CN216975052U - Main bearing cap dismounting structure - Google Patents

Abstract

The utility model relates to the technical field of diesel engines, and discloses a main bearing cap dismounting structure which comprises a diesel engine body, wherein the main bearing cap body is arranged in the diesel engine body, and a first lifting hole corresponding to the right side of the main bearing cap body is formed in the front side and the back side of the right side of the main bearing cap body. According to the utility model, through the cooperation of the main bearing cap body, the jacking hydraulic cylinder, the extension bar I and the lifting ring screw I, the action of the vertical direction movement of the main bearing cap body is realized by utilizing the movement of the jacking hydraulic cylinder, the effect of dismounting the main bearing cap body is achieved, the problem that the main bearing cap body is inconvenient to dismount due to space limitation is effectively solved, the step of dismounting the main bearing cap body is simplified by adopting the jacking mode of the main bearing cap body, the workload of dismounting the main bearing cap body by workers is reduced, and the overhaul work of the diesel engine body is facilitated.

Description

Main bearing cap dismounting structure

Technical Field

The utility model relates to the technical field of diesel engines, in particular to a main bearing cap dismounting structure.

Background

The diesel engine is an internal combustion engine using diesel oil as fuel, the diesel engine belongs to a compression ignition type engine, and is also called a diesel engine by the name of diesel of the main inventor, when the diesel engine works, air in a cylinder of the diesel engine is sucked, the air is compressed to a higher degree due to the movement of a piston to reach the high temperature of 500-700 ℃, then fuel oil is sprayed into the high temperature air in a mist form to be mixed with the high temperature air to form combustible mixed gas, the combustible mixed gas is automatically ignited and combusted, energy released in the combustion acts on the top surface of the piston to push the piston and is converted into rotary mechanical work through a connecting rod and a crankshaft, internal components of the diesel oil fuel comprise a power transmission part, a vehicle body, a main bearing, an air valve, a fuel oil system, a speed regulator, a lubricating system, a cooling system and a starting system internal combustion engine, and the diesel oil fuel is characterized by low temperature, so the diesel oil and a spark plug are not used, the ignition device uses compressed air to raise the air temperature, diesel oil is oxidized to test the air temperature, then the air mixture of diesel oil spray spontaneous combustion is injected into the combustion chamber, the diesel oil pump is sent to a filter pump (to ensure sufficient fuel oil and maintain a certain pressure, the fuel supply quantity of a fuel delivery pump is required to be much larger than the required quantity of a fuel injection pump, the redundant diesel oil returns to a fuel tank through a low-pressure pipe, and other parts of diesel oil are compressed to high pressure by the fuel injection pump) and directly enters a compression ignition cylinder of the combustion chamber.

However, when the diesel engine is overhauled, the main bearing nut needs to be detached, the main bearing cover is detached to replace the bearing bush, sometimes the bearing cover needs to be detached out of the diesel engine frame, and due to the fact that the small diesel engine is small in space and relatively small in size, the bearing cover can be lifted and disassembled by using standard lifting screws, workers can assist the small diesel engine by using the lifting holes, but for a high-power high-speed diesel engine, the internal space of the large diesel engine is small, the balance is heavy, the distance between the large diesel engine and the bearing cover is short, and the large diesel engine cannot be simply suitable for lifting the bearing cover by using the lifting screws; meanwhile, the bearing cover is large in volume and mass, the manual assistance degree is very limited, the dismounting difficulty of the main bearing cover is increased, the workload of workers is increased, inconvenience is brought to the overhauling work of the diesel engine, and therefore the working efficiency of diesel engine overhauling is reduced.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides a main bearing cap dismounting structure which has the advantages of simplifying the steps of dismounting the main bearing cap, improving the working efficiency of dismounting the main bearing cap, reducing the workload of workers and facilitating the overhaul work of the workers, and solves the problems in the background art.

The utility model provides the following technical scheme: the utility model provides a main bearing cap dismouting structure, includes the diesel engine body, the inside of diesel engine body is provided with the main bearing cap body, the corresponding lifting hole that rises in position is seted up to the front and the back on main bearing cap body right side, an extension bar that the inner wall screw thread of a lifting hole cup jointed, an extension bar keeps away from the inner wall screw thread of a lifting hole one end and has cup jointed an eyebolt, the lower terminal surface of main bearing cap body is provided with the jacking pneumatic cylinder, the operation panel is installed to one side that the main bearing cap body was kept away from to the jacking pneumatic cylinder.

Preferably, the front side and the back side of the left side of the main bearing cap body are provided with two lifting holes corresponding to each other in position, the lower end of the main bearing cap body is provided with three lifting holes below the first lifting hole, and the left side of the third lifting hole is provided with four lifting holes.

Preferably, No. two extension bars have been cup jointed to the inner wall screw thread of No. two lifting eyes, No. two extension bars keep away from the inner wall screw thread of No. two lifting eyes one end and cup joint No. two lifting screw that are located the outside of main bearing cap body.

Preferably, No. three extension bars have been cup jointed to the inner wall screw thread of lifting eye No. three, No. three positive inner wall screw threads of extension bar have been cup jointed No. three eyebolts, and No. three eyebolt's front end extends to the outside of main bearing cap body.

Preferably, the left side of No. three extension bars is provided with No. four extension bars, and the outer wall of No. four extension bars cup joints with the inner wall screw thread of No. four lifting holes, the inner wall screw thread of No. four extension bar front ends cup joints and is located No. four lifting holes outside eyebolt.

Preferably, one end of the lifting bolt number four is provided with threads, the outer wall of one end of the lifting bolt number four is in threaded sleeve joint with the inner wall of the extension rod number four, and the inner wall of the extension rod number four is provided with threads corresponding to the outer wall of the lifting bolt number four.

Compared with the prior art, the utility model has the following beneficial effects:

1. according to the utility model, through the matching among the main bearing cap body, the jacking hydraulic cylinder, the first extension bar and the first lifting bolt, the action of vertical direction movement of the main bearing cap body is realized by utilizing the movement of the jacking hydraulic cylinder, the effect of dismounting the main bearing cap body is achieved, the problem that the main bearing cap body is inconvenient to dismount due to space limitation is effectively solved, the step of dismounting the main bearing cap body is simplified by adopting the jacking mode of the main bearing cap body, the workload of dismounting the main bearing cap body by workers is reduced, and the overhaul work of the diesel engine body is facilitated.

2. According to the utility model, through the matching between the main bearing cover body, the extension bar, the lifting bolt and the main bearing main body, the threaded sleeve connection of the extension bar and the lifting bolt is utilized, so that the effect of convenient assembly and disassembly of the extension bar and the lifting bolt is realized, the problem of installation of the lifting bolt is effectively solved, and the lifting bolt can be connected with the extension bar in a threaded sleeve connection manner by adopting the extension bar and the lifting bolt, and can be directly connected with the main bearing cover body, so that the use flexibility of the lifting bolt is improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a side view of an extension bar number two of the present invention;

FIG. 3 is a front view of the jacking cylinder of the present invention;

FIG. 4 is a side view of the console of the present invention;

FIG. 5 is a front view of a number three eye screw of the present invention;

FIG. 6 is a side view of the size four extension bar of the present invention;

figure 7 is a cross-sectional side view of a number four eye screw of the present invention.

In the figure: 1. a diesel engine body; 2. a main bearing cap body; 3. a first lifting hole; 4. a first extension bar; 5. a first eye screw; 6. a jacking hydraulic cylinder; 7. an operation table; 8. a second lifting hole; 9. a third lifting hole; 10. lifting holes No. four; 11. a second extension bar; 12. a second eye screw; 13. a third extension bar; 14. a ring screw number three; 15. a fourth extension bar; 16. no. four eyebolts.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 and 3, a main bearing cap dismounting structure comprises a diesel engine body 1, a main bearing cap body 2 is arranged in the diesel engine body 1, a first lifting hole 3 corresponding to the position is arranged on the front surface and the back surface of the right side of the main bearing cap body 2, a first extension bar 4 sleeved with the inner wall of the first lifting hole 3 through screw threads, the first extension bar 4 is installed to connect the first lifting hole 3 with a first lifting screw 5, the inner wall of the first extension bar 4 far away from one end of the first lifting hole 3 is sleeved with the first lifting screw 5, a lifting hydraulic cylinder 6 is arranged on the lower end surface of the main bearing cap body 2, the installation of the lifting hydraulic cylinder 6 is used when the main bearing cap body 2 is limited by space and cannot be dismounted, the dismounting of the main bearing cap body 2 is facilitated, the dismounting and mounting steps of the main bearing cap body 2 are simplified, and the overhaul of the diesel engine body 1 is facilitated, an operating platform 7 is installed on one side, far away from the main bearing cover body 2, of the jacking hydraulic cylinder 6, and the operating platform 7 is installed to provide support and a platform for placing the jacking hydraulic cylinder 6.

Referring to fig. 2 and 3, the front side and the back side of the left side of the main bearing cap body 2 are provided with two lifting holes 8 corresponding in position, the lower end of the main bearing cap body 2 is provided with three lifting holes 9 located below the first lifting hole 3, the left side of the third lifting hole 9 is provided with four lifting holes 10, the inner wall thread of the second lifting hole 8 is sleeved with a second extension bar 11, the second extension bar 11 plays a role in connecting the second lifting hole 8 with a second lifting screw 12, the inner wall thread of the second extension bar 11 at the end far away from the second lifting hole 8 is sleeved with a second lifting screw 12 located outside the main bearing cap body 2, and the installation of the second lifting screw 12 and the first lifting screw 5 provides a tool for disassembling and assembling the low main bearing cap body 2.

Referring to fig. 4 and 5, a third extension bar 13 is sleeved on the inner wall thread of the third lifting hole 9, a third lifting bolt 14 is sleeved on the inner wall thread of the front surface of the third extension bar 13, the third extension bar 13 provides a connection function for the third lifting hole 9 and the third lifting bolt 14, and the front end of the third lifting bolt 14 extends to the outside of the main bearing cap body 2.

Referring to fig. 6 and 7, a fourth extension bar 15 is arranged on the left side of the third extension bar 13, the outer wall of the fourth extension bar 15 is in threaded sleeve connection with the inner wall of the fourth lifting hole 10, a fourth lifting bolt 16 positioned outside the fourth lifting hole 10 is in threaded sleeve connection with the inner wall of the front end of the fourth extension bar 15, the fourth lifting bolt 16 and the third lifting bolt 14 are arranged to support the lifting of the high main bearing cap body 2, one end of the fourth lifting bolt 16 is provided with a thread, the outer wall of one end of the fourth lifting bolt 16 is in threaded sleeve connection with the inner wall of the fourth extension bar 15, and the inner wall of the extension bar 15 is provided with the screw thread corresponding to the outer wall of the lifting bolt 16, the connection mode of the screw thread sleeve connection is convenient for the disassembly and assembly of the extension bar 15 and the lifting bolt 16, the utilization rate and the flexibility of the lifting bolt 16 in use are improved, and whether the extension bar 15 is installed or not can be judged according to actual requirements.

The working principle is as follows: when the main bearing cover body 2 is used, firstly, when the lower main bearing cover body 2 is lifted, according to the actual situation, when the first extension bar 4 and the second extension bar 11 are required to be installed, the first extension bar 4 is turned to the inside of the first lifting hole 3, then the first lifting screw 5 is turned to the inside of the first extension bar 4, the second extension bar 11 is turned to the inside of the second lifting hole 8, then the second lifting screw 12 is turned to the inside of the second extension bar 11, after the first extension bar 4 and the second extension bar 11 are stably connected with the main bearing cover body 2, the first lifting screw 5 and the second lifting screw 12 are lifted, the first lifting screw 5 and the second lifting screw 12 can drive the main bearing cover body 2 to synchronously move, so that the effect of dismounting the lower main bearing cover body 2 can be realized, when the first extension bar 4 and the second extension bar 11 are not required to be used, the hoisting method comprises the steps of directly connecting a first hoisting bolt 5 with a first hoisting hole 3, directly connecting a second hoisting bolt 12 with a second hoisting hole 8, hoisting the low main bearing cap body 2, then installing a third hoisting bolt 14 and a third extension bar 13 into the third hoisting hole 9 when the main bearing cap body 2 is hoisted to a balance weight or other mechanisms in a machine interfere with a hoisting assembly, then installing a fourth extension bar 15 and a fourth hoisting bolt 16 into a fourth hoisting hole 10, removing the first hoisting bolt 5 and the second hoisting bolt 12 when hoisting instruments are installed in place, continuously hoisting the main bearing cap body 2, and finally, when the main bearing cap body 2 is in a heavy hoisting process, limiting the main bearing cap body, placing a jacking hydraulic cylinder 6 on the surface of an operation table 7, and starting a hydraulic pump, the hydraulic pump open the elevating movement who realizes jacking pneumatic cylinder 6's vertical direction to drive and realize the jacking to main bearing cap body 2 after the upper end of jacking pneumatic cylinder 6 and the lower extreme contact of main bearing cap body 2, thereby reach the dismouting effect of main bearing cap body 2.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Meanwhile, in the drawings of the utility model, the filling pattern is only used for distinguishing the layers and is not limited at all.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides a main bearing cap dismouting structure, includes diesel engine body (1), its characterized in that: the inside of diesel engine body (1) is provided with main bearing cap body (2), the corresponding lifting hole (3) of position is seted up to the front and the back on main bearing cap body (2) right side, an extension bar (4) that the inner wall screw thread of lifting hole (3) cup jointed, an inner wall screw thread that extension bar (4) kept away from a lifting hole (3) one end has cup jointed a hoisting screw (5), the lower terminal surface of main bearing cap body (2) is provided with jacking pneumatic cylinder (6), one side that main bearing cap body (2) was kept away from in jacking pneumatic cylinder (6) is installed operation panel (7).

2. The main bearing cap attaching and detaching structure according to claim 1, wherein: the left front and the back of the main bearing cap body (2) are provided with a second lifting hole (8) corresponding in position, the lower end of the main bearing cap body (2) is provided with a third lifting hole (9) below the first lifting hole (3), and the left side of the third lifting hole (9) is provided with a fourth lifting hole (10).

3. The main bearing cap attaching and detaching structure according to claim 2, wherein: no. two extension bars (11) have been cup jointed to the inner wall screw thread of No. two lifting holes (8), No. two extension bars (11) keep away from No. two lifting holes (8) one end the inner wall screw thread cup joint be located the outside rings screw (12) of main bearing cap body (2).

4. The main bearing cap attaching and detaching structure according to claim 2, wherein: no. three extension bar (13) have been cup jointed to the inner wall screw thread of lifting eye (9) No. three, No. three rings screw (14) have been cup jointed to the positive inner wall screw thread of extension bar (13) No. three, and the front end of No. three rings screw (14) extends to the outside of main bearing cap body (2).

5. The main bearing cap attaching and detaching structure according to claim 4, wherein: the left side of No. three extension bar (13) is provided with No. four extension bar (15), and the outer wall of No. four extension bar (15) and the inner wall screw thread of No. four lifting holes (10) cup joint, the inner wall screw thread of No. four extension bar (15) front end has cup jointed No. four eyebolt (16) that are located No. four lifting holes (10) outside.

6. The main bearing cap attaching and detaching structure according to claim 5, wherein: one end of the fourth lifting ring screw (16) is provided with threads, the outer wall of one end of the fourth lifting ring screw (16) is sleeved with the inner wall threads of the fourth extension bar (15), and the inner wall of the fourth extension bar (15) is provided with threads corresponding to the outer wall of the fourth lifting ring screw (16).

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