JP4880659B2 - Active anti-vibration support device - Google Patents

Description

  The present invention relates to an active vibration isolation support device that supports a vehicle engine, and more particularly to an active vibration isolation support device that employs a bobbinless coil in which a coil is wound without using a bobbin.

  An active vibration isolating support device that supports the engine with respect to the vehicle body and applies a current according to the vibration state of the engine to the coil to drive the actuator to extend and contract to suppress transmission of vibration from the engine to the vehicle body. For example, it is disclosed in Patent Document 1. The active vibration isolating support device disclosed in Patent Document 1 employs a bobbinless coil, and a technique for winding the coil accurately without reducing the number of parts and man-hours is disclosed. Has been.

By the way, the active vibration isolating support device adopting this bobbinless coil holds the coil so as to be sandwiched between a pair of guide members disposed opposite to both sides of the coil.
Specifically, a plurality of engaging pieces extending in the radial direction from the peripheral edge of one guide member are provided at equal intervals in the circumferential direction, and the engaging pieces are similarly provided on the other guide member, and a pair of opposing pieces is provided. The guide members are fixed by winding a wire around the engaging piece.
International Publication No. 2006/074464 (FIGS. 3 to 6)

However, in the above-described conventional fixing method of the guide member, the guide member needs to be designed larger than the outer diameter of the coil as a condition for winding the engagement pieces. Furthermore, the outer diameter of the coil has a large fluctuation range (variation) depending on the tension of the conducting wire applied at the time of winding and other manufacturing conditions. Therefore, a design margin for always satisfying the above conditions is required. It is necessary to provide it.
As a result, there is a problem in that the active vibration isolating support device is increased in size by the required margin for setting the outer diameter of the guide member larger while ensuring sufficient margin. .

  It is an object of the present invention to solve the above-described problems, and to provide an active vibration-proof support device that can be designed to reduce the above-described margin and is further downsized.

In order to solve the above-described problems, the present invention provides an active vibration-proof support device that supports an engine and suppresses vibration transmitted from the engine to the vehicle body by a telescopic motion. A coil formed by winding, and a pair of guide members that are disposed opposite to each other at a position sandwiching the coil and that hold the coil by locking a strand to a notch provided on an outer peripheral edge, Is inclined with respect to the outer peripheral tangent of the coil and has a hypotenuse on which the strand comes into contact.
In addition, the said strand may be a part of said conducting wire which comprises the said coil.

  According to the present invention, even when the outer diameter of the coil varies greatly due to manufacturing variations, the strand (conductive wire) is locked to the notch at an arbitrary position along the oblique side. That is, the length of the radial component of the notch formed in the guide member acts as a margin for fluctuations in the outer diameter of the coil. Moreover, since the part of the strand (conductive wire) spanned between the opposing guide members contacts the side peripheral surface of the coil, the holding performance of the coil is further improved.

  According to the present invention, it is possible to design a small estimate of margin margin considering the fluctuation of the outer diameter of the wound coil, and further improve the holding performance of the coil, thereby reducing the size of the active vibration isolating support device. Provided.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the active vibration isolating support device M has a substantially axisymmetric structure with respect to the axis L, and has a substantially cylindrical upper housing 11 and a substantially cylindrical shape disposed below the upper housing 11. Lower housing 12, a substantially cup-shaped actuator case 13 accommodated in the lower housing 12 and having an open upper surface, a diaphragm 22 connected to the upper side of the upper housing 11, and an annular second housing housed in the upper housing 11. A first elastic body support ring 14, a first elastic body 19 connected to the upper side of the first elastic body support ring 14, an annular second elastic body support ring 15 accommodated in the actuator case 13, and a second elastic body support A second elastic body 27 connected to the inner peripheral side of the ring 15, and a drive housed in the actuator case 13 and disposed below the second elastic body support ring 15 and the second elastic body 27. And a unit (actuator) 41 and the like.
The active anti-vibration support device M configured as described above supports the engine and suppresses vibration transmitted from the engine to the vehicle body by the periodic expansion and contraction movement of the drive unit 41.

  Between the flange portion 11a at the lower end of the upper housing 11 and the flange portion 12a at the upper end of the lower housing 12, the flange portion 13a on the outer periphery of the actuator case 13, the outer periphery portion 14a of the first elastic body support ring 14, and the actuator case The upper cross section of the second elastic support ring 15 having an annular cross section disposed on the upper side of 13 and having a substantially U shape and having upper and lower outer peripheries is overlapped and joined by caulking. At this time, an annular first floating rubber 16 is interposed between the flange portion 12a and the flange portion 13a, and an annular shape is formed between the upper surface of the flange portion 13a and the lower surface of the upper surface outer peripheral portion 15a of the second elastic body support ring 15. By interposing the second floating rubber 17, the actuator case 13 is floatingly supported so as to be movable relative to the upper housing 11 and the lower housing 12 in the vertical direction.

The first elastic body support ring 14 and the first elastic body support boss 18 disposed in a recess provided on the upper surface side of the first elastic body 19 are a first elastic body 19 formed of a thick rubber. Are joined by vulcanization adhesion at the lower and upper ends. Further, a diaphragm support boss 20 is fixed to the upper surface of the first elastic body support boss 18 with bolts 21, and the outer peripheral portion of the diaphragm 22 joined to the diaphragm support boss 20 by vulcanization bonding is formed on the upper housing. 11 is bonded by vulcanization adhesion.
An engine mounting portion (operation point) 20a is integrally formed on the upper surface of the diaphragm support boss 20 and is fixed to an engine (not shown). In addition, the vehicle body attachment portion 12b at the lower end of the lower housing 12 is fixed to a vehicle body frame (not shown).

A flange portion 23 a at the lower end of the stopper member 23 is coupled to the flange portion 11 b at the upper end of the upper housing 11 by a bolt 24 and a nut 25. An engine mounting portion 20a projecting from the upper surface of the 20 faces the abutable surface.
With such a structure, when a large load is input from the engine to the active vibration isolating support device M, the engine mounting portion 20a abuts against the stopper rubber 26, thereby suppressing excessive displacement of the engine.

  The outer peripheral portion of the second elastic body 27 formed of a film-like rubber is joined to the inner peripheral surface of the second elastic body support ring 15 by vulcanization adhesion, and the second elastic body 27 is connected to the central portion of the second elastic body 27. The movable member 28 is joined by vulcanization adhesion so that the upper part is embedded.

  A disk-shaped partition wall member 29 is fixed between the upper surface of the second elastic body support ring 15 and the lower portion of the first elastic body support ring 14, and the first elastic body support ring 14, the first elastic body 19 and the first liquid chamber 30 defined by the partition member 29 and the second liquid chamber 31 defined by the partition member 29 and the second elastic body 27 are open to the center of the partition member 29. Communicate with each other via

The outer peripheral portion 27a of the second elastic body 27 is sandwiched between the lower surface of the second elastic body support ring 15 and a yoke 44 described later, and has a sealing function.
An annular communication path 32 is formed between the first elastic body support ring 14 and the upper housing 11. The communication path 32 communicates with the first liquid chamber 30 via the communication hole 33 and also communicates with the third liquid chamber 35 defined by the first elastic body 19 and the diaphragm 22 via the annular communication gap 34.

  The drive unit 41 includes a fixed core 42, a coil assembly 43, a yoke 44, a movable core 54, and the like mainly made of a metal or alloy having a high magnetic permeability.

The fixed core 42 has a substantially cylindrical shape having a flange portion of a receiving seat surface at a lower end portion, and the outer periphery of the cylindrical portion has a conical circumferential shape.
The movable core 54 has a substantially cylindrical shape, and its upper end protrudes in the inner circumferential direction to form a spring seat 54a. The inner circumference of the cylindrical portion below the spring seat 54a has a conical circumferential surface shape.

The coil assembly 43 is disposed between the fixed core 42 and the yoke 44, and includes a coil 46, a coil cover 47 that covers the side peripheral surface of the coil 46, and a pair of guide members 65 and 66 that cover the upper and lower surfaces of the coil 46. Is done.
The coil cover 47 is integrally formed with a connector 48 that extends through the openings formed in the lower housing 12 and the actuator case 13, and is connected to a power supply line for supplying power to the coil 46.

The yoke 44 has a cylindrical shape with a flange. A thin cylindrical bearing member 51 is slidably fitted in the inner peripheral surface of the cylindrical portion in the vertical direction. The upper end is bent in a flange shape radially inward, and the lower end is bent in a flange shape radially outward.
A set spring 52 is disposed in a compressed state between the lower end of the bearing member 51 and the lower end of the cylindrical portion of the yoke 44, and the bearing member 51 is urged downward and fixed by the elastic force of the set spring 52. It is pressed against the upper surface of the core 42.

  A substantially cylindrical movable core 54 is fitted to the inner peripheral surface of the bearing member 51 so as to be slidable in the vertical direction. Further, each of the fixed core 42 and the movable core 54 has a hollow center portion on the axis L, and is connected to the center portion (on the axis L) of the movable member 28 and extends substantially downward. A rod 55 is inserted. A nut 56 is fastened to the lower end portion of the rod 55. The nut 56 has a hollow portion whose upper end is open at the center, and the lower end side of the rod 55 is accommodated in the hollow portion. The upper end portion of the nut 56 has a slightly larger outer diameter than below, and is in contact with the movable core 54.

A set spring 58 in a compressed state is disposed between the upper surface of the movable core 54 and the lower surface of the movable member 28, and the movable core 54 is urged downward by the elastic force of the set spring 58. Is pressed against the upper surface of the nut 56 and fixed. In this state, the inner peripheral surface of the conical peripheral surface of the cylindrical portion of the movable core 54 and the outer peripheral surface of the conical peripheral surface of the fixed core 42 are opposed to each other via the conical peripheral surface gap g. ing.
The nut 56 is fastened to the rod 55 so that the position can be adjusted in the vertical direction, and the space is closed by a rubber cap 60.

The crank pulse sensor Sa detects a crank pulse that is output a plurality of times per rotation of a crankshaft (not shown) in the engine, that is, once for every fixed crank angle.
The electronic control unit 71 estimates the vibration state of the engine based on the crank pulse signal from the crank pulse sensor Sa and the TDC signal from the cam angle sensor Sb, and controls energization supplied to the drive unit 41.

  By the energization control from the electronic control unit 71, the coil 46 is excited, attracts the movable core 54, and moves the movable member 28 downward. As the movable member 28 moves, the second elastic body 27 defining the second liquid chamber 31 is deformed downward and the volume of the second liquid chamber 31 increases. Conversely, when the coil 46 is demagnetized, the second elastic body 27 is deformed upward by its own elasticity, the movable member 28 and the movable core 54 are raised, and the volume of the second liquid chamber 31 is reduced.

  Here, when the vehicle is running, engine shake vibration, which is low frequency vibration generated by resonance of the rigid body of the vehicle body and resonance of the engine system, occurs in the coupled system of the engine, the vehicle body, and the suspension of low frequency (for example, 7 to 20 Hz). Suppose that At this time, when the first elastic body 19 is deformed by the load input from the engine via the diaphragm support boss 20 and the first elastic body support boss 18 and the volume of the first liquid chamber 30 is changed, the communication path 32 is used. The liquid flows between the first liquid chamber 30 and the third liquid chamber 35 connected to each other.

In this state, when the volume of the first liquid chamber 30 is expanded / reduced, the volume of the third liquid chamber 35 is decreased / expanded accordingly, but the volume change of the third liquid chamber 35 is caused by the elastic deformation of the diaphragm 22. Absorbed. At this time, the shape and size of the communication path 32 and the spring constant of the first elastic body 19 are set so as to exhibit a low spring constant and a high damping force in the frequency region of the engine shake vibration. Vibration transmitted to the frame can be effectively reduced.
In the frequency region of the engine shake vibration, when the engine is in steady rotation, the drive unit 41 is kept in a non-operating state in which it is not driven.

  Vibration at a frequency higher than the engine shake vibration, that is, vibration during idling due to rotation of a crankshaft (not shown) of the engine, vibration during cylinder deactivation operation in which a part of the engine cylinder is deactivated to drive the engine When this occurs, the liquid in the communication path 32 connecting the first liquid chamber 30 and the third liquid chamber 35 becomes sticky and cannot exhibit the vibration isolation function. To demonstrate anti-vibration function.

By the way, idle vibration is a low frequency vibration of the floor, seat and steering wheel in the idling state, and bull vibration is a 4-cylinder engine, for example, 20-35 Hz, a 6-cylinder engine, for example, 30-50 Hz. Yes, Yusa Yusa vibration is 5-10H
This is caused by non-uniform combustion at z, and the engine roll vibration is the main factor.

Next, the coil assembly 43 will be described in detail with reference to FIG.
2 shows (a) a side view and (b) a top view of the coil assembly 43 with the coil cover 47 (see FIG. 1) removed.
The coil assembly 43 includes a coil 46 in which a conducting wire 61 energized by a driving current of a driving unit 41 (see FIG. 1) that performs expansion and contraction motion is wound around an axis L, a disc shape made of a synthetic resin, and the axis L And a pair of a first guide member 65 and a second guide member 66 that are disposed opposite to each other at a position sandwiching the coil 46 therebetween.
Except that one of these first guide member 65 and second guide member 66 (first guide member 65 in the figure) is provided with a groove 66a through which lead wires 61a and 61b from the conducting wire 61 at both ends are passed. The first guide member 65 and the second guide member 66 are hereinafter simply described as guide members 65 and 66 when it is not necessary to distinguish between them.

  On the outer peripheral edge of the guide members 65, 66, as shown in FIG. 2B, a plurality of pairs of notches 66b provided symmetrically with respect to the radial axis so as to form a constriction are formed at equal intervals (in the figure, 4) are provided. And a part of conducting wire 61 is latched by this pair of notch 66b, and the 1st guide member 65 and the 2nd guide member 66 which oppose so that the coil 46 may be hold | maintained are fixed.

As shown in FIGS. 3A and 3B in an enlarged manner, the notch 66b has a width that allows the conductor 61 to be loosely fitted, and is inclined with respect to the outer tangent of the coil 46 to be wound. is doing.
The relationship between the size of the radial component of the notch 66b and the outer diameter of the coil 46 is such that the outer periphery of the coil 46 to be wound is visible from the notch 66b when the guide members 65 and 66 are viewed from above. is doing. With such a relationship, even when the outer diameter of the coil 46 varies greatly due to manufacturing variations, the conductor 61 abuts on an arbitrary position along the oblique side of the notch 66b, and the notch 66b. That is, the length of the radial component of the notch 66b acts as a margin for fluctuations in the outer diameter of the wound coil.

Returning to FIG. 2A, the description will be continued.
The terminal portion of the conducting wire 61 is spanned between the notch 65 b of the first guide member 65 and the notch 66 b of the second guide member 66 facing each other, and all the notches 65 b and 66 b are arranged along the circumferential direction of the coil 46. Finally, the lead wire 61b is taken out from the groove 66a. Note that the starting end portion of the wound conducting wire 61 is also taken out as a lead wire 61a from the groove 66a.
Since the conducting wire 61 spanned between the guide members 65 and 66 is also in contact with the side peripheral surface of the coil 46, the holding performance of the coil 46 is further improved.

Next, the manufacturing procedure of the coil assembly 43 will be described with reference to FIG.
Here, the bobbin jig 62 used for manufacturing the coil assembly 43 includes a jig body 63 and a holding member 64, and the jig body 63 has a disk-like flange portion 63a and a cylindrical winding. The female screw 64a of the holding member 64 is screwed into a male screw 63c provided at the tip of the winding part 63b.

  First, the guide members 65 and 66 are guided to the winding portion 63 b of the jig main body 63 and then fastened by the holding member 64. In this state, the guide members 65 and 66 are opposed to each other in parallel with a predetermined interval. Then, the winding start side of the conducting wire 61 is taken as a lead wire 61a (see FIG. 2) through the groove 66a, and then the conducting wire 61 is wound around the axis of the winding portion 63b. At this time, the load applied to the conducting wire 61 is appropriately controlled and wound so that the holding function of the coil shape is enhanced.

Then, when the predetermined number of stages are wound around the winding portion 63b, the winding work of the conducting wire 61 is finished, and this time, the opposing guide members 65, 66 are utilized using the continuous conducting wire 61. Are biased toward each other.
First, the winding end side of the end of the conducting wire 61 is hung in the vertical direction after being hanged on the notch 65b (see FIG. 3) of the first guide member 65, and a pair of notches 66b of the opposing second guide member 66 are formed. Engage with the part. At this time, the portion of the conducting wire 61 laid in the vertical direction in FIG. 2 presses the side peripheral surface of the coil 46 in the direction of the central axis L. As described above, the pressing force of the conducting wire 61 stretched in the vertical direction cancels the pushing force from the other conducting wire 61 spanned at the position opposite to the central axis L, and acts to hold the coil 46. Be improved.

In this way, the conductor 61 is bridged in the vertical direction in order in the circumferential direction with respect to the notches 65b and 66b provided on the outer peripheral edges of the guide members 65 and 66, and finally passed through the groove 66a. Let it be a leader line 61b (see FIG. 2).
Thus, the coil 46 formed by winding the conducting wire 61 is stably held by the pair of opposing guide members 65 and 66.

Returning to FIG. 4, the description will be continued.
Next, the holding member 64 is removed from the jig main body 63, and the jig main body 63 is extracted from the assembly of the coil 46 and the guide members 65 and 66 circumscribing the winding portion 63b. A coil cover 47 made of synthetic resin is molded on the outer peripheral surface excluding the inner peripheral surface of the coil 46 and the outer surfaces of the guide members 65 and 66 to complete the coil assembly 43 (see FIG. 1). When the coil cover 47 is molded, the connector 48 is integrally formed there.

  Although the embodiments of the present invention have been described above, various design changes can be made without departing from the scope of the present invention.

For example, in the embodiment, the opposing guide member is restrained by using the terminal portion of the coil conductor, but a different wire other than the coil conductor may be used.
In addition, the order in which the coil conducting wire (or a simple wire) passes through the notch formed in the guide member is not limited to the illustrated mode, and the coil conducting wire (or a simple wire) is laid across the side peripheral surface of the coil 46. Then, it is only necessary that the guide members are urged in directions approaching each other.

It is a longitudinal cross-sectional view of the active vibration-proof support apparatus which concerns on embodiment of this invention. It is the (a) side view and (b) top view of the coil assembly applied to the active vibration isolating support device according to the embodiment. It is the elements on larger scale of the notch provided in the outer periphery of the guide member of FIG. 2, Comprising: (a) (b) shows the latching state of the notch by the strand when a coil outer diameter changes, respectively. Yes. It is a figure explaining the manufacturing process of a coil assembly.

Explanation of symbols

Reference Signs List 41 Drive Unit 42 Fixed Core 43 Coil Assembly 44 Yoke 46 Coil 47 Coil Cover 48 Connector 51 Bearing Member 54 Movable Core 61 Conductor (Wire)
61a, 61b Leader line 65 Guide member 65 First guide member (guide member)
66 Second guide member (guide member)
65b, 66b Notch 65c, 66c hypotenuse L axis M active vibration isolation support device

Claims (2)

In the active vibration isolating support device that supports the engine and suppresses vibration transmitted from the engine to the vehicle body by expansion and contraction,
A coil formed by winding a conducting wire for energizing the drive current of the telescopic movement;
A pair of guide members that are arranged opposite to each other at a position sandwiching the coil and hold the coil by locking a strand to a notch provided on the outer peripheral edge,
2. The active vibration isolating support device according to claim 1, wherein the notch is inclined with respect to the outer tangent of the coil and has a hypotenuse on which the element wire comes into contact.   The active vibration isolation support device according to claim 1, wherein the element wire is a part of the conductive wire forming the coil.

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