Dismantling and detecting device for upper bush of diesel engine connecting rod

Abstract

The utility model provides a disassembly and inspection device for a diesel engine connecting rod upper bush. The disassembly and inspection device comprises a fixing mechanism fixedly connected with a diesel engine body and an operating mechanism. Wherein the operating mechanism comprises a positioning piece and an operating piece connected with the positioning piece; the positioning piece is fixedly connected with the connecting rod; the operating part is rotatably arranged on the fixing mechanism, so that the connecting rod fixedly connected with the positioning part can be jacked up by the positioning part, and the connecting rod is separated from the crankshaft of the diesel engine; the operating piece is provided with a limiting part, the fixing mechanism is provided with a limiting matching part, the limiting part can be fixedly connected with the limiting matching part, and then after the connecting rod is jacked up by the positioning piece, the position of the operating piece relative to the fixing mechanism is fixed. The disassembly and inspection device can quickly replace or inspect the surface of the connecting rod bearing bush.

Description

Technical Field

[0001] The utility model relates to the technical field of marine diesel engines, in particular to a disassembly and inspection device for a diesel engine connecting rod upper bearing. Background Art

[0002] The connecting rod bearing of a diesel engine is an important component of the diesel engine's moving parts and an important friction pair. Its load-bearing performance directly affects the operation and reliability of the diesel engine. Therefore, during the whole engine test and running-in, it is often necessary to disassemble the connecting rod bearing to check the surface running-in condition.

[0003] However, according to conventional operations, it is necessary to drain the cooling water (cooling water will pollute the environment), remove the exhaust bag, pipes, cylinder head and accessories, etc., which requires at least three people to work together and takes at least one day. At the same time, there are certain lifting risks in the process, such as in a narrow cabin, which makes lifting more complicated and dangerous. Utility Model Content

[0004] The utility model aims to provide a disassembly and inspection device for the connecting rod bearing of a diesel engine, which can quickly replace or inspect the surface of the connecting rod bearing without draining cooling water and without disassembling the exhaust bag, cylinder head and other accessories.

[0005] One aspect of the utility model provides a disassembly and inspection device for a connecting rod upper bearing of a diesel engine, comprising: a fixing mechanism for fixedly connecting to a body of the diesel engine; and an operating mechanism; wherein the operating mechanism comprises a positioning member and an operating member connected to the positioning member; the positioning member is used to be fixedly connected to the connecting rod; the operating member is rotatably arranged on the fixing mechanism, so that the connecting rod fixedly connected to the positioning member can be lifted up by the positioning member, thereby causing the connecting rod and the crankshaft of the diesel engine to be disengaged; the operating member is provided with a limiting portion, and the fixing mechanism is provided with a limiting matching portion, and the limiting portion can be fixedly connected to the limiting matching portion, thereby fixing the position of the operating member relative to the fixing mechanism after the connecting rod is lifted up by the positioning member.

[0006] In one embodiment, the fixing mechanism includes a fixing part fixedly connected to the body of the diesel engine and a supporting part fixedly connected to the fixing part; the supporting part is provided with the limiting fitting part, the limiting fitting part is a plurality of limiting fitting holes, the limiting part is a limiting hole, and the limiting hole can be connected to one of the plurality of limiting fitting holes, thereby fixing the position of the operating part.

[0007] In one embodiment, the support member includes a fixing plate for fixedly connecting to the fixing member and a supporting plate connected to the fixing plate, and the supporting plate includes an extension portion; the extension portion extends upward in an arc shape from the fixing plate, and a plurality of the limiting fitting holes are spaced apart in the extension portion.

[0008] In one embodiment, the support plate also includes a supporting portion connecting the fixed plate and the extension portion; the operating member is also provided with a rotation hole, and the supporting portion is provided with a rotation matching hole; the rotation hole and the rotation matching hole are pin-connected so that the operating member can rotate around the rotation hole.

[0009] In one embodiment, there are two support plates, which are symmetrically arranged on the sides of the fixed plate; there are two limiting holes and two rotating holes, which are symmetrically arranged on opposite sides of the operating member.

[0010] In one embodiment, the operating member includes an operating rod and an adjusting portion sleeved on the operating rod; the adjusting portion is provided with a locking portion; when the locking portion is in a locked state, the adjusting portion is fixed to the operating rod; when the locking portion is in an unlocked state, the adjusting portion can move along the axial direction of the operating rod; the adjusting portion is also provided with the limiting hole and the rotating hole.

[0011] In one embodiment, the extension portion is further provided with a receiving hole for connecting with the limiting hole in a receiving state, and the receiving hole is close to the free end of the extension portion.

[0012] In one embodiment, a notch is provided on one side of the fixing member close to the positioning member, and the notch provides an operating space for personnel to disassemble and inspect the connecting rod upper bearing.

[0013] In one embodiment, the positioning member is provided with a protrusion matched with the bolt hole of the connecting rod, and the protrusion is used to be inserted into the bolt hole of the connecting rod to connect the positioning member and the connecting rod.

[0014] In one embodiment, the disassembly and inspection device also includes a support rod for supporting the positioning member; one end of the support rod is connected to the positioning member, and the other end of the support rod is used to abut against the oil pan of the diesel engine, thereby enabling the support rod to generate a supporting force to support the positioning member upward.

[0015] The disassembly and inspection device for the connecting rod upper bearing of a diesel engine of the utility model is fixed by a positioning piece and the connecting rod of the diesel engine. The connecting rod can be lifted upward by rotating the operating piece. After the connecting rod is lifted up, the position of the operating piece is fixed by a limiting part and a limiting matching part, so that the connecting rod remains in a disengaged state from the crankshaft. The connecting rod bearing can be inspected or replaced without disassembling any parts, so that the diesel engine can be repaired and put into use more quickly, thereby meeting the needs of rapid repair of tests or actual ships and reducing the workload of personnel and operational risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which:

[0017] Figure 1 It is a schematic diagram of an embodiment of a disassembly and inspection device for a connecting rod upper bearing of a diesel engine according to the utility model;

[0018] Figure 2 yes Figure 1 A schematic diagram of the operating mechanism of the middle disassembly and inspection device;

[0019] Figure 3 yes Figure 1 A schematic diagram of a support member of the middle disassembly and inspection device;

[0020] Figure 4 yes Figure 1 The schematic diagram of the coordination between the disassembly and inspection device and the diesel engine shown;

[0021] Figure 5 yes Figure 4 A partial enlarged view of the matching schematic diagram shown. DETAILED DESCRIPTION

[0022] The connecting rod is a linkage component on the diesel engine. The two ends of the connecting rod are connected to the crankshaft and piston rod of the diesel engine respectively. It is an important force-bearing component on the diesel engine. The connecting rod bearing is the bearing between the connecting rod and the crankshaft of the diesel engine, including the upper and lower connecting rod bearings, which play a role in supporting and reducing friction. With the continuous use of marine diesel engines and the testing and running-in of the whole machine, it is necessary to frequently disassemble the connecting rod bearing to check the running-in condition of the surface.

[0023] However, according to the conventional operation in the past, it is necessary to release the cooling water (cooling water pollutes the environment), remove the exhaust bag, pipes, cylinder head and accessories related pipes, etc., which requires at least 3 people to work in three dimensions and takes at least one day. At the same time, there are certain lifting risks in the process. For example, lifting in a narrow cabin makes it more complicated and dangerous.

[0024] Reference will now be made in detail to embodiments of the present invention, one or more examples of which are shown in the accompanying drawings. Each example is provided to explain the present invention, rather than to limit the present invention. In fact, it will be apparent to those skilled in the art that various modifications and variations may be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature shown or described as part of one embodiment may be used together with another embodiment to produce yet another embodiment. Therefore, the present invention is intended to cover these modifications and variations that fall within the scope of the appended claims and their equivalents.

[0025] As used herein, the terms “first” and “second” may be used interchangeably to distinguish one component from another, and are not intended to indicate the position or importance of each component.

[0026] Figures 1 to 5 The structure of the disassembly and inspection device 10 for the upper bearing of the connecting rod 3 of a diesel engine of the present invention is shown. The disassembly and inspection device 10 of the present invention comprises a fixing mechanism 100 and an operating mechanism 200. The fixing mechanism 100 is used to be fixedly connected to the body 1 of the diesel engine, and the operating mechanism 200 is used to support the connecting rod 3. The operating mechanism 200 comprises a positioning member 210 and an operating member 220 connected to the positioning member 210. The positioning member 210 is used to be fixedly connected to the connecting rod 3. The operating member 220 is rotatably arranged on the fixing mechanism 100, so that the connecting rod 3 fixedly connected to the positioning member 210 can be lifted by the positioning member 210, thereby causing the connecting rod 3 to be separated from the diesel engine crankshaft 2. The operating member 220 is provided with a limiting portion, and the fixing mechanism 100 is provided with a limiting matching portion, and the limiting portion can be fixedly connected to the limiting matching portion, thereby causing the position of the operating member 220 relative to the fixing mechanism 100 to be fixed after the connecting rod 3 is lifted by the positioning member 210.

[0027] The disassembly and inspection device 10 of the diesel engine connecting rod 3 upper bearing of the utility model is fixed by the positioning member 210 and the diesel engine connecting rod 3. The connecting rod 3 can be pushed upward by rotating the operating member 220, and the position of the operating member 220 is fixed by the limiting portion and the limiting matching portion, so that the connecting rod 3 remains in a disengaged state from the crankshaft 2. The connecting rod 3 bearing can be inspected or replaced without disassembling any parts, so that the diesel engine can be repaired and put into use more quickly, thereby meeting the needs of rapid repair of tests or actual ships and reducing the workload and operating risks of personnel.

[0028] like Figure 1 As shown, in one embodiment, the fixing mechanism 100 includes a fixing member 110 fixedly connected to the body 1 of the diesel engine and a supporting member 120 fixedly connected to the fixing plate 121. Figure 1 and Figure 2 The support member 120 includes a fixing plate 121 and a support plate for fixing and connecting with the fixing member 110, and the support plate includes an extension portion 123 connected with the fixing plate 121 and a support portion 122 connecting the fixing plate 121 and the extension portion 123. The fixing plate 121 is connected with the fixing member 110 through a threaded hole 121a.

[0029] Continue to refer Figure 1 The operating member 220 includes an operating rod 221 and an adjusting portion 222 sleeved on the operating rod 221. The adjusting portion 222 can adjust the position on the operating rod 221 to facilitate fixing the position of the operating rod 221 according to actual conditions. The operating rod 221 and the positioning member 210 can be fixedly connected by bolts.

[0030] The operator is in the downward direction (i.e. Figure 1 When the operating rod 221 is pressed in the direction A) of the lever, the positioning member 210 at the other end will move upward (i.e. Figure 1 B) to lift it up and drive the connecting rod 3 to move, which is convenient for disassembly or inspection of the connecting bearing.

[0031] In one embodiment, if Figure 3 As shown, the extension portion 123 of the support member 120 is provided with a limited matching portion, and the limited matching portion is a plurality of limited matching holes 123a. In this embodiment, the limited portion is a limited hole 222a, and the limited hole 222a is provided in the adjustment portion 222. The limited hole 222a can be connected to one of the plurality of limited matching holes 123a, thereby fixing the position of the operating member 220.

[0032] refer to Figure 1 The limiting hole 222a and the limiting matching hole 123a are connected by the fastener 102 to fix the position of the adjusting portion 222 and the operating rod 221. The fastener 102 can be a bolt and a nut, wherein the bolt passes through the limiting matching hole 123a on the extension portion 123 and the limiting hole 222a on the adjusting portion 222, and is fixed on the outer side of the extension portion 123 by the nut.

[0033] In one embodiment, the adjusting portion 222 of the operating member 220 is further provided with a rotation hole 222b. Figure 2 The support portion 122 is provided with a rotationally fitting hole 122a, as shown in FIG. Figure 3 The rotation hole 222b and the rotation matching hole 122a are pin-connected so that the operating member 220 can rotate around the rotation hole 222b.

[0034] refer to Figure 1 , the rotation hole 222b and the rotation matching hole 122a are connected by the rotation pin 101. The rotation pin 101 passes through the rotation matching hole 122a and the rotation hole 222b on the adjustment part 222 from the outside of the support part 122, so that the entire operating mechanism 200 can rotate around the rotation pin 101, thereby increasing the operational flexibility of the operating mechanism 200. The operator can rotate the operating rod 221 according to the height to which the connecting rod 3 is lifted upward as required.

[0035] In one embodiment, there are two support plates, that is, two support portions 122 and two extension portions 123, and the two support plates are symmetrically arranged on the sides of the fixing plate 121. Figure 1 As shown, one side of the fixing plate 121 is connected to the fixing member 110, and the other side opposite to the above side is connected to the two supporting plates. The rotation matching hole 122a of the supporting portion 122 and the limiting matching hole 123a of the extending portion 123 are both symmetrically arranged with respect to the axis of the fixing plate 121. Figure 2As shown, there are two limit holes 222a and two rotation holes 222b, and the two limit holes 222a and the rotation holes 222b are symmetrically arranged on opposite sides of the operating member 220. In this way, the rotation stability and fixation degree of the operating rod 221 can be increased.

[0036] On the basis of the above embodiment, the extension portion 123 extends in an arc shape from the support portion 122 upward and in the direction of the fixing member 110. The positions of the limiting hole 222a and the rotating hole 222b on the adjusting portion 222 are relatively fixed, so when the operating rod 221 rotates around the rotating pin 101, the limiting hole 222a performs a circular motion relative to the rotating hole 222b. Therefore, the arc-shaped extension of the extension portion 123 can realize the matching relationship between the limiting hole 222a and the limiting matching hole 123a.

[0037] like Figure 1 and Figure 2 As shown, in this embodiment, a plurality of limiting matching holes 123a are arranged at intervals on the extension portion 123 to facilitate fixing the operating rod 221 rotated to different angles. The number, size and interval of the limiting matching holes 123a can be determined according to actual conditions, and the utility model does not limit them.

[0038] The fixing mechanism 100 and the operating mechanism 200 of the disassembling device of the utility model are separate structures. The support plate of the fixing mechanism 100 and the adjusting part 222 of the operating mechanism 200 can be connected by bolts, which can realize convenient disassembly, reduce the space and be placed in a small random tooling box, which is convenient for placement in a small space in the cabin and improves space utilization.

[0039] In one embodiment, the extension portion 123 is further provided with a receiving hole 123b for connecting with the limiting hole 222a in the receiving state, and the receiving hole 123b is close to the free end of the extension portion 123. When the disassembly and inspection device 10 is not in use, the limiting hole 222a and the receiving hole 123b on the adjustment portion 222 are fixed, so that the overall volume of the disassembly and inspection device 10 can be reduced and the storage is convenient.

[0040] Continue to refer Figure 1 and Figure 2 In one embodiment, the support portion 122 is further provided with a weight-reducing hole 122 b, which can reduce the overall weight of the disassembly and inspection device 10 without reducing the strength.

[0041] In one embodiment, the adjusting portion 222 is provided with a locking portion 222c. When the locking portion 222c is in a locked state, the adjusting portion 222 is fixed to the operating rod 221. When the locking portion 222c is in an unlocked state, the adjusting portion 222 can move along the axial direction of the operating rod 221, and the positional relationship between the limiting hole 222a and the limiting matching hole 123a, and the rotation hole 222b and the rotation matching hole 122a can be adjusted to facilitate alignment.

[0042] The locking portion 222c may be a bolt, and a screw hole (not shown) is provided on the adjusting portion 222. When the bolt is tightened downward until the end of the bolt abuts against the operating rod 221, the locking portion 222c is in a locked state; when the bolt is rotated upward to disengage from the operating rod 221, the locking portion 222c is in an unlocked state.

[0043] In one embodiment, the positioning member 210 is provided with a protrusion 211 adapted to the bolt hole of the connecting rod 3, and the protrusion 211 is used to be inserted into the bolt hole of the connecting rod 3 to connect the positioning member 210 and the connecting rod 3. Figure 1 and Figure 2 As shown, there are two protrusions 211 , which are matched with the bolt holes of the connecting rod 3 to improve the fixing effect of the positioning member 210 and the connecting rod 3 .

[0044] In one embodiment, the disassembly and inspection device 10 further includes a support rod 300 for supporting the positioning member 210. One end (i.e., the first end 310) of the support rod 300 is connected to the positioning member 210, and the other end (i.e., the second end 320) of the support rod 300 is used to abut against the oil pan (not shown) of the diesel engine, so that the support rod 300 generates a supporting force to support the positioning member 210 upward. The support rod 300 and the positioning member 210 may be connected by a pin.

[0045] like Figure 1 As shown, in one embodiment, a notch 111 is provided on one side of the fixing member 110 close to the positioning member 210, and the notch 111 provides an operating space for personnel to dismantle and inspect the upper bearing of the connecting rod 3. The notch 111 is located above the fixing member 110, and the operating clerk can use the operating space to drill in to inspect the connecting rod 3 or replace the upper bearing of the connecting rod 3.

[0046] refer to Figure 4 and 5 , and combined with Figures 1 to 3 The use process of the disassembly and inspection device 10 of the utility model is as follows:

[0047] First, before installing the disassembly and inspection device 10 on the connecting rod 3, confirm the status, open the power valve of the cylinder to be disassembled and inspected, open the AB exhaust door 1a cover to the top dead center, and two operators can cooperate to remove the lower bearing of the connecting rod 3. Slowly rotate the crankshaft 290° to the closest distance to the exhaust door 1a, and ensure that the status of the upper bearing of the connecting rod 3 does not shift with the rotation of the crankshaft 2.

[0048] Then, install the fixing member 110 of the disassembly and inspection device 10 to the door 1a of the diesel engine body and tighten it, then insert the raised portion 211 of the positioning member 210 into the bolt hole of the connecting rod 3, and adjust the front-to-back distance between the operating rod 221 and the adjusting portion 222 so that the position of the adjusting portion 222 is appropriate. Press the lever down (i.e. Figure 1The position limiting hole 222a can be connected to any adjacent position limiting matching hole 123a. During the installation process, the support rod 3006 can be supported on the oil pan support portion 122 to ensure safety, so as to prevent the positioning member 210 from falling.

[0049] After the disassembly and inspection device 10 has been fixed in place, to ensure safety, one person needs to press down behind the operating lever 221 to prevent accidents. Slowly turn the crankshaft 2 downward to disengage the connecting rod 3 from the crankshaft 2 by about 100 mm to facilitate the removal of the bearing. The operator uses the notch 111 of the fixing member 110 to drill in and use a cork block to push the upper bearing of the connecting rod 3 out of the positioning lip. After the inspection is completed, wipe the back of the connecting rod 3 bearing and the bearing hole to make them oil-free and install them. Finally, slowly turn the crankshaft 2 in the opposite direction until it fits the connecting rod 3 bearing, remove the disassembly and inspection device 10, and turn the connecting rod 3 to the top dead center and reinstall it.

[0050] By using the disassembly and inspection device 10 of the utility model, it is estimated that three operators can complete the disassembly and inspection of the upper bearing of the connecting rod 3 in about 2 hours, thereby ensuring the safety of the assembly workers, reducing the burden on the assembly workers, facilitating and quickly assembling the work, and significantly improving the assembly efficiency and quality.

[0051] The disassembly and inspection device 10 of the utility model is designed according to the connecting rod 3 and the body structure of the current diesel engine, and combined with the size of the diesel engine door 1a, so that the disassembly and inspection device 10 is compatible with the diesel engines commonly used at present.

[0052] Although the utility model is disclosed as above with preferred embodiments, it is not intended to limit the utility model. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the utility model. Therefore, any modification, equivalent change and modification made to the above embodiments based on the technical essence of the utility model without departing from the content of the technical solution of the utility model shall fall within the protection scope defined by the claims of the utility model.

Claims

1. A disassembly and inspection device for a diesel engine connecting rod upper bearing, characterized in that: include: A fixing mechanism for fixed connection with the body of the diesel engine; and operating mechanism; wherein, The operating mechanism includes a positioning member and an operating member connected to the positioning member; The positioning member is used to be fixedly connected to the connecting rod; The operating member is rotatably arranged on the fixing mechanism, so that the connecting rod fixedly connected to the positioning member can be lifted by the positioning member, thereby separating the connecting rod from the crankshaft of the diesel engine; The operating member is provided with a limiting portion, and the fixing mechanism is provided with a limiting matching portion. The limiting portion can be fixedly connected to the limiting matching portion, so that after the connecting rod is lifted by the positioning member, the position of the operating member relative to the fixing mechanism is fixed.

2. The disassembly and inspection device according to claim 1, characterized in that: The fixing mechanism comprises a fixing member fixedly connected to the body of the diesel engine and a supporting member fixedly connected to the fixing member; The support member is provided with the limiting fitting portion, which is a plurality of limiting fitting holes. The limiting portion is a limiting hole, and the limiting hole can be connected to one of the plurality of limiting fitting holes, thereby fixing the position of the operating member.

3. The disassembly and inspection device according to claim 2, characterized in that: The support member includes a fixing plate for fixedly connecting with the fixing member and a supporting plate connected with the fixing plate, wherein the supporting plate includes an extending portion; The extension portion extends upward from the fixing plate in an arc shape, and a plurality of the limiting matching holes are arranged at intervals on the extension portion.

4. The disassembly and inspection device according to claim 3, characterized in that: The support plate also includes a support portion connecting the fixing plate and the extension portion; The operating member is also provided with a rotation hole, and the supporting portion is provided with a rotation matching hole; The rotating hole and the rotating matching hole are pin-connected so that the operating member can rotate around the rotating hole.

5. The disassembly and inspection device according to claim 4, characterized in that: There are two support plates, and the two support plates are symmetrically arranged on the sides of the fixing plate; There are two of the limiting holes and two of the rotating holes, and the two limiting holes and the rotating holes are symmetrically arranged on opposite sides of the operating member.

6. The disassembly and inspection device according to claim 5, characterized in that: The operating member includes an operating rod and an adjusting portion sleeved on the operating rod; The adjusting portion is provided with a locking portion; When the locking portion is in a locked state, the adjusting portion is fixed to the operating rod; When the locking portion is in an unlocked state, the adjusting portion can move along the axial direction of the operating rod; The adjusting portion is further provided with the limiting hole and the rotating hole.

7. The disassembly and inspection device according to any one of claims 3 to 6, characterized in that: The extension portion is further provided with a receiving hole for connecting with the limiting hole in a receiving state, and the receiving hole is close to the free end of the extension portion.

8. The disassembly and inspection device according to any one of claims 2 to 6, characterized in that: A notch is provided on one side of the fixing member close to the positioning member, and the notch provides an operating space for personnel to disassemble and inspect the connecting rod upper bushing.

9. The disassembly and inspection device according to any one of claims 1 to 6, characterized in that: The positioning piece is provided with a protrusion matched with the bolt hole of the connecting rod, and the protrusion is used to be inserted into the bolt hole of the connecting rod to connect the positioning piece and the connecting rod.

10. The disassembly and inspection device according to any one of claims 1 to 6, characterized in that: The disassembly and inspection device also includes a support rod for supporting the positioning member; One end of the support rod is connected to the positioning member, and the other end of the support rod is used to abut against the oil pan of the diesel engine, so that the support rod generates a supporting force to support the positioning member upward.

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