CN213946286U - Disassembling tool for crankshaft damper of diesel engine - Google Patents

Abstract

The utility model relates to a disassembling tool for a crankshaft shock absorber of a diesel engine, which comprises a piston, a shell, an extended connecting pipe and a transition plate; the piston and the shell are provided with positioning pins, so that the functions of positioning the crankshaft and the shock absorber can be realized, and the piston shell assembly can be reversely assembled and is respectively used for assembly and disassembly; one end of the lengthened connecting pipe is provided with an external thread which is matched with the oil hole at the tail end of the crankshaft, and the other end of the lengthened connecting pipe is provided with an internal thread which is matched with the quick connector; the transition plate is positioned between the shell and the shock absorber, and a threaded hole and a countersunk through hole are arranged on the transition plate, so that the connection effect can be achieved. The utility model discloses the realization is dismantled the function of installation to the bent axle bumper shock absorber, simple to use, convenient operation, and the range of application is wide, but different models can be applied to this type.

Description

Disassembling tool for crankshaft damper of diesel engine

Technical Field

The utility model relates to a diesel engine technical field specifically is a disassembling tool of diesel engine bent axle bumper shock absorber, the high-power series diesel engine of specially adapted ship.

Background

The diesel engine comprises two forms of a four-stroke diesel engine and a two-stroke diesel engine, wherein the four-stroke diesel engine is most widely applied, and the working process of the four-stroke diesel engine comprises four working processes of air intake, compression, combustion work and air exhaust. The diesel engine has the outstanding advantages of strong power, low oil consumption (15-30 percent lower than that of a gasoline engine), low pollutant discharge, high reliability and the like, and becomes a power machine with the most extensive application in the current human society. The method is widely applied to various fields of national economy, such as automobiles, tractors, engineering machinery, small agricultural power, industrial fixed power generation, railway locomotives, ships, military naval vessels, tanks and the like.

In the case of diesel engines, the crankshaft is one of its main moving parts, being a torsionally elastic system, which has a certain natural frequency of vibration. During the operation of the diesel engine, because each cylinder is fired for each time, the magnitude and direction of the force transmitted to the crank pin of the crankshaft through the connecting rod are periodically changed, and the instantaneous angular speed of the crank throw rotation of the crankshaft caused by the periodic exciting force is also periodically changed. Because the moment of inertia of the flywheel mounted at the end of the crankshaft is large, the angular velocity of the flywheel can be approximately considered to be uniform, so that the instantaneous angular velocity of the crank throw is suddenly fast and suddenly slow relative to the flywheel, and torsional vibration relative to the flywheel is formed. When the torsional vibration frequency and the self-vibration frequency of the crankshaft form resonance, the torsional vibration of the crankshaft is intensified, the power of the engine is lost, and the abrasion of the timing gear is intensified.

The comprehensive action of the restoring force of the elastic element in the crankshaft shock absorber and the damping of the lubricating oil can reduce the torsional vibration amplitude; the fatigue life of the crankshaft is prolonged. Torque is transmitted, and torque fluctuation is reduced; the vibration and noise level of the diesel engine is reduced.

Therefore, the crankshaft damper plays an important role in the service life, efficiency, vibration, noise and the like of the diesel engine. And in fact bent axle and bumper shock absorber are mostly the design product, need design corresponding assembly and disassembly tools to different interface sizes, probably cause the problem that the instrument is complicated, the dismouting is inconvenient.

Disclosure of Invention

An object of the utility model is to overcome above-mentioned prior art not enough, provide a diesel engine crankshaft damper's assembly and disassembly tools, can only accomplish assembly and dismantlement work with a set of instrument, have simple structure, convenient operation's characteristics.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

a disassembling tool for a crankshaft shock absorber of a diesel engine is characterized by comprising a piston, a shell, a lengthened connecting pipe and a transition plate; the piston and the shell are provided with positioning pins, so that the functions of positioning the crankshaft and the shock absorber can be realized, and the piston shell assembly can be reversely assembled and is respectively used for assembly and disassembly; one end of the lengthened connecting pipe is provided with an external thread which is matched with the oil hole at the tail end of the crankshaft, and the other end of the lengthened connecting pipe is provided with an internal thread which is matched with the quick connector; the transition plate is positioned between the shell and the shock absorber, and a threaded hole and a countersunk through hole are arranged on the transition plate, so that the connection effect can be achieved.

Piston and casing on install the locating pin, can realize the function of location bent axle and bumper shock absorber, and piston housing assembly can reverse assembly, is used for assembling and dismantles respectively.

The piston and shell assembly is externally connected with a high-pressure oil pump to drive the assembly and disassembly of the shock absorber.

One end of the lengthened connecting pipe is provided with an external thread, and the other end of the lengthened connecting pipe is provided with an internal thread, and is connected with a manual pump and a crankshaft, so that the function of opening a shock absorber pump and then fastening the shock absorber pump at the tail end of the crankshaft is realized.

The transition plate can be used for connecting the shell with different thread pitch circle diameters with the shock absorber.

Because the inner wall of the shock absorber and the tail end of the crankshaft are conical surfaces with 1:80 conicity, the inner wall of the shock absorber is required to be expanded under the action of high-pressure oil and then move forwards or backwards under the action of the stretcher until reaching a limiting point or being loosened, and therefore the mounting and dismounting of the shock absorber are realized. Therefore, a lengthened connecting pipe must be installed, so that the lubricating oil from the manual pump can enter the oil passage of the crankshaft, and the diameter of the inner wall of the shock absorber is enlarged under the action of pressure.

During assembly, the tail end of the shock absorber is also connected with a crankshaft gear ring of the diesel engine, so whether the relative position deviation of the shock absorber and the crankshaft determines whether the timing of the diesel engine is accurate, and therefore when the shock absorber is installed, the relative position of the shock absorber and the crankshaft needs to be ensured. Two positioning pins are therefore provided at the axial position of the piston and the housing. And a radial positioning pin is also designed at the convex shoulder of the shell, and a guide groove is designed on the piston, so that the relative positions of the shock absorber shell and the piston cannot be changed no matter in work or non-work, and the relative positions of a crankshaft and a shock absorber positioned by the shock absorber cannot be influenced. During assembly, the outer diameter of the shoulder designed on the shell is slightly smaller than the inner diameter of the end part of the shock absorber, and the inner diameter of the shoulder is smaller than the diameter of the tail end of the crankshaft, so that the shock absorber can be pushed to advance after the stretcher is pressurized, a limiting effect can be achieved, the end faces of the shock absorber and the crankshaft are flush, the requirement on installation size is met, and the complete meshing of the crankshaft gear ring and the tooth faces of other timing gears is ensured.

When the damper assembly is disassembled, because the pitch circle sizes of the connecting bolt hole at the tail end of the crankshaft and the connecting bolt hole of the damper are determined, if the pitch circle sizes of the connecting through hole in the shell and the connecting bolt hole are consistent, the acting area of the internal pressure of the stretcher is sharply reduced under the condition of ensuring the structural strength, so that the pressure requirement in the cavity is sharply increased, and the gravity component force of the damper assembly along the conical surface and the friction force of oil sliding on the inner wall of the damper assembly are overcome. The excessive pressure puts high requirements on the sealing performance of the O-shaped ring and the safety of the product. Therefore, in order to ensure the sealing performance and the economical efficiency of the stretcher, the pitch circle sizes of the connecting through holes on the shell and the connecting bolt holes on the shock absorber are different when the stretcher is designed, the shock absorber is phi 225mm, the shell is phi 250mm, and the pressure action area 1 in the chamber is12cm². Therefore, the transition plate is required to be used, bolt holes connected with the shell are distributed on the outer ring of the transition plate, and the inner ring of the transition plate is provided with countersunk head through holes for mounting hexagon socket head cap screws connected with the connecting bolt holes of the shock absorber. When the stretcher is dismounted, the stretcher is reversely mounted, the shell slides outwards under the action of high-pressure oil in the cavity, and the shock absorber is pulled through the connecting plate to realize the dismounting function. And after the shock absorber separates with the bent axle end, under the pulling force effect, the connecting plate finally can contact with the terminal surface of piston, can also realize limit function, prevents that the shock absorber from flying out from the bent axle end suddenly.

The method for disassembling and assembling by using the disassembling and assembling tool of the crankshaft shock absorber of the diesel engine comprises the following steps:

during assembly:

step 1: hoisting the shock absorber assembly by using the hoisting ring screw;

step 2: matching the damper with the tail end of the crankshaft until the damper is half of the thickness of the crankshaft;

and step 3: aligning the damper hole and the crankshaft pin hole with a positioning pin on the stretcher respectively, and then continuously installing the damper until the damper cannot be pushed by manpower;

and 4, step 4: the stretcher is assembled in the forward direction and fixed at the tail end of the crankshaft through a connecting bolt hole in a piston of the stretcher, so that the piston and two positioning pins on a shell are ensured to be installed correctly;

and 5: mounting the lengthened connecting pipe, connecting the lengthened connecting pipe with a manual pump, and simultaneously connecting the shell with a high-pressure pump;

step 6: pressurizing the inner cavity of the stretcher to a value recommended by a manufacturer through a high-pressure pump;

and 7: pressurizing the shock absorber and the conical surface of the crankshaft by using a manual pump until the values are recommended by a manufacturer;

and 8: releasing the pressure in the manual pump after the stretcher housing is no longer advanced;

step 9, releasing the pressure in the high-pressure pump after 30 seconds, and removing the stretcher and the accessories thereof

When the device is disassembled:

step 1: installing a distance ring and installing a transition plate on the shock absorber by utilizing an inner hexagonal screw;

step 2: reversely mounting the stretcher on the distance ring, fixing the piston at the tail end of the crankshaft by using a bolt, and then mounting a connecting bolt of the shell and the transition plate;

and step 3: mounting the lengthened connecting pipe, connecting the lengthened connecting pipe with a manual pump, and simultaneously connecting the shell with a high-pressure pump;

and 4, step 4: pressurizing the conical parts of the crankshaft and the shock absorber to a value recommended by a manufacturer by using a manual pump;

and 5: pressurizing the inner cavity of the stretcher by using a high-pressure pump until reaching a limiting position;

step 6: releasing the pressure in the manual pump and the high pressure pump;

and 7: removing the stretcher and accessories thereof;

and 8: the shock absorber slides along the conical surface of the crankshaft until the shock absorber can be lifted by a lifting ring screw and detached.

Compared with the prior art, the beneficial effects of the utility model are that:

firstly, the utility model realizes the positioning function of the crankshaft and the shock absorber;

② the utility model discloses set up positioning function when the assembly, can guarantee the bumper shock absorber

The mounting size of (a);

the utility model has a limit function when being dismantled, which can improve the installation performance when being dismantled;

fourthly, the stretcher of the utility model can be assembled in the forward direction and the reverse direction, and can realize the functions of assembly and disassembly respectively, and has the characteristics of simple operation, convenient use, economy and reliability

Drawings

Fig. 1 is the schematic view of the utility model discloses during diesel engine crankshaft damper assembly and disassembly tools assembly, wherein, an is the plan view, b is the stereogram, and C is the A-A section view of a, and d is the C-C section view of a.

Fig. 2 is a schematic view of the dismounting tool for diesel engine crankshaft damper of the present invention, wherein a is a top view, b is a perspective view, C is a bottom view, d is a sectional view from a to a, and e is a sectional view from C to C of a.

Fig. 3 is a schematic diagram of the assembling method of the disassembling tool for the crankshaft damper of the diesel engine of the present invention, wherein a is before assembling, B is after assembling, C is a C-C sectional view of d, d is a B-B sectional view of e, and e is a top view.

Fig. 4 is a schematic diagram of the disassembling tool for crankshaft damper of diesel engine according to the present invention, wherein a is before disassembling, B is after disassembling, C is C-C sectional view of e, d is B-B sectional view of e, and e is a top view.

Detailed Description

The invention will be described in further detail with reference to the drawings and specific examples, which should not be construed as limiting the scope of the invention.

Referring to fig. 1-2, fig. 1 is a schematic structural view of the dismounting tool for diesel engine crankshaft damper of the present invention during assembly, and fig. 2 is a schematic structural view of the dismounting tool for diesel engine crankshaft damper of the present invention during disassembly. As shown in fig. 1, when the tool for disassembling and assembling the crankshaft damper of the diesel engine is used for assembling, the tool comprises a shell 1, a piston 2, a positioning pin 6, a connecting bolt 7 and other parts; the shell 1 is provided with a positioning pin 6, and the piston 2 is provided with a guide groove; the connecting bolt 7 is used for fastening the piston and the tail end of the crankshaft. As shown in fig. 2. When the diesel engine crankshaft damper dismounting tool is used for dismounting, the diesel engine crankshaft damper dismounting tool comprises a shell 1, a piston 2, a positioning pin 6, a transition plate 12, a distance ring 13, a connecting bolt 11, an inner hexagon screw 14 and a connecting bolt 15; the shell 1 is provided with a positioning pin 6, and the piston 2 is provided with a guide groove; the inner ring and the outer ring of the transition plate 12 are respectively distributed with connecting bolt holes and countersunk through holes; the connecting bolt 11 is used for fastening the shell 1 and the transition plate 12;

the inner hexagon screw 14 is used for fastening the transition plate 12 and the shock absorber; the connecting bolt 15 is used for fastening the piston 2 and the tail end of the crankshaft.

Fig. 3 is the utility model discloses crankshaft damper assembly and disassembly tools assembly method sketch, as can be seen in the drawing, the utility model discloses concrete operation during crankshaft damper assembly and disassembly tools assembly uses the step as follows:

step 1: hoisting the shock absorber assembly by using the hoisting ring screw;

step 2: matching the damper with the tail end of the crankshaft until the damper is half of the thickness of the crankshaft;

and step 3: aligning the damper hole and the crankshaft pin hole with positioning pins 16 and 17 on the stretcher respectively, and then continuously installing the damper until the damper cannot be pushed by manpower;

and 4, step 4: the stretcher is assembled in the forward direction, and is fixed at the tail end of the crankshaft through a connecting bolt 7 on a piston of the stretcher, so that the piston and two positioning pins on a shell are ensured to be installed correctly;

and 5: the lengthened connecting pipe 18 is installed and connected with a manual pump 20, and meanwhile, the shell is connected with a high-pressure pump 19;

step 6: pressurizing the inner cavity of the stretcher to the value recommended by the manufacturer through a high-pressure pump 19;

and 7: pressurizing the damper and the crankshaft conical surface by using a manual pump 20 until the numerical value recommended by a manufacturer is reached;

and 8: after the stretcher housing is no longer advanced, the pressure in the manual pump 20 is released;

step 9-release of the pressure in the high-pressure pump 19 after 30 seconds, removal of the stretcher and its accessories

Fig. 4 is the utility model discloses crankshaft damper assembly and disassembly tools dismantles method schematic diagram, as can be seen in the figure, the utility model discloses concrete operation use step when crankshaft damper assembly and disassembly tools dismantles is as follows:

step 1: installing a distance ring 13 and installing a transition plate 12 on the shock absorber by using an inner hexagon screw 14;

step 2: reversely mounting the stretcher on the distance ring 13, fixing the piston at the tail end of the crankshaft by using a bolt 15, and then mounting a connecting bolt 11 of the shell and the transition plate;

and step 3: the lengthened connecting pipe 18 is installed and connected with a manual pump 20, and meanwhile, the shell is connected with a high-pressure pump 19;

and 4, step 4: the conical parts of the crankshaft and the shock absorber are pressurized to the recommended value of the manufacturer by a manual pump 20;

and 5: pressurizing the inner chamber of the stretcher by using a high-pressure pump 19 until reaching a limit position;

step 6: releasing the pressure in the manual pump 20 and the high-pressure pump 19;

and 7: removing the stretcher and accessories thereof;

and 8: the shock absorber slides along the conical surface of the crankshaft until the shock absorber can be lifted by a lifting ring screw and detached.

The above is a preferred embodiment of the present invention, and the protection scope of the present invention is not limited thereto. The scope of the present invention also includes other modifications and substitutions apparent to those skilled in the art.

Claims (4)

1. A disassembling tool for a crankshaft shock absorber of a diesel engine is characterized by comprising a piston, a shell, a lengthened connecting pipe and a transition plate; the piston and the shell are provided with positioning pins, so that the functions of positioning the crankshaft and the shock absorber can be realized, and the piston shell assembly can be reversely assembled and is respectively used for assembly and disassembly; one end of the lengthened connecting pipe is provided with an external thread which is matched with the oil hole at the tail end of the crankshaft, and the other end of the lengthened connecting pipe is provided with an internal thread which is matched with the quick connector; the transition plate is positioned between the shell and the shock absorber, and a threaded hole and a countersunk through hole are arranged on the transition plate, so that the connection effect can be achieved.

2. The tool for disassembling and assembling the crankshaft shock absorber of the diesel engine as claimed in claim 1, wherein the piston and housing assembly is externally connected with a high-pressure oil pump to drive the assembling and disassembling of the shock absorber.

3. The tool for disassembling and assembling the crankshaft shock absorber of the diesel engine as claimed in claim 1, wherein one end of the lengthened connecting pipe is provided with an external thread, and the other end of the lengthened connecting pipe is provided with an internal thread, so that a manual pump and the crankshaft are connected, and the function of opening and then fastening the shock absorber pump at the tail end of the crankshaft is realized.

4. The tool for disassembling and assembling the crankshaft shock absorber of the diesel engine as claimed in claim 1, wherein the transition plate can connect the shell with different pitch circle diameters of the thread with the shock absorber.

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