High-alloy powder metallurgy valve seat

Abstract

The utility model discloses a high alloy powder metallurgy valve seat which comprises a valve seat body, a plug is installed on the bottom face of the valve seat body, a reinforcing ring is fixedly arranged outside the plug in a sleeved mode, and two reinforcing assemblies are arranged inside the valve seat body. The bolt rotates along the rotating shaft at the bottom, then the moving block outside the bolt is driven to move downwards, the limiting block is synchronously driven to slide in the limiting groove in the moving process, the moving stability of the moving block is improved, at the moment, the connecting base outside the moving block drives the connecting rod to move synchronously, and the connecting rod is driven to move synchronously. According to the engine valve plug, the connecting rod is connected with the plug, then the ejector block connected with the connecting rod makes contact with the reinforcing ring arranged outside the plug, in the contact process, the notch in the outer portion of the ejector block is attached to the reinforcing ring, in the process, due to the fact that the reinforcing ring is pressed by the ejector block, the reinforcing ring is extruded, and the reinforcing ring is fixed towards the edge of the engine valve; therefore, the valve seat body is not loosened when being fixed.

Description

Technical Field

[0001] The utility model belongs to the technical field of valve seats, and particularly relates to a high-alloy powder metallurgy valve seat. Background Art

[0002] The function of the engine valve is to input air into the engine and discharge the exhaust gas after combustion. During the working cycle of each cylinder, the intake valve and exhaust valve are opened and closed in a certain order to ensure that fresh charge can enter the cylinder in time and exhaust gas can be discharged in time. The intake valve seat is pressed on the cylinder head and is one of the main components used to cooperate with the intake valve. However, high alloy powder can also be used to make valve seats.

[0003] For example, the publication number CN 219826945 U2 proposes a plug-in hybrid engine intake valve seat, including an intake seat ring body formed with an intake port, the intake port having a combined inner hole wall for improving the sealing matching accuracy with the intake valve, the combined inner hole wall is composed of a guide arc surface, a sealing cone hole surface, an arc transition surface and a cylindrical surface connected in sequence; the sealing cone hole surface is used to seal with the cone surface formed at the bottom of the intake valve; the guide arc surface is matched with the guide concave arc surface formed around the bottom of the intake valve; the bottom surface of the intake seat ring body and the outer peripheral surface of the intake seat ring body are processed with a combined chamfer surface for improving the assembly accuracy and sealing of the intake seat ring body and the cylinder head. The utility model has high assembly accuracy, good sealing, easy processing, long service life, and impact resistance.

[0004] However, in the implementation of relevant technologies, it was found that the above-mentioned plug-in hybrid engine intake valve seat still has the following problems: after the above-mentioned valve seat is installed, there is no reinforcement component, which causes the engine to swing when the valve seat is used for a long time, resulting in excessive gaps between the valve seats, thereby causing the valve seat and the cylinder to loosen, which can easily cause the valve seat to fall off. Therefore, improvements are now made to a high-alloy powder metallurgy valve seat. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, an embodiment of the utility model provides a high-alloy powder metallurgy valve seat, which avoids the valve seat from falling off by reinforcing the components, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model proposes a high-alloy powder metallurgy valve seat, comprising a valve seat body, a plug is installed on the bottom surface of the valve seat body, the external fixing sleeve of the plug is provided with a reinforcement ring, the interior of the valve seat body is provided with two reinforcement components, the reinforcement component comprises a bolt rotatably connected to the interior of the valve seat body, the top of the bolt is provided with a bolt cap, the external threaded sleeve of the bolt is provided with a moving block, the external fixing sleeve of the moving block is provided with a connecting seat, a connecting rod is fixedly provided on one side of the connecting seat, the bottom of the connecting rod is connected to a top block, and the top block is in contact with the reinforcement ring.

[0007] Preferably, a limiting block is fixed outside the moving block, a limiting groove is provided on a side of the limiting block close to the valve seat body, and the limiting block is in sliding contact with the limiting groove.

[0008] Preferably, a threaded hole is opened inside the moving block, and the moving block is threadably matched with the bolt.

[0009] Preferably, a notch is formed on a side of the top block close to the reinforcement ring, and the notch fits with the outer surface of the reinforcement ring.

[0010] Preferably, a mounting hole is provided inside the valve seat body, a rotating shaft is installed inside the mounting hole, and an end portion of the bolt is fixedly sleeved inside the rotating shaft.

[0011] Preferably, valve openings are provided inside the plug and the valve seat body.

[0012] The high alloy powder metallurgy valve seat proposed by the utility model can bring the following beneficial effects:

[0013] The bolt rotates along the bottom rotating shaft, thereby driving the moving block outside the bolt to move downward, and then during the movement, the limit block is synchronously driven to slide inside the limit groove, thereby increasing the stability of the movement of the moving block. At this time, the connecting seat outside the moving block drives the connecting rod to move synchronously, and then the top block connected to the connecting rod is brought into contact with the reinforcement ring opened on the outside of the plug. During the contact process, the notch outside the top block is fitted with the reinforcement ring. In this process, the reinforcement ring is subjected to the pressure of the top block, and then the reinforcement ring is squeezed, so that the reinforcement ring is fixed toward the edge of the engine cylinder block, thereby ensuring the fixation of the valve seat body. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0015] In the attached picture:

[0016] Figure 1 The utility model is a schematic diagram of the overall structure of a high-alloy powder metallurgy valve seat.

[0017] Figure 2 The utility model is a schematic diagram of the structure of a high-alloy powder metallurgy valve seat viewed from above.

[0018] Figure 3 The utility model is a schematic diagram of the cross-sectional structure of a high-alloy powder metallurgy valve seat.

[0019] Figure 4 A high alloy powder metallurgy valve seat of the utility model Figure 3 Schematic diagram of the structure at point A in the middle.

[0020] In the figure: 1. valve seat body; 2. plug; 3. moving block; 4. bolt; 5. rotating shaft; 6. bolt cap; 7. connecting seat; 8. connecting rod; 9. top block; 10. limit block; 11. limit groove; 12. valve port; 13. notch; 14. reinforcement ring. DETAILED DESCRIPTION

[0021] In order to more clearly illustrate the overall concept of the utility model, a detailed description is given below in the form of examples in conjunction with the accompanying drawings.

[0022] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0024] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In the present utility model, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one scheme", "some schemes", "examples", "specific examples" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the scheme or example are included in at least one scheme or example of the present utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same scheme or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more schemes or examples.

[0026] like Figure 1 to Figure 4 As shown, an embodiment of the utility model proposes a high-alloy powder metallurgy valve seat, including a valve seat body 1, a plug 2 is installed on the bottom surface of the valve seat body 1, the external fixing sleeve of the plug 2 is provided with a reinforcement ring 14, and two reinforcement components are provided inside the valve seat body 1, and the reinforcement component includes a bolt 4 rotatably connected to the inside of the valve seat body 1, a bolt cap 6 is provided on the top of the bolt 4, a moving block 3 is provided on the external threaded sleeve of the bolt 4, and a connecting seat 7 is provided on the external fixing sleeve of the moving block 3. A connecting rod 8 is fixedly provided on one side of the connecting seat 7, and a top block 9 is connected to the bottom of the connecting rod 8, and the top block 9 is in contact with the reinforcement ring 14.

[0027] like Figure 4 As shown, a limiting block 10 is fixed outside the moving block 3, and a limiting groove 11 is provided on one side of the limiting block 10 close to the valve seat body 1, and the limiting block 10 is in sliding contact with the limiting groove 11. The stability of the moving block 3 during movement is improved, and the top block 9 can further accurately contact the reinforcement ring 14.

[0028] like Figure 4 As shown, a threaded hole is formed inside the moving block 3, and the moving block 3 is threadedly matched with the bolt 4. The movement of the moving block 3 causes the connecting rod 8 outside the connecting seat 7 to drive the top block 9 to contact the top block 14, so that the reinforcing ring 14 effectively fixes the valve seat body 1.

[0029] like Figure 4As shown, a notch 13 is provided on one side of the top block 9 close to the reinforcement ring 14, and the notch 13 fits the outer surface of the reinforcement ring 14. The downward pressure of the top block 9 can be applied to the outside of the reinforcement ring 14 through the notch 13, so that the outer surface of the reinforcement ring 14 fits better with the exhaust hole of the engine.

[0030] like Figure 4 As shown, a mounting hole is provided inside the valve seat body 1, a rotating shaft 5 is installed inside the mounting hole, and the end of the bolt 4 is fixedly sleeved inside the rotating shaft 5. The rotating shaft 5 can be used to rotate the bolt 4 inside the valve seat body 1.

[0031] like Figure 3 As shown, the plug 2 and the valve seat body 1 are both provided with a valve port 12 to exhaust the engine.

[0032] Working principle:

[0033] When in use, the valve seat body 1 is installed at the top end of the engine exhaust, so that the plug 2 provided at the bottom of the valve seat body 1 is fixed to the valve of the engine, and then the bolt cap 6 is rotated clockwise by an external tool, so that the rotation of the bolt cap 6 synchronously drives the bolt 4 to rotate, and then the bolt 4 rotates along the bottom rotating shaft 5, and in this process, the moving block 3 outside the bolt 4 is driven to move downward, and then the limiting block 10 is synchronously driven to slide inside the limiting groove 11 during the movement, thereby increasing the stability of the movement of the moving block 3. At this time, the connecting seat 7 outside the moving block 3 drives the connecting rod 8 to move synchronously, and then the top block 9 connected to the connecting rod 8 is brought into contact with the reinforcement ring 14 opened on the outside of the 2 plugs, and in the process of contact, the notch 13 outside the top block 9 is fitted with the reinforcement ring 14, and in this process, the reinforcement ring 14 is subjected to the pressure of the top block 9, and then the reinforcement ring 14 is squeezed, so that the reinforcement ring 14 is fixed toward the edge of the engine cylinder body, thereby ensuring the fixation of the valve seat body 1 and avoiding the loosening of the valve seat body 1 to cause exhaust failure.

[0034] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0035] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A high alloy powder metallurgy valve seat, comprising a valve seat body (1), characterized in that: A plug (2) is installed on the bottom surface of the valve seat body (1), and the external fixing sleeve of the plug (2) is provided with a reinforcement ring (14). Two reinforcement components are provided inside the valve seat body (1), and the reinforcement component includes a bolt (4) rotatably connected to the inside of the valve seat body (1), a bolt cap (6) is provided on the top of the bolt (4), a moving block (3) is provided on the external threaded sleeve of the bolt (4), and a connecting seat (7) is provided on the external fixing sleeve of the moving block (3), a connecting rod (8) is fixedly provided on one side of the connecting seat (7), and a top block (9) is connected to the bottom of the connecting rod (8), and the top block (9) is in contact with the reinforcement ring (14).

2. The high alloy powder metallurgy valve seat according to claim 1, characterized in that: A limiting block (10) is fixed outside the moving block (3), a limiting groove (11) is provided on a side of the limiting block (10) close to the valve seat body (1), and the limiting block (10) is in sliding contact with the limiting groove (11).

3. The high alloy powder metallurgy valve seat according to claim 1, characterized in that: A threaded hole is provided inside the moving block (3), and the moving block (3) is threadably matched with the bolt (4).

4. The high alloy powder metallurgy valve seat according to claim 1, characterized in that: A notch (13) is provided on one side of the top block (9) close to the reinforcement ring (14), and the notch (13) is in contact with the outer surface of the reinforcement ring (14).

5. The high alloy powder metallurgy valve seat according to claim 1, characterized in that: A mounting hole is provided inside the valve seat body (1), a rotating shaft (5) is installed inside the mounting hole, and the end of the bolt (4) is fixedly sleeved inside the rotating shaft (5).

6. The high alloy powder metallurgy valve seat according to claim 1, characterized in that: The plug (2) and the valve seat body (1) are both provided with valve ports (12) inside.

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