Oil outlet guide pipe of automobile oil pump

Abstract

The utility model relates to the technical field of automobile oil pump parts, and discloses an oil outlet guide pipe of an automobile oil pump. A through hole is formed in a pipe body in the axial direction in a penetrating mode, a centering step is arranged on the inner wall of the through hole, a centering hole matched with the outer diameter of a copper sleeve is formed in the center of the step, the copper sleeve is in clearance or interference fit with the centering hole, and a notch for a medium to pass through is formed in the outer ring of the centering hole. According to the oil outlet guide pipe, accurate centering of the copper sleeve and the guide pipe is achieved, shaking of the copper sleeve and the guide pipe during working is reduced, and the reliability of an automobile fuel supply system is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile oil pump parts, in particular to an oil outlet guide pipe of automobile oil pump. BACKGROUND

[0002] In the automobile fuel supply system, the oil outlet guide pipe of automobile oil pump plays a vital role, and its cooperation with the copper bush directly affects the stability and reliability of fuel delivery. At present, the common assembly mode of the oil outlet guide pipe of automobile oil pump and the copper bush is a mutual sleeving structure, that is, there is a gap between the outer wall of the copper bush and the inner wall of the oil outlet guide pipe, which is used for the passage of fuel and other media (such as shown in the figure). Due to the structure and cooperation relationship of the two, many drawbacks are exposed in the actual application process. Figure 5

[0003] On the one hand, since the copper bush and the oil outlet guide pipe only rely on the gap cooperation between the outer wall and the inner wall, it is difficult to realize the accurate centering of the two during assembly. On the other hand, the existence of the gap makes the copper bush and the oil outlet guide pipe prone to relative shaking during work.

[0004] In order to solve the above problems, the application provides an oil outlet guide pipe of automobile oil pump. CONTENT OF THE UTILITY MODEL

[0005] The utility model provides an oil outlet guide pipe of automobile oil pump in view of the deficiency in the background art.

[0006] The technical scheme adopted by the utility model is: an oil outlet guide pipe of automobile oil pump, comprising a pipe body, an axial through hole is arranged in the pipe body, a centering step is arranged on the inner wall of the through hole, a centering hole matched with the outer diameter of the copper bush is arranged at the center of the centering step, the copper bush and the centering hole are gap matched, and a gap for medium passage is arranged on the outer circle of the centering hole.

[0007] Further, the centering step is arranged at the position close to the end of the pipe body.

[0008] Further, the gap between the copper bush and the centering hole is +0.02~+0.05mm.

[0009] Further, the gap is three, and the three gaps are arranged on the outer side of the centering step along the circumference.

[0010] Further, the gap extends from the centering step to the inner wall of the through hole, the gap is a "U" type structure, and the opening is smoothly transitioned to the inner wall of the centering hole through a circular arc.

[0011] Further, the axial thickness of the centering step is 0.5-2cm.

[0012] The utility model has the advantages that:​

[0013] 1. Precise centering: The patent sets a centering step on the inner wall of the through hole of the oil outlet conduit, and a centering hole with the same diameter as the copper sleeve is opened in the center of the centering step. In the assembly process, the copper sleeve can be accurately fitted into the centering hole, compared with the traditional method of relying only on the gap between the outer wall and the inner wall, the problem of difficult precise centering during assembly is fundamentally solved.

[0014] 2. Reduce shaking: Because the centering hole and the copper sleeve fit closely, the relative shaking of the copper sleeve and the oil outlet conduit during work is greatly limited. Compared with the shaking problem caused by the gap in the prior art, the reduction of shaking significantly reduces the wear degree between the copper sleeve and the oil outlet conduit.

[0015] 3. Improve system reliability: The two advantages of precise centering and reducing shaking work together to comprehensively improve the performance of the oil outlet conduit of the automobile oil pump, and thus enhance the reliability of the entire automobile fuel supply system.

[0016] In addition to the purposes, features and advantages described above, the present utility model has other purposes, features and advantages. The present utility model will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present utility model.

[0018] Figure 2 It is Figure 2 It is a structural schematic diagram of the copper sleeve.

[0019] Figure 3 It is a cross-sectional schematic diagram of the present utility model after being connected with the copper sleeve.

[0020] Figure 4 It is a schematic diagram of the end face of the pipe body.

[0021] Figure 5 It is a cross-sectional schematic diagram of the oil outlet conduit and the copper sleeve after being connected in the prior art.

[0022] Figures 1-5 Center: 1, pipe body; 2, through hole; 3, centering step; 4, centering hole; 5, notch; 6, circular arc; 7 copper sleeve. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0024] It should be noted that if the embodiments of the utility model have directionality indication (such as up, down, left, right, front, back), the directionality indication is only used to explain the relative position relationship, movement condition and the like between components in a certain specific posture (as shown in the drawings), if the specific posture changes, then the directionality indication also changes accordingly.

[0025] The utility model provides a kind of oil outlet conduit of automobile oil pump.

[0026] In the embodiment, referring to Figures 1-5 The oil outlet conduit of the automobile oil pump includes a pipe body 1, a through hole 2 is provided through the pipe body 1 in the axial direction, a centering step 3 is provided on the inner wall of the through hole, a centering hole 4 with an outer diameter matching that of a copper bushing 7 is provided at the center of the centering step 3, the copper bushing and the centering hole are in clearance fit, and a gap 5 for medium passage is provided on the outer ring of the centering hole.

[0027] In the above technical solution, the centering step is provided on the inner wall of the pipe body through hole, the centering hole with a diameter matching that of the copper bushing is provided at the center of the centering step, the copper bushing and the centering hole are in clearance fit, and the gap for medium passage is provided on the outer ring of the centering hole. The copper bushing is accurately positioned in the oil outlet conduit through the centering step and the centering hole, the clearance fit ensures the stability of the connection between the copper bushing and the centering hole, and the gap provides a flow passage for the medium.

[0028] The precise centering of the copper bushing and the oil outlet conduit is achieved, the difficulty in centering caused by the lack of effective centering structure in the traditional assembly method is avoided, and the relative position stability of the copper bushing and the oil outlet conduit during operation is ensured, avoiding the problem of shaking of the two.

[0029] Specifically, the centering step is arranged at a position close to the end of the pipe body; and the clearance between the copper bushing and the centering hole is +0.02~+0.05mm.

[0030] In the embodiment, the clearance between the copper bushing and the centering hole is limited to +0.02~+0.05mm, which is a specific clearance range designed accurately. Within this clearance range, the copper bushing has a certain amount of movement in the centering hole to compensate for the slight deviation caused by processing errors and other factors, and the relative stability between the copper bushing and the centering hole during operation is ensured, avoiding shaking caused by excessive clearance.

[0031] Specifically, the gap is three, and the three gaps are arranged in a circumferential direction along the outer side of the centering step.

[0032] In the embodiment, three gaps are arranged and distributed in a circumferential direction along the outer side of the centering step. The uniform distribution design can ensure the uniformity of the flow rate and pressure distribution of the medium in the oil outlet conduit when the medium passes through the gap.

[0033] Specifically, the notch extends from the centering step to the inner wall of the through hole, and the notch is a "U" type structure, and the opening is smoothly connected to the inner wall of the centering hole through a circular arc.

[0034] In the embodiment, the notch extends from the centering step to the inner wall of the through hole, and the notch is a "U" type structure, and the opening is smoothly connected to the inner wall of the centering hole through a circular arc. The "U" type structure provides a larger flow space for the medium, and the circular arc transition can reduce the resistance of the medium when passing through the notch, so that the medium flows more smoothly.

[0035] Specifically, the axial thickness of the centering step is 0.5-2cm.

[0036] In the embodiment, the thickness of the centering step is limited to 0.5-2cm, and the appropriate thickness can ensure that the centering step has sufficient strength to support and position the copper sleeve.

[0037] Skilled persons should know: although the utility model has been described according to the above specific embodiments, the utility model idea is not limited to this utility model, and any modification using the utility model idea will be included in the patent protection range.

Claims

1. An oil outlet conduit of an oil pump for an automobile, comprising a pipe body, a through hole being provided through the pipe body in an axial direction, characterized in that: The inner wall of the through hole is provided with a centering step, a centering hole matched with the outer diameter of the copper sleeve is arranged at the center of the centering step, the copper sleeve and the centering hole are in clearance fit, and an annular gap is arranged outside the centering hole.

2. The oil outlet conduit of an automotive oil pump according to claim 1, characterized in that: The centering step is arranged at a position close to the end of the pipe body.

3. The oil outlet conduit of an automotive oil pump according to claim 1, characterized by: The clearance between the copper sleeve and the centering hole is +0.02 to +0.05 mm.

4. The oil outlet conduit of an automotive oil pump according to claim 1, characterized by: The annular gap is three, and the three annular gaps are arranged in a circumferential direction on the outer side of the centering step.

5. The oil outlet conduit of an automotive oil pump according to claim 1 or 4, characterized by: The annular gap extends from the centering step to the inner wall of the through hole, and the annular gap is a "U" type structure, and the opening is smoothly connected to the inner wall of the centering hole through a circular arc.

6. The oil outlet conduit of an automotive oil pump according to claim 1 or 4, characterized by: The axial thickness of the centering step is 0.5-2 cm.

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