Disassembling and assembling device for main bearing bolt

Abstract

The utility model discloses a dismounting and mounting device for a main bearing bolt, and relates to the technical field of marine diesel engine maintenance. Comprising a wrench assembly and a pull rope assembly. The wrench assembly comprises a wrench and a clamping plate connecting piece. One end of the wrench is provided with a sleeve hole for sleeving a main bearing bolt, and the other end of the wrench is hinged with a clamping plate connecting piece; the pull rope assembly comprises a steel wire rope, a check block and a guide cylinder. The stretching-in end of the steel wire rope is connected with a stop block which can be connected with the clamping plate connecting piece in a clamping manner; the extending end of the steel wire rope can penetrate through a guide cylinder connected to the engine cylinder body to extend out of the engine cylinder body; the guide cylinder is provided with a guide cavity capable of containing the steel wire rope, and the width of the guide cavity is gradually increased from the side facing the stretching-in end of the steel wire rope to the side facing the stretching-out end of the steel wire rope. By operating the steel wire rope outside the engine cylinder body, the main bearing bolt can be disassembled and assembled, and the main bearing bolt can be quickly disassembled and assembled in a narrow space of an engine.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of marine diesel engine maintenance, and particularly relates to a dismounting device for main bearing bolts. BACKGROUND

[0002] The diesel engine body group is mainly composed of a cylinder head, a cylinder gasket, a cylinder body, an oil pan and a cylinder head cover, etc. A crankshaft flywheel group is connected in the cylinder body, and the crankshaft flywheel group is mainly composed of a crankshaft, a crankshaft main bearing, a bearing cover, a flywheel, a crankshaft pulley and a timing gear, etc. The crankshaft in the crankshaft flywheel group is connected with the crankshaft main bearing, and the crankshaft main bearing is connected to the cylinder body through the main bearing cover and the main bearing cover bolt. Therefore, when the crankshaft main bearing needs to be dismounted, the main bearing bolt on the main bearing cover needs to be dismounted first.

[0003] Generally, when the main bearing bolt on the main bearing cover needs to be dismounted, the oil pan needs to be dismounted first. However, the operation space around the diesel engine on the ship is relatively narrow, and the oil pan of some diesel engines is wrapped by front and rear end covers and other components, so there is no operation space for dismounting the oil pan alone. Therefore, the oil pan cannot be directly opened, and other structures need to be dismounted first, which leads to too many parts involved in dismounting, a complicated dismounting process, a long dismounting time and further increased difficulty in dismounting the main bearing bolt. CONTENT OF THE UTILITY MODEL

[0004] The utility model provides a kind of dismounting device for main bearing bolt, to solve the operation space around the existing diesel engine narrow, it is not conducive to open oil pan and then cannot remove main bearing bolt, remove oil pan then need to remove other structures near oil pan, leading to too many parts involved in dismounting, the problem of complicated dismounting process and long time consumption.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] A kind of dismounting device for main bearing bolt, including spanner assembly and pull rope assembly;

[0007] The spanner assembly includes spanner and clamping plate connecting piece;One end of spanner has sleeve hole for sleeving main bearing bolt, and the other end of spanner is hingedly connected with clamping plate connecting piece;

[0008] The pull rope assembly includes steel wire rope, stop block and guide cylinder;The extending end of steel wire rope is connected with stop block, and stop block can be connected with clamping plate connecting piece;The extending end of steel wire rope can pass through guide cylinder connected to engine cylinder and extend out of engine cylinder;Guide cylinder is provided with guide cavity capable of accommodating steel wire rope, and the width of guide cavity gradually increases from the side towards the extending end of steel wire rope to the side towards the extending end of steel wire rope.

[0009] The utility model discloses a kind of dismantling and assembling devices of main bearing bolt, and still have the following additional technical features to the utility model:

[0010] The engine cylinder block has a reserved hole communicating with the inside of the engine cylinder block, and the reserved hole has an internal thread; the guide cylinder has a connecting end protruding from the end face, and the connecting end has an external thread; the external thread of the connecting end is connected with the internal thread of the reserved hole, so that the guide cylinder is connected to the outside of the engine cylinder block.

[0011] A guide hole communicating with the inside of the engine cylinder block is formed in the connecting end; the guide hole and the guide cavity are in communication to form a guide channel for passing the steel wire rope; the guide channel has an arc-shaped guide surface, so that the projection of the guide channel along the radial direction of the guide cylinder has a horn-shaped structure.

[0012] The guide cylinder has at least two groups of symmetrically arranged mounting holes in the circumferential direction, and a steel rod is arranged in the mounting hole; the steel rod is rotated to tightly connect the guide cylinder to the engine cylinder block.

[0013] The wrench assembly further includes a plurality of fastening screws threadedly connected to the wrench; the plurality of fastening screws can be moved along the radial direction of the sleeve hole to abut against the main bearing bolt, so that the main bearing bolt is clamped in the sleeve hole.

[0014] The clamping plate connector includes a clamping plate and a connector; the clamping plate has a U-shaped structure, and the first end of the clamping plate is hingedly connected to the wrench; the second end of the clamping plate is connected with the connector.

[0015] The wrench assembly further includes an elastic stop ring and a pin; the first end of the clamping plate is hingedly connected to the wrench through the pin, and the elastic stop ring is connected between the first end of the clamping plate and the end of the pin.

[0016] The connector has a clamping groove, and the stop block has a buckle matched with the clamping groove; the buckle and the clamping groove are connected, so that the stop block is clamped in the connector.

[0017] The extending end of the steel wire rope is bent to form a round ring type rope buckle.

[0018] The rope buckle is connected with a fixing block.

[0019] Thanks to the above technical solutions, the utility model has the following advantages:

[0020] This application discloses a device for disassembling and assembling main bearing bolts. By pulling the extended end of a steel wire rope located outside the engine block, a clamping plate connector can be rotated relative to a wrench. The rotation of the clamping plate connector, in turn, drives the wrench to rotate, thus enabling the disassembly and assembly of the main bearing bolts. Because the width of the guide cylinder gradually increases from the side facing the insertion end of the steel wire rope to the side facing the extension end, ample space is provided for the movement of the steel wire rope within the guide cylinder. This allows for pulling the steel wire rope at large angles, enabling arbitrary pulling within a 360° range. This device is more adaptable to disassembling and assembling main bearing bolts in different positions on diesel engines, facilitating the application of force in multiple directions, saving time and effort, and improving disassembly and assembly efficiency. Steel wire ropes are flexible and can change the direction of force. Normally, a large torque is required when disassembling and assembling main bearing bolts, which means that a large wrench is usually needed to disassemble and assemble the main bearing bolts. However, by setting up steel wire ropes and the guide cavity of the guide cylinder, the steel wire rope can expand its tension range, thereby increasing the torque on the main bearing bolts in a limited space, making it more suitable for confined working spaces.

[0021] This application discloses a main bearing bolt removal and installation device. An arm can be placed inside the engine block to remove the main bearing bolts without disassembling the oil pan or other surrounding structural components, reducing the number of parts and simplifying the process. Furthermore, this device eliminates the need for manual wrench operation inside the engine block, allowing for bolt removal and installation from outside the block. The device allows for bolt removal and installation by extending the arm, carrying the device, into the engine block and then extending it outwards. No further manual operation is required inside the engine block; instead, a steel cable is manipulated outside the engine block to stretch and rotate the wrench, enabling rapid bolt removal and installation even in the confined space of an engine.

[0022] 2. In a preferred embodiment of the present invention, the engine cylinder block has a reserved hole that communicates with the interior of the engine cylinder block, and the reserved hole has an internal thread; the guide cylinder has a connecting end that protrudes from the end face, and the connecting end has an external thread; the external thread of the connecting end is connected to the internal thread of the reserved hole, so that the guide cylinder is connected to the outside of the engine cylinder block.

[0023] The engine block has pre-drilled holes, which are typically sealed with bolts, thus not affecting the engine block's safety performance or preventing oil leakage. The pre-drilled holes have internal threads to facilitate connection to the guide cylinder. Therefore, the connecting end of the guide cylinder has external threads. The connecting end of the guide cylinder, as a protruding structure on the end face, easily extends into the pre-drilled hole and connects with the threaded connection, enabling the positioning and installation of the guide cylinder. The guide cylinder provides a fulcrum for the tension of the wire rope, allowing the wire rope to pass through its interior and, with the support of the guide cylinder, further enable the rotation of the wrench connected to the wire rope's insertion end, thereby facilitating the disassembly and assembly of the main bearing bolts.

[0024] 3. In a preferred embodiment of the present invention, a guide hole communicating with the inside of the engine cylinder is provided in the connecting end; the guide hole and the guide cavity are connected to form a guide channel for threading the wire rope; the guide channel has an arc-shaped guide surface, so that the projection of the guide channel along the radial direction of the guide cylinder is a trumpet-shaped structure.

[0025] The purpose of opening a guide hole at the connecting end that communicates with the engine cylinder block is to allow the wire rope to pass through the guide hole of the guide cylinder and extend into the interior of the engine cylinder block. The purpose of connecting the guide hole with the guide cavity is to form a guide channel for threading the wire rope. With this configuration, the end of the wire rope extends into the engine cylinder block from the guide channel, and the end of the wire rope extends out of the guide cylinder from the guide channel, making it convenient for workers to connect it with a hoist. This further enables the wrench to be pulled from outside the engine cylinder block, thereby achieving quick disassembly and assembly of the main bearing bolts.

[0026] 4. In a preferred embodiment of the present invention, the guide cylinder is provided with at least two sets of symmetrical mounting holes along the circumferential direction. Steel bars are inserted into the mounting holes, and the guide cylinder is fastened to the engine cylinder block by rotating the steel bars.

[0027] The purpose of providing symmetrical mounting holes in the circumferential direction of the guide tube is to facilitate the installation of the steel rod. Thus, when the guide tube is installed on the engine block, rotating the steel rod can more firmly connect the guide tube to the engine block, which further improves the connection stability between the guide tube and the engine block compared to directly tightening the guide tube.

[0028] 5. In a preferred embodiment of the present invention, the wrench assembly further includes a plurality of fastening screws threaded to the wrench; the plurality of fastening screws can move radially along the sleeve hole respectively to abut against the circumference of the main bearing bolt, so that the main bearing bolt is clamped in the sleeve hole.

[0029] By setting multiple fastening screws in the circumferential direction of the wrench, when the wrench socket is placed on the outside of the main bearing bolt, tightening the fastening screws will bring them closer to the center along the radial direction of the socket, so that the fastening screws further abut against the circumference of the main bearing bolt, thereby making the connection between the wrench and the main bearing bolt more secure. When the wire rope pulls the wrench to rotate, the main bearing bolt can be turned, thus realizing the quick assembly and disassembly of the main bearing bolt. Attached Figure Description

[0030] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0031] Figure 1 This is a schematic diagram of the structure of a main bearing bolt disassembly and assembly device installed on a main bearing bolt according to one embodiment of the present invention.

[0032] Figure 2 This is a structural diagram of a wrench assembly for a main bearing bolt disassembly and assembly device according to one embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of the structure of a wrench for disassembling and assembling a main bearing bolt according to one embodiment of the present invention;

[0034] Figure 4 This is a structural diagram of a pull rope assembly for a main bearing bolt disassembly and assembly device according to one embodiment of the present invention;

[0035] Figure 5 This is a cross-sectional schematic diagram of the guide cylinder of a main bearing bolt disassembly and assembly device according to one embodiment of the present invention;

[0036] Figure 6 This is a front view of the guide cylinder of a main bearing bolt disassembly and assembly device according to one embodiment of the present invention.

[0037] In the picture,

[0038] 1. Engine block;

[0039] 2. Wrench assembly; 21. Wrench; 22. Clamping plate connector; 221. Clamping plate; 222. Connector;

[0040] 3. Pull rope assembly; 31. Steel wire rope; 32. Stop block; 33. Guide cylinder;

[0041] 4. Guide hole; 5. Guide cavity; 6. Mounting hole; 7. Fastening screw; 8. Elastic retaining ring; 9. Pin; 10. Rope buckle; 11. Fixing block. Detailed Implementation

[0042] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0043] Furthermore, it should be understood in the description of this utility model that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0044] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0045] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "implementation," "example," "aspect," or "specific example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0046] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0047] This utility model relates to a device for disassembling and assembling main bearing bolts, such as... Figures 1-6 As shown, it includes a wrench assembly 2 and a pull rope assembly 3;

[0048] The wrench assembly 2 includes a wrench 21 and a clamping plate connector 22; one end of the wrench 21 has a sleeve hole for fitting the main bearing bolt, and the other end of the wrench 21 is hinged to the clamping plate connector 22.

[0049] The cable assembly 3 includes a wire rope 31, a stop block 32, and a guide cylinder 33. The end of the wire rope 31 is connected to the stop block 32, which can be engaged with the clamping plate connector 22. The end of the wire rope 31 can pass through the guide cylinder 33 connected to the engine cylinder 1 and extend out of the engine cylinder 1. The guide cylinder 33 has a guide cavity 5 that can accommodate the wire rope 31. The width of the guide cavity 5 gradually increases from the side facing the end of the wire rope 31 to the side facing the end of the wire rope 31.

[0050] When it is necessary to remove the main bearing bolts, first remove the crankcase side cover. Then, the arm carrying the main bearing bolt removal and installation device extends into the engine block through the original crankcase side cover location. Figure 1 As shown, the socket of the wrench 21 of the wrench assembly 2 is fitted onto the main bearing bolt; then, the guide cylinder 33 of the pull rope assembly 3 is connected to the outer wall of the engine block; then, the stop block 32 is snapped into place with the clamping plate connector 22 of the wrench assembly 2. At this time, the infeed end of the wire rope 31 of the pull rope assembly 3 is already inside the engine block, and the protruding end of the wire rope 31 passes through the guide cavity 5 of the guide cylinder 33 and extends out of the engine block, thus completing the connection of the main bearing bolt removal and installation device inside the engine block.

[0051] Pulling the extended end of the wire rope 31 causes the clamp connector 22 to rotate relative to the wrench 21, which in turn rotates the wrench 21, allowing it to be used for disassembling and assembling the main bearing bolt. When the extended end of the wire rope 31 has pulled the wrench 21 to rotate a certain angle in the same direction, and it is necessary to rotate the wrench 21 again in the same direction, an arm can be inserted to re-fit the socket of the wrench 21 onto the main bearing bolt, and then the extended end of the wire rope 31 can be pulled to rotate the wrench 21. In practical applications, depending on the ship's conditions, the extended end of the wire rope 31 can be pulled in a suitable direction using a hoist to rotate the wrench 21.

[0052] Because the width of the guide cylinder 33 gradually increases from the side facing the insertion end of the wire rope 31 to the side facing the extension end of the wire rope 31, it provides ample space for the movement of the wire rope 31 within the guide cylinder 33. This allows for large-angle pulling of the wire rope 31, enabling it to be pulled arbitrarily within a 360° range. This adapts to the disassembly and assembly of main bearing bolts in different positions on diesel engines, facilitating the application of force in multiple directions, saving time and effort, and improving the efficiency of disassembly and assembly. The wire rope 31 is flexible and can change the direction of force. Originally, disassembling and assembling main bearing bolts required a large torque, which usually meant that a large wrench 21 was needed. However, through the design of the wire rope 31 and the unique structural design of the guide cavity 5 inside the guide cylinder 33, the wire rope 31 can expand its stretching range, thereby increasing the torque applied to the main bearing bolts in a limited space, making it more suitable for operations in confined spaces.

[0053] The space after removing the crankcase side cover allows for the extension and retraction of an arm, but it does not allow the arm to rotate the wrench 21 inside the engine block 1. This is because the space required to rotate the wrench 21 is relatively large, and the actual usable space inside the engine block 1 is quite small. Therefore, the main bearing bolt removal and installation device of this application allows the arm to be placed inside the engine block 1. With this main bearing bolt removal and installation device, the oil pan does not need to be removed when removing the main bearing bolts, and therefore, other structural components around the oil pan do not need to be removed either. This reduces the number of parts to be removed and the cumbersome disassembly and assembly process. Moreover, the main bearing bolt removal and installation device avoids the traditional operation of manually rotating the wrench 21 inside the engine block 1, allowing the main bearing bolts to be removed and installed outside the engine block. The main bearing bolt removal and installation device of this application can realize the removal and installation of the main bearing bolt. After the arm carrying the main bearing bolt removal and installation device is inserted into the engine cylinder 1 to complete the installation, the arm can directly extend out of the engine cylinder. There is no need to manually remove and install the main bearing bolt through the arm inside the engine cylinder. It is only necessary to operate the wire rope 31 outside the engine cylinder to stretch the wire rope 31 and drive the wrench 21 to rotate, thereby realizing the removal and installation of the main bearing bolt. It can realize the quick removal and installation of the main bearing bolt in the narrow space of the engine.

[0054] like Figure 1 As shown, when the wrench 21 of the main bearing bolt removal and installation device on the right is rotated clockwise to remove the main bearing bolt, the wrench 21 of the main bearing bolt removal and installation device on the left is rotated counterclockwise to tighten the main bearing bolt, so that the main bearing bolt is installed on the main bearing cover.

[0055] In a preferred embodiment, the engine cylinder 1 has a reserved hole that communicates with the interior of the engine cylinder 1, and the reserved hole has an internal thread; the guide cylinder 33 has a connecting end that protrudes from the end face and has an external thread; the external thread of the connecting end is connected to the internal thread of the reserved hole, so that the guide cylinder 33 is connected to the outside of the engine cylinder 1.

[0056] The engine block 1 has a pre-drilled hole, which is usually sealed with bolts, thus not affecting the safety performance of the engine block 1 or causing oil leakage. The pre-drilled hole has internal threads to facilitate connection to the guide cylinder 33. Therefore, the connecting end of the guide cylinder 33 has external threads. The connecting end of the guide cylinder 33, as a protruding structure on the end face, easily extends into the pre-drilled hole and connects with the threaded connection, allowing the end face of the guide cylinder 33 to abut against the outer wall of the engine block 1, thereby achieving the positioning and installation of the guide cylinder 33. The guide cylinder 33 can be detachably connected to the engine block 1. Besides guiding the wire rope 31, the guide cylinder 33 also provides a fulcrum for the tension of the wire rope 31, facilitating the rotation of the wrench 21 under the support of the guide cylinder 33 after the wire rope 31 passes through it, thus enabling the disassembly and assembly of the main bearing bolts.

[0057] Furthermore, a guide hole 4 is provided inside the connecting end, communicating with the interior of the engine cylinder block 1; the guide hole 4 communicates with the guide cavity 5 to form a guide channel for threading the steel wire rope 31; such as Figure 5 As shown, the guide channel has an arc-shaped guide surface, so that the projection of the guide channel along the radial direction of the guide cylinder 33 is a trumpet-shaped structure.

[0058] The purpose of opening a guide hole 4 at the connecting end that communicates with the engine cylinder 1 is to allow the wire rope 31 to pass through the guide hole 4 of the guide cylinder 33 and extend into the interior of the engine cylinder 1. The purpose of connecting the guide hole 4 with the guide cavity 5 is to form a guide channel for the wire rope 31. With this configuration, the insert end of the wire rope 31 extends into the interior of the engine cylinder 1 from the guide channel, and the protruding end of the wire rope 31 extends out of the guide cylinder 33 from the guide channel, making it convenient for workers to connect it with a hoist. By pulling the protruding end of the wire rope 31 with the hoist, the wrench 21 can be pulled, and the wrench 21 can be rotated to disassemble and assemble the main bearing bolt.

[0059] like Figure 5As shown, the guide channel is equipped with an arc-shaped guide surface, making the projection of the guide channel along the radial direction of the guide cylinder 33 appear as a trumpet shape. This aims to further increase the movement angle of the wire rope 31 within the guide channel. The smooth guide surface also further reduces the resistance to the wire rope 31, further increasing the tension range of the wire rope 31 and enabling 360° tension movement of the wire rope 31 within the guide channel. This better accommodates the assembly and disassembly of the main bearing bolts at different positions, thereby increasing the space for applying force to the wire rope 31 and increasing the force exerted on the main bearing bolts. Adjusting the tension angle of the wire rope 31 according to the position of the main bearing bolts allows for rapid assembly and disassembly of the main bearing bolts at different locations.

[0060] Furthermore, the guide cylinder 33 has at least two sets of symmetrical mounting holes 6 along the circumferential direction. The mounting holes 6 are used to insert steel bars, and the guide cylinder 33 is fastened to the engine cylinder block 1 by rotating the steel bars.

[0061] Preferably, such as Figure 6 As shown, two sets of four mounting holes 6 are provided in the circumferential direction of the guide cylinder 33. The mounting holes 6 do not penetrate through the guide cylinder 33. One set of mounting holes 6 is symmetrical in the radial direction. The purpose of setting the mounting holes 6 is to facilitate the installation of steel bars. The purpose of setting at least two sets of symmetrical mounting holes 6 is to allow for the installation of at least four steel bars. Two of the four steel bars are symmetrical, and the other two are symmetrical. The purpose of this arrangement is that when the guide cylinder 33 needs to be installed on the engine cylinder block 1, the two symmetrical steel bars are first manually operated to screw the connecting end of the guide cylinder 33 into the reserved hole. Then, the other two symmetrical steel bars are operated to further screw the connecting end of the guide cylinder 33 into the reserved hole. This operation is repeated until the connecting end of the guide cylinder 33 is connected to the engine cylinder block 1, thereby more firmly connecting the guide cylinder 33 to the engine cylinder block 1. Compared with directly manually rotating the circumference of the guide cylinder 33 to screw the guide cylinder 33 into the reserved hole, this will further improve the connection stability between the guide cylinder 33 and the engine cylinder block 1.

[0062] In a preferred embodiment, the wrench assembly 2 further includes a plurality of fastening screws 7 threaded to the wrench; the plurality of fastening screws 7 are respectively movable along the radial direction of the sleeve hole to abut against the circumference of the main bearing bolt, so that the main bearing bolt is clamped in the sleeve hole.

[0063] like Figure 3 As shown, multiple screw holes are circumferentially formed at one end of the wrench 21 with a sleeve hole, and a first through hole is formed at the other end of the wrench 21. The first through hole is used to connect with the clamping plate connector 22. Figure 2As shown, the fastening screw 7 can be threaded into the screw hole and can move radially along the sleeve hole. By setting multiple fastening screws 7 in the circumferential direction of the wrench 21, when the sleeve hole of the wrench 21 is placed on the outside of the main bearing bolt, by tightening the fastening screw 7, the fastening screw 7 is brought closer to the center in the radial direction of the sleeve hole, so that the fastening screw 7 further abuts against the circumference of the main bearing bolt, so that the main bearing bolt is limited in the sleeve hole, thereby making the connection between the wrench 21 and the main bearing bolt more secure. When the wire rope 31 pulls the wrench 21 to rotate, the main bearing bolt can be turned, thereby realizing the quick disassembly and assembly of the main bearing bolt.

[0064] In a preferred embodiment, the clamping plate connector 22 includes a clamping plate 221 and a connector 222; the clamping plate 221 has a U-shaped structure, the first end of the clamping plate 221 is hinged to the wrench 21, and the second end of the clamping plate 221 is internally connected to the connector 222.

[0065] like Figure 2 As shown, a clamping plate 221 is connected to the bottom of the wrench 21. The clamping plate 221 has a U-shaped structure. The top of the clamping plate 221, as the first end, can be fitted over both ends of the wrench 21 and hinged to it. The clamping plate 221 can rotate relative to the wrench 21. The bottom of the clamping plate 221, as the second end, can be connected to a connecting piece 222. The connecting piece 222 can be integrated into the clamping plate 221, forming an integral structure. The connecting piece 222 is used to connect to the wire rope 31. Therefore, the wire rope 31 can pull the clamping plate 221 through the connecting piece 222, and then pull the wrench 21 through the clamping plate 221. Thus, the main bearing bolt can be disassembled or assembled by rotating the wrench 21.

[0066] Furthermore, the wrench assembly 2 also includes an elastic retaining ring 8 and a pin 9; the first end of the clamping plate 221 is hinged to the wrench 21 via the pin 9, and the elastic retaining ring 8 is connected between the first end of the clamping plate 221 and the end of the pin 9.

[0067] like Figure 3 As shown, the bottom of the wrench 21 has a first through hole, and the first end of the clamping plate 221 has a second through hole corresponding to the first through hole. A pin 9 is inserted into the first and second through holes to achieve a hinged connection between the bottom of the wrench 21 and the first end of the clamping plate 221. To further enhance the connection stability between the clamping plate 221 and the wrench 21, an elastic retaining ring 8 is connected between the end of the pin 9 and the end face of the first end of the clamping plate 221. By adding the elastic retaining ring 8, axial movement between the clamping plate 221 connected to the pin 9 and the wrench 21 is prevented, thereby effectively preventing the clamping plate 221 and the wrench 21 from becoming loose.

[0068] The connection structure between the connector 222 and the stop block 32 is not limited to the present application. The structure that can be adopted in this application is as follows:

[0069] Implementation method 1: The connector 222 has a slot, and the stop block 32 has a buckle that cooperates with the slot. The stop block 32 is snapped into the connector 222 by connecting the buckle and the slot.

[0070] The connector 222 has a hollow structure, and a slot is provided on the inner wall of the side of the connector 222 facing the stop 32. The two ends of the stop 32 have buckles that cooperate with the slot. The buckles have a certain elasticity. Therefore, when the stop 32 is inserted into the slot of the connector 222, the buckles are in a compressed state. When the stop 32 is fully inserted into the slot of the connector 222, the elastic force released by the buckles makes the stop 32 securely connected to the slot of the connector 222. When the stop 32 is fully inserted into the slot of the connector 222, the buckle part is outside the slot. The purpose is that when the stop 32 is removed, the buckle part outside the slot can be pressed to compress the buckle inside the slot, and then the stop 32 can be pulled out of the slot.

[0071] Implementation Method 2: The connector 222 has a snap-fit ​​groove that extends through the connector 222 along the axial direction, such as... Figure 2 As shown, the cross-sectional shape of the snap-fit ​​groove is T-shaped. The purpose of the T-shaped structure is that the top end face of the snap-fit ​​groove can abut against the bottom end of the connecting block 32. An opening groove is also provided on one side of the snap-fit ​​groove in the radial direction. The opening groove can communicate with the snap-fit ​​groove. The wire rope 31 can be inserted into the snap-fit ​​groove through the opening groove. The inserted end of the wire rope 31 is connected to the block 32. The bottom end of the block 32 abuts against the top end of the snap-fit ​​groove. Since the radial dimension of the snap-fit ​​groove is larger than the radial dimension of the block 32, the axial direction of the block 32 can be limited, so that the block 32 is limited in the clamping plate 221 and will not enter the snap-fit ​​groove. The extended end of the wire rope 31 can pass through the snap-fit ​​groove and the guide cylinder 33 in sequence and extend out of the engine cylinder 1.

[0072] In a preferred embodiment, the protruding end of the wire rope 31 is bent to form a circular loop 10.

[0073] like Figure 4 As shown, the left side of the wire rope 31 is the extended end, and the right side of the wire rope 31 is the inserted end; a stop block 32 is connected to the inserted end of the wire rope 31, and the stop block 32 is used to connect with the connector 222; a loop-shaped rope buckle 10 is bent at the extended end of the wire rope 31, and the rope buckle 10 is used to connect with the hoist, so as to facilitate the application of force to the wire rope 31.

[0074] Furthermore, the rope buckle 10 is connected to a fixing block 11.

[0075] like Figure 4 As shown, a fixing block 11 is connected to one end of the knot of the rope buckle 10. By setting the fixing block 11, the rope buckle 10 can be further locked to prevent the rope buckle 10 from opening, thereby improving the tightness of the rope buckle 10 of the wire rope 31.

[0076] For any parts not mentioned in this utility model, existing technologies can be used or referenced.

[0077] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0078] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A device for disassembling and assembling main bearing bolts, characterized in that, Includes a wrench assembly (2) and a pull rope assembly (3); The wrench assembly (2) includes a wrench (21) and a clamping plate connector (22); one end of the wrench (21) has a sleeve hole for fitting the main bearing bolt, and the other end of the wrench (21) is hinged to the clamping plate connector (22); The pull rope assembly (3) includes a wire rope (31), a stop block (32), and a guide cylinder (33); the end of the wire rope (31) is connected to the stop block (32), and the stop block (32) can be snapped into the clamping plate connector (22); the end of the wire rope (31) can pass through the guide cylinder (33) connected to the engine cylinder (1) and extend out of the engine cylinder (1); The guide cylinder (33) has a guide cavity (5) that can accommodate the wire rope (31). The width of the guide cavity (5) gradually increases from the side facing the insertion end of the wire rope (31) to the side facing the extension end of the wire rope (31).

2. The device for disassembling and assembling main bearing bolts according to claim 1, characterized in that, The engine cylinder (1) has a reserved hole that communicates with the interior of the engine cylinder (1) and the reserved hole has an internal thread; the guide cylinder (33) has a connecting end that protrudes from the end face and the connecting end has an external thread; the external thread of the connecting end is connected to the internal thread of the reserved hole, so that the guide cylinder (33) is connected to the outside of the engine cylinder (1).

3. The device for disassembling and assembling main bearing bolts according to claim 2, characterized in that, The connecting end is provided with a guide hole (4) that communicates with the inside of the engine cylinder (1); the guide hole (4) is connected with the guide cavity (5) to form a guide channel for threading the wire rope (31); the guide channel has an arc-shaped guide surface, so that the projection of the guide channel along the radial direction of the guide cylinder (33) is a trumpet-shaped structure.

4. The device for disassembling and assembling main bearing bolts according to claim 2, characterized in that, The guide cylinder (33) has at least two sets of symmetrical mounting holes (6) along the circumferential direction. The mounting holes (6) are used to insert steel bars, and the guide cylinder (33) is fastened to the engine cylinder block (1) by rotating the steel bars.

5. The device for disassembling and assembling main bearing bolts according to claim 1, characterized in that, The wrench assembly (2) also includes a plurality of fastening screws (7) threaded to the wrench (21); the plurality of fastening screws (7) can move in the radial direction of the sleeve hole respectively to abut against the circumference of the main bearing bolt, so that the main bearing bolt is clamped in the sleeve hole.

6. The device for disassembling and assembling main bearing bolts according to claim 1, characterized in that, The clamping plate connector (22) includes a clamping plate (221) and a connector (222); the clamping plate (221) has a U-shaped structure, the first end of the clamping plate (221) is hinged to the wrench (21), and the second end of the clamping plate (221) is internally connected to the connector (222).

7. The device for disassembling and assembling main bearing bolts according to claim 6, characterized in that, The wrench assembly (2) further includes an elastic retaining ring (8) and a pin (9); the first end of the clamping plate (221) is hinged to the wrench (21) through the pin (9), and the elastic retaining ring (8) is connected between the first end of the clamping plate (221) and the end of the pin (9).

8. The device for disassembling and assembling main bearing bolts according to claim 7, characterized in that, The connector (222) has a slot, and the stop block (32) has a buckle that cooperates with the slot. The stop block (32) is snapped into the connector (222) by connecting the buckle and the slot.

9. The device for disassembling and assembling main bearing bolts according to claim 1, characterized in that, The protruding end of the wire rope (31) is bent to form a circular loop (10).

10. The device for disassembling and assembling a main bearing bolt according to claim 9, characterized in that, The rope buckle (10) is connected to a fixing block (11).

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