GB2489973A - Valve spring seat supply apparatus - Google Patents

Valve spring seat supply apparatus Download PDF

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Publication number
GB2489973A
GB2489973A GB1106308.8A GB201106308A GB2489973A GB 2489973 A GB2489973 A GB 2489973A GB 201106308 A GB201106308 A GB 201106308A GB 2489973 A GB2489973 A GB 2489973A
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GB
United Kingdom
Prior art keywords
main shaft
suction
spring seat
shroud
valve spring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB1106308.8A
Other versions
GB201106308D0 (en
GB2489973B (en
Inventor
David Tunks
Maurice Farnhill
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honda Motor Co Ltd
Original Assignee
Honda Motor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Priority to GB1106308.8A priority Critical patent/GB2489973B/en
Publication of GB201106308D0 publication Critical patent/GB201106308D0/en
Publication of GB2489973A publication Critical patent/GB2489973A/en
Application granted granted Critical
Publication of GB2489973B publication Critical patent/GB2489973B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P19/00—Machines 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
    • B23P19/04—Machines 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 for assembling or disassembling parts
    • B23P19/042—Machines 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 for assembling or disassembling parts specially adapted for combustion engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
    • B25B11/005—Vacuum work holders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P19/00—Machines 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
    • B23P19/04—Machines 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 for assembling or disassembling parts
    • B23P19/042—Machines 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 for assembling or disassembling parts specially adapted for combustion engines
    • B23P19/045—Machines 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 for assembling or disassembling parts specially adapted for combustion engines for assembling valve cotters and retainers of engine valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/10—Connecting springs to valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/22—Valve-seats not provided for in preceding subgroups of this group; Fixing of valve-seats
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2303/00—Manufacturing of components used in valve arrangements
    • F01L2303/01—Tools for producing, mounting or adjusting, e.g. some part of the distribution
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2820/00—Details on specific features characterising valve gear arrangements
    • F01L2820/03—Auxiliary actuators
    • F01L2820/034—Pneumatic engines

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Manipulator (AREA)

Abstract

The valve spring seat supply apparatus (10, Figure 1) is used for holding a valve spring seat (2, Figure 5) and for supplying the valve spring seat to a valve guide provided in a cylinder head of an engine. The apparatus includes a main shaft 20, a shroud 21, a suction flow passage 30, a suction surface 23 and a projection portion 32. The shroud 21 is concentrically disposed with the main shaft. The suction flow passage 30 is formed between the main shaft and the shroud. The suction surface 23 is provided on a leading end of the suction flow passage and adapted to suck and hold the valve spring seat. The projection portion 32 is provided between an outer peripheral surface of the main shaft and an inner peripheral surface of the shroud. A section area of the suction flow passage at the suction surface is narrowed by the projection portion 32. A negative pressure generating device may be used to suck air in the suction flow passage 30.

Description

VALVE SPRING SEAT SUPPLY APPARATUS
BACKGROUND OF THE INVENTION
<FIELD OF THE INVENTION>
[0001] The present invention relates to a valve spring seat supply apparatus which holds a valve spring seat and supplies it to a valve guide provided in a cylinder head of an engine.
<RELATED ART> [0002] Conventionally, there is proposed a stem seal and spring seat supply/assemble apparatus which simultaneously supplies and assembles a valve stem seal and a valve spring seat to a valve guide provided in a cylinder head, thereby enhancing an assembling precision of the respective composing parts (see, for example, JP-A-2007-331063) . Also, as shown in Fig. 6, there is also known a supply apparatus 100 in which multiple suctionheads 102 are slidablymountedona frame 101 andmultiple sets of valve stem seals 1 and valve spring seats 2 (see Fig. 7) sucked by the respective suction heads 102 are collectively supplied to a valve guide 3 provided in a cylinder head.
[0003] In the conventional supply apparatus 100 shown in Fig. 6, the multiple suction heads 102 respectively energized downwardly in Fig. 6 by their associated compression springs 103 are slidably fitted with the frame 101, and a mounting portion 104 formed on an upper portion of the frame 101 is fixed to a transfer machine (not shown) which is structured to move between a parts supply position and a cylinder head S assembling position. The suction heads 102 can tilt at an angle of substantially 15° according to an angle of the valve guide 3 of the cylinder head.
[0004] Fig. 7 is a section view of main portions of the suction head shown in JP-A-2007--331063. To the supply apparatus 100 shown in Fig. 6, there is also applied a suction head which is similar in structure to the suction head shown in Fig. 7.
The suction head 102 has a dual-structure cylindrical member 107 including an inner cylinder 105 and an outer cylinder 106 respectively having a cylindrical shape. The suction head 102 further includes, in a lower end portion of the inner cylinder 105, a cup-shaped seal hold member 108 opened downwardly and a center pin 109 downwardly projected from a bottom portion of the seal hold member 108. A circular space 110, which is formed between the inner and outer cylinders 105 and 106 and is opened downwardly in a lower end of the cylindrical member 107, is connected to a negative pressure generating device (riot shown) through joints 111 and air tubes 112 (see Fig, 6).
[0005] In the thus structured suction head 102, in order to hold the valve stem seal 1, an outer periphery of an upper portion of the valve stem seal 1 may be fitted with an inner periphery of the downwardly opened cup-shaped seal hold member 108 and an inner periphery of the upper portion of the valve stem seal 1 may be fitted with the center pin 109. In order to suck and hold the valve spring seat 2 onto the lower end of the cylindrical member 107, the lower end of the cylindrical member 107 may be contacted with a flange portion 2a of the valve spring seat 2 and the negative pressure generating device may be operated to suck an air in the circular space 110, [0006] However, according to the conventional supply apparatus 100, since a suction force of the suction head 102 for sucking the valve spring seat 2 is not always sufficient, there is a possibility that the suction head 102 cannot properly suck the valve spring seat 2. That is, due to a trouble caused by such poor suction, there is raised a problem that an operating rate of the supply apparatus 100 can be lowered. In addition, since the conventional suction head 102 includes a large number of composing parts, the supply apparatus 100 is heavy in weight and is thus hard to handle. That is, in the conventional suction head 102 and supply apparatus 100, there is room to be improved.
SU}(ARY OF THE INVENTION [0007] One or more embodiments of the invention provide a valve spring seat supply apparatus which can surely suck a valve spring seat using a simple mechanism and is highly reliable.
[00081 According to one or more embodiments of the invention, in a valve spring seat supply apparatus for holding a valve spring seat and for supplying the valve spring seat to a valve guide provided in a cylinder head of an engine, the apparatus may include a main shaft, a shroud concentrically disposed with the main shaft, a suction flow passage formed between the main shaft and the shroud and having a circular section, a suction surface provided on a leading end of the suction flow passage and adapted to suck and hold the valve spring seat, and a projection portion provided between an outer peripheral surface of the main shaft and an inner peripheral surface of the shroud. A section area of the suction flow passage at the suction surface may be narrowed by the projection portion.
[0009] Other aspects and advantages of the invention will be apparent from the following description and the appended claims.
BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Fig. 1 is a schematic side view of a valve spring seat supply apparatus according to an exemplary embodiment of the invention.
Fig. 2 is anexplanatoryblockviewofanegativepressure generating device employed in a valve spring seat supply apparatus.
S Fig. 3 is a perspective view of the outer shape of a suction head for sucking and holding a valve spring seat.
Fig. 4 is a sectional perspective view of the Suction head shown in Fig. 3.
Fig. 5 is a section view of main portions of a suction head for holding a valve stem seal and a valve spring seat.
Fig. 6 is a schematic side view of a conventional valve spring seat supply apparatus.
Fig. 7 is a section view of a conventional suction head.
DETAILED DESCRIPTION OF TUE EXEMPLARY EMBODIMENTS
[0011] An exemplary embodiment of the invention is described with reference to the accompanying drawings. The same reference numerals indicate the same parts in the various views.
[0012] As shown in Fig. 1, inavalve spring seat supplyapparatus of the exemplary embodiment, a total of sixteen suction heads (suction tools) 11 are arranged in two lines. The suction heads 11 are fitted with a pair of lateral support bars 13 and 14 of a frame 12 in such a manner that the suction heads 11 are allowed to slide in a vertical direction in Fig. 1.
The suction heads 11 arranged in the two lines can tilt for example, in a range of 15°, according to an inclination angle of a valve guide 3 (see Fig. 5) of a cylinder head, so that the suction heads 11 incline in the same inclination angle with the valve guide 3. Further, a whole of the frame 12 may tilt at a given angle, or the suction heads 11 may move with respect to the frame 12, so as to tilt the suction heads 11.
[0013] Between the respective suctionheads 11 and lower lateral support bar 13, compression springs 15 are respectively interposed. The suction heads 11 are respectively urged downwardly in Fig. 1, by their associated compression springs 15. Double nuts 16 are threadedly engaged with a main shaft 20 (which will be discussed in detail later) of each suction head 11 which is projected upwardly from the upper lateral support bar 14.
[0014] The double nuts 16 are respectively in contact with an upper surface of the lateral support bar 14 by spring forces of the compression springs 15 which are always urging their associated suction heads 11 downwardly. By rotating the double nuts 16 so as to adjust vertical positions of the double nuts 16 with respect to the main shafts 20, vertical positions of the suction heads 11 can be adjusted. Accordingly, heights of the suction heads 11 can be respectively adjusted so as to be optimum when the suction heads 11. suck and hold the valve stem seals 1 and valve spring seats 2 thereon. Joints 18 are provided on upper ends of the respective main shafts 20, and the main shafts 20 are connected through their respective air tubes 17 to a negative pressure generating device 40.
[0015] As shown in Fig. 2, the negative pressure generating device 40 includes an air supply 41, a vacuum generator 42 and a vacuum switch 43. The negative pressure generating device 40 is connected to the suction heads 11.
[0016] The valve spring seat supply apparatus 10 mounted, for example, on a transfer machine (not shown) such as a robot arm which is movable between a supply position where the valve stem seals 1 and, the valve spring seats 2 are supplied and an assembling position where the valve stem seals I and the valve spring seats 2 are assembled to the cylinder head. The valve stem seals 1 and the valve spring seats 2 sucked and held at the supply position are moved onto the cylinder head and are assembled to a valve guide 3.
[0017] As shown in Figs. 3 and 4, each of the suction heads 11 includes the main shaft 20 and a shroud 21. The shroud 21 is fitted with an outer surface of a leading end side portion of the main shaft 20. The main shaft 20 and shroud 21 are concentrically arranged on the same axis. Between the main shaft 20 and shroud 21, a suction flow passage 30 is formed.
The suction flow passage 30 has a circular section.
[0018] The main shaft 20 includes a large diameter portion 24 and a small diameter portion 25. The large diameter portion 24 having a slightly larger diameter is disposed on a leading end side of the main shaft 20. On a leading end of the main shaft 20, a suction surface 23 for sucking and holding the valve spring seats 2 is provided. The small diameter portion 25 is disposed on the opposite side to the suction surface 23. In a radially central portion of the leading end of the large diameter portion 24, a circular recessed portion 26 is formed. From a top surface 26a of the recessed portion 26, a center pin 27 projects downwardly (toward the suction surface 23).
[0019] The recessed portion 26 is a stepped blind hole which is opened downwardly (toward the suction surface 23). The recessed portion 26 has a corresponding shape with an upper portion of the valve stem seal 1 and has an inside diameter slightly larger than an outside diameter of the upper portion of the valve stem seal 1. The center pin 27 is a pin which has an outside diameter slightly smaller than an inside diameter of a hole la of the valve stem seal 1. A leading end side of the center pin 27 is tapered. Due to this structure, the outer peripheral surface of the upper portion of the valve stem seal 1 can be fitted into the recessed portion 26 and the center pin 27 can be inserted into the hole la, whereby the valve stem seal 1 can be held by the main shaft 20.
[0020] S An axial hole 28 as a hollow portion is formed in the main shaft 20. The axial hole 28 is separated from the recessed portion 26 and extends in an axial direction of the inside diameter up to an end portion of the main shaft 20 which is opposite to the suction surface 23. The axial holes 28 of the respective main shafts 20 are connected to the negative pressure generating device 40 through the joints 18 respectively fixed to the end portion of the main shaft 20 at the opposite side to the suction surface 23 and air tubes 17 respectively connected to their associated joints 18 (see Fig. 1).
[0021] On an outer peripheral surface of the large diameter portion 24 of the main shaft 20, a clearance portion 31 is formed. When the shroud 21 is fitted with the outer surface of the main shaft 20, the clearance portion 31 is used to form a suction flow passage 30 having a circular section between an inner peripheral surface 29 of the shroud 21 and the outer peripheral surface of the main shaft 20. On a leading end of the clearance portion 31, a plurality of projection portions 32 are formed. Theprojectionportions 32 respectively project from the clearance portion 31 in a radial direction. The projection portions 32 are spaced from each other in a peripheral direction of the main shaft 20. A section area of the suction flow passage 30 at the suction surface 23 is narrowed by the projection portions 32. The clearance portion 31 and the axial hole 28 are allowed to communicate with each other through a plurality of radial holes 33.
[0022] In the outer peripheral surface of the large diameter portion 24 of the main shaft 20, an 0 ring groove 34 is formed.
The 0 ring groove 34 is formed in an upper side (on the opposite side to the suction surface 23) of the radial holes 33. The large diameter portion 24 of the main shaft 20 and the shroud 21 are sealed against each other by an 0 ring 35 mounted in the 0 ring groove 34.
[0023] The shroud 21 is a tubular member which has substantially the same length as the large diameter portion 24 of the main shaft 20 and includes an enlarged diameter hole 36 formed in a leading end portion of the shroud 21 (on the side of the suction surface 23). An inside diameter of the enlarged diameter hole 36 is set substantially the same as a diameter of a virtual circlewhich connects together outerperipheries of the plurality of projection portions 32. The shroud 21, when it is fitted with the outer surface of the large diameter portion 24 of the main shaft 20, defines the suction flow passage 30 having a circular section (which is perpendicular to the axial direction) which is defined by the clearance portion 31 and -10 -an inner peripheral surface 29 of the shroud 21. When the plurality of projection portions 32 are respectively fitted with the inner peripheral surface of the enlarged diameter hole 36, the suction flow passage 30 in the suction surface 23 of the suction heads 11 is formed into a plurality of arc shapes which are separated from each other in a peripheral direction of the shroud 21, thereby narrowing the section area of the suction flow passage 30 at the suction surface 23.
In the exemplary embodiment, in order to form the clearance portion 311 the outer peripheral surface of the large diameter portion 24 is set smaller in diameter than a portion where the 0 ring groove 34 is formed. However, instead of forming the clearance portion 31 in the main shaft 20, the clearance portion 31 may be provided by enlarging the inner diameter of the inner peripheral surface 29 of the shroud 21 to thereby form the clearance portion 31 on the inner peripheral surface of the shroud 21.
Further, in the exemplary embodiment, the plurality of projection portions 32 are formed on the main shaft 20 so as to project from the outer peripheral surface of the main shaft 20 toward the inner peripheral surface of the shroud 21 in the radial direction. However, thepluralityof projection portions 32 may be formed on the shroud 21 so as to project from the inner peripheral surface of the shroud 21 toward the outer peripheral surface of the main shaft 20 in the radial direction.
-11 -[0024] Next, description will be given below of an operation of the exemplary embodiment having the above structure. As shown in Fig. 5, the valve spring seat supply apparatus 10 according to the exemplary embodiment can operate in such a manner that, in the supply position (not shown) for the valve stem seals 1 and the valve spring seats 2, the respective suction heads 11 hold the valve stem seals 1 and valve spring seats 2 coaxially with each other. That is, as for the valve stem seal 1, the outer peripheral surface of the upper portion of the valve stem seal 1 is fitted with the recessed portion 26 and the center pin 27 is inserted into the hole la of the valve stem seal 1. Thus, the valve stem seals 1 can be held by the respective suction heads 11.
[0025] As for the valve spring seats 2,, the valve spring seats 2 can be held by the respective suction surfaces 23, when the suction surfaces 23 of the respective suction heads 11 come into contact with the flange portions 2a of the valve spring seats 2 in a condition that the air within the suction flow passages 30 is sucked through the axial holes 28 and radial holes 33 by operating the negative pressure generating device 40. In this case, since the section area of each of the suction flow passages 30 at the suction surface 32 is narrowed by the plurality of projection portions 32, the suction force in the suction surface 23 is consequently enhanced, thereby being -12 -able to surely suck the valve spring seat 2. Also, the outer peripheral surface 2b of the valve spring seat 2 is fitted with the inner surface of the recessed portion 26, whereby the suction head 11 and valve spring seat 2 can be centered.
[0026] Next, the valve spring seat supply apparatus 10, which is structured such that the respective suction heads 11 hold the valve stem seals I and valve spring seats 2 coaxially with each other, moves by the transfer machine to a given position on the valve guides 3 of the cylinder head, which serves as the assembling position of the valve stem seals 1 and valve spring seats 2. Then, when the apparatus 10 is moved downwardly, the valve guides 3 can be penetrated through the respective valve spring seats 2 and the valve stem seals 1 can be fitted with upper end portions of the respective valve guide 3, whereby they can be assembled to the respective valve guides 3.
[0027] As has been described heretofore, the valve spring seat supply apparatus 10 of the exemplary embodiment is provided with the plurality of suction heads 11 each including the shroud 21 and main shaft 20 coaxially disposed on the same axis to form the circular suction flow passage 30, and the negative pressure generating device 40 for sucking the air existing within the suction flow passage 30. According to the apparatus 10, since, on the suction surface 23 of the main shaft 20 for sucking and holding the valve spring seat 2, there are provided -13 -the projection portions 32 which can narrow the section area of the suction flow passage 30, the suction force for sucking the valve spring seat 2 is enhanced, which makes it possible to surely suck the valve spring seat 2. In addition, due to this, thevalvespringseatsupplyapparatus 10 canbe efficiently operated and thus a manufacturing cost can be reduced.
[0028] Moreover, themain shaft 20 includes the recessedportion 26 and the axial hole 28. The recessed portion 26 is formed in the leading end portion thereof on the side of the suction surface 23, and the recessed portion 26 is capable of holding the valve stem seal 1. The axial hole 28 is separated from the recessed portion, extends in the axial direction of the main shaft 20, and communicates with the circular suction flow passage 30. Due to this structure, the valve stem seal 1 can be fitted into and held by the recessed portion 26 of the main shaft 21 and also, while sucking the air in the circular suction flow passage 30, the valve spring seat 2 can be sucked to and held by the suction surface 23 of the suction flow passage 30. Owing to this, the valve stem seal 1 and valve spring seat 2 can be simultaneously supplied to the valve guide 3 of the cylinder head, whereby they can be assembled to the valve guide 3 with high precision and with high efficiency.
Furthermore, since the air in the circular suction flow passage 30 flows through the axial hole 28, the apparatus 10 can be easily communicatedwith the negativepressure generatingdevice -14 -without increasing the number of composing parts thereof.
[00291 In accordance with the embodiments of the invention, in the valve spring seat supply apparatus 10 for holding the valve spring seat and for supplying the valve spring seat to the valve guide provided in the cylinder head of the engine, the apparatus 10 may include: the main shaft 20; the shroud 21 concentrically disposed with the main shaft 20; the circular suction flow passage 30 formed between the main shaft 20 and the shroud 21; the suction surface 23 provided on the leading end of the suction flow passage 30 and adapted to suck and hold thevalve springseat; and theprojectionportion32 provided between the outer peripheral surface of the main shaft 20 and the inner peripheral surface of the shroud 21. The section area of the suction flow passage 30 at the suction surface 23 is narrowed by the projection portion 32. The apparatus may further include the negative pressure generating device adapted to suck an air in the suction flow passage 30.
The projection portions 32 mayproject from the outer peripheral surface of the main shaft 20 toward the inner peripheral surface of the shroud 21 in the radial direction, or may project from the inner peripheral surface of the shroud 21 toward the outer peripheral surface of the main shaft 20 in the radial direction.
[0030] According to these configurations, using a simple mechanism, the sucking force of the suction tool for sucking -15 -the valve spring seat can be enhanced, whereby the valve spring seat can be surely sucked. Also, thanks to this, troubles caused by poor suction can be eliminated, and the valve spring seat supply apparatus can be efficiently operated and thus S the manufacturing cost can be reduced.
[0031] In the above structure, the main shaft 20 may include: the recessed portion 26 formed in the end side of the main shaft 20 on the side of the suction surface 23 and adapted to hold a valve stem seal; and the hollow portion 28 separated from the recessed portion 26 and extending in the axial direction of the main shaft 20 to communicate with the suction flow passage 30.
[0032] According to this configuration, the valve stem seal can be fitted into and held by the recessed portion of the main shaft and the air in the circular suction flow passage can be sucked through the hollow portion to thereby suck the valve spring seat to the suction surface of the suction flow passage. Thanks to this, the valve stem seal and valve spring seat can be simultaneously supplied to the valve guide of the cylinder head, whereby they can be assembled with high precision and with high efficiency. Also, since the air in the circular suction flow passage flows through the hollow portion, the valve spring seat supply apparatus can be guided easily without increasing the number of composing parts thereof.
-16 -[0033)
While description has been made in connection with
a specific exemplary embodiment and modified examples thereof, it will be obvious to those skilled in the art that various changes and modifications may be made therein without departing from the present invention. It is aimed, therefore, to cover all such changes and modifications falling within the true scope of the present invention as definedby the appended claims.
ilDescription of Reference Numerals and Signs)
1: Valve stem seal 2: Valve spring seat 3: Valve guide 10: Valve spring seat supply apparatus 20: Main shaft 21: Shroud 23: Suction surface 26: Recessed portion 28: Axial hole (hollow portion) 30: Suction flow passage 32: Projection portion 40: Negative pressure generating device -17 -

Claims (5)

  1. Claims 1. A valve spring seat supply apparatus (10), for holding a valve spring seat and for supplying the valve spring seat to a valve guide provided in a cylinder head of an engine, S the apparatus (10) comprising: a main shaft (20); a shroud (21) concentrically disposed with the main shaft (20); a suction flow passage (30) formed between the main shaft (20) and the shroud (21) and having a circular section; a suction surface (23) provided on a leading end of the suction flow passage (30) and adapted to suck and hold the valve spring seat; and a projection portion (32) provided between an outer peripheral surface of the main shaft (20) and an inner peripheral surface of the shroud (21), wherein a section area of the suction flow passage (30) at the suction surface (23) is narrowed by the projection portion (32).
  2. 2. The apparatus according to claim 1, further comprising: a negative pressure generating device (40) adapted to suck an air in the suction flow passage (30).
  3. 3. The apparatus according to claim 1 or 2, wherein the main shaft (20) includes: a recessed portion (26) formed in an end side of the -18 -main shaft (20) onasideof the suction surface (23) andadapted to hold a valve stem seal; and ahollowportion (28) separated fromtherecessedportion (26) and extending in an axial direction of the main shaft (20) to communicate with the suction flow passage (30)
  4. 4. The apparatus according to any one of claims 1 to 3, wherein the projection portion (32) projects from the outer peripheral surface of the main shaft (20) toward the inner peripheral surface of the shroud (21) in a radial direction, 5. The apparatus according to any one of claims 1 to 3, wherein the projection portion (32) projects from the inner peripheral surface of the shroud (21) towardtheouterperipheral surface of the main shaft (20) in a radial direction.-19 -Amendments to the claims have been made as follows: Claims 1. A valve spring seat supply apparatus (10), for holding a valve spring seat and a valve stem seal and for supplying the valve spring seat and the valve stem seal to a valve guide provided in a cylinder head of an engine, the apparatus (10) comprising: a main shaft (20); a shroud (21) concentrically disposed with the main shaft (20); a suction flow passage (30) formed between and defined by an outer peripheral surface of the main shaft (20) and an inner peripheral surface of the shroud (21) and having a circular section; a suction surface (23) provided on a leading end of the suction flow passage (30) and adapted to suck and hold the valve spring seat; and a projection portion (32) provided between an outer peripheral surface of the main shaft (20) and an inner peripheral surface of the shroud (21), wherein a section area of the suction flow passage (30) at the suction surface (23) is narrowed by the projection portion (32) *fl IllI2. The apparatus according to claim 1, further comprising: 1:dd1 a negative pressure generating device (40) adapted ::::;1 25 to suck air in the suction flow passage (30) 3. The apparatus according to claim 1 or 2, wherein the main shaft (20) includes: a recessed portion (26) formed in an end side of the main shaft (20) on a side of thesuction surface (23) and adapted to hold a valve stem seal; and ahollowportion (28) separatedfromtherecessedportion (26) and extending in an axial direction of the main shaft (20) to communicate with the suction flow passage (30) 4. The apparatus according to any one of claims 1 to 3, wherein the projection portion (32) projects from the outer peripheral surface of the main shaft (20) toward the inner peripheral surface of the shroud (21) in a radial direction.
  5. 5. The apparatus according to any one of claims 1 to 3, wherein the projection portion (32) projects from the inner peripheral surfaceof the shroud (21) toward theouterperipheral surface of the main shaft (20) in a radial direction.Ssee... * .Ieels.. * S C * * 0I * **S sense * I ccC CI I Cl I. S * I * Sq
GB1106308.8A 2011-04-13 2011-04-13 Valve spring seat supply apparatus Expired - Fee Related GB2489973B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1106308.8A GB2489973B (en) 2011-04-13 2011-04-13 Valve spring seat supply apparatus

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Application Number Priority Date Filing Date Title
GB1106308.8A GB2489973B (en) 2011-04-13 2011-04-13 Valve spring seat supply apparatus

Publications (3)

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GB201106308D0 GB201106308D0 (en) 2011-05-25
GB2489973A true GB2489973A (en) 2012-10-17
GB2489973B GB2489973B (en) 2013-06-05

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106181293A (en) * 2016-08-30 2016-12-07 吴中区横泾嘉运模具厂 The iron core spring discharging unit of core assembly assemble mechanism
CN107309634A (en) * 2017-05-24 2017-11-03 苏州博众精工科技有限公司 Spring spinning machine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1574281A2 (en) * 2004-03-12 2005-09-14 Johann A. Krause Maschinenfabrik GmbH Method and device for automatically assembling valve drive parts

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1574281A2 (en) * 2004-03-12 2005-09-14 Johann A. Krause Maschinenfabrik GmbH Method and device for automatically assembling valve drive parts

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106181293A (en) * 2016-08-30 2016-12-07 吴中区横泾嘉运模具厂 The iron core spring discharging unit of core assembly assemble mechanism
CN106181293B (en) * 2016-08-30 2018-06-26 乐清市华田电力科技有限公司 The iron core spring discharging unit of core assembly assemble mechanism
CN107309634A (en) * 2017-05-24 2017-11-03 苏州博众精工科技有限公司 Spring spinning machine

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GB2489973B (en) 2013-06-05

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