JP2012197712A - Protective device of coupler of electronic component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a protective device of a coupler of an electronic component for easily installing a protective means of the coupler.SOLUTION: The protective device of the coupler of the electronic component protects the coupler 51 installed in the electronic component and a wire 52 derived from a base end part of the coupler 51. A plurality of projection strips 54 and grooves 55 turned in the axial length direction of a protective cap 53 are arranged on the inner periphery of the protective cap 53 of an elastic raw material to be put on the coupler 51, the protective cap 53 is frictionally fixed to the coupler 51 by the projection strips 54 brought into pressure contact with a peripheral surface of the coupler 51 by elastic restoring force of this protective cap 53 by putting the protective cap 53 of the elastic raw material on the coupler 51, and among the plurality of grooves 55, a predetermined groove 55 is formed as a wire inserting groove 60 swelling outside in the radial direction of the protective cap 53 more than the other grooves 55, and the wire 52 is inserted into this wire inserting groove 60.

Description

  TECHNICAL FIELD The present invention relates to a protection device for a coupler of an electronic component, and more particularly, it is easy to attach a protection means for a coupler, does not require a mounting portion for the protection means, and does not require a wire holding means in addition to the protection means. The present invention relates to a protection device for a coupler of an electronic component.

  Conventionally, as a protection device for a coupler of an electronic component, there is a device that protects a coupler attached to the electronic component and a wire led out from a base end portion of the coupler (see FIG. 3 of Patent Document 1).

In this electronic component coupler protection structure, the coupler and the wire are covered with a metal protective cover.
However, this engine has a problem because it uses a metal protective cover as a protection means for the coupler.

Japanese Patent Laying-Open No. 2005-320972 (see FIG. 3)

<Problem> Mounting of the protection means of the coupler is complicated.
Since a metal protective cover is used as the coupler protective means, it is necessary to attach the protective cover to the engine using a fastener such as a bolt, and it is complicated to attach the coupler protective means.

<Problem> An attachment for the protective means of the coupler is required near the sensor.
Since a metal protective cover is used as the coupler protection means, a mounting portion for the coupler protection means is required near the sensor.

<Problem> A wire holding means is required in addition to the coupler protecting means.
Since a metal protective cover is used as the coupler protection means, a wire holding means such as a clamp is required in addition to the coupler protection means.

  An object of the present invention is to provide a protection device for a coupler of an electronic component that can solve the above-described problems, that is, it is easy to attach a protection means for a coupler, and does not require a mounting portion for the protection means. Another object of the present invention is to provide a protection device for a coupler of an electronic component that does not require a wire holding means.

Invention specific matters of the invention according to claim 1 are as follows.
As illustrated in FIG. 2 (A) or FIG. 8 (A), an electronic component that protects a coupler (51) attached to the electronic component and a wire (52) led out from the base end of the coupler (51). In the coupler protection device,
As illustrated in FIGS. 2 (A) to (C) or FIGS. 8 (A) to (C), the protective cap (53) is placed on the inner periphery of the protective cap (53) made of an elastic material covering the coupler (51). A plurality of ridges (54) and grooves (55) directed in the axial direction are provided, and the ridges (54) and grooves (55) are alternately arranged in the circumferential direction of the protective cap (53) to provide a coupler ( 51) at an arbitrary position in the circumferential direction, the wire (52) oriented in the axial length direction is along the circumferential surface of the coupler (51), and the coupler (51) is covered with a protective cap (53) made of an elastic material, The protective cap (53) is frictionally fixed to the coupler (51) by the protrusion (54) pressed against the peripheral surface of the coupler (51) by the elastic restoring force of the protective cap (53), and the plurality of grooves (55) are formed. Among these, the predetermined groove (55) is a wire insertion groove (60) that bulges outward in the radial direction of the protective cap (53) from the other grooves (55), and the wire insertion groove (60) has a wire insertion groove (60). Ya (52) is inserted, the engine being characterized in that from the distal end opening of the wire insertion groove (60) (56) to be pulled out to the outside of the wire (55) the protective cap (53).

(Invention of Claim 1)
The invention according to claim 1 has the following effects.
<Effect> It is easy to attach the protection means of the coupler.
As illustrated in FIG. 2 (A) or FIG. 8 (A), the coupler (51) is covered with a protective cap (53) made of an elastic material, so that the coupler (51) is elastically restored by the elastic restoring force of the protective cap (53). Since the protective cap (53) is frictionally fixed to the coupler (51) by the ridge (54) pressed against the peripheral surface of the outer peripheral surface, a fastener such as a bolt is not necessary, and the protective cap (53) is a protective means for the coupler (51). ) Is easy to install.

<Effect> It is not necessary to provide a coupler protection means in the vicinity of the electronic component.
As illustrated in FIG. 2 (A) or FIG. 8 (A), the coupler (51) is covered with a protective cap (53) made of an elastic material, so that the coupler (51) is elastically restored by the elastic restoring force of the protective cap (53). Since the protective cap (53) is frictionally fixed to the coupler (51) by the protrusion (54) pressed against the peripheral surface of the connector, the mounting portion of the protective cap (53), which is a protective means of the coupler (51), is close to the electronic component. Do not need.

<Effect> No wire holding means is required in addition to the coupler protecting means.
As illustrated in FIG. 2 (A) or FIG. 8 (A), the wire (52) is inserted into the wire insertion groove (60), so that in addition to the protective cap (53) which is a protection means of the coupler (51). No means for holding the wire (55) is required.

<Effect> Even if the shape of the coupler changes, the same protective cap can be used.
As illustrated in FIG. 2A or FIG. 8A, since the protective cap 53 that covers the coupler 51 is an elastic material, even if the shape of the coupler 51 changes, the same protective cap 53 ).

<Effect> The water that has entered the protective cap is easily discharged from the tip opening through the groove.
As illustrated in FIG. 2 (B) or FIG. 8 (B), a plurality of protrusions oriented in the axial length direction of the protective cap (53) are provided on the inner periphery of the protective cap (53) made of an elastic material covering the coupler (51). Since the ridge (54) and the groove (55) are provided, and the protrusion (54) and the groove (55) are alternately arranged in the circumferential direction of the protective cap (53), it enters the protective cap (53). Water is easily drained from the tip opening (56) through the groove (55).

<Effect> Damage to the wire can be suppressed.
As illustrated in FIG. 2 (A) or FIG. 8 (A), among the plurality of grooves (55), a predetermined groove (55) is radially outside the protective cap (53) with respect to the other grooves (55). The wire insertion groove (60) that bulges out into the wire insertion groove (60), the wire (52) is inserted into the wire insertion groove (60), and the wire (52) is protected from the tip opening (56) of the wire insertion groove (60). 53) so that the wire (52) led out from the base end of the coupler (51) bends gently in the protective cap (53), thereby suppressing damage to the wire (52). be able to.

(Invention of Claim 2)
The invention according to claim 2 has the following effect in addition to the effect of the invention according to claim 1.
<Effect> The protective cap can be firmly fixed to the coupler.
As illustrated in FIG. 2 (A) (B) or FIG. 8 (A) (B), the wire insertion groove forming portion (61) in which the wire insertion groove (60) is formed in the peripheral wall portion of the protective cap (53). ) Is thicker than the other parts, so that even if there is a wire insertion groove (60) that bulges outward in the radial direction of the protective cap (53), the thickness of the wire insertion groove formation part (61) Thus, deformation of the entire protective cap (53) can be suppressed, and the protective cap (53) can be firmly fixed to the coupler (51).

(Invention of Claim 3)
The invention according to claim 3 has the following effect in addition to the effect of the invention according to claim 1 or claim 2.
<Effect> The protective cap can be firmly fixed to the coupler.
As illustrated in FIGS. 8A and 8B, a plurality of protrusions (54) are provided with retaining protrusions (62) protruding inward in the radial direction of the protective cap (53) on a part in the longitudinal direction. Since the protective cap (53) is retained from the coupler (51) by the retaining protrusion (62), the protective cap (53) can be firmly fixed to the coupler (51).

It is a front view of the timing transmission case used with the electronically controlled industrial engine provided with the protective device of the coupler of the electronic component which concerns on embodiment of this invention. 2A is a cross-sectional view taken along the line IIA-IIA in FIG. 1, FIG. 2B is a bottom view of the protective cap, and FIG. 2C is a view in the direction of arrow C in FIG. It is a figure explaining the nonmagnetic plate arrange | positioned in the timing transmission case of FIG. 4A and 4B are diagrams illustrating a rotor plate used in an electronically controlled industrial engine according to an embodiment of the present invention, FIG. 4A being a front view, and FIG. 4B being a cross-sectional view taken along line BB in FIG. It is. 1 is a front view of an electronically controlled industrial engine according to an embodiment of the present invention. It is a right view of the engine of FIG. It is a left view of the engine of FIG. FIG. 8 is a diagram for explaining a modified example of the protective cap. FIG. 8 (A) is a longitudinal sectional view of the protective cap, FIG. 8 (B) is a bottom view of the protective cap, and FIG. 8 (C) is FIG. It is a C direction arrow directional view.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 to FIG. 8 are diagrams for explaining an electronically controlled industrial engine provided with a protection device for a coupler of an electronic component according to an embodiment of the present invention. In this embodiment, a vertical four-cycle in-line four-cylinder water-cooled common rail industrial diesel engine will be described.

The outline of the engine according to the embodiment of the present invention is as follows.
As shown in FIG. 6, the cylinder head (24) is assembled to the upper part of the cylinder block (23), the head cover (25) is assembled to the upper part of the cylinder head (24), and the oil pan is installed to the lower part of the cylinder block (23). (26) is assembled. A timing transmission case (8) and a water pump (43) are assembled to the front part of the cylinder block (23), and an engine cooling fan (44) is attached to the front part of the water pump (43). A flywheel housing (7) is assembled to the rear part of the cylinder block (23), and the flywheel (6) is accommodated in the flywheel housing (7).

  As shown in FIG. 7, an intake manifold (28) is assembled on the left side of the cylinder head (24), a common rail (29) is arranged on the left side of the intake manifold (28), and a fuel supply is arranged on the left side of the cylinder block (23). A pump (30) is arranged. An injector (not shown) in the head cover (25) is connected to the common rail (29), and an electromagnetic valve of the injector is controlled to open and close by an ECU (engine control unit), and a predetermined amount of fuel is injected at a predetermined fuel injection timing. To be done. This fuel injection timing is set based on detection of the crank angle of the crankshaft (3) and cylinder discrimination.

As shown in FIG. 2 (A), the coupler (51) attached to the crank angle sensor (2) for detecting the crank angle and the wire (52) led out from the base end of the coupler (51) are: It is protected as follows.
As shown in FIG. 2 (B), a plurality of protrusions (54) and grooves (in the axial direction of the protective cap (53)) are formed on the inner periphery of the protective cap (53) made of an elastic material covering the coupler (51). 55), and the protrusions (54) and grooves (55) are alternately arranged in the circumferential direction of the protective cap (53), and as shown in FIG. At this position, the wire (52) directed in the axial length direction is placed along the peripheral surface of the coupler (51), and the protective cap (53) made of an elastic material is put on the coupler (51). The protective cap (53) is frictionally fixed to the coupler (51) with a protrusion (54) pressed against the peripheral surface of the coupler (51) by the elastic restoring force of the plurality of grooves (55), and a predetermined groove ( 55) is a wire insertion groove (60) that bulges radially outward of the protective cap (53) with respect to the other groove (55), and the wire (52) is inserted into the wire insertion groove (60). Inserted to, and from the distal end opening of the wire insertion groove (60) (56) to be pulled out to the outside of the wire (55) the protective cap (53). A notch (57) is provided in the peripheral wall of the tip opening (56) of the wire insertion groove (60), and the wire (55) is drawn out of the protective cap (53) from the notch (57).
Of the peripheral wall portion of the protective cap (53), the wire insertion groove forming portion (61) in which the wire insertion groove (60) is formed is thicker than the other portions.
As shown in FIG. 1, FIG. 5, and FIG. 6, the coupler and the wire of the cylinder discrimination sensor (32) that discriminates the cylinder are similarly protected by the protective cap (53).

The configuration of the crank angle detection means is as follows.
As shown in FIGS. 1 and 2, a rotor plate (1) and a crank angle sensor (2) are provided as crank angle detecting means, and the rotor plate (1) is rotated integrally with the crankshaft (3). The detected portion (4) corresponding to the crank angle is provided on the outer peripheral edge of the rotor plate (1), and the detected portion (5) at the tip of the crank angle sensor (2) is provided on the detected portion (4). The crank angle of the crankshaft (3) is detected on the basis of the detection of the detected part (4) passing through the front of the detection part (5) by the crank angle sensor (2). I have to.

  As shown in FIG. 4 (A), the detected portion (4) of the rotor plate (1) includes a plurality of teeth (47) provided at a predetermined interval in the circumferential direction and a tooth missing portion ( 48), and the reference position of the crank angle is detected by detecting the tooth missing portion (48) by the crank angle sensor (2). The reference position of the crank angle is the piston position of the predetermined cylinder, and the crank angle of the crankshaft (3) is detected by detecting the teeth (47) based on the reference position. Specifically, the top dead center positions of the first cylinder and the fourth cylinder are used as the reference position of the crank angle.

As shown in FIGS. 1 and 2, a rotor plate (1) is mounted on a crankshaft (3) in a timing transmission case (8) provided separately from a flywheel housing (7) in which a flywheel (6) is accommodated. ) Is fitted and fixed, the crank angle sensor (2) is attached to the case wall (9) of the timing transmission case (8), and the detector (5) of the crank angle sensor (2) is connected to the timing transmission case (8 ) Is opposed to the detected portion (4) of the rotor plate (1).
Since the timing transmission case (8) is not opened to the outside, the entry of dust from the outside is prevented, and the deterioration of the detection accuracy of the crank angle sensor (2) due to the adhesion of dust to the detection unit (5) is suppressed. can do.

  The rotor plate (1) is fitted and fixed to the crankshaft (3) in a timing transmission case (8) provided separately from the flywheel housing (7) in which the flywheel (6) is accommodated, and the timing transmission is performed. The crank angle sensor (2) is attached to the case wall (9) of the case (8). However, the timing transmission case (8) and the timing transmission device (22) change the type of machine on which the engine is mounted. However, since there is no need to change the structure, the shape of the rotor plate (1), the mounting position and mounting structure of the crank angle sensor (2), the relative posture of the rotor plate (1) and the crank angle sensor (2), etc. also change. Therefore, there is no need to change the adjustment method of the crank angle sensor (2).

For this reason, the adjustment of the crank angle sensor (2) can be unified with other engines having different machines, and the adjustment of the crank angle sensor (2) is facilitated.
As illustrated in FIGS. 1 and 2, the rotor plate () is mounted on the crankshaft (3) in the timing transmission case (8) provided separately from the flywheel housing (7) in which the flywheel (6) is accommodated. 1) is fitted and fixed, and the crank angle sensor (2) is attached to the case wall (9) of the timing transmission case (8), so the mounting structure of the rotor plate (1) and the crank angle sensor (2) The flywheel and flywheel housing of a non-electronically controlled industrial engine that does not include the above can be directly used as an electronically controlled industrial engine.

  In this case, unlike the non-electronically controlled industrial engine, it is necessary to externally fix the rotor plate (1) to the crankshaft (3). For example, a thin crank gear (13) is used. The rotor plate (1) is attached to the crankshaft by a simple structure such as sandwiching the inner peripheral edge (14) of the rotor plate (1) between the crank gear (13) and the seat (12) of the crankshaft (3). Since it can be fixed to (3), it is sufficient to prepare one kind of thin crank gear (13) or the like, and the number of kinds of engine parts can be increased little.

Unlike the non-electronically controlled industrial engine, the timing transmission case (8) requires a mounting portion for the crank angle sensor (2), but the timing transmission case (8) is a machine equipped with the engine. Because there is no need to change the structure even if the type of engine is changed, the timing transmission case (8) for the electronically controlled industrial engine equipped with the mounting part of the crank angle sensor (2) is used for the non-electronically controlled industrial It is sufficient to prepare one type separately from the timing transmission case for the engine, and the number of types of engine parts is small.
As described above, since the increase in the types of engine parts is small, the management of the engine parts is simplified.

The configuration of the cylinder discrimination means is as follows.
As shown in FIG. 1, the cylinder discriminating means includes a sensor plate (31) and a cylinder discriminating sensor (32). The sensor plate (31) is a valve that rotates once while the crankshaft (3) rotates twice. It is attached to the cam shaft (33), and one detected portion (49) is provided on the outer peripheral edge of the sensor plate (31), and this detected portion (49) is detected by the cylinder discrimination sensor (32). Based on this, it is determined whether the reference position of the crank angle detected by the crank angle sensor (2) is the reference position corresponding to which stroke of which cylinder. Specifically, it is determined that the reference position of the crank angle is the top dead center position of the compression stroke of the first cylinder.

  As shown in FIG. 1, a sensor plate (31) is mounted on a valve camshaft (33) in a timing transmission case (8) provided separately from a flywheel housing (7) in which a flywheel (6) is accommodated. Is fitted and fixed, the cylinder discrimination sensor (32) is attached to the case wall (9) of the timing transmission case (8), and the detection part of the cylinder discrimination sensor (32) is a sensor in the timing transmission case (8). It faces the detected part of the plate (31).

  As shown in FIG. 1, the timing transmission case (8) is a timing transmission gear case, and the internal timing transmission device (22) is a timing transmission gear train. The crank gear (13) and the first idle gear (34), a valve operating cam gear (35), a second idle gear (36), and a fuel supply pump gear (37).

As shown in FIG. 2, the crank angle sensor (2) is inclined with respect to the axis of the crankshaft (3). For this reason, it can suppress that the base end part (11) of a crank angle sensor (2) protrudes largely from a timing transmission case (8) to the axial direction of a crankshaft (3), and its orthogonal direction. .
An oil pump (10) surrounding the crankshaft (3) is provided in the timing transmission case (8), and a proximal end portion (11) of a crank angle sensor (2) disposed on the peripheral side of the oil pump (10). ) Is further away from the crankshaft (3) than the detection part (5) at the tip. For this reason, a large-capacity oil pump (10) can be arrange | positioned without making it interfere with the base end part (11) of a crank angle sensor (2).
The oil pump (10) is a trochoid pump, and an inner rotor (39) and an outer rotor (40) are accommodated in a pump case (38) formed integrally with the timing transmission case (8).

As shown in FIG. 2, the inner peripheral edge (14) of the rotor plate (1) is sandwiched between a seat (12) provided on the crankshaft (3) and the crank gear (13), so that the rotor The plate (1) is fixed to the crankshaft (3). For this reason, the rotor plate (1) can be easily fixed by using the crank gear (13) having a thinner thickness than that of the non-electronically controlled industrial engine not provided with the rotor plate (1). .
A crank pulley (15) is disposed at the tip of the crankshaft (3), and a pump drive section (16) of the oil pump (10) is sandwiched between the crank pulley (15) and the crank gear (13). .
The crank pulley (15), the pump drive unit (16), the crank gear (13), and the rotor plate (1) are connected to the crankshaft (3) by a mounting bolt (17) for attaching the crank pulley (15) to the crankshaft (3). ) And fastened together. For this reason, attachment of components, such as a rotor plate (1), becomes easy.
The crank pulley (15) is a pulley that drives the fan belt (45) of the engine cooling fan (44).

As shown in FIG. 2, the seat (12) is provided adjacent to the journal (41) of the crankshaft (3) and receives the rotor plate (1), but the rotor plate (1) is not attached. In this case, the crank gear (13) is received. As shown in FIG. 2, a knock pin (43) attached to the crank gear (13) is engaged with the notch (42) of the rotor plate (1) shown in FIGS. 1) is prevented from rotating.
The crank gear (13) is made thinner by the thickness of the rotor plate (1) than when the rotor plate (1) is not attached. The crank gear (13) is fitted into the crankshaft (3) with a gap. The crank gear (13) may be an intermediate fit or an interference fit on the crankshaft (3).
The pump drive unit (16) is a pump drive gear that is externally fitted and fixed to the crankshaft (1) and has an inner rotor (39) that is externally fitted and fixed.

As shown in FIG. 2, there is a magnetic body (18) in front of the detection part (4) in front of the detection part (5) of the crank angle sensor (2), and the detection part of the rotor plate (1). When the crank angle sensor (2) detects the detected portion (4) based on the magnetism of (4), the magnetic body (18) is covered with a nonmagnetic plate (19). For this reason, detection failure of the crank angle sensor (2) hardly occurs. This is presumably because the magnetic force generated in the magnetic body (18) in front of the detected part (4) is shielded by the nonmagnetic plate (19).
As shown in FIGS. 4 (A) and 4 (B), the detected part (4) has a large number of teeth (47) provided at predetermined intervals in the circumferential direction on the outer peripheral edge of an annular iron plate that is a magnetic body. (47) and a tooth missing part (48). As shown in FIG. 2, the magnetic body (18) is a wall of a cylinder block (23) made of cast iron. The nonmagnetic plate (19) is an aluminum alloy plate and covers only a small area in front of the detection section (5) as shown in FIG. Reference numeral (46) in FIG. 3 denotes an end plate, which is attached to the end face of the cylinder block (23) and constitutes the end wall of the timing transmission case (8) together with the end face of the cylinder block (23).

FIG. 8 shows a modified example of the protective cap. A plurality of protrusions (54) are provided with a retaining protrusion (62) projecting radially inward of the protective cap (53) in a part in the longitudinal direction. The protective cap (53) is prevented from coming off from the coupler (51) by the stop protrusion (62). The retaining protrusion (62) is retained on the tip edge (63) of the coupler (51) to prevent the retaining protrusion (62).
Other configurations are the same as those in FIG. In FIG. 8, the same elements as those in FIG.

(2) Crank angle sensor
(32) Cylinder discrimination sensor
(51) Coupler
(52) Wire
(53) Protective cap
(54) Projections
(55) Groove
(56) Tip opening
(60) Wire insertion groove
(61) Location of wire insertion groove
(62) Retaining protrusion

Claims (3)

In a protection device for a coupler of an electronic component for protecting the coupler (51) attached to the electronic component and the wire (52) led out from the base end portion of the coupler (51),
A plurality of protrusions (54) and grooves (55) directed in the axial length direction of the protective cap (53) are provided on the inner periphery of the protective cap (53) made of an elastic material covering the coupler (51). 54) and grooves (55) are alternately arranged in the circumferential direction of the protective cap (53), and the wire (52) oriented in the axial length direction at an arbitrary circumferential position of the coupler (51) is connected to the coupler (51). A ridge (54) that presses against the peripheral surface of the coupler (51) with the elastic restoring force of the protective cap (53) by covering the coupler (51) with a protective cap (53) made of an elastic material along the peripheral surface. Then, the protective cap (53) is frictionally fixed to the coupler (51), and among the plurality of grooves (55), a predetermined groove (55) is radially outside the protective cap (53) with respect to the other grooves (55). The wire insertion groove (60) swells into the wire insertion groove (60), the wire (52) is inserted into the wire insertion groove (60), and the tip opening (5 Protection structure for an electronic component of the coupler which is to be pulled out to the outside, characterized in that the) from the wire (55) the protective cap (53). In the protective structure of the coupler of the electronic component according to claim 1,
Of the peripheral wall portion of the protective cap (53), the wire insertion groove forming portion (61) in which the wire insertion groove (60) is formed is thicker than the other portions. Protective structure. In the protective structure for a coupler of an electronic component according to claim 1 or 2,
A retaining protrusion (62) protruding radially inward of the protective cap (53) is provided in a part of the longitudinal direction of the plurality of protrusions (54), and the protective cap (53) is coupled to the coupler by the retaining protrusion (62). (51) A structure for protecting a coupler of an electronic component, which is prevented from coming off.

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