Cylinder sleeve extractor

Abstract

The utility model relates to a cylinder sleeve extractor which comprises an extractor body and a hydraulic clamping jaw. The hydraulic clamping jaw is arranged outside the extractor body in a sleeving mode and comprises a liquid storage device, a hydraulic telescopic rod, a motor and a second piston, the motor is arranged at the bottom of the liquid storage device, and a threaded column extending into the liquid storage device is arranged at the position of an output shaft of the motor; a second piston in threaded connection with the threaded column is arranged in the liquid storage device, a hydraulic telescopic rod is arranged on the circumferential face of the liquid storage device, and the hydraulic telescopic rod communicates with the liquid storage device. Through the arrangement of the extractor main body, the hydraulic clamping jaw and other parts, the liquid storage device, the hydraulic telescopic rod, the motor, the second piston and the threaded column are matched, hydraulic oil is introduced into the bottom cylinder, and when the motor works to drive the threaded column to rotate, the second piston moves vertically, so that the hydraulic oil is extracted; and therefore, the effect of pressing the hydraulic oil into the hydraulic telescopic rod is achieved.

Description

Technical Field

[0001] This utility model relates to a cylinder liner extractor, specifically a cylinder liner extractor. Background Technology

[0002] Cylinder liner extractors, also known as pullers, are core tools used in mechanical manufacturing, equipment repair, and automotive maintenance to disassemble shaft parts, bearings, gears, and other interference-fit components. Their frequency of use and reliability directly affect equipment maintenance efficiency.

[0003] A cylinder liner is a cylindrical part placed in the cylinder bore of an automotive engine and secured by the cylinder head. Traditional cylinder liner pullers use a threaded support rod connected to a threaded hole on the cylinder block surface to support and fix the entire puller position. The clamps fit tightly against the inner wall of the cylinder liner, and an upward pulling force is applied to the clamps to remove the cylinder liner. Traditional cylinder liner pullers generally suffer from poor versatility; the same model of equipment is difficult to accommodate the disassembly needs of parts of different sizes and materials. Furthermore, commonly used mechanical clamps are prone to damage to the engine body during cylinder liner removal due to uneven force application, and they rely on manual operation, resulting in low efficiency. Therefore, a new cylinder liner puller is proposed to solve the aforementioned problems. Utility Model Content

[0004] Based on the above description, this utility model provides a cylinder liner extractor to solve the problems of poor versatility and easy damage to the machine body caused by uneven force when using existing pullers.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A cylinder liner extractor, comprising: an extractor body and hydraulic grippers;

[0006] The hydraulic gripper is sleeved on the outside of the extractor body and includes a reservoir, a hydraulic telescopic rod, a motor, and a second piston. The motor is located at the bottom of the reservoir, and a threaded post extending into the reservoir is located at the output shaft of the motor. The second piston, which is threadedly connected to the threaded post, is located inside the reservoir. A hydraulic telescopic rod is located on the circumferential surface of the reservoir and is in communication with the reservoir.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the extractor body includes a threaded vertical rod, a lever is provided on the circumferential surface of the threaded vertical rod, and a horizontal frame is sleeved on the outside. The horizontal frame is threadedly connected to the threaded vertical rod, and a threaded column is provided on the top of the horizontal frame that passes through and extends to the bottom of the horizontal frame.

[0009] Furthermore, the lower surface of the threaded vertical rod is provided with a first threaded blind hole, and the bottom end of the threaded vertical rod is provided with a shoulder screw that is threadedly connected to the first threaded blind hole.

[0010] Furthermore, the liquid reservoir includes a connector, the connector including a connecting cylinder, the upper surface of the connecting cylinder being provided with a connecting hole, and the shoulder of the shoulder screw passing through the connecting hole and extending into the interior of the connecting cylinder.

[0011] Furthermore, a partition is provided at the bottom of the connector, and a bottom cylinder is provided at the bottom of the partition.

[0012] Furthermore, the bottom cylinder includes a hollow cylinder body, the upper surface of which is provided with an annular groove, the interior of which is provided with a sealing ring, the sealing ring being in contact with the lower surface of the partition plate, a hollow rectangular cylinder being provided on the bottom wall inside the hollow cylinder body, and a side threaded hole communicating with the hollow cylinder body being provided on the circumferential surface of the hollow cylinder body.

[0013] Furthermore, a motor is provided at the bottom of the hollow cylinder, and a threaded post extending into the interior of the hollow rectangular cylinder is provided at the output shaft of the motor. A second piston is provided inside the hollow cylinder, located below the partition plate.

[0014] Furthermore, the second piston includes a piston block, the outer ring of which is tightly fitted to the inner wall of the hollow cylinder and located below the side threaded hole. A rectangular block is provided on the side of the piston block facing the motor, and a second threaded blind hole is provided on the surface of the rectangular block facing the motor. The threaded post extends into the interior of the second threaded blind hole and is threadedly connected to the second threaded blind hole.

[0015] Furthermore, the hydraulic telescopic rod includes a first telescopic rod, a second telescopic rod, and a third telescopic rod. The first telescopic rod, the second telescopic rod, and the third telescopic rod have the same internal structure, but different lengths.

[0016] Furthermore, the first telescopic rod includes a hollow cylinder, which is threadedly connected to the side threaded hole and communicates with the hollow cylinder body. A connecting cover is provided at the end of the hollow cylinder away from the liquid reservoir. An inner sealing ring is provided inside the connecting cover. A first piston is provided inside the hollow cylinder, which is in close contact with the inner wall of the hollow cylinder. A connecting rod is provided on the side of the first piston away from the liquid reservoir, which penetrates the connecting cover and extends outside the connecting cover. The connecting rod is in close contact with the inner ring of the inner sealing ring. A contact plate is provided at the end of the connecting rod away from the liquid reservoir.

[0017] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0018] 1. This utility model, by setting up an extractor body and hydraulic grippers and other components, through the cooperation between the reservoir, hydraulic telescopic rod, motor, second piston and threaded column, and by introducing hydraulic oil into the interior of the bottom cylinder, so that the hydraulic oil is located between the second piston and the partition plate, when the motor works and drives the threaded column to rotate, the second piston moves vertically under the action of thread transmission, thereby achieving the effect of pressing the hydraulic oil into the interior of the hydraulic telescopic rod, so that the hydraulic telescopic rod fits tightly against the inner wall of the cylinder liner;

[0019] 2. By setting up the hydraulic telescopic rod, the effect of easy replacement of the telescopic rod is achieved. Furthermore, by setting up hydraulic telescopic rods of different sizes, the extractor can be adapted to cylinder liners of different inner diameters. Attached Figure Description

[0020] Figure 1 A schematic diagram of the structure of a cylinder liner extractor provided in an embodiment of this utility model;

[0021] Figure 2 This is a schematic diagram of the hydraulic gripper structure in an embodiment of the present invention;

[0022] Figure 3 for Figure 2 Another perspective of the structural cross-section;

[0023] Figure 4 This is a schematic diagram of the extractor body in an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the threaded vertical rod in an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the connector structure in an embodiment of this utility model;

[0026] Figure 7 This is a schematic diagram of the bottom cylinder structure in an embodiment of the present utility model;

[0027] Figure 8 for Figure 7 Another perspective of the structural cross-section;

[0028] Figure 9 This is a schematic diagram of the hydraulic telescopic rod in an embodiment of this utility model;

[0029] Figure 10 This is a schematic diagram of the structure of the first telescopic rod in an embodiment of this utility model;

[0030] Figure 11 This is a schematic diagram of the structure of the second piston in an embodiment of the present invention;

[0031] The attached diagram lists the components represented by each number as follows:

[0032] 1. Extractor body; 11. Threaded vertical rod; 12. Horizontal frame; 13. Threaded column; 14. Actuating rod; 15. First threaded blind hole; 16. Shoulder screw; 2. Liquid reservoir; 21. Connecting piece; 211. Connecting cylinder; 212. Connecting hole; 22. Partition plate; 23. Bottom cylinder; 231. Hollow cylinder; 232. Side threaded hole; 233. Annular groove; 234. Hollow rectangular cylinder; 3. Hydraulic telescopic rod; 31. First telescopic rod; 32. Second telescopic rod; 33. Third telescopic rod; 34. Hollow cylinder; 35. Connecting cover; 36. First piston; 37. Connecting rod; 38. Contact plate; 39. Inner sealing ring; 4. Motor; 5. Second piston; 51. Piston block; 52. Rectangular block; 53. Second threaded blind hole; 6. Threaded column. Detailed Implementation

[0033] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be more thorough and complete.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application.

[0035] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0036] Please see Figure 1 A cylinder liner extractor includes: an extractor body 1 and hydraulic grippers;

[0037] The hydraulic gripper is sleeved on the outside of the extractor body 1 and includes a reservoir 2, a hydraulic telescopic rod 3, a motor 4, and a second piston 5. The bottom of the reservoir 2 is provided with a motor 4, preferably a servo motor. The output shaft of the motor 4 is provided with a threaded post 6 extending into the reservoir 2. The inside of the reservoir 2 is provided with a second piston 5 that is threadedly connected to the threaded post 6. The circumferential surface of the reservoir 2 is provided with a hydraulic telescopic rod 3, which is in communication with the reservoir 2.

[0038] like Figure 4 and Figure 5 As shown, the extractor body 1 includes a threaded vertical rod 11, a toggle lever 14 is provided on the circumferential surface of the threaded vertical rod 11, and a cross frame 12 is sleeved on the outside. The cross frame 12 is threadedly connected to the threaded vertical rod 11. A threaded column 13 is provided at the top of the cross frame 12, extending through and below the cross frame 12. A first threaded blind hole 15 is provided on the lower surface of the threaded vertical rod 11. A shoulder screw 16 is provided at the bottom end of the threaded vertical rod 11 and threadedly connected to the first threaded blind hole 15.

[0039] Based on the above, the crossbar 12 is fixed and supported by the threaded column 13 being threadedly connected to the threaded hole on the engine surface. By turning the lever 14, the threaded vertical rod 11 is rotated. The threaded vertical rod 11 cooperates with the first threaded blind hole 15, so that the threaded vertical rod 11 can move vertically, and then the cylinder liner is moved together by the hydraulic gripper.

[0040] like Figure 2 , Figure 3 as well as Figures 6-8 As shown, the liquid reservoir 2 includes a connector 21, the connector 21 includes a connecting cylinder 211, the upper surface of the connecting cylinder 211 is provided with a connecting hole 212, the shoulder of the shoulder screw 16 passes through the connecting hole 212 and extends into the interior of the connecting cylinder 211, the bottom of the connector 21 is provided with a partition 22, and the bottom of the partition 22 is provided with a bottom cylinder 23;

[0041] The bottom cylinder 23 includes a hollow cylinder 231. An annular groove 233 is provided on the upper surface of the hollow cylinder 231. A sealing ring is provided inside the annular groove 233. The sealing ring is in contact with the lower surface of the partition plate 22. A hollow rectangular cylinder 234 is provided on the bottom wall inside the hollow cylinder 231. A side threaded hole 232 communicating with the hollow cylinder 231 is provided on the circumferential surface of the hollow cylinder 231.

[0042] Based on the above, the connector 21 is sleeved on the shoulder of the shoulder screw 16, so that when the threaded vertical rod 11 rotates, it will not drive the connector 21 to rotate together. That is, the connector 21 and the threaded vertical rod 11 can generate relative movement. The partition 22 is set to separate the connector 21 and the bottom cylinder 23, and to form a liquid storage chamber between the bottom cylinder 23 and the partition 22. The liquid storage chamber can store hydraulic oil, and the hydraulic oil is located between the second piston 5 and the partition 22.

[0043] like Figure 3As shown, a motor 4 is provided at the bottom of the hollow cylinder 231. The motor 4 is preferably a small servo motor of model LKS210-21. A threaded post 6 extending into the hollow rectangular cylinder 234 is provided at the output shaft of the motor 4. A second piston 5 located below the partition plate 22 is provided inside the hollow cylinder 231.

[0044] like Figure 11 As shown, the second piston 5 includes a piston block 51. The outer ring of the piston block 51 is tightly fitted to the inner wall of the hollow cylinder 231 and is located below the side threaded hole 232. A rectangular block 52 is provided on the side of the piston block 51 facing the motor 4. A second threaded blind hole 53 is provided on the surface of the rectangular block 52 facing the motor 4. The threaded post 6 extends into the interior of the second threaded blind hole 53 and is threadedly connected to the second threaded blind hole 53.

[0045] Based on the above, when the motor 4 is energized and drives the threaded column 6 to rotate, since the threaded column 6 is threadedly connected to the second threaded blind hole 53, the second piston 5 can move vertically under the action of the threaded transmission. Furthermore, the rectangular block 52 and the hollow rectangular cylinder 234 sleeved outside the rectangular block 52 cooperate with each other, so that the second piston 5 cannot rotate on its own, that is, it can only move vertically along the direction of the hollow rectangular cylinder 234.

[0046] The vertical movement of the second piston 5 achieves the function of squeezing the hydraulic oil. When the second piston 5 moves upward, the hydraulic oil is squeezed into the interior of the hydraulic telescopic rod 3, causing the hydraulic telescopic rod 3 to extend. Conversely, when the second piston 5 moves downward, the hydraulic oil is drawn out from the interior of the hydraulic telescopic rod 3 and flows back into the interior of the hollow cylinder 231. At this time, the hydraulic telescopic rod 3 returns to its original position.

[0047] like Figure 2 , Figure 3 , Figure 9 as well as Figure 10 As shown, the hydraulic telescopic rod 3 includes a first telescopic rod 31, a second telescopic rod 32, and a third telescopic rod 33. The internal structures of the first telescopic rod 31, the second telescopic rod 32, and the third telescopic rod 33 are identical, but their lengths are different.

[0048] The first telescopic rod 31 includes a hollow cylinder 34, which is threadedly connected to the side threaded hole 232 and communicates with the hollow cylinder body 231. A connecting cover 35 is provided at the end of the hollow cylinder 34 away from the liquid reservoir 2. An inner sealing ring 39 is provided inside the connecting cover 35. A first piston 36 is provided inside the hollow cylinder 34 and is in close contact with the inner wall of the hollow cylinder 34. A connecting rod 37 is provided on the side of the first piston 36 away from the liquid reservoir 2, which penetrates the connecting cover 35 and extends outside the connecting cover 35. The connecting rod 37 is in close contact with the inner ring of the inner sealing ring 39. A contact plate 38 is provided at the end of the connecting rod 37 away from the liquid reservoir 2.

[0049] Based on the above, after the hydraulic oil is squeezed into the hollow cylinder 34 under the action of the second piston 5, the hydraulic oil pushes the first piston 36 to move away from the reservoir 2, that is, the overall length of the hydraulic telescopic rod 3 is extended. After the first piston 36 moves, it drives the connecting rod 37 and the contact plate 38 to move, so that the contact plate 38 can fit tightly with the inner surface of the cylinder liner, thereby achieving the effect of the hydraulic gripper clamping the cylinder liner. Conversely, when the second piston 5 moves downward, the hydraulic oil flows back from the inside of the hollow cylinder 34 to the inside of the hollow cylinder 231, causing the first piston 36 to reset. At this time, the hydraulic gripper separates from the inner wall of the cylinder liner.

[0050] With the provision of the first telescopic rod 31, the second telescopic rod 32, and the third telescopic rod 33, telescopic rods of different lengths can be used for cylinder liners with different inner diameters, thus enhancing versatility.

[0051] In this embodiment, a liquid reservoir 2, a hydraulic telescopic rod 3, a motor 4, a second piston 5, and a threaded column 6 are provided. The motor 4 drives the threaded column 6 to rotate, thereby causing the second piston 5 to move vertically under the action of threaded transmission. The motor 4 changes the rotation direction of the threaded column 6, so that the movement direction of the second piston 5 changes accordingly, that is, the second piston 5 can move upward or downward.

[0052] When the second piston 5 moves, it can squeeze hydraulic oil into the interior of the hydraulic telescopic rod 3, so that when the hydraulic gripper extends into the cylinder liner, it can clamp the interior of the cylinder liner, that is, the contact plate 38 is tightly attached to the inner wall of the cylinder liner. By driving the second piston 5 to move in the opposite direction, the hydraulic oil inside the hydraulic telescopic rod 3 can be extracted, so that the hydraulic telescopic rod 3 is reset, that is, the contact plate 38 is separated from the inner wall of the cylinder liner. By setting hydraulic telescopic rods 3 of different lengths, the hydraulic gripper can be used for cylinder liners of different inner diameters.

[0053] When the hydraulic gripper is tightly fitted to the inner wall of the cylinder liner, the threaded vertical rod 11 is rotated by rotating the actuating rod 14. At this time, the threaded vertical rod 11 moves vertically under the action of the threaded transmission between it and the crossbeam 12, thereby applying an upward pulling force to the cylinder liner and thus removing the cylinder liner.

[0054] This hydraulic clamp achieves uniform pressure application through hydraulic drive, avoiding localized stress damage to the mechanical grippers and improving disassembly reliability.

[0055] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cylinder liner extractor characterized by, include: Extractor body (1) and hydraulic grippers; The hydraulic gripper is sleeved on the outside of the extractor body (1) and includes a reservoir (2), a hydraulic telescopic rod (3), a motor (4), and a second piston (5). The bottom of the reservoir (2) is provided with a motor (4). The output shaft of the motor (4) is provided with a threaded post (6) extending into the reservoir (2). The inside of the reservoir (2) is provided with a second piston (5) that is threadedly connected to the threaded post (6). The circumferential surface of the reservoir (2) is provided with a hydraulic telescopic rod (3), and the hydraulic telescopic rod (3) is interconnected with the reservoir (2).

2. The cylinder liner extractor of claim 1, wherein, The extractor body (1) includes a threaded vertical rod (11), a lever (14) is provided on the circumferential surface of the threaded vertical rod (11), and a cross frame (12) is sleeved on the outside. The cross frame (12) is threadedly connected to the threaded vertical rod (11), and a threaded column (13) is provided on the top of the cross frame (12) and extends through and to the bottom of the cross frame (12).

3. The cylinder liner extractor of claim 2, wherein, The lower surface of the threaded vertical rod (11) is provided with a first threaded blind hole (15), and the bottom end of the threaded vertical rod (11) is provided with a shoulder screw (16) that is threadedly connected to the first threaded blind hole (15).

4. The cylinder liner extractor of claim 3, wherein, The reservoir (2) includes a connector (21), the connector (21) includes a connecting cylinder (211), the upper surface of the connecting cylinder (211) is provided with a connecting hole (212), and the shoulder of the shoulder screw (16) passes through the connecting hole (212) and extends into the interior of the connecting cylinder (211).

5. The cylinder liner extractor of claim 4, wherein, The bottom of the connector (21) is provided with a partition (22), and the bottom of the partition (22) is provided with a bottom cylinder (23).

6. The cylinder liner extractor of claim 5, wherein, The bottom cylinder (23) includes a hollow cylinder (231), the upper surface of which is provided with an annular groove (233), the inside of which is provided with a sealing ring, the sealing ring being in contact with the lower surface of the partition (22), a hollow rectangular cylinder (234) being provided on the bottom wall inside the hollow cylinder (231), and a side threaded hole (232) communicating with the hollow cylinder (231) being provided on the circumferential surface of the hollow cylinder (231).

7. The cylinder liner extractor of claim 6, wherein, A motor (4) is provided at the bottom of the hollow cylinder (231), and a threaded column (6) extending into the hollow rectangular cylinder (234) is provided at the output shaft of the motor (4). A second piston (5) located below the partition plate (22) is provided inside the hollow cylinder (231).

8. The cylinder liner extractor of claim 6, wherein, The second piston (5) includes a piston block (51). The outer ring of the piston block (51) is tightly fitted to the inner wall of the hollow cylinder (231) and is located below the side threaded hole (232). A rectangular block (52) is provided on the side of the piston block (51) facing the motor (4). A second threaded blind hole (53) is provided on the surface of the rectangular block (52) facing the motor (4). The threaded post (6) extends into the interior of the second threaded blind hole (53) and is threadedly connected to the second threaded blind hole (53).

9. The cylinder liner extractor of claim 6, wherein, The hydraulic telescopic rod (3) includes a first telescopic rod (31), a second telescopic rod (32), and a third telescopic rod (33). The internal structures of the first telescopic rod (31), the second telescopic rod (32), and the third telescopic rod (33) are the same, but their lengths are different.

10. The cylinder liner extractor of claim 9, wherein, The first telescopic rod (31) includes a hollow cylinder (34), which is threadedly connected to the side threaded hole (232) and communicates with the hollow cylinder body (231). A connecting cover (35) is provided at one end of the hollow cylinder (34) away from the liquid reservoir (2). An inner sealing ring (39) is provided inside the connecting cover (35). A first piston (36) is provided inside the hollow cylinder (34) and is tightly fitted to the inner wall of the hollow cylinder (34). A connecting rod (37) is provided on the side of the first piston (36) away from the liquid reservoir (2) that penetrates the connecting cover (35) and extends outside the connecting cover (35). The connecting rod (37) is tightly fitted to the inner ring of the inner sealing ring (39). A contact plate (38) is provided at one end of the connecting rod (37) away from the liquid reservoir (2).

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