CN212536002U - Symmetrical cylinder head cylinder block - Google Patents
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- CN212536002U CN212536002U CN202020638197.2U CN202020638197U CN212536002U CN 212536002 U CN212536002 U CN 212536002U CN 202020638197 U CN202020638197 U CN 202020638197U CN 212536002 U CN212536002 U CN 212536002U
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Abstract
The utility model discloses a symmetrical cylinder head cylinder block, one side of which is provided with a cylinder head, and a cylinder hole is arranged in the cylinder head; a process through hole penetrating through the cylinder block is formed in one side, close to the middle of the cylinder block, of the cylinder hole, and the central axis of the process through hole is perpendicularly intersected with the central axis of the cylinder hole; the process through hole forms symmetrical arc-shaped notches at the upper side and the lower side of the cylinder hole; according to the symmetrical cylinder head and cylinder seat, the process through holes which penetrate through the cylinder head from top to bottom are arranged, so that the cylinder head is of a symmetrical structure from top to bottom and from left to right, when the cylinder hole is machined and finished, the cylinder hole is uniformly stressed, the deformation is very small, the machining and assembling precision of the cylinder hole can be guaranteed, and the compressor is guaranteed to be small in leakage and high in efficiency during working.
Description
Technical Field
The utility model relates to the refrigerant compressor technical field, concretely relates to symmetry formula cylinder head cylinder block.
Background
The compressor is widely used in life and industry, and is a heart of a refrigeration system, and sucks low-temperature and low-pressure refrigerant gas from a suction pipe, drives a piston to compress the refrigerant gas through the operation of a motor, and discharges the high-temperature and high-pressure refrigerant gas to an exhaust pipe to provide power for a refrigeration cycle, so that the refrigeration cycle of compression → condensation → expansion → evaporation (heat absorption) is realized. The compressor generally comprises a housing, a motor, a cylinder block, a piston, control equipment (a starter and a thermal protector), a cooling system and the like. The cylinder block is used for installing and fixing the motor, the crankshaft and the piston, and the structural characteristics of the cylinder block directly influence the installation of other parts and the working performance of the whole compressor.
The cylinder hole of the cylinder block of the present refrigeration compressor has a plurality of structures: for example, for a detachable split type connecting rod, the air cylinder hole is integrated, and a crescent groove is not required to be formed in the upper part and the lower part, so that the structure is basically used for a commercial press with large cooling capacity; if again like to integral connecting rod, the crescent moon groove is opened to cylinder hole upper end, the connecting rod of being convenient for install during the assembly, the cylinder hole of this kind of structure has two kinds of structures as follows again: 1) the lower side of the cylinder hole is solid without a crescent groove, and 2) the lower side of the cylinder hole is a shallow blind crescent groove formed by machining.
For example, the Chinese utility model patent (publication number: CN206338170U) discloses a refrigeration compressor cylinder block in 2017, which comprises a cylinder block main body, wherein a vertical crankshaft hole is arranged in the middle of the cylinder block main body, a U-shaped connecting rod installation placing groove is arranged above one end of the cylinder hole close to the crankshaft hole, and an open U-shaped process groove lower than the bottom surface of the cylinder hole is arranged below the cylinder hole; the placing groove and the process groove of the cylinder seat are both formed by machining, and are formed by machining twice at least, the shape and the size are not consistent, and the cylinder hole is not favorable for machining and forming.
In addition, in order to reduce the leakage of the cylinder during the operation of the compressor, the fit clearance between the cylinder hole and the piston is controlled to be 0.005-0.01mm, and the precision is very high, while the existing structure has no crescent groove at the lower side of the crescent groove at the upper side of the cylinder hole or has asymmetric crescent grooves at the upper side and the lower side, and the cylinder hole can be deformed after the finish processing due to the asymmetry of the materials at the upper side and the lower side of the cylinder hole during the finish boring or honing of the cylinder hole (for example, the existing structure has the upper crescent groove and no lower crescent groove, the honing rod corresponding to the upper crescent groove is not stressed, and the honing rod at the other corresponding side of the cylinder hole is stressed to enable the honing rod to unilaterally extrude the processing precision), so that the precision of the cylinder hole is influenced, thereby the fit clearance between the piston and the cylinder hole is influenced, the leakage.
Disclosure of Invention
The utility model aims at providing a symmetry formula cylinder head cylinder block to the problem that prior art exists.
In order to achieve the above object, the utility model adopts the following technical scheme:
a cylinder head is arranged on one side of the cylinder seat, and a cylinder hole is formed in the cylinder head; a process through hole penetrating through the cylinder block is formed in one side, close to the middle of the cylinder block, of the cylinder hole, and the central axis of the process through hole is perpendicularly intersected with the central axis of the cylinder hole; the process through hole forms symmetrical arc-shaped notches on the upper side and the lower side of the cylinder hole.
According to the symmetrical cylinder head and cylinder seat, the process through holes which penetrate through the cylinder seat from top to bottom are formed in the cylinder seat, so that the cylinder head is of a symmetrical structure from top to bottom and from left to right, when the cylinder hole is machined and finished, the cylinder hole is uniformly stressed, the deformation is very small, the machining and assembling precision of the cylinder hole can be guaranteed, and the compressor is guaranteed to be small in leakage and high in efficiency during working.
The process through hole is arranged to take the arc-shaped notch out automatically, the arc-shaped notch at the upper part of the cylinder head can be used for installing a connecting rod, and an installation groove does not need to be machined on the cylinder head again, so that the working procedure is simplified;
due to the arrangement of the process through holes, the use of metal materials of the cylinder block is reduced, and the use cost of raw materials is reduced; meanwhile, the weight of the cylinder seat is reduced, the efficiency of the compressor is improved, and the power consumption is reduced;
the central axis of the process through hole is vertically intersected with the central axis of the cylinder hole, the central axis of the process through hole is vertically arranged, and the central axis of the cylinder hole is just horizontally arranged; the perpendicularity of the cylinder hole and the crankshaft hole is favorably kept during machining and forming.
Further, the arc-shaped notch comprises an upper arc-shaped notch and a lower arc-shaped notch; the upper arc-shaped notch is semicircular, and the outer contour of the upper arc-shaped notch and the upper arc of the cylinder head are in transition arrangement; the outer contour of one side of the lower arc-shaped notch is in transition arrangement with the bottom arc of the cylinder head, and the other side of the lower arc-shaped notch is in transition connection with the bottom arc of the cylinder seat and extends towards the middle of the cylinder seat.
The arc transition arrangement is beneficial to reducing stress concentration at a sharp corner or an acute angle, and is beneficial to dispersing and homogenizing stress or stress, so that the stress of the cylinder head and the cylinder hole is more uniform, and the structure is reasonable and stable;
the technical through hole is arranged on the front end surface (the surface close to the middle part of the cylinder seat) of the cylinder head and is in a semi-cylindrical shape as a whole, and the lower arc-shaped notch below the technical through hole is naturally and transitionally connected with the bottom of the cylinder seat to form a whole, so that the structural stability of the technical through hole is kept.
Furthermore, a first exhaust silencing cavity and an exhaust buffering cavity are symmetrically arranged on two sides of the cylinder head, and are respectively and integrally formed on the cylinder seat and are respectively arranged in a tangent manner with the front side wall of the cylinder head; and reinforcing ribs are arranged between the rear side wall of the cylinder head and the first exhaust silencing cavity and between the rear side wall of the cylinder head and the exhaust buffering cavity respectively.
The first exhaust silencing cavity and the exhaust buffering cavity are also arranged symmetrically, on one hand, the symmetrical design of the cylinder head is maintained, and the structure of the cylinder head is balanced and stabilized; on the other hand, the setting of exhaust cushion chamber can slow down the speed that the exhaust flows, is favorable to the noise reduction to improve the performance of compressor.
The arrangement of the reinforcing ribs plays a role in improving the connection strength and the structural stability of the cylinder head, and is favorable for maintaining the stability of processing and subsequent long-time work.
Furthermore, a second exhaust silencing cavity is further arranged on the cylinder seat, and the second exhaust silencing cavity is arranged close to the first exhaust silencing cavity and is provided with a ventilation communication hole.
The second exhaust silencing cavity can further reduce noise during exhaust, and further optimize the use performance of the compressor.
Furthermore, the back of the cylinder head is provided with four mounting positioning holes and a plurality of exhaust holes; the four mounting positioning holes are arranged at four corners of the cylinder head in a centrosymmetric manner.
The mounting positioning hole is used for mounting components such as a valve plate and a cylinder cover, and the exhaust holes are used for facilitating the outward discharge of the gas in the first exhaust silencing cavity and the second exhaust silencing cavity through the cylinder head.
Furthermore, a plurality of processing and positioning clamping bosses are arranged on the cylinder block close to the cylinder head and are symmetrically arranged on two sides of the cylinder head.
The symmetrically arranged processing positioning clamping bosses are convenient for stably clamping the cylinder block on a clamp during processing, clamping stress does not influence the cylinder head, and the processing accuracy is improved.
Furthermore, a crankshaft hole and a plurality of oil draining through holes are formed in the middle of the cylinder seat, and the oil draining through holes are arranged on the periphery of the crankshaft hole in a centrosymmetric manner; one of the oil draining through holes is staggered and communicated with the process through hole.
Due to the penetrating arrangement of the process through hole, if an oil leaching through hole exists at the position, the oil leaching through hole can be communicated with the lower end of the process through hole to form an integral structure at the bottom of the cylinder block; on one hand, the utility model is beautiful and practical, and on the other hand, the thin wall is avoided.
Further, the diameter of the process through hole is smaller than the diameter of the cylinder hole; and the process through hole, the front end surface of the cylinder head and the staggered surface of the cylinder hole are in arc transition arrangement. The arc transition is beneficial to reducing stress concentration, dispersing and homogenizing stress or stress, and the structure of the cylinder head is kept reasonable and stable.
Further, the cylinder block is processed from a cylinder block casting blank; and the cylinder seat casting blank is formed by sand casting and is cast with the process through hole.
The process through hole is cast in a casting mode, so that the process through hole is convenient and can save working procedures; and the process through hole is arranged in a penetrating way, the molding sand at the through hole is easy to clean, the conditions of molding sand accumulation and sand sticking are avoided, and the molding sand at the process through hole can be cleaned as long as the cylinder seat is normally shaked.
Further, a manufacturing method of the cylinder block comprises the following steps:
firstly, sand casting molding is carried out, when a casting sand mold is manufactured, a process through hole sand core is additionally arranged, the process through hole and the cylinder block are cast together to obtain a cylinder block casting blank, and arc-shaped notches at the upper part and the lower part of a cylinder head are automatically formed after shakeout cleaning;
secondly, machining and forming, namely drilling holes by adopting a drill pattern at a horizontal plane perpendicular to the process through hole along the cylinder head, then roughly boring, finely boring and honing for multiple times to form a cylinder hole; in the process of processing and forming, the drill flower, the boring cutter and the honing rod are stressed symmetrically. Therefore, the roundness of the cylinder hole and the cylindricity are guaranteed to be higher, and the verticality of the two holes of the cylinder hole and the crankshaft hole is better.
Compared with the prior art, the beneficial effects of the utility model are that: 1. according to the symmetrical cylinder head cylinder seat, the process through holes penetrating through the cylinder head up and down are arranged, so that the cylinder head is of a symmetrical structure up, down, left and right, the cylinder hole is uniformly stressed and has very small deformation when the cylinder hole is machined and finished, the machining and assembling precision of the cylinder hole can be ensured, and therefore the compressor is ensured to have small leakage and high efficiency during working; 2. the process through hole is arranged to take the arc-shaped notch out automatically, the arc-shaped notch at the upper part of the cylinder head can be used for installing a connecting rod, and an installation groove does not need to be machined on the cylinder head again, so that the working procedure is simplified; 3. due to the arrangement of the process through holes, the use of metal materials of the cylinder block is reduced, and the use cost of raw materials is reduced; meanwhile, the weight of the cylinder seat is reduced, the efficiency of the compressor is improved, and the power consumption is reduced; 4. the process through hole and the cylinder seat are in arc transition, so that stress concentration at a sharp angle or an acute angle is reduced, stress or stress is dispersed and homogenized, and the cylinder head and the cylinder hole are stressed more uniformly and structurally reasonably and stably.
Drawings
Fig. 1 is a schematic perspective view of a symmetrical cylinder head and cylinder block of the present invention;
fig. 2 is a schematic top view of a symmetrical cylinder head and cylinder block of the present invention;
fig. 3 is a schematic view of the symmetrical cylinder head cylinder block according to the present invention in the direction B;
FIG. 4 is a schematic sectional view of the symmetrical cylinder head and cylinder block of the present invention from the A-A direction;
FIG. 5 is a schematic structural view of a casting blank of a symmetrical cylinder head and cylinder block of the present invention;
in the figure: 1. a cylinder block; 2. a cylinder head; 3. a cylinder bore; 4. a through-process hole; 5. an upper arc-shaped notch; 6. a lower arc-shaped notch; 7. an exhaust buffer chamber; 8. a first exhaust silencing cavity; 9. a second exhaust silencing cavity; 10. reinforcing ribs; 11. processing a positioning clamping boss; 12. a crankshaft bore; 13. oil draining through holes; 14. installing a positioning hole; 15. an exhaust hole; 16. and (5) cylinder block casting blank.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "middle", "upper", "lower", "left", "right", "inner", "outer", 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, but 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 thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The first embodiment is as follows:
as shown in fig. 1 to 4, a cylinder head 2 is arranged on one side of a cylinder block 1, and a cylinder bore 3 is arranged in the cylinder head 2; a process through hole 4 penetrating through the cylinder block 1 is formed in one side, close to the middle of the cylinder block 1, of the cylinder hole 3, and the central axis of the process through hole 4 is perpendicularly intersected with the central axis of the cylinder hole 3; the process through hole 4 forms symmetrical arc-shaped notches at the upper side and the lower side of the cylinder hole 3.
According to the symmetrical cylinder head and cylinder seat, the process through holes 4 which penetrate through the cylinder seat 1 from top to bottom are arranged, so that the cylinder head 2 is of a symmetrical structure from top to bottom and from left to right, the cylinder hole 3 is uniformly stressed and has very small deformation when machining and fine machining of the cylinder hole 3 are carried out, the machining and assembling precision of the cylinder hole 3 can be guaranteed, and the compressor is guaranteed to have small leakage and high efficiency when working.
The process through hole 4 is arranged to take the arc-shaped notch out automatically, the arc-shaped notch at the upper part of the cylinder head 2 can be used for installing a connecting rod, and an installation groove does not need to be machined on the cylinder head, so that the working procedure is simplified;
due to the arrangement of the process through hole 4, the use of metal materials of the cylinder block 1 is reduced, and the use cost of raw materials is reduced; meanwhile, the weight of the cylinder block 1 is reduced, so that the efficiency of the compressor is improved, and the power consumption is reduced;
the central axis of the process through hole 4 is vertically intersected with the central axis of the cylinder hole 3, the process through hole 4 is vertically arranged, the central axis is vertical, and the central axis of the cylinder hole 3 is just horizontally arranged; the perpendicularity of the cylinder bore 3 to the crankshaft bore can be maintained advantageously during the forming process.
Further, the arc-shaped notch comprises an upper arc-shaped notch 5 and a lower arc-shaped notch 6; the upper arc-shaped notch 5 is semicircular, and the outer contour of the upper arc-shaped notch 5 is in transition arrangement with the upper arc of the cylinder head 2; the outer contour of one side of the lower arc-shaped notch 6 is in arc transition arrangement with the bottom of the cylinder head 2, and the other side of the lower arc-shaped notch is in arc transition connection with the bottom of the cylinder block 1 and extends towards the middle of the cylinder block 1.
The arc transition arrangement is beneficial to reducing stress concentration at a sharp corner or an acute angle, and is beneficial to dispersing and homogenizing stress or stress, so that the stress of the cylinder head 2 and the cylinder hole 3 is more uniform, and the structure is reasonable and stable;
the technical through hole 4 is arranged on the front end surface (the surface close to the middle part of the cylinder block 1) of the cylinder head 2 and is in a semi-cylindrical shape as a whole, and the lower arc-shaped notch 6 below the technical through hole is naturally and transitionally connected with the bottom of the cylinder block 1 to form a whole, so that the structural stability of the technical through hole is kept.
Further, a first exhaust silencing cavity 8 and an exhaust buffering cavity 7 are symmetrically arranged on two sides of the cylinder head 2, and the first exhaust silencing cavity 8 and the exhaust buffering cavity 7 are respectively integrally formed on the cylinder block 1 and are respectively arranged in a tangent mode with the front side wall of the cylinder head 2; reinforcing ribs 10 are arranged between the rear side wall of the cylinder head 2 and the first exhaust silencing cavity 8 and the exhaust buffering cavity 7 respectively.
The arrangement of the first exhaust silencing cavity 8 and the exhaust buffering cavity 7 is also symmetrical, on one hand, the symmetrical design of the cylinder head 2 is maintained, and the structure of the cylinder head is balanced and stabilized; on the other hand, the arrangement of the exhaust buffer chamber 7 can slow down the flowing speed of exhaust, which is beneficial to reducing noise, thereby improving the use performance of the compressor.
The arrangement of the pair of reinforcing ribs 10 plays a role in improving the connection strength and the structural stability of the cylinder head 2, and is beneficial to maintaining the stability during processing and subsequent long-time work.
Further, a second exhaust silencing cavity 9 is further arranged on the cylinder block 1, and the second exhaust silencing cavity 9 is arranged close to the first exhaust silencing cavity 8 and is provided with a ventilation communication hole.
The second exhaust silencing cavity 9 can further reduce the noise during exhaust, and further optimize the use performance of the compressor.
Furthermore, the back of the cylinder head 2 is provided with four mounting positioning holes 14 and a plurality of exhaust holes 15; the four mounting positioning holes 14 are arranged at four corners of the cylinder head 2 in a central symmetry manner.
The mounting positioning hole 14 is used for mounting components such as a valve plate and a cylinder cover, and the exhaust hole 15 is convenient for the gas in the first exhaust silencing cavity 8 and the second exhaust silencing cavity 9 to be discharged outwards through the cylinder head 2.
Furthermore, a pair of processing and positioning bosses 11 are arranged on the cylinder block 1 and close to the cylinder head 2, and the processing and positioning bosses 11 are symmetrically arranged on two sides of the cylinder head 2.
The symmetrically arranged processing positioning clamping bosses 11 are convenient for stably clamping the cylinder block 1 on a clamp during processing, clamping stress does not influence the cylinder head 2, and the processing accuracy is improved.
Furthermore, a crankshaft hole 12 and four oil draining through holes 13 are formed in the middle of the cylinder block 1, and the four oil draining through holes are arranged around the crankshaft hole 12 in a centrosymmetric manner; one of the oil drain through holes 13 is staggered with the process through hole 4 and is communicated with the lower arc-shaped notch 6.
Due to the penetrating arrangement of the process through hole 4, if an oil leaching through hole 13 exists at the position, the oil leaching through hole 13 can be communicated with the lower end of the process through hole 4 to form an integral structure at the bottom of the cylinder block 1; on one hand, the utility model is beautiful and practical, and on the other hand, the thin wall is avoided.
Further, the diameter of the process through hole 4 is smaller than the diameter of the cylinder bore 3; the technical through hole 4, the front end face of the cylinder head 2 and the staggered face of the cylinder hole 3 are in arc transition arrangement. The arc transition is beneficial to reducing stress concentration, dispersing and homogenizing stress or stress, and the structure of the cylinder head is kept reasonable and stable.
Example two:
this example provides the blank cast construction of the cylinder block of the first example.
As shown in fig. 5, the cylinder block 1 is machined from a cylinder block casting blank 16; the cylinder block casting blank 16 is formed by sand casting and is cast with the through-going bore 4.
The upper arcuate notch 5, the lower arcuate notch 6, etc. can all be cast together by a casting process.
The process through holes 4 are cast in a casting mode, so that the subsequent processing procedures can be saved conveniently; and the through-hole 4 is arranged in a penetrating way, the molding sand at the through-hole 4 is easy to clean, the molding sand is not accumulated or stuck, and the molding sand at the through-hole 4 can be cleaned as long as the molding sand is normally dropped along with the cylinder block 1.
Example three:
this embodiment provides a method of forming a cylinder block according to the first embodiment.
Specifically, one manufacturing method of the cylinder block 1 is as follows:
firstly, sand casting is carried out, when a casting sand mould is manufactured, a process through hole sand core is additionally arranged, the process through hole 4 and the cylinder block 1 are cast together to obtain a cylinder block casting blank 16, and an arc-shaped notch at the upper part and the lower part of a cylinder head is automatically formed after shakeout cleaning;
secondly, machining and forming, namely drilling holes by adopting a drill pattern at a horizontal plane perpendicular to the process through hole 4 along the cylinder head 2, then roughly boring, finely boring and honing for multiple times to form a cylinder hole 3; in the process of processing and forming, the drill flower, the boring cutter and the honing rod are stressed symmetrically. Thereby be favorable to guaranteeing the precision of the circularity and the cylindricity of cylinder hole 3 is higher, guarantees simultaneously that the two holes of cylinder hole and bent axle hole hang down straightness better.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A cylinder head is arranged on one side of the cylinder seat, and a cylinder hole is formed in the cylinder head; the cylinder is characterized in that a process through hole penetrating through the cylinder seat is formed in one side, close to the middle of the cylinder seat, of the cylinder hole, and the central axis of the process through hole is vertically intersected with the central axis of the cylinder hole; the process through hole forms symmetrical arc-shaped notches on the upper side and the lower side of the cylinder hole.
2. The symmetrical cylinder head cylinder block according to claim 1, wherein the arcuate notch comprises an upper arcuate notch and a lower arcuate notch; the upper arc-shaped notch is semicircular, and the outer contour of the upper arc-shaped notch and the upper arc of the cylinder head are in transition arrangement; the outer contour of one side of the lower arc-shaped notch is in transition arrangement with the bottom arc of the cylinder head, and the other side of the lower arc-shaped notch is in transition connection with the bottom arc of the cylinder seat and extends towards the middle of the cylinder seat.
3. The symmetrical cylinder head cylinder block according to claim 1, wherein a first exhaust muffling chamber and an exhaust buffering chamber are symmetrically arranged on two sides of the cylinder head, and the first exhaust muffling chamber and the exhaust buffering chamber are respectively and integrally formed on the cylinder block and are respectively arranged in a tangent manner with the front side wall of the cylinder head; and reinforcing ribs are arranged between the rear side wall of the cylinder head and the first exhaust silencing cavity and between the rear side wall of the cylinder head and the exhaust buffering cavity respectively.
4. A symmetrical cylinder head cylinder block according to claim 3, characterized in that a second exhaust muffler chamber is provided in the cylinder block, which second exhaust muffler chamber is provided adjacent to the first exhaust muffler chamber and is provided with a ventilation hole.
5. The symmetrical cylinder head and cylinder block of claim 1, wherein the back side of the cylinder head is provided with four mounting holes and a plurality of exhaust holes; the four mounting positioning holes are arranged at four corners of the cylinder head in a centrosymmetric manner.
6. The symmetrical cylinder head and cylinder block of claim 1, wherein the cylinder block is provided with a plurality of processing and positioning clamping bosses near the cylinder head, and the processing and positioning clamping bosses are symmetrically arranged on two sides of the cylinder head.
7. The symmetrical cylinder head and cylinder block of claim 1, wherein a crankshaft bore and a plurality of oil drainage through holes are formed in the middle of the cylinder block, and the plurality of oil drainage through holes are arranged around the crankshaft bore in a central symmetry manner; one of the oil draining through holes is staggered and communicated with the process through hole.
8. The symmetrical cylinder head cylinder block according to claim 1, wherein the process through bore has a diameter smaller than the diameter of the cylinder bore; and the process through hole, the front end surface of the cylinder head and the staggered surface of the cylinder hole are in arc transition arrangement.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020638197.2U CN212536002U (en) | 2020-04-24 | 2020-04-24 | Symmetrical cylinder head cylinder block |
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| CN202020638197.2U CN212536002U (en) | 2020-04-24 | 2020-04-24 | Symmetrical cylinder head cylinder block |
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| CN212536002U true CN212536002U (en) | 2021-02-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111550387A (en) * | 2020-04-24 | 2020-08-18 | 黄石东贝电器股份有限公司 | Symmetrical cylinder head cylinder block and manufacturing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111550387A (en) * | 2020-04-24 | 2020-08-18 | 黄石东贝电器股份有限公司 | Symmetrical cylinder head cylinder block and manufacturing method thereof |
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Effective date of registration: 20210617 Address after: No.6, East Jinshan Avenue, Huangshi economic and Technological Development Zone, Huangshi City, Hubei Province Patentee after: Huangshi Dongbei Compressor Co.,Ltd. Address before: No.6, East Jinshan Avenue, Huangshi economic and Technological Development Zone, Huangshi City, Hubei Province Patentee before: Huangshi Dongbei Electrical Appliance Co.,Ltd. |