Tool for guiding piston into cylinder sleeve

Abstract

The utility model relates to the technical field of high-power medium-speed diesel engine piston assembly, in particular to a tool for guiding a piston into a cylinder sleeve, which comprises a coaming and a tightening mechanism. A cylindrical structure with a C-shaped section is defined by the coamings; the tightening mechanism comprises a stress base and a tightening assembly which are arranged at the two ends of the outer side of the coaming correspondingly. The tightening assembly comprises a hinge seat arranged at one end of the coaming, a traction assembly hinged to the hinge seat and a tightening screw arranged at the end of the traction assembly and in threaded connection with the traction assembly. The tightening screw is used for abutting against the stress seat after the end of the traction assembly rotates to the side, back on to the hinge seat, of the stress seat so that the traction assembly can pull and tighten the coaming. The utility model has the advantages that through the tightening of the tightening mechanism and the cooperation of the ejector rod, the coaming is enclosed and tightened to form a conical structure with a large upper part and a small lower part, so that the clamping stagnation of a piston ring is avoided, and a piston can be conveniently guided into an air cylinder sleeve.

Description

Technical Field

[0001] The utility model relates to the technical field of piston assembly of high-power medium-speed diesel engines, in particular to a tool for guiding a piston into a cylinder liner. Background Art

[0002] With the increasing requirements for environmental protection, energy conservation and consumption reduction, in the process of improving and optimizing the power and emissions of medium-speed high-power diesel engines, new piston rings and oil rings are adopted to ensure the improvement.

[0003] The new piston rings and oil rings have great changes in terms of size and performance. The original fixed piston ring guide sleeve cannot effectively guide the piston into the cylinder liner. Especially when assembling the oil ring, it is easy to get stuck on the outer edge of the cylinder liner, resulting in the piston not being able to fall into the cylinder liner. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a tool for guiding a piston into a cylinder liner.

[0005] The purpose of the utility model is realized by the following technical solutions: A tool for guiding a piston into a cylinder liner, comprising:

[0006] A surrounding plate, the surrounding plate encloses a cylindrical structure with a C-shaped cross-section;

[0007] A tightening mechanism, the tightening mechanism includes a force-bearing seat and a tightening assembly respectively arranged at both ends of the outer side of the surrounding plate;

[0008] The tightening assembly includes a hinge seat arranged on the surrounding plate, a pulling assembly hinged to the hinge seat, and a tightening screw arranged at the end of the pulling assembly and threadedly connected to the pulling assembly. The tightening screw is used to abut against the force-bearing seat when the end of the pulling assembly rotates to the side of the force-bearing seat facing away from the hinge seat, so that the pulling assembly pulls and tightens the surrounding plate;

[0009] A push rod is arranged on the force-bearing seat, the push rod extends to the side of the force-bearing seat facing the hinge seat, and the push rod is used to abut against the hinge seat when the surrounding plate is tightened. The position of the push rod is higher than the position of the tightening screw.

[0010] When the utility model is in use, first, the surrounding plate is sleeved on the piston with the piston ring installed. Rotate the pulling assembly to make the end of the pulling assembly rotate to the side of the force-receiving seat facing away from the hinge seat, and rotate the tightening screw to make the tightening screw abut against the force-receiving seat. Continue to rotate the tightening screw to apply a reverse force to the pulling assembly by the tightening screw, so as to make the pulling assembly pull the surrounding plate to tighten the surrounding plate. After the surrounding plate is tightened to a certain extent, the ejector rod on the force-receiving seat abuts against the hinge seat. At this time, continue to rotate the tightening screw. Since the position of the ejector rod is higher than that of the tightening screw, the surrounding plate in the area below the ejector rod continues to tighten, so that the originally cylindrical surrounding plate is tightened into a conical cylinder with a larger upper part and a smaller lower part. During the process of installing the piston downward into the cylinder liner, the conical surrounding plate will force the piston ring to contract to a closed state, making the outer diameter of the piston ring smaller than the inner diameter of the cylinder liner, avoiding the piston ring being stuck on the outer edge of the cylinder liner, and enabling the piston to be smoothly assembled into the cylinder liner.

[0011] In some embodiments, the ejector rod includes a bolt. A threaded through hole is horizontally provided at the top of the force-receiving seat. The bolt is threadedly connected to the threaded through hole in the direction towards the hinge seat, and the end of the bolt is used to abut against the hinge seat. Setting the ejector rod as a bolt can adjust the distance between the hinge seat and the force-receiving seat after the ejector rod abuts against the hinge seat, and realize adjusting the taper of the surrounding plate.

[0012] In some embodiments, the pulling assembly includes a pulling member and a rotating member. The pulling member is hinged to the hinge seat. The rotating member is rotatably connected to the end of the pulling member away from the hinge seat and rotates in the horizontal direction. The tightening screw horizontally penetrates through the rotating member and is threadedly connected to the rotating member. When the gap between the two ends of the surrounding plate is relatively large, the end of the pulling member may not be able to rotate to the side of the force-receiving seat facing away from the hinge seat. In this case, through the rotating member, first rotate one end of the tightening screw to the side of the force-receiving seat facing away from the hinge seat, and then lever the tightening screw. Using the lever principle, pry the end of the pulling member to the side of the force-receiving seat facing away from the hinge seat, and achieve the effect of pre-tightening the surrounding plate.

[0013] In some embodiments, a force-receiving blind hole is provided at the position on the force-receiving seat corresponding to the abutting position of the tightening screw. The force-receiving blind hole improves the stability of the abutment when the tightening screw abuts against the force-receiving seat.

[0014] In some embodiments, a notch is provided at one end of the orifice of the force-receiving blind hole on the side away from the surrounding plate. The width of the notch is smaller than the diameter of the force-receiving blind hole and larger than the diameter of the end of the tightening screw. The notch enables the end of the tightening screw to enter the force-receiving blind hole before levering the tightening screw when pre-tightening the surrounding plate, and improves the stability of the tightening screw when levering the tightening screw.

[0015] In some embodiments, a ball head is provided at the end of the tightening screw that abuts against one end of the force-bearing seat. Since the notch is larger than the end diameter of the tightening screw, when the tightening screw is toggled during the pre-tightening of the shroud, the ball head always remains within the force-bearing blind hole without falling off, enabling the end of the tightening screw to be always connected to the force-bearing seat.

[0016] In some embodiments, a screwing head for screwing is provided at one end of the tightening screw. The screwing head facilitates the operator to screw the tightening screw.

[0017] In some embodiments, a plurality of top positioning baffles are provided at the top of the shroud. The top positioning baffles have a horizontal extension portion for limiting the piston inside the shroud. By using the top positioning baffles, the piston is prevented from sliding out of the tooling.

[0018] In some embodiments, a handle is provided on the outer side surface enclosed by the shroud. The handle facilitates holding and moving the tooling.

[0019] The present utility model has the following advantages:

[0020] The present utility model uses a tightening mechanism to tighten the shroud and cooperates with a push rod to make the shroud tighten and enclose to form a frustum-shaped structure with a larger upper part and a smaller lower part. During the process of installing the piston into the cylinder liner, through the frustum-shaped shroud, when the piston is installed downward into the cylinder liner, the piston ring or oil ring on the piston is tightened by the shroud, preventing the piston ring or oil ring from getting stuck on the outer edge of the cylinder liner and enabling the piston to be smoothly assembled into the cylinder liner. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the tooling for guiding the piston into the cylinder liner of the present utility model;

[0022] Figure 2 is Figure 1 an enlarged view of part A in

[0023] Figure 3 is a schematic structural diagram of the tightened state of the tooling for guiding the piston into the cylinder liner of the present utility model;

[0024] In the figure: 1, shroud; 2, force-bearing seat; 21, force-bearing blind hole; 211, notch; 3, hinge seat; 4, pulling assembly; 41, pulling member; 411, second notch; 42, rotating member; 5, tightening screw; 51, ball head; 52, screwing head; 6, push rod; 7, top positioning baffle; 8, handle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] In order to make the purpose, technical solutions and advantages of the present utility model more clear and understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model, that is, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Usually, the components of the embodiments of the present utility model described and shown in the accompanying drawings herein can be arranged and designed in various different configurations.

[0026] The following further describes the present utility model in conjunction with the accompanying drawings, but the protection scope of the present utility model is not limited to the following.

[0027] As Figures 1-3 shown, a tooling for guiding a piston into a cylinder liner includes a surrounding plate 1 and a tightening mechanism;

[0028] The surrounding plate 1 encloses a cylindrical structure with a C-shaped cross-section;

[0029] The tightening mechanism includes force-receiving seats 2 and tightening components respectively arranged at both ends of the outer side of the surrounding plate 1;

[0030] The tightening component includes a hinge seat 3 arranged on the surrounding plate 1, a pulling component 4 hinged to the hinge seat 3, and a tightening screw 5 arranged at the end of the pulling component 4 and threadedly connected to the pulling component 4. The tightening screw 5 is used to abut against the force-receiving seat 2 after the end of the pulling component 4 rotates to the side of the force-receiving seat 2 facing away from the hinge seat 3, so that the pulling component 4 pulls and tightens the surrounding plate 1;

[0031] A push rod 6 is arranged on the force-receiving seat 2, and the push rod 6 extends to the side of the force-receiving seat 2 facing the hinge seat 3. The push rod 6 is used to abut against the hinge seat 3 when the surrounding plate 1 is tightened, and the position of the push rod 6 is higher than the position of the tightening screw 5.

[0032] Specifically, in the embodiment, the surrounding plate 1 encloses a cylindrical structure with a break in the unused state. The force-receiving seats 2 and the hinge seats 3 are both strip-shaped structures. The force-receiving seats 2 and the hinge seats 3 are respectively vertically arranged at both ends of the surrounding plate 1, that is, on both sides of the break of the surrounding plate 1. One end of the pulling component 4 is hinged to the upper and lower ends of the hinge seat 3, and the other end of the pulling component 4 is threadedly connected with a tightening screw 5, and the tightening screw 5 faces the hinge seat 3; the position of the push rod 6 is higher than the position of the tightening screw 5.

[0033] During the use of this embodiment, first, the shroud 1 is sleeved on the piston with the piston rings installed. Rotate the pulling assembly 4 so that the end of the pulling assembly 4 rotates to the side of the force-receiving seat 2 away from the hinge seat 3. Rotate the tightening screw 5 so that the tightening screw 5 abuts against the force-receiving seat 2. At this time, continue to rotate the tightening screw 5. The tightening screw 5 abuts against the force-receiving seat 2 and pulls the pulling assembly 4 towards the force-receiving seat 2, causing the hinge seat 3 to move towards the force-receiving seat 2. The fracture of the shroud 1 begins to narrow, and the shroud 1 begins to tighten. When the shroud 1 is tightened to a certain extent, the ejector rod 6 on the force-receiving seat 2 abuts against the hinge seat 3, and the position of the ejector rod 6 on the shroud 1 no longer tightens. At this time, continue to rotate the tightening screw 5. Since the height of the position of the ejector rod 6 is higher than that of the tightening screw 5, the tightening screw 5 drives the shroud 1 at the position below the height of the ejector rod 6 to continue to tighten, causing the shroud 1 to form a conical structure with a large top opening and a small bottom opening. The bottom opening diameter of the conical structure formed by the shroud 1 is smaller than the top opening diameter of the cylinder liner. At this time, place the piston and the tooling at the top opening position of the cylinder liner and press the piston downward so that the piston moves downward into the cylinder liner. Since the opening at the bottom of the shroud 1 is small, during the downward movement of the piston, the piston ring or oil ring is tightened to the closed state. When the piston ring or oil ring reaches the bottom opening position of the shroud 1, its diameter is slightly smaller than the inner diameter of the cylinder liner and can enter the cylinder liner, thus preventing the piston ring from getting stuck on the outer edge of the cylinder liner and making the piston assembly smooth.

[0034] Preferably, the ejector rod 6 includes a bolt. A threaded through hole is horizontally provided at the top of the force-receiving seat 2. The bolt is threadedly connected to the threaded through hole in the direction towards the hinge seat 3, and the end of the bolt is used to abut against the hinge seat 3. Setting the ejector rod 6 as a bolt enables the length of the ejector rod 6 on the side of the force-receiving seat 2 facing the hinge seat 3 to be adjusted, so as to adjust the taper formed by the shroud 1 during use and enhance the applicability of the tooling.

[0035] Preferably, the pulling assembly 4 includes a pulling member 41 and a rotating member 42. The pulling member 41 is hinged to the hinge seat 3, and the rotating member 42 is rotatably connected to the end of the pulling member 41 away from the hinge seat 3 and rotates in the horizontal direction. The tightening screw 5 horizontally penetrates the rotating member 42 and is threadedly connected to the rotating member 42.

[0036] Specifically, in this embodiment, the pulling member 41 is a rectangular plate member with side plates provided on the upper and lower sides. The side plates on the upper and lower sides at one end of the pulling member 41 are respectively rotatably connected to the upper and lower ends of the hinge seat 3. A rotating member 42 is rotatably connected between the side plates on the upper and lower sides at the other end of the pulling member 41. The tightening screw 5 is threadedly connected to the middle position of the rotating member 42 in the horizontal direction and penetrates the rotating member 42. A second notch 411 is also provided on the pulling member 41 at the position corresponding to the tightening screw 5, so that the tightening screw 5 can rotate following the rotation of the rotating member 42.

[0037] When the tooling is in the tightened state, the pulling member 41 covers the hinge seat 3 and the force-receiving seat 2, and the rotating member 42 is located on the side of the force-receiving seat 2 away from the hinge seat 3.

[0038] When tightening the apron 1, due to the break in the apron 1 and the insufficient length of the pulling member 41, it may not be possible to move the rotating member 42 to the side of the force-receiving seat 2 away from the hinge seat 3 by rotating the pulling member 41. At this time, rotate the rotating member 42 so that one end of the tightening screw 5 first reaches the side of the force-receiving seat 2 away from the hinge seat 3 and abuts against the force-receiving seat 2. Then, lever the tightening screw 5. Using the lever principle, the tightening screw 5 drives the rotating member 42 to move to the side of the force-receiving seat 2 away from the hinge seat 3, while tightening the apron 1 to achieve a pre-tightening effect, and making the end of the tightening screw 5 face the hinge seat 3 to lock the tightening mechanism and prevent the tightening mechanism from coming apart.

[0039] Preferably, a force-receiving blind hole 21 is provided at the position corresponding to the abutment of the tightening screw 5 on the force-receiving seat 2. In this embodiment, the force-receiving blind hole 21 is provided on the side of the middle of the force-receiving seat 2 away from the hinge seat 3 and corresponding to the abutment position of the tightening screw 5. By providing the force-receiving blind hole 21, the tightening screw 5 abuts in the force-receiving blind hole 21, making it more stable when tightening the apron 1 and preventing the tightening screw 5 from slipping.

[0040] Preferably, a notch 211 is provided at one end of the orifice of the force-receiving blind hole 21 on the side away from the apron 1, and the width of the notch 211 is smaller than the diameter of the force-receiving blind hole 21 and larger than the diameter of the end of the tightening screw 5. By providing the notch 211 on the force-receiving blind hole 21, when using the rotating member 42 and the tightening screw 5 to pre-tighten the apron 1, during the process of levering the tightening screw 5, the end of the tightening screw 5 is always located in the force-receiving blind hole 21, preventing the tightening screw 5 from slipping when levering the tightening screw 5.

[0041] Preferably, a ball head 51 is provided at the end of the tightening screw 5 that abuts against the force-receiving seat 2.

[0042] Specifically, in this embodiment, the diameter of the ball head 51 is equal to the inner diameter of the force-receiving blind hole 21. When the end of the tightening screw 5 abuts against the force-receiving seat 2, the ball head 51 is located in the force-receiving blind hole 21.

[0043] The width of the notch 211 on the force-receiving blind hole 21 is smaller than the diameter of the force-receiving blind hole 21, making it difficult for the ball head 51 to slip out of the force-receiving blind hole 21, keeping the tightening screw 5 connected to the force-receiving seat 2 when levering the tightening screw 5 to pre-tighten the apron 1 or when the tooling is in an unused state.

[0044] Preferably, a screwing head 52 for screwing is provided at one end of the tightening screw 5. Specifically, the screwing head 52 is provided at the end of the tightening screw 5 that does not abut against the force-receiving seat 2. Through the screwing head 52, it is convenient to manually screw the tightening screw 5, improving work efficiency.

[0045] Preferably, a plurality of top positioning baffles 7 are provided at the top of the surrounding plate 1. The top positioning baffles 7 have horizontal extending portions for limiting the piston inside the surrounding plate 1. Specifically, in this embodiment, the top positioning baffle 7 includes a vertical portion and a horizontal extending portion provided at the top of the vertical portion. The vertical portion of the top positioning baffle 7 is welded to the outer side surface enclosed by the surrounding plate 1, and the horizontal extending portion of the top positioning baffle 7 extends to the top of the inner space enclosed by the surrounding plate 1. The piston is limited by the top positioning baffle 7 to prevent the piston from slipping out of the tooling from the top of the tooling.

[0046] Preferably, handles 8 are provided on the outer side surface enclosed by the surrounding plate 1. In this embodiment, two handles 8 are provided on the surrounding plate 1, and the handles 8 facilitate the staff to hold and carry the tooling or adjust the position of the tooling.

[0047] The above is only a preferred embodiment of the present invention and does not impose any form of limitation on the present invention. Any person skilled in the art can make many possible changes and modifications to the technical solution of the present invention or modify it into an equivalent embodiment with equivalent changes without departing from the scope of the technical solution of the present invention. Therefore, any changes, modifications, equivalent changes and modifications made to the above embodiments based on the technical solution of the present invention without departing from the content of the technical solution of the present invention all fall within the protection scope of this technical solution.

Claims

1. A tooling for guiding a piston into a cylinder liner, characterized in that Comprising: A surrounding plate (1), the surrounding plate (1) enclosing a cylindrical structure with a C-shaped cross-section; A tightening mechanism, the tightening mechanism including a force-receiving seat (2) and a tightening assembly respectively arranged at both outer ends of the surrounding plate (1); The tightening assembly includes a hinge seat (3) arranged on the surrounding plate (1), a pulling assembly (4) hinged to the hinge seat (3), and a tightening screw (5) arranged at the end of the pulling assembly (4) and threadedly connected to the pulling assembly (4). The tightening screw (5) is used to abut against the force-receiving seat (2) after the end of the pulling assembly (4) rotates to the side of the force-receiving seat (2) facing away from the hinge seat (3) so that the pulling assembly (4) pulls and tightens the surrounding plate (1). A push rod (6) is arranged on the force-receiving seat (2), and the push rod (6) extends to the side of the force-receiving seat (2) facing the hinge seat (3). The push rod (6) is used to abut against the hinge seat (3) when the surrounding plate (1) is tightened. The position of the push rod (6) is higher than the position of the tightening screw (5).

2. The tooling for introducing a piston into a cylinder liner according to claim 1, characterized in that The push rod (6) includes a bolt. A threaded through-hole is horizontally arranged at the top of the force-receiving seat (2). The bolt is threadedly connected to the threaded through-hole in the direction facing the hinge seat (3), and the end of the bolt is used to abut against the hinge seat (3).

3. The tooling for introducing a piston into a cylinder liner according to claim 1, characterized in that, The pulling assembly (4) includes a pulling member (41) and a rotating member (42). The pulling member (41) is hinged to the hinge seat (3). The rotating member (42) is rotatably connected to the end of the pulling member (41) away from the hinge seat (3) and rotates in the horizontal direction. The tightening screw (5) horizontally penetrates the rotating member (42) and is threadedly connected to the rotating member (42).

4. A tool for introducing a piston into a cylinder liner according to claim 3, characterized in that, A force-receiving blind hole (21) is arranged on the force-receiving seat (2) corresponding to the abutting position of the tightening screw (5).

5. A tool for guiding a piston into a cylinder liner according to claim 4, characterized in that, A notch (211) is arranged at one end of the orifice of the force-receiving blind hole (21) on the side away from the surrounding plate (1). The width of the notch (211) is smaller than the diameter of the force-receiving blind hole (21) and larger than the diameter of the end of the tightening screw (5).

6. The tooling for introducing a piston into a cylinder liner according to claim 5, characterized in that, A ball head (51) is arranged at the end of the end of the tightening screw (5) abutting against the force-receiving seat (2).

7. A tool for introducing a piston into a cylinder liner according to claim 1, characterized in that, A screwing head (52) for screwing is arranged at one end of the tightening screw (5).

8. A tool for introducing a piston into a cylinder liner according to claim 1, characterized in that, A plurality of top positioning baffles (7) are arranged at the top of the surrounding plate (1). The top positioning baffles (7) have a horizontal protruding portion for limiting the piston inside the surrounding plate (1).

9. A tool for introducing a piston into a cylinder liner according to claim 1, characterized in that, A handle (8) is arranged on the outer side surface enclosed by the surrounding plate (1).

Images