Disassembling and assembling tool for engine cylinder sleeve

By designing a screw rod with threads and replaceable compression blocks, the problem that existing tools cannot adapt to cylinder liners of different sizes is solved, and a more efficient and safer disassembly and assembly process is achieved. And extend the service life of the tool.

CN222511759UActive Publication Date: 2025-02-21WEICHAI POWER CO LTD
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Patent Information

Application Number
CN202421220460.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-30
Publication Date
2025-02-21
Estimated Expiration
2034-05-30

AI Technical Summary

Technical Problem

Existing engine cylinder liner disassembly and assembly tools cannot meet the requirements of cylinder liner disassembly and assembly of different types and specifications, and it is easy to damage the inner holes of the cylinder liner, and the structure is complex and costly.

Method used

A engine cylinder line disassembly and assembly tool with threaded spiral rods, pressing blocks, pressing blocks and supporting blocks is designed. The cylinder liner disassembly and assembly structure is adopted, and the pressing blocks can be replaced as needed to adapt to cylinders of different sizes. set.

Benefits of technology

This tool can effectively reduce friction during disassembly and assembly, prevent iron filings from falling into the body, shorten working hours, extend tool life, and easily adapt to the disassembly and assembly requirements of different types and specifications of cylinder liner.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a disassembling and assembling tool for an engine cylinder sleeve. The disassembling and assembling tool comprises a screw rod with threads, a pressing block, a pressing block and a supporting block. A threaded hole matched with the screw rod is formed in the middle of the supporting block, and the top end of the screw rod is screwed into the threaded hole and penetrates through the supporting block. A groove is formed in one end of the pressing block, a connecting block is arranged at the bottom end of the screw rod and inserted into the groove of the pressing block, a clamping groove is formed in the pressing block, and the other end of the pressing block is matched with the clamping groove in the pressing block and can be inserted into the clamping groove. The pressing block can be replaced according to needs, the requirement for dismounting and mounting engine cylinder sleeves of different types and specifications is met, meanwhile, the cylinder sleeve dismounting and mounting integrated structure is adopted, the cylinder sleeve dismounting and mounting task can be independently completed, resources are reasonably utilized, cost is saved, and dismounting and mounting working hours can be effectively shortened.
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Description

Technical Field

[0001] The utility model relates to the technical field of engine maintenance, installation and disassembly, in particular to an engine cylinder sleeve disassembly and assembly tool. Background Art

[0002] The engine cylinder liner is an important part of the engine. During operation, it cooperates with the piston, piston ring, etc., and withstands high-temperature and high-pressure combustion gases, as well as the friction between the piston and the piston ring. Therefore, the engine cylinder liner will suffer varying degrees of damage such as wear, deformation, and cracks during use. These damages will affect the performance and service life of the engine. In order to repair or replace the engine cylinder liner, technicians in this field need to remove it from the engine block, which is a complicated and time-consuming task. Traditional tooling uses two tools to cooperate with each other, and the steps are cumbersome and time-consuming.

[0003] At present, the commonly used engine cylinder liner disassembly and assembly tools in the prior art are as follows:

[0004] Pull-nip type disassembly and assembly tool: This tool consists of a pull-nip, a pull rod, a pull plate, a nut, etc. The pull-nip is passed through the inner hole of the cylinder liner and fixed on the pull plate, and then the nut is tightened to make the pull plate lift the cylinder liner upward. The advantages of this tool are simple structure and easy operation, but the disadvantages are that it cannot adapt to cylinder liners of different diameters and lengths, and it is easy to cause damage to the inner hole of the cylinder liner.

[0005] Hydraulic disassembly tool: This tool consists of a hydraulic pump, hydraulic cylinder, hydraulic oil pipe, disassembly chuck, etc. The disassembly chuck is inserted into the inner hole of the cylinder sleeve and opened, and then the hydraulic pump provides pressure to the hydraulic cylinder, so that the hydraulic cylinder pushes the disassembly chuck to lift the cylinder sleeve upward. The advantage of this tool is that it will not damage the inner hole of the cylinder sleeve, but the disadvantage is that the structure is complex, the operation is inconvenient, and the cost is high.

[0006] Magnetic disassembly and assembly tool: This tool consists of a magnet, a pole piece, a connecting rod, a handle, etc. The magnet is placed on the outer surface of the cylinder liner and adsorbed on it, and then the connecting rod is rotated by the handle to make the pole piece lift the cylinder liner upward. The advantages of this tool are simple structure, easy operation, and no damage to the inner and outer surfaces of the cylinder liner. However, the disadvantages are that it can only be used for iron or high-iron cylinder liners, and the magnetic force is greatly affected by temperature.

[0007] In summary, the engine cylinder liner disassembly and assembly tools in the prior art cannot meet the needs of disassembly and assembly of engine cylinder liners of different types and specifications, and are prone to damage to the inner hole of the cylinder liner and complex structure and high cost. In addition, the tools in the prior art are suitable for cylinder liners of different sizes, and the bottom adopts a flap structure fixed by bolts. In order to ensure the versatility of the tool, the structural strength of the connection is sacrificed. After a long period of operation, the engine will have varying degrees of wear and deformation inside, and the cylinder liner and the body are tightly matched at this time. For a faulty engine, internal rust will make the cylinder liner more difficult to disassemble. In this situation, the split structure of the disassembly tool is prone to deformation, which affects the life of the tool. Utility Model Content

[0008] In view of the deficiencies in the prior art, the utility model provides an engine cylinder liner disassembly and assembly tool, which adopts a cylinder liner disassembly and assembly integrated structure and can replace the clamping block as needed to meet the needs of disassembly and assembly of engine cylinder liners of different types and specifications.

[0009] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0010] An engine cylinder liner disassembly and assembly tool comprises: a screw rod with threads, a pressure block, a clamping block and a support block; a threaded hole matching the screw rod is provided in the middle of the support block, and the top end of the screw rod is screwed into the threaded hole and penetrates the support block;

[0011] One end of the pressing block is provided with a groove, the bottom end of the spiral rod is provided with a connecting block, the connecting block is inserted into the groove of the pressing block, the pressing block is provided with a slot, the other end of the pressing block matches the slot on the pressing block and can be inserted into the slot.

[0012] As a further technical solution, a screw end is provided at one end of the screw rod that is screwed into the threaded hole, and the screw rod is driven to move up and down by rotating the screw end.

[0013] As a further technical solution, two ends of the support block are provided with slide grooves, a support rod is arranged through the slide groove, and the top end of the support rod is fixed to the slide groove by a nut.

[0014] As a further technical solution, the disassembly and assembly tool also includes a pressing sleeve, a threaded hole is provided on the surface of the pressing sleeve, the spiral rod passes through the pressing sleeve, and the pressing sleeve is tightened to fasten the bottom end of the spiral rod to the pressing block.

[0015] As a further technical solution, a first pin hole is provided on the slot of the clamping block, and a second pin hole matching the first pin hole is provided on one end of the clamping block inserted into the slot. When the clamping block is inserted into the slot, the first pin hole and the second pin hole are connected.

[0016] As a further technical solution, the first pin hole and the second pin hole are equipped with a pin shaft, and the pin shaft passes through the first pin hole and the second pin hole to fasten the pressure block and the clamping block.

[0017] As a further technical solution, a retaining ring is sleeved on the connecting block, and a bearing assembly is sleeved on the outer side of the retaining ring. The connecting block, the retaining ring and the bearing assembly are inserted into the groove of the pressing block together.

[0018] As a further technical solution, the connecting block is provided with a third pin hole, the retaining ring is provided with a fourth pin hole, the third pin hole and the fourth pin hole match each other, and when the retaining ring is sleeved on the connecting block, the third pin hole and the fourth pin hole are connected.

[0019] As a further technical solution, the third pin hole and the fourth pin hole are equipped with a cylindrical pin, and the cylindrical pin passes through the third pin hole and the fourth pin hole.

[0020] As a further technical solution, the screw rod with threads is a trapezoidal thread screw rod.

[0021] One or more technical solutions of the utility model have the following beneficial effects:

[0022] 1. The bidirectional thrust bearing structure at the bottom of the tooling of the utility model can effectively reduce the friction generated by the tooling during use, prevent iron filings generated by friction from falling into the machine body, and make the entire disassembly and assembly process more time-saving and labor-saving.

[0023] 2. The threaded screw rod in the utility model is a trapezoidal threaded screw rod, which can effectively reduce the working hours of disassembling and assembling the cylinder liner. The trapezoidal thread is stronger than the general thread. When the cylinder liner is difficult to disassemble, it can effectively prevent the thread from being damaged and extend the tool life.

[0024] 3. The utility model adopts an integrated structure for disassembly and assembly of the cylinder liner. Compared with the traditional two-piece tool of disassembly tool and installation tool, the tool of the utility model can independently complete the disassembly and assembly tasks of the cylinder liner, and can replace the clamping blocks of different sizes as needed to meet the needs of disassembly and assembly of engine cylinder liners of different types and specifications, and it is more convenient for technical personnel to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative 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.

[0026] Figure 1 This is a schematic diagram of the overall structure of the disassembly and assembly tool of the utility model;

[0027] Figure 2This is a schematic diagram of the partial disassembly structure of the disassembly and assembly tool of the utility model;

[0028] Figure 3 This is the assembly method when the disassembly tool of the utility model is used to disassemble the cylinder liner;

[0029] Figure 4 This is a schematic diagram of the structure of the utility model disassembly and assembly tool before the cylinder liner is installed;

[0030] Figure 5 This is the assembly method when the disassembly and assembly tool of the utility model is installed on the cylinder sleeve;

[0031] Figure 6 It is a schematic diagram of the structure of the bidirectional thrust bearing inside the disassembly and assembly tool of the utility model;

[0032] Among them: 1. nut; 2. support block; 3. support rod; 4. spiral rod with thread; 5. pressing sleeve; 6. pressing block; 7. clamping block; 8. pin shaft; 9. retaining ring; 10. cylindrical pin; 11. bearing assembly. DETAILED DESCRIPTION

[0033] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0034] Explanation of relevant terms:

[0035] Cylinder liner: The cylinder liner is a cylindrical engine component. It is installed in the cylinder block hole of the engine and is fixed on the top by the cylinder head. Together with the cylinder head and the piston, it constitutes the working space of the cylinder, which is the place where the mixture is burned and the air is compressed.

[0036] Embodiment 1

[0037] like Figure 1 As shown, the utility model provides an engine cylinder liner disassembly and assembly tool, including: a screw rod 4 with a thread, a pressure block 6, a clamping block 7 and a support block 2, wherein a threaded hole matching the screw rod 4 is provided in the middle position of the support block 2, the top end of the screw rod 4 is screwed into the threaded hole and penetrates the support block 2, and one end of the screw rod 4 screwed into the threaded hole is provided with a screw end head, and the screw rod is driven to move up and down by rotating the screw end head. In this embodiment, the screw rod 4 with a thread selects a trapezoidal thread screw rod, and the use of a trapezoidal thread structure can effectively reduce the working hours of cylinder liner disassembly and assembly, and the trapezoidal thread is stronger than the general thread. In the case of a cylinder liner that is difficult to disassemble, it can effectively prevent damage to the thread and extend the tool life.

[0038] Slide grooves are provided at both ends of the support block 2, and support rods 3 are provided through the slide grooves. The support rods 3 can move in the slide grooves. During use, the bolt holes on the engine body are firstly determined as the positions according to the engine body model, and then the spacing of the support rods 3 is adjusted, and the support rods 3 are connected to the bolt holes on the engine body. Finally, the top end of the support rods 3 is fixed to the slide groove by a nut 1.

[0039] like Figure 2 As shown, one end of the pressing block 6 is provided with a groove, and the bottom end of the spiral rod 4 is provided with a connecting block, which can be inserted into the groove of the pressing block, and a card slot is provided on the pressing block 7, and the other end of the pressing block 6 matches the card slot on the pressing block 7 and can be inserted into the card slot; and the disassembly and assembly tool in this embodiment also includes a pressing sleeve 5, the surface of which is provided with a threaded hole, and the spiral rod 4 can pass through the pressing sleeve, and the pressing sleeve is tightened to fasten the bottom end of the spiral rod 4 to the pressing block 6. The bidirectional thrust bearing is fixed by the provided pressing sleeve to reduce friction during use.

[0040] In this embodiment, if Figure 2 As shown, the clamping block 7 is provided with a first pin hole on the card slot, and the end of the clamping block inserted into the card slot is provided with a second pin hole matching the first pin hole. When inserted into the card slot, the first pin hole and the second pin hole are connected, and the first pin hole and the second pin hole are matched with a pin shaft 8, which passes through the first pin hole and the second pin hole to fasten the clamping block 6 and the clamping block 7. The clamping block is provided with two second pin holes, which are distributed up and down. When disassembling, the pin shaft 8 passes through the lower second pin hole, and when installing, the pin shaft passes through the upper second pin hole.

[0041] In this embodiment, if Figure 2 As shown, a retaining ring 9 is sleeved on the connection block, and a bearing assembly 11 is sleeved on the outer side of the retaining ring. The connection block, the retaining ring 9 and the bearing assembly 11 are inserted into the groove of the pressing block together. In addition, a third pin hole is provided on the connection block, and a fourth pin hole is provided on the retaining ring 9. The third pin hole and the fourth pin hole match each other. When the retaining ring 9 is sleeved on the connection block, the third pin hole and the fourth pin hole are connected. The third pin hole and the fourth pin hole are matched with a cylindrical pin 10, and the cylindrical pin 10 passes through the third pin hole and the fourth pin hole.

[0042] The specific method of using the engine cylinder liner disassembly and assembly tool provided by the utility model is:

[0043] 1. Disassembly of cylinder liner:

[0044] When removing the cylinder liner, Figure 3 As shown, first connect the support rod 3 to the bolt hole on the engine body, and then assemble the screw rod 4 with thread, the pressing sleeve 5, the pressing sleeve 6, the pressing block 7, and the pin 8 according to Figure 3After assembly, hold the screw rod 4 with one hand and the clamping block 7 with the other hand to insert the tooling into the cylinder liner, and fix the guide part around the support block 7 to the bottom of the cylinder liner. Next, use the support block 2 and the nut 1 to connect the support rod 3, and the threaded hole in the middle of the support block 2 to the screw rod 4. Finally, use a wrench to rotate the screw end on the screw rod 4, slowly remove the cylinder liner from the body, and complete the disassembly of the cylinder liner.

[0045] 2. Cylinder liner installation:

[0046] Before installing the cylinder liner, Figure 4 As shown, the pressing block 7 is turned over and the pin 8 and the pressing block 6 are aligned. Figure 4 After the cylinder sleeve is placed, install it, such as Figure 5 As shown, the clamping block 7 is placed on the top of the cylinder liner, and then the support rod 3, the support block 2 and the screw rod 4 are connected in the same way as when the cylinder liner is disassembled. A wrench is used to tighten the screw end on the screw rod 4, and the cylinder liner is slowly pressed into the body.

[0047] In this embodiment, the spiral rod 4, the pressing sleeve 5, the pressing block 6, the pressing block 7, the pin 8, the retaining ring 9, the cylindrical pin 10 and the bearing assembly 11 constitute the bidirectional thrust bearing structure inside the cylinder liner disassembly and assembly tool. When disassembling the cylinder liner, the spiral rod 4 will drive the retaining ring 9 at the bottom to rotate together through the cylindrical pin 10, and the retaining ring 9 acts on the thrust bearing to realize the transmission of force. When installing the cylinder liner, the spiral rod 4 directly acts on the thrust bearing to jointly realize the installation function of the cylinder liner disassembly and assembly tool. The internal bidirectional thrust bearing can effectively reduce the direct friction between metal parts, and can prevent iron filings generated by friction from falling into the engine body while saving effort, thereby affecting the life of the engine.

[0048] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An engine cylinder liner disassembly and assembly tool, characterized in that: include: A screw rod with threads, a pressure block, a clamping block and a support block; a threaded hole matching the screw rod is provided in the middle of the support block, and the top end of the screw rod is screwed into the threaded hole and passes through the support block; One end of the pressing block is provided with a groove, the bottom end of the spiral rod is provided with a connecting block, the connecting block is inserted into the groove of the pressing block, the pressing block is provided with a slot, the other end of the pressing block matches the slot on the pressing block and can be inserted into the slot.

2. An engine cylinder liner disassembly and assembly tool as claimed in claim 1, characterized in that: One end of the spiral rod screwed into the threaded hole is provided with a screw end head, and the spiral rod is driven to move up and down by rotating the screw end head.

3. The engine cylinder liner disassembly and assembly tool according to claim 1, characterized in that: Slide grooves are arranged at both ends of the support block, and support rods are arranged through the slide grooves. The top ends of the support rods are fixed on the slide grooves through nuts.

4. The engine cylinder liner disassembly and assembly tool according to claim 1, characterized in that: The disassembly and assembly tool also includes a pressing sleeve, a threaded hole is provided on the surface of the pressing sleeve, the spiral rod passes through the pressing sleeve, and the pressing sleeve is tightened to fasten the bottom end of the spiral rod to the pressing block.

5. The engine cylinder liner disassembly and assembly tool according to claim 1, characterized in that: The clamping slot of the clamping block is provided with a first pin hole, and one end of the clamping block inserted into the clamping slot is provided with a second pin hole matching the first pin hole. When the clamping block is inserted into the clamping slot, the first pin hole and the second pin hole are connected.

6. An engine cylinder liner disassembly and assembly tool as claimed in claim 5, characterized in that: The first pin hole and the second pin hole are matched with a pin shaft, and the pin shaft passes through the first pin hole and the second pin hole to fasten the pressing block and the clamping block.

7. The engine cylinder liner disassembly and assembly tool according to claim 1, characterized in that: A retaining ring is sleeved on the connecting block, and a bearing assembly is sleeved on the outer side of the retaining ring. The connecting block, the retaining ring and the bearing assembly are inserted into the groove of the pressing block together.

8. An engine cylinder liner disassembly and assembly tool as claimed in claim 7, characterized in that: The connecting block is provided with a third pin hole, the retaining ring is provided with a fourth pin hole, the third pin hole matches the fourth pin hole, and when the retaining ring is sleeved on the connecting block, the third pin hole and the fourth pin hole are connected.

9. An engine cylinder liner disassembly and assembly tool as claimed in claim 8, characterized in that: The third pin hole and the fourth pin hole are matched with cylindrical pins, and the cylindrical pins pass through the third pin hole and the fourth pin hole.

10. The engine cylinder liner disassembly and assembly tool according to claim 1, characterized in that: The screw rod with threads is a trapezoidal screw rod.