Tail shaft sealing device for ship accessory manufacturing

Abstract

The utility model belongs to the technical field of stern shaft sealing, and particularly relates to a stern shaft sealing device for ship accessory manufacturing, which comprises a stern shaft body. The outer side wall of the stern shaft body is sleeved with a sealing device body. Expansion boxes are fixedly connected to the top and the bottom of the sealing device body; a first storage groove is formed in one end of the inner side of the extension box; a second storage groove is formed in the expansion box; the inner side of the first storage groove is rotationally connected with a first attaching rotating wheel. In the working process, in the sliding process of the sliding rail, impurities at the joint of the sealing device body and the tail shaft body can be pushed to be discharged outwards, and therefore the cleanliness of the joint of the sealing device body and the tail shaft body is improved; according to the whole device, the situation that part of impurities or sea grass is prone to being attached to the connecting position of the sealing device body and the tail shaft body, and consequently the sealing effect of the sealing device is damaged is reduced; the whole device improves the stability of the sealing device body and the tail shaft body during long-time working.

Description

Technical Field

[0001] The utility model belongs to the technical field of stern shaft sealing, in particular to a stern shaft sealing device used for manufacturing ship accessories. Background Art

[0002] During the manufacturing process of ship accessories, in order to reduce the leakage of lubricating oil in the stern shaft when working in seawater, a stern shaft sealing device is often installed at the stern shaft position to ensure the normal operation of the ship.

[0003] In the current prior art, the stern shaft sealing device manufactured by ship accessories is often composed of a sealing sleeve and a mechanical sealing device, wherein the sealing sleeve includes a sealing ring, a sealing ring and a sealing gasket, and can achieve sealing work on the stern shaft by cooperating with the mechanical sealing device.

[0004] The existing stern shaft sealing device manufactured by ship accessories often contains a certain amount of impurities in seawater. During long-term operation, some impurities or seaweed are easy to adhere to the connection between the sealing device and the stern shaft, which can easily lead to the damage of the sealing effect of the sealing device. Therefore, in order to solve the above problem, a stern shaft sealing device for ship accessories manufacturing is proposed. Utility Model Content

[0005] In order to make up for the deficiencies of the prior art and solve at least one technical problem raised in the background technology, the utility model proposes a stern shaft sealing device for manufacturing ship accessories.

[0006] The technical solution adopted by the utility model to solve its technical problems is: the utility model describes a stern shaft sealing device for the manufacture of ship accessories, comprising a stern shaft body; the outer wall of the stern shaft body is sleeved with a sealing device body; the top and bottom of the sealing device body are fixedly connected to an expansion box; a first storage groove is opened at one end of the inner side of the expansion box; a second storage groove is opened inside the expansion box; a first fitting rotating wheel is rotatably connected to the inner side of the first storage groove; the outer side wall of the first fitting rotating wheel and the outer side wall of the stern shaft body are mutually fitted; the outer side wall of the first fitting rotating wheel is rotatably connected to a first transmission belt; the inner side of the first storage groove is rotatably connected to a first rotating column; the outer side wall of the first rotating column and the inner side wall of the first transmission belt are mutually fitted; the first rotating column is fixedly connected to the first transmission gear at one end close to the second storage groove; the first transmission The movable gear is arranged on the inner side of the second storage slot; the inner side wall of the second storage slot close to the first storage slot is rotatably connected to the second transmission gear; the second transmission gear and the first transmission gear are meshed with each other; the inner bottom of the second storage slot is rotatably connected to the second rotating column; the outer side wall of the second rotating column is rotatably connected to the second transmission belt; the inner side wall of the second transmission belt and the outer side wall of the second transmission gear are in contact with each other; the top of the second rotating column is rotatably connected to the first rotating plate; the first rotating plate is rotatably connected to the second rotating plate at one end away from the first contact rotating wheel; the side wall of the inner side of the second storage slot away from the first contact rotating wheel is fixedly connected to a slide rail; the inner side of the slide rail is slidably connected to a slider; the slider is rotatably connected to the second rotating plate; the slider is fixedly connected to the second rotating plate at one end away from the first contact rotating wheel; the cleaning push plate is arranged on the outer side of the stern shaft body.

[0007] Preferably, the side wall of the cleaning push plate is penetrated by a first slide groove; the inner side of the first slide groove is slidably connected to a limiting column; the limiting column and the side wall of the expansion box are connected to each other; the limiting column is fixedly connected to a first connecting plate at one end away from the expansion box; the top of the first connecting plate is fixedly connected to an end close to the expansion box; a cleaning scraper is sleeved on the outer side wall of the slide rail; the cleaning scraper and the second connecting plate are connected to each other; a pair of second fitting wheels are rotatably connected to the inner side wall of the first slide groove; the outer side wall of the second fitting wheel and the outer side wall of the limiting column are fitted to each other.

[0008] Preferably, a second slide groove is provided on the inner wall of the cleaning push plate; a plurality of groups of spring columns are fixedly connected to one end of the inner side of the second slide groove near the limiting column; a fitting soft plate is slidably connected to the inner side of the second slide groove; and the fitting soft plate and the spring column are connected to each other.

[0009] Preferably, a third rotating column is rotatably connected to the inner top of the second storage groove; a third fitting rotating wheel is rotatably connected to the inner wall of the second transmission belt; and the third fitting rotating wheel and the third rotating column are connected to each other.

[0010] Preferably, a first magnetic plate is fixedly connected to one end of the laminating soft plate near the limiting column; a second magnetic plate is fixedly connected to one end of the inner side of the second slide groove near the limiting column; the first magnetic plate and the second magnetic plate are both arranged on the inner side of a pair of spring columns.

[0011] Preferably, a sealing sleeve is fixedly connected to the side wall of the expansion box; the sealing sleeve is sleeved on the outside of the slide rail; a sealing ring is fixedly connected to one end of the sealing sleeve away from the expansion box; the inner wall of the sealing sleeve is in contact with the outer wall of the slide rail.

[0012] Preferably, cleaning brushes are fixedly connected to both sides of one end of the cleaning push plate close to the stern shaft body.

[0013] Beneficial effects of the utility model:

[0014] 1. The utility model provides a stern shaft sealing device for manufacturing ship accessories, when the second rotating column rotates, the first rotating plate and the second rotating plate can push the sliding block to move back and forth inside the sliding rail, and during the movement of the sliding rail, the impurities at the connection between the sealing device body and the stern shaft body can be pushed to the outside, thereby improving the cleanliness of the connection between the sealing device body and the stern shaft body; the overall device reduces the possibility of some impurities or seaweed adhering to the connection between the sealing device body and the stern shaft body, thereby causing the sealing effect of the sealing device to be damaged; the overall device improves the stability of the sealing device body and the stern shaft body when working for a long time.

[0015] 2. The utility model provides a stern shaft sealing device for the manufacture of ship accessories, and during the movement of the slide rail, the cleaning scraper can clean the impurities attached to the surface of the slide rail, thereby reducing the occurrence of impurities attached to the surface of the slide rail entering the second storage slot through the connection between the slide rail and the extension box; and during the movement of the cleaning push plate, a pair of second fitting wheels rotate together, and the second fitting wheels can effectively reduce the friction between the first slide groove and the limit column, thereby improving the working life of the first slide groove and the limit column. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 It is a three-dimensional diagram of the stern shaft body of the utility model;

[0018] Figure 2 It is a three-dimensional diagram of the sealing device body in the utility model;

[0019] Figure 3 It is a three-dimensional diagram of the slide rail in the utility model.

[0020] Legend:

[0021] 1. Stern shaft body; 11. Sealing device body; 12. Extension box; 13. First storage slot; 14. Second storage slot; 15. First fitting wheel; 16. First transmission belt; 17. First rotating column; 18. First transmission gear; 19. Second transmission gear; 110. Second rotating column; 111. Second transmission belt; 112. First rotating plate; 113. Second rotating plate; 114. Sliding block; 115. Slide rail; 116. Cleaning push plate; 2. First slide slot; 21. Limiting column; 22. First connecting plate; 23. Second connecting plate; 24. Cleaning scraper; 25. Second fitting wheel; 3. Second slide slot; 31. Spring column; 32. Fitting soft board; 4. Third rotating column; 41. Third fitting wheel; 5. First magnetic plate; 51. Second magnetic plate; 6. Sealing sleeve; 61. Sealing ring; 7. Cleaning brush. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Specific examples are given below.

[0024] See also Figure 1-Figure 3The utility model provides a stern shaft sealing device for manufacturing ship accessories, comprising a stern shaft body 1; a sealing device body 11 is sleeved on the outer wall of the stern shaft body 1; an expansion box 12 is fixedly connected to the top and bottom of the sealing device body 11; a first storage groove 13 is opened at one end of the inner side of the expansion box 12; a second storage groove 14 is opened inside the expansion box 12; a first fitting rotating wheel 15 is rotatably connected to the inner side of the first storage groove 13; the outer side wall of the first fitting rotating wheel 15 is mutually fitted with the outer side wall of the stern shaft body 1; the outer side wall of the first fitting rotating wheel 15 is rotatably connected to the first transmission belt 16; the inner side of the first storage groove 13 is rotatably connected to the first rotating column 17; the outer side wall of the first rotating column 17 is connected to the inner side of the first transmission belt 16 The side walls fit together; the first rotating column 17 is fixedly connected to the first transmission gear 18 at one end close to the second storage slot 14; the first transmission gear 18 is arranged on the inner side of the second storage slot 14; the inner side wall of the second storage slot 14 close to the first storage slot 13 is rotatably connected to the second transmission gear 19; the second transmission gear 19 and the first transmission gear 18 are meshed with each other; the second rotating column 110 is rotatably connected to the bottom of the inner side of the second storage slot 14; the second rotating column 110 is rotatably connected to the outer side wall of the second transmission belt 111; the inner side wall of the second transmission belt 111 and the outer side wall of the second transmission gear 19 fit together; the top of the second rotating column 110 is rotatably connected to the first rotating plate 112; the first rotating plate 112 is away from the first fitting rotating plate One end of the wheel 15 is rotatably connected to a second rotating plate 113; a sliding rail 115 is fixedly connected to the side wall of the inner side of the second storage groove 14 away from the first fitting rotating wheel 15; a slider 114 is slidably connected to the inner side of the sliding rail 115; the slider 114 and the second rotating plate 113 are rotatably connected; the end of the slider 114 away from the first fitting rotating wheel 15 is fixedly connected to a cleaning push plate 116; the cleaning push plate 116 is arranged on the outer side of the stern shaft body 1; during operation, during the rotation of the sealing device body 11, the first fitting rotating wheel 15 can drive the first transmission belt 16 to rotate, and the first transmission belt 16, the first rotating column 17 and the first transmission gear 18 cooperate with each other to drive the second transmission gear 19 to rotate, and the second transmission belt 111 drives the second The rotating column 110 is connected to the second transmission gear 19, thereby driving the second rotating column 110 to rotate together; while the second rotating column 110 rotates, the first rotating plate 112 and the second rotating plate 113 can push the slider 114 to reciprocate inside the slide rail 115, and during the movement of the slide rail 115, impurities at the connection between the sealing device body 11 and the stern shaft body 1 can be pushed to the outside, thereby improving the cleanliness of the connection between the sealing device body 11 and the stern shaft body 1; the overall device reduces the possibility of some impurities or seaweed adhering to the connection between the sealing device body 11 and the stern shaft body 1, thereby causing the sealing effect of the sealing device to be damaged; the overall device improves the stability of the sealing device body 11 and the stern shaft body 1 when working for a long time.

[0025] Further, such as Figure 3 As shown, the side wall of the cleaning push plate 116 is penetrated by a first slide groove 2; the inner side of the first slide groove 2 is slidably connected to a limiting column 21; the limiting column 21 is connected to the side wall of the expansion box 12; the limiting column 21 is fixedly connected to a first connecting plate 22 at one end away from the expansion box 12; the top of the first connecting plate 22 is fixedly connected to an end close to the expansion box 12; a cleaning scraper 24 is sleeved on the outer side wall of the slide rail 115; the cleaning scraper 24 and the second connecting plate 23 are connected to each other; a pair of second fitting wheels 25 are rotatably connected to the inner side wall of the first slide groove 2; the outer side wall of the second fitting wheel 25 is fitted with the outer side wall of the limiting column 21; when working, the first slide groove 2 and the limiting column 21 cooperate with each other to push the cleaning push plate 116. The plate 116 performs supporting work, thereby reducing the stability of the slide rail 115 and the cleaning push plate 116 when working for a long time, and reducing the downward tilt of the cleaning push plate 116 away from the end of the expansion box 12; and in the process of the movement of the slide rail 115, the cleaning scraper 24 can clean the impurities attached to the surface of the slide rail 115, thereby reducing the impurities attached to the surface of the slide rail 115 from entering the second storage slot 14 through the connection between the slide rail 115 and the expansion box 12; and in the process of the movement of the cleaning push plate 116, a pair of second fitting wheels 25 rotate together, and the second fitting wheels 25 can effectively reduce the friction between the first slide groove 2 and the limit column 21, thereby improving the working life of the first slide groove 2 and the limit column 21.

[0026] Further, such as Figure 3 As shown, a second slide groove 3 is provided on the inner wall of the cleaning push plate 116; a plurality of groups of spring columns 31 are fixedly connected to one end of the inner side of the second slide groove 3 near the limiting column 21; a fitting soft plate 32 is slidably connected to the inner side of the second slide groove 3; the fitting soft plate 32 and the spring column 31 are connected to each other; when working, the fitting soft plate 32 can push the spring column 31 to move inside the second slide groove 3, so that the bottom end of the fitting soft plate 32 and the outer side wall of the stern shaft body 1 fit each other; the overall device improves the effect of cleaning the connection between the sealing device body 11 and the stern shaft body 1; the overall device reduces the possibility that some impurities or seaweed are easily attached to the connection between the sealing device body 11 and the stern shaft body 1, thereby causing the sealing effect of the sealing device to be damaged.

[0027] Further, such as Figure 3As shown, the third rotating column 4 is rotatably connected to the top inner side of the second storage groove 14; the third fitting wheel 41 is rotatably connected to the inner wall of the second transmission belt 111; the third fitting wheel 41 and the third rotating column 4 are connected to each other; when working, the third rotating column 4 and the third fitting wheel 41 cooperate with each other to support the middle part of the second transmission belt 111, thereby reducing the situation where the middle part of the second transmission belt 111 tilts downward due to the long-term operation of the second transmission belt 111; the overall device improves the stability of the second transmission belt 111 when it works for a long time.

[0028] Further, such as Figure 3 As shown, the bonding soft plate 32 is fixedly connected to the first magnetic plate 5 at one end close to the limiting column 21; the second magnetic plate 51 is fixedly connected to the inner side of the second slide groove 3 close to the limiting column 21; the first magnetic plate 5 and the second magnetic plate 51 are both arranged on the inner side of a pair of spring columns 31; when working, the first magnetic plate 5 and the second magnetic plate 51 repel each other due to magnetic force, so that the bottom end of the bonding soft plate 32 is more closely attached to the outer wall of the stern shaft body 1; the overall effect of the bonding soft plate 32 in cleaning the surface of the stern shaft body 1 is improved.

[0029] Further, such as Figure 3 As shown, the side wall of the expansion box 12 is fixedly connected with a sealing sleeve 6; the sealing sleeve 6 is sleeved on the outside of the slide rail 115; the sealing sleeve 6 is fixedly connected with a sealing ring 61 at one end away from the expansion box 12; the inner wall of the sealing sleeve 6 and the outer wall of the slide rail 115 fit each other; when working, the sealing sleeve 6 and the sealing ring 61 cooperate with each other to seal the connection between the slide rail 115 and the expansion box 12, and the overall device reduces the occurrence of external impurities entering the second storage slot 14 through the connection between the slide rail 115 and the expansion box 12; the overall device improves the cleanliness of the inside of the second storage slot 14.

[0030] Further, such as Figure 1 As shown, cleaning brushes 7 are fixedly connected to both sides of one end of the cleaning push plate 116 close to the stern shaft body 1; when working, the cleaning brushes 7 can increase the area of ​​the cleaning push plate 116 cleaning the stern shaft body 1; the overall device improves the stability of the stern shaft body 1 when working for a long time.

[0031] Working principle: During operation, during the rotation of the sealing device body 11, the first contact wheel 15 can drive the first transmission belt 16 to rotate, and the first transmission belt 16, the first rotating column 17 and the first transmission gear 18 cooperate with each other to drive the second transmission gear 19 to rotate, and because the second transmission belt 111 connects the second rotating column 110 and the second transmission gear 19 to each other, the second rotating column 110 is driven to rotate together; while the second rotating column 110 rotates, the first rotating plate 112 and the second rotating plate 113 can push the slider 114 to reciprocate on the inner side of the slide rail 115, and during the movement of the slide rail 115, impurities at the connection between the sealing device body 11 and the stern shaft body 1 can be pushed to the outside. The cleaning plate 116 is supported by the first slide groove 2 and the limiting column 21, thereby reducing the stability of the slide rail 115 and the cleaning push plate 116 when they work for a long time, and reducing the downward tilt of the cleaning push plate 116 away from the end of the expansion box 12; and during the movement of the slide rail 115, the cleaning scraper 24 can be used to support the slide rail 115 and the cleaning push plate 116. 5, thereby reducing the impurities attached to the surface of the slide rail 115 from entering the second storage slot 14 through the connection between the slide rail 115 and the expansion box 12; and in the process of moving the cleaning push plate 116, a pair of second fitting wheels 25 rotate together, and the second fitting wheels 25 can effectively reduce the friction between the first slide slot 2 and the limiting column 21, thereby improving the working life of the first slide slot 2 and the limiting column 21; the fitting soft plate 32 can push the spring column 31 to move inside the second slide slot 3, so that the bottom end of the fitting soft plate 32 and the outer side wall of the stern shaft body 1 fit each other; the overall device improves the effect of cleaning the connection between the sealing device body 11 and the stern shaft body 1; the overall device The situation that some impurities or seaweeds are easily attached to the connection between the sealing device body 11 and the stern shaft body 1, thereby causing the sealing effect of the sealing device to be damaged; the third rotating column 4 cooperates with the third bonding rotating wheel 41 to support the middle part of the second transmission belt 111, thereby reducing the situation that the second transmission belt 111 works for a long time, causing the middle part of the second transmission belt 111 to tilt downward; the overall device improves the stability of the second transmission belt 111 when it works for a long time; the first magnetic plate 5 and the second magnetic plate 51 repel each other due to magnetic force, so that the bottom end of the bonding soft plate 32 is more closely attached to the outer wall of the stern shaft body 1; the cleaning effect of the bonding soft plate 32 on the surface of the stern shaft body 1 is improved as a whole;The sealing sleeve 6 and the sealing ring 61 cooperate with each other to seal the connection between the slide rail 115 and the expansion box 12. The overall device reduces the possibility of external impurities entering the second storage tank 14 through the connection between the slide rail 115 and the expansion box 12; the overall device improves the cleanliness of the inside of the second storage tank 14; the cleaning brush 7 can increase the area of ​​the cleaning push plate 116 to clean the stern shaft body 1; the overall device improves the stability of the stern shaft body 1 when working for a long time. ;

[0032] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A stern shaft sealing device for manufacturing ship accessories, comprising a stern shaft body (1); the outer wall of the stern shaft body (1) is sleeved with a sealing device body (11); the characteristics are: The top and bottom of the sealing device body (11) are fixedly connected to an expansion box (12); a first storage groove (13) is provided at one end of the inner side of the expansion box (12); a second storage groove (14) is provided inside the expansion box (12); a first fitting wheel (15) is rotatably connected to the inner side of the first fitting wheel (13); the outer side wall of the first fitting wheel (15) is mutually fitted with the outer side wall of the stern shaft body (1); a first transmission belt (16) is rotatably connected to the outer side wall of the first fitting wheel (15) ; The first storage slot (13) is rotatably connected to a first rotating column (17); the outer wall of the first rotating column (17) and the inner wall of the first transmission belt (16) are in contact with each other; the first rotating column (17) is fixedly connected to a first transmission gear (18) at one end close to the second storage slot (14); the first transmission gear (18) is arranged on the inner side of the second storage slot (14); the inner side of the second storage slot (14) is rotatably connected to a second transmission gear (19) at a side wall close to the first storage slot (13); The second transmission gear (19) is meshed with the first transmission gear (18); the second storage slot (14) is rotatably connected to the bottom inner side of the second storage slot (14); the second transmission belt (111) is rotatably connected to the outer side wall of the second transmission belt (111); the inner side wall of the second transmission belt (111) is in contact with the outer side wall of the second transmission gear (19); the top of the second transmission column (110) is rotatably connected to the first rotating plate (112); the first rotating plate (112) is away from the first contact rotating wheel ( The second rotating plate (113) is rotatably connected to one end of the second storage groove (14); a sliding rail (115) is fixedly connected to the side wall of the inner side of the second storage groove (14) away from the first fitting rotating wheel (15); a sliding block (114) is slidably connected to the inner side of the sliding rail (115); the sliding block (114) and the second rotating plate (113) are rotatably connected; a cleaning push plate (116) is fixedly connected to one end of the sliding block (114) away from the first fitting rotating wheel (15); the cleaning push plate (116) is arranged on the outer side of the stern shaft body (1).

2. A stern shaft sealing device for ship fittings manufacturing according to claim 1, characterized in that: The side wall of the cleaning push plate (116) is penetrated by a first slide groove (2); the inner side of the first slide groove (2) is slidably connected to a limiting column (21); the limiting column (21) and the side wall of the expansion box (12) are mutually connected; the limiting column (21) is fixedly connected to a first connecting plate (22) at one end away from the expansion box (12); the top of the first connecting plate (22) is fixedly connected to an end close to the expansion box (12); the outer side wall of the slide rail (115) is sleeved with a cleaning scraper (24); the cleaning scraper (24) and the second connecting plate (23) are mutually connected; the inner side wall of the first slide groove (2) is rotatably connected to a pair of second fitting wheels (25); the outer side wall of the second fitting wheel (25) and the outer side wall of the limiting column (21) are mutually fitted.

3. A stern shaft sealing device for ship fittings manufacturing as claimed in claim 2, characterized in that: The inner wall of the cleaning push plate (116) is provided with a second slide groove (3); a plurality of groups of spring columns (31) are fixedly connected to one end of the inner side of the second slide groove (3) close to the limit column (21); a fitting soft plate (32) is slidably connected to the inner side of the second slide groove (3); the fitting soft plate (32) and the spring column (31) are connected to each other.

4. A stern shaft sealing device for ship fittings manufacturing according to claim 1, characterized in that: The inner top of the second storage groove (14) is rotatably connected to a third rotating column (4); the inner wall of the second transmission belt (111) is rotatably connected to a third laminating rotating wheel (41); the third laminating rotating wheel (41) and the third rotating column (4) are connected to each other.

5. A stern shaft sealing device for ship fittings manufacturing as claimed in claim 3, characterized in that: The bonding soft plate (32) is fixedly connected to a first magnetic plate (5) at one end close to the limiting column (21); the inner side of the second sliding groove (3) is fixedly connected to a second magnetic plate (51) at one end close to the limiting column (21); the first magnetic plate (5) and the second magnetic plate (51) are both arranged on the inner side of a pair of spring columns (31).

6. A stern shaft sealing device for ship fittings manufacturing according to claim 1, characterized in that: A sealing sleeve (6) is fixedly connected to the side wall of the expansion box (12); the sealing sleeve (6) is sleeved on the outside of the slide rail (115); a sealing ring (61) is fixedly connected to one end of the sealing sleeve (6) away from the expansion box (12); the inner wall of the sealing sleeve (6) and the outer wall of the slide rail (115) are in contact with each other.

7. A stern shaft sealing device for ship fittings manufacturing according to claim 1, characterized in that: Cleaning brushes (7) are fixedly connected to both sides of one end of the cleaning push plate (116) close to the stern shaft body (1).

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