摘要:
A cast mold for plastic molding, made of a nodular graphite cast iron comprising spheroidal graphite particles. The mold includes a peripheral portion defining a molding surface which contacts a plastic material to be molded. At least the peripheral portion of the mold has a particle size distribution of spheroidal graphite in which not less than 90% of the graphite particles are not greater than 10 microns, and not less than 50% of the graphite particles are not greater than 6 microns. Preferably, the nodular graphite cast iron consists by weight of 2.5-3.8% of carbon, 2.0-3.0% of silicon, not more than 0.8% of manganese, 2.0-5.0% of nickel, 0.2-1.0% of molybdenum, and the balance being iron, spheroidizer and impurities.
摘要:
An imaging device to which a support can be attached includes a support attachment unit and a support body unit. The support attachment unit includes a first threaded hole configured to be attached to the support, and an exposure face formed around the entrance of the first threaded hole. The support body unit includes a housing having an opening configured to expose the exposure face and an outer surface formed around the opening, and movably supports the support attachment unit. The support attachment unit is disposed at a first position when the support is not attached, and is disposed at a second position when the support is attached. The exposure face is disposed more to the inside of the housing than the outer surface when the support attachment unit is disposed at the first position.
摘要:
According to one embodiment, a secondary battery device includes a first assembled battery including a plurality of secondary battery cells, a second assembled battery including a plurality of secondary battery cells and connected in series to a low-potential terminal of the first assembled battery, a disconnecting module capable of mechanically switching connection between the first assembled battery and the second assembled battery, a voltage measurement circuit configured to measure voltages of the plurality of secondary battery cells of the second assembled battery, a first power source wiring connected between a high-potential terminal of the second assembled battery and the voltage measurement circuit, a second power source wiring connected between a low-potential terminal of the second assembled battery and the voltage measurement circuit, and a filter connected between the first power source wiring and the second power source wiring.
摘要:
A linear motor comprising a mover part including; an armature module having an I shaped magnetic iron core and an armature winding of one kind wound on the periphery of the I shaped magnetic iron core through an insulating material. A non-magnetic material holder on which a plurality of armature modules are arranged in a stroke direction is provided. A base upper plate and a base lower plate are provided for attaching the non-magnetic material holder in upper and lower parts respectively. A stator part includes a plurality of field permanent magnets opposed to the I shaped magnetic iron cores through magnetic spaces and field yokes for supporting the field permanent magnets. The non-magnetic material holder has at both end parts thereof through holes for inserting bolts corresponding to the forms and the arranging pitches of the I shaped magnetic iron cores.
摘要:
A lithium grease composition which can be sealed in a small motor bearing to reduce noise, composed of 5-20% by weight of a thickener and 95-80% by weight of a base oil, wherein said grease composition adopts lithium soap as the thickener, which is synthesized from lithium hydroxide and a higher fatty acid with 10 to 20 carbon atoms and/or a higher hydroxyfatty acid with one or more hydroxyl groups and 10 or more carbon atoms, and the base oil includes, as a main component, a polymer ester oil (A) in which 8 or more ester groups are arranged in a comb tooth form on one side of chain molecules constituted by eight or more carbon atoms which is expressed by general formula 1: (In the formula, each of R1, R2, R3 and R4 is an alkyl group, where x is an integer and x≧2, and y is an integer and y≧2.) and the base oil (40 C) has a viscosity of 25 to 80 mm2/s.
摘要:
A moving magnet type linear actuator long in service life having no effect on a linear guide even in the case of performing a highly-frequent acceleration/deceleration operation is provided. In a moving magnet type linear actuator comprising a stator unit including a stator base, a magnetic core and an armature unit, and a moving unit including a field permanent magnet arranged so as to face the magnetic core via a magnetic first gap and a magnet holder of nonmagnetic material movably disposed on the stator base while holding the field permanent magnet, and a magnetic back yoke is arranged at an anti-armature side of the field permanent magnet via a magnetic second gap from the field permanent magnet, the magnetic second gap is set to be larger than the magnetic first gap.
摘要:
A vehicle cabin lighting apparatus includes a monitor 1 mounted to a ceiling of a vehicle cabin, a monitor folding-or-unfolding detecting means 2 for detecting whether the monitor is placed in a folded or unfolded state, and a monitor control means 3 for determining whether the monitor is placed in a video display mode or lighting mode based on a detection output of the monitor folding-or-unfolding detecting means, for controlling the operation of the monitor according to a result of the determination, and for applying, as illumination light, light emitted out of the monitor to the vehicle cabin when the monitor is placed in the lighting mode.
摘要:
A permanent magnet synchronous linear motor comprising a field yoke (1) having a plurality of permanent magnets (2) the polarity of which is alternated and which are arranged linearly and an armature (3) facing the array of the permanent magnets (2) through a magnetic air gap, wherein the armature (3) comprises an armature core (4) having main teeth (4b) and slots (4a), an armature winding (5) wound in the slots 4a of the armature core (4), and auxiliary teeth (6) provided at both the ends of the armature core (4). The distance &tgr;p between the centers of the auxiliary teeth (6) and the pitch &tgr;m of the field poles satisfy a relation &tgr;p=(2n−1)×&tgr;m/2 (n is a positive integer) and the length O of the auxiliary teeth (6) is in a relation of O
摘要:
A linear motor excellent in insulation between armature coils, easy to assemble, very small in thrust ripple, comprising a secondary side supporter attached with a secondary side consisting of a plurality of magnetic field poles, and an armature element supporter facing the secondary side via a clearance and provided with an armature element (4) having a plurality of concentrate-wound armature coils (6), the secondary side and the armature element (4) being disposed facing each other and in parallel in the advancing direction, wherein field poles in the secondary side are disposed in the advancing direction of a mover with adjacent poles being unlike every Pm pitches, and a plurality of armature coils (6) are disposed in an array in the advancing direction of the mover every Pc pitches, the coil pitch Pc=5/3×Pm.
摘要:
The invention relates to a linear motor which is provided with a row of permanent magnets 6a, 6b, 6c, . . . for a field system, and an armature 2 facing the same via a magnetized space in an orthogonal direction thereto, wherein the armature core 3 has a winding accommodation groove 3a formed at both sides of armature iron plates produced by punching out oriented electromagnetic steel plate so as to become rectangular, and convex and concave engagement portions 3b and 3c, the armature iron plates are laminated to constitute one core block, and at the same time, the lengthwise direction, orthogonal to the permanent magnet row, in the respective core blocks is made the same as the rolling direction of electromagnetic steel plates. Thereby, since the magnetic flux of the armature winding 4 flows along the rolling direction of the core blocks, the magnetic flux density can be increased, and the peak thrust can be also increased.