Oil seal installation tool

Abstract

The utility model discloses an oil seal installation tool which comprises a first shell, a second shell and a third shell, the shape of one side of the first shell is matched with the large end of a crankshaft, the first shell can be fixed to the large end of the crankshaft, and a first screw is arranged on the other side of the first shell; the first shell is located in the second shell, the second shell comprises a cylindrical side wall and a top wall, one end of the side wall is connected with the top wall, the inner diameter of the side wall is matched with the outer diameter of the large end of the crankshaft, a first through hole is formed in the second shell, the first screw can penetrate through the first through hole, and the second screw can penetrate through the first through hole. And the second shell is matched with the nut to fix the second shell on the first shell. The first shell is provided with a first screw rod, the first screw rod can penetrate through the second shell, and the second shell can be fixed to the first shell through cooperation of the first screw rod and the nut. The nut is rotated, the second shell can be slowly pushed, then the oil seal is pressed into the large end of the crankshaft, and therefore the axial installation quality of the oil seal is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of engine, in particular to an oil seal installation tool. BACKGROUND

[0002] All the parts which have liquid lubricating oil in the running body box and are connected with the outside need oil seal. The large diameter of the large engine crankshaft, the linear speed is big, easy to wear the crankshaft, the oil seal is required high, is suitable for split oil seal. The installation of split oil seal is very important, must guarantee coaxial installation, otherwise oil seal is eccentric and is not sealed. At present, the oil seal installation or maintenance of engine crankshaft adopts manual installation, and the eccentric installation of oil seal is easy to cause the eccentric wear of oil seal, so the installation quality of split oil seal is guaranteed, and the simple operation is guaranteed.

[0003] The information disclosed in this BACKGROUND section is only for the purpose of increasing the understanding of the background of the present utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms prior art that is publicly known. CONTENT OF UTILITY MODEL

[0004] The utility model aims at providing an oil seal installation tool which can guarantee the axial installation quality of split oil seal.

[0005] In order to achieve the above-mentioned purpose, the utility model provides an oil seal installation tool, which comprises: a first shell, the shape of one side of the first shell is matched with the big head of crankshaft, and the first shell can be fixed on the big head of crankshaft, and a first screw rod is arranged on the other side of the first shell; a second shell, the first shell is located in the inside of the second shell, the second shell comprises a cylindrical side wall and a top wall, one end of the side wall is connected with the top wall, the inner diameter of the side wall is matched with the outer diameter of the big head of crankshaft, a first through hole is arranged on the second shell, the first screw rod can pass through the first through hole and cooperate with a nut to fix the second shell on the first shell.

[0006] In one or more embodiments, the other end of the side wall is provided with a pushing part, the shape of the pushing part is matched with the oil seal, and the pushing part is used for pushing the oil seal.

[0007] In one or more embodiments, a plurality of second through holes are arranged on the first shell, and a plurality of second screw rods matched with the second through holes are arranged on the first shell, the second screw rods can pass through the second through holes and are connected with screw holes on the big head of crankshaft, so that the first shell is fixed on the big head of crankshaft.

[0008] In one or more embodiments, a weight-reducing hole is arranged on the first shell, and the weight-reducing hole is a blind hole arranged on one side of the first shell.

[0009] In one or more embodiments, the plurality of second through holes are centrally symmetrically distributed on the first shell.

[0010] In one or more embodiments, the number and size of the second screws match the number of the threaded holes on the big end of the crankshaft, and the number of the second through holes matches the number of the second screws.

[0011] In one or more embodiments, the first shell and the first screw are welded.

[0012] In one or more embodiments, the second shell comprises a third through hole for accommodating the second screw.

[0013] The utility model provides a kind of oil seal installation tool, first shell can be fixed on the big end of crankshaft, first shell is equipped with first screw, first screw can pass through second shell, by the cooperation of first screw and nut, second shell can be fixed on first shell. Rotate nut, second shell can be slowly pushed, and then oil seal is pressed into the big end of crankshaft, to ensure the axial installation quality of oil seal. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the schematic diagram of the oil seal installation tool provided in the utility model embodiment.

[0015] MAIN REFERENCE NUMERALS EXPLANATION:

[0016] 1-first shell, 11-first screw, 12-second through hole, 13-second screw, 14-weight reduction hole, 2-second shell, 21-side wall, 22-top wall, 23-first through hole, 24-pushing part, 3-nut. DETAILED DESCRIPTION

[0017] The specific embodiments of the utility model are described in detail below in combination with the drawings, but it should be understood that the protection scope of the utility model is not limited by the specific embodiments.

[0018] Unless otherwise explicitly indicated, in the entire specification and claims, the term "comprise" or its variants such as "include" or "comprising" and the like will be understood to include the stated element or component, without excluding other elements or components.

[0019] Embodiment one:

[0020] An oil seal installation tool, such as Figure 1As shown, it comprises: a first shell 1, one side of which matches the shape of the big end of the crankshaft and can be fixed on the big end of the crankshaft, and the other side is provided with a first screw rod 11; a second shell 2, the first shell 1 is located inside the second shell 2, the second shell 2 comprises a cylindrical side wall 21 and a top wall 22, one end of the side wall 21 is connected with the top wall 22, the inner diameter of the side wall 21 matches the outer diameter of the big end of the crankshaft, and the second shell 2 is provided with a first through hole 23, the first screw rod 11 can pass through the first through hole 23 and cooperate with a nut 3 to fix the second shell 2 on the first shell 1.

[0021] Specifically, the first shell 1 is located between the second shell 2 and the big end of the crankshaft, and the shape matches the gap between the second shell 2 and the big end of the crankshaft.

[0022] As an optional embodiment, the other end of the side wall 21 is provided with a pushing part 24, the shape of the pushing part 24 matches the oil seal, and the pushing part 24 is used to push the oil seal.

[0023] Specifically, the width of the pushing part 24 is greater than or equal to the width of the oil seal.

[0024] As an optional embodiment, the first shell 1 is provided with a plurality of second through holes 12 and a plurality of second screw rods 13 matched with the second through holes 12, the second screw rods 13 can pass through the second through holes 12 and be connected with the screw holes on the big end of the crankshaft to fix the first shell 1 on the big end of the crankshaft.

[0025] Specifically, the diameter of the second through hole 12 is greater than or equal to the diameter of the rod body of the second screw rod 13 and less than the diameter of the head of the second screw rod 13.

[0026] As an optional embodiment, the first shell 1 is provided with a weight-reducing hole 14, which is a blind hole provided on one side of the first shell 1.

[0027] Specifically, the first screw rod 11 penetrates the blind hole, and the big end of the first screw rod 11 is located in the blind hole. Since the first screw rod 11 needs to be installed, it is the most convenient method to process and install to set a blind hole on the first shell 1. After the blind hole is opened on the first shell 1, a through hole capable of accommodating the first screw rod 11 is opened at the bottom of the blind hole. The scheme that the first screw rod 11 penetrates the blind hole and then penetrates the first shell 1 can increase the stability of the side of the first shell 1 and the second shell 2 in contact, and facilitate the installation of the second shell 2, compared with directly welding the first screw rod 11 on the side of the first shell 1 and the second shell 2 in contact.

[0028] As an optional implementation, the plurality of second through holes 12 are centrally symmetrically distributed on the first shell 1.

[0029] Specifically, the outer edge of the first shell 1 in contact with the second shell 2 is circular, and the second through holes 12 are centrally symmetrically distributed on the circle, so that the first shell 1 can be connected to the crankshaft journal in a uniform force.

[0030] As an optional implementation, the number and size of the second screw rods 13 match the number of screw holes on the crankshaft journal, and the number of the second through holes 12 matches the number of the second screw rods 13.

[0031] Specifically, one second screw rod 13 corresponds to one screw hole on the crankshaft journal and one second through hole 12.

[0032] As an optional implementation, the first shell 1 and the first screw rod 11 are welded.

[0033] Specifically, the large head of the first screw rod 11 is located in the blind hole.

[0034] As an optional implementation, the second shell 2 comprises a third through hole for accommodating the second screw rod 13.

[0035] Specifically, the third through hole is arranged at a position corresponding to the second screw rod 13, and is preferably coaxial with the second through hole 12. The third through hole can also have other shapes other than a through hole, and can also be a non-communicating groove, as long as it can accommodate the head of the second screw rod 13.

[0036] By adopting the above technical solution, the first shell 1 can be fixed on the crankshaft journal, the first shell 1 is provided with the first screw rod 11, the first screw rod 11 can pass through the second shell 2, and the second shell 2 can be fixed on the first shell 1 through cooperation of the first screw rod 11 and the nut 3. By rotating the nut 3, the second shell 2 can be slowly pushed, and then the oil seal is pressed into the crankshaft journal, so that the axial installation quality of the oil seal is ensured.

[0037] Embodiment two:

[0038] The use process of the oil seal installation tool is as follows:

[0039] S1: The second screw rod 13 passes through the second through hole 12 on the first shell 1 and the screw hole on the crankshaft journal, and the second screw rod 13 is tightened to fix the first shell 1 on the second through hole 12;

[0040] S2: The first through hole 23 on the second shell 2 passes through the first screw rod 11;

[0041] S3: Slowly tighten the nut 3, slowly push the second housing 2, so that the pushing part 24 of the second housing 2 pushes the oil seal;

[0042] S4: The second housing 2 is pushed to the position, and the oil seal is installed.

[0043] The foregoing description of the specific exemplary embodiments of the present application is for the purpose of illustrating and describing, rather than limiting the application. These descriptions and examples are not intended to be exhaustive or to necessarily be limited to the precise forms disclosed. Obviously many modifications and variations are possible in light of these teachings. The exemplary embodiments were chosen and described in order to explain the principles of the application and its practical application, and to thereby enable others skilled in the art to best utilize the application, as well as various alternatives and modifications with the scope of the application intended to be defined by the following claims.

Claims

1. An oil seal installation tool characterized by, The utility model relates to a crankshaft oil seal structure, including: A first shell, one side of the first shell matches the shape of the crankshaft big head, and can be fixed on the crankshaft big head, and the other side of the first shell is equipped with a first screw rod; Second shell, the first shell is located in the inside of the second shell, and the second shell includes a cylindrical side wall and a top wall, one end of the side wall is connected with the top wall, the inner diameter of the side wall matches the outer diameter of the crankshaft big head, the second shell is equipped with a first through hole, the first screw rod can pass through the first through hole and cooperate with the nut to fix the second shell on the first shell.

2. An oil seal installation tool as claimed in claim 1, wherein The other end of the side wall is equipped with a pushing part, the shape of the pushing part matches the oil seal, and the oil seal is used for pushing the oil seal.

3. An oil seal installation tool as claimed in claim 1, wherein The first shell is equipped with a plurality of second through holes and a plurality of second screw rods matched with the second through holes, the second screw rod can pass through the second through hole and be connected with the screw hole on the crankshaft big head, and the first shell is fixed on the crankshaft big head.

4. An oil seal installation tool as claimed in claim 1, wherein The first shell is equipped with a weight reduction hole, and the weight reduction hole is a blind hole arranged on one side of the first shell.

5. An oil seal installation tool as claimed in claim 3, wherein The plurality of second through holes are distributed in the center of the first shell.

6. An oil seal installation tool as claimed in claim 3, wherein The number and size of the second screw rod match the number of screw holes on the crankshaft big head, and the number of the second through hole matches the number of the second screw rod.

7. An oil seal installation tool as claimed in claim 1, wherein The first shell and the first screw rod are welded.

8. An oil seal installation tool as claimed in claim 3, wherein The second shell includes a third through hole, and the third through hole is used for accommodating the second screw rod.

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