CN107443300A - A kind of use for diesel engine crank spindle watt extracting tool and method for dismounting - Google Patents

Abstract

The invention belongs to the technical field of diesel engine maintenance, and in particular relates to a dismantling tool and method for a crankshaft main bush used in a diesel engine. A crankshaft main bush removal tool for a diesel engine proposed has a rolling bush main body; the rolling bush main body is in the shape of an arc that fits on the crankshaft main journal; The width is greater than the width of the main bearing bush; the inner diameter surface of the rolling bearing main body is provided with a wedge shaft for matching with the oil passage on the main journal of the crankshaft; the wedge shaft is provided with an O-shaped groove; the outer diameter surface of the rolling bearing main body has threads hole; the removal tool also includes a handle that is threadedly connected with the threaded hole on the main body of the rolling tile; the lower part of the handle has an external thread, which is convenient for connecting with the externally curved threaded hole of the rolling tile; the upper end of the handle has an O-ring. The invention greatly reduces labor intensity and labor time for workers to check crankshaft main journal bearing bushes, and improves work efficiency.

Description

Tool and method for removing crankshaft main bush for diesel engine

technical field

The invention belongs to the technical field of diesel engine maintenance, and in particular relates to a dismantling tool and method for a crankshaft main bush used in a diesel engine.

Background technique

The crankshaft main bush is an important connecting part between the crankshaft and the engine body of the diesel engine. It bears the high-speed rotation and extrusion of the crankshaft. After the diesel engine test run is over or the diesel engine has been in operation for a long time, it is necessary to disassemble and check the state of the main bush after operation. The more common method is to run the machine After the end, remove the main bearing cover of the body, and check the condition of the main bush that is in contact with the main bearing. If you want to check the main bush that is in contact with the body, you need to remove the crankshaft to check the condition of the main bush that is connected to the body. The method has a large workload and is time-consuming and labor-intensive.

Contents of the invention

In order to solve the above technical problems, the object of the present invention is to provide a crankshaft main bush removal tool and method for a diesel engine.

The present invention adopts following technical scheme for accomplishing the above object:

A crankshaft main bearing removal tool for a diesel engine, the removal tool has a rolling bearing main body; the rolling bearing main body is in the shape of an arc that fits on the main journal of the crankshaft, and the two ends of the rolling bearing main body respectively have rectangular clips groove, and the notch width of the rectangular slot is larger than the width of the main bearing; the inner diameter surface of the rolling bearing main body is provided with a wedge shaft for matching with the oil passage on the main journal of the crankshaft; the wedge shaft There is an O-shaped groove for easy installation of an O-ring, and the end of the wedge shaft is chamfered for easy installation into the crankshaft main journal oil passage hole; the outer diameter surface of the rolling shoe body has a threaded hole; the disassembly The tool also includes a handle threadedly connected with the threaded hole on the main body of the rolling tile; the lower part of the handle has an external thread, which is convenient for connecting with the threaded hole bent outside the rolling tile; the upper end of the handle has an O-ring.

The method of using the above-mentioned crankshaft main bush removal tool for a diesel engine is as follows: first remove the main bearing cap; then insert the rolling shoe wedge shaft equipped with an O-ring into the oil passage of the crankshaft main journal, and then turn the crankshaft to make The main bearing shell is embedded in the rectangular opening of the rolling shell and continues to be cranked. The crankshaft drives the rolling shell to move and then drives the main shell to move. When the main shell is completely out of the machine body, you can check the condition of the main journal bearing shell. After checking, crank again , turn the crankshaft to the initial cranking position, the rolling tile will also turn out, screw the thread of the O-shaped handle into the thread of the outer curved middle part of the rolling tile, pull the O-ring of the O-shaped handle, and pull out the rolling tile Finally, put the main bush on the main journal of the crankshaft, and gently push the main bush into the original corresponding part of the body by hand.

The invention discloses a crankshaft main bush removal tool and disassembly method for a diesel engine. The tool has a simple structure, is convenient to use, and has low cost and manufacturing cost. Strength and labor time, improve work efficiency.

Description of drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic structural view 1 of the rolling tile main body in the present invention.

Fig. 3 is a schematic structural view 2 of the rolling tile main body in the present invention.

Fig. 4 is a structural schematic diagram of the handle in the present invention.

Fig. 5 is a schematic diagram of the removal and connection structure between the removal tool and the main bearing bush of the crankshaft according to the present invention.

In the figure: 1. Rolling tile main body, 11. Rectangular card slot, 12. Wedge shaft, 13. O-shaped groove, 14. Chamfer, 15. Threaded hole, 2. Handle, 21. O-ring, 22. External thread , 3, O-ring, 4, crankshaft main journal, 41, oil passage, 5, main bearing bush.

detailed description

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1, combined with Figure 5, a crankshaft main bush removal tool for a diesel engine, the removal tool has a rolling pad main body 1; combined with Figures 2 and 3, the said rolling pad main body, 1 is a bonding The arc shape on the main journal of the crankshaft, the two ends of the rolling shoe main body 1 have rectangular clamping grooves 11 respectively, and the notch width of the rectangular clamping groove 11 is larger than the width of the main bearing bearing 5; the rolling shoe main body 1 A wedge shaft 12 is provided on the inner diameter surface to match the oil passage on the main journal of the crankshaft; the wedge shaft 12 is provided with an O-shaped groove 13 for easy installation of an O-ring, and the end of the wedge shaft has a chamfer 14 , which is convenient for loading into the crankshaft main journal oil passage hole; the outer diameter surface of the rolling pad main body has a threaded hole 15; the removal tool also includes a handle 2 threadedly connected with the screw hole on the rolling pad main body The lower part of the handle 2 has an external thread 22, which is convenient to connect with the threaded hole 15 bent outside the roll tile; the upper end of the handle 2 has an O-ring 21.

The method of using the above-mentioned crankshaft main bush removal tool for a diesel engine is as follows: first remove the main bearing cap; then insert the rolling shoe wedge shaft equipped with an O-ring into the oil passage of the crankshaft main journal, and then turn the crankshaft to make The main bearing shell is embedded in the rectangular opening of the rolling shell and continues to be cranked. The crankshaft drives the rolling shell to move and then drives the main shell to move. When the main shell is completely out of the machine body, you can check the condition of the main journal bearing shell. After checking, crank again , turn the crankshaft to the initial cranking position, the rolling tile will also turn out, screw the thread of the O-shaped handle into the thread of the outer curved middle part of the rolling tile, pull the O-ring of the O-shaped handle, and pull out the rolling tile Finally, put the main bush on the main journal of the crankshaft, and gently push the main bush into the original corresponding part of the body by hand.

Claims (2)

1. A kind of 1. use for diesel engine crank spindle watt extracting tool, it is characterised in that：Described extracting tool has volume watt main body；Institute The volume watt main body stated is the arc-shaped on fitting main bearing journal, and the both ends of the volume watt main body have rectangle neck respectively, and The width of rebate of the rectangle neck is more than the width of main bearing shell；Be provided with the aperture surface of the volume watt main body to bent axle The wedge axle that oil duct kiss on trunnion is matched somebody with somebody；Described wedge axle is provided with O-shaped groove, is easy to install O-ring additional, and wedge shaft end has chamfering, It is easy to load in main bearing journal oil hole；There is screwed hole in the outer diameter face of the volume watt main body；Described extracting tool is also Include the handle being threadedly coupled with the screwed hole in volume watt main body；The bottom of the handle has external screw thread, be easy to Roll up the screwed hole connection of watt outside sweep；The upper end of the handle has o-ring.
2. 2. the method dismantled using a kind of use for diesel engine crank spindle watt extracting tool described in claim 1 is：First will Main beating cap is dismantled；Then the volume watt wedge axle equipped with O-ring is inserted in the oil duct of main bearing journal, then jiggering, makes main shaft In watt embedded volume watt rectangular aperture, continue jiggering, drive volume watt to move by bent axle and then drive main bearing shell motion, when main bearing shell is complete Entirely after body area comes out, you can check the situation of trunnion bearing shell, after checking, jiggering, goes to bent axle just again Beginning jiggering position, volume watt can also produce, and in the screw thread the outside sweep middle part for being threaded into volume watt of O-shaped handle, can draw O The o-ring of type handle, volume watt is pulled up；Finally main bearing shell is put on main bearing journal, slid into hand handle main bearing shell The original corresponding position of body.