Marine diesel engine valve structure

Abstract

The utility model discloses a marine diesel engine valve structure which comprises a valve rod. The valve head is arranged below the valve rod; the first cavity is formed in the valve rod; the sliding block is mounted in the first cavity in a sliding manner; the groove is formed in the lower wall of the sliding block; the through hole is formed in the lower wall of the valve rod and is communicated with the first cavity; one end of the connecting rod is fixedly connected with the upper end face of the valve head, and the other end of the connecting rod penetrates through the through hole and is inserted into the groove; the bolt is arranged in the sliding block, one end of the bolt is in threaded connection with the connecting rod, under the action of the limiting mechanism, the sliding block can be driven to slide in the first cavity, the connecting rod is driven to enable the upper end face of the valve head and the lower end face of the valve rod to be attached and relatively fixed, and the valve head can be conveniently replaced when being damaged after being used for a long time; and convenience is brought to people.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a valve structure for a marine diesel engine. Background Art

[0002] In the automobile engine valve system, the valve push rod is a very important component. The valve push rod enables the intake and exhaust valve rocker arms to complete the opening and closing of the ventilation process, so that the engine can operate normally. Since the engine speed is very high, this requires the valve parts in the engine to have very high strength.

[0003] At present, most of the engine valve push rods are formed by integral cold heading or welding assembly. With the advancement of engine technology and the improvement of environmental protection requirements, more and more engine parts are adopting lightweight design, and integral cold heading valve push rods are becoming less and less common. They are all replaced by welding. However, the welding process is labor-intensive, energy-intensive, and environmentally polluting. Utility Model Content

[0004] In order to solve the above problems, that is, to solve the problems raised by the above background technology, the utility model proposes a marine diesel engine valve structure, including:

[0005] Valve stem;

[0006] A valve head, arranged below the valve stem;

[0007] a first cavity formed in the valve stem;

[0008] A slider, slidably mounted in the first cavity;

[0009] a groove formed in a lower wall of the slider;

[0010] a through hole formed on a lower wall of the valve stem and communicating with the first cavity;

[0011] A connecting rod, one end of which is fixedly connected to the upper end surface of the valve head, and the other end of which passes through the through hole and is plugged into the groove;

[0012] A bolt, disposed in the slider, and having one end threadedly connected to the connecting rod;

[0013] The limiting mechanism is arranged in the valve stem and is used for limiting the position of the slider.

[0014] Preferably, the limiting mechanism includes:

[0015] A pair of second cavities are formed in the valve stem and are located below the first cavity;

[0016] A sliding rod, slidably installed in the second cavity;

[0017] A support rod, one end of which is fixedly connected to the outer surface of the sliding rod, and the other end of which passes through the upper wall of the second cavity and contacts the lower end surface of the sliding block;

[0018] A pair of placement grooves are formed on the outer surface of the valve stem and are respectively located below a pair of the second cavities;

[0019] An internal threaded sleeve, rotatably mounted on the lower end surface of the placement groove;

[0020] A screw rod, one end of which is fixedly connected to the outer surface of the sliding rod, and the other end of which passes through the lower wall of the second cavity and is threadedly connected to the internally threaded sleeve;

[0021] The annular member is fixedly mounted on the outer surface of the internal threaded sleeve.

[0022] Preferably, a compression spring is provided in the first cavity, and two ends of the compression spring are fixedly connected to the upper end surface of the first cavity and the upper end surface of the sliding block respectively.

[0023] Preferably, a positioning groove is formed on the lower end surface of the valve stem, and a positioning rod plugged into the positioning groove is fixedly mounted on the upper end surface of the valve head.

[0024] Preferably, a limiting groove is formed on the side wall surface of the second cavity, and a sliding block slidably connected to the limiting groove is fixedly mounted on the outer wall surface of the sliding rod.

[0025] The beneficial technical effect of the utility model is as follows: under the action of the bolt, one end of the connecting rod can be fixed in the groove so that it is fixed to the slider. At the same time, under the action of the limiting mechanism, the slider can be driven to slide in the first cavity, and the connecting rod can be driven to make the upper end face of the valve head fit with the lower end face of the valve stem and relatively fixed. This makes it convenient to replace the valve head when it is damaged after long-term use. Compared with the existing welding method, it can protect the environment, prevent welding fumes from polluting the environment, and bring convenience to people. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the front cross-sectional structure of the utility model is shown.

[0027] Figure 2 The utility model is shown Figure 1 Schematic diagram of the enlarged structure of part A.

[0028] Figure 3 The utility model is shown Figure 1 Schematic diagram of the enlarged structure of part B.

[0029] Figure numerals 1, valve stem, 2, valve head, 3, first cavity, 4, slider, 5, groove, 6, through hole, 7, connecting rod, 8, bolt, 9, second cavity, 10, sliding rod, 11, supporting rod, 12, placement groove, 13, internal threaded sleeve, 14, screw, 15, ring part, 16, compression spring, 17, positioning groove, 18, positioning rod, 19, limit groove, 20, sliding block. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0031] The utility model provides a marine diesel engine valve structure, comprising:

[0032] Valve stem 1;

[0033] A valve head 2 is arranged below the valve stem 1;

[0034] A first cavity 3 is formed in the valve stem 1;

[0035] A slider 4 is slidably mounted in the first cavity 3;

[0036] A groove 5 is formed in the lower wall of the slider 4;

[0037] A through hole 6 is formed on the lower wall of the valve stem 1 and communicated with the first cavity 3;

[0038] A connecting rod 7, one end of which is fixedly connected to the upper end surface of the valve head 2, and the other end of which passes through the through hole 6 and is plugged into the groove 5;

[0039] A bolt 8 is disposed in the slider 4, and one end of the bolt is threadedly connected to the connecting rod 7;

[0040] The outer wall surface of the valve stem 1 is formed with a through opening communicating with the first cavity 3, which can facilitate the staff to use external tools to rotate the bolt 8 so as to fix one end of the connecting rod 7 with the groove 5;

[0041] The limiting mechanism is arranged in the valve stem 1 and is used to limit the slider 4 .

[0042] Specifically, the limiting mechanism includes:

[0043] A pair of second cavities 9 are formed in the valve stem 1 and are located below the first cavity 3;

[0044] A sliding rod 10 is slidably mounted in the second cavity 9;

[0045] A support rod 11, one end of which is fixedly connected to the outer surface of the sliding rod 10, and the other end of which passes through the upper wall of the second cavity 9 and contacts the lower end surface of the sliding block 4;

[0046] The sliding rod 10 slides upward in the second cavity 9, which can drive the support rod 11 to move at the same time. The top end of the support rod 11 contacts the lower end surface of the slider 4 and drives it to slide in the first cavity 3, so that the lower end surface of the valve stem 1 and the upper end surface of the valve head 2 can contact each other and be relatively fixed.

[0047] A pair of placement grooves 12 are formed on the outer surface of the valve stem 1 and are respectively located below the pair of second cavities 9;

[0048] An internal thread sleeve 13 is rotatably mounted on the lower end surface of the placement groove 12;

[0049] A screw rod 14, one end of which is fixedly connected to the outer surface of the sliding rod 10, and the other end of which passes through the lower wall of the second cavity 9 and is threadedly connected to the internal threaded sleeve 13;

[0050] The ring member 15 is fixedly mounted on the outer surface of the internal thread sleeve 13;

[0051] The surface of the annular member 15 is formed with anti-skid grooves. When the staff rotates the annular member 15, the internal threaded sleeve 13 can be driven to rotate at the same time, so that the screw 14 can be driven to move. The movement of the screw 14 can drive the sliding rod 10 to slide in the second cavity 9.

[0052] Specifically, a compression spring 16 is disposed in the first cavity 3, and two ends of the compression spring 16 are fixedly connected to the upper end surface of the first cavity 3 and the upper end surface of the slider 4 respectively;

[0053] The compression spring 16 can exert a downward force on the slider 4 so that when the support rod 11 is not supporting it, the bolt 8 on the slider 4 can be at the same level as the through hole, making it convenient for the staff to turn the bolt 8.

[0054] Specifically, a positioning groove 17 is formed on the lower end surface of the valve stem 1, and a positioning rod 18 plugged into the positioning groove 17 is fixedly installed on the upper end surface of the valve head 2;

[0055] The positioning groove 17 and the positioning rod 18 can play a positioning role, and can facilitate the bolt 8 to fix one end of the connecting rod 7 in the groove 5.

[0056] Specifically, a limiting groove 19 is formed on the side wall of the second cavity 9, and a sliding block 20 slidably connected to the limiting groove 19 is fixedly mounted on the outer wall of the sliding rod 10;

[0057] Under the action of the limiting groove 19 and the limiting block 20 , the sliding rod 10 can be made to slide more stably in the second cavity 9 .

[0058] Working principle: when it is necessary to connect and fix the valve stem 1 and the valve head 2, the staff first inserts the connecting rod 7 into the through hole 6, and at the same time inserts the positioning rod 18 into the positioning groove 17. At this time, one end of the connecting rod 7 is plugged into the groove 5. At this time, the staff uses an external tool to insert it into the through hole and rotates the bolt 8 so that one end of it is threadedly connected to the connecting rod 7, so that one end of the connecting rod 7 is fixed in the groove 5. At this time, the staff rotates the annular member 15, and the annular member 15 can drive the internal threaded sleeve 13 to rotate at the same time, so that it drives the screw 14 to move. The movement of the screw 14 can drive the sliding rod 10 to slide in the second cavity 9. At this time, the sliding rod 10 drives the support rod 11 to move at the same time, so that the top end of the support rod 11 contacts the lower end surface of the slider 4, and drives the slider 4 to move upward. At this time, the slider 4 drives the connecting rod 7 to slide in the through hole 6, so that the upper end surface of the valve head 2 contacts the lower end surface of the valve stem 1, and the fixation is completed, which brings convenience to people.

[0059] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0060] In the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0061] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0062] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0063] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A marine diesel engine valve structure, characterized in that: include; Valve stem (1); A valve head (2) is arranged below the valve stem (1); A first cavity (3) is formed in the valve stem (1); A slider (4) slidably mounted in the first cavity (3); A groove (5) is formed in the lower wall of the slider (4); A through hole (6) is formed on the lower wall of the valve stem (1) and is in communication with the first cavity (3); A connecting rod (7), one end of which is fixedly connected to the upper end surface of the valve head (2), and the other end of which passes through the through hole (6) and is plugged into the groove (5); A bolt (8) is disposed in the slider (4) and one end of which is threadedly connected to the connecting rod (7); A limiting mechanism is arranged in the valve stem (1) and is used to limit the position of the slider (4).

2. A marine diesel engine valve structure according to claim 1, characterized in that: The limiting mechanism comprises: A pair of second cavities (9), both formed in the valve stem (1) and located below the first cavity (3); A sliding rod (10) slidably mounted in the second cavity (9); A support rod (11), one end of which is fixedly connected to the outer surface of the sliding rod (10), and the other end of which passes through the upper wall of the second cavity (9) and contacts the lower end surface of the sliding block (4); A pair of placement grooves (12) are formed on the outer surface of the valve stem (1) and are respectively located below a pair of the second cavities (9); An internal thread sleeve (13) is rotatably mounted on the lower end surface of the placement groove (12); A screw rod (14), one end of which is fixedly connected to the outer surface of the sliding rod (10), and the other end of which passes through the lower wall of the second cavity (9) and is threadedly connected to the internal threaded sleeve (13); The annular member (15) is fixedly mounted on the outer surface of the internally threaded sleeve (13).

3. A marine diesel engine valve structure according to claim 1, characterized in that: A compression spring (16) is arranged in the first cavity (3), and two ends of the compression spring (16) are respectively fixedly connected to the upper end surface of the first cavity (3) and the upper end surface of the slider (4).

4. A marine diesel engine valve structure according to claim 1, characterized in that: A positioning groove (17) is formed on the lower end surface of the valve stem (1), and a positioning rod (18) plugged into the positioning groove (17) is fixedly mounted on the upper end surface of the valve head (2).

5. A marine diesel engine valve structure according to claim 2, characterized in that: A limiting groove (19) is formed on the side wall surface of the second cavity (9), and a sliding block (20) slidably connected to the limiting groove (19) is fixedly mounted on the outer side wall surface of the sliding rod (10).

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