Height mistake proofing device for valve seat ring
By using the design of angle and limit structures in valve seat detection, the problem of inaccurate valve seat height detection in the prior art is solved, rapid and accurate screening of valve seats is achieved, and the quality and stability of the engine are improved. sex.
Patent Information
- Application Number
- CN202420883583.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-25
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-04-25
AI Technical Summary
In the prior art, there is a risk of unqualified products flowing out of valve seat height detection, which affects the engine quality, and the detection method is not accurate enough.
Design a height error-proof device for valve seats, using an angled conveying tabletop and an anti-error plate, standard block and limit steps on it, through the design of angles and contact points, the processing size exceeds or Valve races smaller than the design height ensure that they are classified as qualified or non-qualified.
It realizes rapid and accurate screening of valve seats, improves product quality, and ensures the accuracy and operational safety of the engine gas distribution mechanism.
Smart Images
Figure CN222325832U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of engines, in particular to a height error-proofing device for a valve seat ring. Background Art
[0002] The engine includes a crankshaft-connecting rod mechanism, a valve train, a fuel supply system, an ignition system, a cooling system, a lubrication system and a pneumatic system. The valve train includes a valve group and a valve drive group. The valve group is the core part of the valve train. Its manufacturing accuracy is directly related to the sealing of the valve train, which in turn affects the engine's performance. The valve group includes a valve seat ring, so the accuracy of the valve seat ring is also crucial. In the existing production process, the height of the valve seat ring is controlled by a double-end grinder. The operator detects its height through intermittent sampling and then corrects its size. This sampling method has the risk of unqualified valve seat rings flowing out, which will seriously affect the quality of the engine. Utility Model Content
[0003] The utility model provides a valve seat height error prevention device to solve the valve seat height detection problem. The specific technical solution is as follows:
[0004] A height error prevention device for a valve seat ring comprises: a conveying table, which forms an angle with a bottom surface; an error prevention plate arranged on the conveying table, which protrudes at one end of the error prevention plate close to the angle of the conveying table to form a limited step; a standard block and a valve seat ring arranged between the conveying table and the error prevention plate.
[0005] Preferably, the side of the anti-error plate close to the conveying table is parallel to the conveying table, the protruding height of the limiting step is H3, 0.09≤H3≤0.11mm, the upper and lower surfaces of the standard block are in close contact with the anti-error plate and the conveying table respectively, the height of the upper and lower surfaces of the standard block is H2, H2 is the standard value, H2 is 0.05mm more than the design height H1 of the valve seat ring, and the valve seat ring processing height error is ±0.05mm.
[0006] Preferably, the valve seat ring is made of an iron-based powder metallurgy part.
[0007] It can be seen from the above technical solution that the utility model has the following beneficial effects:
[0008] The utility model places the valve seat ring on a conveying table with an angle with the bottom surface, so that the valve seat ring always has a tendency to slide down, and at the same time sets the height between the limit plate and the conveying table to H2, which can screen out the valve seat ring whose processing size exceeds the design height H1+0.05mm, and then sets the protruding height of the limit step to H3, which can screen out the valve seat ring whose processing size is less than the design height H1-0.05mm, so that the valve seat ring can be quickly, accurately and comprehensively classified into qualified products and unqualified products, thereby improving the outflow quality of the valve seat ring. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 This is a cross-sectional view of an embodiment of the utility model;
[0010] Figure 2 for Figure 1 A partial enlarged view of point B.
[0011] In the figure: 1. conveying table, 2. anti-error plate, 3. bolts, 4. standard block, 5. valve seat ring, 6. limit step. DETAILED DESCRIPTION
[0012] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0013] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0014] like Figure 1As shown, the embodiment of the utility model includes a conveying table 1, and the angle A between the conveying table 1 and the bottom surface is 22.5°. A valve seat ring is placed on the conveying table 1, and the valve seat ring is made of an iron-based powder metallurgy part. The inventor of the present application has found through experiments that when the angle A is 22.5°, the valve seat ring can always be close to the conveying table 1 when sliding down the conveying table; when the angle A is less than or greater than 22.5°, the valve seat ring will be affected by the friction force of the conveying table 1, and it will jump during the sliding process. Once the valve seat ring jumps, non-conforming products that do not meet the height requirements will be misjudged as qualified products by the utility model due to the jumping, causing production accidents.
[0015] It should be noted that the angle A of 22.5° is complementary to the iron-based powder metallurgy parts. When the valve seat material changes, the angle A may also change.
[0016] Secondly, a bolt 3 is connected obliquely above the conveying table 1 through a thread. The bolt 3 passes through a standard part 4 and then passes through a limit plate 2. A valve seat ring 5 is placed between the limit plate 2 and the conveying table 1.
[0017] Among them, the upper and lower surfaces of the valve seat ring 5 are parallel after flowing out of the double-end surface grinder, and its design height is H1. The allowable processing error of H1 is ±0.05mm. The front valve seat ring 5 slides on the conveying table 1 under the push of the rear valve seat ring 5.
[0018] Among them, the bottom surface of the right end of the limit plate 2 is in direct contact with the standard block 4. The height dimension of the standard block 4 is H2, which is the standard value. H2 of different specifications needs to meet a condition: H2 = H1 + 0.05mm, that is, the selected height H2 of the standard block 4 needs to be 0.05mm larger than the design height H1 of the valve seat ring 5. When the actual height dimension of the valve seat ring 5 is H1-0.05mm, the distance between the top surface of the valve seat ring 5 and the bottom surface of the limit plate 2 is 0.1mm. When the actual height dimension of the valve seat ring 5 is H1 + 0.05mm, the top surface of the valve seat ring 5 just contacts the bottom surface of the limit plate 2, that is, all qualified valve seat rings 5 can pass through the gap between the limit plate 2 and the conveying table 1.
[0019] Among them, a limiting step 6 protrudes from the bottom surface of the left end of the limiting plate 2 toward the conveying table 1, and the distance between the bottom surface of the limiting step 6 and the bottom surface of the limiting plate 2 is H3. In this embodiment, the processing error of the limiting plate 2 and the limiting step 6 is not considered, and H3=0.1mm.
[0020] Combined with the description of H1, H2 and H3 above, the method for the device to judge whether the height dimension of the valve seat ring 5 is qualified is as follows:
[0021] When the machining size of a valve seat ring 5 is less than H1-0.05mm, the distance between its top surface and the bottom surface of the limiting plate 2 is greater than 0.1mm. When it passes through the gap between the limiting plate 2 and the conveying table 1, the limiting step 6 cannot prevent the valve seat ring 5 from sliding downward along the conveying table 1 into the defective product collection box (not shown in the figure);
[0022] When the processing size of a valve seat ring 5 is larger than H1+0.05, its top surface exceeds the bottom surface of the limiting plate 2, so that the valve seat ring 5 cannot pass through the gap between the limiting plate 2 and the conveying table 1, and will also be collected and placed in the defective product collection box.
[0023] Because the device is placed on the valve seat 5 production line, each valve seat 5 processed by the double-end grinder will be tested by the device, so that the valve seat 5 flowing out can meet the accuracy requirements of the engine valve mechanism, thereby improving the safety and stability of engine operation.
[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
[0025] The technology, shape and structure parts not described in detail in the present invention are all known technologies.
Claims
1. A height error-proofing device for a valve seat ring, characterized in that: include: A conveying table (1), wherein the conveying table (1) forms an angle with the bottom surface; An anti-error plate (2) is arranged on the conveying table (1), and the anti-error plate (2) protrudes at one end close to the angle of the conveying table (1) to form a limited step (6); A standard block (4) and a valve seat ring (5) are arranged between the conveying table (1) and the error prevention plate (2).
2. The height error-proofing device according to claim 1, characterized in that: The angle formed by the conveying table (1) and the bottom surface is A, 20°≤A≤30°.
3. The height error-proofing device according to claim 1, characterized in that: A side of the error prevention plate (2) close to the conveying table (1) is parallel to the conveying table (1).
4. The height error-proofing device according to claim 3 is characterized in that: The protruding height of the limiting step (6) is H3, 0.09≤H3≤0.11mm.
5. The height error-proofing device according to claim 4, characterized in that: The upper and lower surfaces of the standard block (4) are in close contact with the anti-error plate (2) and the conveying table (1) respectively. The height of the upper and lower surfaces of the standard block (4) is H2, which is a standard value. H2 is 0.05 mm higher than the design height H1 of the valve seat ring (5).
6. The height error-proofing device according to claim 5, characterized in that: The machining height error of the valve seat ring (5) is ±0.05 mm.
7. The height error-proofing device according to claim 1, characterized in that: The valve seat ring (5) is made of an iron-based powder metallurgy part.