JP5778205B2 - Non-excitation actuated brake rotor - Google Patents

Description

  The present invention relates to a rotor (friction plate) used in a non-excitation actuated brake.

  As a rotor for non-excitation actuated electromagnetic brakes, the entire rotor body with a shaft fitting hole in the center is composed of a stainless steel core plate, and friction materials (lining members) are provided on both sides near the outer periphery of the core plate. Is pasted with an adhesive (conventional example 1), or a synthetic resin friction material is directly insert-molded on a stainless steel core plate having a shaft fitting hole in the center (conventional example 2). ) And a three-layer structure (conventional example 3) of a prepreg base material provided with a shaft fitting hole in the center and a friction material integrally formed on both surfaces of the prepreg base material (conventional example 3) are known ( For example, Patent Document 1).

JP 7-264807 A

  In the conventional example 1, since the entire portion from the central portion of the rotor body to the outermost periphery is constituted by a stainless steel core plate, the rotor is heavy and has a large inertia, and frictional material wears rapidly during idling. Become a thing.

  In the conventional example 2, as the core plate is made smaller in diameter, the rotor becomes lighter. However, since the outer periphery of the rotor is composed of only friction material, it is difficult to ensure sufficient strength and durability. The degree of freedom in selecting the material and type of friction material is limited. If a resin mold friction material is used as the friction material, the strength can be ensured, but the material economy becomes worse due to the large amount of resin mold friction material used.

  In the conventional example 3, the prepreg base material is used as a core plate and a metal core is not used, so that the rotor can be reduced in weight, but the strength and durability of the shaft fitting hole portion can be ensured. It will be difficult.

  The problem to be solved by the present invention is to ensure both sufficient strength and durability and light weight in a non-excitation actuated brake rotor.

  The non-excitation actuated brake rotor (10) according to the present invention is insert-molded on a metal core plate (12) having a shaft fitting hole (16) and an outer periphery of the core plate (12). It has the resin-made disk part (22) extended in radial direction outward from the outer periphery of a board (12), and the lining member (26) stuck on the board surface (22C) of the said disk part (22).

  According to this configuration, the rotor center side having the shaft fitting hole (16) and requiring high mechanical strength is constituted by the metal core plate (12), and has higher mechanical strength than the central portion. The disk portion (22) on the outer periphery of the rotor, which is a lining adhering portion that does not need to be made of resin, reduces the weight of the rotor body compared to the case where the entire rotor body (11) is made of metal. can do. Thereby, in the non-excitation actuated brake rotor (10), ensuring sufficient strength and durability and reducing the weight are compatible.

  In the non-excited operation type brake rotor (10) according to the present invention, preferably, the lining member (26) is adhered to the disk surface (22C) of the disk portion (22) with an adhesive, and the disk surface (22C). Is formed with at least one recess (22D) into which the adhesive enters.

  According to this configuration, the adhesive that has entered and hardened into the recess (22D) has the effect of increasing the peel resistance in the rotational direction of the lining member (26) relative to the board surface (22C).

  According to the non-excitation actuated brake rotor according to the present invention, the core plate provided with the shaft fitting hole is made of metal, and extends from the outer periphery of the core plate to the outside in the radial direction to which the lining member is attached. Since the part is made of a resin, ensuring both sufficient strength and durability and weight reduction are compatible.

The front view which shows one Embodiment of the rotor body of the rotor for non-excitation action | operation type brakes by this invention. FIG. 2 is a cross-sectional view of a non-excitation actuated brake rotor corresponding to an enlarged cross-sectional view along line II-II in FIG. 1. FIG. 3 is a partially enlarged perspective view of a non-excitation actuated brake rotor according to the present embodiment. (A) is sectional drawing which shows the brake fastening state of the non-excitation action | operation type brake incorporating the rotor by this embodiment, (B) is sectional drawing which similarly shows a brake release state.

  Hereinafter, an embodiment of a non-excitation actuated brake rotor according to the present invention will be described with reference to FIGS.

  A non-excitation actuated brake rotor (hereinafter referred to as a rotor) 10 has an annular core plate 12. The core plate 12 is made of metal such as stainless steel, and has a shaft fitting hole (center hole) 16 having a spline portion 14 formed on the inner peripheral surface at the center. A plurality of semicircular enlarged portions 18 are formed at equal intervals in the circumferential direction on the outer periphery of the core plate 12. A through hole 20 that penetrates the core plate 12 in the thickness direction is formed in each enlarged portion 18.

  On the outer periphery of the core plate 12, a disk portion 22 is provided integrally with the core plate 12 by injection molding. The disk portion 22 is made of a thermosetting hard resin such as phenol resin, and is formed in an annular shape on the outer periphery of the core plate 12 by an insert mold, and overlaps with the core plate 12 in the plate thickness direction (axial direction). The inner portion 22A and an annular outer portion 22B extending radially outward from the outer periphery of the core plate 12 are integrally provided.

  The inner ring portion 22 </ b> A is a coupling allowance for coupling the disk portion 22 to the core plate 12. The resin constituting the disk portion 22 is filled in each through hole 20 of the core plate 12 in the inner ring portion 22A. As a result, the coupling strength between the core plate 12 and the disk portion 22, particularly the engagement strength in the rotor rotation direction, is improved. Further, the outer peripheral edge of the core plate 12 has a concavo-convex shape by the enlarged portion 18, and the rotor rotation between the core plate 12 and the disc portion 22 is also performed by insert molding the disc portion 22 following this concavo-convex shape. The engagement strength in the direction is improved. By these things, the reliability that the disc part 22 does not peel in the rotor rotation direction with respect to the core plate 12 improves. This is an important matter for the rotor 10 for the non-excited operation brake.

  A lining member 26 is adhered to both the disk surfaces 22C of the outer ring portion 22B by an adhesive layer 24. The lining member 26 is made of a material having better friction characteristics than the resin constituting the disk portion 22. As a suitable material for the lining member 26, there is a resin mold friction material in which a glass fiber, a metal fiber, or a carbon fiber is blended with a thermosetting resin as a base material.

  In the present embodiment, the friction material such as the resin mold friction material may be used in an amount sufficient to form the lining member 26. Therefore, the friction of the disc portion 22 and the lining member 26 as a whole is integrally formed with the friction material. The amount of material used is small, and there is no increase in material economy. This becomes remarkable when the disk portion 22 is made of an inexpensive phenol resin.

  It is preferable with respect to adhesive compatibility that the base material of the lining member 26, the resin constituting the disk portion 22, and the adhesive constituting the adhesive layer 24 are made of the same kind of the same resin. For example, it is preferable that the base material of the lining member 26 and the disk portion 22 are made of a phenol resin, and the adhesive constituting the adhesive layer 24 is a phenol resin adhesive having a strong cohesive force and high polarity. . Thereby, high intensity | strength and reliability are obtained about sticking of the lining member 26 with respect to the board surface 22C by the adhesive bond layer 24. FIG.

  A plurality of depressions 22D are formed on the board surface 22C at equal intervals in the circumferential direction. The hollow portion 22D is formed at the same time as the injection molding of the disk portion 22, and has a depth of about 0.1 to 0.3 mm and has a circular shape with a diameter slightly smaller than the radial dimension of the surface 22C. doing.

  After the adhesive is applied to the board surface 22C, the lining member 26 is slightly moved in the circumferential direction with respect to the board surface 22C, so that the adhesive enters the recess 22D so as to collect excess adhesive. The adhesive cured in the recess 22D together with the adhesive of the adhesive layer 24 has an effect of increasing the peel resistance in the rotational direction of the lining member 26 with respect to the board surface 22C. Moreover, in the hollow part 22D, the adhesive strength of the lining member 26 with respect to the board surface 22C is improved by increasing the thickness of the adhesive layer as compared with other parts.

  As described above, in the rotor 10 of this embodiment, the rotor body 11 is configured by the core plate 12 and the disk portion 22 made of different materials. The rotor body 11 has a shaft fitting hole 16 (spline portion 14) and the rotor center side, which requires high mechanical strength, is constituted by a stainless steel core plate 12, and has higher mechanical strength than the central portion. Since the disk portion 22 on the outer periphery side of the rotor, which is a lining adhering portion that does not need to be made of resin, is made resin, the mass of the rotor body 11 is reduced to 1 / compared to the case where the entire rotor body 11 is made of stainless steel. It can be reduced to about 2. Thereby, in the rotor 10, ensuring sufficient intensity | strength and durability and weight reduction are compatible.

  By reducing the weight of the rotor body 11, the inertia of the rotor 10 is reduced, and the wear of the lining member 26 during idling is reduced. In particular, when the rotor 10 is used in a non-excited operation type brake in which the rotor 10 is placed vertically (vertically placed), wear of the lining member 26 during idling is reduced as compared with the conventional product, and the life of the rotor 10 is significantly improved. Further, since the wear of the lining member 26 is reduced, the generation of wear powder is reduced and the environmental performance is improved.

  The reduction in the inertia of the rotor 10 becomes remarkable when the outer peripheral side of the rotor body 11 is made of resin, that is, lighter.

  Since the resin constituting the disk portion 22 is a thermosetting resin such as a phenol resin, the electromagnetic coil portion in the use in the non-excited operation brake of the rotor 10 is further protected against frictional heat and environmental temperature. High thermal durability can be secured against high temperatures due to self-heating. In particular, the use of a phenol resin makes it possible to obtain excellent mechanical performance and thermal performance at low cost.

  In the electromagnetic brake, an unpleasant sound called “sounding noise” may be generated due to slight vibration generated in the rotor 10 during braking action. On the other hand, in this embodiment, since the disk part 22 which is a lining sticking part is comprised with the phenol resin whose Young's modulus is lower than a metal, the fine vibration at the time of a braking action is suppressed, and "sound noise" Is reduced.

  In this embodiment, since the disk part 22 is shape | molded by the outer periphery of the core board 12 by insert molding, the disk part 22 can be shape | molded with respect to the core board 12 with sufficient precision. As a result, the disk portion 22 and the lining member 26 can be thinned, and the thinning of the non-excitation actuating brake using the rotor 10 can be promoted.

  When a resin-made lining member is attached to the metal plate forming the core plate 12 with an adhesive, it is difficult to separate the metal plate and the lining member in the classification for each material type when the rotor is discarded. On the other hand, in this embodiment, the disk portion 22 is formed on the outer periphery of the core plate 12 by insert molding, and the lining member 26 is attached to the disk portion 22 with an adhesive. 12 and the disk part 22 can be separated relatively easily by breaking the annular inner part 22A of the disk part 22, so that the resin part and the core formed by the disk part 22 to which the lining member 26 is attached are formed. The metal parts formed by the plate 12 can be separated relatively easily.

  FIG. 4 shows one embodiment of a non-excitation actuated brake incorporating the rotor 10 described above.

  The electromagnetic brake includes an annular stator 50, a fixed plate 56 fixed to the stator 50 by bolts 54 with a collar member 52 sandwiched between one end face side of the stator 50, and between the stator 50 and the fixed plate 56. And a movable armature 58 arranged so as to be movable in the axial direction of the bolt 54. The movable armature 58 is prevented from rotating by being engaged with the collar member 52 by a recess 59 formed in the outer peripheral portion.

  A magnetic pole surface 50A formed by one end surface of the stator 50 faces a magnetic pole surface 58A formed by one end surface of the movable armature 58, and a friction surface 56A formed by one end surface of the fixed plate 56 forms the other end surface of the movable armature 58. It faces the friction surface 58B.

  An annular electromagnetic coil 60 having a magnetic pole surface 50A as a selective magnetic attraction surface is embedded in the stator 50. Between the stator 50 and the movable armature 58, a torque spring 62 is provided by a compression coil spring that urges the movable armature 58 away from the magnetic pole surface 50A, that is, toward the fixed plate 56 side.

  The rotor 10 is disposed between the fixed plate 56 and the movable armature 58 so as to be movable in the axial direction of the bolt 54. The surface of the lining member 26 on one side of the rotor 10 faces the friction surface 56A of the fixed plate 56, and the surface of the lining member 26 on the other side of the rotor 10 faces the friction surface 58B of the movable armature 58. A rotor hub member 64 is spline-engaged with the spline portion 14 of the rotor 10.

  When the electromagnetic coil 60 is not energized, the movable armature 58 is not magnetically attracted to the stator 50 side as shown in FIG. The magnetic pole surface 58A is separated from the magnetic pole surface 50A of the stator 50, and the rotor 10 is sandwiched between the friction surface 58B and the friction surface 56A. Thus, the surface of the lining member 26 on one side of the rotor 10 is frictionally engaged with the friction surface 56A of the fixed plate 56, and the surface of the lining member 26 on the other side of the rotor 10 is frictional surface 58B of the movable armature 58. Thus, a braking action state in which the rotor 10 cannot be rotated by the friction force, that is, a brake engagement state is obtained.

  When the electromagnetic coil 60 is energized, as shown in FIG. 4B, the movable armature 58 is magnetically attracted toward the stator 50, and the magnetic poles of the movable armature 58 are resisted against the spring force of the torque spring 62. The surface 58A is magnetically attracted to the magnetic pole surface 50A of the stator 50. As a result, the sandwiching of the rotor 10 by the fixed plate 56 and the movable armature 58 is released, and the brake 10 is in a brake release state in which the rotor 10 can freely rotate with respect to the fixed plate 56 and the movable armature 58.

  The rotation of the rotor 10 in the brake released state is called idling operation, and the wear of the lining member 26 caused by the rotation of the lining member 26 while contacting the fixed plate 56 or the movable armature 58 in the idling operation is idling wear. is called. This idling wear is significantly reduced by reducing the weight of the rotor body 11.

  Although the present invention has been described above with reference to preferred embodiments thereof, the present invention is not limited to such embodiments and can be deviated from the spirit of the present invention, as will be readily understood by those skilled in the art. It is possible to change appropriately within the range not to be. Further, it is possible to make appropriate selections without departing from the spirit of the present invention.

  For example, the hollow portion 22D is not essential, and when a gate mark at the time of injection molding of the disk portion 22 remains on the disk surface 22C on one side to which the lining member 26 is adhered, only the disk surface 22C on the opposite side is left. A recess 22D may be provided. Further, the rotor according to the present invention can be similarly applied to electromagnetic brakes and electromagnetic clutches other than the non-excitation operation type brake.

10 Non-excitation actuated brake rotor (rotor)
DESCRIPTION OF SYMBOLS 11 Rotor body 12 Core board 14 Spline part 16 Shaft fitting hole 22 Disk part 22C Board surface 22D Recessed part 24 Adhesive layer 26 Lining member 50 Stator 56 Fixed plate 58 Movable armature 60 Electromagnetic coil 62 Torque spring

Claims (2)

A metal core plate with a shaft fitting hole;
A resin-made disk portion that is insert-molded on the outer periphery of the core plate and extends radially outward from the outer periphery of the core plate;
A non-excitation actuated brake rotor having a lining member adhered to a disk surface of the disk portion.   2. The non-excitation actuated brake rotor according to claim 1, wherein the lining member is adhered to a disk surface of the disk portion with an adhesive, and at least one hollow portion into which the adhesive enters is formed on the disk surface.

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