Piston installation guide sleeve

Abstract

The utility model relates to the technical field of piston installation, in particular to a piston installation guide sleeve which comprises a holding part, the surface of the holding part is fixedly connected with a bottom cover, the surface of the bottom cover is provided with an observation hole, the interior of the bottom cover is movably connected with a first threaded rod, one end of the first threaded rod is fixedly connected with a grip, and the other end of the first threaded rod is fixedly connected with a piston. The other end of the first threaded rod is fixedly connected with a pressing plate, the inner wall of the holding part is connected with a spring piece in an abutting mode, a locking structure is arranged on the surface of the spring piece, two sets of auxiliary rods are movably connected into the spring piece, and the two ends of each auxiliary rod are fixedly connected with second limiting blocks. The piston ring compression device is provided with the locking structure, stepless adjustment can be carried out according to different sizes of piston rings, compression of the piston rings is sufficient, applicability is good, the grip, the first threaded rod and the pressing plate are arranged, other tools are not needed when the piston is installed, and damage to the piston is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of piston installation, and particularly relates to a piston installation guide sleeve. Background Technique

[0002] A piston is a common component in current power equipment. To prevent the piston from directly contacting the inner surface of the cylinder block, several piston rings are usually installed on the piston. The piston rings play a role in supporting and straightening the piston, and also play a sealing role. The piston rings are open rings. In the free state, the inner diameter of the piston ring is larger than the outer diameter of the piston ring groove; the outer diameter of the piston ring is larger than the inner diameter of the cylinder block, making it impossible to install the piston connecting rod group. Therefore, a conical cylinder is usually used to slowly push the piston connecting rod group.

[0003] The existing piston installation guide sleeve cannot be infinitely adjusted according to the size of the piston ring, and the piston ring may not be compressed in place, resulting in difficult assembly. Moreover, after the existing piston installation guide sleeve compresses the piston ring, tools such as hammers need to be used to gently tap the surface of the piston to install the piston into the cylinder. Carelessness may cause damage to the piston. For this reason, we propose a piston installation guide sleeve. Content of the Utility Model

[0004] In order to overcome the above technical problems, the purpose of the utility model is to provide a piston installation guide sleeve to solve the problems in the above background technique that the existing piston installation guide sleeve cannot be infinitely adjusted according to the size of the piston ring, the piston ring may not be compressed in place, resulting in difficult assembly, and after the existing piston installation guide sleeve compresses the piston ring, tools such as hammers need to be used to gently tap the surface of the piston to install the piston into the cylinder, and carelessness may cause damage to the piston.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A piston installation guide sleeve includes a holding part. The surface of the holding part is fixedly connected with a bottom cover. An observation hole is opened on the surface of the bottom cover. A first threaded rod is movably connected inside the bottom cover. One end of the first threaded rod is fixedly connected with a handle, and the other end of the first threaded rod is fixedly connected with a pressing plate. A spring piece is abutted and connected to the inner wall of the holding part. A locking structure is arranged on the surface of the spring piece. The locking structure includes two rotating blocks. The bottoms of the two rotating blocks are respectively rotatably connected with two rotating shafts. A second threaded rod is movably connected inside the two rotating blocks. One end of the second threaded rod is fixedly connected with a knob, and the other end of the second threaded rod is fixedly connected with a first limiting block. Two auxiliary rods are movably connected inside the spring piece, and the two ends of the auxiliary rods are fixedly connected with second limiting blocks.

[0006] Preferably, a first thread groove is opened on the surface of the bottom cover, and the first threaded rod is rotatably connected with the bottom cover through the thread groove.

[0007] Preferably, a rubber cushion layer is provided on the surface of the pressing plate away from the first threaded rod.

[0008] Preferably, both ends of the spring piece are bent in the same direction to make the spring piece cylindrical, and the two ends of the spring piece do not touch, and the outer wall of the spring piece abuts against the inner wall of the holding part.

[0009] Preferably, two sets of circular grooves one are respectively opened at both ends of the spring piece, and both ends of the auxiliary rod are rotatably connected in the circular grooves one. The auxiliary rod is bent, and the radius of the second limiting block is greater than the radius of the auxiliary rod.

[0010] Preferably, two sets of square grooves are opened on the surface of the spring piece, and both ends of the two rotating shafts are respectively fixedly connected to the inner wall surfaces of the two square grooves, and the two rotating blocks are respectively rotatably connected in the square grooves.

[0011] Preferably, a circular groove two is opened on the surface of one of the rotating blocks, and a threaded groove two is opened on the surface of the other rotating block. Both ends of the second threaded rod penetrate through the two rotating blocks through the circular groove two and the threaded groove two respectively. The diameters of the knob and the first limiting block are equal, and the diameter of the second threaded rod is smaller than the diameters of the knob and the first limiting block.

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

[0013] 1. The piston installation guide sleeve is provided with a locking structure. The guide sleeve is sleeved on the outside of the piston and pressed against the surface of the cylinder barrel. Rotating the knob drives the second threaded rod to rotate. Through the threaded groove two, the rotating block on one side of the first limiting block moves towards the rotating block on the side of the knob. The spring piece is pulled through the rotating shaft, so that the two ends of the spring piece approach each other, thereby compressing the piston ring on the piston. It can be infinitely adjusted according to the different sizes of the piston rings, and the piston rings are compressed sufficiently, and the applicability is good.

[0014] 2. The piston installation guide sleeve is provided with a handle, a first threaded rod and a pressing plate. After the piston ring is fully compressed, the first threaded rod is rotated through the handle, and then the pressing plate is driven to move. The positions of the pressing plate and the piston surface can be observed through the observation hole. As the first threaded rod rotates, the pressing plate pushes the piston into the cylinder, without the need for other tools to assist, avoiding damage to the piston. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a front view schematic diagram of the structure of the present utility model;

[0016] Figure 2 is an exploded schematic diagram of the structure of the present utility model;

[0017] Figure 3It is a partial structural sectional view of the present utility model;

[0018] Figure 4 It is a structural sectional view of the spring piece of the present utility model;

[0019] Figure 5 It is an exploded structural schematic diagram of the locking structure of the present utility model.

[0020] In the figure: 1. Holding part; 2. Bottom cover; 3. Observation hole; 4. First threaded rod; 5. Handle; 6. Pressure plate; 7. Spring piece; 8. Locking structure; 81. Rotating block; 82. Rotating shaft; 83. Second threaded rod; 84. Knob; 85. First limiting block; 9. Auxiliary rod; 10. Second limiting block. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] Please refer to Figures 1-5 , an embodiment provided by the present utility model:

[0023] A piston installation guide sleeve, comprising a holding part 1, the surface of the holding part 1 is fixedly connected with a bottom cover 2, an observation hole 3 is opened on the surface of the bottom cover 2, a first threaded rod 4 is movably connected inside the bottom cover 2, one end of the first threaded rod 4 is fixedly connected with a handle 5, the other end of the first threaded rod 4 is fixedly connected with a pressing plate 6, the inner wall of the holding part 1 is abutted and connected with a spring piece 7, a locking structure 8 is arranged on the surface of the spring piece 7, the locking structure 8 includes two rotating blocks 81, the bottoms of the two rotating blocks 81 are respectively rotatably connected with two rotating shafts 82, a second threaded rod 83 is movably connected inside the two rotating blocks 81, one end of the second threaded rod 83 is fixedly connected with a knob 84, the other end of the second threaded rod 83 is fixedly connected with a first limiting block 85, two auxiliary rods 9 are movably connected inside the spring piece 7, and both ends of the auxiliary rods 9 are fixedly connected with second limiting blocks 10. The locking structure 8 is provided. The guide sleeve is sleeved outside the piston and pressed on the surface of the cylinder barrel. Rotating the knob 84 drives the second threaded rod 83 to rotate. Through the second threaded groove, the rotating block 81 on one side of the first limiting block 85 moves towards the rotating block 81 on the side of the knob 84. The spring piece 7 is pulled through the rotating shaft 82, so that both ends of the spring piece 7 are close to each other, thereby compressing the piston ring on the piston. It can be infinitely adjusted according to the different sizes of the piston rings, the piston ring is fully compressed, and the applicability is good. The handle 5, the first threaded rod 4 and the pressing plate 6 are provided. After the piston ring is fully compressed, the first threaded rod 4 is rotated through the handle 5, thereby driving the pressing plate 6 to move. The position of the pressing plate 6 and the piston surface can be observed through the observation hole 3. As the first threaded rod 4 rotates, the pressing plate 6 pushes the piston into the cylinder, without the need for other tools to assist, avoiding damage to the piston.

[0024] Further, a first threaded groove is opened on the surface of the bottom cover 2, and the first threaded rod 4 is rotatably connected with the bottom cover 2 through the threaded groove. The first threaded rod 4 is rotated through the handle 5, thereby driving the pressing plate 6 to move.

[0025] Further, a rubber cushion layer is arranged on the surface of the pressing plate 6 away from the first threaded rod 4. When the piston is pushed by the pressing plate 6, damage to the piston is avoided, and the friction between the two is increased.

[0026] Further, both ends of the spring piece 7 are bent in the same direction so that the spring piece 7 is cylindrical, both ends of the spring piece 7 do not contact, the outer wall of the spring piece 7 abuts against the inner wall of the holding part 1, and the friction between the spring piece 7 and the holding part 1 prevents the two from slipping off.

[0027] Further, two first circular grooves are respectively opened at both ends of the spring piece 7, both ends of the auxiliary rod 9 are rotatably connected in the first circular grooves, the auxiliary rod 9 is bent, and the radius of the second limiting block 10 is greater than the radius of the auxiliary rod 9. When adjusting the spring piece 7, the spring piece 7 is assisted through the auxiliary rod 9 to prevent the spring piece 7 from shifting.

[0028] Further, two sets of square grooves are formed on the surface of the spring piece 7. The two ends of the two sets of rotating shafts 82 are respectively fixedly connected to the inner wall surfaces of the two sets of square grooves. The two sets of rotating blocks 81 are respectively rotatably connected in the square grooves. When the spring piece 7 is adjusted by the locking structure 8, during the process that the two sets of rotating blocks 81 approach each other, they can rotate around the rotating shafts 82, so that the two sets of rotating blocks 81 always remain parallel.

[0029] Further, a second circular groove is formed on the surface of one set of rotating blocks 81, and a second threaded groove is formed on the surface of the other set of rotating blocks 81. The two ends of the second threaded rod 83 respectively penetrate through the two sets of rotating blocks 81 through the second circular groove and the second threaded groove. The diameters of the knob 84 and the first limiting block 85 are equal, and the diameter of the second threaded rod 83 is smaller than the diameters of the knob 84 and the first limiting block 85. The knob 84 and the first limiting block 85 limit the maximum moving distance of the rotating blocks 81 on the second threaded rod 83.

[0030] Working principle: When installing the piston, after inserting the piston pin at the tail of the piston into the cylinder, sleeving the guide sleeve on the outside of the piston and pressing it against the surface of the cylinder barrel, rotating the knob 84 drives the second threaded rod 83 to rotate. Through the second threaded groove, the rotating block 81 on one side of the first limiting block 85 moves towards the rotating block 81 on the side of the knob 84. The spring piece 7 is pulled through the rotating shaft 82, so that the two ends of the spring piece 7 approach each other, thereby compressing the piston ring on the piston. Rotating the first threaded rod 4 through the handle 5, thereby driving the pressing plate 6 to move. The position of the pressing plate 6 and the surface of the piston can be observed through the observation hole 3. As the first threaded rod 4 rotates, the pressing plate 6 pushes the piston into the cylinder, completing the installation of the piston.

[0031] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes falling within the meaning and scope of the equivalent elements of the claims in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A piston installation guide sleeve, comprising a gripping portion (1), characterized in that: The surface of the gripping portion (1) is fixedly connected to a bottom cover (2), and an observation hole (3) is provided on the surface of the bottom cover (2). A threaded rod (4) is movably connected inside the bottom cover (2). One end of the threaded rod (4) is fixedly connected to a grip (5), and the other end of the threaded rod (4) is fixedly connected to a pressure plate (6). The inner wall of the gripping portion (1) is abutted against a spring sheet (7), and a locking structure (8) is provided on the surface of the spring sheet (7). The locking structure (8) includes two The two groups of rotating blocks (81) are rotatably connected at the bottom of the two groups of rotating blocks (81) respectively, and the two groups of rotating blocks (81) are internally movably connected with threaded rods (83), one end of the threaded rods (83) is fixedly connected with a knob (84), and the other end of the threaded rods (83) is fixedly connected with a limiting block (85), and the spring sheet (7) is internally movably connected with two groups of auxiliary rods (9), and the two ends of the auxiliary rods (9) are fixedly connected with the limiting block (10).

2. A piston installation guide sleeve according to claim 1, characterized in that: A threaded groove one is provided on the surface of the bottom cover (2), and the threaded rod one (4) is rotatably connected to the bottom cover (2) via the threaded groove.

3. The piston installation guide sleeve according to claim 1, characterized in that: A rubber cushion layer is provided on the surface of one side of the pressing plate (6) away from the threaded rod (4).

4. A piston installation guide sleeve according to claim 1, characterized in that: The two ends of the spring sheet (7) are bent in the same direction so that the spring sheet (7) is cylindrical, the two ends of the spring sheet (7) are not in contact, and the outer wall of the spring sheet (7) is in contact with the inner wall of the gripping portion (1).

5. The piston installation guide sleeve according to claim 1, characterized in that: Two groups of circular grooves (1) are respectively formed at the two ends of the spring sheet (7), the two ends of the auxiliary rod (9) are rotatably connected in the circular grooves (1), the auxiliary rod (9) is bent, and the radius of the second limit block (10) is greater than the radius of the auxiliary rod (9).

6. The piston installation guide sleeve according to claim 1, characterized in that: The surface of the spring sheet (7) is provided with two groups of square grooves, the two ends of the two groups of rotating shafts (82) are respectively fixedly connected to the inner wall surfaces of the two groups of square grooves, and the two groups of rotating blocks (81) are respectively rotatably connected in the square grooves.

7. The piston installation guide sleeve according to claim 1, characterized in that: A second circular groove is formed on the surface of one group of rotating blocks (81), and a second thread groove is formed on the surface of another group of rotating blocks (81). Two ends of the second threaded rod (83) pass through the two groups of rotating blocks (81) through the second circular groove and the second thread groove respectively. The diameters of the knob (84) and the first limit block (85) are equal, and the diameter of the second threaded rod (83) is smaller than the diameters of the knob (84) and the first limit block (85).

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