A Stern Shaft Zero-Position Tooling and Its Usage Method

Abstract

The present invention relates to the technical field of the alignment of the zero position of the stern shaft and the zero position of the propeller. Specifically, it relates to a zero position tooling for a rotating stern shaft and a using method, which includes a plug rod, a first fastener, a lifting mechanism and a lifting rope; the plug rod includes an insertion end and an exposed end, and a first stop is arranged at the connection between the exposed end and the insertion end; the insertion end is inserted and installed in the flange end hole; a protective sleeve is sleeved on the outer side wall of the insertion end, a lifting mechanism is arranged directly above the flange end hole, one end of the lifting rope is connected to the lifting mechanism, and the other end of the lifting rope is connected to the exposed end; the first fastener is arranged at the rear port, and the first fastener includes a first connection part and a first blocking part. One end of the first connection part is used to connect the insertion end, the other end is connected to the first blocking part, and the first blocking part can prevent the plug rod from being disengaged from the front port. This application can effectively avoid the problem that the lifting rope is cut by the edges and corners of the flange end hole or damage to the flange end hole, and can save time and effort and improve efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of the alignment of the zero position of the stern shaft and the zero position of the propeller. Specifically, it relates to a zero-position tooling for a rotating stern shaft and a usage method thereof. Background Art

[0002] The stern shaft, also known as the tail shaft, is the last section of the shafting. The flange at the head end is connected to the flange of the intermediate shaft by closely fitted bolts; the tail end is conical in shape for installing the propeller.

[0003] Flange end holes are provided on the stern shaft. During the installation of the propeller, it is required that the zero-position line on the stern shaft be aligned with the zero-position line of the propeller. It is necessary to go to the engine room to rotate the stern shaft by using the connection holes between the flange surface of the stern shaft and the flange surface of the intermediate shaft, and use a wire rope or a sling to pass through the flange end hole and then tighten it with a chain hoist. The flange end holes on the stern shaft are machined, and the dimensions of the flange end holes are very precise. Sharp edges will be formed at both ends of the flange end holes and the plane. If a sling is used to pass through the flange end hole, the sling will come into contact with the sharp edges during use and continuously rub against the sharp edges under the load, resulting in the sling being cut; if a wire rope is used to pass through the flange end hole, the inner wall of the flange end hole will be damaged and the hole will be roughened.

[0004] Therefore, in terms of safety: it is easy to cause the sling to break. In terms of quality: using a wire rope will damage the inner wall of the flange end hole. In terms of efficiency: it is necessary to waste labor for operation. Summary of the Invention

[0005] The purpose of the present invention is to provide a zero-position tooling for a rotating stern shaft and a usage method thereof, which can effectively avoid the problem that the lifting rope is cut or the inner wall of the flange end hole is damaged after being connected to the flange end hole on the stern shaft when installing the propeller and aligning the zero-position line of the stern shaft with the zero-position line of the propeller, saving time and effort and improving efficiency.

[0006] Another purpose of the present invention is to provide a usage method of a zero-position tooling for a rotating stern shaft, which can effectively avoid the problem that the lifting rope is cut or the inner wall of the flange end hole is damaged after being connected to the flange end hole on the stern shaft when installing the propeller and aligning the zero-position line of the stern shaft with the zero-position line of the propeller, saving time and effort and improving efficiency.

[0007] The technical solution of the present invention is realized as follows:

[0008] A zero-position tooling for a rotating stern shaft is used to align the zero-position line of the stern shaft with the zero-position line of the propeller when installing the propeller. Flange end holes are provided at the flange end of the stern shaft, and the two ports of the flange end hole are respectively a front port and a rear port. It includes a plug rod, a first fastener, a lifting mechanism and a lifting rope;

[0009] The insertion rod includes an insertion end and an exposed end, and a first stopper is provided at the connection between the exposed end and the insertion end;

[0010] The insertion end is used for being inserted and installed into the flange end hole from the front port, and the first stopper can block the exposed end outside the flange end hole;

[0011] A protective sleeve is sleeved on the outer side wall of the insertion end. The protective sleeve can prevent the insertion end from directly contacting the inner wall of the flange end hole and causing scratches. The lifting mechanism is arranged directly above the flange end hole. One end of the lifting rope is connected to the lifting mechanism, and the other end of the lifting rope is connected to the exposed end;

[0012] The first fastener is arranged at the rear port. The first fastener includes a first connecting portion and a first blocking portion. One end of the first connecting portion is used for connecting the insertion end, and the other end is connected to the first blocking portion. And the first blocking portion can prevent the insertion rod from disengaging from the front port.

[0013] Further, one side surface of the insertion rod is a first side surface, the first side surface is located at the insertion end, and a first mounting hole is formed on the first side surface;

[0014] The first connecting portion is installed in the first mounting hole to realize the connection between the first fastener and the insertion rod.

[0015] Further, the first fastener is a first bolt. The screw rod portion of the first bolt is the first connecting portion, and the nut portion of the first bolt is the first blocking portion;

[0016] The first mounting hole is a first threaded hole, and the first bolt is threadedly connected to the first threaded hole.

[0017] Further, a second stopper is provided at the end of the exposed end. An installation groove is formed between the first stopper and the second stopper. One end of the lifting rope connected to the exposed end is located in the installation groove.

[0018] Further, the insertion rod is a round rod, both the first stopper and the second stopper are circular rings, and the insertion rod, the first stopper and the second stopper are of an integral structure.

[0019] Further, a metal gasket is also included. The metal gasket is sleeved on the first connecting portion.

[0020] Further, a non-metal gasket is also included. The non-metal gasket is sleeved on the first connecting portion, and the metal gasket is located between the non-metal gasket and the first blocking portion.

[0021] Further, the lifting mechanism is selected from an electric hoist or a manual hoist.

[0022] Further, a second fastener is further included, and the second fastener is a second bolt;

[0023] The other side of the insertion rod is the second side, the second side is located at the exposed end, a second threaded hole is formed in the second side, and the second bolt is threadedly connected to the second threaded hole.

[0024] The present application also provides a method for using the zero-position tooling of the propeller shaft:

[0025] S1: First, install the lifting mechanism above the propeller shaft and directly above the flange end hole;

[0026] S2: Insert the insertion end of the insertion rod into the flange end hole from the front port, and the exposed end is blocked outside the flange end hole by the first stopper;

[0027] S3: Install the first fastener at the rear port, connect one end of the first connecting portion to the insertion end, connect the other end of the first connecting portion to the first blocking portion. Under the blocking action of the first blocking portion, the insertion rod is installed in the flange end hole and cannot escape from the front port;

[0028] S4: Connect one end of the lifting rope to the lifting mechanism and the other end to the exposed end.

[0029] Compared with the prior art, the beneficial effects of the present invention are:

[0030] In the present application, by inserting the insertion end of the insertion rod into the flange end hole from the front port of the flange end hole, blocking the exposed end of the insertion rod outside the flange end hole by the first stopper, arranging the first fastener at the rear port of the flange end hole, connecting the first fastener to the insertion rod and preventing the insertion rod from escaping from the front port, and then connecting the exposed end of the insertion rod to the lifting rope, such a design can effectively avoid the problem that the lifting rope is cut by the edges and corners of the flange end hole or damage to the flange end hole, and can save time and effort and improve efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0032] Figure 1Schematic structural diagram of the zero-position tool for the rotating stern shaft in Embodiment 1 of the present invention applied to the stern shaft;

[0033] Figure 2 In Embodiment 1 of the present invention Figure 1 Enlarged view of the structure at position A;

[0034] Figure 3 Schematic structural diagram of the connection between the insertion rod and the protective sleeve in Embodiment 1 of the present invention;

[0035] Figure 4 Schematic structural diagram of the insertion rod in Embodiment 1 of the present invention;

[0036] Figure 5 Schematic structural diagram of the protective sleeve in Embodiment 1 of the present invention.

[0037] In the figure: (Explanation of reference numerals)

[0038] 1 - Insertion rod; 101 - Insertion end; 102 - Exposed end; 103 - First stop member;

[0039] 104 - Protective sleeve; 105 - First side; 106 - First mounting hole;

[0040] 107 - Second stop member; 108 - Second side; 109 - Second threaded hole;

[0041] 2 - First fastener; 3 - Lifting mechanism; 4 - Hoisting rope; 6 - Stern shaft;

[0042] 7 - Metal gasket; 8 - Non-metal gasket; 9 - Second fastener. Detailed implementation manners

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents the selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0045] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0046] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0047] In addition, terms such as "horizontal", "vertical", "hanging" do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0048] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] The following will describe in detail some embodiments of the present invention with reference to the drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0050] Embodiment 1

[0051] A flange end hole is provided on the stern shaft 6. During the installation of the propeller, it is required that the zero line on the stern shaft 6 is aligned with the zero line of the propeller. It is necessary to go to the engine room to rotate the stern shaft 6 by using the connection holes between the flange surface of the stern shaft 6 and the flange surface of the intermediate shaft, and use a steel wire rope or sling to pass through the flange end hole and then tighten it with a chain block. The flange end hole on the stern shaft 6 is machined, and the size of the flange end hole is very precise. Sharp edges will be formed between the two ends of the flange end hole and the plane. If a sling is used to pass through the flange end hole, the sling will come into contact with the sharp edges during use, and under the action of the load, it will continuously rub against the sharp edges, resulting in the sling being cut; if a steel wire rope is used to pass through the flange end hole, the inner wall of the flange end hole will be damaged and the mouth will be roughened.

[0052] Therefore, referring to Figures 1-5 , the present embodiment provides a technical solution as follows:

[0053] A stern shaft zero position tooling includes an insertion rod 1, a first fastener 2, a lifting mechanism 3 and a lifting rope 4. The flange end on the stern shaft 6 includes a front end face and a rear end face. A flange end hole is provided at the flange end of the stern shaft 6. The two ends of the flange end hole are respectively a front port and a rear port. The front port is located at the front end face, and the rear port is located at the rear end face.

[0054] The insertion rod 1 includes an insertion end 101 and an exposed end 102 . A first stopper 103 is provided at the connection between the exposed end 102 and the insertion end 101 , that is, the first stopper 103 is located between the insertion end 101 and the exposed end 102 .

[0055] The insertion end 101 is inserted into the flange hole through the front end thereof, and the first stopper 103 is capable of blocking the exposed end 102 from outside the flange hole. Specifically, after the insertion end 101 is inserted into the flange hole, the first stopper 103 abuts against the front end surface, thereby blocking the exposed end 102 from outside the flange hole.

[0056] The outer wall of the insertion end 101 is provided with a protective cover 104, which can prevent the insertion end 101 from directly contacting the inner wall of the flange end hole and causing scratches. Specifically, the structure of the protective cover 104 is as follows: Figure 5 As shown, the protective sleeve 104 can not only wrap and protect the outer wall of the insertion end 101, but also wrap and protect the outer wall of the first stopper 103. In this way, when the insertion end 101 of the insertion rod 1 is inserted and installed in the flange end hole, the protective sleeve 104 prevents direct contact with the inner wall of the flange end hole or direct contact with the front end face, thereby playing a protective role.

[0057] In this embodiment, the protective cover 104 is preferably made of nylon.

[0058] The first fastener 2 is arranged at the rear port. The first fastener 2 includes a first connecting portion and a first blocking portion. One end of the first connecting portion is used to connect to the insertion end 101, and the other end is connected to the first blocking portion. The first blocking portion can prevent the insertion rod 1 from falling out of the front port.

[0059] In this embodiment, the first fastener 2 has the following two design methods:

[0060] The first type: The first fastener 2 can be a matching screw and nut. The screw is the first connecting part, and the nut is the first blocking part. When in use, one end of the screw is connected to the insertion end 101 by means of threaded connection or welding, and the other end of the screw is connected to the nut by threaded connection. Specifically, after the insertion end 101 is installed in the flange end hole, first connect the screw to the insertion end 101, and then install the nut so that the nut abuts against the rear end face, thereby preventing the plug rod 1 from slipping out of the front port. Thus, the installation of the plug rod 1 is completed.

[0061] The second type: The first fastener 2 is selected as the first bolt. The screw part of the first bolt is the first connecting part, and the nut part of the first bolt is the first blocking part. When in use, after the insertion end 101 is installed in the flange end hole, connect the screw part of the first bolt to the insertion end 101 by threaded connection, and then tighten the first bolt so that the nut part of the first bolt abuts against the rear end face, thereby preventing the plug rod 1 from slipping out of the front port. Thus, the installation of the plug rod 1 is completed.

[0062] In this embodiment, the structure of the first fastener 2 is preferably the second type.

[0063] A lifting mechanism 3 is provided directly above the flange end hole. The lifting mechanism 3 is generally selected as an electric hoist or a manual hoist. One end of the lifting rope 4 is connected to the lifting mechanism 3. After the plug rod 1 is installed in the flange end hole, the other end of the lifting rope 4 is bound or sleeved with the exposed end 102.

[0064] One side surface of the plug rod 1 is the first side surface 105, and the first side surface 105 is located at the insertion end 101. After the structure of the first fastener 2 is selected as the second type, a first mounting hole 106 is correspondingly formed on the first side surface 105, and the first mounting hole 106 is a first threaded hole. The screw part of the first bolt is installed in the first threaded hole to achieve threaded connection therebetween.

[0065] In this embodiment, a second blocking member 107 is provided at the end of the exposed end 102. An installation groove is formed between the first blocking member 103 and the second blocking member 107. When the lifting rope 4 is connected to the exposed end 102, the lifting rope 4 is placed in the installation groove to achieve binding connection or sleeving of the lifting rope 4 with the exposed end 102.

[0066] In this embodiment, the plug rod 1 is a round rod, and both the first blocking member 103 and the second blocking member 107 are circular ring structures. The first blocking member 103 and the second blocking member 107 are sleeved on the outside of the plug rod 1, and the plug rod 1, the first blocking member 103 and the second blocking member 107 are of an integral structure.

[0067] In this embodiment, in order to increase the contact area between the first bolt and the rear end face, a metal gasket 7 is also provided. The metal gasket 7 is sleeved on the screw part of the first bolt.

[0068] In this embodiment, in order to prevent scratches caused by hard contact between the metal gasket 7 and the rear end face, a non-metallic gasket 8 is further provided. The non-metallic gasket 8 is sleeved on the screw portion of the first bolt and is located between the rear end face and the metal gasket 7. The metal gasket 7 is preferably made of high-hardness steel, and the non-metallic gasket 8 is preferably made of elastic nylon.

[0069] In this embodiment, one side of the insertion rod 1 is a first side 105, and the other side is a second side 108. The second side 108 is located at the exposed end 102, and a second threaded hole 109 is defined in the second side 108. The present application also provides a second fastener 9, which is a second bolt. The second bolt is threadedly connected to the second threaded hole 109. Tightening the second bolt can drive the insertion rod 1 to rotate, causing the first stopper 103 to contact the front end face. Tightening the first bolt further stabilizes the installation of the insertion rod 1. A collar is also provided at the end of the second bolt, which is welded to the second bolt. The collar can be manually turned to tighten the second bolt, and the sling 4 can be passed through the collar and bound to the collar.

[0070] In the present application, the insertion end 101 of the insertion rod 1 is inserted into the flange end hole from the front port of the flange end hole, the exposed end 102 of the insertion rod 1 is blocked outside the flange end hole by the first stopper 103, and a first fastener 2 is provided at the rear port of the flange end hole, which is connected to the insertion rod 1 through the first fastener 2 and can prevent the insertion rod 1 from falling out of the front port, and then the exposed end 102 of the insertion rod 1 is connected to the lifting rope. This design can effectively avoid the problem of the lifting rope being cut by the sharp corners of the flange end hole or causing damage to the flange end hole, and can save time and effort and improve efficiency.

[0071] Example 2

[0072] This embodiment provides a method for using the stern shaft zero position tooling in Embodiment 1, and the steps are as follows:

[0073] S1: First, install the lifting mechanism 3 above the stern shaft 6 and directly above the flange end hole;

[0074] S2: Insert the insertion end 101 of the insertion rod 1 into the flange end hole from the front end, and the exposed end 102 is blocked by the first stopper 103 outside the flange end hole;

[0075] S3: Install the first fastener 2 at the rear port, connect one end of the first connecting part to the insertion end 101, and connect the other end of the first connecting part to the first blocking part. Under the blocking action of the first blocking part, the insertion rod 1 is installed in the flange end hole and cannot be detached from the front port.

[0076] S4: Connect one end of the suspension rope 4 to the lifting mechanism 3 and the other end to the exposed end 102, and then complete the alignment operation of the stern shaft zero position line and the propeller zero position line.

[0077] In the present application, the insertion end 101 of the insertion rod 1 is inserted into the flange end hole from the front port of the flange end hole, the exposed end 102 of the insertion rod 1 is blocked outside the flange end hole by the first stopper 103, and a first fastener 2 is provided at the rear port of the flange end hole, which is connected to the insertion rod 1 through the first fastener 2 and can prevent the insertion rod 1 from falling out of the front port, and then the exposed end 102 of the insertion rod 1 is connected to the lifting rope. This design can effectively avoid the problem of the lifting rope being cut by the sharp corners of the flange end hole or causing damage to the flange end hole, and can save time and effort and improve efficiency.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

[0079] Furthermore, those skilled in the art will appreciate that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of the present invention and to form different embodiments. For example, in the claims above, any of the claimed embodiments may be used in any combination. The information disclosed in this background section is intended solely to enhance understanding of the overall background of the present invention and should not be construed as an admission or any form of implication that such information constitutes prior art known to those skilled in the art.

[0080] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

[0081] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A zero-position tooling for a propeller shaft, which is used to align the zero-position line of the propeller shaft (6) with the zero-position line of the propeller when installing the propeller. A flange end hole is provided at the flange end of the propeller shaft (6), and the two ports of the flange end hole are respectively a front port and a rear port. It is characterized in that, It includes an insertion rod (1), a first fastener (2), a lifting mechanism (3) and a lifting rope (4); The insertion rod (1) includes an insertion end (101) and an exposed end (102), and a first stopper (103) is provided at the connection between the exposed end (102) and the insertion end (101); The insertion end (101) is used for being inserted and installed into the flange end hole from the front port, and the first stopper (103) can block the exposed end (102) outside the flange end hole; A protective sleeve (104) is sleeved on the outer side wall of the insertion end (101), and the protective sleeve (104) can prevent the insertion end (101) from directly contacting the inner wall of the flange end hole and causing scratches. The lifting mechanism (3) is arranged directly above the flange end hole. One end of the lifting rope (4) is connected to the lifting mechanism (3), and the other end of the lifting rope (4) is connected to the exposed end (102); The first fastener (2) is arranged at the rear port. The first fastener (2) includes a first connecting portion and a first blocking portion. One end of the first connecting portion is used for connecting the insertion end (101), and the other end is connected to the first blocking portion, and the first blocking portion can prevent the insertion rod (1) from disengaging from the front port.

2. The zero-position tooling for the propeller shaft according to claim 1, characterized in that, One side surface of the insertion rod (1) is a first side surface (105), the first side surface (105) is located at the insertion end (101), and a first mounting hole (106) is formed on the first side surface (105); The first connecting portion is installed in the first mounting hole (106) to realize the connection between the first fastener (2) and the insertion rod (1).

3. The zero-position tooling for the propeller shaft according to claim 2, wherein The first fastener (2) is a first bolt. The screw rod portion of the first bolt is the first connecting portion, and the nut portion of the first bolt is the first blocking portion; The first mounting hole (106) is a first threaded hole, and the first bolt is threadedly connected to the first threaded hole.

4. The zero-position tooling for the propeller shaft according to claim 1, characterized in that, A second stopper (107) is provided at the end of the exposed end (102). An installation groove is formed between the first stopper (103) and the second stopper (107). One end of the lifting rope (4) connected to the exposed end (102) is located in the installation groove.

5. The zero-position tooling for the screw propeller shaft according to claim 4, characterized in that The insertion rod (1) is a round rod. Both the first stopper (103) and the second stopper (107) are circular rings, and the insertion rod (1), the first stopper (103) and the second stopper (107) are of an integral structure.

6. The zero-position tooling for the screw propeller shaft according to claim 1, wherein It further includes a metal gasket (7), and the metal gasket (7) is sleeved on the first connecting portion.

7. The zero-position tooling for the propeller shaft according to claim 6, characterized in that, It further includes a non-metal gasket (8), and the non-metal gasket (8) is sleeved on the first connecting portion, and the metal gasket (7) is located between the non-metal gasket (8) and the first blocking portion.

8. The zero-position tooling for the propeller shaft according to claim 1, wherein, The lifting mechanism (3) is selected from an electric hoist or a manual hoist.

9. The zero-position tooling for the propeller shaft according to claim 1, characterized in that It further includes a second fastener (9), and the second fastener (9) is a second bolt; Another side of the insertion rod (1) is the second side (108). The second side (108) is located at the exposed end (102). A second threaded hole (109) is formed in the second side (108). The second bolt is threadedly connected to the second threaded hole (109).

10. The method for using the zero-position tooling for the propeller shaft according to any one of claims 1-9, characterized in that S1: First, install the lifting mechanism (3) above the propeller shaft (6) and directly above the flange end hole; S2: Insert the insertion end (101) of the insertion rod (1) into the flange end hole from the front port, and the exposed end (102) is blocked outside the flange end hole by the first stopper (103); S3: Install the first fastener (2) at the rear port, connect one end of the first connecting portion to the insertion end (101), and connect the other end of the first connecting portion to the first blocking portion. Under the blocking action of the first blocking portion, the insertion rod (1) is installed in the flange end hole and cannot escape from the front port; S4: Connect one end of the lifting rope (4) to the lifting mechanism (3) and the other end to the exposed end (102).

Images