Self-locking lifting device for large-bore diesel engine cylinder liner

Abstract

This utility model discloses a self-locking lifting tool for cylinder liners of large-diameter diesel engines, belonging to the field of lifting tool technology. It solves the problems of cumbersome and inefficient operation of existing lifting tools for cylinder liners. The self-locking lifting tool for large-diameter diesel engine cylinder liners includes a lifting rod with a limiting block at its bottom. A fixing sleeve is fitted onto the lifting rod and fixedly connected to the limiting block. A sliding sleeve is slidably fitted onto the lifting rod above the fixing sleeve. The fixing sleeve and the sliding sleeve have the same external structure. Multiple lifting arms are hinged to the sliding sleeve. Each lifting arm includes a first connecting arm and a second connecting arm. The first connecting arm is connected to the second connecting arm and tilts inward. The first connecting arm is hinged to the sliding sleeve. A connecting rod is hinged between the second connecting arm and the fixing sleeve. This self-locking lifting tool for large-diameter diesel engine cylinder liners effectively improves work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of lifting equipment technology, and more specifically, it relates to a self-locking lifting equipment for cylinder liners of large-diameter diesel engines. Background Technology

[0002] The power and safety of a diesel engine are key factors in ensuring its normal operation and extending its service life. However, the combustion chamber structure, including the cylinder liner, is an important component that directly determines the power performance of a diesel engine. The cylinder liner is a thin-walled cylindrical part, and its machining requires high dimensional accuracy, geometric tolerance and surface roughness. It requires multiple processes to complete the machining, and it needs to be handled multiple times during the machining and assembly process.

[0003] A low-speed diesel engine fully rigid cylinder liner lifter with publication number CN211444680U was found. It consists of a crossbeam, a lifting rod, modules, and bolts. The crossbeam and the upper part of the lifting rod are connected by bolts. The lower part of the lifting rod has a shaft hole. The module has a flange and a stepped shaft. The flange has a threaded hole in the middle, and the stepped shaft has a threaded rod at its front end. The stepped shaft mates with the shaft hole, and the threaded rod at the front end of the stepped shaft connects to the threaded hole in the middle of the flange to form the module. Square flanges are welded to both ends of the crossbeam, and bolts pass through the connection holes of the square flanges to connect to the threaded holes on the upper part of the lifting rod. The crossbeam also has a series of lifting holes, effectively ensuring the quality of cylinder liner transportation and installation. However, this type of lifter relies on bolts to be fixed to the cylinder liner. During lifting, the lifter must first be connected to the cylinder liner with bolts, and after lowering the cylinder liner, the bolts must be removed before the lifter can detach from the cylinder liner. This operation is cumbersome and inefficient. Utility Model Content

[0004] The technical problem to be solved by this utility model is to address the above-mentioned shortcomings of the prior art by providing a self-locking lifting tool for large-diameter diesel engine cylinder liners. It is simple to operate, relies on the weight of the cylinder liner itself to achieve self-locking, has high safety, and effectively improves work efficiency.

[0005] The technical solution of this utility model is as follows: A self-locking hanger for a large-diameter diesel engine cylinder liner includes a lifting rod, a limiting block at the bottom of the lifting rod, a positioning structure at the bottom of the limiting block, a fixing sleeve on the lifting rod, and the fixing sleeve being fixedly connected to the limiting block, a sliding sleeve on the lifting rod above the fixing sleeve, the fixing sleeve and the sliding sleeve having the same external structure, multiple lifting arms hinged on the sliding sleeve, each lifting arm including a first connecting arm and a second connecting arm, the first connecting arm being connected to the second connecting arm and inclined inward, the first connecting arm being hinged to the sliding sleeve, a connecting rod hinged between the second connecting arm and the fixing sleeve, a locking block at the bottom of the second connecting arm, and a lifting ring at the top of the lifting rod.

[0006] As a further improvement, the outer wall surface of the sliding sleeve is provided with a plurality of first connecting blocks arranged at equal intervals, the first connecting blocks are provided with a first groove, and an mounting plate is provided on the inner side of one end of the first connecting arm, the mounting plate being hinged and installed in the first groove.

[0007] Furthermore, each of the second connecting blocks is provided with a second groove, and the inner side of the second connecting arm is provided with a third connecting block. The third connecting block is provided with a third groove, one end of the connecting rod is hinged and installed in the second groove, and the other end of the connecting rod is hinged and installed in the third groove.

[0008] Furthermore, the positioning structure includes a screw and a tapered positioning block. The screw passes through the limiting block and is threadedly connected to the lifting rod. The tapered positioning block is rotatably mounted on one end of the screw via a bearing.

[0009] Furthermore, the screw is provided with a protrusion, and the cross-section of the protrusion is hexagonal.

[0010] Furthermore, the conical positioning block is made of rubber.

[0011] Furthermore, the outer wall of the second connecting arm is provided with a handle.

[0012] Furthermore, rubber pads are provided on the surfaces of the second connecting arm and the snap-fit ​​block.

[0013] Beneficial effects

[0014] Compared with the prior art, this utility model has the following advantages:

[0015] 1. This utility model relates to a self-locking lifting tool for large-diameter diesel engine cylinder liners. The lifting tool achieves self-locking by utilizing the weight of the cylinder liner itself, thereby lifting the cylinder liner. This self-locking lifting tool is simple to operate, relies on the weight of the cylinder liner itself to achieve self-locking, has high safety, and effectively improves work efficiency.

[0016] 2. The present invention relates to a self-locking lifting tool for cylinder liners of large-diameter diesel engines, wherein the lifting arm and the sliding sleeve, as well as the connecting rod and the fixing sleeve, are detachably connected, making it easy to carry and convenient for maintenance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of the present invention in use;

[0018] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 3 This is a schematic diagram of the main structure of the boom in this utility model;

[0020] Figure 4This is a schematic diagram of the main structure of the suspension rod in this utility model;

[0021] Figure 5 This is a top view of the fixed sleeve in this utility model;

[0022] Figure 6 This is a top view of the sliding sleeve in this utility model.

[0023] Figure 7 This is a top view cross-sectional structural diagram of the third connecting block in this utility model.

[0024] Wherein: 1-Hanging rod, 2-Limiting block, 3-Fixing sleeve, 4-Screw, 5-Sliding sleeve, 6-Hanging arm, 7-First connecting block, 8-First groove, 9-Second connecting block, 10-Second groove, 11-Third connecting block, 12-Third groove, 13-Mounting plate, 14-Connecting rod, 15-Conical positioning block, 16-Protrusion, 17-Cylinder liner, 18-Snap-fit ​​block, 19-Rubber pad, 20-Handle, 21-Hanging ring, 61-First connecting arm, 62-Second connecting arm. Detailed Implementation

[0025] The present invention will be further described below with reference to specific embodiments shown in the accompanying drawings.

[0026] See Figure 1-7 A self-locking lifting device for a large-bore diesel engine cylinder liner includes a lifting rod 1, a limiting block 2 at the bottom of the lifting rod 1, a positioning structure at the bottom of the limiting block 2, a fixing sleeve 3 fitted on the lifting rod 1, and the fixing sleeve 3 being fixedly connected to the limiting block 2. A sliding sleeve 5 is slidably fitted on the lifting rod 1 above the fixing sleeve 3. The fixing sleeve 3 and the sliding sleeve 5 have the same external structure. Multiple lifting arms 6 are hinged on the sliding sleeve 5. The lifting arms 6 include a first connecting arm 61 and a second connecting arm 62. The first connecting arm 61 is connected to the second connecting arm 62, and the first connecting arm 61 is inclined inward. The first connecting arm 61 is hinged to the sliding sleeve 5. A connecting rod 14 is hinged between the second connecting arm 62 and the fixing sleeve 3. A locking block 18 is provided at the bottom of the second connecting arm 62. A lifting ring 21 is provided at the top of the lifting rod 1. The self-locking lifting device is connected to a crane or other lifting equipment through the lifting ring 21, thereby lifting the cylinder liner by the crane or other lifting equipment.

[0027] In use, the operator first pulls the multiple booms 6 outward to open them. After the booms 6 are open, the locking block 18 is placed below the outer circular step of the cylinder liner 17. The lifting ring 21 is connected to the crane. The crane pulls the boom 1 upward, and at this time, the fixed sleeve 3 moves upward relative to the sliding sleeve 5, which drives the hinged connecting rod 14 to retract. When the locking block 18 at the bottom of the boom 6 locks the outer circular step of the cylinder liner, the cylinder liner 17 completes the self-locking of the lifting device through its own weight, thus achieving the purpose of lifting the cylinder liner 17. This self-locking lifting device is simple to operate, relies on the weight of the cylinder liner 17 to complete the self-locking, has high safety, and effectively improves work efficiency.

[0028] In this embodiment, the outer wall of the sliding sleeve 5 is provided with a plurality of first connecting blocks 7 arranged at equal intervals. The first connecting block 7 is provided with a first groove 8. The inner side of one end of the first connecting arm 61 is provided with a mounting plate 13. The mounting plate 13 is hinged in the first groove 8 and is hinged in the first groove 8 by bolt connection.

[0029] In this embodiment, the outer wall of the fixing sleeve 3 is provided with a plurality of second connecting blocks 9 arranged at equal intervals, each of the second connecting blocks 9 being provided with a second groove 10. The inner side of the second connecting arm 62 is provided with a third connecting block 11, the third connecting block 11 being provided with a third groove 12. One end of the connecting rod 14 is hinged to the second groove 10, and the other end of the connecting rod 14 is hinged to the third groove 12. The two ends of the connecting rod 14 are connected by bolts and respectively hinged to the second groove 10 and the third groove 12. When it is necessary to lift the cylinder liner... At 17:00, after the boom 6 is extended, the locking block 18 is placed below the outer circular step of the cylinder liner 17. The crane is connected to the lifting ring 21 and raised. At this time, the fixed sleeve 3 moves upward relative to the sliding sleeve 5. The fixed sleeve 3 drives each boom 6 to retract inward through the connecting rod 14 hinged to it until the locking block 18 is locked below the outer circular step of the cylinder liner 17, thus completing the locking of the locking block 18. At the same time, the side of the locking block 18 is in close contact with the outer wall surface of the cylinder liner 17, which can further improve the overall structural strength of the self-locking lifting device.

[0030] In this embodiment, the positioning structure includes a screw 4 and a tapered positioning block 15. The screw 4 passes through the limiting block 2 and is threadedly connected to the lifting rod 1. The tapered positioning block 15 is rotatably mounted on one end of the screw 4 via a bearing. The axis of the screw 4, the tapered positioning block 15, and the lifting rod 1 are all on the same straight line. Before lifting, multiple lifting arms 6 are opened. After the lifting arms 6 are opened, the snap-fit ​​block 18 is placed below the outer circular step of the cylinder liner. At the same time, the tapered positioning block 15 is positioned above the cylinder liner 17. Then, the screw 4 is rotated to move the tapered positioning block 15 downward. The tapered positioning block 15 is inserted into the corresponding hole of the cylinder liner 17, and the tapered positioning block 15 and the corresponding hole of the cylinder liner 17 are aligned. When the lifting arm 6 clamps the cylinder liner 17 through the snap-fit ​​block 18, the center of gravity of the lifting rod 1 and the cylinder liner 17 are on the same straight line, ensuring stability during the lifting process and facilitating the clamping of the cylinder liner 17 by the lifting arm 6 through the snap-fit ​​block 18.

[0031] In this embodiment, the screw 4 is provided with a protrusion 16, the cross section of which is hexagonal, so that the operator can easily turn the screw 4 through the protrusion 16.

[0032] In this embodiment, the conical positioning block 15 is made of rubber. When the conical positioning block 15 is inserted into the corresponding hole of the cylinder liner 17, the hardness of the rubber-made conical positioning block 15 is lower than that of the cylinder liner 17, and it will not cause damage to the cylinder liner 17.

[0033] In this embodiment, the outer wall of the second connecting arm 62 is provided with a handle 20, which makes it easier for workers to pull open the boom 6 and improve work efficiency.

[0034] In this embodiment, rubber pads 19 are provided on the surfaces of the second connecting arm 62 and the snap-fit ​​block 18. Rubber pads 19 are installed on the surfaces of the snap-fit ​​block 18 and the second lifting arm 62 that contact the cylinder liner 17. The rubber pads 19 play a role in buffering and protection. When the cylinder liner 17 is lifted, the snap-fit ​​block 18 and the second lifting arm 62 are pressed against the surface of the cylinder liner 17. The rubber pads 19 can prevent damage to the cylinder liner 17 during the lifting process.

[0035] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present utility model. These modifications and improvements will not affect the effectiveness of the present utility model or the practicality of the patent.

Claims

1. A large-bore diesel engine cylinder liner self-locking lifting device, characterized in that, Includes a boom (1), the bottom of which is provided with a limiting block (2), the bottom of which is provided with a positioning structure, a fixing sleeve (3) is fitted on the boom (1), and the fixing sleeve (3) is fixedly connected to the limiting block (2), a sliding sleeve (5) is slidably fitted on the boom (1) above the fixing sleeve (3), the fixing sleeve (3) and the sliding sleeve (5) have the same external structure, and multiple booms (6) are hinged on the sliding sleeve (5), the booms (6) The device includes a first connecting arm (61) and a second connecting arm (62). The first connecting arm (61) is connected to the second connecting arm (62), and the first connecting arm (61) is inclined inward. The first connecting arm (61) is hinged to the sliding sleeve (5). The second connecting arm (62) is hinged to the fixed sleeve (3) with a connecting rod (14). The bottom of the second connecting arm (62) is provided with a snap block (18), and the top of the lifting rod (1) is provided with a lifting ring (21).

2. A large-bore diesel engine cylinder liner self-locking lifting device according to claim 1, characterized in that, The outer wall of the sliding sleeve (5) is provided with a plurality of first connecting blocks (7) arranged at equal intervals. The first connecting block (7) is provided with a first groove (8). The inner side of one end of the first connecting arm (61) is provided with a mounting plate (13). The mounting plate (13) is hinged in the first groove (8).

3. A large-bore diesel engine cylinder liner self-locking lifting device according to claim 1, characterized in that, The outer wall of the fixed sleeve (3) is provided with a plurality of second connecting blocks (9) arranged at equal intervals. Each of the second connecting blocks (9) is provided with a second groove (10). The inner side of the second connecting arm (62) is provided with a third connecting block (11). The third connecting block (11) is provided with a third groove (12). One end of the connecting rod (14) is hinged in the second groove (10), and the other end of the connecting rod (14) is hinged in the third groove (12).

4. The self-locking lifting tool for a large-bore diesel engine cylinder liner according to claim 1, characterized in that, The positioning structure includes a screw (4) and a tapered positioning block (15). The screw (4) passes through the limiting block (2) and is threadedly connected to the lifting rod (1). The tapered positioning block (15) is rotatably mounted on one end of the screw (4) through a bearing.

5. A large-bore diesel engine cylinder liner self-locking lifting device according to claim 4, characterized in that, The screw (4) is provided with a protrusion (16), and the cross section of the protrusion (16) is hexagonal.

6. A large bore diesel engine cylinder liner self-locking lifting device according to claim 4, characterized in that, The conical positioning block (15) is made of rubber.

7. A large-bore diesel engine cylinder liner self-locking lifting device according to claim 1, characterized in that, The outer wall of the second connecting arm (62) is provided with a handle (20).

8. A large bore diesel engine cylinder liner self-locking lifting device according to claim 1, characterized in that, Rubber pads (19) are provided on the surfaces of the second connecting arm (62) and the snap-fit ​​block (18).

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