Self-centering engine cylinder head race grinding tool

Abstract

The utility model aims to provide a self-centering grinding tool for an engine cylinder head seat ring. The self-centering grinding tool is characterized by comprising a rod part, a grinding disc part and a connecting bit. And the outer diameter of the rod part is smaller than the inner diameter of a valve guide pipe for installing a valve on the cylinder cover. The grinding disc part is disc-shaped, one end of the grinding disc part is provided with the neck part and the rod part, and the other end of the grinding disc part is connected with the connecting bit. The neck part is a transition area connecting the rod part and the grinding disc part. The shape of the grinding disc part is the same as that of a disc part of a valve assembled on a cylinder cover. And the side surface of the grinding disc part and / or the neck part is a grinding surface. An electric drill is only needed to drive the valve assembly grinding tool to rotate, so that the grinding surface grinds the surface of the valve seat ring. After grinding is completed, due to the fact that the grinding disc part is the same as the actual disc part of the valve in size and structure, the valve can be prevented from being closed untight after the valve is assembled.

Description

TECHNICAL FIELD

[0001] The utility model relates to a valve assembly tool. BACKGROUND

[0002] In the use of the engine, due to high temperature, carbon deposition, wear, deformation and other complex reasons, it may lead to valve sealing, which will directly affect the performance of the engine. In the prior art, if the valve is not tight, it is not enough to replace the new valve, and various complex repairs and adjustments are also needed. In the prior art, the tool for trimming and adjusting the valve is relatively complex, and it is difficult to use. After trimming, the engine may also need some time to adapt to the new parts to ensure the coordinated operation of the valve and other parts of the engine. SUMMARY

[0003] The utility model discloses a kind of self-centering engine cylinder head seat circle grinding tools, it is characterized by: including stem, grinding disc part and connecting bit.

[0004] The stem is cylindrical, and its outer diameter is smaller than the inner diameter of the valve guide tube of the cylinder head.

[0005] The grinding disc part is disc-shaped, one end of which is the neck and stem, and the other end is connected with the connecting bit. The neck is a transition area connecting the stem and the grinding disc part. The outer shape of the grinding disc part is the same as the disc part of the valve assembled on the cylinder head. The side surface of the grinding disc part is a grinding surface, which is used for grinding and has a rough surface. When the stem is inserted into the valve guide tube, the grinding surface contacts the valve seat ring assembled on the cylinder head.

[0006] The connecting bit is a columnar body. When grinding the valve seat ring, the connecting bit is clamped by an electric drill, and the grinding disc part is rotated by the electric drill to grind the valve seat ring.

[0007] Further, the end of the stem away from the grinding disc part is an end. The end matches the outer shape of the stem and the stem end of the valve assembled on the cylinder head.

[0008] Further, the connecting bit is a hexagonal body.

[0009] Further, the grinding surface is a diamond abrasive layer.

[0010] The technical effect of the utility model is self-evident. When using, after cleaning the carbon deposition of the valve seat ring and the internal structure of the cylinder head, the valve assembly grinding tool is clamped by an electric drill, the stem is inserted into the valve guide tube of the cylinder head, and the valve assembly grinding tool is rotated by the electric drill, so that the grinding surface grinds the surface of the valve seat ring. After grinding, since the grinding disc part has the same size and structure as the disc part of the actual valve, the valve can be assembled to avoid loose closing.BRIEF DESCRIPTION OF DRAWINGS BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is a structural schematic diagram of the utility model;

[0012] Figure 2 is a structural schematic diagram of the utility model matched with the cylinder cover;

[0013] Figure 3 is a structural schematic diagram of the existing valve.

[0014] In the figure: rod part I (1), neck part (2), grinding disc part (3), end part (4), connecting bit (5), cylinder cover (6), valve seat ring (7), air passage (8), valve guide (9), disc part (10), neck part (11), rod part II (12), locking clamp part (13), rod end part (14). DETAILED DESCRIPTION

[0015] The utility model will be further explained in connection with the drawings and examples, but should not be understood as the above-mentioned subject range of the utility model is limited to the following examples. According to the ordinary technical knowledge and conventional means in the art, make various substitutions and changes without departing from the above-mentioned technical thought of the utility model, all should be included in the protection scope of the utility model.

[0016] Example 1:

[0017] Referring to 1, a self-centering engine cylinder head seat ring grinding tool is characterized by comprising rod part 1, grinding disc part 3 and connecting bit 5.

[0018] As shown in Figure 2 , the valve seat in the cylinder cover 6 needing to be ground is provided with a valve seat ring 7 in contact with the valve, and the inside of the valve seat is provided with structures such as air passage 8 and valve guide 9. The rod part 1 is cylindrical, and its outer diameter is smaller than the inner diameter of the valve guide 9 of the cylinder cover 6, so that the valve assembly grinding tool can be inserted into the valve guide 9 to realize positioning.

[0019] The grinding disc part 3 is disc-shaped, one end of which is the neck part 2 and the rod part 1, and the other end is connected with the connecting head 5; the neck part 2 is the transition area connecting the rod part 1 and the grinding disc part 3; the outer shape of the grinding disc part 3 is the same as that of the disc part 10 of the valve assembled on the cylinder cover 6; the side surface of the grinding disc part 3 is the grinding surface; in the embodiment, the grinding surface is a diamond abrasive layer. It is worth mentioning that the side surface of the grinding disc part is plated with diamond abrasive to form the grinding surface, and the process is the same as the manufacturing process of the existing diamond grinding wheel. That is, the body part of the grinding disc part is similar to the base body of the diamond grinding wheel, a transition layer and a diamond abrasive layer are formed on the base body, and the diamond abrasive layer is composed of abrasive, binder and filler. The surface of the diamond abrasive layer is the grinding surface. The transition layer, also known as the non-diamond layer, is composed of binder, metal powder and filler, and is the part that firmly connects the diamond layer to the base body.

[0020] When the rod part 1 is inserted into the valve guide 9, the grinding surface 3 is in contact with the valve seat ring 7 assembled on the cylinder cover 6;

[0021] As Figure 2 , the connecting head 5 is a columnar body, such as a hexagonal column, when grinding the valve seat ring 7, the connecting head 5 is clamped by an electric drill, and the grinding disc part 3 is driven to rotate by the electric drill to grind the valve seat ring 7.

[0022] Embodiment 2:

[0023] The structure of this embodiment is the same as that of embodiment 1, and further, as shown in Figure 3 , the existing valve includes a disc part 10, a neck part 11, a rod part 12, a locking part 13, and a rod end part 14. The valve assembled with the grinding tool of the present application matches the outer shape of each part of the existing valve, such as the end part 4 away from the grinding disc part 3 of the rod part 1; the end part 4 matches the outer shape of the rod part 12 and the rod end part 15 of the valve assembled on the cylinder cover 6.

Claims

1. A self-centering engine cylinder head seat ring lapping tool characterized by: The rod part I (1), the grinding disc part (3) and the connecting bit (5) are included. The rod part I (1) is cylindrical, and its outer diameter is less than the inner diameter of the valve guide pipe (9) of the cylinder cover (6) installed with the valve. The grinding disc part (3) is disc-shaped, one end of which is the neck part (2) and the rod part I (1), and the disc part and the rod part need to have concentricity requirement, and the other end is connected with the connecting bit (5); the neck part (2) is the transition area connecting the rod part I (1) and the grinding disc part (3); the outer shape of the grinding disc part (3) is the same as the disc part (10) of the valve assembled on the cylinder cover (6); the side surface of the grinding disc part (3) is the grinding surface; when the rod part I (1) is inserted into the valve guide pipe (9), the grinding surface of the grinding disc part (3) is in contact with the valve seat ring (7) installed on the cylinder cover (6). When the valve seat ring (7) is ground, the connecting bit (5) is clamped by the electric drill, and the grinding disc part (3) is driven to rotate by the electric drill to grind the valve seat ring (7).

2. A self-centering engine cylinder head seat circle grinding tool according to claim 1, characterized in that: The rod part I (1) is connected with the end part (4) away from the grinding disc part (3); the end part (4) matches the outer shape of the rod part II (12) and the rod end part (15) of the valve assembled on the cylinder cover (6).

3. A self-centering engine cylinder head seat circle grinding tool according to claim 1, characterized in that: The connecting bit (5) is hexahedron.

4. A self-centering engine cylinder head seat circle grinding tool according to claim 1, characterized in that: The grinding surface is a diamond abrasive layer.

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