Cylinder liner extraction device

Abstract

The present invention discloses a cylinder sleeve extraction device, comprising a support part and a driving unit passing through the support part, the driving unit comprising a knob part and a transmission bolt, and also comprising an extraction device sleeved on the outer periphery of the lower end of the transmission bolt; the extraction device comprises an upper pressing plate, a lower pressing plate, an expansion block, and a rubber plate, a plurality of expansion blocks surrounding the transmission bolt are arranged between the upper pressing plate and the lower pressing plate, a slide groove is also arranged in the middle position of each expansion block, and a circle of annular rubber plates is arranged to fit the outer periphery of the expansion block; a second groove is arranged in the middle position of the lower surface of the lower pressing plate, and the shape of the second groove matches the shape of the head of the transmission bolt, and a stop positioning column is passed through the upper pressing plate, the lower pressing plate and the support frame, and the stop positioning column passes through the slide groove of the expansion block. The present invention is simple to operate, convenient and labor-saving, quick to extract, low noise, and can play a good protective role for the extracted cylinder sleeve.

Description

Technical Field

[0001] The invention relates to the technical field of engine maintenance equipment, in particular to a cylinder sleeve pulling device. Background Art

[0002] When the engine is being repaired, some engines need to disassemble and inspect the cylinder liner. Since there is no special cylinder liner extraction device, when pulling out the cylinder liner, it is necessary to manually use tools such as hammers and crowbars to knock the bottom end surface of the cylinder liner to knock it out of the crankcase. This method is not only inefficient, noisy, and labor-intensive, but also easy to damage the cylinder liner.

[0003] The patent (CN212351850U) discloses a composite cylinder head cylinder liner extraction tool, including a nut, a cone, two semicircular bodies, a flange body, an impact body and a screw. The lower part of the screw has a thread, and the upper part has a knob; the nut is screwed on the lower end of the screw; the cone is sleeved on the screw with the cone tip facing upward and is located above the nut; each semicircular body has a semi-conical hole with the cone tip facing upward, and the two semicircular bodies are arranged on the cone with semi-conical holes opposite to each other, and each semicircular body includes two bolt holes, which are arranged on one side of the straight side of the semicircular body; the flange body is screwed on the screw and is located on the upper part of the two semicircular bodies; the impact body is sleeved on the screw and is located above the flange body. It can easily and quickly remove the faulty cylinder liner left in the blind hole of the cylinder head due to fracture. It is mainly aimed at removing the faulty cylinder liner. Since it is aimed at the failed and scrapped cylinder liner, it cannot play a good protective role on the cylinder liner.

[0004] The patent (CN112497143A) discloses a cylinder liner pulling device with a special structure, including a support plate, a support rod and a pull rod. A thrust bearing is embedded in the middle of the support plate, and a pull nut is embedded in the inner ring of the thrust bearing. The top of the pull nut extends from the inside of the thrust bearing. The part of the pull nut extending from the thrust bearing is sleeved with a rotating kit. The pull rod passes through the pull nut, and the top of the pull rod adopts a threaded structure; the support rod is detachably installed under the support plate, and the bottom of the pull rod is also sleeved with a locking piece for locking the cylinder liner of the cylinder block. The present invention is suitable for cylinder maintenance. By setting the device, the cylinder liner of the cylinder can be directly pulled out, and the device is provided with a rotating kit, and the rotating kit is used to replace the wrench. Such a structural setting makes the device more convenient when the horn is used. It only needs to rotate the rotating kit continuously. Although the operation is convenient and quick. However, it can only pull out the cylinder liner of the type with two ends of the mounting hole through the body, and the bottom of the cylinder liner exposed can be used to install the pull-out tool hook. The cylinder liner installed in the blind hole of the composite cylinder head cannot be removed. And this structure can not play a protective effect on the pulled-out cylinder sleeve. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a cylinder sleeve extraction device which is simple to operate, convenient and labor-saving, can be extracted quickly, has low noise, and can provide good protection for the extracted cylinder sleeve.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A cylinder sleeve extraction device comprises a support portion and a driving unit penetrating the support portion, the driving unit comprises a knob portion and a transmission bolt, and also comprises an extraction device sleeved on the outer periphery of the lower end of the transmission bolt;

[0008] The pulling device includes an upper pressure plate, a lower pressure plate, an expansion block, and a rubber plate. A plurality of expansion blocks surrounding the transmission bolt are arranged between the upper pressure plate and the lower pressure plate. A slide groove is also arranged in the middle of each expansion block. A ring-shaped rubber plate is arranged in contact with the outer periphery of the expansion block. A second groove is arranged in the middle of the lower surface of the lower pressure plate, and the shape of the second groove matches the shape of the head of the transmission bolt. Stop positioning columns are passed through the upper pressure plate, the lower pressure plate and the support frame, and the stop positioning columns pass through the slide grooves of the expansion blocks.

[0009] A further improvement of the technical solution of the present invention lies in that: the supporting part is a supporting frame, a through hole is arranged at the center position of the upper surface of the supporting frame, and a limiting hole which is symmetrical with respect to the through hole is also arranged on the supporting frame; small holes and a first groove corresponding to the position of the limiting hole are respectively arranged on the upper pressure plate and the lower pressure plate, and the stop positioning column passes through the limiting hole, the small hole, the slide groove in sequence and abuts against the bottom surface of the first groove.

[0010] A further improvement of the technical solution of the present invention is that: there are two of the limiting holes and two of the stop positioning columns.

[0011] A further improvement of the technical solution of the present invention is that: the driving unit includes a transmission bolt as a driven driving member, a knob part as an active driving member, a tightening member and an auxiliary member, the upper end of the transmission bolt passes through the through hole and extends upward; the knob part is installed on the upper end of the transmission bolt by threaded rotation, and is in contact with the center position of the upper end surface of the support frame, the tightening member is a clamping nut, and the clamping nut is arranged in the middle part of the transmission bolt by threaded rotation, and the auxiliary member is a conical top column, and the conical top column is sleeved on the bottom of the transmission bolt.

[0012] A further improvement of the technical solution of the present invention is that the extraction device is arranged between the clamping nut and the conical top column and is penetrated by the transmission bolt.

[0013] A further improvement of the technical solution of the present invention is that the small holes and the first grooves are both individual and are distributed in an annular array on the upper pressing plate and the lower pressing plate respectively.

[0014] A further improvement of the technical solution of the present invention is that: the expansion block is fan-shaped, a plurality of expansion blocks surround a circle, and the slide groove is a long strip slide groove.

[0015] Due to the adoption of the above technical solution, the technical progress achieved by the present invention is:

[0016] The present invention utilizes the friction between the rubber plate and the inner wall of the cylinder sleeve to quickly and non-destructively pull out the cylinder sleeve, thereby improving the pulling efficiency, reducing the labor intensity, reducing the noise, and ensuring the product quality of the cylinder sleeve.

[0017] The present invention can achieve rapid positioning through the stop positioning column, and because there are four small holes and four first grooves, but only two stop positioning columns, the angle that needs to be adjusted during positioning becomes smaller, thereby improving the efficiency of positioning.

[0018] The extraction device is arranged between the clamping nut and the conical top column, which can ensure the positioning of the extraction device and prevent it from moving up and down, and at the same time is convenient for disassembly and simple for operation.

[0019] The expansion block is arranged in a fan shape and surrounds a circle, so that the tension of the expansion block to the surroundings can be more uniform, thereby facilitating the compression effect on the cylinder sleeve to pull out the cylinder sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the transmission bolt of the present invention;

[0022] Figure 3 It is a structural schematic diagram of the lower pressing plate of the present invention;

[0023] Figure 4 It is a structural schematic diagram of the rubber sheet of the present invention;

[0024] Figure 5 It is a structural schematic diagram of the upper pressing plate of the present invention;

[0025] Figure 6 It is a structural schematic diagram of the compression nut of the present invention;

[0026] Figure 7 It is a structural schematic diagram of the support frame of the present invention;

[0027] Figure 8 It is a structural schematic diagram of the stop positioning column of the present invention;

[0028] Fig. 9 It is a structural schematic diagram of the knob portion of the present invention;

[0029] Fig.10 It is a structural schematic diagram of the expansion block of the present invention;

[0030] Fig.11 It is a structural schematic diagram of the conical top column of the present invention;

[0031] Among them, 1. transmission bolt, 2. lower pressure plate, 3. rubber plate, 4. upper pressure plate, 5. clamping nut, 6. support frame, 7. stop positioning column, 8. knob part, 9. expansion block, 10. conical top column, 11. through hole, 12. limit hole, 13. small hole, 14. first groove, 15. slide groove, 16. second groove. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with embodiments:

[0033] like Figure 1 As shown, a cylinder sleeve extraction device comprises a support portion and a driving unit penetrating the support portion, the driving unit comprises a knob portion 8 and a driving bolt 1, the knob portion 8 is used to drive the extraction device to perform corresponding actions and to extract the compressed extraction device and the cylinder sleeve outward, and also comprises an extraction device sleeved on the outer periphery of the lower end of the driving bolt 1, the extraction device is mainly used to compress the cylinder sleeve and has a main extraction function;

[0034] The pulling-out device includes an upper pressure plate 4, a lower pressure plate 2, an expansion block 9, and a rubber sheet 3. A plurality of expansion blocks 9 surrounding the transmission bolt 1 are arranged between the upper pressure plate 4 and the lower pressure plate 2. A slide groove 15 is also arranged in the middle of each expansion block 9. A ring-shaped rubber sheet 3 is arranged in contact with the outer periphery of the expansion block 9. A second groove 16 is arranged in the middle of the lower surface of the lower pressure plate 2, and the shape of the second groove 16 matches the shape of the head of the transmission bolt 1. The upper pressure plate 4, the lower pressure plate 2 and the support frame 6 are penetrated by a stop positioning column 7, and the stop positioning column 7 passes through the slide groove 15 of the expansion block 9.

[0035] Preferably, the supporting part is a supporting frame 6, a through hole 11 is provided at the center position of the upper surface of the supporting frame 6, and a limiting hole 12 which is symmetrical with respect to the through hole 11 is also provided on the supporting frame 6; a small hole 13 and a first groove 14 corresponding to the position of the limiting hole 12 are respectively provided on the upper pressure plate 4 and the lower pressure plate 2, and the stop positioning column 7 passes through the limiting hole 12, the small hole 13, the slide groove 15 in sequence and abuts against the bottom surface of the first groove 14.

[0036] Preferably, there are two of the limiting holes 12 and the stop positioning columns 7. Through the stop positioning columns 7, quick positioning can be achieved. Moreover, since there are four of the small holes 13 and the first grooves 14, and there are only two of the stop positioning columns 7, the angle that needs to be adjusted during positioning becomes smaller, thereby improving the efficiency of positioning.

[0037] Preferably, the driving unit includes a transmission bolt 1 as a driven driving member, a knob portion 8 as an active driving member, a tightening member and an auxiliary member, the upper end of the transmission bolt 1 passes through the through hole 11 and extends upward; the knob portion 8 is installed on the upper end of the transmission bolt 1 by threaded rotation, and is in contact with the center position of the upper end surface of the support frame 6, the tightening member is a clamping nut 5, and the clamping nut 5 is arranged in the middle of the transmission bolt 1 by threaded rotation, and the auxiliary member is a conical top column 10, and the conical top column 10 is sleeved on the bottom of the transmission bolt 1.

[0038] Preferably, the extraction device is disposed between the compression nut 5 and the conical top column 10 , and is penetrated by the transmission bolt 1 .

[0039] Preferably, the number of the small holes 13 and the number of the first grooves 14 are four, and they are respectively distributed in a circular array on the upper pressing plate 4 and the lower pressing plate 2 to reduce the angles that need to be adjusted during positioning, making the positioning process simpler and more convenient.

[0040] Preferably, the expansion block 9 is fan-shaped, a plurality of expansion blocks 9 form a circle, and the slide groove 15 is a long strip-shaped slide groove 15 .

[0041] Working principle and usage:

[0042] Place the bracket on the mounting surface of the crankcase cylinder sleeve, and put the part below the clamping nut 5 into the cylinder sleeve. Tighten the clamping nut 5 downwards. The head of the driving bolt 1 is fixed by the groove at the bottom of the lower pressure plate 2 and cannot rotate with the clamping nut 5. The clamping nut 5 can rotate downward along the screw rod of the driving bolt 1. During the rotation, the clamping nut 5 presses the upper pressure plate 4 downward until the upper pressure plate 4 contacts the expansion block 9. Since the bottom support of the expansion block 9 is a conical top column 10, as the upper pressure plate 4 continues to move downward, the expansion block 9 is forced to move around along the conical surface until it fits with the rubber sheet 3 and gradually squeezes the rubber sheet 3 to deform outward. As the deformation of the rubber sheet 3 increases, the outer edge of the rubber sheet 3 contacts the inner wall of the cylinder head. Continue to tighten the clamping nut 5, and the friction between the rubber sheet 3 and the inner wall of the cylinder head increases until the cylinder sleeve can be pulled out. At this time, stop tightening the clamping nut 5 and pull out the stop positioning column 7. Then, the knob portion 8 is turned. As the knob portion 8 rotates, the transmission bolt 1 drives the cylinder sleeve to start moving upward until the cylinder sleeve is completely pulled out.

[0043] The embodiments described above are merely descriptions of preferred implementation modes of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A cylinder sleeve extraction device, comprising a support portion and a drive unit penetrating the support portion, the drive unit comprising a knob portion (8) and a transmission bolt (1), characterized in that It also includes: a pulling device sleeved on the outer periphery of the lower end of the transmission bolt; The pulling device comprises an upper pressure plate (4), a lower pressure plate (2), an expansion block (9), and a rubber plate (3); a plurality of expansion blocks (9) surrounding the outside of the transmission bolt (1) are arranged between the upper pressure plate (4) and the lower pressure plate (2); a slide groove (15) is also arranged in the middle of each expansion block (9); a ring-shaped rubber plate (3) is arranged in contact with the outer periphery of the expansion block (9); a second groove (16) is arranged in the middle of the lower surface of the lower pressure plate (2), and the shape of the second groove (16) matches the shape of the head of the transmission bolt (1); a stop positioning column (7) is passed through the upper pressure plate (4), the lower pressure plate (2) and the support frame (6), and the stop positioning column (7) passes through the slide groove (15) of the expansion block (9); The support portion is a support frame (6), a through hole (11) is provided at the center position of the upper surface of the support frame (6), and a limit hole (12) is also provided on the support frame (6) which is symmetrical with respect to the through hole (11); a small hole (13) and a first groove (14) corresponding to the position of the limit hole (12) are respectively provided on the upper pressing plate (4) and the lower pressing plate (2), and the stop positioning column (7) passes through the limit hole (12), the small hole (13), and the slide groove (15) in sequence and abuts against the bottom surface of the first groove (14); There are two limit holes (12) and two stop positioning columns (7); the expansion block (9) is fan-shaped, a plurality of expansion blocks (9) form a circle, and the slide groove (15) is a long strip slide groove (15).

2. A cylinder liner extraction device according to claim 1, characterized in that: The drive unit comprises a transmission bolt (1) as a driven drive member, a knob portion (8) as an active drive member, a tightening member and an auxiliary member. The upper end of the transmission bolt (1) passes through the through hole (11) and extends upward. The knob portion (8) is installed on the upper end of the transmission bolt (1) by threaded rotation and fits with the center position of the upper end surface of the support frame (6). The tightening member is a clamping nut (5) which is arranged in the middle of the transmission bolt (1) by threaded rotation. The auxiliary member is a conical top column (10) which is sleeved on the bottom of the transmission bolt (1).

3. A cylinder liner extraction device according to claim 2, characterized in that: The extraction device is arranged between the clamping nut (5) and the conical top column (10), and is penetrated by the transmission bolt (1).

4. A cylinder liner extraction device according to claim 1, characterized in that: The number of the small holes (13) and the number of the first grooves (14) are both four, and they are distributed in a circular array on the upper pressing plate (4) and the lower pressing plate (2).

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