Piston ring mounting tool

Abstract

The utility model discloses a piston ring mounting tool, which belongs to the technical field of piston ring assembly, and particularly comprises a guide sleeve and a push cylinder which is coaxial with the sleeve and sleeved outside the push cylinder, the guide sleeve is a hollow frustum, the large-diameter end of the guide sleeve can be sleeved outside a workpiece, and a positioning part used for abutting against the end face of the workpiece is arranged in the guide sleeve. According to the scheme, the guide sleeve and the push cylinder are arranged, the guide sleeve is positioned on the workpiece through cooperation of the positioning part and the guide sleeve, then the piston ring is arranged from the small-diameter end of the guide sleeve in a sleeving mode, the piston ring is pushed into the annular groove of the workpiece from the guide sleeve through the push cylinder, and the expansion amount of the piston ring can be effectively controlled in the process; the deformation amplitude is controllable, and the assembly quality of the piston ring is ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to piston ring assembly technical field, especially, a kind of piston ring installation tool. BACKGROUND

[0002] Piston ring is a kind of metal elastic ring with large outward expansion deformation, it is assembled to the corresponding annular groove of section face.It is sealed between the outer circle of ring and cylinder and one side of ring and annular groove by the pressure difference of gas or liquid for reciprocating and rotating piston ring.

[0003] At present, the assembly of piston ring is mostly assembled manually, and in manual assembly, the usual practice is to make the piston ring shaft expand radially so that it is set on the corresponding workpiece and slides downward, and finally it can be slid into the annular groove.

[0004] Applicant found that, affected by the width of piston ring end face, etc., the force of opening the piston ring in radial direction cannot be well controlled during manual assembly, and the piston ring may be twisted in axial direction, which may cause deformation damage or deformation of the piston ring, seriously affecting the sealing effect. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of piston ring installation tool to solve the problems raised in the above background.

[0006] To achieve the above object, the utility model employs one technical scheme: a kind of piston ring installation tool, including guide sleeve and the sleeve set in the push cylinder outside with the coaxial sleeve of push cylinder, the guide sleeve is a hollow conical table, and its large diameter end can be set on the workpiece, the guide sleeve is provided with the positioning part for abutting workpiece end face in it.

[0007] Preferably, the position of the positioning part in the axial direction of guide sleeve is adjustable.

[0008] Preferably, a connecting block is provided in the guide sleeve, a threaded hole coaxial with the guide sleeve is formed on the connecting block, a positioning bolt is threadedly connected in the threaded hole, and the positioning part is the end face of the positioning bolt.

[0009] Preferably, the guide sleeve is open at both ends, and the end of the positioning bolt is arranged towards the small diameter end of the guide sleeve.

[0010] Preferably, a positioning sleeve is provided at the large diameter end of the guide sleeve, the positioning sleeve is matched with the shape of the side peripheral wall of the workpiece and can be set on the workpiece, and the connection between the positioning sleeve and the guide sleeve is smoothly transitioned.

[0011] Preferably, the pushing barrel comprises two half-barrels hingedly connected to each other, the two half-barrels are combined into a hollow conical frustum with a larger diameter at the small-diameter end than the outer diameter of the guide sleeve, and the two half-barrels are combined by an elastic member.

[0012] Preferably, the wall thickness of the positioning sleeve is less than 1 mm.

[0013] The utility model discloses the beneficial effect of: the scheme is through setting up guide sleeve and pushing barrel, through the cooperation of positioning part and guide sleeve makes its location on workpiece, subsequently, the piston ring is from the small-diameter end of guide sleeve and is set into, and through pushing barrel, the piston ring is pushed into the annular groove of workpiece from guide sleeve, and this process can effectively control the expansion of the piston ring, and the deformation range is controllable, guarantees the assembly quality of piston ring.

[0014] Among them, through setting up positioning sleeve, can effectively promote the stability of the positioning of tool;

[0015] Among them, through setting up adjustable position's positioning part, can make this tool can be positioned to the annular groove position of different positions, has promoted the applicability of this scheme;

[0016] Among them, the positioning bolt end part setting in this scheme towards, can be debugged after setting positioning sleeve on workpiece, is convenient for observing adjustment amount;

[0017] Among them, through setting up the pushing barrel as two half-barrels of conical body after combining, like this, in the use process, can make the small-diameter end of pushing barrel when setting on sleeve can more degree with positioning sleeve, ensure that it can guarantee the end face of piston ring when facing the end face of relatively narrow piston ring also can guarantee that it can be in contact with the end face of piston ring, this setting scheme is especially applicable to the scheme of guide sleeve whole conical. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the structure diagram of the utility model Figure 1 ;

[0019] Figure 2 It is the sectional view of the utility model Figure 1 ;

[0020] Figure 3 It is the structure diagram of the utility model two half-barrels when opening;

[0021] Figure 4 It is the structure diagram of the utility model two half-barrels when closing;

[0022] Figure 5 It is the structure diagram of piston ring;

[0023] In the figure: 1, guide sleeve; 11, connecting block; 2, push cylinder; 21, half bucket; 22, fixed groove; 23, elastic piece; 24, folding page; 3, positioning sleeve; 4, positioning bolt; 5, workpiece; 6, piston ring. DETAILED DESCRIPTION

[0024] The advantages and features of the present application will be more apparent from the following detailed description of the preferred embodiments of the present application, with reference to the accompanying drawings, so that the scope of protection of the present application can be more clearly defined.

[0025] Embodiment:

[0026] Referring to Figure 1 , Figure 2 , Figure 5 , a piston ring installation tool, comprising a guide sleeve 1 and a push cylinder 2 coaxially sleeved outside the push cylinder 2, the guide sleeve 1 is a hollow conical frustum, and the large diameter end thereof can be sleeved outside the workpiece 5, and a positioning portion for abutting against the end face of the workpiece 5 is arranged in the guide sleeve 1.

[0027] Among them, the large diameter end of the guide sleeve 1 is provided with a positioning sleeve 3, the positioning sleeve 3 is matched with the shape of the side wall of the workpiece 5 and can be sleeved on the workpiece 5, and the connection between the positioning sleeve 3 and the guide sleeve 1 is smoothly transitioned, and the preferred scheme is that the wall thickness of the positioning sleeve 3 is less than 1mm, so that the expansion amount of the piston ring 6 can be effectively reduced, and theoretically, the thinner the thickness is, the better it is, as long as the positioning sleeve 3 is not scratched.

[0028] Among them, the position of the positioning portion in the axial direction of the guide sleeve 1 is adjustable;

[0029] Specifically, a connecting block 11 is arranged in the guide sleeve 1, a threaded hole coaxial with the guide sleeve 1 is formed in the connecting block 11, a positioning bolt 4 is threadedly connected in the threaded hole, and the positioning portion is the end face of the positioning bolt 4, wherein the connecting block 11 and the guide sleeve 1 are integrally formed, the positioning bolt 4 is a hexagonal bolt, and the preferred design scheme is that the guide sleeve 1 is open at both ends, and the end portion of the positioning bolt 4 is arranged towards the small diameter end of the guide sleeve 1.

[0030] Among them, referring to Figure 3 , Figure 4The pushing barrel 2 comprises two half-barrels 21 hinged to each other, and the connection of the two parts can be achieved by using a hinge 24, wherein the shape of the two half-barrels 21 after being spliced is a hollow conical frustum, and the small-diameter end of the hollow conical frustum has a larger diameter than the small-diameter end of the guide sleeve 1, and the two half-barrels 21 are spliced by an elastic member 23, specifically, a ring-shaped fixing groove 22 can be formed on the side wall of the half-barrel 21 body, and the elastic member 23 can be a rubber band type elastic article sleeved in the fixing groove 22, of course, in other embodiments, the two half-barrels 21 can be spliced by a spring or other elastic member 23, by adopting the above structure, in the use process, the small-diameter end of the pushing barrel 2 can be more closely fitted with the positioning sleeve 3 when the pushing barrel 2 is sleeved on the sleeve, and it is ensured that the small-diameter end of the pushing barrel 2 can be in contact with the end face of the piston ring 6 when the piston ring 6 has a relatively narrow end face, and the setting scheme is especially suitable for the scheme that the guide sleeve 1 is a whole cone.

[0031] The above is only an embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structural transformation, direct or indirect application in other related technical fields by using the content of the present application specification and drawings are also included in the patent protection range of the present application.

Claims

1. A piston ring installation tool characterized by: The device comprises a guide sleeve (1) and a push sleeve (2) coaxial with the sleeve and sleeved outside the push sleeve (2), the guide sleeve (1) is a hollow frustum, and the large-diameter end of the guide sleeve (1) can be sleeved outside a workpiece (5), and a positioning part is arranged in the guide sleeve (1) and used for abutting against an end face of the workpiece (5).

2. A piston ring installation tool as claimed in claim 1, characterized in that: A positioning sleeve (3) is arranged at the large-diameter end of the guide sleeve (1), the positioning sleeve (3) is matched with the shape of the side wall of the workpiece (5) and can be sleeved on the workpiece (5), and the connection between the positioning sleeve (3) and the guide sleeve (1) is smoothly transitioned.

3. A piston ring installation tool as claimed in claim 2, wherein: The position of the positioning part in the axial direction of the guide sleeve (1) is adjustable.

4. A piston ring installation tool as claimed in claim 3, wherein: A connecting block (11) is arranged in the guide sleeve (1), a threaded hole coaxial with the guide sleeve (1) is formed in the connecting block (11), a positioning bolt (4) is threadedly connected in the threaded hole, and the positioning part is the end face of the positioning bolt (4).

5. A piston ring installation tool as claimed in claim 4, wherein: The guide sleeve (1) is open at both ends, and the end of the positioning bolt (4) is arranged towards the small-diameter end of the guide sleeve (1).

6. A piston ring installation tool as defined in claim 1, wherein: The push sleeve (2) comprises two half barrels (21) hingedly connected to each other, the shape of the two half barrels (21) after being spliced is a hollow frustum, the small-diameter end of the hollow frustum is larger in diameter than the outer diameter of the small-diameter end of the guide sleeve (1), and the two half barrels (21) are spliced by being close to each other through an elastic member (23).

7. A piston ring installation tool as defined in claim 2 wherein: The wall thickness of the positioning sleeve (3) is less than 1 mm.

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