CN214741531U - Valve seat ring structure convenient to dismantle - Google Patents
Valve seat ring structure convenient to dismantle Download PDFInfo
- Publication number
- CN214741531U CN214741531U CN202120595952.8U CN202120595952U CN214741531U CN 214741531 U CN214741531 U CN 214741531U CN 202120595952 U CN202120595952 U CN 202120595952U CN 214741531 U CN214741531 U CN 214741531U
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- Prior art keywords
- valve seat
- seat ring
- breach
- notch
- seat circle
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- Withdrawn - After Issue
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- 125000004122 cyclic group Chemical group 0.000 claims description 3
- 238000003754 machining Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000003801 milling Methods 0.000 description 16
- 230000006978 adaptation Effects 0.000 description 3
- 230000003313 weakening effect Effects 0.000 description 3
- 241001391944 Commicarpus scandens Species 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 210000000080 chela (arthropods) Anatomy 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 125000003003 spiro group Chemical group 0.000 description 1
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- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The utility model relates to an engine maintenance technical field, concretely relates to valve seat circle structure convenient to dismantle, set up the valve seat circle on the cylinder head body including interference fit, the inner wall of valve seat circle is provided with first breach to the inboard, is provided with the second breach to the inboard on the valve seat circle surface of keeping away from the cylinder head body. The prying bar is adopted to take the notch formed on the valve seat ring through a machining method as a stress point for dismounting, and the prying bar is simple in structure, good in universality and high in dismounting efficiency.
Description
Technical Field
The utility model relates to an engine maintenance technical field, concretely relates to valve seat circle structure convenient to dismantle.
Background
The seat ring installed in the engine cylinder cover is reworked after a new seat ring needs to be replaced in order to avoid scrapping the whole cylinder cover and reduce loss under the conditions that the machining size cannot meet the drawing requirement, design change, use abrasion and the like. Because the seat circle is interference fit with the seat circle mounting hole, and because the restriction of seat circle and cylinder head structure does not have fine impetus on the seat circle, lead to the seat circle just very difficult dismantling after the assembly is accomplished. At the in-process of changing the seat circle, use instruments such as traditional hammers, pincers, chisel to directly beat the dismantlement to the seat circle, cause the seat circle mounting hole damage easily to influence the installation of new seat circle, lead to the cylinder head to scrap even.
There are also some tools for removing the seat ring, but the devices are basically customized products, and have poor versatility and low efficiency. These devices basically use an internal bore of the seat ring and pull out the valve seat ring by means of a pulling mechanism.
The valve seat insert extracting tool as disclosed in chinese patent CN103395037A includes: the longitudinal section of the support is in an inverted U shape, the bottom surface of the opening wall is used for supporting the top surface of the cylinder cover, and the center of the top surface of the support is provided with a lifting hole; a mandrel positioning assembly, comprising: the core shaft positioning sleeve is of a cylindrical structure, an axial horn-shaped core fixing pull rod abdicating hole is formed in the center of the core shaft positioning sleeve, and a tongue expanding slide way which extends outwards to the side face of the circumference from the core fixing pull rod abdicating hole along the radial direction of the core shaft positioning sleeve is further formed; the expansion tongue is designed into a double-side single-side wedge shape and can be freely and telescopically arranged in the expansion tongue slideway; decide core pull rod, it includes: with the valve guide pole hole adaptation male bottom section and with the toper section of deciding the core pull rod hole adaptation of stepping down to and with the core pull rod hole of stepping down, the top section of drawing the lift hole adaptation male of support, the upper portion spiro union of top section has the dismantlement nut.
Also, as disclosed in chinese patent CN102085650A, a special tool for detaching a valve seat ring of a cylinder cover of a diesel engine is structurally characterized in that a positioning nut is mounted on a positioning screw, and a lifting nut and a bracket are sleeved on a screw lifting screw. The lower part of the lifting nut is provided with a conical surface expansion positioning disc, the lower end surface of the positioning disc is connected with a positioning shaft through threads, three valve seat ring grapples are arranged at the lower end of the lifting nut at intervals of 120 degrees, each valve seat ring grapple is connected with the sleeve wall at the lower end of the lifting nut through a shaft, and the grapple can be opened or closed. The guide, the conical surface jacking and 3 valve seat ring grapples which are connected with the screw sleeve into a whole are adopted to form a lifting mechanism, so that the valve seat ring is lifted upwards and pulled out.
However, the prior art adopts a special drawing mechanism, and the device is basically a customized product, so that the universality is poor and the efficiency is low.
SUMMERY OF THE UTILITY MODEL
The utility model provides a valve seat circle structure convenient to dismantle adopts the pinch bar to dismantle as the stress point in order to form at the breach of valve seat circle through the machining method, simple structure, and the commonality is good, dismantles efficiently.
The technical scheme of the utility model as follows:
a valve seat ring structure convenient to disassemble comprises a valve seat ring which is arranged on a cylinder cover body in an interference fit mode, wherein a first notch is formed in the inner wall of the valve seat ring towards the inner side, a second notch is formed in the surface, far away from the cylinder cover body, of the valve seat ring towards the inner side, the second notches are arranged in pairs and are arranged symmetrically with the center of the valve seat ring, and the center positions of the two second notches are consistent with the center position of the valve seat ring and are distributed symmetrically;
the bottom of second breach axial direction and valve seat circle surface distance are 0.2 ~ 0.3mm, the minimum distance of the inner wall of second breach and valve seat circle outer wall is 0.2 mm. The size can weaken the strength of the valve seat ring, ensure that the second notch is easy to break when being detached, and ensure that a key milling cutter cannot mill the cylinder cover body when machining;
the first notch is constructed into an annular arc-shaped groove, the distance between the bottom of the first notch in the axial direction and the bottom of the valve seat ring is 0.5mm, the maximum radial depth of the first notch is 2mm, the size can ensure that the cylinder cover body cannot be damaged by milling, and meanwhile, enough thickness is reserved on the first notch to ensure enough strength of a stress point;
the utility model can mill an annular arc-shaped gap, namely a first gap, in one direction of the inner wall of the valve seat ring by a machining mode, and the gap is used as a stress point for prying the valve seat ring; milling a cylindrical surface notch, namely a second notch, in the other two directions of the valve seat ring respectively, wherein a certain wall thickness distance is reserved between the bottom and the side wall of each notch and the cylinder cover body, and is used for weakening the strength of the seat ring; then a pry bar is inserted into the annular arc-shaped notch to pry the valve seat ring.
The utility model discloses the structure atress is reasonable, simple structure, and is with low costs, and the commonality is better, and valve seat circle dismantles efficiently.
Preferably, the axial cross section of the second notch is configured as a circular arc surface. Simple structure, the adoption key milling cutter processing of being convenient for.
Preferably, the axial depth of the first notch is 2-3 mm, the size requirement for inserting a crowbar tool is met, the enough thickness can be reserved on the valve seat ring by adopting a smaller size, namely, the distance between the upper part of the first notch and the surface of the valve seat ring far away from the cylinder cover body is kept at 4-5 mm, and the enough strength of a stress point is ensured.
Preferably, the connecting line of the centers of the first notch and the valve seat ring is perpendicular to the connecting line of the two second notches, and by adopting the structure, the best stress concentration effect can be ensured, the strength of the valve seat ring is convenient to weaken, and the valve seat ring is convenient to destructively remove during disassembly.
The utility model has the advantages that:
1. the utility model discloses simple structure, processing is convenient, and the commonality is high, can adapt to the valve seat circle of different model sizes and dismantle, and is efficient.
2. The utility model discloses a set up the breach of crowbar and the breach cooperation of weakening intensity to the cylinder head realizes dismantling simple operation, and equipment is simple, and is with low costs after prizing the valve seat circle for the fulcrum and destroying.
Drawings
Fig. 1 is a sectional structure view of a valve seat ring structure convenient to disassemble.
Fig. 2 is a sectional view taken along line B-B of fig. 1.
Fig. 3 is an enlarged view of a structure a in fig. 1.
Fig. 4 is a disassembly principle structure diagram of the valve seat ring structure convenient to disassemble.
Fig. 5 is a flow chart illustrating the steps of the disassembling method according to the present invention.
In the figure: 1-cylinder cover body, 2-valve seat ring, 201-first gap, 202-second gap and 3-crowbar.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific embodiments, which are illustrative of the invention and are not to be construed as unduly limiting the invention.
In the description of the present invention, it is to be understood that the terms "left", "right", "upper", "lower", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply specific orientations that the device or structure indicated must have, be constructed in specific orientations, and operations, and therefore, should not be construed as limiting the present invention.
Example 1:
as shown in fig. 1 and 2, a valve seat ring structure convenient to dismantle, includes valve seat ring 2 that interference fit set up on cylinder head body 1, the inner wall of valve seat ring 2 is provided with first breach 201 to the inboard, keeping away from cylinder head body 1 valve seat ring 2 surface is provided with second breach 202 to the inboard, second breach 202 sets up in pairs and sets up with valve seat ring 2 central symmetry, second breach 202 axial direction's bottom and valve seat ring 2 surface distance are 0.2 ~ 0.3mm, the inner wall of second breach 202 and the minimum distance with valve seat ring 2 outer wall are 0.2mm, first breach 201 constructs for cyclic annular circular arc type groove, the distance of first breach 201 axial direction bottom and valve seat ring 2 bottom is 0.5mm, the biggest radial depth of first breach 201 is 2 mm.
As shown in fig. 4, in the present embodiment, an annular arc-shaped notch is milled in one direction of the inner wall of the valve seat ring 2, and the notch serves as a force bearing point for prying the valve seat ring 2; milling a cylindrical surface notch in the other two directions of the valve seat ring 2 respectively, wherein a certain wall thickness distance is reserved between the bottom and the side wall of each notch and the cylinder cover body for weakening the strength of the seat ring; then a pry bar 3 is inserted into the annular arc-shaped notch to pry the valve seat ring 2.
Example 2:
as shown in fig. 1 and fig. 2, a valve seat ring structure convenient to disassemble includes a valve seat ring 2 disposed on a cylinder head body 1 in an interference fit manner, a first notch 201 is disposed on an inner side of an inner wall of the valve seat ring 2, a second notch 202 is disposed on an inner side of a surface of the valve seat ring 2 far away from the cylinder head body 1, the second notches 202 are disposed in pairs and are symmetrically disposed with respect to the center of the valve seat ring 2, and the center positions of the two second notches 202 are consistent with the center position of the valve seat ring 2 and are symmetrically distributed;
as shown in fig. 3, the distance d between the bottom of the second notch 202 in the axial direction and the lower surface of the valve seat 2 is 0.2-0.3 mm, and the minimum distance between the inner wall of the second notch 202 and the outer wall of the valve seat 2 is 0.2 mm. The size can weaken the strength of the valve seat ring 2, ensure that the second notch 202 is easy to break when being disassembled, and ensure that a key milling cutter cannot mill the cylinder cover body 1 when machining;
as shown in fig. 3, the first notch 201 is configured as an annular arc-shaped groove, the distance h between the bottom of the first notch 201 in the axial direction and the lower surface of the valve seat ring 2 is 0.5mm, and the maximum radial depth S of the first notch 201 is 2mm, which is a size that can ensure that the cylinder head body 1 is not damaged by milling, and meanwhile, enough thickness is reserved on the upper surface to ensure enough strength of a stress point;
as shown in fig. 2, in the present embodiment, the axial section of the second notch 202 is configured as a circular arc surface. Simple structure, the adoption key milling cutter processing of being convenient for.
As shown in fig. 3, in this embodiment, the axial depth H of the first notch 201 is 2 to 3mm, which meets the size requirement for inserting a tool of the pry bar 3, and a small size can ensure that a sufficient thickness is reserved above the valve seat 2, that is, the distance between the upper part of the first notch 201 and the surface of the valve seat 2 far away from the cylinder head body 1 is kept at 4 to 5mm, so as to ensure sufficient strength of a stress point.
In this embodiment, the line connecting the centers of the first notch 201 and the valve seat ring 2 is perpendicular to the line connecting the two second notches 202, and by adopting the structure, the best stress concentration effect can be ensured, the strength of the valve seat ring 2 can be weakened conveniently, and the valve seat ring 2 can be dismantled easily and destructively.
The method for disassembling the valve seat ring structure convenient to disassemble in the embodiment is used for disassembling the valve seat ring 2 during engine maintenance, and comprises the following steps as shown in fig. 5:
step 4, as shown in fig. 4, a pry bar 3 is inserted into the first notch 201, and the pry bar 3 is used for prying the valve seat ring 2.
As a further scheme of this embodiment, in step 4, the valve seat ring 2 is levered upward by using the cylinder head body 1 as a fulcrum, the valve seat ring 2 is broken at the two second notches 202 after being stressed, the half valve seat ring 2 at the stressed point is separated from the cylinder head body 1, and the remaining half valve seat ring 2 is taken out after the valve seat ring 2 is broken and loses the interference force. Insert the breach of cyclic annular circular arc type with crow bar 3, rely on the cylinder cap body to do as the fulcrum and upwards sled valve seat circle 2, the valve seat circle 2 atress back takes place to fracture at the weakest department of both sides face of cylinder breach, and the cylinder cap body 1 just can be deviate from to half seat circle of stress point, loses the interference power after, and remaining half seat circle just can easily take out.
As a further scheme of this embodiment, in step 2, the diameter phi of the T-shaped milling cutter is 20mm, the thickness is 2-3 mm, the structure is simple, the cost is low, the size requirement for inserting a prying bar 3 tool can be met, and the sufficient thickness can be reserved on the valve seat 2 by adopting a smaller size.
As a further aspect of this embodiment, in step 3, the key milling cutter has a diameter Φ of 12 mm.
As a further scheme of this embodiment, in step 1, the position of the cylinder head body 1 is corrected by clamping with a processing device, or the cylinder head is directly positioned and clamped with a tool clamp. The processing method is simple and the cost is low.
Claims (4)
1. The utility model provides a valve seat circle structure convenient to dismantle, includes valve seat circle (2) that interference fit set up on cylinder head body (1), its characterized in that: the inner wall of valve seat circle (2) is provided with first breach (201) to the inboard, keeping away from cylinder head body (1) valve seat circle (2) surface is provided with second breach (202) to the inboard, second breach (202) set up in pairs and set up with valve seat circle (2) central symmetry, second breach (202) axial direction's bottom and valve seat circle (2) surface distance are 0.2 ~ 0.3mm, the minimum distance of the inner wall of second breach (202) and valve seat circle (2) outer wall is 0.2mm, first breach (201) structure is cyclic annular circular arc type groove, the distance of first breach (201) axial direction bottom and valve seat circle (2) bottom is 0.5mm, the biggest radial depth degree of first breach (201) is 2 mm.
2. A valve seat ring structure facilitating disassembly as set forth in claim 1, wherein: the axial section of the second notch (202) is configured as a circular arc surface.
3. A valve seat ring structure easy to disassemble according to claim 1 or 2, wherein: the axial depth of the first notch (201) is 2-3 mm.
4. A valve seat ring structure easy to disassemble according to claim 1 or 2, wherein: the central connecting line of the first notch (201) and the valve seat ring (2) is vertical to the connecting line of the two second notches (202).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120595952.8U CN214741531U (en) | 2021-03-24 | 2021-03-24 | Valve seat ring structure convenient to dismantle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120595952.8U CN214741531U (en) | 2021-03-24 | 2021-03-24 | Valve seat ring structure convenient to dismantle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214741531U true CN214741531U (en) | 2021-11-16 |
Family
ID=78596643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120595952.8U Withdrawn - After Issue CN214741531U (en) | 2021-03-24 | 2021-03-24 | Valve seat ring structure convenient to dismantle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214741531U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112983588A (en) * | 2021-03-24 | 2021-06-18 | 广西玉柴机器股份有限公司 | Valve seat ring structure convenient to disassemble and disassembling method |
-
2021
- 2021-03-24 CN CN202120595952.8U patent/CN214741531U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112983588A (en) * | 2021-03-24 | 2021-06-18 | 广西玉柴机器股份有限公司 | Valve seat ring structure convenient to disassemble and disassembling method |
| CN112983588B (en) * | 2021-03-24 | 2024-01-02 | 广西玉柴机器股份有限公司 | Valve seat ring structure convenient to detach and detaching method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20211116 Effective date of abandoning: 20240102 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20211116 Effective date of abandoning: 20240102 |