CN112404935A - Iron-based valve plate and gasket insertion equipment - Google Patents

Iron-based valve plate and gasket insertion equipment Download PDF

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Publication number
CN112404935A
CN112404935A CN202011273293.2A CN202011273293A CN112404935A CN 112404935 A CN112404935 A CN 112404935A CN 202011273293 A CN202011273293 A CN 202011273293A CN 112404935 A CN112404935 A CN 112404935A
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China
Prior art keywords
valve plate
gasket
plate
push rod
iron
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Granted
Application number
CN202011273293.2A
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Chinese (zh)
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CN112404935B (en
Inventor
雷元龙
陈特欢
涂旺
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Ningbo University
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Ningbo University
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Priority to CN202011273293.2A priority Critical patent/CN112404935B/en
Publication of CN112404935A publication Critical patent/CN112404935A/en
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Publication of CN112404935B publication Critical patent/CN112404935B/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P19/00Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
    • B23P19/001Article feeders for assembling machines
    • B23P19/002Article feeders for assembling machines orientating the articles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P19/00Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P19/00Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
    • B23P19/001Article feeders for assembling machines

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sliding Valves (AREA)

Abstract

The invention discloses iron-based valve plate and gasket inserting equipment which comprises a base, a lower base, a finished product conveyor belt, a feeding hole and a discharging hole, wherein the lower base is arranged on one side of the base; the base is provided with a conveying partition plate, and the lower part of the conveying partition plate is provided with at least one partition part for changing the conveying direction of the valve plate and controlling the moving path. The invention can serially insert a plurality of valve plates and gaskets at one time through the transmission partition plate, and can sense the in-place condition of the gaskets and the valve plates in the separation chamber through the sensor to avoid errors, and finally, the push-pull rod is used for realizing various required functions.

Description

Iron-based valve plate and gasket insertion equipment
Technical Field
The invention belongs to the technical field of insertion of a valve plate and a gasket, and particularly relates to iron-based valve plate and gasket insertion equipment.
Background
Experiments show that: the iron-based valve plates produced in batches by adopting a powder metallurgy method are sintered in a charging furnace, and in the shaping process, the valve plate grooves are staggered, so that the heating uniformity of the valve plates is improved, and the structural stress and the thermal stress are uniformly distributed during sintering and cooling. Therefore, the mechanical property and the finished product surface quality of the sintered valve plate can be obviously improved.
However, at present, the work of the partition valve plate is mainly realized by manpower, and the manual realization mode requires a large amount of labor and is low in efficiency. In the mass production process, the equipment capable of automatically separating the valve plate is very important in the aspects of improving the labor productivity and improving the reference energy.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the automatic insertion equipment for separating the valve plate and the gasket, which has high efficiency and wide application range.
In order to achieve the purpose, the invention adopts the following technical scheme: an iron-based valve plate and gasket inserting device comprises a base, a lower base arranged on one side of the base, a finished product conveyor belt arranged on the base, a conveyor belt arranged on the base, and a feeding port and a discharging port which are arranged on the conveyor belt; the base is provided with a conveying partition plate, and the lower part of the conveying partition plate is provided with at least one partition part for changing the conveying direction of the valve plate and controlling the moving path.
According to the invention, the valve plates are separated for transportation through the arrangement of the separating piece, and the valve plates which are transported transversely are converted into vertical transportation, so that a plurality of valve plates can work at one time, the working efficiency is improved, and the automatic insertion of the separating valve plates and the gaskets is realized.
Further, a gap is formed between the separating piece and the conveyor belt. Through the setting in clearance, avoid scraping the conveyer belt, guaranteed the quality of conveyer belt for stability when the work piece transports.
Furthermore, the top end of the separator is in an arc shape, and the tail end of the separator is provided with a conveying roller in a penetrating mode. Set up the arc shape through the top, the valve plate can not the scratch when the transportation, and can follow the separator transformation direction, ensures can not because of a plurality of valve plate card between two separators, secondly through the conveying gyro wheel, when the work piece when the transportation, reduces frictional force for it is more smooth and easy when the work piece transportation.
Furthermore, be equipped with the feeding on the conveying baffle tail end and detect and the control unit, the feeding detects and the control unit includes the base, locates the cylinder on the base and locates the gate on the cylinder. Through the setting of gate, control input speed and avoid the valve plate neglected loading to guarantee no longer that the feeding causes the valve plate to pile up, improved the stability that work goes on.
Furthermore, a separating device is arranged on the conveying partition plate, the separating device comprises a feeding buffer stacking chamber, a separating chamber arranged below the feeding buffer stacking chamber, and a baffle plate capable of being turned up and down along the separating chamber, and a rod piece is arranged on the baffle plate. The baffle is opened by pushing the rod piece, the opening and the closing are carried out, the finished product is pushed and taken more conveniently, and then the baffle can be slowly closed in the return stroke process of the push rod.
Further, a sensor is arranged in each grid of the feeding buffer stacking chamber, and the sensor is electrically connected with the air cylinder. Through setting up the sensor, when the sensor senses that a compartment is full of the valve plate, can transmit for the feeding and detect and control the corresponding gate of part control and close to guarantee no longer that the feeding causes the valve plate to pile up
Furthermore, the partition chamber is provided with a through hole, and the height of the through hole corresponds to the height of the valve plate hole. Through the setting of through-hole, guaranteed valve plate and the corresponding stability of through-hole, guaranteed the stability that work goes on next.
Further, a propelling device and a wire stringing device are arranged on the lower base, and the propelling device comprises an electric push rod, a push plate arranged on the electric push rod, a valve plate push rod arranged on the push plate, a gasket push rod, a spring door push rod and a finished product push rod; the lengths of the valve plate push rod, the gasket push rod and the spring door push rod are set from long to short, the lengths of the spring door push rod and the finished product push rod are consistent, and the spring door push rod is in contact with the rod piece. Through setting up thrust unit, can accomplish multiple required effect respectively, valve plate push rod and gasket push rod homoenergetic change length through spring wherein, control the size of propelling movement power, promote valve plate and gasket to the assigned position, open the spring door of location valve plate and gasket, the valve plate and the gasket that the release has been stringed the iron wire transfer to next process to the conveyer belt, slowly close the spring door.
Furthermore, the valve plate push rod is provided with a convex part for lifting the gasket, and the valve plate push rod is internally provided with a telescopic piece. Through the setting of convex part for the gasket can be better lift up and install, and operation process is labour saving and time saving more.
Further, the stringing device comprises a feeding frame, a feeding hopper arranged on the feeding frame, an inclined arc plate arranged in the feeding hopper, a chute arranged on the feeding hopper, and a guide plate arranged on the feeding frame, wherein a driving part used for pushing the stringing wire into the through hole is arranged on the guide plate. Can release the cluster silk of fixing a position through the drive spare, cluster the valve plate and the gasket of alternate distribution, realize automatic cluster silk, secondly the setting of slope arc board has guaranteed the stability of unloading for the unloading is more smooth and easy, and the deflector has played the effect of direction to the cluster silk at last, guarantees the stability of propelling movement in-process.
In conclusion, the invention has the following advantages: the invention provides automatic inserting equipment for separating a valve plate and a gasket, which is high in efficiency and wide in application range. 2. At present, automatic valve plate inserting equipment is realized through a robot hand, one valve plate and one gasket are inserted at a time, the efficiency is low, the error rate is high, and a plurality of valve plates and gaskets can be inserted in series at a time. 3. At present, the mistake proofing of manual insertion and mechanical manual insertion is mainly realized through naked eye identification, and the invention can avoid errors by sensing the in-place condition of the gasket and the valve plate in the separation chamber through the infrared sensor. 4. The transverse transportation of the blocky valve plate is controlled to be changed into the vertical transportation through gravity and the chute. 5. At present, one-step simple mechanical action can only complete one function, and the invention realizes various required functions through one-step simple push-pull rod action. .
Drawings
Fig. 1 is a first structural schematic diagram of the present invention.
Fig. 2 is a second structural schematic diagram of the present invention.
Fig. 3 is a left side view of the present invention.
Fig. 4 is a cross-sectional perspective view taken along a-a in fig. 3.
Fig. 5 is a partial sectional perspective view taken along B-B in fig. 3.
FIG. 6 is a schematic view of the feed detection and control unit of the present invention.
Fig. 7 is a schematic view of the structure of the partition plate of the present invention.
Fig. 8 is a schematic view of the separator structure of the present invention.
Fig. 9 is a partial cross-sectional perspective view taken along line C-C in fig. 3.
Fig. 10 is a schematic view of the structure of the separating device of the present invention.
Fig. 11 is a schematic structural view of the propulsion device of the present invention.
Fig. 12 is an enlarged view of a structure shown in fig. 2.
Fig. 13 is a schematic view of a cross-sectional three-dimensional structure of the stringing device of the present invention.
Fig. 14 is an exploded view of the valve stem of the present invention.
FIG. 15 is a schematic view of a valve plate and a gasket.
Detailed Description
As shown in fig. 1 to 15, in the present embodiment, the valve plate 250 is a rectangular parallelepiped shape with a diameter of 100 × 80 × 8mm, and circular holes with a diameter of 12mm are formed at four corners of the valve plate, which are 11.5mm away from four sides, respectively, and the edges of the circular holes are chamfered. The spacer 260 is a circular spacer with an inner diameter of 16mm, an outer diameter of 20 mm and a thickness of 4 mm.
As shown in fig. 1-13, an iron-based valve plate and gasket inserting apparatus includes a base 1, a lower base 2, a finished product conveyor 3, a conveyor 4, a feeding port 40 and a discharging port 41; the number of the bases 1 is 2, and the 2 bases 1 are not in contact and have a certain distance; the lower base 2 is arranged in the middle of the lower parts of the 2 bases 1, and the bottoms of the bases 1 are in contact with the ground; the finished product conveyor belt 3 is arranged on one side of the lower base 2 and used for conveying finished workpieces, and the finished product conveyor belt 3 is the prior art and is not described again; the number of the conveyor belts 4 is equal to that of the base 1, the conveyor belts 4 are arranged in 2 and are in one-to-one correspondence, the conveyor belts 4 are arranged on the base 1, and the conveyor belts 4 are in the prior art and are not described again; the feed inlet 40 is arranged on one side of the conveyor belt 4, the discharge outlet 41 is arranged on the other side of the conveyor belt 4, and the discharge outlets 41 of the 2 conveyor belts 4 are oppositely arranged.
Specifically, be equipped with conveying baffle 10 on base 1, this conveying baffle 10 links firmly with base 1, the stability of conveying baffle 10 has been guaranteed, conveying baffle 10 is located conveyer belt 4 directly over, the tail end of conveying baffle 10 corresponds with discharge gate 41, the head end of conveying baffle 10 corresponds with feed inlet 40, further say in detail, the tail end of conveying baffle 10 is equipped with transfer rail 100, transfer rail 100 has 2 corners, the setting of this transfer rail 100, make the valve plate have horizontal transportation to become vertical gliding, the valve plate is in gliding corner probably change the direction down, change into long limit "ground" by narrow limit "ground", but do not influence follow-up cartridge step, the valve plate continues the gliding shape.
Specifically, the lower part of the conveying partition plate 10 is provided with at least one partition 11 for changing the conveying direction of the valve plate and controlling the moving path, the partition 11 is arranged on the bottom surface of the conveying partition plate 10 and fixedly connected, in this embodiment, the partition 11 is provided with a plurality of partitions, which can be arranged according to specific situations, and in other embodiments, the partition 11 can be provided with 1 or more than 2 partitions, further, in detail, a gap 12 is formed between the partition 11 and the conveyor belt 4, so as to prevent the partition from scratching the conveyor belt 4, an arc shape 13 is arranged at the top end of the partition 11, a conveying roller 14 is arranged at the tail end of the partition 11 in a penetrating manner, and through the arrangement of the arc shape 13, the valve plate is ensured not to be scratched during transportation, and the direction of the partition 11 can be changed, so as to ensure that the valve.
Specifically, a feeding detection and control component 5 is arranged at the tail end of the conveying partition plate 10, and the feeding detection and control component 5 comprises a base 50, an air cylinder 51 and a gate 52; the number of the bases 50 is equal to that of the conveying partition plates 10, the number of the bases is 2, and the bases 50 are fixedly connected with the upper parts of the tail ends of the conveying partition plates 10; the number of the air cylinders 51 is multiple, the number of the air cylinders 51 can be arranged according to specific conditions, the air cylinders 51 are uniformly arranged on the base 50 at intervals, and the air cylinders 51 are in the prior art and are not described again; the number of the gates 52 is equal to the number of the cylinders 51, and the cylinders 51 can control the gates 52 to move up or down in a one-to-one correspondence.
Specifically, a separating device 6 is arranged on the conveying partition plate 10, and the separating device 6 comprises a feeding buffer stacking chamber 60, a separating chamber 61 and a baffle plate 62; the feeding buffer stacking chamber 60 is provided with valve plate chambers and gasket chambers which are arranged alternately, the thickness of corresponding interlayers corresponds to the thickness of a valve plate and a gasket, the direction of the valve plate and the gasket in the descending process is ensured, the gasket chamber is large and can contain a large gasket, the feeding frequency is reduced, furthermore, a sensor is arranged at the middle layer in each chamber in the feeding buffer chamber, the sensor is an infrared sensor which is available in the prior art, through the arrangement of the sensor, when the sensor 64 senses that the valve plate is filled in each chamber, the sensor can be transmitted to the feeding detection and control part 5 to control the corresponding gate 52 to be closed, so that the valve plate stacking caused by no feeding is ensured, the sensor 64 is electrically connected with the cylinder 51, and the opening and closing of the cylinder 51 are controlled; the separation chamber 61 is arranged at the lower part of the feeding buffer stacking chamber 60, a through hole 610 is formed in the separation chamber 61, and the height of the through hole 610 corresponds to the height of the valve plate hole; the panel 62 can be flipped up and down along the compartment 61, and the panel 62 is provided with a bar 63, and the panel 62 is a spring door of the prior art and is commercially available.
Specifically, a propelling device 7 and a wire stringing device 8 are arranged on the lower base 2, and the propelling device 7 comprises an electric push rod 70, a push plate 71, a valve plate push rod 73, a gasket push rod 72, a spring door push rod 74 and a finished product push rod 75; the electric push rod 70 is arranged on the lower base 2, and the electric push rod 70 is the prior art and is not described again; the push plate 71 is arranged on the electric push rod 70, the electric push rod 70 can drive the push plate 71 to move, furthermore, slide rails 710 are arranged on two sides of the push plate 71, the push plate 71 moves along the tracks of the slide rails 710, and the slide rails 710 restrict the push plate 71 to move; the valve plate push rod 73, the gasket push rod 72, the spring door push rod 74 and the finished product push rod 75 are all arranged on the push plate 71, one end of the valve plate push rod 73 is provided with a convex part 731, the inside of the valve plate push rod 73 is provided with a telescopic part 7311 which is a spring, a baffle which is opened by pushing a rod body outside is ensured through the arrangement of the telescopic part, the length of the valve plate push rod 73 and the length of the gasket push rod 72 can be changed through the spring in the valve plate push rod, the size of the pushing force is controlled, one end of the plate 720 which is bent by aluminum and fixed by a screw is arranged, the stress area of the valve plate and the gasket when pushing is increased through the plate 720, the length of the upper part of the plate 720 is larger than the movable length of the plate in the corresponding separation chamber 61, and when the rod 63 pushes the valve plate and the gasket out, the valve plate and the gasket fall, the spring door push rod 74 pushes the rod piece 63 to open the baffle plate 62, so that the finished product push rod 75 pushes out the stringed finished product conveniently, the baffle plate 62 can be closed slowly in the return stroke of the push rod, and the finished product push rod 75 pushes out the valve plate and the gasket stringed with the iron wire by pushing the stringed wire. The pushing device 7 can complete various required functions by a simple pushing and retracting action once, push the valve plate and the gasket to a specified position, open the baffle 62 for positioning the valve plate and the gasket, push the valve plate and the gasket which are strung with iron wires out to a conveying belt, transfer the valve plate and the gasket to the next procedure, and slowly close the baffle 62.
Specifically, the stringing device 8 comprises a feeding frame 80, a feeding hopper 81, an inclined arc plate 82, a sliding groove 83 and a guide plate 84; the feeding frame 80 is fixedly connected to the lower base 2; the feeding hopper 81 is placed inside the feeding frame 80; one end of the inclined arc plate 82 is fixedly connected to the inside of the feeding hopper 81, the other end of the inclined arc plate is arranged in an arc shape and is not connected with the inside of the feeding hopper 81, and the arc shape arrangement ensures that materials fall more smoothly; the sliding chute 83 is provided with 2L-shaped plates, materials pass through a crack in the middle of the 2L-shaped plates, one end of the sliding chute 83 is fixedly connected to the feeding hopper 81, and the other end of the sliding chute is far away from the feeding hopper 80; the guide plate 84 is fixedly connected to the feeding frame 80; a driving piece 9 for pushing the stringing yarns into the through hole 610 is arranged on the guide plate 84; inside the material was at first placed at the feeding funnel, when the silk was strikeed to needs, the silk was strikeed from slope arc board and is removed, through the spout, drops to the deflector from the spout again on, starts the driving piece, and the driving piece pushes the material and enters into the through-hole in, carries out the silk string to the valve plate.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims shall not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the embodiments may be appropriately combined to form other embodiments understood by those skilled in the art.

Claims (10)

1. An iron-based valve plate and gasket inserting device comprises a base (1), a lower base (2) arranged on one side of the base (1), a finished product conveyor belt (3) arranged on the lower base (2), a conveyor belt (4) arranged on the base (1), and a feeding hole (40) and a discharging hole (41) arranged on the conveyor belt (4); the method is characterized in that: the base (1) is provided with a conveying partition plate (10), and the lower part of the conveying partition plate (10) is provided with at least one partition (11) for changing the conveying direction of the valve plate and controlling the moving path.
2. The iron-based valve plate and gasket cartridge apparatus of claim 1, wherein: a gap (12) is arranged between the separating piece (11) and the conveyor belt (4).
3. The iron-based valve plate and gasket cartridge apparatus of claim 1, wherein: the top end of the separator (11) is in the shape of an arc (13), and a conveying roller (14) penetrates through the tail end of the separator (11).
4. The iron-based valve plate and gasket cartridge apparatus of claim 1, wherein: the feeding detection and control device is characterized in that a feeding detection and control component (5) is arranged at the tail end of the conveying partition plate (10), and the feeding detection and control component (5) comprises a base (50), an air cylinder (51) arranged on the base (50) and a gate (52) arranged on the air cylinder (51).
5. The iron-based valve plate and gasket cartridge apparatus of claim 1, wherein: the conveying partition plate (10) is provided with a separating device (6), the separating device (6) comprises a feeding buffer stacking chamber (60), a separating chamber (61) and a baffle (62) which can be turned up and down along the separating chamber (61), and a rod piece (63) is arranged on the baffle (62).
6. The iron-based valve plate and gasket cartridge apparatus of claim 5, wherein: a sensor is arranged in the feeding buffer stacking chamber (60), and the sensor is electrically connected with the cylinder (51).
7. A mounting device for an iron-based valve plate and gasket according to claim 5, wherein the compartment (61) is provided with a through hole (610), and the height of the through hole (610) corresponds to the height of the valve plate hole.
8. The iron-based valve plate and gasket mounting equipment according to claim 1, wherein a propelling device (7) and a threading device (8) are arranged on the lower base (2), the propelling device (7) comprises an electric push rod (70), a push plate (71) arranged on the electric push rod (70), a gasket push rod (72) arranged on the push plate (71), a valve plate push rod (73), a spring door push rod (74) and a finished product push rod (75); the spring door push rod (74) is contacted with the rod piece (63).
9. The iron-based valve plate and gasket mounting apparatus of claim 8, wherein said valve plate push rod (73) is provided with a protrusion (731), and said valve plate push rod (73) is provided with a telescopic member (7311).
10. The iron-based valve plate and gasket cartridge apparatus of claim 8, wherein: the stringing device (8) comprises a feeding frame (80), a feeding hopper (81) arranged on the feeding frame (80), an inclined arc plate (82) arranged in the feeding hopper (81), a sliding groove (83) arranged on the feeding hopper (81), and a guide plate (84) arranged on the feeding frame (80), wherein a driving piece (9) used for pushing stringing yarns into the through hole (610) is arranged on the guide plate (84).
CN202011273293.2A 2020-11-13 2020-11-13 Iron-based valve plate and gasket insertion equipment Active CN112404935B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011273293.2A CN112404935B (en) 2020-11-13 2020-11-13 Iron-based valve plate and gasket insertion equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011273293.2A CN112404935B (en) 2020-11-13 2020-11-13 Iron-based valve plate and gasket insertion equipment

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CN112404935A true CN112404935A (en) 2021-02-26
CN112404935B CN112404935B (en) 2022-04-15

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203371254U (en) * 2013-07-10 2014-01-01 佛山市广顺电器有限公司 Automatic oilless air compressor cylinder cover and valve plate assembling mechanism
EP2924309A2 (en) * 2014-03-26 2015-09-30 Schaeffler Technologies GmbH & Co. KG Plate spring device with pressure piece
KR20180031545A (en) * 2017-02-02 2018-03-28 구연진 Combination structure between deck-plate and spacer using press bolt
CN109202400A (en) * 2018-10-12 2019-01-15 四川长虹电器股份有限公司 Assembly device for compressor cylinder head assembly valve plate

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203371254U (en) * 2013-07-10 2014-01-01 佛山市广顺电器有限公司 Automatic oilless air compressor cylinder cover and valve plate assembling mechanism
EP2924309A2 (en) * 2014-03-26 2015-09-30 Schaeffler Technologies GmbH & Co. KG Plate spring device with pressure piece
KR20180031545A (en) * 2017-02-02 2018-03-28 구연진 Combination structure between deck-plate and spacer using press bolt
CN109202400A (en) * 2018-10-12 2019-01-15 四川长虹电器股份有限公司 Assembly device for compressor cylinder head assembly valve plate

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
任枭荣 等: "压电纤维致动的仿鲤鱼尾鳍式小型推进器的摆动特性及流固耦合机理", 《机械工程学报》 *

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