WO2018000865A1

WO2018000865A1 - Lifting tool and lifting method for c8000 camshaft

Info

Publication number: WO2018000865A1
Application number: PCT/CN2017/078174
Authority: WO
Inventors: 梁振杰; 谭贵荣
Original assignee: 广西玉柴机器股份有限公司
Priority date: 2016-06-29
Filing date: 2017-03-24
Publication date: 2018-01-04
Also published as: CN105947875B; CN105947875A

Abstract

A lifting tool for a C8000 camshaft comprises a ring (1), a chain (2) connected with the ring (1), wherein a middle portion of the chain (2) is connected with the ring (1), and both ends of the chain (2) are respectively provided with a clamping device (3) for clamping the camshaft; the clamping device (3) comprises a clamping portion adapted to the camshaft and a first pivot (4) provided on the clamping portion and passing through the same; a connecting block (5) is hinged to one of the projecting ends of the first pivot (4) in a direction perpendicular to the axis thereof, and the connecting block (5) is connected to the chain (2). A lifting method of a C8000 camshaft is also disclosed. The lifting tool is simple and stable, improves the safety for a long distance movement of the camshaft and avoids damage to the working surface of the C8000 camshaft.

Description

Lifting tool and lifting method for C8000 camshaft

Technical field

The invention relates to the technical field of manufacturing and assembly of internal combustion engines, and more particularly to a lifting tool and a lifting method for a C8000 camshaft.

Background technique

The camshaft products in the internal combustion engine are mostly long cylindrical cylinders. Because of the special structure of the camshaft, the journal diameter and the diameter of the cam tip are not much different, and are lifted by ordinary spreaders, and the lifting height is low. It is feasible to move the distance shortly and not to cross the obstacle; however, for large camshafts, it is unsafe to lift the crane with a high lifting height, a long moving distance and an obstacle. At the same time, there are cases where it is difficult to take out the spreader in the package. The existence of such contradiction is not conducive to the long-distance cross-object lifting of large camshafts during crack detection, and it also brings safety hazards to the production of enterprises.

Summary of the invention

The technical problem to be solved by the present invention is to provide a hoisting tool and a hoisting method which are simple in structure, stable, and convenient in operation, and can realize long-distance movement of the camshaft and improve its safety performance.

The technical solution of the present invention is as follows: a lifting tool of a C8000 camshaft, comprising a lifting ring and a chain connected to the lifting ring, wherein a middle portion of the chain is connected with the lifting ring, and two ends of the chain are respectively provided for holding a clamping device for a camshaft, the clamping device comprising a clamping portion adapted to the camshaft and a first pivot disposed on the clamping portion and passing through the clamping portion, at the first A connecting block is hinged to one of the projecting ends of the pivot shaft in a direction perpendicular to the axis, and the connecting block is connected to the chain.

As a further improvement, the clamping portion includes a front clamping portion and a rear clamping portion that are hinged to each other, and a portion of the front clamping portion and the rear clamping portion located above the first pivot shaft is a handle of the clamping portion, a portion of the front clamping portion located below the first pivot shaft is provided with a locking portion, and a portion of the rear clamping portion located below the first pivot shaft is provided for supporting The hook body of the camshaft.

Further, the clamping portion is further provided with a locking spring that can adjust the size of the opening between the locking portion and the hook body, and the locking spring vertically passes through the handle of the clamping portion And respectively tightened to the locking portion and the hook body.

Further, the first pivot shaft sequentially passes through the front clamping portion and the rear clamping portion and extends outwardly with a U-shaped hinge block hinged with the connecting block, on the hinge block A second pivot connected to the connecting block is provided.

Further, the second pivot shaft is vertically inserted into the through hole provided in the hinge block, and the first pivot shaft is perpendicular to and intersects with the rotation axis of the second pivot shaft.

Further, at the other protruding end of the first pivot, a first split pin and a first pin hole and a first washer restricting the axial displacement of the first pivot are provided, the first pivot middle portion And a cylindrical pin respectively adapted to the front clamping portion and the rear clamping portion and configured as a pin hole, wherein the second pivot shaft has a limiting boss at one end and a second split pin at the other end; a second pin hole and a second washer.

Further, a limiting slot for accommodating the connecting block is disposed between the handles above the clamping portion.

Further, the connecting block includes a hinge seat connected to the first pivot shaft, and a connecting portion connected to the chain, the hinge seat extends outward and is bent to form a horizontal card portion. Moreover, the angle between the connecting portion and the latching portion is 0°. 90°.

A method for hoisting a C8000 camshaft by designing a special lifting tool having a two-dimensional limit to achieve long-distance movement of the camshaft.

Specifically, the following steps are included:

Step 1. Move the lifting tool to the top of the camshaft using a crane remote control remote control;

Step 2. Lower the height of the lifting tool to ensure that the parts on the upper part of the lifting tool are completely loosened;

Step 3: Hold the upper part of the clamping device at one end of the lifting tool by hand, press the handle of the clamping part forcefully, hook the non-working cylindrical surface of the cam shaft into the hook body, and then loosen the handle of the clamping part. ;

Step 4, repeat step 3, hooking the camshaft into the clamping device at the other end of the lifting tool;

Step 5. Slowly raise the height of the lifting tool, and automatically adjust each part on the clamping device to smoothly move the cam shaft to a specified position;

Step 6. Slowly lower the lifting tool and repeat the actions of

steps

3 and 4 to disengage the camshaft from the lifting tool.

Beneficial effect

Compared with the prior art, the invention has the following advantages:

1. The clamping portion of the present invention clamps the cam shaft by the cooperation of the hook hook body and the locking portion, thereby avoiding damage to the camshaft, and providing a lock vertically passing through the clamping portion on the clamping portion. The spring is tightly clamped and loosened to facilitate the operation of the worker;

2. The split pin and the limit cylindrical pin provided on the first pivot of the present invention can prevent the first pivot from being disengaged from the clamping portion, and can also prevent the hinge screw from rotating, thereby causing the connecting block to interfere with the clamping device. And the axis of rotation of the first pivot and the second pivot are perpendicular to each other and intersect, so that the connecting block can slide freely or slide out of the clamping portion;

3. A limiting slot is arranged between the front clamping portion and the rear clamping portion. When the camshaft is hoisted, the locking portion of the connecting block is screwed into the limiting slot, so that the front clamping portion and the rear clamping portion cannot Relative rotation prevents the camshaft from falling off during lifting, resulting in a safety accident;

4. The angle between 0° and 90° between the connecting part and the latching part of the connecting block improves the rigidity of the connecting block, and the connecting block can be rotated around the hinge screw by a certain angle so that the lifting tool can be installed Clamp camshafts of different lengths and ensure that their clamping devices do not close to the middle to avoid stress concentration and damage the camshaft.

DRAWINGS

Figure 1 is a schematic perspective view of the present invention;

Figure 2 is an enlarged schematic view showing the side structure of the clamping device of the present invention;

Figure 3 is an enlarged schematic view showing the front structure of the clamping device of the present invention;

Figure 4 is an enlarged schematic cross-sectional view of the A-A of Figure 2;

Figure 5 is an enlarged schematic view showing the structure of a connecting block in the present invention;

Figure 6 is an enlarged schematic view showing the structure of the first pivot in the present invention;

Figure 7 is an enlarged schematic view showing the structure of a second pivot in the present invention.

Among them: 1-loop, 2-chain, 3-clamping device, 4-first pivot, 5-connecting block, 6-front clamping part, 7-rear clamping part, 8-locking part, 9- Hook hook, 10-lock spring, 11-second pivot, 12-first cotter pin, 13-first washer, 14-cylinder pin, 15-second cotter pin, 16-second washer, 17-restricted slot, 41-hinged block, 42 - through hole, 43 - first pin hole, 44 - is configured as pin hole, 51 - hinged seat, 52 - connecting portion, 53 - latching portion, 111 - limiting boss, 112 - second pin hole.

detailed description

The invention will be further described below in conjunction with specific embodiments in the drawings.

Referring to Figures 1-7, a C8000 camshaft lifting tool of the present invention includes a lifting ring 1 and a chain 2 connected to the lifting ring 1. The middle portion of the chain 2 is fixedly connected to the lifting ring 1, and the lengths of the two chain chains 2 are equal. The camshaft is prevented from being uneven when the tool is hoisted, and the camshaft is inclined; a clamping device 3 for clamping the camshaft is respectively disposed at two ends of the chain 2, and the clamping device 3 includes a camshaft a matching clamping portion and a first pivot 4 disposed on the clamping portion thereof and passing through the clamping portion, a connecting block 5 is hinged on a protruding end of the first pivot 4 in a direction perpendicular to the axis And the connecting block 5 is connected to the chain 2. The lifting ring 1, the chain 2 and the clamping device 3 of the invention constitute a lifting tool for carrying a large camshaft of the engine, which improves the reliability and safety when clamping the camshaft, avoids production accidents, and effectively protects The working surface of the camshaft is easy to operate and has a wide range of applications.

In the present invention, the clamping portion includes a front clamping portion 6 and a rear clamping portion 7 that are hinged to each other by the first pivot 4, and a portion of the front clamping portion 6 and the rear clamping portion 7 above the first pivot 4 The handle of the clamping portion is convenient for the worker to operate, and the portion of the front clamping portion 6 below the first pivot 4 is provided with a locking portion 8 for closing the cam shaft to prevent the cam shaft from sliding out of the clamping portion. A portion of the rear grip portion 7 located below the first pivot 4 is provided with a hook hook 9 for supporting the cam shaft, and the grip portion is further provided with an adjustable locking portion 8 and the hook hook 9 An opening-sized locking spring 10 that vertically passes through the handle of the clamping portion and is divided into Do not tighten the locking portion 8 and the hook hook body 9 in the form of a spring mechanism to realize clamping and loosening of the cam shaft for easy operation; the first pivot shaft 4 passes through the front clamping portion 6 in turn. The rear clamping portion 7 extends outwardly with a U-shaped hinge block 41 hinged to the connecting block 5, and the hinge block 41 is provided with a through hole 42, and the hinge block 41 is provided with a hinge block 41 and a connection in sequence. a second pivot shaft 11 of the block 5, the second pivot shaft 11 is vertically inserted into the through hole 42 in the hinge block 41, and the first pivot shaft 4 thereof is perpendicular to and intersects with the rotation axis of the second pivot shaft 11 It is ensured that the connecting block 5 slides accurately into the cavity between the front clamping portion 6 and the rear clamping portion 7 during lifting.

The other protruding end of the first pivot shaft 4 of the present invention is provided with a first split pin 12 and a first pin hole 43 and a first washer 13 for limiting the axial displacement of the first pivot shaft 4, at the first pivot shaft 4 The middle portion is further provided with a cylindrical pin 14 respectively adapted to the front clamping portion 6 and the rear clamping portion 7, and is configured as a pin hole 44 to restrict the rotation of the first pivot shaft 4 and prevent the connecting block 5 from the front clamping portion 6 and The rear clamping portion 7 interferes; the second pivot shaft 11 is provided with a limiting boss 111 at one end, and the second opening pin 15 and the second pin hole 112 and the second washer 16 are disposed at the other end for limiting the second pivot 11 The axial displacement prevents the connecting block 5 from coming off.

The connecting block 5 in the present invention comprises a hinge seat 51 connected to the first pivot shaft 4 and the second pivot shaft 11, and a connecting portion 52 connected to the chain 2, the hinge seat 51 extending outward and bent to form a horizontal The latching portion 53 is provided with a limiting slot 17 for receiving the latching portion 53 between the handles above the clamping portion, and the latching portion 53 is adapted to the limiting slot 17 to prevent lifting. The cam is axially squeezed outwardly to rotate the front clamping portion 6 and the rear clamping portion 7 relative to each other, causing the cam shaft to fall off. In the lifting tool, the cam shaft is secondarily restricted to the cam shaft falling off; The angle between the portion 52 and the latching portion 53 is 0° to 90°, which improves the rigidity of the connecting block 5, and the connecting block 5 can be rotated around the hinge screw by a certain angle so that the lifting tool can be clamped with different lengths. The camshaft is ensured that its clamping device 3 does not close to the intermediate portion, avoiding stress concentration and damaging the camshaft.

A lifting method for a C8000 camshaft, characterized in that the method realizes long-distance movement of a camshaft by designing a special lifting tool having a two-dimensional limit.

Step 3, holding the upper part of the clamping device 3 at one end of the lifting tool by hand, pressing the handle of the clamping portion forcefully, hooking the non-working cylindrical surface of the cam shaft into the hook body 9, and then loosening the clamping portion Handle

Step 4, repeat step 3, hook the cam shaft into the clamping device 3 at the other end of the lifting tool;

Step 5, slowly raising the height of the lifting tool, and automatically fixing each component on the clamping device 3 to smoothly move the cam shaft to a designated position;

Step 6. Slowly lower the lifting tool and repeat the actions of

steps

3 and 4 to disengage the camshaft from the lifting tool.

The above is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention, which will not affect the implementation of the present invention. The effect and utility of the patent.

Claims

A lifting tool for a C8000 camshaft, comprising a lifting ring (1) and a chain (2) connected to the lifting ring (1), characterized in that the middle portion of the chain (2) is connected with the lifting ring (1), the Each of the two ends of the chain (2) is provided with a clamping device (3) for clamping a camshaft, the clamping device (3) comprising a clamping portion adapted to the camshaft and being disposed at the clamping portion a first pivot (4) passing through the clamping portion, and a connecting block (5) is hinged on a protruding end of the first pivot (4) perpendicular to the axis, the A connecting block (5) is connected to the chain (2).
A lifting tool for a C8000 camshaft according to claim 1, wherein said clamping portion comprises a front clamping portion (6) and a rear clamping portion (7) hinged to each other, said front clamp a portion of the holding portion (6) and the rear clamping portion (7) above the first pivot (4) serves as a handle of the clamping portion, and the front clamping portion (6) is located at the A portion below a pivot (4) is provided with a locking portion (8), and a portion of the rear clamping portion (7) below the first pivot (4) is provided with a hook for supporting the cam shaft Hook body (9).
A lifting tool for a C8000 camshaft according to claim 2, wherein said clamping portion is further provided with an adjustable between said locking portion (8) and said hook body (9) An opening-sized locking spring (10), the locking spring (10) vertically passes through the handle of the clamping portion and is respectively tightened against the locking portion (8) and the hook body ( 9).
A lifting tool for a C8000 camshaft according to claim 2 or 3, wherein said first pivot (4) sequentially passes through said front clamping portion (6) and rear clamping portion (7) extending outwardly from a U-shaped hinge block (41) hinged to the connecting block (5), and the hinge block (41) is provided with a connection to the connecting block (5) Two pivots (11).
The hoisting tool for a C8000 camshaft according to claim 4, wherein the second pivot (11) is vertically inserted into the through hole (42) provided in the hinge block (41). And the first pivot (4) is perpendicular to and intersects with the axis of rotation of the second pivot (11).
A lifting tool for a C8000 camshaft according to claim 4, characterized in that the other protruding end of the first pivot (4) is provided with an axial displacement restricting the first pivot (4) a first cotter pin (12) and a first pin hole (43) and a first washer (13), wherein the first pivot (4) is further provided with a front clamping portion (6) and The rear clamping portion (7) is adapted to the cylindrical pin (14) and is configured as a pin hole (44). The second pivot (11) has a limiting boss (111) at one end and a second end at the other end. a split pin (15) and a second pin hole (112) and a second washer (16).
A lifting tool for a C8000 camshaft according to claim 2, characterized in that a limiting groove (17) for accommodating the connecting block (5) is arranged between the handles above the clamping portion.
A lifting tool for a C8000 camshaft according to claim 1, wherein said connecting block (5) comprises a hinge seat (51) connected to said first pivot (4), and The connecting portion (52) of the chain (2) is connected, the hinge seat (51) extends outwardly and is bent to form a horizontal latching portion (53), and the connecting portion (52) and the connecting portion The angle between the latching portions (53) is 0° to 90°.
A lifting method for a C8000 camshaft, characterized in that the method comprises the following steps:

Step 1. Move the lifting tool to the top of the camshaft using a crane remote control remote control;

Step 2. Lower the height of the lifting tool to ensure that the parts on the upper part of the lifting tool are finished. Fully loosened;

Step 3: Hold the upper part of the clamping device (3) at one end of the lifting tool by hand, press the handle of the clamping portion firmly, hook the non-working cylindrical surface of the cam shaft into the hook body (9), and then loose Open the handle of the grip;

Step 4, repeat step 3, hook the camshaft into the clamping device (3) at the other end of the lifting tool;

Step 5. Slowly raise the height of the lifting tool, and automatically fix the various parts on the clamping device (3) to smoothly move the cam shaft to the designated position;

Step 6. Slowly lower the lifting tool and repeat the actions of steps 3 and 4 to disengage the camshaft from the lifting tool.