Flexible automatic clamping tool and method for marine diesel engine body

Abstract

The present invention discloses a flexible automatic clamping tool and method for a marine diesel engine body. The tool determines the outer dimensions of the marine diesel engine body and the flip angle required for assembling a cylinder unit, and when the spacing of the flip pallet is adjusted to make the width of the engine body consistent, the engine body is hoisted to the top of the flip pallet and slowly placed downward. The rotary pallet is synchronously flipped 180 degrees, the crankshaft is hoisted, the flip device is flipped to an initial clamping position, the rotary pallet is flipped to the installation angle of the cylinder unit, the cylinder unit installation telescopic rod is locked in the current flip position, the cylinder unit is hoisted, the rotating cylinder unit installation telescopic rod is unlocked, the flip device is flipped to the installation position of the cylinder unit on the other side, and the cylinder unit is hoisted again. When all the cylinder units are hoisted, the flip device is flipped to the initial clamping position. The present invention can meet the assembly of crankshafts and cylinder units of marine diesel engines of various models, and can automatically clamp and flip at multiple angles, thereby improving the automation level and assembly efficiency of the assembly process.

Description

Technical Field

[0001] The invention belongs to the technical field of assembly of marine diesel engines, and in particular relates to a flexible automatic clamping method and tooling for a marine diesel engine body. Background Art

[0002] During the assembly process of a marine diesel engine, the crankshaft components and cylinder units must be installed on the engine body. Due to the large mass and size of the diesel engine body, it must be flipped at different angles and its position and posture must be adjusted multiple times during installation, making the entire assembly process cumbersome and highly risky. Currently, the lifting of marine diesel engine bodies mainly relies on manual operation, requiring operators to align the bolt holes on the diesel engine body and the mounting platform and tighten them with bolts. This is labor-intensive and has a low degree of automation. Existing flip platforms are mostly dedicated devices that can only support the installation of crankshaft components and cylinder units for one type of engine. They are less flexible and cannot meet the assembly mode of multiple series of engines.

[0003] The document with Chinese patent application number 202110388505.X discloses a fuselage flipping assembly device and operation method for a high-power marine diesel engine. By manually aligning the bolt holes on the engine body and the mounting platform, the angle steels on both sides of the lower end of the engine body are fixed to the mounting platform with engine foot bolts. The diesel engine body flipping device requires frequent tightening and loosening of the engine foot bolts, resulting in low assembly efficiency and high labor intensity.

[0004] Chinese patent application No. 201220731068.3 discloses a turning platform for the crankshaft of a medium-speed diesel engine main engine. The engine body and the bracket are connected by bolts, and then the engine body is hoisted into the turning platform by a crane. This device relies on manual locking, and the circular frame has large restrictions on the external dimensions of the engine body and low flexibility, which cannot meet the requirements of turning different series of engines. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems existing in the assembly process of the above-mentioned marine diesel engine, and to propose a flexible automated clamping tool and a clamping method for the marine diesel engine body that improves the degree of automation of the assembly process and is adaptable to the assembly operations of different series of diesel engine bodies.

[0006] Base comprises support, castor, and frame upper is provided with guide rail, and support and conveyer frames movable end contact site are provided with recoil spring or rubber cushion, and castor is arranged on the pin of base bottom four, to carry mobile handler location. The right horizontal telescopic rod can pass through the swivel support plate and extend into the telescopic rod hole of the movable bracket; the lower end of the swivel support plate is connected to the two sliders through a linear guide pair arranged horizontally in the front and rear, and a flip support plate is fixedly connected between the two sliders on the same side of the front and rear; a third motor and a screw nut pair arranged horizontally in the front and rear are provided at the bottom of the swivel support plate assembly surface, and the screw in the screw nut pair cooperates with the two screw nut support seats arranged in the front and rear, and the two screw nut support seats are each fixedly connected to one of the flip support plates; a guide shaft, a square guide block and a wedge-shaped guide block are arranged above each flip support plate, the square guide block and the wedge-shaped guide block limit the front and rear directions of the diesel engine body, the guide shaft cooperates with the engine foot bolt hole, and the square guide block and the wedge guide block are each provided with a clamping device that can be pressed on the engine foot plane.

[0007] In order to achieve the above-mentioned purpose, the technical solution of the clamping method of the flexible automatic clamping fixture for a marine diesel engine body comprises the following steps:

[0008] S1: Determine the overall dimensions of the marine diesel engine body and the tilting angle required for cylinder unit assembly;

[0009] S2: The mobile bracket moves up and down to adjust the height, the third motor starts, and when the spacing of the flip trays is adjusted to be consistent with the width of the machine body, the third motor is turned off;

[0010] S3: Rotate the clamping telescopic rod on the rotary support plate to extend and lock it. The marine diesel engine body is lifted to the top of the flip support plate and slowly lowered. The wedge-shaped guide block is first positioned, and the engine foot bolt hole is aligned with the guide shaft and inserted. The square guide block and the first flip support plate are positioned again. The marine diesel engine body is placed on the flip support plate, and the clamping device presses the engine foot plane.

[0011] S4: Rotate the clamping telescopic rod on the rotary pallet to retract and unlock it, start the second motor, turn the rotary pallet synchronously by 180 degrees, then turn off the second motor, rotate the crankshaft mounting telescopic rod to extend the crankshaft mounting telescopic rod to lock the current flipping position, hoist the crankshaft, and then rotate the crankshaft mounting telescopic rod in the opposite direction to unlock it, turn on the second motor again, flip the flip device 2 to the initial clamping position, and turn off the second motor;

[0012] S5: Start the second motor to flip the rotary pallet to the installation angle of the cylinder unit, turn off the second motor, rotate the telescopic rod for installing the cylinder unit, extend the telescopic rod for installing the cylinder unit to lock the current flip position, and hoist the cylinder unit; then rotate the telescopic rod for installing the cylinder unit in the opposite direction to unlock it, turn on the second motor again, flip the flip device to the installation position of the cylinder unit on the other side, and hoist the cylinder unit again. When all the cylinder units are hoisted, turn on the second motor, flip the flip device to the initial clamping position, and turn off the second motor;

[0013] S6: Rotate the clamping telescopic rod to extend it and lock it in the current position, release the clamping device, and lift it away from the marine diesel engine body.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] (1) The present invention makes up for the shortcomings of the traditional marine diesel engine body turning device. It adopts a fixed base, a movable bracket, a turning device and a clamping device, which can meet the assembly of crankshafts and cylinder units of marine diesel engines of various models. It is suitable for various models, automatic clamping and multi-angle turning, which greatly improves the automation level of the assembly process, reduces manual participation, gets rid of the traditional manual body clamping, greatly reduces the labor intensity of operators, realizes the automation of the entire process of body lifting, guiding, clamping and turning, improves the flexibility and automation level of the assembly process, and makes the body clamping and turning process flexible and orderly, and effectively improves the overall assembly efficiency.

[0016] (2) The present invention combines a screw-nut pair with a linear guide pair to adjust the width and height of the flip frame, thereby meeting the external dimension requirements of different machine models. The clamping device uses a quick-change pressure head to achieve rapid clamping of different machine feet.

[0017] (3) The flipping device has a self-locking function. After flipping to the assembly angle, the rotating shaft is rotated and the clamping shaft is screwed into the corresponding hole on the mobile bracket, which can lock the swivel support plate on the mobile bracket, making the machine body more stable and improving safety.

[0018] (4) There are wedge-shaped guide blocks and detachable guide shafts on the flip tray, so that the machine body can reach the designated position quickly and accurately during lifting, reducing manual alignment time and improving the lifting efficiency of the machine body.

[0019] (5) The clamping device uses a hydraulic jack as a power source to push the quick-change pressure head to quickly press the machine body, which greatly improves the degree of automation. The clamping device can also achieve self-locking, avoiding the situation where the pressure head is loosened due to damage to the hydraulic system, improving the safety of the system and ensuring the personal safety of the operator.

[0020] (6) The double quick-change pressure heads in the clamping device are arranged symmetrically and can float at a custom angle around the axis. The head adopts a universal design. When the straightness of the machine body and foot plane is poor, the pressure head can adaptively clamp, and the clamping force is more concentrated, so that the clamping device can quickly reach the clamping state, saving clamping time.

[0021] (7) During the assembly process of the machine body, the height of the movable bracket can be adjusted by the screw nut pair and the linear guide pair, eliminating the relative height between the operator and the machine body turning frame, which is in line with ergonomics and convenient for manual assembly operations.

[0022] (8) The diesel engine body is accurately placed on the flip pallet through the guide component, and automatically clamped by the clamping device. The flip is driven by the motor, and it can be locked when it reaches the specified angle for assembly. This ensures that the diesel engine body is guided, positioned, clamped and flipped continuously, improving the installation efficiency of the crankshaft and cylinder unit, and is suitable for the company's multi-series engine body assembly operations. The wedge-shaped guide block and the clamping device on the flip pallet are integrated, and the clamping device is embedded in the wedge-shaped guide block as a whole, saving space. The flip pallet panel is small and light in weight, and the overall burden of the device is reduced during flipping. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of a marine diesel engine body A1;

[0024] Figure 2 It is a structural diagram of a marine diesel engine body A2;

[0025] Figure 3 It is a structural diagram of a marine diesel engine body A3;

[0026] Figure 4 It is a schematic structural diagram of a crankshaft B1 to be installed on a marine diesel engine body A1;

[0027] Figure 5 It is a schematic structural diagram of the cylinder unit C1 to be installed on the marine diesel engine body A1;

[0028] Figure 6 This is a schematic structural diagram of the flexible automated clamping fixture for a marine diesel engine body according to the present invention;

[0029] Figure 7 yes Figure 6 Schematic diagram of the structure of the fixed base;

[0030] Figure 8 yes Figure 6 An enlarged schematic diagram of the partial assembly structure of the movable bracket and the fixed base;

[0031] Figure 9 yes Figure 6 An enlarged schematic diagram of the partial assembly structure of the movable bracket and the turning device;

[0032] Figure 10 yes Figure 9 Axonometric view of

[0033] Figure 11 yes Figure 10 Exploded and enlarged view of the middle telescopic rod;

[0034] Figure 12 yes Figure 10 An enlarged schematic diagram of the middle telescopic rod and the rotary support plate;

[0035] Figure 13 Required for installation of marine diesel engine body A1 Figure 12 A side view of the middle telescopic rod;

[0036] Figure 14 Required for installation of marine diesel engine body A2 Figure 12 A side view of the middle telescopic rod;

[0037] Figure 15 Required for installation of marine diesel engine body A3 Figure 12 A side view of the middle telescopic rod;

[0038] Figure 16 yes Figure 9 Schematic diagram of the structure of the middle flip pallet;

[0039] Figure 17 yes Figure 16 An enlarged schematic diagram of the structure of the guide shaft on the middle flip tray;

[0040] Figure 18 yes Figure 6 An enlarged schematic diagram of the structure of the middle clamping device;

[0041] Figure 19 yes Figure 18 An enlarged schematic diagram of the structure of the middle clamping rod group;

[0042] Figure 20 yes Figure 19 A magnified schematic diagram of the structure of the medium quick-change pressure head;

[0043] Figure 21 This is a schematic diagram of the working state of the clamping device clamping the marine diesel engine body A1;

[0044] Figure 22 This is a schematic diagram of the working state of the clamping device clamping the marine diesel engine body A2;

[0045] Figure 23 This is a schematic diagram of the working state of the clamping device clamping the marine diesel engine body A3;

[0046] Figure 24 This is a schematic diagram of a state where the clamping device is loosened from the marine diesel engine body A1;

[0047] Figure 25 This is a schematic diagram of the state of the marine diesel engine body A1 in the clamping position;

[0048] Figure 26 This is a schematic diagram of the state of the marine diesel engine body A2 in the clamping position;

[0049] Figure 27 This is a schematic diagram of the state of the marine diesel engine body A3 in the clamping position;

[0050] Figure 28 This is a schematic diagram of the state of the marine diesel engine body A1 when it is in the crankshaft installation position;

[0051] Figure 29 This is a schematic diagram of the state of the marine diesel engine body A2 when it is in the crankshaft installation position;

[0052] Figure 30 This is a schematic diagram of the state of the marine diesel engine body A3 when it is in the crankshaft installation position;

[0053] Figure 31 This is a schematic diagram of the state of the marine diesel engine body A1 when it is in the cylinder unit installation position;

[0054] Figure 32 This is a schematic diagram of the state of the marine diesel engine body A2 when it is in the cylinder unit installation position;

[0055] Figure 33 It is a schematic diagram of the state of the marine diesel engine body A3 when it is in the cylinder unit installation position.

[0056] In the figure: A1, A2, A3. Marine diesel engine body; B1, B2, B3. Crankshaft; C1, C2, C3. Cylinder unit;

[0057] A1-1. Machine foot; A1-2. Cylinder unit mounting hole; A1-3. Bolt hole; A2-1. Machine foot; A2-2. Cylinder unit mounting hole; A2-3. Bolt hole; A3-1. Machine foot; A3-2. Cylinder unit mounting hole; A3-3. Bolt hole;

[0058] 1. Fixed base; 2. Mobile bracket; 3. Flipping device; 4. Clamping device;

[0059] 2-1. Ball screw pair; 2-2. First motor; 2-3. Linear guide pair; 2-4. Support; 2-5. Support member;

[0060] 3-1. Worm and worm gear reducer; 3-2. Second motor; 3-3. Coupling; 3-4. Bearing housing; 3-5. Rotating shaft; 3-6. Flange; 3-7. Rotary support plate; 3-8. Telescopic rod; 3-9. Ball screw pair; 3-10. Ball screw support seat; 3-11. Linear guide pair; 3-12. Pin support seat; 3-13. Pin; 3-14. First flipping support plate; 3-15. Second flipping support plate;

[0061] 3-8. Telescopic rod; 3-8-1. Housing; 3-8-2. Spring; 3-8-3. Clamping shaft; 3-8-4. Grooved sleeve; 3-8-5. Pin; 3-8-6, 3-8-D1, 3-8-D2, 3-8-D3. Telescopic rod for rotary shaft cylinder unit installation; 3-8-D4. Telescopic rod for crankshaft installation; 3-8-D5. Telescopic rod in clamping state;

[0062] 3-14. First flipping support plate; 3-14-1. Square guide block; 3-14-2-E1, 3-14-2-E2, 3-14-2-E3. Guide shaft; 3-14-3. Wedge-shaped guide block;

[0063] 4-1. Hydraulic jack; 4-2. Guide sleeve; 4-3. Sleeve; 4-4. Clamping base; 4-5. Quick-change pressure head; 4-6. Clamping rod group; 4-7. Oil outlet pipe; 4-8. Oil inlet pipe;

[0064] 4-6. Clamping rod group; 4-6-1. Floating block; 4-6-2. Pressing block; 4-6-3. Pin; 4-6-4. First connecting rod; 4-6-5. Second connecting rod; 4-6-6. Ejector rod. Detailed implementation manners

[0065] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0066] See Figure 1-5 , which is the structural diagram of three different series of marine diesel engine blocks A1, A2, and A3. The overall structure is a "U" shape symmetrically arranged front and back, and it is the main assembly object of the present invention. Among them, Figure 1The illustrated marine diesel engine body A1 has engine feet A1-1 at its base, located symmetrically on both the front and rear sides. Footings A1-1 are provided with a plurality of bolt holes A1-3, evenly distributed along the left and right axial direction of the marine diesel engine body A1. The engine body A1 also has a plurality of cylinder unit mounting holes A1-2, located symmetrically on both the front and rear sides. Figure 2 The marine diesel engine body A2 shown has an engine foot A2-1 at the bottom. Similarly, the engine foot A2-1 has several bolt holes A2-3, and the body wall has several cylinder unit mounting holes A2-2. The cylinder unit mounting holes A2-2 are located on both the front and rear sides and are symmetrical. Figure 3 The marine diesel engine body A3 shown has an engine foot A3-1 at the bottom, with several bolt holes A3-3 on the engine foot A3-1, and several cylinder unit mounting holes A3-2 on the engine body wall. The cylinder unit mounting holes A3-2 are located on both the front and rear sides and are symmetrical.

[0067] Figure 3 The crankshaft B1 shown is intended to be installed in a U-shaped hole extending horizontally through the bottom of one of the marine diesel engine bodies A1, A2, or A3, with the U-shaped opening facing downward and the center axis of the crankshaft B1 collinear with the center axis of the U-shaped hole. The cylinder unit C1 is intended to be installed in one of the cylinder unit mounting holes A1-2, A2-2, or A3-2 in the wall of the marine diesel engine body A1, A2, or A3. There are multiple cylinder units C1, with one cylinder unit C1 installed in each cylinder unit mounting hole A1-2, A2-2, or A3-2.

[0068] During assembly, the crankshaft B1 and the cylinder unit C1 are components that need to be hoisted above the marine diesel engine bodies A1, A2, and A3. Since the present invention can meet the above-mentioned various marine diesel engine body assemblies, the assembly contents and clamping methods are the same, so the specific working method of the present invention is described below. Figure 1 The marine diesel engine body A1 shown is assembled as an example.

[0069] The main clamping method of the present invention for the marine diesel engine body A1 is to clamp the two engine feet A1-1. When the marine diesel engine body A1 is hoisted on the assembly tool of the present invention, the threaded holes A1-3 on the engine feet A1-1 are used for positioning.

[0070] When installing the crankshaft B1, the marine diesel engine body A1 needs to be turned 180 degrees so that the U-shaped opening of the left and right through U-shaped holes faces upward, and the crankshaft B1 is placed from above the bottom of the marine diesel engine body A1 before assembly.

[0071] When installing the cylinder unit C1, multiple cylinder units C1 need to be hoisted separately onto the multiple cylinder unit mounting holes A1-2 symmetrically arranged on the upper part of the marine diesel engine body A1. Since there are cylinder unit mounting holes A1-2 on both the front and rear sides of the marine diesel engine body A1, the marine diesel engine body A1 needs to be flipped twice in the same angle in the forward and reverse directions.

[0072] See also Figure 6 The flexible automated clamping fixture for a marine diesel engine body of the present invention comprises a fixed base 1, a movable bracket 2, a flipping device 3 and a clamping device 4. The fixed base 1 is placed horizontally on the ground to support the entire fixture. It is a structure that is symmetrical left and right and front and back along its center point. A movable bracket 2 perpendicular to the ground is fixedly connected to each of the left and right ends of the fixed base 1. The two movable brackets 2 are symmetrical with respect to the fixed base 1 and can move in the vertical direction. A flipping device 3 is connected to each mobile bracket 2. The two flipping devices 3 have the same structure and can move up and down with the mobile bracket 2. Each flipping device 3 is symmetrical front and back and is located in the middle of the mobile bracket 2. The two flipping devices 3 are arranged symmetrically left and right, and each flipping device 3 can rotate in the vertical plane around the central axis in the left and right directions.

[0073] See also Figure 7 The fixed base 1 is mainly welded from rectangular hollow steel sections, and the bottom is rectangular. Three columns are symmetrically arranged at the left and right ends. The three columns form a triangular structure and are perpendicular to the ground. They are used to connect the mobile bracket 2 so that the mobile bracket 2 can move up and down between the three columns.

[0074] See also Figure 8 Each movable bracket 2 includes a bracket 2-4, a screw-nut pair 2-1, and a first motor 2-2. The bracket 2-4 is generally rectangular and perpendicular to the ground. Its front and rear sides are parallel to the columns. Its side surfaces are slidably connected to the two columns on the fixed base 1 via a linear guide pair 2-3. The bracket 2-4 is connected to the nut on the screw-nut pair 2-1 via a support 2-5. The screw on the screw-nut pair 2-1 is connected to the first motor 2-2, forming a screw-nut mechanism. When the first motor 2-2 rotates forward and reverse, it drives the screw of the screw-nut pair 2-1 to rotate, causing the nut in the screw-nut pair 2-1 to move up and down in the vertical direction, driving the support 2-5 and the bracket 2-4 to move up and down, so that the bracket 2-4 can move up and down on the linear guide pair 2-3, realizing the height adjustment of the tilting device 3 connected to the bracket 2-4, thereby adapting to the assembly height of different models of marine diesel engine bodies when assembling different models of marine diesel engine bodies.

[0075] See also Figure 9 and Figure 10Each movable bracket 2 is connected to a tilting device 3, which moves up and down with the bracket 2-4. Each tilting device 3 comprises a second motor 3-2, a first rotating support plate 3-7, a telescopic rod 3-8, a first tilting support plate 3-14, and a second tilting support plate 3-15. The second motor 3-2 is vertically arranged and serves as the power source for the tilting device 3. Its housing is fixedly attached to the top of the bracket 2-4. Its output shaft is coaxially connected downward to a worm gear reducer 3-1. The worm gear reducer 3-1 reduces the high speed power of the second motor 3-2 and increases the output torque. The worm gear reducer 3-1 is coaxially connected to a coaxial rotating shaft 3-5 via horizontal couplings 3-3, transmitting power to the rotating shaft 3-5. The rotating shaft 3-5 is connected to and passes through a bearing seat 3-4 fixedly attached to the bracket 2-4. The output end of the rotating shaft 3-5 is fixedly connected to the rotating support plate 3-7 via a flange 3-6. The side of the swivel support 3-7 facing the bracket 2-4 is the back side, and the side facing away from the bracket 2-4 is the mounting surface. The mounting surface of the swivel support 3-7 is equipped with multiple telescopic rods 3-8 for controlling the self-locking and flipping motion. The telescopic rods 3-8 are arranged horizontally, perpendicular to the mounting surface of the first swivel support 3-7. The bracket 2-4 is provided with telescopic rod holes corresponding to the positions of the telescopic rods 3-8. The telescopic rods 3-8 can pass through the swivel support 3-7 and then extend into the telescopic rod holes of the mobile bracket 2, thereby securing and locking the swivel support 3-7.

[0076] The lower end of the rotary support plate 3-7 is provided with a linear guide pair 3-11 arranged horizontally along the front and back, and two front and rear sliding blocks are arranged on the linear guide pair 3-11. The two sliding blocks can slide against each other and move closer and apart.

[0077] A first flip tray 3-14 and a second flip tray 3-15 are connected between the left and right rotary trays 3-7. The first flip tray 3-14 and the second flip tray 3-15 have the same structure, are symmetrical front to back, and are arranged horizontally. A flip tray is fixedly connected between the two sliders on the front sides of the lower ends of the two rotary trays 3-7. In the present invention, the second flip tray 3-15 is fixedly connected between the two sliders on the front sides of the lower ends of the left and right rotary trays 3-7, and the first flip tray 3-14 is fixedly connected between the two sliders on the rear sides of the lower ends of the left and right rotary trays 3-7. Sufficient space is left between the front and back of the first flip tray 3-14 and the second flip tray 3-15. Therefore, when the two sliders on the lower ends of the left and right rotary trays 3-7 slide forward and backward to move closer together and separate, the first flip tray 3-14 and the second flip tray 3-15 are driven to move closer together and separate in the front-to-back center direction below the left and right rotary trays 3-7.

[0078] When the two second motors 3-2 on the left and right sides work simultaneously, the power is transmitted to the rotating shaft 3-5 through the worm gear reducer 3-1 and the coupling 3-3, so that the two left and right rotary pallets 3-7 and the parts connected to them, such as the first flip pallet 3-14, the second flip pallet 3-15, and the telescopic rod 3-8, also rotate synchronously, thereby realizing the flipping of the flipping device 3 at different specific angles.

[0079] A horizontally arranged third motor 3-16 and a screw-nut pair 3-9 are provided at the bottom of the assembly surface of the rotary pallet 3-7. The screw in the screw-nut pair 3-9 cooperates with the two screw-nut support seats 3-10 arranged front and back. The two screw-nut support seats 3-10 are respectively fixedly connected to the first flip pallet 3-14 and the second flip pallet 3-15. When the third motor 3-16 is working, the screw-nut pair 3-9 drives the first flip pallet 3-14 and the second flip pallet 3-15 to move forward and backward.

[0080] A width self-locking device is fixedly connected to both sides above the first flip support plate 3-14 and the second flip support plate 3-15. The width self-locking device consists of a pin support seat 3-12 and a pin 3-13. The pin support seat 3-12 is fixedly connected to the slider at the lower end of the rotary support plate 3-7. As the slider moves, the pin support seat 3-12 is fixedly connected to the upper surface of the first flip support plate 3-14 and the second flip support plate 3-15. It is welded from two hollow cylindrical steel pipes arranged in front and back and two steel plates arranged in left and right. Two horizontally arranged pins 3-13 can slide in the hollow cylindrical steel pipes of their respective corresponding pin support seats 3-12. A pin is provided on the circumferential surface of the pin 3-13, and a U-shaped groove with a diameter equivalent to the pin is provided on the circumference of the hollow cylindrical steel pipe. At the same time, a pin hole with the same diameter as each pin 3-13 is provided on the rotary support plate 3-7. When the third motor 3-16 is working, it drives the screw nut pair 3-9 to adjust the distance between the first flip pallet 3-14 and the second flip pallet 3-15. When the front-to-back distance between the flip pallet 3-14 and the second flip pallet 3-15 is consistent with the front-to-back width of the diesel engine body to be assembled, the third motor 3-16 is turned off, and then each pin 3-13 is manually inserted into the corresponding pin hole on the rotary pallet 3-7, and the pin 3-13 is rotated so that the pin on the pin 3-13 slides into the tail end of the U-shaped groove, so that the pin 3-13 cannot move axially along the hollow cylindrical steel pipe, and the pin 3-13 is fixed. The pin 3-13 cannot exit the pin hole on the rotary pallet 3-7, and the first flip pallet 3-14 and the second flip pallet 3-15 are fixedly locked on the rotary pallet 3-7 by the pin 3-13, realizing self-locking of width adjustment, and finally realizing the width adjustment function of the entire device.

[0081] See also Figure 11The structure of a single telescopic rod 3-8 shown in FIG. 3 is characterized by a cylindrical outer shell 3-8-1 with a stepped through hole in the center. A clamping shaft 3-8-3 and a spring 3-8-2 are disposed within the stepped through hole. The clamping shaft 3-8-3 is a stepped shaft, with one end (the right end) of the clamping shaft 3-8-3 and one end (the left end) of the rotating shaft 3-8-6 coaxially fixed and welded together. The spring 3-8-2 is sleeved onto the smaller outer surface of the left end of the clamping shaft 3-8-3. The clamping shaft 3-8-3 can slide within the small hole of the outer shell 3-8-1. The spring 3-8-2 is compressed or restored as the clamping shaft 3-8-3 slides left and right. A slotted sleeve 3-8-4 is sleeved onto the larger outer surface of the right end of the clamping shaft 3-8-3 and is fixed to the larger hole of the stepped through hole in the outer shell 3-8-1. A threaded groove is defined on the sidewall of sleeve 3-8-4, and a pin hole is defined on the left end of rotating shaft 3-8-6. Pin 3-8-5 fits into the pin hole and passes through the threaded groove on the sidewall of sleeve 3-8-4, allowing it to rotate along the threaded groove of sleeve 3-8-4. When telescopic rod 3-8 is in operation, rotating shaft 3-8-6 rotates forward, and pin 3-8-5 moves within the threaded groove of sleeve 3-8-4, continuously compressing spring 3-8-2 and causing the left end of clamping shaft 3-8-3 to extend axially out of the left end face of housing 3-8-1. When clamping shaft 3-8-3 rotates in the reverse direction, pin 3-8-5 moves back within the groove of sleeve 3-8-4, causing spring 3-8-2 to gradually return to its original position and the left end of clamping shaft 3-8-3 to retract axially back into housing 3-8-1.

[0082] See also Figure 12The swivel pallet 3-7 is assembled with three different marine diesel engine bodies A1, A2, and A3. When assembling these different marine diesel engine bodies, the swivel pallet 3-7 has different flip angles. To ensure self-locking at each flip angle during assembly, a telescopic rod 3-8 is installed at each flip angle, including telescopic rods 3-8-D1, 3-8-D2, 3-8-D3, 3-8-D4, and 3-8-D5. When the marine diesel engine body is flipped to the assembly angle, the clamping shaft 3-8-3 in the telescopic rod 3-8 corresponding to that angle is manually screwed into the corresponding clamping shaft hole on the side of the movable bracket 2-4, so that the swivel pallet 3-7 is fixedly locked to the bracket 2-4 by the clamping shaft 3-8-3. The telescopic rod 3-8 passes through the swivel support plate 3-7 and is fixedly connected to it. The length of the outer shell 3-8-1 of the telescopic rod 3-8 matches the thickness of the swivel support plate 3-7. The clamping angle is the tilting angle of the swivel support plate 3-7. The clamping angle of each diesel engine body A1, A2, and A3 is 0 degrees, and the mounting angle of the crankshaft B1 is 180 degrees. However, for the cylinder unit C1, the clamping angle of each diesel engine body A1, A2, and A3 is different. Therefore, when each diesel engine body A1, A2, A3 is in the initial clamping state, the telescopic rod 3-8-D5 is set in the middle of the rotary pallet 3-7; when the crankshaft B1 of each diesel engine body A1, A2, A3 is clamped, the telescopic rod 3-8-D4 is set in the middle of the top of the rotary pallet 3-7; when the cylinder unit C1 in the diesel engine body A1 is installed, the telescopic rod 3-8-D2 is symmetrically set in the middle of the rotary pallet 3-7; when the cylinder unit C1 in the diesel engine body A2 is installed, the telescopic rod 3-8-D1 is symmetrically set in the middle and upper part of the rotary pallet 3-7; when the cylinder unit C1 in the diesel engine body A3 is installed, the telescopic rod 3-8-D3 is symmetrically set in the middle and lower part of the rotary pallet 3-7.

[0083] See also Figure 13-15The figure shows the telescopic rod 3-8 required for self-locking when the tilting device 3 is tilted to various angles during the assembly of each diesel engine body A1, A2, and A3. The three diesel engine bodies A1, A2, and A3 use the same telescopic rod 3-8-D5 and telescopic rod 3-8-D4 for initial clamping and crankshaft B1 clamping. Due to the different installation angles of cylinder unit C1, the telescopic rods of cylinder unit C1 are also different. Before the diesel engine body is hoisted onto this assembly fixture, the tilting device 3 is not yet in operation, and the tilting angle is 0 degrees. That is, in the initial clamping state, the telescopic rod 3-8-D5 is extended and locked to achieve self-locking. When the crankshaft B1 is installed, the second motor 3-2 is activated, transmitting power to the rotating shaft 3-5 through the worm gear reducer 3-1 and the coupling 3-3, and then pushing the flip device 3 through the flange 3-6 to flip the marine diesel engine body A1, A2, and A3. The second motor 3-2 is turned off, and the corresponding telescopic rod 3-8-D4 is extended and locked to achieve self-locking. When the cylinder unit C1 is installed, the second motor 3-2 is activated, and the marine diesel engine body A1, A2, and A3 are flipped to the installation angle of the cylinder unit C1. The second motor 3-2 is turned off, as shown in FIG. Figure 13 The telescopic rod 3-8-D2 corresponding to the cylinder unit C1 of the diesel engine body A1 is extended and locked to achieve self-locking. Figure 14 The telescopic rod 3-8-D3 corresponding to the cylinder unit C1 of the diesel engine body A2 is extended and locked to achieve self-locking. Figure 15 The telescopic rod 3-8-D1 corresponding to the cylinder unit C1 of the diesel engine body A3 is extended and locked to achieve self-locking.

[0084] See also Figure 16The first flip support plate 3-14 shown is primarily welded from a rectangular hollow steel section. A width self-locking device for width adjustment is located at each of its upper and lower ends, comprising a pin support seat 3-12 and a pin 3-13. Three square guide blocks 3-14-1 are arranged in the upper and middle portions of the first flip support plate 3-14, symmetrically front to back. Each square guide block 3-14-1 is welded from a hollowed-out rectangular parallelepiped steel section. Four wedge-shaped guide blocks 3-14-3 are symmetrically arranged between the square guide blocks 3-14-1 and the width self-locking device. These square guide blocks 3-14-1 and the wedge-shaped guide blocks 3-14-3 can limit the front-to-back position of the marine diesel engine body when it is clamped. Each square guide block 3-14-1 and the wedge-shaped guide block 3-14-3 have grooves within them, each containing a clamping device 4. Six guide shafts are provided above the first flip support plate 3-14. The six guide shafts are divided into three groups along the left and right directions, namely guide shafts 3-14-2-E1, 3-14-2-E2, and 3-14-2-E3. Each group has two guide shafts, and the two guide shafts in each group are symmetrical front to back. Each group of guide shafts has a tapered shape with different external dimensions, and the maximum diameter is consistent with the engine foot bolt holes A1-3, A2-3, and A3-3 of the marine diesel engine body. Figure 17 As shown, the bottom of each guide shaft is threaded, corresponding to the specially designed threaded hole above the first flip support plate 3-14. Different guide shafts can be quickly and manually replaced according to different marine diesel engine bodies. Only two guide shafts are required for a single engine foot of a marine diesel engine body. Because the engine foot has multiple bolt holes with the same spacing between the bolt holes, the two guide shafts are positioned so that they align with a pair of symmetrical bolt holes on the engine foot. The left-right spacing between the two guide shafts is as large as possible, and the guide shafts do not interfere with other parts of the device. Three different specifications of guide shafts are provided according to three different marine diesel engine bodies. When the marine diesel engine body A1 is clamped, the guide shaft 3-14-2-E2 that is compatible with the marine diesel engine body A1 is manually replaced in advance, and the marine diesel engine body A1 is hoisted to the top of the first flip pallet 3-14 and the second flip pallet 3-15. During the slow placement process, the wedge-shaped guide block 3-14-3 is first used for preliminary positioning, and then the marine diesel engine body A1 foot bolt hole A1-3 is aligned with the guide shaft 3-14-2-E2 and placed, and the guide block 3-14-1 is further positioned with the first flip pallet 3-14 plate surface, and finally clamped by the clamping device 4 to achieve complete positioning, so that the marine diesel engine body A1 is accurately clamped.

[0085] See also Figure 18The clamping device 4 includes a clamping base 4-4, a hydraulic jack 4-1, a clamping rod group 4-6 and a quick-change pressure head 4-5. The power source comes from the hydraulic jack 4-1 fixedly connected below the first flip support plate 3-14, and pressure is supplied and released through the oil inlet pipe 4-8 and the oil outlet pipe 4-7. Above the first flip support plate 3-14, a clamping rod group 4-6 is fixedly connected to the inner groove of the square guide block 3-14-1 and the wedge-shaped guide block 3-14-3 through the clamping base 4-4. The clamping rod group 4-6 is connected to the hydraulic jack 4-1 and can be driven by the hydraulic jack 4-1 to clamp and loosen different marine diesel engine bodies to be assembled. The clamping rod group 4-6 is slidably connected to the quick-change pressure head 4-5, which can be quickly replaced according to different marine diesel engine bodies to be assembled. When the marine diesel engine body to be assembled is clamped, it is stably placed on the first flip pallet 3-14 and the second flip pallet 3-15, and the hydraulic jack 4-1 provides pressure, and the clamping rod group 4-6 moves, so that the quick-change pressure head 4-5 quickly presses the engine foot plane of the marine diesel engine body to be assembled, realizing automatic clamping of the body.

[0086] See also Figure 19-20 , Figure 19 The clamping rod group 4-6 is a bilaterally symmetrical structure, and the whole is connected by different rods. The clamping base 4-4 is fixedly connected to the upper surface of the first flip tray 3-14 by bolts, supporting the entire clamping rod group 4-6. The clamping block 4-6-2 is a T-shaped structure, which can rotate around the clamping base 4-4 through a hole-axis fit. Two first connecting rods 4-6-4 are symmetrically set on both sides of the middle part of the clamping block 4-6-2 using a hole-axis fit, so that the first connecting rod 4-6-4 can rotate around the clamping block 4-6-2. At the same time, two second connecting rods 4-6-5 are symmetrically set on the other end of the first connecting rod 4-6-4 using a hole-axis fit. The middle part of the two second connecting rods 4-6-5 is connected by an axis, and the upper end shaft hole of the top rod 4-6-6 passes through the axis and is located in the center of the axis. The second connecting rod 4-6-5 adopts a hole-axis fit and is rotatably connected to the clamping base 4-4. There is a cylindrical boss in the center of the head of the clamping block 4-6-2. The floating block 4-6-1 with a through hole can rotate around the cylindrical boss with the help of bearings, retaining rings, etc. The maximum rotation angle of the floating block 4-6-1 can be limited by changing the distance between the two pins 4-6-3 on the clamping block 4-6-2. Figure 20, a T-shaped groove is opened below the pressing block 4-6-2. The T-shaped head of the quick-change punch 4-5 can slide in the T-shaped groove of the pressing block 4-6-2, enabling the quick installation and disassembly of the quick-change punch 4-5 to meet different series of marine diesel engine blocks to be assembled. The large cylindrical punch at the bottom of the quick-change punch 4-5 adopts a universal design. When the straightness of the foot plane of the marine diesel engine block to be assembled is poor, the quick-change punch 4-5 can adaptively press, enabling the clamping device 4 to quickly clamp. When the clamping rod group 4-6 clamps, the hydraulic jack 4-1 pushes the ejector rod 4-6-6 upward, pushing the second connecting rod 4-6-5 to rotate around the clamping base 4-4, further pushing the first connecting rod 4-6-4 to rotate around the axis, causing the pressing block 4-6-2 to rotate downward around the clamping base 4-4. The floating design of the floating block 4-6-1 and the universal design of the quick-change punch 4-5 can quickly adapt to the foot plane of the block to be assembled, enabling the clamping device 4 to achieve quick clamping. When the clamping device 4 clamps the block, the clamping rod group 4-6 has been pressed down a certain distance. The connecting shaft of the first connecting rod 4-6-4 slides into the top groove of the pressing block 4-6-2, and the clamping rod group is self-locked. When the pressing block 4-6-2 is subjected to a force in the reverse direction of pressing, the pressing block 4-6-2 cannot rotate in the reverse direction, and the quick-change punch 4-5 cannot be loosened, firmly clamping the block on the first flipping support plate 3-14. When the clamping rod group 4-6 needs to be loosened, the hydraulic jack 4-1 is depressurized, pulling the ejector rod 4-6-6 downward,带动 the second connecting rod 4-6-5 and the first connecting rod 4-6-4 to rotate in the reverse direction around the axis, finally lifting the quick-change punch 4-5, loosening the clamping rod group 4-6. After the hydraulic jack 4-1 is completely depressurized, the clamping rod group 4-6 has completely hidden in the groove of the wedge-shaped guide 3-14-3, waiting for the assembled marine diesel engine block to be lifted off.

[0087] See Figure 21-23 , which are the clamping states of three marine diesel engine blocks by the clamping device 4 respectively. The sides of the diesel engine blocks A1, A2, and A3 are in a "Ji" shape. The clamping principle is to quickly press the feet of the block through the automatic clamping device 4 to meet the clamping standard. Due to the different thicknesses of the feet of different blocks, different blocks can be clamped by replacing the quick-change punch. When the marine diesel engine block 1 to be assembled is clamped, the quick-change punch 4-5-F1 adapted to it is replaced in advance. After the marine diesel engine block A1 is placed on the first flipping support plate 3-14 and the second flipping support plate 3-15, the hydraulic jack 4-1 supplies pressure, driving the clamping rod group 4-6 to act, enabling multiple quick-change punches 4-5-F1 to contact the upper surface of the feet of the marine diesel engine block A1, quickly pressing the marine diesel engine block A1.

[0088] See Figure 24, shows the state where the clamping device 4 is released after the marine diesel engine body A1 is assembled. After the body is assembled, the hydraulic jack 4-1 is depressurized, the hydraulic oil flows out along the oil outlet pipe 4-7, the clamping rod assembly 4-6 is released, and the quick-change pressure head 4-5-F1 and the clamping rod assembly 4-6 are completely hidden inside the wedge-shaped guide block 3-14-3, waiting for the assembled marine diesel engine body A1 to be lifted off.

[0089] See also Figure 25-27 , respectively, are the states of marine diesel engine bodies A1, A2, and A3 in the clamping position. Due to the large differences in the external dimensions and weights of different marine diesel engine bodies, the number of clamping rod groups used for different marine diesel engine bodies is different. If the clamping rod group on the flip pallet on one side is taken as the standard, marine diesel engine body A1 requires 4 sets of clamping rod groups for clamping on one side, marine diesel engine body A2 requires 5 sets of clamping rod groups for clamping on one side, and marine diesel engine body A3 requires 7 sets of clamping rod groups for clamping on one side. Taking the clamping of marine diesel engine body A1 as an example, before hoisting marine diesel engine body A1, according to the external dimensions of marine diesel engine body A1, the first motor 2-2 is started to drive the movable bracket 2 to move up and down on the column of the fixed base 1 to adjust the height. After the adjustment is completed, the first motor 2-2 is turned off. The third motor 3-16 starts and drives the screw nut pair 3-9 to adjust the distance between the first flip pallet 3-14 and the second flip pallet 3-15. When the distance is consistent with the width of the marine diesel engine body to be assembled, the third motor 3-16 is turned off, and each pin shaft 3-13 is manually inserted into the pin shaft hole on the rotary pallet 3-7 and rotated to self-lock for width adjustment. Manually replace the quick-change pressure head 4-5-F1 that is compatible with the marine diesel engine body A1; when the marine diesel engine body A1 is hoisted, the square guide block 3-14-1, guide shaft 4-5-E1 and wedge-shaped guide block 3-14-3 guide it so that it is correctly placed on the first flip pallet 3-14 and the second flip pallet 3-15. The hydraulic jack 4-1 provides pressure, and a total of 8 groups of clamping devices 4 on the two flip pallets start to move, and the clamping rod group 4-6 moves to make the quick-change pressure head The head 4-5-F1 quickly clamps the engine foot plane of the marine diesel engine body A1, waiting for the next flipping action; after the marine diesel engine body A1 is assembled, the hydraulic jack 4-1 is depressurized, a total of 8 groups of clamping devices 4 on the two flipping pallets 3-14 and 3-15 are actuated, the clamping rod group 4-6 is actuated, and the quick-change pressure head 4-5-F1 is quickly loosened and finally completely hidden in the groove of the wedge-shaped guide block 3-14-3, waiting for the assembled marine diesel engine body A1 to be lifted off.

[0090] See also Figures 28-30, respectively, marine diesel engine bodies A1, A2, and A3 are in the crankshaft B1, B2, and B3 assembly positions. Taking the assembly of crankshaft B1 with marine diesel engine body A1 as an example, after marine diesel engine body A1 is correctly clamped to the first flip pallet 3-14 and the second flip pallet 3-15, the second motor 3-2 is started, driving the two rotary pallets 3-7 to flip, and marine diesel engine body A1 also flips the same angle. When the flip device 2 flips 180 degrees, the second motor 3-2 is turned off, and the telescopic rods 3-8-D4 corresponding to the crankshaft B1 on the two rotary pallets 3-7 are manually rotated to extend the telescopic rods 3-8-D4 to lock the current flip position, waiting for the crankshaft B1 to be hoisted. After the crankshaft B1 is hoisted, manually rotate the telescopic rod 3-8-D4 on the rotary support plates 3-7 at both ends in the opposite direction, retract the telescopic rod 3-8-D4 to unlock the current flip position, turn on the second motor 3-2 again, and the flip device 2 flips to the initial clamping position. The second motor 3-2 is turned off and waits for the next operation.

[0091] refer to Figures 31-33 , showing the marine diesel engine bodies A1, A2, and A3 in the assembly positions of cylinder units C1, C2, and C3, respectively. Taking the assembly of cylinder unit C1 on marine diesel engine body A1 as an example, after the crankshaft B1 of marine diesel engine body A1 is installed, the second motor 3-2 is started, driving the rotary support plates 3-7 at both ends to flip, and diesel engine body A1 also flips to the same angle. When the flipping device 2 flips to the cylinder unit installation angle of marine diesel engine body A1, the second motor 3-2 is turned off, and the telescopic rods 3-8-D2 corresponding to cylinder unit C1 on the two rotary support plates 3-7 are manually rotated to extend the telescopic rods 3-8-D2 to lock the current flip position, waiting for the cylinder unit C1 to be hoisted. After the cylinder unit C1 on one side is fully installed, manually rotate the corresponding telescopic rods 3-8-D2 of the cylinder unit C1 on the two rotating pallets 3-7 in the opposite direction. The telescopic rods 3-8-D2 retract and unlock the current flip position. Then, turn on the second motor 3-2 again, and flip the flip device 2 to the installation position of the cylinder unit on the other side. The cylinder unit is then hoisted in the same manner as described above. When the cylinder units on both sides are fully installed, the second motor 3-2 drives the flip device 2 back to the clamping position. The second motor 3-2 is turned off, and the crankshaft B1 and cylinder unit C1 are installed. The clamping device 4 is released, and the engine body A1 is ready for lifting.

[0092] The flexible automatic clamping method for a marine diesel engine body provided by the present invention takes the installation of a crankshaft B1 and a cylinder unit C1 on a marine diesel engine body A1 as an example. The main process is as follows:

[0093] S1, determine the model of the marine diesel engine body A1 to be assembled: record the length, width, height and other external dimensions of the marine diesel engine body A1 and the turning angle required for assembly of the cylinder unit B1;

[0094] S2, preparation for hoisting the marine diesel engine body A1: Based on the height of the engine body, the first motor 2-2 is started to drive the screw in the screw-nut pair 2-1 to rotate, so that the nut in the screw-nut pair 2-1 moves up and down in the vertical direction. The support 2-5 transmits the power from the nut to the bracket 2-4, pushing the bracket 2-4 to move up and down on the linear guide pair 2-3 and adjust it to a specific height. The first motor 2-2 is turned off to achieve height adjustment; based on the width of the engine body, the third motor 3-16 is started to drive the screw-nut pair 3-9 to adjust The first flip support plate 3-14 and the second flip support plate 3-15 are spaced apart. When the spacing is consistent with the width of the engine body, the third motor 3-16 is turned off, and each pin shaft 3-13 is manually inserted into the pin shaft hole on the rotary support plate 3-7 and the pin shaft 3-13 is rotated to self-lock to achieve width adjustment; the guide shaft 3-14-2-E2 adapted to the marine diesel engine body A1 to be assembled is manually installed on the first flip support plate 3-14 and the second flip support plate 3-15; the quick-change pressure head 4-5-F1 adapted to the marine diesel engine body A1 to be assembled is manually installed on the clamping device 4;

[0095] S3, hoisting of the marine diesel engine body A1: manually rotate the clamping telescopic rods 3-8-D5 on the two rotary support plates 3-7 to extend the clamping telescopic rods 3-8-D5 and lock them in the current position. The marine diesel engine body A1 is lifted to the top of the first flip pallet 3-14 and the second flip pallet 3-15. During the slow placement process, it is first preliminarily positioned by the wedge-shaped guide block 3-14-3. Then the engine foot bolt hole A1-1 of the marine diesel engine body A1 is aligned with the guide shaft 3-14-2-E2 and placed. The square guide block 3-14-1 and the first flip pallet 3-14 plate surface are further re-positioned. The marine diesel engine body A1 is stably placed above the first flip pallet 3-14 and the second flip pallet 3-15. Finally, oil is supplied to the oil inlet pipe 4-8 to supply pressure to the hydraulic jack 4-1, which pushes the clamping rod group 4-6 to move, so that the quick-change pressure head 4-5-F1 quickly presses the engine foot plane A1-1 of the marine diesel engine body A1 to be assembled. The marine diesel engine body A1 to be assembled is fully positioned and clamped.

[0096] S4, Crankshaft B1 Installation: Manually rotate the telescopic clamping rods 3-8-D5 on the two rotating pallets 3-7 to retract and unlock the current position. Start the second motor 3-2, which transmits power to the rotating shaft 3-5 via the worm gear reducer 3-1 and coupling 3-3, causing the rotating pallet 3-7, the second rotating pallet, and the intermediate components to synchronously flip 180 degrees. Turn the marine diesel engine body A1 upside down, turn off the second motor 3-2, and manually rotate the crankshaft mounting telescopic rods 3-8-D4 on the two rotating pallets 3-7 to extend and lock the current flip position. Wait for crankshaft B1 to be hoisted. After the crankshaft B1 is hoisted, manually rotate the crankshaft installation telescopic rod 3-8-D4 on the two rotary pallets 3-7 in the opposite direction, and the crankshaft installation telescopic rod 3-8-D4 retracts to unlock the current flip position. Turn on the second motor 3-2 again, and the flip device 2 flips to the initial clamping position. At this time, the marine diesel engine body A1 is upright, and then turn off the second motor 3-2. The crankshaft B1 is installed and waits for the next step.

[0097] S5, installation of cylinder unit C1: The second motor 3-2 is started, and power is transmitted to the rotating shaft 3-5 through the worm gear reducer 3-1 and the coupling 3-3, causing the two rotating pallets 3-7 and the parts between them to synchronously flip to the cylinder unit installation angle of the marine diesel engine body A1. The second motor 3-2 is then turned off, and the cylinder unit installation telescopic rods 3-8-D2 on the two rotating pallets 3-7 are manually rotated to extend the cylinder unit installation telescopic rods 3-8-D2 to lock the current flip position, waiting for the cylinder unit C1 to be hoisted. After the cylinder unit C1 on one side is completely hoisted, the cylinder unit installation telescopic rods 3-8-D2 on the two rotating pallets 3-7 are manually rotated in the opposite direction to retract the cylinder unit installation telescopic rods 3-8-D2 to unlock the current flip position. The second motor 3-2 is turned on again, and the flipping device 2 flips to the cylinder unit installation position on the other side. The cylinder unit C1 is hoisted in the same manner as above. After all cylinder units on both sides are hoisted, the second motor 3-2 is turned on, the turning device 2 is turned to the initial clamping position, and then the second motor 3-2 is turned off. The cylinder unit C1 is installed and waits for the next step.

[0098] S6, Lifting Marine Diesel Engine Body A1: Manually rotate the telescopic clamping rods 3-8-D5 on the two rotating pallets 3-7 until they extend and lock in their current position. Drain the oil from the oil outlet pipe 4-7 and relieve the pressure from the hydraulic jack 4-1. This pulls the push rod 4-6-6 downward, causing the second connecting rod 4-6-5 to rotate in opposite directions relative to the first connecting rod 4-6-4. This ultimately lifts the quick-change ram 4-5-F1, loosens the clamping rod assembly 4-6, and allows the assembled marine diesel engine body A1 to be lifted.

Claims

1. A flexible automatic clamping fixture for a marine diesel engine body, comprising a fixed base (1) and a movable bracket (2), wherein the left and right ends of the fixed base (1) are each fixedly connected to a movable bracket (2) perpendicular to the ground, and wherein: The two movable brackets (2) are symmetrical with respect to the fixed base (1) and can move in the vertical direction; each movable bracket (2) is connected to a flip device (3); the two flip devices (3) have the same structure and are arranged symmetrically, and can move up and down with the movable bracket (2); each flip device (3) can rotate around a horizontal central axis in the left and right directions; each flip device (3) comprises a second motor (3-2), a rotary support plate (3-7), a telescopic rod (3-8), a first flip support plate (3-14) and a second flip support plate (3-15); the second motor (3-2) is fixedly connected to the rotary support plate (3-7) via a rotating shaft (3-5); a plurality of left and right horizontal telescopic rods (3-8) for mounting a crankshaft and a cylinder unit are arranged on the assembly surface of the rotary support plate (3-7); the telescopic rods (3-8) can pass through the rotary support plate (3-7) and extend into the telescopic rod holes of the movable bracket (2); the lower end of the rotary support plate (3-7) is connected to the rotary support plate (3-14) by a linear guide pair (3-11) arranged horizontally in front and back directions Two sliders, a flip support plate (3-14, 3-15) is fixedly connected between the two sliders on the same side of the front and rear sides; a third motor (3-16) and a screw nut pair (3-9) arranged horizontally in the front and rear sides are provided at the bottom of the assembly surface of the rotary support plate (3-7); the screw in the screw nut pair (3-9) cooperates with two screw nut support seats (3-10) arranged in the front and rear sides, and the two screw nut support seats (3-10) are respectively fixedly connected to one of the flip support plates (3-14, 3-15). 15); A guide shaft, a square guide block (3-14-1) and a wedge-shaped guide block (3-14-3) are arranged above each flip support plate (3-14, 3-15); the square guide block (3-14-1) and the wedge-shaped guide block (3-14-3) limit the front and rear directions of the diesel engine body; the guide shaft matches the engine foot bolt hole of the diesel engine body; the square guide block (3-14-1) and the wedge-shaped guide block (3-14-3) are each provided with a clamping device (4) that can be pressed against the engine foot plane.

2. The flexible automatic clamping fixture for a marine diesel engine body according to claim 1 is characterized by: The bottom of the fixed base (1) is rectangular, and three vertical columns are symmetrically provided at the left and right ends thereof, and the three columns form a triangular structure. The bracket in each movable bracket (2) is a vertical rectangular parallelepiped, and the front and rear sides of the bracket are slidably connected to the two columns through a linear guide pair (2-3). The bracket is connected to the nut on the screw nut pair (2-1) through a support member (2-5), and the screw on the screw nut pair (2-1) is connected to the first motor (2-2).

3. The flexible automatic clamping fixture for a marine diesel engine body according to claim 1 is characterized by: The output shaft of the second motor (3-2) is coaxially connected to the worm gear reducer (3-1), and the worm gear reducer (3-1) is coaxially connected to the coaxial rotating shaft (3-5) via left and right horizontal couplings (3-3).

4. The flexible automatic clamping fixture for marine diesel engine body according to claim 1 is characterized by: A width self-locking device consisting of a pin support seat (3-12) and a pin (3-13) is fixedly connected to both sides of the upper side of the supporting plates (3-14, 3-15). The pin support seat (3-12) is fixedly connected to the slider at the lower end of the rotary supporting plate (3-7). The pin support seat (3-12) is fixedly connected to the upper surface of the flip supporting plates (3-14, 3-15). Two pins (3-13) arranged horizontally on the left and right can slide in their respective corresponding pin support seats (3-12). A pin is provided on the circumferential surface of the pin (3-13). The rotary supporting plate (3-7) is provided with a pin hole with the same diameter as each pin (3-13), and the pin (3-13) can be inserted into the pin hole.

5. The flexible automatic clamping fixture for a marine diesel engine body according to claim 1 is characterized by: The exterior of a single telescopic rod (3-8) is a cylindrical shell (3-8-1), the interior of the shell (3-8-1) is a stepped through hole, a clamping shaft (3-8-3) and a spring (3-8-2) are arranged in the stepped through hole, the clamping shaft (3-8-3) is a stepped shaft, the clamping shaft (3-8-3) is coaxially fixed with the rotating shaft (3-8-6), the spring (3-8-2) is sleeved on the small-diameter outer circumference of the clamping shaft (3-8-3), the groove sleeve (3-8-4) is sleeved on the large-diameter outer circumference of the clamping shaft (3-8-3) and is fixed on the large hole of the stepped through hole of the shell (3-8-1), and a screw is opened on the side wall of the groove sleeve (3-8-4). The left end of the rotating shaft (3-8-6) is provided with a pin hole, and the pin (3-8-5) passes through the threaded groove on the side wall of the groove sleeve (3-8-4) and is assembled with the pin hole. When the rotating shaft (3-8-6) is rotated in the forward direction, the pin (3-8-5) moves in the threaded groove of the groove sleeve (3-8-4) and compresses the spring (3-8-2), and the clamping shaft (3-8-3) extends out of the housing (3-8-1). When the clamping shaft (3-8-3) is rotated in the reverse direction, the pin (3-8-5) moves back in the groove sleeve (3-8-4), the spring (3-8-2) recovers, and the clamping shaft (3-8-3) retracts into the housing (3-8-1).

6. The flexible automatic clamping fixture for a marine diesel engine body according to claim 1 is characterized by: The telescopic rod (3-8-D5) for clamping is arranged in the middle of the rotary support plate (3-7), the telescopic rod (3-8-D4) for crankshaft installation is arranged in the middle of the top of the rotary support plate (3-7), and the telescopic rod (3-8-D2) for cylinder unit installation is symmetrically arranged in the middle, upper middle, or lower middle of the rotary support plate (3-7).

7. The flexible automatic clamping fixture for a marine diesel engine body according to claim 1 is characterized by: The clamping device (4) includes a clamping base (4-4), a hydraulic jack (4-1), a clamping rod group (4-6) and a quick-change pressure head (4-5). The hydraulic jacks (4-1) are fixedly connected below the flip support plates (3-14, 3-15). The clamping rod group (4-6) is fixedly connected in the inner groove of the square guide block (3-14-1) and the wedge-shaped guide block (3-14-3) through the clamping base (4-4). The clamping rod group (4-6) is connected to the hydraulic jack (4-1). The clamping rod group (4-6) is slidably connected to the quick-change pressure head (4-5). When the hydraulic jack (4-1) supplies pressure, the clamping rod group (4-6) moves, and the quick-change pressure head (4-5) presses the machine foot plane.

8. The flexible automatic clamping fixture for a marine diesel engine body according to claim 7 is characterized by: The clamping rod group (4-6) is symmetrical on both sides, and the pressing block (4-6-2) is a T-shaped structure and rotates around the clamping base (4-4).

9. The flexible automatic clamping fixture for a marine diesel engine body according to claim 8 is characterized by: Two first connecting rods (4-6-4) are symmetrically arranged on both sides of the middle of the clamping block (4-6-2) by using a hole-axis fit. The first connecting rod (4-6-4) rotates around the clamping block (4-6-2). Two second connecting rods (4-6-5) are symmetrically arranged on the first connecting rod (4-6-4) by using a hole-axis fit. The middle parts of the two second connecting rods (4-6-5) are connected by a shaft. The shaft hole at the upper end of the top rod (4-6-6) passes through the shaft and is located at the center of the shaft. The second connecting rod (4-6-5) is rotatably connected to the clamping base (4-4).

10. A clamping method using the flexible automatic clamping fixture for a marine diesel engine body according to claim 6, characterized in that The following steps are involved: S1: Determine the overall dimensions of the marine diesel engine body and the tilting angle required for cylinder unit assembly; S2: The movable bracket (2) moves up and down to adjust the height, the third motor (3-16) is started, and when the spacing between the flip support plates (3-14, 3-15) is adjusted to be consistent with the width of the machine body, the third motor (3-16) is turned off; S3: The clamping telescopic rod (3-8-D5) on the rotary support plate 3-7 is rotated to extend the clamping telescopic rod (3-8-D5) and locked. The marine diesel engine body is lifted to the top of the flip support plates (3-14, 3-15) and slowly lowered. The wedge-shaped guide block (3-14-3) is first positioned, and the engine foot bolt hole is aligned with the guide shaft and inserted. The square guide block (3-14-1) and the first flip support plate (3-14) are positioned again. The marine diesel engine body is placed above the flip support plates (3-14, 3-15), and the clamping device (4) presses the engine foot plane. S4: Rotate the telescopic rod (3-8-D5) for clamping on the rotary support plate (3-7) to retract and unlock the clamping telescopic rod (3-8-D5), start the second motor (3-2), and after the rotary support plate (3-7) is synchronously flipped 180 degrees, the second motor (3-2) is turned off, and the telescopic rod (3-8-D4) for crankshaft installation is rotated to extend the crankshaft installation telescopic rod (3-8-D4) to lock the current flip position, and then hoist the crankshaft. Then, rotate the crankshaft installation telescopic rod (3-8-D4) in the opposite direction to unlock it, and start the second motor (3-2) again. The flip device (3) flips to the initial clamping position, and the second motor (3-2) is turned off; S5: Start the second motor (3-2) to flip the rotary support plate (3-7) to the installation angle of the cylinder unit, turn off the second motor (3-2), rotate the telescopic rod (3-8-D2) for installing the cylinder unit, extend the telescopic rod (3-8-D2) for installing the cylinder unit to lock the current flip position, and hoist the cylinder unit; then rotate the telescopic rod (3-8-D2) for installing the cylinder unit in the opposite direction to unlock it, turn on the second motor (3-2) again, flip the flip device (3) to the installation position of the cylinder unit on the other side, and hoist the cylinder unit again. When all the cylinder units are hoisted, turn on the second motor (3-2), flip the flip device (3) to the initial clamping position, and turn off the second motor (3-2); S6: Rotate the telescopic rod (3-8-D5) for clamping, so that the clamping telescopic rod (3-8-D5) extends and locks the current position, releases the clamping device (4), and lifts it away from the marine diesel engine body.

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