plate to the end of the chain.

[0034] In this embodiment, to ensure the sprocket can be fixed in the required rotational position and to prevent the sprocket from failing to maintain its rotational position due to the tension of the transmission belt after the sliding plate is pulled and tensioned, the branch tensioning mechanism also includes a ratchet mechanism for fixing the rotational position of the sprocket. The ratchet mechanism includes a ratchet 15, which is coaxially mounted with the sprocket and rotates synchronously. A ratchet wrench 16 is rotatably connected above the ratchet on the bracket. The ratchet wrench has a slot 17 corresponding to the ratchet teeth. In use, when it is necessary to fix the rotational position of the sprocket, the ratchet wrench uses the slot to lock the ratchet teeth, thus fixing the rotational position of the sprocket. When it is necessary to rotate the sprocket to tension the transmission belt, the ratchet wrench is rotated to disengage the slot from the ratchet teeth, thus unlocking the sprocket. A spacer can be provided between the sprocket and the ratchet to prevent interference between the ratchet wrench and the chain.

[0035] In this embodiment, in order to realize the sliding of the sliding plate, a horizontal sliding guide rod 36 is provided on the bracket corresponding to the sliding direction of the sliding plate. That is, two horizontal sliding guide rods are located on both sides of the transmission belt. The horizontal sliding guide rod is a square rod. The upper part of the sliding plate is provided with an outward L-shaped fold 18. The horizontal part of the L-shaped fold is on top and the vertical part is on the bottom. The end of the horizontal part of the L-shaped fold is connected to the upper edge of the sliding plate. The L-shaped fold and the sliding plate form a square sliding groove 19 with the opening facing downward. The square sliding groove slides on the horizontal sliding guide rod. The horizontal sliding guide rod is parallel to the guide plate sliding rod and is located above the guide plate sliding rod.

[0036] In this embodiment, vertical support rods 20 are installed at both ends of the horizontal sliding guide rod on the bracket. The guide plate sliding rod is also located between the two corresponding support rods, that is, the end of the guide plate sliding rod is fixed to the corresponding support rod. A sprocket mounting shaft 21 is rotatably connected to one of the support rods. The sprocket and ratchet are fixedly installed on the sprocket mounting shaft, so that the sprocket, ratchet and sprocket mounting shaft move synchronously. A polygonal hole 22 is opened at the end of the mounting shaft, which can be a hexagonal hole. In use, the rotation of the sprocket mounting shaft is driven by a hexagonal wrench, which in turn drives the sprocket and ratchet to rotate synchronously.

[0037] In this embodiment, since the sliding conveyor roller is a driven roller, in order to increase the contact area between the transmission belt and the sliding conveyor roller, an extension plate 23 is provided on the upper part of the sliding plate away from the sprocket. An auxiliary tensioning roller 24 is rotatably connected between the extension plates of the two sliding plates. Several ring plates 25 are arranged axially at intervals outside the auxiliary tensioning roller. The lower edge of the ring plate abuts against the upper surface of the upper side of the transmission belt. The height of the lowermost edge of the ring plate is less than the height of the uppermost edge of the rotating cylinder. In use, by pressing down on the upper side of the transmission belt through the ring plate, the tension of the transmission belt is increased on the one hand, and the contact area between the transmission belt and the sliding conveyor roller is increased on the other hand, which facilitates the driven rotation of the sliding conveyor roller.

[0038] Unless otherwise stated, if any of the technical solutions disclosed in this utility model discloses a numerical range, then the disclosed numerical range is a preferred numerical range. Any person skilled in the art should understand that the preferred numerical range is merely one among many feasible numerical values ​​that has a more obvious or representative technical effect. Because there are many numerical values, it is impossible to list them all. Therefore, this utility model discloses only some numerical values ​​to illustrate the technical solutions of this utility model. Furthermore, the numerical values ​​listed above should not constitute a limitation on the scope of protection of this utility model.

[0039] If the terms "first" or "second" are used in this document to specify components, those skilled in the art should know that the use of "first" or "second" is merely for the purpose of distinguishing components in description, and unless otherwise stated, the above terms have no special meaning.

[0040] If this utility model discloses or relates to mutually fixedly connected parts or structural components, then unless otherwise stated, a fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws), or a non-detachable fixed connection (e.g., riveting, welding). Of course, mutually fixed connections can also be replaced by an integral structure (e.g., manufactured by integral molding using a casting process) (except where it is obviously impossible to use an integral molding process).

[0041] Furthermore, the orientations or positional relationships indicated by terms such as "longitudinal," "lateral," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used in any of the technical solutions disclosed in this utility model are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing this patent. They are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this patent. In addition, unless otherwise stated, the terms used to indicate shape in any of the technical solutions disclosed in this utility model include shapes that are similar to, close to, or approximate with it.

[0042] Any component provided by this utility model can be assembled from multiple individual components, or it can be a single component manufactured by a one-piece molding process.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A duck cage excrement cleaning device, comprising a support, a transmission belt structure is arranged on the support along the length of the duck cage, the transmission belt structure is located below the duck cage, the transmission belt structure comprises fixed rotating rollers and sliding rotating rollers arranged in parallel, the fixed rotating rollers and the sliding rotating rollers are jointly sleeved in a transmission belt, the fixed rotating rollers are rotationally connected to the support, and the sliding rotating rollers are horizontally slidably connected to the support, characterized in that: The upper surface of the lower belt body of the transmission belt structure is provided with a guide scraping belt mechanism, and the bracket is provided with a guide and collection mechanism below the guide scraping belt mechanism; ​ The sliding rotating roller comprises a roller core, and vertical sliding plates are mounted at both ends of the roller core; The guide scraping belt mechanism comprises a horizontally arranged triangular frame, the triangular frame is attached to the upper surface of the lower belt body of the transmission belt, the top corner end of the triangular frame faces the side of the fixed rotating roller, and the two bottom corner ends of the triangular frame are connected with the corresponding sliding plates; The guide and collection mechanism comprises two inclined guide plates which are symmetrically arranged below both sides of the transmission belt, the bracket is provided with horizontal guide plate sliding rods corresponding to the inclined guide plates, the inclined upper end edges of the inclined guide plates are provided with L-shaped sliding plates, the horizontal part of the L-shaped sliding plate is on the top, the vertical part is on the bottom, the end of the horizontal part of the L-shaped sliding plate is connected with the inclined upper end of the inclined guide plate, the L-shaped sliding plate and the inclined guide plate form a downward trapezoidal sliding groove, the guide plate sliding rod is a trapezoidal cross-section rod arranged corresponding to the trapezoidal sliding groove, and the trapezoidal sliding groove is slidably connected to the guide plate sliding rod.

2. Duck cage manure cleaning device according to claim 1, characterized in that: The sliding rotating roller is a driven roller for changing the direction of the lower belt body of the transmission belt upward, and the fixed rotating roller is a driving roller driven by a motor.

3. A duck cage manure cleaning device according to claim 2, characterised in that: The roller core is parallel to the fixed rotating roller, a rotating cylinder is connected to the outside of the roller core, the transmission belt is sleeved outside the rotating cylinder, and the roller core is slidably connected to the bracket.

4. A duck cage manure cleaning device according to claim 3, characterized in that: The sliding plate is horizontally slidably connected to the bracket, and the lower edge of the side of the sliding plate close to the fixed rotating roller is connected with the guide scraping belt mechanism.

5. A duck cage manure cleaning device according to claim 4, characterised in that: The lower edge of the side of the sliding plate close to the fixed rotating roller is provided with an outwardly folded fixing plate, the bottom corner end of the triangular frame extends out of the transmission belt, and the folded fixing plate is connected with the corresponding bottom corner end of the triangular frame through a U-shaped connecting plate.

6. A duck cage manure cleaning device according to claim 5, characterised in that: The lower end of the inclined guide plate is inclined toward the middle part of the bracket, the inclined guide plate is below the corresponding bottom corner end of the triangular frame, and a collecting disc is arranged below the two inclined guide plates.

7. The duck cage manure cleaning apparatus of claim 4, wherein: The bracket is provided with a horizontal sliding guide rod corresponding to the sliding plate, the horizontal sliding guide rod is a square rod, the upper part of the sliding plate is provided with an outward L-shaped fold, the horizontal part of the L-shaped fold is on the top, the vertical part is on the bottom, the end of the horizontal part of the L-shaped fold is connected with the upper edge of the sliding plate, the L-shaped fold and the sliding plate form a downward square sliding groove, the square sliding groove is slidably connected to the horizontal sliding guide rod, the horizontal sliding guide rod is parallel to the guide plate sliding rod, and the bracket is provided with a fixing structure for locking the position of the sliding plate.

8. The duck cage manure cleaning apparatus of claim 4, wherein: The upper part of the side of the sliding plate away from the sprocket is provided with an extension plate, an auxiliary tensioning roller is rotatably connected between the extension plates of the two sliding plates, a plurality of ring pieces are arranged on the outer periphery of the auxiliary tensioning roller along the axial direction, the lower edge of the ring piece abuts against the upper surface of the upper belt body of the transmission belt, and the height of the lowermost edge of the ring piece is less than the height of the uppermost edge of the rotating cylinder.

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