Oil pump gear tightening tool

By designing an oil pump gear tightening tool, the problems of oil seal damage and site occupation caused by removing the flywheel housing in the existing technology were solved, and the oil pump installation was achieved quickly and at low cost.

CN224373952UActive Publication Date: 2026-06-19DONGFENG CUMMINS ENGINE

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
DONGFENG CUMMINS ENGINE
Filing Date
2025-05-23
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Existing technology causes damage to the oil seal when removing the flywheel housing, increasing costs and posing a risk of leakage. It is also cumbersome to operate and occupies a lot of repair space.

Method used

A tool for tightening oil pump gears has been designed, comprising a drive plate and a clamping plate, which are connected by quick-connect pins. This tool allows for tightening of the oil pump gears directly without assembling the oil pump onto the engine, simplifying the installation process.

Benefits of technology

It enables quick tightening of the oil pump gear, saving costs, improving installation efficiency, and avoiding damage to the oil seal and space occupation.

✦ Generated by Eureka AI based on patent content.

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Abstract

This utility model relates to an oil pump gear tightening tool, comprising a drive plate, a quick-release pin, and a retaining plate. The drive plate is an L-shaped structure with cuboid ends. A rectangular through-hole is provided at the end of the L-shaped structure of the drive plate. An arc-shaped protrusion is provided at the front end of the L-shaped structure of the drive plate; the arc-shaped protrusion is used to assist in fixing the gear during installation. A first pin through-hole is provided at the corner of the drive plate. The retaining plate is a two-piece sheet structure consisting of a straight portion and an arc portion. Multiple second pin through-holes are evenly distributed on the straight portion. The ends of the arc portions are fixedly connected together by a connecting rod. The quick-release pin passes through one of the second pin through-holes and the first pin through-hole, thereby movably connecting the drive plate and the retaining plate. This utility model eliminates the need to assemble the oil pump onto the engine, allowing for quick tightening of the oil pump gear, simplifying the installation process, saving installation costs, and improving installation efficiency.
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Description

Technical Field

[0001] This utility model relates to the field of engine technology, and more specifically to an oil pump gear tightening tool. Background Technology

[0002] When the engine fuel pump malfunctions or is missing parts, the fuel pump gear is removed after the flywheel housing is removed (using lifting equipment) to replace the fuel pump, which takes 70 minutes. Removing the flywheel housing during repair will damage the oil seal, resulting in wasted oil seal costs. The disassembly and assembly of the flywheel housing requires manual removal and re-application of adhesive, resulting in wasted chemical costs and potential leakage risks. The operation is complicated and occupies a large amount of repair space.

[0003] The shortcomings of existing technology are:

[0004] 1. Due to the existing technology, the removal of the flywheel housing during repair will damage the oil seal, resulting in wasted oil seal costs. In addition, the disassembly and assembly of the flywheel housing requires manual removal and re-application of adhesive, resulting in wasted chemical costs and potential leakage risks.

[0005] 2. Due to the use of lifting equipment when removing the oil pump gear after removing the flywheel housing in the existing technology, the operation is complicated and occupies a large amount of rework space. Summary of the Invention

[0006] This utility model addresses the above-mentioned problems by providing an oil pump gear tightening tool. Its purpose is to allow for quick tightening of the oil pump gear without assembling the oil pump onto the engine, thereby simplifying the installation process, saving installation costs, and improving installation efficiency.

[0007] To solve the above problems, the technical solution provided by this utility model is as follows:

[0008] Oil pump gear tightening tool, including drive plate, quick-release pin, and retaining plate, wherein:

[0009] The drive plate is an L-shaped structure with cuboid ends; the end of the L-shaped structure of the drive plate has a rectangular through hole; the front end of the L-shaped structure of the drive plate has an arc-shaped protrusion; the arc-shaped protrusion is used to assist in fixing the gear during installation; the corner of the drive plate has a first pin through hole; the clamping plate is a sheet-like structure consisting of two pieces, each containing a straight section and an arc section; the straight section has a plurality of second pin through holes evenly distributed; the ends of the arc sections are fixedly connected together by a connecting rod; the quick-release pin passes through one of the second pin through holes and the first pin through hole, and then the drive plate and the clamping plate are movably connected.

[0010] Preferably, the second pin through hole has three holes, which are used to adjust the extension distance of the arc portion of the card plate by cooperating with the quick-release pin, thereby matching gears of different sizes.

[0011] Preferably, the length of the drive board is 101 mm.

[0012] Preferably, the rectangular through hole has a side length of 13mm; the rectangular through hole is used to connect with a force-applying tool.

[0013] Preferably, the length of the straight portion of the card plate is 48mm; the arc length of the arc portion is 48mm.

[0014] Compared with the prior art, this utility model has the following advantages:

[0015] 1. Because this utility model uses a belt wrench to fix the gear and adds an adjustable gear size buckle, the adjustment is convenient. The oil pump gear can be tightened without assembling the oil pump onto the engine, thus simplifying the installation process.

[0016] 2. Since this utility model does not require the oil pump to be assembled onto the engine, the oil pump gear can be tightened, thereby saving costs, improving installation efficiency, and saving installation space. Attached Figure Description

[0017] Figure 1 This is a side view schematic diagram of an oil pump gear tightening tool according to a specific embodiment of the present utility model;

[0018] Figure 2 This is a perspective view of an oil pump gear tightening tool according to a specific embodiment of the present invention.

[0019] The components include: 1. Drive plate, 2. Quick-connect pin, 3. Locking plate, 4. Rectangular through hole, 5. Arc-shaped protrusion structure, 6. Gear, 3.1. Straight section, 3.2. Arc section, 3.3. Second pin through hole, 3.4. Connecting rod. Detailed Implementation

[0020] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0021] like Figure 1 , Figure 2 As shown, the oil pump gear tightening tool includes a drive plate 1, a quick-release pin 2, and a retaining plate 3, wherein:

[0022] The drive plate 1 is an L-shaped structure with cuboid ends; the end of the L-shaped structure of the drive plate 1 is provided with a rectangular through hole 4; the front end of the L-shaped structure of the drive plate 1 is provided with an arc-shaped protrusion 5; the arc-shaped protrusion 5 is used to assist in fixing the gear 6 when it is installed; the corner of the drive plate 1 is provided with a first pin through hole; the clamping plate 3 is a sheet-like structure composed of two pieces including a straight part 3.1 and an arc part 3.2; the straight part 3.1 is evenly provided with a plurality of second pin through holes 3.3; the ends of the arc part 3.2 are fixedly connected together by a connecting rod 3.4; the quick pin 2 passes through a second pin through hole 3.3 and a first pin through hole, and then the drive plate 1 and the clamping plate 3 are movably connected.

[0023] It should be noted that there are three second pin through holes 3.3, which are used to adjust the extension distance of the arc part 3.2 of the card plate 3 by cooperating with the quick pin 2, thereby matching gears 6 of different sizes.

[0024] In this specific embodiment, the length of the drive board 1 is 101mm.

[0025] In this specific embodiment, the side length of the rectangular through hole 4 is 13mm; the rectangular through hole 4 is used to connect with the force-applying tool.

[0026] In this specific embodiment, the length of the straight portion 3.1 of the card plate 3 is 48mm; the arc length of the arc portion 3.2 is 48mm.

[0027] It should be noted that the working principle of this utility model is to use a belt wrench to fix the gear, and to add a quick-release pin 2 that can adjust the size of the gear, which is convenient to adjust and allows one person to quickly and safely complete the disassembly and assembly work; the oil pump gear can be tightened without assembling the oil pump onto the engine.

[0028] In the above detailed description, various features are combined together in a single embodiment to simplify this disclosure. This approach to disclosure should not be construed as reflecting an intention that embodiments of the claimed subject matter require more features than are explicitly stated in each claim. Rather, as reflected in the appended claims, the present invention is in a state with fewer features than all of the disclosed individual embodiments. Therefore, the appended claims are hereby clearly incorporated into the detailed description, wherein each claim stands alone as a preferred embodiment of the present invention.

[0029] The disclosed embodiments have been described above to enable any person skilled in the art to implement or use this invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments without departing from the spirit and scope of this disclosure. Therefore, this disclosure is not limited to the embodiments given herein, but is consistent with the widest scope of the principles and novel features disclosed in this application.

[0030] The foregoing description includes examples of one or more embodiments. It is certainly impossible to describe all possible combinations of components or methods in order to describe the above embodiments, but those skilled in the art will recognize that further combinations and arrangements of the various embodiments are possible. Therefore, the embodiments described herein are intended to cover all such changes, modifications, and variations that fall within the scope of the appended claims. Furthermore, the term "comprising" as used in the specification or claims is interpreted in a manner similar to the term "including," as interpreted when used as a conjunction in the claims. Additionally, the use of any term "or" in the specification of the claims is intended to mean "non-exclusive or."

[0031] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. An oil pump gear tightening tool characterized by: Includes a driver board (1), a quick-connect pin (2), and a card plate (3), wherein: The drive plate (1) is an L-shaped structure with cuboids at both ends; the end of the L-shaped structure of the drive plate (1) is provided with a rectangular through hole (4); the front end of the L-shaped structure of the drive plate (1) is provided with an arc-shaped protrusion (5); the arc-shaped protrusion (5) is used to assist in fixing when installing gears (6); the corner of the drive plate (1) is provided with a first pin through hole; the clamping plate (3) is a sheet structure composed of two pieces including a straight part (3.1) and an arc part (3.2); the straight part (3.1) is evenly provided with a plurality of second pin through holes (3.3); the end of the arc part (3.2) is fixedly connected together by a connecting rod (3.4); the quick pin (2) passes through a second pin through hole (3.3) and the first pin through hole, and then the drive plate (1) and the clamping plate (3) are movably connected.

2. The oil pump gear pinching tool of claim 1, wherein: The second pin through hole (3.3) is provided with three holes, which are used to adjust the extension distance of the arc portion (3.2) of the card plate (3) by cooperating with the quick pin (2), thereby matching the gears (6) of different sizes.

3. The oil pump gear tightening tool of claim 2, wherein: The length of the drive board (1) is 101 mm.

4. The oil pump gear tightening tool of claim 3, wherein: The rectangular through hole (4) has a side length of 13mm; the rectangular through hole (4) is used to connect with a force-applying tool.

5. The oil pump gear tightening tool of claim 4, wherein: The length of the straight portion (3.1) of the card plate (3) is 48 mm; the arc length of the arc portion (3.2) is 48 mm.