Oil outlet valve tight seat protection structure

Abstract

The utility model relates to an oil outlet valve tight seat protection structure which comprises an oil injection pump, a pump head and oil outlet valve tight seats, the pump head is fixed at the outer end of the oil injection pump, at least three oil outlet valve tight seats are fixed at the outer end of the pump head, all the oil outlet valve tight seats are arranged in a concyclic mode, and external threads are arranged at the outer ends of the oil outlet valve tight seats. The cable further comprises a sheath, the sheath comprises an inner sleeve, a connecting ring and an outer sleeve, the outer circle of the outer end of the inner sleeve is connected with the inner circle of the outer end of the outer sleeve through the connecting ring, an annular inner sleeve protrusion is arranged on the outer circle of the inner sleeve, and an annular outer sleeve protrusion is arranged on the inner circle of the outer sleeve. The outer ends of all the oil outlet valve fastening seats are inserted between the inner sleeve and the outer sleeve of the same protective sleeve, and the outer threads of the oil outlet valve fastening seats are embedded between the adjacent inner sleeve protrusions and the adjacent outer sleeve protrusions. According to the utility model, the sheath is easier to disassemble and assemble, so that working hours can be saved; and the inner sleeve bulge and the outer sleeve bulge on the sheath are matched with the external threads of the oil outlet valve fastening seat, so that the sheath is easy to fix and not easy to fall off.

Description

Technical Field

[0001] The utility model belongs to the technical field of fuel injection pump structures and specifically discloses a fuel outlet valve seat protection structure. Background Art

[0002] At present, a pump head 2 is fixed at the outer end of the fuel injection pump 1, at least two oil outlet valve seats 3 are fixed at the outer end of the pump head 2, and the outer ends of the oil outlet valve seats 3 are provided with external threads; a protective cap 4 is installed at the outer end of each oil outlet valve seat 3, such as Figure 1 and Figure 2 As shown, the protective cap 4 is made of rubber and is elastic, and the inner diameter of the protective cap 4 is smaller than the outer diameter of the oil outlet valve seat 3. During installation, the protective cap 4 is tightly fixed on the oil outlet valve seat 3 by elastic deformation, and the protective cap 4 plays a role in preventing dust and collision on the oil outlet valve seat 3. Each fuel injection pump 1 has multiple oil outlet valve seats 3, and the protective cap 4 consumes a long time in the process of assembling and disassembling. Summary of the invention

[0003] The utility model aims to overcome the deficiencies in the prior art and provide an oil outlet valve seat protection structure which can prevent dust and collision and is easy to assemble and disassemble.

[0004] According to the technical solution provided by the utility model, the oil outlet valve seat protection structure includes a fuel injection pump, a pump head and an oil outlet valve seat, the pump head is fixed at the outer end of the fuel injection pump, at least two oil outlet valve seats are fixed at the outer end of the pump head, and all the oil outlet valve seats are arranged in a cocircle, and the outer ends of the oil outlet valve seats are provided with external threads; it also includes a sleeve, the sleeve includes an inner sleeve, a connecting ring and an outer sleeve, the outer end outer circle of the inner sleeve is connected to the inner end inner circle of the outer sleeve through a connecting ring, an annular inner sleeve protrusion is provided on the outer circle of the inner sleeve, and an annular outer sleeve protrusion is provided on the inner circle of the outer sleeve;

[0005] The outer ends of all the oil outlet valve seats are inserted between the inner sleeve and the outer sleeve of the same sleeve, and the outer threads of the oil outlet valve seats are embedded between adjacent inner sleeve protrusions and adjacent outer sleeve protrusions.

[0006] Preferably, 3-6 oil outlet valve seats are fixed to the outer end of the pump head.

[0007] Preferably, four oil outlet valve seats are fixed to the outer end of the pump head, and the four oil outlet valve seats are located at the vertices of the same rectangle or the same square.

[0008] The protective sleeve of the utility model is easier to disassemble and assemble, which can save work hours; the inner sleeve protrusion and the outer sleeve protrusion on the protective sleeve match the external thread of the oil outlet valve seat, which is easy to fix and not easy to fall off. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1This is the assembly drawing of the fuel injection pump, pump head and fuel delivery valve seat when the protective cap is not installed.

[0010] Figure 2 This is the assembly drawing of the fuel injection pump, pump head and fuel delivery valve seat with the protective cap installed.

[0011] Figure 3 It is an assembly drawing of the utility model.

[0012] Figure 4 It is a three-dimensional diagram of the sheath in the utility model.

[0013] Figure 5 It is a front view of the sheath in the utility model.

[0014] Figure 6 It is a rear view of the sheath in the utility model.

[0015] Figure 7 yes Figure 6 AA section view.

[0016] Figure 8 yes Figure 7 Magnified view of part B. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0018] An oil outlet valve seat protection structure, such as Figure 3-8 As shown, it includes a fuel injection pump 1, a pump head 2 and a fuel outlet valve seat 3, the pump head 2 is fixed at the outer end of the fuel injection pump 1, at least two fuel outlet valve seats 3 are fixed at the outer end of the pump head 2, and all the fuel outlet valve seats 3 are arranged in a cocircle, and the outer ends of the fuel outlet valve seats 3 are provided with external threads; it also includes a sleeve 5, the sleeve 5 includes an inner sleeve 5.1, a connecting ring 5.2 and an outer sleeve 5.3, the outer end outer circle of the inner sleeve 5.1 is connected to the outer end inner circle of the outer sleeve 5.3 through the connecting ring 5.2, an annular inner sleeve protrusion 5.11 is provided on the outer circle of the inner sleeve 5.1, and an annular outer sleeve protrusion 5.31 is provided on the inner circle of the outer sleeve 5.3;

[0019] The outer ends of all the oil outlet valve seats 3 are inserted between the inner sleeve 5.1 and the outer sleeve 5.3 of the same sheath 5, and the outer threads of the oil outlet valve seats 3 are embedded between adjacent inner sleeve protrusions 5.11 and adjacent outer sleeve protrusions 5.31.

[0020] Preferably, 3-6 oil outlet valve seats 3 are fixed to the outer end of the pump head 2 .

[0021] Optimally, four oil outlet valve seats 3 are fixed to the outer end of the pump head 2, and the four oil outlet valve seats 3 are located at the vertices of the same rectangle or the same square.

[0022] During installation, the rear end of the sleeve 5 is inserted into the front end of the oil outlet valve seat 3, and the front end of the oil outlet valve seat 3 is inserted between the inner sleeve 5.1 and the outer sleeve 5.3 until the front end surface of the oil outlet valve seat 3 is close to the rear end surface of the connecting ring 5.2. The assembly is completed, and the external thread of the oil outlet valve seat 3 is embedded between the adjacent inner sleeve protrusions 5.11 and the adjacent outer sleeve protrusions 5.31, so that the sleeve 5 is easy to fix on the front end of the oil outlet valve seat 3 and is not easy to fall off, thereby protecting the external thread of the oil outlet valve seat 3, preventing dust from entering the interior of the fuel injection pump 1, and preventing the oil outlet valve seat 3 from bumping.

[0023] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to examples, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A fuel outlet valve seat protection structure, comprising a fuel injection pump (1), a pump head (2) and a fuel outlet valve seat (3), wherein the pump head (2) is fixed to the outer end of the fuel injection pump (1), at least two fuel outlet valve seats (3) are fixed to the outer end of the pump head (2), and all the fuel outlet valve seats (3) are arranged in a cocircle, and the outer end of the fuel outlet valve seat (3) is provided with an external thread; wherein: The invention also comprises a protective sleeve (5), wherein the protective sleeve (5) comprises an inner sleeve (5.1), a connecting ring (5.2) and an outer sleeve (5.3), wherein the outer end outer circle of the inner sleeve (5.1) and the inner end inner circle of the outer sleeve (5.3) are connected via the connecting ring (5.2), an annular inner sleeve protrusion (5.11) is provided on the outer circle of the inner sleeve (5.1), and an annular outer sleeve protrusion (5.31) is provided on the inner circle of the outer sleeve (5.3); The outer ends of all the oil outlet valve seats (3) are inserted between the inner sleeve (5.1) and the outer sleeve (5.3) of the same sleeve (5), and the outer threads of the oil outlet valve seats (3) are embedded between adjacent inner sleeve protrusions (5.11) and adjacent outer sleeve protrusions (5.31).

2. The oil outlet valve seat protection structure according to claim 1, characterized in that: 3 to 6 oil outlet valve seats (3) are fixed on the outer end of the pump head (2).

3. The oil outlet valve seat protection structure according to claim 2, characterized in that: Four oil outlet valve seats (3) are fixed to the outer end of the pump head (2), and the four oil outlet valve seats (3) are located at the vertices of the same rectangle or the same square.

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