Disassembling and assembling device for piston ring of marine diesel engine

Abstract

The utility model belongs to the technical field of piston ring disassembly and assembly, and discloses a marine diesel engine piston ring disassembly and assembly device which comprises a fixing cover and a handle, a through groove is formed in the top of the fixing cover, fixing barrels are fixedly connected to the front face and the rear face of the fixing cover, and a two-way screw extending into the two fixing barrels is rotationally connected to the inner wall of the fixing cover. And the surface of the two-way screw rod is in threaded sleeve connection with sliding plates which slide in the two fixed cylinders respectively. An opening of a piston ring can be clamped between the two clamping jaws, in order to prevent the piston ring from falling off, a worker holds the piston ring with one hand to guarantee stability of the piston ring, then the handle is held with the other hand, the two rotating wheels are shifted to rotate, and a second gear shifts a first gear to rotate. Therefore, relative movement of the two clamping jaws is controlled through rotation of the two-way screw, the piston ring is opened and arranged on the piston head in a sleeving mode, the operation process is convenient and fast, meanwhile, the stability of the piston ring is guaranteed, and opening and closing of the piston ring can be controlled by one hand.

Description

Technical Field

[0001] The utility model belongs to the technical field of piston ring disassembly and assembly, in particular to a piston ring disassembly and assembly device for a marine diesel engine. Background Art

[0002] With the development of marine diesel engine technology and increasingly stringent environmental protection requirements in the world, various new diesel engines have appeared on the market. Each type of diesel engine has a piston rod, a piston head and a piston ring, among which the piston ring is a wear-prone part and often needs to be disassembled and reassembled for maintenance, which requires the use of piston ring disassembly and assembly tools.

[0003] According to the patent number CN116749226A, a disassembly and assembly tool for a marine diesel engine piston ring is disclosed, which includes a clamp, a guide rod, a slider, a fork clamp, a claw clamp, a baffle, an adjusting bolt, a screw rod, a guide block, a connecting rod and a handle; the clamp is placed on the guide rod, two sliders are slidably placed on both sides of the guide rod, the fork clamp is hinged with the slider, the claw clamp is connected with the fork clamp with the claw tip facing outward, two baffles are connected with the two sides of the fork clamp, the piston ring is clamped therebetween, the adjusting bolt adjusts the spacing between the two baffles to adapt to piston rings of different thicknesses, the screw rod is connected with the clamp, the guide block is connected with the screw rod and moves up and down, the lower end of the connecting rod is hinged with the guide block, and the upper end is hinged with the slider; the claw clamp hooks the overlap of the piston ring, the piston ring is stuck between the two baffles, the screw rod is rotated, the guide block moves upward and pushes the two sliders to move to both sides through the connecting rod, so that the claw clamp pushes the piston ring to open, so as to complete the loading and unloading of the piston ring. The invention can be applicable to the disassembly and assembly of piston rings of different widths, thus saving production costs, improving operation efficiency, and having the advantages of flexible use and wide application range.

[0004] In the above patents and existing known technical means, when personnel disassemble and assemble the piston ring, they need to first clamp the piston ring on the claw pliers, then hold the handle with one hand and turn the handle with the other hand. The operation is not flexible and convenient, and it is difficult to ensure the stability of the piston ring at this time, thus reducing the convenience of disassembly and assembly of the piston ring. To this end, we provide a marine diesel engine piston ring disassembly and assembly device to solve the above problems. Utility Model Content

[0005] In order to solve the problems raised in the above background technology, the utility model provides a piston ring disassembly and assembly device for a marine diesel engine.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a marine diesel engine piston ring disassembly and assembly device, comprising a fixed cover and a handle, a through groove is provided on the top of the fixed cover, the front and rear surfaces of the fixed cover are fixedly connected with fixed cylinders, the inner wall of the fixed cover is rotatably connected with a bidirectional screw extending into two fixed cylinders, the surface of the bidirectional screw is threadedly sleeved with sliding plates that slide in the two fixed cylinders respectively, one end of the two sliding plates is fixedly connected with a claw, and a transmission mechanism for driving the bidirectional screw to rotate is arranged inside the fixed cover.

[0007] The transmission mechanism includes a first gear fixedly connected to the middle part of the bidirectional screw and a second gear movably connected in the fixed cover and meshing with the first gear. The front and rear faces of the second gear are fixedly connected with rotating wheels, and both rotating wheels protrude from the outside of the through slot and are rotatably arranged on the inner wall of the fixed cover.

[0008] In the above technical solution, preferably, the bottom of the fixed cover is connected to a lubrication frame, and the bottom of the first gear is located inside the lubrication frame.

[0009] In the above technical solution, preferably, ends of the two fixed cylinders that are away from each other are both threadedly sleeved with a limiting sleeve, and the limiting sleeve does not contact the bidirectional screw.

[0010] In the above technical solution, preferably, the inner wall of the fixed cover is provided with two opposite positioning grooves, and the side surfaces of the two rotating wheels which are away from each other are rotatably connected with positioning plates, and the positioning plates are inserted into the positioning grooves.

[0011] In the above technical solution, preferably, the front and rear surfaces of the fixing cover are both threadedly connected with bolts, and the two positioning plates are detachably connected in the positioning grooves by bolts respectively.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] The utility model is provided with the handle, the fixing cover, the through groove, the fixing cylinder, the bidirectional screw, the claws, the sliding plate and the transmission mechanism. When installing the piston ring, the opening of the piston ring is first clamped between the two claws. In order to prevent the piston ring from falling, the personnel holds the piston ring to ensure the stability of the piston ring. Then the other hand holds the handle and turns the two rotating wheels to make the second gear turn the first gear, thereby realizing the rotation of the bidirectional screw to control the relative movement of the two claws, so that the piston ring is stretched and sleeved on the piston head. The operation process is not only convenient but also ensures the stability of the piston ring. Therefore, the stretching and closing of the piston ring can be controlled by one hand, and the operation is more flexible. When the piston ring on the piston head needs to be removed, the two claws are placed at the opening of the piston ring, and then the two rotating wheels are turned to gradually stretch the opening of the piston ring, so that it can be removed from the piston head. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the top view structure of the utility model;

[0016] Figure 3 It is a side cross-sectional schematic diagram of the utility model;

[0017] Figure 4 It is a connection diagram of the transmission mechanism of the utility model;

[0018] Figure 5 This is a schematic diagram of the structure of the fixed cylinder of the utility model;

[0019] Figure 6 For this utility model Figure 2 A magnified schematic diagram of the structure in the middle.

[0020] In the figure: 1, handle; 2, fixed cover; 3, fixed cylinder; 4, limit sleeve; 51, bidirectional screw; 52, claw; 53, sliding plate; 6, lubrication frame; 71, rotating wheel; 72, first gear; 73, second gear; 74, positioning plate; 75, positioning groove; 8, through groove. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] like Figures 1 to 6 As shown, the utility model provides a marine diesel engine piston ring disassembly and assembly device, including a fixed cover 2 and a handle 1, the handle 1 is fixedly connected to the fixed cover 2, so that a person can hold the handle 1 to operate it, a through groove 8 is provided on the top of the fixed cover 2, and the front and rear surfaces of the fixed cover 2 are fixedly connected to the fixed cylinder 3, the inner wall of the fixed cover 2 is rotatably connected with a bidirectional screw 51 extending into the two fixed cylinders 3, the surface of the bidirectional screw 51 is threadedly sleeved with sliding plates 53 that slide in the two fixed cylinders 3 respectively, the surfaces of the two fixed cylinders 3 are provided with grooves, so that the protruding parts of the sliding plates 53 can slide at the grooves of the fixed cylinder 3, which plays a role of limiting and guiding the movement of the sliding plates 53, one end of the two sliding plates 53 is fixedly connected with a clamping claw 52, ​​and the rotation of the bidirectional screw 51 will simultaneously drive the two sliding plates 53 to move relative to each other, further making the two clamping claws 52 approach or move away from each other, and the interior of the fixed cover 2 is provided with a transmission mechanism for driving the bidirectional screw 51 to rotate.

[0023] The transmission mechanism includes a first gear 72 fixedly connected to the middle part of the bidirectional screw 51 and a second gear 73 movably connected to the fixed cover 2 and meshing with the first gear 72, and the first gear 72 is located inside the fixed cover 2, and the front and rear faces of the second gear 73 are fixedly connected to a rotating wheel 71, and a silicone rod is provided on the surface of the rotating wheel 71 to facilitate personnel to turn the rotating wheel 71 more easily, and the two rotating wheels 71 protrude from the outside of the through groove 8 and are rotatably set on the inner wall of the fixed cover 2. Through the setting of the above structure, personnel only need one hand to operate the relative movement of the two claws 52, so as to clamp and position the piston ring. During the specific operation, the personnel first open the piston ring. The opening of the piston ring is stuck between the two claws 52. In order to prevent the piston ring from falling, the personnel can hold the piston ring to ensure its stability and ensure the accuracy of subsequent installation. Then the personnel hold the handle 1 with the other hand and turn the two rotating wheels 71 to rotate, so that the second gear 73 turns the first gear 72 to rotate, thereby realizing the rotation of the two-way screw 51 to control the relative movement of the two claws 52, to open the piston ring and put it on the piston head, which makes the operation more convenient. When the piston ring on the piston head needs to be removed, the two claws 52 are placed at the opening of the piston ring, and then the two rotating wheels 71 are turned to gradually open the opening of the piston ring, so that it can be removed from the piston head.

[0024] like Figure 1 , Figure 3 As shown, the bottom of the fixed cover 2 is connected to the lubrication frame 6, and the bottom of the first gear 72 is located inside the lubrication frame 6. The surface of the lubrication frame 6 is provided with an infusion tube for injecting grease into the lubrication frame 6. Through the setting of the lubrication frame 6, when the first gear 72 rotates, it will dip into the grease in the lubrication frame 6 and lubricate the second gear 73, so that the meshing portion between the first gear 72 and the second gear 73 is lubricated to ensure the rotation sensitivity of the first gear 72 and the second gear 73.

[0025] like Figure 1 , Figure 2 As shown, the ends of the two fixed cylinders 3 that are away from each other are both threadedly sleeved with a limiting sleeve 4, and the limiting sleeve 4 does not contact the bidirectional screw 51. The setting of the limiting sleeve 4 can limit the bidirectional screw 51. When the bidirectional screw 51 needs to be removed and replaced from the fixed cylinder 3, it is only necessary to rotate and remove the limiting sleeve 4, and then the rotating wheel 71 can be turned to drive the rotation of the first gear 72, thereby controlling the bidirectional screw 51 to move out of the fixed cylinder 3.

[0026] like Figure 4 , Figure 6As shown, the inner wall of the fixed cover 2 is provided with two opposite positioning grooves 75, and the side surfaces of the two rotating wheels 71 that are away from each other are rotatably connected with positioning plates 74, and the positioning plates 74 are inserted into the positioning grooves 75, thereby ensuring the rotational stability of the second gear 73 and the two rotating wheels 71. The front and rear surfaces of the fixed cover 2 are threadedly connected with bolts, and the two positioning plates 74 are detachably connected to the positioning grooves 75 by bolts. With the arrangement of the above structure, when the rotating wheel 71 is severely worn, the two bolts on the fixed cover 2 are removed, and then the two rotating wheels 71 are directly taken out of the fixed cover 2 for replacement or maintenance. The caliber of the through groove 8 is larger than the diameter of the rotating wheel 71, so as to facilitate the placement of the rotating wheel 71.

[0027] The working principle and use process of the utility model are as follows: when installing the piston ring, first, the personnel clamps the opening of the piston ring between the two claws 52. In order to prevent the piston ring from falling, the personnel holds the piston ring to ensure the stability of the piston ring, and then holds the handle 1 with the other hand and turns the two rotating wheels 71 to rotate, so that the second gear 73 turns the first gear 72 to rotate, thereby realizing the rotation of the two-way screw 51 to control the relative movement of the two claws 52, and the piston ring is stretched and sleeved on the piston head. The operation process is not only convenient but also ensures the stability of the piston ring. When the piston ring on the piston head needs to be removed, the two claws 52 are placed at the opening of the piston ring, and then the two rotating wheels 71 are turned to gradually stretch the opening of the piston ring, so that it can be removed from the piston head.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. Contents not described in detail in the specification belong to the prior art known to professional and technical personnel in this field.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A marine diesel engine piston ring disassembly and assembly device, comprising a fixing cover (2) and a handle (1), characterized in that: A through groove (8) is provided on the top of the fixed cover (2); the front and rear surfaces of the fixed cover (2) are fixedly connected to fixed tubes (3); the inner wall of the fixed cover (2) is rotatably connected to a bidirectional screw (51) extending into the two fixed tubes (3); the surface of the bidirectional screw (51) is threadedly sleeved with sliding plates (53) respectively sliding in the two fixed tubes (3); one end of the two sliding plates (53) is fixedly connected to a claw (52); and a transmission mechanism for driving the bidirectional screw (51) to rotate is provided inside the fixed cover (2); The transmission mechanism comprises a first gear (72) fixedly connected to the middle part of the bidirectional screw (51) and a second gear (73) movably connected in the fixed cover (2) and meshing with the first gear (72), the front and rear faces of the second gear (73) are both fixedly connected to rotating wheels (71), and the two rotating wheels (71) both protrude from the outside of the through slot (8) and are rotatably arranged on the inner wall of the fixed cover (2).

2. A marine diesel engine piston ring disassembly and assembly device according to claim 1, characterized in that: The bottom of the fixed cover (2) is connected to a lubrication frame (6), and the bottom of the first gear (72) is located inside the lubrication frame (6).

3. A marine diesel engine piston ring disassembly and assembly device according to claim 1, characterized in that: The ends of the two fixed cylinders (3) that are away from each other are both threadedly sleeved with a limiting sleeve (4), and the limiting sleeve (4) does not contact the bidirectional screw rod (51).

4. A marine diesel engine piston ring disassembly and assembly device according to claim 1, characterized in that: The inner wall of the fixed cover (2) is provided with two opposite positioning grooves (75), and the side surfaces of the two rotating wheels (71) that are away from each other are both rotatably connected with positioning plates (74), and the positioning plates (74) are inserted into the positioning grooves (75).

5. A marine diesel engine piston ring disassembly and assembly device according to claim 4, characterized in that: The front and rear surfaces of the fixed cover (2) are both threadedly connected with bolts, and the two positioning plates (74) are detachably connected in the positioning grooves (75) by bolts.

Images