Production equipment of silicon steel ballast for electrical equipment

Abstract

The utility model discloses silicon steel ballast production equipment for electrical equipment, and relates to the technical field of silicon steel ballast production equipment. Comprising a mounting base, the mounting base is provided with a machining mechanism for producing a silicon steel ballast for electrical equipment, connecting roll shafts evenly distributed on the lower end face of a mounting plate descend through a second electric push rod and are attached to the upper surface of a silicon steel sheet, stable pressing of the silicon steel sheet is achieved, and manual intervention for adjusting the position of the silicon steel sheet is not needed; the production requirements of silicon steel sheets with different thicknesses are met, the universality and applicability of equipment are enhanced, one side of the silicon steel sheet conveyed to the supporting base is prevented from being tilted when the silicon steel sheet is cut, the stability of the silicon steel sheet is ensured, the silicon steel sheet can be firmly pressed on the conveying belt, and the silicon steel sheet is kept flat and stable in the cutting process; the cutter can accurately cut according to the preset path and size, the cutting precision of the silicon steel sheet is improved, and the production quality of ballasts is further guaranteed.

Description

Technical Field

[0001] This utility model relates to the technical field of silicon steel ballast production equipment, specifically to a silicon steel ballast production equipment for electrical equipment. Background Technology

[0002] In the field of electrical equipment, silicon steel ballasts are widely used in lighting, motor drives, and many other applications due to their excellent electromagnetic properties. With the booming development of the electrical equipment industry, the demand for silicon steel ballasts is increasing, which places higher demands on their production equipment.

[0003] Silicon steel ballasts are widely used in electrical equipment, and their production process involves multiple steps such as silicon steel sheet cutting, stacking, assembly, and welding.

[0004] Silicon steel ballasts are manufactured in electrical equipment where silicon steel sheets are conveyed and cut. However, when conveyed to the cutting area, the silicon steel sheets are prone to warping due to a lack of reliable stabilization measures. This warping not only leads to instability in the position of the silicon steel sheets during the cutting process, making it difficult for the cutter to cut accurately according to the preset path and size, but also causes the silicon steel sheets to shift during subsequent processing, making it impossible to guarantee their stable position on the support. Furthermore, this generates a large amount of debris and dust, and there is a lack of effective collection methods. Moreover, the collected waste is usually not compressed, occupying a lot of space. Therefore, this utility model provides a silicon steel ballast production equipment for electrical equipment. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a production equipment for silicon steel ballasts used in electrical equipment. It solves the problem that when silicon steel sheets are transported to the cutting area, the lack of reliable stabilization measures causes them to warp. This warping not only leads to instability in the position of the silicon steel sheets during the cutting process, making it difficult for the cutting tool to accurately cut according to the preset path and dimensions, but also causes displacement of the silicon steel sheets during subsequent processing, making it impossible to guarantee their stable position on the support. Furthermore, it generates a large amount of debris and dust, lacks effective collection methods, and the collected waste is usually not compressed, occupying a significant amount of space.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a silicon steel ballast production equipment for electrical equipment, comprising a mounting base, wherein a processing mechanism for producing silicon steel ballasts for electrical equipment is mounted on the mounting base, the processing mechanism comprising:

[0007] The conveying assembly includes a conveyor belt on the upper surface of a mounting base, a U-shaped bracket fixed to the side wall of the mounting base, and a connecting roller shaft connected to the top of the U-shaped bracket via a lifting assembly.

[0008] The cutting assembly includes a support base fixed at one end of the mounting base, a mounting bracket fixed to the side wall of the support base, a slide rail bracket connected by a movable component inside the mounting bracket, a cutting blade connected by a reciprocating component inside the slide rail bracket, a dust collection shell fixed to both sides of the cutting cavity of the support base, and a pair of sliding grooves opened inside the support base, with a limit sliding plate slidably connected to the inner wall of the sliding grooves.

[0009] Preferably, the lifting assembly includes a second electric push rod fixed through the top of a U-shaped bracket, with a mounting plate fixed to the telescopic end of the second electric push rod, and the connecting rollers are evenly distributed on the lower end face of the mounting plate.

[0010] Preferably, the movable component includes a third electric push rod that is fixed through the top of the mounting bracket, and a connecting bracket is fixed to the telescopic end of the third electric push rod. The slide rail bracket is located at the lower end of the connecting bracket and is fixedly connected.

[0011] Preferably, the reciprocating assembly includes a reciprocating screw that is rotatably connected to a slide rail bracket in the horizontal direction, a slider that is slidably connected to the inner wall of the slide rail bracket, the slider and the reciprocating screw being threadedly connected, the cutting piece being located on the side wall of the slider, and a protective plate being fixed to the outer wall of the slider.

[0012] Preferably, a collection shell is fixed to the outer wall of the mounting base near the support base, a fourth electric push rod is fixed vertically to the collection shell, the telescopic end of the fourth electric push rod extends into the collection shell and a pressure plate is fixed to one end, the pressure plate is slidably connected to the collection shell, and the dust collection shell and the collection shell are connected by a conduit.

[0013] Preferably, a first electric push rod is fixed to the lower end of the support base, a push block is fixed to the telescopic end of the first electric push rod, and movable rods are provided on both sides of the push block via a rotating shaft. The end of the movable rod is rotatably connected to the lower end of the limiting slide plate via a rotating shaft.

[0014] Beneficial effects

[0015] This utility model provides a production equipment for silicon steel ballasts used in electrical equipment. Compared with the prior art, it has the following advantages:

[0016] Firstly, the conduit of this utility model connects the dust collection shell and the collection shell to form a waste transfer channel. Under the suction force generated by the dust collection device, the waste smoothly enters the collection shell from the dust collection shell. When a certain amount of waste accumulates in the collection shell, the fourth electric push rod is activated. The fourth electric push rod is fixed in the vertical direction of the collection shell, and its telescopic end extends into the collection shell and is fixed with a pressure plate. As the fourth electric push rod extends and retracts, the pressure plate slides up and down in the collection shell, compressing the waste in the collection shell. Through compression, the space occupied by the waste is reduced, and the storage capacity of the collection shell is increased. The dust collection shell absorbs the waste generated by cutting in a timely manner, effectively preventing silicon steel sheet fragments and dust from flying in the production workshop, reducing the dust content in the air, improving the working environment, reducing the risk of workers inhaling dust, and protecting the health of workers. In addition, the fourth electric push rod and pressure plate in the collection shell compress the waste, greatly reducing the volume of the waste, thereby saving storage space, reducing the frequency of waste transfer, improving the space utilization rate of production equipment, and reducing the cost of waste storage and transportation.

[0017] Secondly, the connecting rollers evenly distributed on the lower end face of the mounting plate of this utility model are lowered by the second electric push rod and put into contact with the upper surface of the silicon steel sheet, realizing stable pressing of the silicon steel sheet without manual intervention to adjust the position of the silicon steel sheet, reducing manual operation links, and adapting to the production needs of silicon steel sheets of different thicknesses, enhancing the versatility and applicability of the equipment. It also prevents the silicon steel sheet from tilting on one side when it is conveyed to the support seat for cutting, ensuring the stability of the silicon steel sheet. It can firmly press the silicon steel sheet onto the conveyor belt, keeping it flat and stable during the cutting process, ensuring that the cutter can accurately cut according to the preset path and size, improving the cutting accuracy of the silicon steel sheet, and thus ensuring the production quality of the ballast.

[0018] Thirdly, the movable rod of this utility model pushes the limiting slide plate downwards in the slide groove. As the limiting slide plate slides down, its limiting force on the silicon steel sheet increases, further fixing the silicon steel sheet in a suitable position on the support base, ensuring that the silicon steel sheet will not shift during subsequent processing. The first electric push rod drives the push block, which in turn drives the limiting slide plate to slide in the slide groove via the movable rod. The position of the limiting slide plate can be precisely adjusted according to the size of the silicon steel sheet and processing requirements, achieving precise limiting of the silicon steel sheet and ensuring the stability of the silicon steel sheet during processing. This improves processing accuracy and product quality. It can adapt to silicon steel sheets of different specifications and sizes. The position of the limiting slide plate can be changed by adjusting the first electric push rod to effectively limit the silicon steel sheet, enhancing the adaptability of the equipment to different types of silicon steel sheets and expanding the application range of the equipment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the slide rail bracket connection structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the connecting roller shaft connection structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the internal structure of the collection shell of this utility model.

[0023] In the diagram: 1. Mounting base; 2. Support base; 201. Slide groove; 202. Limiting slide plate; 203. First electric push rod; 204. Push block; 3. Movable rod; 4. Conveyor belt; 401. U-shaped bracket; 402. Second electric push rod; 403. Mounting plate; 404. Connecting roller; 5. Mounting bracket; 501. Third electric push rod; 502. Connecting bracket; 503. Slide rail bracket; 504. Reciprocating screw; 505. Slider; 506. Cutting piece; 507. Protective plate; 6. Dust collection shell; 601. Collection shell; 602. Fourth electric push rod; 603. Pressure plate. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-4 This utility model provides a technical solution: a silicon steel ballast production equipment for electrical equipment, including a mounting base 1, on which a processing mechanism for producing silicon steel ballasts for electrical equipment is provided, the processing mechanism including:

[0026] The conveying assembly includes a conveyor belt 4 provided on the upper surface of the mounting base 1, a U-shaped bracket 401 fixed on the side wall of the mounting base 1, and a connecting roller 404 connected by a lifting assembly fixed at the top of the U-shaped bracket 401.

[0027] The cutting assembly includes a support base 2 fixed at one end of the mounting base 1, a mounting bracket 5 fixed on the side wall of the support base 2, a slide rail bracket 503 connected by a movable component inside the mounting bracket 5, a cutting slice 506 connected by a reciprocating component inside the slide rail bracket 503, a dust collection shell 6 fixed on both sides of the cutting cavity of the support base 2, and a pair of slide grooves 201 opened inside the support base 2, with a limit slide plate 202 slidably connected to the inner wall of the slide grooves 201.

[0028] In a preferred embodiment, the lifting assembly includes a second electric push rod 402 fixed through the top of a U-shaped bracket 401. A mounting plate 403 is fixed to the telescopic end of the second electric push rod 402. Connecting rollers 404 are evenly distributed on the lower end face of the mounting plate 403. A conveyor belt 4 is driven by a motor, placing silicon steel sheets produced by the silicon steel ballast onto the conveyor belt 4 and conveying them to the support seat 2 for cutting. During conveying, the connecting rollers 404, evenly distributed on the lower end face of the mounting plate 403, descend via the second electric push rod 402, connecting with the silicon steel sheet. The upper surface of the steel sheet is adhered to achieve stable pressing of the silicon steel sheet, eliminating the need for manual intervention to adjust the position of the silicon steel sheet, reducing manual operation steps, and adapting to the production needs of silicon steel sheets of different thicknesses. This enhances the versatility and applicability of the equipment, prevents one side of the silicon steel sheet from tilting up when it is cut on the support seat 2, and ensures the stability of the silicon steel sheet. It can firmly press the silicon steel sheet onto the conveyor belt 4, keeping it flat and stable during the cutting process, ensuring that the cutter can accurately cut according to the preset path and size, improving the cutting accuracy of the silicon steel sheet, and thus ensuring the production quality of the ballast.

[0029] In a preferred embodiment, the movable component includes a third electric push rod 501 fixed through the top of the mounting bracket 5. A connecting bracket 502 is fixed to the telescopic end of the third electric push rod 501. A slide rail bracket 503 is fixedly connected to the lower end of the connecting bracket 502. The reciprocating component includes a reciprocating screw 504 rotatably connected to the slide rail bracket 503 in the horizontal direction. A slider 505 is slidably connected to the inner wall of the slide rail bracket 503. The slider 505 is threadedly connected to the reciprocating screw 504. A cutting piece 506 is located on the side wall of the slider 505. A protective plate 507 with an arc-shaped structure is fixed to the outer wall of the slider 505. When it is necessary to cut the silicon... When the steel sheet is being cut, the third electric push rod 501 is activated. Since the top of the third electric push rod 501 is fixed to the mounting bracket 5, and its telescopic end is fixed to the connecting bracket 502, the third electric push rod 501 drives the connecting bracket 502 to rise and fall vertically through telescopic movement. This adjusts the height of the slide rail bracket 503 and the cutting piece 506 fixedly connected to the lower end of the connecting bracket 502, bringing them to the appropriate cutting position. The reciprocating screw 504 rotates horizontally on the slide rail bracket 503. Because the slider 505 is threadedly connected to the reciprocating screw 504, and the slider 505 is also located on the inner wall of the slide rail bracket 503... The sliding connection allows the slider 505 to reciprocate linearly along the inner wall of the slide rail bracket 503 in a horizontal direction when the reciprocating screw 504 rotates. The cutting blade 506 on the side wall of the slider 505 cuts the silicon steel sheet placed in the corresponding position as the slider 505 reciprocates. The cutting blade 506 is driven by a micro motor on the slider 505, as is the reciprocating screw 504. The arc-shaped protective plate 507 fixed to the outer wall of the slider 505 provides some protection for the operator, preventing accidental injury from the cutting blade 506, and also avoids... The third electric push rod 501 eliminates the flying debris generated during the cutting process, allowing the height of the connecting bracket 502, slide rail bracket 503, and cutting slice 506 to be flexibly adjusted according to silicon steel sheets of different thicknesses or different cutting process requirements. This enhances the equipment's adaptability to processing silicon steel sheets of various specifications and improves its versatility. The threaded transmission of the reciprocating screw 504 and the slider 505, combined with the guiding effect of the slide rail bracket 503, enables the slider 505 to achieve stable and precise reciprocating linear motion, thereby ensuring that the cutting slice 506 cuts the silicon steel sheet according to the predetermined trajectory, improving the cutting accuracy and quality.

[0030] In a preferred embodiment, a collection housing 601 is fixed to the outer wall of the mounting base 1 near the support base 2. A fourth electric push rod 602 is fixed vertically to the collection housing 601. The telescopic end of the fourth electric push rod 602 extends into the collection housing 601, and a pressure plate 603 is fixed to one end. The pressure plate 603 is slidably connected to the collection housing 601. The dust collection housing 6 is connected to the collection housing 601 through a conduit. When the silicon steel sheet is cut in the cutting cavity of the support base 2, the dust collection housing 6 starts to work. The dust collection housing 6 utilizes its internal... The vacuuming device generates suction to draw in waste materials such as silicon steel sheet scraps and dust generated during the cutting process. Since the vacuuming housing 6 is fixed to both sides of the cutting cavity, it can collect waste at its source, preventing it from flying around. The waste collected by the vacuuming housing 6 is transported to the collection housing 601 through a conduit. The conduit connects the vacuuming housing 6 and the collection housing 601, forming a waste transport channel. Under the suction force generated by the vacuuming device, the waste smoothly enters the collection housing 601 from the vacuuming housing 6. When waste accumulates in the collection housing 601... After a certain amount of waste is collected, the fourth electric push rod 602 is activated. The fourth electric push rod 602 is fixed vertically in the collecting housing 601, and its telescopic end extends into the collecting housing 601 and is fixed with a pressure plate 603. As the fourth electric push rod 602 extends and retracts, the pressure plate 603 slides up and down inside the collecting housing 601, compressing the waste inside. This compression reduces the space occupied by the waste, increasing the storage capacity of the collecting housing 601. The dust-collecting housing 6 promptly absorbs the waste generated during cutting, effectively preventing silicon... Steel scraps and dust fly around in the production workshop, reducing the dust content in the air, improving the working environment, reducing the risk of workers inhaling dust, and protecting the health of workers. The fourth electric push rod 602 and pressure plate 603 inside the collection shell 601 compress the waste, greatly reducing the volume of the waste, thereby saving storage space, reducing the frequency of waste transfer, improving the space utilization rate of production equipment, and reducing waste storage and transportation costs. A dust suction pump for adsorption is set on one side of the collection shell 601.

[0031] In a preferred embodiment, a first electric push rod 203 is fixed to the lower end of the support base 2. A push block 204 is fixed to the telescopic end of the first electric push rod 203. Movable rods 3 are rotatably connected to both sides of the push block 204 via rotating shafts. The ends of the movable rods 3 are rotatably connected to the lower end of the limiting slide plate 202 via rotating shafts. When further limiting or adjusting the position of the silicon steel sheet is required, the first electric push rod 203 extends or retracts. The extension or retraction of the first electric push rod 203 drives the push block 204 to move downward. The movable rods 3, rotatably connected to both sides of the push block 204 via rotating shafts, move accordingly. The ends of the movable rods 3 are rotatably connected to the lower end of the limiting slide plate 202 via rotating shafts. Driven by the push block 204, the movable rods 3 push the limiting slide plate 202 to slide downward in the slide groove 201. As the limiting slide plate 202 slides down, its limiting force on the silicon steel sheet increases, further limiting or adjusting the position of the silicon steel sheet. The step is fixed in a suitable position on the support base 2 to ensure that the silicon steel sheet will not be displaced during subsequent processing. The push block 204 is driven by the first electric push rod 203, which drives the limiting slide plate 202 to slide in the slide groove 201 via the movable rod 3. The position of the limiting slide plate 202 can be precisely adjusted according to the size of the silicon steel sheet and processing requirements to achieve precise limiting of the silicon steel sheet, ensuring the stability of the silicon steel sheet during processing, thereby improving processing accuracy and product quality. It can adapt to silicon steel sheets of different specifications and sizes. The position of the limiting slide plate 202 can be changed by adjusting the first electric push rod 203 to effectively limit the silicon steel sheet, enhancing the adaptability of the equipment to different types of silicon steel sheets and expanding the application range of the equipment. The micro motor model N30-050 and the micro pump model ZR5551PM are existing technologies and will not be described in detail.

[0032] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0033] During operation, the silicon steel sheets produced by the silicon steel ballast are placed on the conveyor belt 4 and transported to the support seat 2 for cutting. During transport, the connecting rollers 404, evenly distributed on the lower end face of the mounting plate 403, are lowered via the second electric push rod 402 to contact the upper surface of the silicon steel sheets, preventing one side of the silicon steel sheets from lifting during cutting on the support seat 2. Then, the first electric push rod 203 extends and retracts, causing the push block 204 to move downwards. The movable rods 3, rotatably connected to both sides of the push block 204 via rotating shafts, move accordingly. The ends of the movable rods 3 are rotatably connected to the lower end of the limiting slide plate 202 via rotating shafts. Driven by the push block 204, the movable rods 3 push the limiting slide plate 202 downwards within the groove 201. As the limiting slide plate 202 slides down, its limiting force on the silicon steel sheets increases, further fixing the silicon steel sheets in a suitable position on the support seat 2, ensuring that the silicon steel sheets do not... Displacement will occur, and then cutting will be performed. The third electric push rod 501 is activated. Since the top of the third electric push rod 501 is fixed through the mounting bracket 5, and its telescopic end is fixed with the connecting bracket 502, the third electric push rod 501 drives the connecting bracket 502 to rise and fall in the vertical direction through telescopic movement, thereby adjusting the height of the slide rail bracket 503 and the cutting piece 506 fixedly connected to the lower end of the connecting bracket 502, so that they reach the appropriate cutting position. The reciprocating screw 504 rotates in the horizontal direction of the slide rail bracket 503. Since the slider 505 is threadedly connected to the reciprocating screw 504, and the slider 505 is also slidably connected to the inner wall of the slide rail bracket 503, when the reciprocating screw 504 rotates, the slider 505 will reciprocate linearly along the inner wall of the slide rail bracket 503 in the horizontal direction. The cutting piece 506 on the side wall of the slider 505 performs the cutting work on the silicon steel sheet placed in the corresponding position with the reciprocating movement of the slider 505.

[0034] When the silicon steel sheet is being cut in the cutting cavity of the support 2, the dust collection housing 6 starts to work. The dust collection housing 6 uses the internal dust collection device to generate suction to suck up the silicon steel sheet debris, dust and other waste generated during the cutting process. Since the dust collection housing 6 is fixed on both sides of the cutting cavity, it can collect the waste at the source in a timely manner to prevent the waste from flying around. The waste collected by the dust collection housing 6 is transported to the collection housing 601 through the conduit. The conduit connects the dust collection housing 6 and the collection housing 601 to form a waste transmission channel. Under the suction generated by the dust collection device, the waste smoothly enters the collection housing 601 from the dust collection housing 6.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A manufacturing equipment for silicon steel ballasts used in electrical equipment, comprising a mounting base (1), characterized in that: The mounting base (1) is provided with a processing mechanism for manufacturing silicon steel ballasts for electrical equipment. The processing mechanism includes: The conveying assembly includes a conveyor belt (4) provided on the upper surface of the mounting base (1), a U-shaped bracket (401) fixed on the side wall of the mounting base (1), and a connecting roller shaft (404) connected by a lifting assembly fixed at the top of the U-shaped bracket (401). The cutting assembly includes a support base (2) fixed at one end of a mounting base (1), a mounting bracket (5) fixed on the side wall of the support base (2), a slide rail bracket (503) connected by a movable component inside the mounting bracket (5), a cutting slice (506) connected by a reciprocating component inside the slide rail bracket (503), a dust collection shell (6) fixed on both sides of the cutting cavity of the support base (2), and a pair of sliding grooves (201) opened inside the support base (2), with a limit slide plate (202) slidably connected to the inner wall of the sliding grooves (201).

2. The equipment for producing silicon steel ballasts for electrical equipment according to claim 1, characterized in that: The lifting assembly includes a second electric push rod (402) fixed through the top of a U-shaped bracket (401), and a mounting plate (403) is fixed to the telescopic end of the second electric push rod (402). The connecting rollers (404) are evenly distributed on the lower end face of the mounting plate (403).

3. The equipment for producing silicon steel ballasts for electrical equipment according to claim 1, characterized in that: The movable component includes a third electric push rod (501) fixed through the top of the mounting bracket (5), and a connecting bracket (502) is fixed to the telescopic end of the third electric push rod (501). The slide rail bracket (503) is located at the lower end of the connecting bracket (502) and is fixedly connected.

4. The equipment for producing silicon steel ballasts for electrical equipment according to claim 1, characterized in that: The reciprocating assembly includes a reciprocating screw (504) rotatably connected to a slide rail bracket (503) in the horizontal direction. A slider (505) is slidably connected to the inner wall of the slide rail bracket (503). The slider (505) is threadedly connected to the reciprocating screw (504). The cutting slice (506) is located on the side wall of the slider (505). A protective plate (507) is fixed to the outer wall of the slider (505).

5. The equipment for producing silicon steel ballasts for electrical equipment according to claim 1, characterized in that: The mounting base (1) has a collection shell (601) fixed on the outer wall near the support base (2). A fourth electric push rod (602) is fixed vertically on the collection shell (601). The telescopic end of the fourth electric push rod (602) extends into the collection shell (601) and a pressure plate (603) is fixed at one end. The pressure plate (603) is slidably connected to the collection shell (601). The dust collection shell (6) is connected to the collection shell (601) through a conduit.

6. The equipment for producing silicon steel ballasts for electrical equipment according to claim 1, characterized in that: The lower end of the support base (2) is fixed with a first electric push rod (203), and the telescopic end of the first electric push rod (203) is fixed with a push block (204). The two side walls of the push block (204) are provided with movable rods (3) that are rotatably connected by a rotating shaft. The end of the movable rod (3) is rotatably connected to the lower end of the limiting slide plate (202) by a rotating shaft.

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