Machining device for crankshaft thrust disc of marine diesel engine

Abstract

The utility model relates to the field of ship maintenance, in particular to a marine diesel engine crankshaft thrust disc machining device which comprises a crankshaft body, a mounting frame, a movable frame and a milling head, a fixing frame is arranged above the crankshaft body, the mounting frame is fixed to the lower end of the fixing frame, a rotating ring is fixed to the interior of the mounting frame, and the milling head is fixed to the lower end of the mounting frame. The rotating ring is rotationally connected with a main shaft of the crankshaft body, a height-adjustable moving frame is arranged on one side of the mounting frame, and a position-adjustable milling head is arranged at the lower end of the moving frame. According to the device, the surface of the crankshaft thrust disc can be quickly and conveniently milled by conveniently adjusting the positions of the X axis and the Z axis of the milling head, and the problems that an existing machining device for the crankshaft thrust disc of the marine diesel engine is short of an effective and convenient surface quick machining function, and consequently the machining device needs to be disassembled when being maintained; and a lot of time is wasted and loss can not be repaid.

Description

Technical Field

[0001] The utility model relates to the field of ship maintenance, in particular to a device for processing a crankshaft thrust plate of a marine diesel engine. Background Art

[0002] The crankshaft of a marine diesel engine is a vital component that connects the pistons and rotates other parts to achieve energy conversion. Typically made of high-strength alloy steel, it converts the reciprocating motion of the pistons into rotational motion, thereby driving the marine diesel engine. Marine crankshafts are typically large, making them difficult to disassemble and requiring repairs to be performed in situ.

[0003] After searching, the patent announcement number is CN208787564U, which discloses a crankshaft processing device, which relates to the field of crankshaft processing technology. The crankshaft processing device includes a crankshaft eccentric sleeve assembly and an adjustable eccentric center assembly. The crankshaft eccentric sleeve assembly includes an eccentric sleeve and a spline collet. The spline collet is embedded in the eccentric sleeve and is provided with a spline hole fixed to the crankshaft to be processed. The adjustable eccentric center assembly includes a rotary center and a linear slide assembly. The rotary center can be slidably arranged in the linear slide assembly and includes a center that cooperates with the crankshaft to be processed. The crankshaft processing device has the advantage of high positioning accuracy, and can process eccentric shaft segments with different phase angles, realize quick plugging and unplugging, and improve work efficiency.

[0004] In the existing technology, although the maintenance and repair effect of the crankshaft can be achieved during use, there is a defect: the existing marine diesel engine crankshaft thrust plate processing device lacks an effective and convenient surface rapid processing function, which results in the need to disassemble it when repairing it, wasting a lot of time, which is not worth the cost. In view of this, we propose a marine diesel engine crankshaft thrust plate processing device to solve the above problem. Utility Model Content

[0005] The purpose of the utility model is to solve the problems existing in the background technology and to provide a device for machining a crankshaft thrust plate of a marine diesel engine.

[0006] The technical solution of the utility model is as follows: a device for processing a crankshaft thrust plate of a marine diesel engine, comprising a crankshaft body, a mounting frame, a movable frame and a milling head, wherein a fixed frame is provided above the crankshaft body, a mounting frame is fixed to the lower end of the fixed frame, a rotating ring is fixed inside the mounting frame, and the rotating ring is rotatably connected to the main shaft of the crankshaft body, a height-adjustable movable frame is provided on one side of the mounting frame, and a position-adjustable milling head is provided at the lower end of the movable frame;

[0007] When the device is in use, the rotating ring can be rotatably installed on the crankshaft main shaft, and then the mounting bracket can be fixed on the outside of the rotating ring. The mounting bracket is fixed from the top of the crankshaft main body by using the fixing bracket. The hydraulic cylinder fixed on one side of the mounting bracket can drive the movable bracket to move up and down, and the motor one drives the rotating shaft one to drive the rotating shaft two to rotate. The rotating shaft two can be extended and retracted relative to the rotating shaft one, but can still rotate coaxially, so that the motor one drives the milling head to process the surface of the crankshaft disk. A screw rod is connected to one side of the motor two, so that the motor two can drive the moving block to move to one side to realize the feeding effect of the milling head. The device can achieve convenient crankshaft surface maintenance and processing effects, has the function of multi-point movement adjustment, and is highly practical.

[0008] Preferably, a mounting plate is fixed to an outer wall of one side of the mounting frame, a guide rail is provided above the mounting plate, and the guide rail is embedded and installed in the outer wall of one side of the mounting frame.

[0009] Preferably, a hydraulic cylinder is fixed to the lower end of the mounting plate, a hydraulic rod is plugged into the upper end of the hydraulic cylinder, the hydraulic rod is fixedly connected to the lower end of the movable frame, and the movable frame is movably plugged into the inside of the guide rail.

[0010] Preferably, a second motor is fixed to the outer wall of one side of the movable frame, a movable block is movably installed at the lower end of the movable frame, a screw rod is provided inside the movable block, the screw rod is rotatably connected to the second movable block, and the output shaft of the second motor is fixedly connected to the rotation center of one side of the screw rod.

[0011] Preferably, a motor 1 is fixed to the outer wall of one side of the movable frame, a rotating shaft 1 is provided on one side of the motor 1, a rotating shaft 2 is inserted on one side of the rotating shaft 1, a pin is inserted between the rotating shaft 1 and the rotating shaft 2, one end of the rotating shaft 2 is fixedly connected to the rotation center of one side of the milling head, and a limiting ring is fixed on one end of the rotating shaft 2, and the limiting ring is rotatably connected to the movable block.

[0012] Preferably, one side surface of the milling head is provided with protrusions distributed in a ring array.

[0013] Preferably, the upper end of the fixing bracket is fixedly connected to the lower end of the external maintenance beam bracket, and does not contact the crankshaft body.

[0014] Compared with the prior art, the advantages of the present invention are:

[0015] 1. This device can use a hydraulic cylinder to drive the movable frame to move up and down on one side of the mounting frame, which can realize the longitudinal displacement of the milling head and achieve all-round cutting processing of the crankshaft thrust plate. In addition, this device can use motor 2 to drive the movable block to feed to one side, which is convenient for adjusting the grinding depth of the crankshaft thrust plate.

[0016] 2. Based on beneficial effect 1, it has the following advantages:

[0017] 1. Marine diesel engine main engines are generally large and heavy. When a crankshaft problem requires repair, traditional methods require disassembling the main engine, drilling a process hole in the hull, lifting the crankshaft out of the engine room, and installing it on a machine tool for machining and repair. This requires significant manpower, financial resources, and time.

[0018] 2. For new processing equipment, there is no need to dismantle the main engine and hull to open process holes. It is only necessary to remove the parts around the thrust plate plane to meet the on-site installation requirements of the new equipment.

[0019] 3. During processing, turn on the main turning machine to make the crankshaft rotate evenly at a low speed. At the same time, the power motor drives the milling cutter to rotate at a high speed to perform milling on the plane surface of the thrust plate.

[0020] 4. On-site thrust plate surface processing only takes 7-10 days, which improves efficiency by 4-5 times and saves about 10 times the cost compared with traditional repair methods.

[0021] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0023] Figure 2 It is a partial cross-sectional schematic diagram of the utility model;

[0024] Figure 3 For the utility model Figure 2 A magnified schematic diagram of the structure in the middle;

[0025] Figure 4 This is a schematic diagram of the positions of the first and second rotating shafts of the present invention;

[0026] Figure 5 For the utility model Figure 4 A magnified schematic diagram of the structure B in the middle.

[0027] Reference numerals:

[0028] 1. Crankshaft body; 2. Fixed frame; 3. Mounting frame; 4. Guide rail; 5. Moving frame; 6. Hydraulic rod; 7. Hydraulic cylinder; 8. Rotating ring; 9. Mounting plate; 10. Motor 1; 11. Motor 2; 12. Milling head; 13. Moving block; 14. Screw; 15. Rotating shaft 1; 16. Latch; 17. Rotating shaft 2; 18. Limiting ring. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] Next, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, cross-sectional views of device structures may be partially enlarged and not to scale when describing the embodiments of the present invention. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, three-dimensional dimensions, including length, width, and depth, should be included.

[0032] In order to make the purpose, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0033] Example 1

[0034] See also Figure 1-Figure 5 As shown, this embodiment is a device for machining a crankshaft thrust plate of a marine diesel engine, comprising a crankshaft body 1, a mounting frame 3, a movable frame 5, and a milling head 12. A fixed frame 2 is provided above the crankshaft body 1, a mounting frame 3 is fixed to the lower end of the fixed frame 2, a rotating ring 8 is fixed inside the mounting frame 3, and the rotating ring 8 is rotatably connected to the main shaft of the crankshaft body 1. A height-adjustable movable frame 5 is provided on one side of the mounting frame 3, and a position-adjustable milling head 12 is provided at the lower end of the movable frame 5. The rotating ring 8 can be centered and split, and the crankshaft main shaft is wrapped by centered movement on both sides, and then fixed to the outer wall of the mounting frame 3 with screws;

[0035] When the present device is in use, the rotating ring 8 can be rotatably installed on the crankshaft main shaft, and then the mounting frame 3 can be fixed on the outside of the rotating ring 8. The mounting frame 3 is fixed from above the crankshaft main body 1 by the fixing frame 2. The hydraulic cylinder 7 fixed on one side of the mounting frame 3 can drive the movable frame 5 to move up and down, and the motor 10 drives the rotating shaft 15 to drive the rotating shaft 2 17 to rotate. The rotating shaft 2 17 can be extended and retracted relative to the rotating shaft 15, but can still rotate coaxially, so that the motor 10 drives the milling head 12 to process the crankshaft disk surface. A screw rod 14 is connected to one side of the motor 2 11, which can realize that the motor 2 11 drives the moving block 13 to move to one side, thereby realizing the feeding effect of the milling head 12. The present device can realize convenient crankshaft surface maintenance and processing effects, has the function of multi-point movement adjustment, and has high practicality.

[0036] Example 2

[0037] See also Figure 1-Figure 5As shown, this embodiment, based on embodiment 1, also includes: a mounting plate 9 is fixed to the outer wall of one side of the mounting frame 3, a guide rail 4 is provided above the mounting plate 9, and the guide rail 4 is embedded and installed on the outer wall of one side of the mounting frame 3. The guide rail 4 can ensure the height adjustment of the movable frame 5 in a stable vertical state on one side of the mounting frame 3, and the structure is compactly designed, and the operation is stable and accurate.

[0038] A hydraulic cylinder 7 is fixed to the lower end of the mounting plate 9, and a hydraulic rod 6 is connected to the upper end of the hydraulic cylinder 7. The hydraulic rod 6 is fixedly connected to the lower end of the movable frame 5, and the movable frame 5 is movably connected to the inside of the guide rail 4. The hydraulic cylinder 7 can drive the hydraulic rod 6 to drive the movable frame 5 to move up and down, so as to facilitate the adjustment of the Z-axis position of the milling head 12 so as to achieve the processing effect of various positions of the crankshaft disk.

[0039] A motor 2 11 is fixed to the outer wall of one side of the mobile frame 5, and a moving block 13 is movably installed at the lower end of the mobile frame 5. A screw rod 14 is provided inside the mobile block 13, and the screw rod 14 is rotatably connected to the mobile block 13. The output shaft of the motor 2 11 is fixedly connected to the rotation center of one side of the screw rod 14. The motor 2 11 can drive the screw rod 14 to rotate, thereby achieving the effect of adjusting the moving block 13 to move to one side. The moving block 13 is rotatably connected to the rotating shaft 2 17 through a limiting ring 18.

[0040] A motor 10 is fixed to the outer wall of one side of the movable frame 5, and a rotating shaft 15 is provided on one side of the motor 10. A rotating shaft 2 17 is inserted on one side of the rotating shaft 15, and a latch 16 is inserted between the rotating shaft 15 and the rotating shaft 2 17. One end of the rotating shaft 2 17 is fixedly connected to the rotation center of one side of the milling head 12, and a limiting ring 18 is fixed on one end of the rotating shaft 2 17. The limiting ring 18 is rotatably connected to the movable block 13. The latch 16 can be used to realize that the output of the rotating shaft 15 can drive the rotating shaft 2 17 to rotate, and the limiting ring 18 can realize that the movement of the movable block 13 drives the rotating shaft 2 17 to extend and retract inside the rotating shaft 15, and does not hinder the rotation of the rotating shaft 2 17 to drive the milling head 12 to rotate.

[0041] One side surface of the milling head 12 is provided with protrusions distributed in a ring array, and the protrusions can achieve the grinding effect of the milling head 12 on the surface of the crankshaft thrust plate on one side.

[0042] The upper end of the fixing bracket 2 is fixedly connected to the lower end of the external maintenance beam bracket, and it does not contact the crankshaft body 1. The fixing bracket 2 is used to support the position of the device at the upper end of the crankshaft body 1, and the fixing bracket 2 will not affect the low-speed rotation of the crankshaft body 1.

[0043] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0044] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A device for machining a crankshaft thrust plate of a marine diesel engine, comprising a crankshaft body (1), a mounting frame (3), a movable frame (5) and a milling head (12), characterized in that: A fixed frame (2) is provided above the crankshaft body (1), a mounting frame (3) is fixed at the lower end of the fixed frame (2), a rotating ring (8) is fixed inside the mounting frame (3), and the rotating ring (8) is rotatably connected to the main shaft of the crankshaft body (1), a height-adjustable movable frame (5) is provided on one side of the mounting frame (3), and a position-adjustable milling head (12) is provided at the lower end of the movable frame (5).

2. A marine diesel engine crankshaft thrust plate machining device according to claim 1, characterized in that: A mounting plate (9) is fixed to an outer wall of one side of the mounting frame (3), a guide rail (4) is provided above the mounting plate (9), and the guide rail (4) is embedded and mounted on an outer wall of one side of the mounting frame (3).

3. A marine diesel engine crankshaft thrust plate machining device according to claim 2, characterized in that: A hydraulic cylinder (7) is fixed to the lower end of the mounting plate (9), a hydraulic rod (6) is plugged into the upper end of the hydraulic cylinder (7), the hydraulic rod (6) is fixedly connected to the lower end of the movable frame (5), and the movable frame (5) is movably plugged into the interior of the guide rail (4).

4. The device for machining a crankshaft thrust plate of a marine diesel engine according to claim 1, characterized in that: A second motor (11) is fixed to the outer wall of one side of the movable frame (5), and a movable block (13) is movably installed at the lower end of the movable frame (5). A screw rod (14) is provided inside the movable block (13), and the screw rod (14) is rotatably connected to the second movable block (13). The output shaft of the second motor (11) is fixedly connected to the rotation center of one side of the screw rod (14).

5. The device for machining a crankshaft thrust plate of a marine diesel engine according to claim 1, characterized in that: A motor (10) is fixed on the outer wall of one side of the movable frame (5), a rotating shaft (15) is provided on one side of the motor (10), a rotating shaft (17) is inserted on one side of the rotating shaft (15), a latch (16) is inserted between the rotating shaft (15) and the rotating shaft (17), one end of the rotating shaft (17) is fixedly connected to the rotation center of one side of the milling head (12), and a limiting ring (18) is fixed on one end of the rotating shaft (17), and the limiting ring (18) is rotatably connected to the movable block (13).

6. The device for machining a crankshaft thrust plate of a marine diesel engine according to claim 1, characterized in that: One side surface of the milling head (12) is provided with protrusions distributed in a ring array.

7. The device for machining a crankshaft thrust plate of a marine diesel engine according to claim 1, characterized in that: The upper end of the fixing frame (2) is fixedly connected to the lower end of the external maintenance beam bracket and does not contact the crankshaft body (1).

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