Tooling and method for lifting through bolts together with upper positioning blocks and nuts.

Abstract

A fixture for lifting through bolts together with an upper positioning block and a nut is disclosed. The upper positioning block is fitted onto the upper part of the through bolt, and the nut is screwed onto the through bolt above the upper positioning block. The fixture is connected to the upper positioning block and includes an upper side plate, a lower side plate, a connecting rod, and a fixing bolt. The lower side plate is horizontally fixed to the upper surface of the upper positioning block by the fixing bolt, and the upper side plate rests horizontally on the upper surface of the nut. The upper end of the connecting rod is fixedly connected to the upper side plate, and the lower end is fixedly connected to the lower side plate. When lifting the through bolt, the upper positioning block is connected to the nut through the fixture, and the nut is threaded to the through bolt, thus allowing the upper positioning block, nut, and through bolt to be lifted together as a whole. This invention has a simple structure, is easy to operate, optimizes the process flow, and improves production efficiency. It facilitates the disassembly of through bolts in main engine plants and provides convenient conditions for main engine reassembly in shipyards.

Description

Technical Field

[0001] This invention relates to the assembly process of marine diesel engines, and in particular to a tooling and method for lifting through bolts together with upper positioning blocks and nuts, belonging to the field of diesel engine manufacturing technology. Background Technology

[0002] With the continuous development of the shipping industry, the demand for marine diesel engines has also increased significantly. After the marine diesel engine has completed its trial run at the main engine plant, the main engine needs to be disassembled, lifted off the test bench, and shipped. Through bolts are components that connect the cylinder block, frame, and engine base. These through bolts have an upper locating block fitted on them and a nut screwed onto them. Currently, the common method for disassembling through bolts is to first remove the locating block and nut separately from the through bolt, and then lift the through bolt out. During shipment, the locating block and nut are packed separately and not connected to the through bolt. Upon arrival at the shipyard, when reassembling the diesel engine, the upper locating block and nut are first installed on the through bolt before the engine is installed.

[0003] Existing methods are time-consuming, labor-intensive, and involve complicated procedures. Diesel engine manufacturers and shipyards need to reduce time and improve efficiency when performing diesel engine disassembly and assembly operations in order to better meet market demands. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a tooling and method for lifting through bolts together with upper positioning blocks and nuts. After the test run of a marine low-speed diesel engine is completed, the upper positioning blocks and nuts can be safely, efficiently and conveniently removed and lifted together with the through bolts during disassembly, thereby optimizing the process flow and improving production efficiency. At the same time, it provides convenient conditions for the main engine reassembly in shipyards.

[0005] The technical solution of the present invention is as follows:

[0006] A tooling for lifting a through bolt together with an upper positioning block and a nut, wherein the upper positioning block is fitted onto the upper part of the through bolt, and the nut is screwed onto the through bolt above the upper positioning block, characterized in that: the tooling connected to the upper positioning block includes an upper side plate, a lower side plate, a connecting rod, and a fixing bolt; the lower side plate is horizontally fixed to the upper surface of the upper positioning block by the fixing bolt, the upper side plate rests horizontally on the upper surface of the nut, and the upper end of the connecting rod is fixedly connected to the upper side plate, and the lower end is fixedly connected to the lower side plate;

[0007] When the through bolt is lifted, the upper positioning block is connected to the nut through the tooling, and the nut is connected to the through bolt through threads, so that the upper positioning block and the nut and the through bolt are lifted together as a whole.

[0008] Furthermore, the upper side plate is a "U"-shaped plate with a slot spacing greater than the outer diameter of the through bolt and smaller than the outer circumference diameter of the nut, so that it can rest on the upper surface of the nut.

[0009] Furthermore, the lower side plate is a "U"-shaped plate with a groove spacing greater than the outer diameter of the through bolt and smaller than the outer circumferential diameter of the upper positioning block, so as to be fixedly connected to the upper surface of the upper positioning block.

[0010] Furthermore, the upper surface of the upper positioning block is provided with a threaded hole, and the lower side plate is provided with a connecting through hole for passing through the fixing bolt. The position of the connecting through hole corresponds to the position of the threaded hole.

[0011] Furthermore, the upper side plate has the same size and shape as the lower side plate, and also has a connecting through hole so that it can be used interchangeably with the lower side plate, thus enabling the tooling to be used in both directions.

[0012] Furthermore, the upper and lower side plates are made of steel plates, and the connecting rod is made of round steel with its upper and lower ends welded to the upper and lower side plates respectively.

[0013] Furthermore, the length of the connecting rod is greater than the height of the nut.

[0014] Furthermore, the number of connecting rods is four.

[0015] Another technical solution of the present invention is:

[0016] A method for lifting a through bolt, an upper positioning block, and a nut using the above-mentioned tooling is characterized in that: the lower side plate of the tooling is fixed to the upper surface of the upper positioning block using the fixing bolt, and the upper side plate is placed on the upper surface of the nut; when lifting the through bolt, the upper positioning block and the nut are lifted together.

[0017] Furthermore, the method includes the following specific steps:

[0018] 1) Place the lower side plate on the upper plane of the upper positioning block, so that the nut is located between the upper and lower side plates of the tooling;

[0019] 2) Use the fixing bolt to pass through the connecting through hole of the lower side plate and tighten it into the threaded hole of the upper positioning block, thereby fixing the tooling to the upper positioning block;

[0020] 3) Tighten the nut upwards until the upper surface of the nut touches the lower surface of the upper side plate, so that the tooling rests on the nut and the upper positioning block is connected to the nut;

[0021] 4) Lift the through bolt, which drives the nut through the thread, and the nut drives the upper positioning block through the tooling, so that the upper positioning block and the nut and the through bolt are lifted together as a whole.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] The tooling has a simple structure and is easy to operate, making the operation more convenient and safer, and greatly improving the efficiency of the operation. At the same time, the through bolt, the upper positioning block and the nut are shipped together, which not only makes it convenient for the main engine plant to complete the disassembly of the through bolt of the marine diesel engine, but also allows the shipyard to install the through bolt at the same time as the upper positioning block and the nut, reducing the number of procedures, saving time and achieving the effect of convenient operation, high efficiency and reliability. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention.

[0025] Figure 2 This is a top view of the lower side panel.

[0026] Figure 3 This is a diagram showing the usage state of the present invention.

[0027] In the picture,

[0028] L—slot spacing, 1—through bolt, 2—nut, 3—upper positioning block, 4—lower side plate, 41—connecting through hole, 5—connecting rod, 6—fixing bolt, 7—upper side plate. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. However, the following embodiments are not intended to limit the scope of the present invention. All equivalent substitutions and modifications made based on the content of this specification should fall within the scope of protection claimed by the present invention.

[0030] This invention is used for lifting operations involving through bolts, upper positioning blocks, and nuts together. Please refer to [link / reference]. Figure 3 The upper positioning block 3 is fitted onto the upper part of the through bolt 1, and the nut 2 is threaded onto the through bolt 1 above the upper positioning block 3. When the through bolt 1 is lifted, the upper positioning block 3 is connected to the nut 2 through a tooling, and the nut 2 is threaded onto the through bolt 1, so that the upper positioning block 3 and the nut 2 are lifted together as a whole with the through bolt 1.

[0031] Example

[0032] The tooling is connected to the upper positioning block 3. Please refer to [link / reference]. Figure 1 The tooling includes an upper side plate 7, a lower side plate 4, four connecting rods 5 and two fixing bolts 6.

[0033] Please see Figure 2 The lower side plate 4 is horizontally fixed to the upper surface of the upper positioning block 3 by the fixing bolts 6. The lower side plate 4 is a "U"-shaped plate with a groove spacing L greater than the outer diameter of the through bolt 1 and smaller than the outer circumference diameter of the upper positioning block 3, so as to fix it to the upper surface of the upper positioning block 3. The upper surface of the upper positioning block 3 has threaded holes symmetrically arranged along the diameter direction, and the lower side plate 4 has symmetrically arranged connecting through holes 41 for passing through the fixing bolts 6, the positions of which correspond to the positions of the threaded holes of the upper positioning block 3. The fixing bolts 6 pass through the washer and the connecting through holes 41 of the lower side plate 4 and are tightened into the threaded holes of the upper positioning block 3, thereby fixing the tooling to the upper positioning block 3.

[0034] Please see Figure 3 The upper side plate 7 rests horizontally on the upper surface of the nut 2. The upper side plate 7 is a "U" shaped plate with slots that are larger than the outer diameter of the through bolt 1 and smaller than the outer circumference diameter of the nut 2, so that it can rest on the upper surface of the nut 2.

[0035] Please see Figure 3 The upper side plate 7 and the lower side plate 4 are made of steel plates, and the four connecting rods 5 are made of round steel. The upper end of each connecting rod 5 is welded to the upper side plate 7, and the lower end is welded to the lower side plate 4. The length of each connecting rod 5 is greater than the height of the nut 2, so that the nut 2 can be positioned between the upper side plate 7 and the lower side plate 4.

[0036] The upper side plate 7 can have the same size and shape as the lower side plate 4, and it also has a connecting through hole so that it can be used interchangeably with the lower side plate 4. This allows the tooling to be installed upside down, with the upper side plate 7 connected to the upper positioning block 3, and the lower side plate 4 resting on the upper surface of the nut 2, thus achieving a convenient use effect.

[0037] Please see Figure 3The method for lifting the through bolt 1 together with the upper positioning block and nut according to the present invention is as follows: the lower side plate 4 of the tooling is fixed to the upper surface of the upper positioning block 3 using the fixing bolt 6, and the upper side plate 7 is placed on the upper surface of the nut 2. When lifting the through bolt 1, the upper positioning block 3 and the nut 2 are lifted together simultaneously. Specifically, the method includes the following steps:

[0038] 1) Place the lower side plate 4 on the upper plane of the upper positioning block 3, so that the nut 2 is located between the upper side plate 7 and the lower side plate 4 of the tooling;

[0039] 2) The fixing bolt 6 is passed through the connecting through hole 41 of the lower side plate 4 and tightened into the threaded hole of the upper positioning block 3, thereby fixing the tooling to the upper positioning block 3.

[0040] 3) Tighten the nut 2 upwards until the upper surface of the nut 2 touches the lower surface of the upper side plate 7, so that the tooling rests on the nut 2, and connect the upper positioning block 3 to the nut 2;

[0041] 4) Lift the through bolt 1. The through bolt 1 drives the nut 2 through the thread. The nut 2 drives the upper positioning block 3 through the tooling, so that the upper positioning block 3 and the nut 2 and the through bolt 1 are lifted together as a whole.

[0042] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. All equivalent changes and modifications made in accordance with the content of the present invention should be within the technical scope of the present invention.

Claims

1. A tool for hoisting a through bolt together with an upper positioning block and a nut, the upper positioning block being sleeved on an upper portion of the through bolt, and the nut being screwed on the through bolt above the upper positioning block, characterized in that: The tool is connected to the upper positioning block, comprising an upper side plate, a lower side plate, a connecting rod and a fixing bolt; the lower side plate is horizontally fixed to the upper surface of the upper positioning block by the fixing bolt, the upper side plate is horizontally placed on the upper surface of the nut, the upper end of the connecting rod is fixed to the upper side plate and the lower end is fixed to the lower side plate; ​ When the through bolt is lifted, the upper positioning block is connected to the nut by the tool, the nut is connected to the through bolt by thread, so that the upper positioning block and the nut become a whole and are lifted together with the through bolt.

2. The tooling for hoisting the upper locating block and the nut together with the penetrating bolt according to claim 1, characterized in that: The upper side plate is a "U" shaped plate, the inner distance of the slot is greater than the outer diameter of the through bolt and less than the outer diameter of the nut, so as to be placed on the upper surface of the nut.

3. The tooling for hoisting the upper locating block and the nut together with the penetrating bolt according to claim 1, characterized in that: The lower side plate is a "U" shaped plate, the inner distance of the slot is greater than the outer diameter of the through bolt and less than the outer diameter of the upper positioning block, so as to be fixed to the upper surface of the upper positioning block.

4. The tooling for hoisting the upper locating block and the nut together with the penetrating bolt according to claim 1, characterized in that: The upper surface of the upper positioning block is provided with a threaded hole, and the lower side plate is provided with a connecting through hole for the fixing bolt, the position of the connecting through hole corresponds to the position of the threaded hole.

5. The tooling for hoisting the upper locating block and the nut together with the penetrating bolt according to claim 4, characterized in that: The size and shape of the upper side plate are the same as those of the lower side plate, and the connecting through hole is also provided, so as to be used with the lower side plate and realize the up-down conversion of the tool.

6. The tooling for hoisting the upper locating block and the nut together with the penetrating bolt according to claim 1, characterized in that: The upper side plate and the lower side plate are made of steel plate, the connecting rod is made of round steel and is welded to the upper side plate and the lower side plate at the upper end and the lower end respectively.

7. The tooling for hoisting the upper locating block and the nut together with the penetrating bolt according to claim 1, characterized in that: The length of the connecting rod is greater than the height of the nut.

8. The tooling for hoisting the upper locating block and the nut together with the penetrating bolt according to claim 1, characterized in that: The number of the connecting rod is four.

9. A method for hoisting a through bolt together with an upper locating block and a nut by using the tooling of claim 1, characterized in that: The lower side plate of the tool is fixed to the upper surface of the upper positioning block by the fixing bolt, and the upper side plate is placed on the upper surface of the nut, so that the upper positioning block and the nut are lifted together when the through bolt is lifted.

10. The method of hoisting a through bolt with an upper locator block and a nut according to claim 9, wherein: The method comprises the following specific steps: 1) placing the lower side plate on the upper surface of the upper positioning block, so that the nut is located between the upper side plate and the lower side plate of the tool; 2) using the fixing bolt to pass through the connecting through hole of the lower side plate and being screwed into the threaded hole of the upper positioning block, so as to fix the tool to the upper positioning block; 3) screwing the nut upwards until the upper surface of the nut touches the lower surface of the upper side plate, so that the tool is placed on the nut and the upper positioning block is connected to the nut; 4) lifting the through bolt, the through bolt drives the nut by thread, the nut drives the upper positioning block by the tool, so that the upper positioning block and the nut become a whole and are lifted together with the through bolt.

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