A marine crankshaft red sleeve position adjusting device and method

Abstract

The application provides a marine crankshaft red sleeve position adjusting device and method, and relates to the technical field of marine crankshaft assembly. The device comprises an adjusting rod, a counterweight frame which is detachably and slidably arranged on the adjusting rod, and a counterweight block which is detachably installed on the counterweight frame. A lifting rod is further arranged on the adjusting rod. A plurality of adjusting holes extending upward and downward are formed on the adjusting rod. A lifting rod is arranged in each adjusting hole. The lifting rod is used for installing a crank and shaft assembly. A clamping gap for clamping the crank and shaft assembly is formed between the lifting rod and the adjusting rod. The lifting rod is installed by selecting force arm adjusting holes at different positions. The length of the force arm can be changed to adapt to different specifications of the assembly and accurately adjust the posture of the assembly. The counterweight frame is detachable, which can be quickly disassembled, transported and stored. When different specifications or types of adjusting rods are needed, the counterweight body is disassembled and installed on a new adjusting rod to realize the interchangeable use of the counterweight body between different adjusting rods.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of marine crankshaft assembly, in particular to a marine crankshaft red sleeve position adjusting device and method. BACKGROUND

[0002] The marine crankshaft red sleeve is a key component for the marine engine crankshaft, which is made of a ring-shaped metal sleeve of high-strength wear-resistant alloy material such as chromium molybdenum alloy steel, with an inner diameter matching the crankshaft journal and an outer diameter determined by design, and a relatively thin thickness. It is heated and expanded by the shrink fit process and then fitted on the crankshaft journal, and after cooling and shrinking, it forms an interference fit. Its main function is to protect the crankshaft journal, enhance its wear resistance, corrosion resistance and strength and hardness, reduce wear and fatigue damage, and prolong the service life of the crankshaft. It also plays a sealing role to prevent lubricating oil leakage and ensure normal lubrication and cooling of the engine.

[0003] The marine semi-combined crankshaft is assembled by interference fit of components similar to building blocks. After single assembly, the weight is 9 to 55 tons, and it needs to be assembled into another component hole with a depth of 220 to 430 mm. In order to ensure accuracy during installation, the center line of the assembly is made vertical to the horizontal plane by using a crane to lift the assembly, with an error of less than 0.05 mm per meter. The operation is difficult, and any slight shaking during lifting will result in installation failure.

[0004] In addition, in the existing marine crankshaft red sleeve adjusting device, the counterweight body and the adjusting rod are often in a structure that is difficult to disassemble. Once the counterweight body or the adjusting rod is worn or damaged, the entire device needs to be disassembled for maintenance, which is difficult and time-consuming, increases maintenance cost, and the counterweight body and the adjusting rod are fixed and matched, which cannot adapt to different specifications or types of adjusting rods. When the adjusting rod needs to be replaced to adapt to different assembly requirements, the counterweight body cannot be directly transferred for use, and the entire counterweight system needs to be redesigned or purchased, which is costly. SUMMARY

[0005] The present application provides a marine crankshaft red sleeve position adjusting device and method to solve at least one of the problems in the background art.

[0006] To solve the above technical problems, the present application discloses a marine crankshaft red sleeve position adjusting device, which comprises an adjusting rod, a counterweight frame detachably and slidably arranged on the adjusting rod, a counterweight block detachably mounted on the counterweight frame, a cleaning assembly arranged on the counterweight frame, and a lifting rod arranged on the adjusting rod. A plurality of adjusting holes extending upward and downward are formed in the adjusting rod, a lifting rod is arranged in the adjusting hole, the lifting rod is used to mount a crank and shaft assembly, there is a clamping gap between the lifting rod and the adjusting rod for clamping the crank and shaft assembly, and a threaded rod is arranged in the adjusting hole and detachably connected with the lifting rod.

[0007] Preferably, the counterweight frame comprises front and rear symmetrical sliding plates, the side close to each other of the sliding plates is provided with upper and lower mounting plates, the lower end of the upper mounting plate is symmetrically and fixedly provided with fixed rods, the side close to each other of the two fixed rods is rotationally connected with abutting wheels, the abutting wheels are in contact with the adjusting rods, the upper end of the upper mounting plate is further provided with a lifting ring, and the lower mounting plate is detachably provided with a plurality of counterweight blocks.

[0008] Preferably, the side close to each other of the sliding plates is slidably provided with a meandering plate, two rows of mounting holes are formed in the meandering plate, trapezoidal blocks are arranged in the mounting holes, the lower end of the two rows of trapezoidal blocks is fixedly provided with contact plates, the lower surface of the contact plate is provided with a friction pad, the trapezoidal block is sleeved with a spring, one end of the spring is fixedly connected with the contact plate, and the other end of the spring is fixedly connected with the meandering plate.

[0009] Preferably, the sliding plate is provided with a driving groove and an auxiliary groove symmetrically arranged along the driving groove, a threaded shaft is rotationally arranged in the driving groove, the sliding plate is further provided with a through groove, the threaded shaft extends downward into the through groove, the lower end of the threaded shaft is fixedly provided with a gear one, the threaded shaft is threadedly connected with the meandering plate, and the meandering plate is slidably connected with the auxiliary groove.

[0010] Preferably, the cleaning assembly comprises a mounting plate fixedly arranged on the side away from each other of the sliding plates, the mounting plate is provided with an air bag, the upper end of the air bag is fixedly provided with a pressing plate, the pressing plate is slidably connected with the sliding plate, and the pressing plate is fixedly connected with the meandering plate through the auxiliary groove.

[0011] Preferably, the side close to each other of the sliding plates is further rotationally connected with a rotation rod symmetrically arranged along the center of the counterweight frame, a plurality of limiting protrusions are arranged on the rotation rod, a plurality of limiting grooves are arranged on the lower surface of the adjusting rod, the limiting protrusions are matched with the limiting grooves, and the rotation rod is further provided with a gear two.

[0012] Preferably, the side away from each other of the sliding plates is further fixedly provided with left and right symmetrical guide rods, guide frames are slidably arranged on the guide rods, the side close to each other of the left and right symmetrical guide frames is fixedly connected with a pushing plate, the side close to each other of the two pushing plates is fixedly provided with a gear rack, and the gear rack is matched with the gear one.

[0013] Preferably, a rotating shaft is rotationally arranged through the eccentric position of the pushing plate, the one end of the rotating shaft is fixedly provided with a gear three, the gear three is symmetrically arranged along the center of the counterweight frame, the side away from each other of the pushing plate is further fixedly provided with a U-shaped handle, the rotating shaft passes through the U-shaped handle, and the other end of the rotating shaft is fixedly connected with a rotating wheel.

[0014] Preferably, the pushing plate is fixedly provided with a positioning box, two groups of positioning assemblies are arranged in the positioning box and are arranged at right angles, the positioning assembly comprises a positioning rod, the positioning rod extends out of the positioning box in a sliding mode, a wedge-shaped block is fixedly arranged on the positioning rod, a fixing ring is further arranged on the positioning rod, a reset member is sleeved on the positioning rod, one end of the reset member is fixedly connected with the fixing ring, and the other end of the reset member is fixedly connected with the inner wall of the positioning box.

[0015] A driving rod is further arranged on the positioning box in a sliding mode, one end of the driving rod is fixedly provided with a driving head, the driving head is matched with the wedge-shaped block, and the other end of the driving rod is fixedly provided with a pulling-out head.

[0016] Preferably, a marine crankshaft red sleeve position adjusting method is adjusted by using the adjusting device, and comprises the following steps.

[0017] S1: detachably and slidably mounting the counterweight frame to the adjusting rod; according to the estimated eccentric weight of the crank and shaft combination, a proper number of counterweight blocks are detachably mounted on the counterweight frame;

[0018] S2: detachably connecting the threaded rod with the suspender, reserving a gap for clamping the crank and shaft combination, mounting the crank and shaft combination to the suspender, and tightening the threaded rod to stably clamp the crank and shaft combination by the suspender;

[0019] S3: connecting the suspender with the crane, lifting the device provided with the crank and shaft combination by the crane; observing the balance state of the crank and shaft combination, if the crank and shaft combination is eccentric, adjusting the gravity center of the device by changing the counterweight position along the adjusting rod or detaching or increasing the number of counterweight blocks, until the crank and shaft combination is balanced;

[0020] S4: after the counterweight frame is no longer moved, cleaning the device components such as the adjusting rod and the suspender by using the cleaning assembly on the counterweight frame.

[0021] Compared with the prior art, the present application provides a marine crankshaft red sleeve position adjusting device and method, which eliminates the eccentric moment influence of the crank and shaft combination in the adjustment process before assembly by using the lever principle, installs the suspender by selecting the force arm adjustment hole at different positions, changes the length of the force arm, adapts to different specifications of the combination, accurately adjusts the attitude of the combination, offsets the eccentric moment of the combination after lifting, and guarantees the perpendicularity requirement of the axis;

[0022] The detachable counterweight frame can be quickly disassembled, transported and stored; when different specifications or types of adjusting rods are needed, the counterweight main body is disassembled and mounted on the new adjusting rod, so that the counterweight main body can be used interchangeably between different adjusting rods.

[0023] The counterweight frame is provided with a cleaning assembly, which can clean the adjusting rod, the boom and other components, remove dust, oil stains and other impurities on the surface of the components, reduce the wear of the components, prolong the service life of the device and ensure long-term stable operation of the device. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings are included to provide a further understanding of the application, and constitute a part of this specification, illustrate embodiments of the application, and are included to explain the application, and do not constitute a limitation of the application. In the drawings:

[0025] Figure 1 It is a structural schematic diagram of the application;

[0026] Figure 2 It is a structural schematic diagram of the counterweight frame of the application;

[0027] Figure 3 It is a cooperation schematic diagram of the abutting wheel and the adjusting rod of the application;

[0028] Figure 4 It is a top view of the counterweight frame of the application Figure 1 ;

[0029] Figure 5 It is a top view of the counterweight frame of the application Figure 2 ;

[0030] Figure 6 It is a mounting schematic diagram of the meander plate of the application;

[0031] Figure 7 It is a mounting schematic diagram of the air bag of the application;

[0032] Figure 8 It is a mounting schematic diagram of the rack of the application;

[0033] Figure 9 It is a mounting schematic diagram of the U-shaped handle of the application;

[0034] Figure 10 It is a structural schematic diagram of the limiting protrusion of the application;

[0035] Figure 11 It is an internal structural schematic diagram of the positioning box of the application;

[0036] Figure 12 It is a mounting schematic diagram of the driving rod of the application;

[0037] Figure 13 It is a cooperation schematic diagram of the driving head and the wedge-shaped block of the application.

[0038] In the figure: 1, counterweight frame; 2, lifting ring; 3, adjusting rod; 4, lifting rod; 5, crank and shaft combination; 6, threaded rod; 7, lifting rod; 8, upper mounting plate; 9, backplate; 10, trapezoidal block; 11, spring; 12, pressing plate; 13, sliding plate; 14, guide rod; 15, rotating rod; 16, lower mounting plate; 17, counterweight block; 18, limit bump; 19, pushing plate; 20, guide frame; 21, mounting plate; 22, air bag; 23, fixed rod; 24, abutting wheel; 25, gear two; 26, rotating shaft; 27, driving head; 28, gear three; 29, rotating wheel; 30, U-shaped handle; 31, rack; 32, auxiliary groove; 33, driving groove; 34, through groove; 35, gear one; 36, positioning box; 37, reset member; 38, wedge block; 39, fixed ring; 40, positioning rod; 41, pulling head; 42, elastic member; 43, driving rod; 44, threaded shaft. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0040] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0041] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "connection" and the like should be broadly understood, for example, "connection" can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] Embodiment 1

[0043] The embodiments of the present application provide a marine crank red sleeve position adjusting device, which comprises Figures 1-13As shown, including the adjustment rod 3, the adjustment rod 3 is detachably and slidably provided with the counterweight frame 1, the counterweight frame 1 is detachably installed with the counterweight block 17, the counterweight frame 1 is further provided with a cleaning assembly, the adjustment rod 3 is further provided with a lifting rod 7, the adjustment rod 3 is provided with a plurality of adjustment holes extending upward and downward, the lifting rod 4 is arranged in the adjustment hole, the lifting rod 4 is used to install the crank and shaft assembly 5, the lifting rod 4 and the adjustment rod 3 have a clamping gap for clamping the crank and shaft assembly 5, and the adjustment hole is further provided with a threaded rod 6, the threaded rod 6 is detachably connected with the lifting rod 4.

[0044] The working principle and beneficial effects of the above technical scheme are as follows: the counterweight frame 1 is detachably and slidably installed on the adjustment rod 3; according to the estimated overweight of the crank and shaft assembly 5, a proper number of counterweight blocks 17 are selected and detachably installed on the counterweight frame 1;

[0045] The threaded rod 6 is detachably connected with the lifting rod 4, a gap for clamping the crank and shaft assembly 5 is reserved, the crank and shaft assembly 5 is installed on the lifting rod 4, the threaded rod 6 is tightened, and the lifting rod 4 stably clamps the crank and shaft assembly 5;

[0046] The lifting rod 4 is connected with the crane, the device installed with the crank and shaft assembly 5 is lifted by the crane; the balance state of the crank and shaft assembly 5 is observed, if the crank and shaft assembly 5 is overweight, the counterweight position is changed by sliding the counterweight frame 1 along the adjustment rod 3, or the number of counterweight blocks 17 is adjusted, the gravity center of the device is adjusted, and the crank and shaft assembly 5 is balanced;

[0047] After the counterweight frame 1 is no longer moved, the cleaning assembly on the counterweight frame 1 is used to clean the device components such as the adjustment rod 3 and the lifting rod 4.

[0048] The lever principle is used to eliminate the eccentric moment influence of the crank and shaft assembly in the adjustment process before assembly, the lifting rod is installed in the force arm adjustment hole at different positions, the length of the force arm can be changed to adapt to different specifications of the assembly, the attitude of the assembly is accurately adjusted, the eccentric moment of the assembly after lifting is offset, and the perpendicularity requirement of the axis is ensured;

[0049] The detachable counterweight frame can be quickly disassembled, transported and stored; when different specifications or types of adjustment rods are needed, the counterweight body is disassembled and installed on the new adjustment rod, and the counterweight body can be used interchangeably between different adjustment rods;

[0050] The cleaning assembly is arranged on the counterweight frame, which can clean the adjustment rod, the lifting rod and other components, remove dust, oil stains and other impurities on the surface of the components, reduce the wear of the components, prolong the service life of the device, and ensure the long-term stable operation of the device.

[0051] Embodiment 2

[0052] On the basis of the above embodiment 1, as shown in Figures 2-3 The counterweight frame 1 includes front and rear symmetrical sliding plates 13, the sliding plates 13 are provided with upper mounting plates 8 and lower mounting plates 16 on the side close to each other, the upper mounting plates 8 are fixedly provided with fixed rods 23 at the lower end, the two fixed rods 23 are rotatably connected with abutting wheels 24 on the side close to each other, the abutting wheels 24 are in contact with the adjusting rod 3, the upper mounting plates 8 are further provided with lifting rings 2 at the upper end, and the lower mounting plates 16 are detachably provided with a plurality of counterweight blocks 17.

[0053] The working principle and beneficial effects of the above technical solution are as follows: the counterweight frame 1 is slidably mounted on the adjusting rod 3, at this time, the abutting wheels 24 are in contact with the adjusting rod 3, during the adjustment process, the abutting wheels 24 can roll along the adjusting rod 3, facilitating the sliding of the counterweight frame 1, reducing the strength required by the operator to push the counterweight frame 1, and reducing the physical consumption and technical difficulty of the operation; by changing the position of the counterweight frame 1 and increasing or decreasing the number of counterweight blocks 17, the center of gravity of the entire device can be adjusted until the crank and shaft assembly reach a balanced state

[0054] Embodiment 3

[0055] On the basis of the above embodiment 2, as shown in Figures 2-7 The sliding plates 13 are slidably provided with meandering plates 9 on the side close to each other, the meandering plates 9 are provided with two rows of mounting holes, the mounting holes are provided with trapezoidal blocks 10, the lower end of the two rows of trapezoidal blocks 10 is fixedly provided with contact plates, the lower surface of the contact plate is provided with a friction pad, the trapezoidal block 10 is sleeved with a spring 11, one end of the spring 11 is fixedly connected with the contact plate, and the other end of the spring 11 is fixedly connected with the meandering plate 9.

[0056] Preferably, the sliding plates 13 are provided with a driving groove 33 and an auxiliary groove 32 symmetrically arranged along the driving groove 33, a threaded shaft 44 is rotatably arranged in the driving groove 33, the sliding plates 13 are further provided with a through groove 34, the threaded shaft 44 extends downward into the through groove 34, a gear one 35 is fixedly arranged at the lower end of the threaded shaft 44, the meandering plate 9 is threadedly connected with the threaded shaft 44, and the meandering plate 9 is slidably connected with the auxiliary groove 32.

[0057] Preferably, the cleaning assembly includes a mounting plate 21 fixedly arranged on the side of the sliding plates 13 away from each other, the mounting plate 21 is provided with an air bag 22, the air bag 22 is fixedly provided with a pressing plate 12 at the upper end, the pressing plate 12 is slidably connected with the sliding plates 13, and the pressing plate 12 is fixedly connected with the meandering plate 9 through the auxiliary groove 32.

[0058] The working principle and beneficial effects of the above technical solution are as follows: the gear one 35 rotates to drive the threaded shaft 44 to rotate, the threaded shaft 44 drives the meandering plate 9 to slide up and down along the auxiliary groove 32, with the movement of the meandering plate 9, the trapezoidal block 10 installed thereon also moves, the contact plate at the lower end of the trapezoidal block 10 and the friction pad will contact the adjusting rod 3, the spring 11 is compressed, and under the elastic force, a large friction force is generated between the friction pad and the adjusting rod 3, effectively preventing the counterweight frame 1 from accidentally sliding on the adjusting rod 3;

[0059] During the sliding of the meandering plate 9, the pressing plate 12 fixedly connected with the meandering plate 9 moves synchronously, when the meandering plate 9 slides downward, the pressing plate 12 extrudes the air bag 22 downward, the air bag 22 sprays gas or cleaning liquid outward after being extruded (the air bag is filled with cleaning liquid), the air bag 22 is provided with an output hose, the output position of the output hose can be adjusted, and the dust, oil stains and other impurities on the surface of the adjusting rod 3, the boom 4 and other device components can be cleaned; when the meandering plate 9 slides upward, the air bag 22 returns to the original state and inhales air or cleaning liquid, preparing for the next cleaning.

[0060] The cleaning assembly is associated with the movement of the meandering plate 9, so that automatic cleaning of the device components can be realized without additional operation, the cleaning work is completed while the adjusting rod 3 is clamped, the manual cleaning steps are reduced, the work efficiency is improved, and the device performance and service life are affected by the impurities on the surface of the components.

[0061] Embodiment 4

[0062] On the basis of the above-mentioned embodiment 3, as shown in Figure 2 , Figures 4-10 The side of the sliding plates 13 close to each other is further rotationally connected with rotation rods 15 which are symmetric along the center of the counterweight frame 1, a plurality of limiting protrusions 18 are installed on the rotation rods 15, a plurality of limiting grooves are arranged on the lower surface of the adjusting rod 3, the limiting protrusions 18 are matched with the limiting grooves, and a gear two 25 is further arranged on the rotation rods 15.

[0063] Preferably, the side of the sliding plates 13 away from each other is further fixedly provided with left-right symmetric guide rods 14, guide frames 20 are slidably arranged on the guide rods 14, the side of the left-right symmetric guide frames 20 close to each other is fixedly connected with push plates 19, the side of the two push plates 19 close to each other is fixedly provided with a gear rack 31, and the gear rack 31 is matched with the gear one 35.

[0064] Preferably, the eccentric position of the push plate 19 is rotationally and penetratingly provided with a rotating shaft 26, the one end of the rotating shaft 26 is fixedly provided with a gear three 28, the gear three 28 is symmetric along the center of the counterweight frame 1, the side of the push plate 19 away from each other is further fixedly provided with a U-shaped handle 30, the rotating shaft 26 penetrates through the U-shaped handle 30, and the other end of the rotating shaft 26 is fixedly connected with a rotating wheel 29.

[0065] Wherein, according to actual needs, the counterweight block 17 can be detachably arranged below the push plate 19 and the guide frame 20.

[0066] The working principle and beneficial effects of the above technical solution are as follows: the U-shaped handle 30 is held to push the push plate 19, the push plate 19 slides on the guide rod 14, at this time, the rack 31 on the push plate 19 moves and engages with the gear one 35 to drive the gear one 35 to rotate, then the trapezoidal block 10 contacts the adjusting rod 3;

[0067] When the push plate 19 moves to the appropriate position (i.e. the meshing position of the gear three 28 and the gear two 25), the rotating wheel 29 is rotated to drive the rotating shaft 26 to rotate, the gear three 28 at one end of the rotating shaft 26 drives the gear two 25 to rotate, the gear two 25 drives the rotating rod 15 to rotate, and the limiting protrusion 18 on the rotating rod 15 rotates and is clamped into the limiting groove, thereby limiting the sliding of the counterweight frame 1 on the adjusting rod 3, and the positioning of the counterweight frame 1 is realized.

[0068] By holding the U-shaped handle 30 to push the push plate 19, the rack 31 engages with the gear one 35 to drive, the contact between the trapezoidal block 10 and the adjusting rod 3 can be accurately controlled, and the accurate adjustment of the position of the counterweight frame 1 is realized; then the rotating wheel 29 is rotated, the gear three 28 drives the gear two 25, the limiting protrusion 18 on the rotating rod 15 is clamped into the limiting groove, the accurate positioning of the counterweight frame 1 is realized, and the accuracy and reliability of the adjustment are improved.

[0069] Example 5

[0070] On the basis of the above-mentioned embodiment 4, as shown in Figure 9 , Figures 11-13 The push plate 19 is fixedly provided with a positioning box 36, two groups of positioning assemblies are arranged in the positioning box 36 and arranged at a right angle, the positioning assembly comprises a positioning rod 40, the positioning rod 40 slides out of the positioning box 36, a wedge-shaped block 38 is fixedly arranged on the positioning rod 40, a fixed ring 39 is arranged on the positioning rod 40, a reset member 37 is sleeved on the positioning rod 40, one end of the reset member 37 is fixedly connected with the fixed ring 39, and the other end of the reset member 37 is fixedly connected with the inner wall of the positioning box 36.

[0071] A driving rod 43 is also slidably arranged on the positioning box 36, a driving head 27 is fixedly arranged on one end of the driving rod 43, the driving head 27 cooperates with the wedge-shaped block 38, and a pulling head 41 is fixedly arranged on the other end of the driving rod 43.

[0072] Wherein, a plurality of insertion holes are formed in the guide rod 14, and a plurality of insertion holes are also arranged on the rotating shaft 26.

[0073] The elastic member 42 is sleeved on the driving rod 43, one end of the elastic member 42 is fixedly connected with the pulling head 41, and the other end of the elastic member 42 is fixedly connected with the positioning box 36.

[0074] The working principle and beneficial effects of the above technical scheme are as follows: in the initial position, the driving head 27 cooperates with the wedge-shaped block 38, the positioning rod 40 is inserted into the insertion hole on the guide rod 14 and the insertion hole on the rotating shaft 26, so that the push plate 19 cannot be moved, and the rotating shaft 26 cannot be rotated; when the push plate 19 needs to be moved and the rotating shaft 26 needs to be rotated, the driving rod 43 is pulled out, the driving head 27 is separated from the wedge-shaped block 38, and under the elastic restoring force of the reset member 37, the positioning rod 40 is retracted into the positioning box 36, and then the push plate 19 is moved and the rotating shaft 26 is rotated; through the insertion holes on the guide rod 14 and the rotating shaft 26, high-precision positioning of the push plate 19 can be achieved, thereby accurately fixing the position of the counterweight frame 1, and the limit protrusion 18 cannot be separated after being clamped into the limiting groove, the cooperation degree of the whole structure is high, and the practicability is high.

[0075] Embodiment 6

[0076] The embodiment provides a marine crankshaft red sleeve position adjusting method, which is adjusted by using the adjusting device described above, and includes the following steps:

[0077] S1: detachably and slidably install the counterweight frame 1 to the adjusting rod 3; according to the estimated overweight of the crank and shaft combination 5, a proper number of counterweight blocks 17 are selected and detachably installed on the counterweight frame 1;

[0078] S2: detachably connect the threaded rod 6 with the hanger rod 4, reserve a gap for clamping the crank and shaft combination 5, install the crank and shaft combination 5 to the hanger rod 4, and tighten the threaded rod 6 to stably clamp the crank and shaft combination 5 to the hanger rod 4;

[0079] S3: connect the hanger rod 4 with the crane, hoist the device with the crank and shaft combination 5 by the crane; observe the balance state of the crank and shaft combination 5, if the crank and shaft combination 5 is overweight, adjust the gravity center of the device by sliding the counterweight frame 1 along the adjusting rod 3 to change the counterweight position, or detach and increase the number of counterweight blocks 17 until the crank and shaft combination 5 is balanced;

[0080] S4: after the counterweight frame 1 stops moving, use the cleaning assembly on the counterweight frame 1 to clean the device components such as the adjusting rod 3 and the hanger rod 4.

[0081] The beneficial effects of the above technical scheme are: the eccentric moment influence of the crank and the shaft assembly in the adjustment process before assembly is eliminated by using the lever principle, the length of the force arm can be changed by installing the lifting rod through the force arm adjustment hole at different positions to adapt to different specifications of the assembly, the attitude of the assembly is accurately adjusted, the eccentric moment after the assembly is lifted is offset, and the axial perpendicularity requirement is ensured;

[0082] The counterweight frame can be quickly disassembled, transported and stored; when different specifications or types of adjusting rods are needed, the counterweight body is disassembled and installed on the new adjusting rod to realize the interchangeable use of the counterweight body between different adjusting rods;

[0083] The cleaning assembly is arranged on the counterweight frame, which can clean the adjusting rod, the lifting rod and other components, remove dust, oil stains and other impurities on the surface of the components, reduce the wear of the components, prolong the service life of the device, and ensure long-term stable operation of the device.

[0084] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application.

Claims

1. A device for adjusting the position of a crankshaft bushing in a marine engine, characterized in that Including the adjustment rod (3), the counterweight frame (1) is detachably and slidably arranged on the adjustment rod (3), the counterweight block (17) is detachably installed on the counterweight frame (1), the cleaning assembly is further arranged on the counterweight frame (1), the lifting rod (7) is further arranged on the adjustment rod (3), a plurality of adjustment holes extending upward and downward are formed on the adjustment rod (3), the lifting rod (4) is arranged in the adjustment hole, the lifting rod (4) is used for installing the crank and shaft combination (5), there is a clamping gap for clamping the crank and shaft combination (5) between the lifting rod (4) and the adjustment rod (3), the threaded rod (6) is further arranged in the adjustment hole, and the threaded rod (6) is detachably connected with the lifting rod (4); The counterweight frame (1) comprises front and rear symmetrical sliding plates (13), the sliding plates (13) are provided with upper mounting plates (8) and lower mounting plates (16) on the side close to each other, the upper mounting plates (8) are fixedly provided with fixed rods (23) at the lower end, the two fixed rods (23) are rotatably connected with the abutting wheels (24) on the side close to each other, the abutting wheels (24) are in contact with the adjustment rod (3), the upper mounting plates (8) are further provided with lifting eyes (2) at the upper end, and the lower mounting plates (16) are detachably provided with a plurality of counterweight blocks (17). The sliding plates (13) are slidably provided with the meandering plates (9) on the side close to each other, the meandering plates (9) are provided with two rows of mounting holes, the mounting holes are provided with trapezoidal blocks (10), the lower ends of the two rows of trapezoidal blocks (10) are fixedly provided with contact plates, the lower surfaces of the contact plates are provided with friction pads, the trapezoidal blocks (10) are sleeved with springs (11), one end of the spring (11) is fixedly connected with the contact plate, and the other end of the spring (11) is fixedly connected with the meandering plate (9). The sliding plates (13) are provided with a driving groove (33) and an auxiliary groove (32) symmetrically arranged along the driving groove (33), the threaded shaft (44) is rotatably arranged in the driving groove (33), the sliding plates (13) are further provided with a through groove (34), the threaded shaft (44) extends downward into the through groove (34), the lower end of the threaded shaft (44) is fixedly provided with a gear one (35), the threaded shaft (44) is threadedly connected with the meandering plate (9), and the meandering plate (9) is slidably connected with the auxiliary groove (32).

2. A red bush position adjusting device for a marine crankshaft according to claim 1, characterized in that, The cleaning assembly comprises a mounting plate (21), the mounting plate (21) is fixedly arranged on the side away from each other of the sliding plates (13), the mounting plate (21) is provided with an air bag (22), the air bag (22) is fixedly provided with a pressing plate (12) at the upper end, the pressing plate (12) is slidably connected with the sliding plates (13), and the pressing plate (12) is fixedly connected with the meandering plate (9) through the auxiliary groove (32).

3. A red bush position adjusting device for a marine crankshaft according to claim 1, characterized in that, The sliding plates (13) are further rotatably connected with rotating rods (15) symmetrically along the center of the counterweight frame (1) on the side close to each other, the rotating rods (15) are provided with a plurality of limiting protrusions (18), the lower surface of the adjustment rod (3) is provided with a plurality of limiting grooves, the limiting protrusions (18) are matched with the limiting grooves, and the rotating rods (15) are further provided with a gear two (25).

4. A red bush position adjusting device for a marine crankshaft according to claim 3, characterized in that, The side away from each other of the sliding plate (13) is also fixedly provided with left and right symmetrical guide rods (14), the guide rods (14) are slidably provided with guide frames (20), the left and right symmetrical guide frames (20) are fixedly connected with the push plates (19) on the side close to each other, the left and right symmetrical guide frames (20) are fixedly provided with the rack (31) on the side close to each other, and the rack (31) is matched with the gear one (35).

5. A red bush position adjusting device for a marine crankshaft according to claim 4, wherein The eccentric position of the push plate (19) is rotatably provided with a rotating shaft (26), one end of the rotating shaft (26) is fixedly provided with a gear three (28), the gear three (28) is symmetrical along the center of the counterweight frame (1), the side away from each other of the push plate (19) is also fixedly provided with a U-shaped handle (30), the rotating shaft (26) passes through the U-shaped handle (30), and the other end of the rotating shaft (26) is fixedly connected with a rotating wheel (29).

6. A red bush position adjusting device for a marine crankshaft according to claim 5, wherein The push plate (19) is fixedly provided with a positioning box (36), two groups of positioning assemblies arranged at right angles are arranged in the positioning box (36), the positioning assembly comprises a positioning rod (40), the positioning rod (40) slidably extends out of the positioning box (36), the positioning rod (40) is fixedly provided with a wedge-shaped block (38), the positioning rod (40) is also provided with a fixed ring (39), the positioning rod (40) is sleeved with a reset member (37), one end of the reset member (37) is fixedly connected with the fixed ring (39), and the other end of the reset member (37) is fixedly connected with the inner wall of the positioning box (36). The positioning box (36) is also slidably provided with a driving rod (43), one end of the driving rod (43) is fixedly provided with a driving head (27), the driving head (27) is matched with the wedge-shaped block (38), and the other end of the driving rod (43) is fixedly provided with a pulling head (41).

7. A method of adjusting the redial position of a marine crankshaft using the adjusting device according to any one of claims 1 to 6, characterized in that The method comprises the following steps: S1: detachably and slidably mounting the counterweight frame (1) to the adjusting rod (3); according to the estimated eccentric weight of the crank and shaft combination (5), a proper number of counterweight blocks (17) are detachably mounted on the counterweight frame (1); S2: detachably connecting the threaded rod (6) and the suspender (4), reserving a gap for clamping the crank and shaft combination (5), mounting the crank and shaft combination (5) to the suspender (4), and tightening the threaded rod (6) to stably clamp the suspender (4) to the crank and shaft combination (5); S3: connecting the suspender (4) and the crane, hoisting the device provided with the crank and shaft combination (5) by the crane; observing the balance state of the crank and shaft combination (5), if the eccentric weight appears, the counterweight position is changed by sliding the counterweight frame (1) along the adjusting rod (3), or the number of counterweight blocks (17) is removed or increased, so that the gravity center of the device is adjusted until the crank and shaft combination (5) reaches balance; S4: after the counterweight frame (1) is no longer moved, the cleaning assembly on the counterweight frame (1) is used to clean the device parts such as the adjusting rod (3) and the suspender (4).

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