JP2010129315A - Fusible link unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To ensure rotation prevention of a fuse unit around a battery post and fixation thereof to a battery terminal. <P>SOLUTION: A washer 31 and a nut body 32 are inserted over a stud bolt 13 passing through an oblong hole 18A, and the nut body 32 is screwed onto the stud bolt 13 in the state that a pinion 31a of the washer 31 engages with a rack 34. Thereby, a fuse unit supporting plate 16 can be moved in the abutting direction and the fuse unit supporting plate 16 and a bus bar 9 can be moved in the mutually approaching direction. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a fusible link unit of a type in which a fuse unit is directly attached to a battery terminal attached to a battery post.

  Various types of fusible link units in which a fuse unit is directly attached to a battery terminal mounted on a battery post have been proposed. The fuse unit in this fusible link unit connects an automobile battery and a power supply wire, and includes a conductive metal fuse element including a fusible part and an insulating resin body in which the fuse element is insert-molded. (For example, refer patent document 1).

  As a fusible link unit of the type in which a fuse unit is directly attached to such a battery terminal, there are those shown in FIGS. The fusible link unit includes a battery terminal 1 and a fuse unit 2 directly attached to the battery terminal 1. Among these, the battery terminal 1 is manufactured by pressing a conductive metal plate.

  The battery terminal 1 includes a pair of cutout annular portions 5 and 6 that are vertically inserted into the battery post 4 of the battery 3 and U-shaped connecting portions 7 and 8 that are continuous with the cutout annular portions 5 and 6. One end of the bus bar 9 is interposed between the cutout annular portions 5 and 6, and the other end of the bus bar 9 faces a position 90 degrees away from the connecting portions 7 and 8. The connecting portions 7 and 8 are opposed to each other with a predetermined width in the horizontal direction.

  The connecting portions 7 and 8 are each provided with mounting holes (not shown) on substantially the same horizontal line (center line), and bolts 10 are inserted through these mounting holes. A nut 11 is screwed to the tip of the shaft protruding from the ends of the connecting portions 7 and 8 of the bolt 10 via a washer 12. Therefore, the notch annular portions 5 and 6 are inserted into the battery post 4 of the battery 3 and the nut 11 is tightened from the front end side of the shaft portion of the bolt 10 to narrow the gap between the connecting portions 7 and 8. 5 and 6 can be firmly held by the battery post 4.

  The upper surface of the bus bar 9 is a smooth support surface 9a, and a stud bolt 13 penetrating upward from the lower surface side of the bus bar 9 through an attachment hole 9b provided in the bus bar 9 is attached to the support surface 9a. ing. In addition, between the notch annular parts 5 and 6, between the connection parts 7 and 8, and the side part of the bus-bar 9 are covered with the decorative frame 14 of the predetermined shape which makes those external appearances favorable.

  On the other hand, the fuse unit 2 is composed of a conductive metal fuse element (not shown) having a plurality of soluble portions in a resin body 15 formed in an L shape as a whole. The fuse element receives a battery voltage, and is connected to the fuse unit support plate 16 for supporting the fuse unit 2 on the battery terminal 1 and the fuse unit support plate 16 via, for example, a narrow narrow portion of a crank shape. A tab terminal (not shown). These tab terminals protrude into the connector chamber in each female connector housing 17 integrated with the resin body 15. These tab terminals and the connector housing 17 constitute a female connector.

  The fuse unit support plate 16 is electrically connected to the bus bar 9 of the battery terminal 1 and functions to support the entire fuse unit 2. The fuse unit support plate 16 has a horizontal plate shape, and a round hole 8 is formed at the center. The fuse unit support plate 16 is formed in a size and thickness having a predetermined strength in order to support the entire weight of the fuse unit 2.

  Accordingly, the round hole 18 of the fuse unit support plate 16 is passed through the stud bolt 13 passed through the mounting hole 9 b of the bus bar 9, and the nut 20 is screwed into the end of the stud bolt 13 passed through the round hole 18 via the washer 19. Thus, the fuse unit support plate 16 can be fixed to the stud bolt 13. As a result, the fuse unit 2 can be stably connected to the battery terminal 1.

  As described above, the resin body 15 has an L-shape and has a vertical portion 21, and an abutting portion 22 that protrudes toward the side surface of the battery 3 is integrally provided at the lower end of the vertical portion 21. . The entire abutting portion 22 is bowl-shaped (or L-shaped), and the front end surface thereof is a substantially vertical abutting surface 22 a that can be in close contact with the battery 3. The vertical piece 21 is integrally provided with a plurality of reinforcing pieces 23 having different shapes and sizes that reinforce the vicinity of the abutting portion 22.

Therefore, when the fuse unit 2 is connected to the battery terminal 1, the abutting surface 22a of the abutting portion 22 of the fuse unit 2 contacts the side surface of the battery 3 as shown in FIG. This contact restricts the rotation of the battery terminal 1 and the fuse unit 2 around the battery post 4. Thereby, it can avoid that the contact resistance with respect to the battery post 4 of the notch annular parts 5 and 6 falls during driving | running | working of a vehicle, and it can avoid beforehand that the contact becomes incomplete or unstable.
JP 2001-297683 A

  However, in the conventional fusible link unit, since the fuse unit 2 and the abutting portion 22 are designed and manufactured according to the form of the battery 3 and the battery terminal 1, for example, the battery size and the battery post 4 When the positions are different, there is a disadvantage that the abutting surface 22a cannot be brought into close contact with the side surface of the battery 3 correctly. In this case, the fuse unit 2 rotates or rattles around the battery post 4. As described above, the conventional fuse unit 2 does not have a configuration applicable to any battery, and has a problem that it lacks versatility.

  The present invention has been made in view of the above-described circumstances, and its purpose is to firmly fix the fuse unit at the normal position of the battery terminal regardless of the form of the battery and the installation position of the battery terminal. It is an object of the present invention to provide a fusible link unit that can prevent inadvertent rotation about a battery post of a fuse unit by correctly abutting a portion against a side surface of a battery.

In order to achieve the above-described object, the fusible link unit according to the present invention is characterized by the following (1) to (2).
(1) The fuse unit is directly attached to the battery terminal mounted on the battery post, and the abutting portion projecting from the fuse unit is abutted against the side surface of the battery, whereby the battery post of the fuse unit is centered. A fusible link unit configured to be restricted in rotation,
A stud bolt provided in the battery terminal and protruding upward from the upper surface of the battery terminal through the bus bar;
A pinion nut having a washer having a pinion formed on the periphery, and a nut body that can be screwed onto the stud bolt;
A fuse unit support plate provided in the fuse unit, having a long hole penetrated by the stud bolt, and a rack meshed with the pinion of the washer;
With
The long hole is formed in the fuse unit support plate so as to extend long in the abutting direction of the abutting portion with respect to the battery side surface,
The rack is formed in the fuse unit along the abutting direction,
The fuse unit is supported by inserting the washer and the nut main body into the stud bolt penetrating the elongated hole, and screwing the nut main body into the stud bolt in a state where the pinion of the washer is engaged with the rack. The plate can be moved in the abutting direction, and the fuse unit support plate and the bus bar can be moved in a direction in which they approach each other.
thing.
(2) A fusible link unit configured as described in (1) above,
When the nut main body is screwed into the stud bolt, and the frictional force acting between the washer and the nut main body becomes larger than the maximum static frictional force due to the abutting portion abutting against the battery side surface. The nut main body rotates with respect to the washer, so that the abutting portion can be moved in a direction in which the fuse unit support plate and the bus bar approach each other in a state where the abutting portion abuts against the side surface of the battery.
thing.

  According to the configuration of (1) above, since the rack is moved toward the stud bolt by the pinion by screwing the nut with the pinion, the abutting portion of the fuse unit moves toward the side surface of the battery, and finally the abutting surface is Adhering closely to the battery side, the movement of the rack is restricted. Thereby, both the detent centering on the battery post of the fuse unit and the reliable fixing to the battery terminal can be implemented by screwing the nut with pinion into the stud bolt.

  Further, according to the configuration of (2), in the configuration of (1), if the tightening of the pinion nut to the stud bolt is still insufficient or incomplete, the nut with pinion is attached to the stud. Tighten the bolt further. At this time, since the rotation is restricted in a state where the pinion is engaged with the rack, only the nut body of the pinion-equipped nut independently rotates while sliding (sliding) on the washer having the pinion. For this reason, tightening of the terminal mounting portion of the fuse unit with only the nut main body is performed strongly and reliably.

  According to the present invention, the fuse unit can be firmly fixed to the regular position of the battery terminal regardless of the form of the battery and the installation position of the battery terminal, and the abutting portion is correctly abutted on the side of the battery. Inadvertent rotation around the battery post can be prevented.

  The present invention has been briefly described above. Furthermore, the details of the present invention will be further clarified by reading through the best mode for carrying out the invention described below with reference to the accompanying drawings.

Hereinafter, a preferred embodiment of a fusible link unit according to the present invention will be described with reference to the drawings.
Here, FIG. 1 is a perspective view of the fusible link unit according to the present embodiment. FIG. 2 is a side view when the fusible link unit shown in FIG. 1 is attached to the battery. FIG. 3 is a plan view of a state in which the fusible link unit shown in FIG. 1 is attached to the battery. FIG. 4 is an enlarged front view of the vicinity of a nut portion with a pinion in a state where the fusible link unit is attached to the battery. FIG. 5 is a side view of the fusible link unit shown in FIG. FIG. 6 is a plan view of the fusible link unit shown in FIG. 1 attached to the battery. FIG. 7 is an enlarged front view of the vicinity of a nut portion with a pinion in a state where the attachment of the fusible link unit to the battery is completed.

  The fusible link unit according to this embodiment includes a battery terminal 1 and a fuse unit 2 directly attached thereto. Among these, the battery terminal 1 is manufactured by pressing a conductive metal plate.

  The battery terminal 1 includes a pair of cutout annular portions 5 and 6 that are vertically inserted into the battery post 4 of the battery 3 and U-shaped connecting portions 7 and 8 that are continuous with the cutout annular portions 5 and 6. One end of the bus bar 9 is interposed between the cutout annular portions 5 and 6, and the other end of the bus bar 9 faces a position 90 degrees away from the connecting portions 7 and 8. The connecting portions 7 and 8 face each other in the horizontal direction with a predetermined gap through a part of the bus bar 9 having a predetermined width.

  The connecting portions 7 and 8 are each provided with mounting holes (not shown) on substantially the same horizontal line (center line), and bolts 10 are inserted through these mounting holes. A nut 11 is screwed to the tip of the shaft protruding from the ends of the connecting portions 7 and 8 of the bolt 10 via a washer 12. Therefore, by inserting the notched annular portions 5 and 6 into the battery post 4 and tightening the nut 11 from the front end side of the shaft portion of the bolt 10, the gap between the connecting portions 7 and 8 is narrowed. 6 can be securely held by the battery post 4.

  The upper surface of the bus bar 9 is a smooth support surface 9a, and a stud bolt 13 penetrating upward from the lower surface side of the bus bar 9 through an attachment hole 9b provided in the bus bar 9 is attached to the support surface 9a. It has been. In addition, between the notch annular parts 5 and 6, between the connection parts 7 and 8, and the side part of the bus-bar 9 are covered with the decorative frame 14 of the predetermined shape which makes those external appearances favorable.

  On the other hand, the fuse unit 2 is formed by housing a conductive metal fuse element (not shown) having a plurality of soluble portions in an L-shaped resin body 15. The fuse element receives a battery voltage, and is connected to the fuse unit support plate 16 for supporting the fuse unit 2 on the battery terminal 1 and the fuse unit support plate 16 via, for example, a narrow narrow portion of a crank shape. A tab terminal (not shown). These tab terminals protrude into the connector chamber in each female connector housing 17 integrated with the resin body 15. These tab terminals and the connector housing 17 constitute a female connector.

  The fuse unit support plate 16 is joined to a part of the bus bar 9 around the stud bolt 13, thereby being electrically connected and functioning to support the entire fuse unit 2. The fuse unit support plate 16 has a horizontal plate shape, and a hole (long hole) 18A extending in the abutting direction of the abutting portion 22 against the side surface of the battery 3 is formed in the center portion.

  The fuse unit support plate 16 is formed in a size and thickness having a predetermined strength in order to support the entire weight of the fuse unit 2. Accordingly, the long hole 18A of the fuse unit support plate 16 is passed through the stud bolt 13 that passes through the bus bar 9 and protrudes upward, and the nut 30 with a pinion is screwed into the end of the stud bolt 13 that passes through the long hole 18A. it can. The fuse unit support plate 16 can be fixed to the stud bolt 13 by further screwing the nut 30 with pinion. As a result, the fuse unit 2 can be stably fixed to the battery terminal 1.

  By the way, the nut 30 with a pinion is integrally coupled to a washer 31 having a pinion 31a integrally on the periphery and a nut body 32 that can be screwed to the stud bolt 13 so as to be slidable with a predetermined frictional force. Made up of. For this reason, in the process of screwing the nut body 32 into the stud bolt 13 as described above, the driving (rotation) torque that exceeds a predetermined static torque (torque determined by the maximum static frictional force) of the washer 31 with respect to the nut body 32. However, when added to the nut body 32, the nut body 32 slides on the washer 31 independently of the stationary washer 31. Accordingly, the nut body 32 is screwed into the stud bolt 13 so as to rotate integrally with the washer 31 below a predetermined static torque.

  On the other hand, a rack plate 33 is erected on the fuse unit 2 along one side edge of the fuse unit support plate 16, and a rack 34 projects from the rack plate 33 at a position facing the surface of the fuse unit support plate 16. ing. The rack 34 is formed along the abutting direction of the abutting portion 22 of the fuse unit support plate 16, and the length thereof is substantially equal to the movable distance of the abutting portion 22.

  The size and pitch of the teeth of the rack 34 are substantially equal to the size and pitch of the teeth of the pinion 31a, and the pinion 31a can be smoothly rotated. The nut 30 with a pinion allows the washer 31 to rotate while sliding on the fuse unit support plate 16 while meshing the pinion 31a with the rack 34 of the rack plate 33.

  As described above, the resin body 15 has an L-shape and has a vertical portion 21, and an abutting portion 22 that protrudes toward the side surface of the battery 3 is integrally provided at the lower end of the vertical portion 21. . The tip of the abutting portion 22 is an abutting surface 22a that can be brought into close contact with the battery 3 in the same manner as described above. Note that a plurality of reinforcing pieces 23 having different shapes and sizes are integrally projected on the vertical piece 21.

  By the fusible link unit having the above-described configuration, the fuse unit 2 is assembled to the battery 3 together with the battery terminal 1 as follows. First, the cutout annular portions 5 and 6 are inserted into the battery post 4 and fastened to the tip of the shaft portion of the bolt 10 screwed into the nut 11. As a result, the gap between the connecting portions 7 and 8 is narrowed, and the notched annular portions 5 and 6 are firmly held by the battery post 4.

  Next, the long hole 18 </ b> A of the fuse unit support plate 16 is passed through the stud bolt 13 penetrating the bus bar 9. A nut 30 with a pinion is screwed into the end of the stud bolt 13 passed through the long hole 18A. The nut 30 is screwed in a state where the lower surface of the washer 31 of the pinion-equipped nut 30 is in sliding contact with the fuse unit support plate 16. At this time, the pinion 31 a on the outer periphery of the washer 31 is engaged with the rack 34 of the rack plate 33.

  Following the engagement of the pinion 31a with the rack plate 33, the pinion-equipped nut 30 is further screwed. As a result, the fuse unit support plate 16 is lowered along the stud bolts 13 (in other words, the bus bar 9 is floated along the stud bolts 13), and the fuse unit support plate 16 is moved in the length direction of the rack 34 (abutment). The unit 22 is moved horizontally in the abutting direction with respect to the side surface of the battery 3. This horizontal movement is made possible by the long hole 18A being guided by the stud bolt 13.

  At the beginning of this screwing operation, the butting surface 22a of the butting portion 22 is separated from the side surface of the battery 3 as shown in FIG. 2, but gradually approaches as the screwing proceeds, and finally comes into contact as shown in FIG. . The contact operation of the abutting surface 22a with the side surface of the battery 3 restricts the screwing operation of the nut 30 with pinion into the stud bolt 13.

  In this state, the lower surface of the fuse unit support plate 16 may leave a gap G without contacting the upper surface of the bus bar 9, as shown in FIG. In this case, the mounting state of the fuse unit 2 with respect to the battery terminal 1 is still incomplete and unstable. For this reason, the pinion-equipped nut 30 is continuously screwed into the stud bolt 13 more strongly.

  At this time, the rotation of the pinion 31a of the washer 31 meshed with the rack 34 that cannot move due to the abutment is restricted, but the operating torque of the screwing operation is the maximum static frictional force between the washer 31 and the nut body 32 ( When the static torque) is exceeded, the nut body 32 starts to slide with respect to the washer 31 on these friction surfaces. For this reason, the nut main body 32 is brought into close contact with the lower surface of the fuse unit support plate 16 by the further screwing operation on the stud bolt 13 and finally comes into a state shown in FIG.

  Therefore, the fuse unit 2 is firmly fixed to the battery terminal 1, and the abutting surface 22 a comes into strong contact with the side surface of the battery 3. As a result, the displacement of the fuse unit 2 and the rotation around the battery post 4 are restricted while the vehicle is running. Further, since the movement amount of the fuse unit 2 can be adjusted with respect to the stud bolt 13 through the long hole 18A, even if the size of the battery 3 and the position of the battery post 4 are different, the nut 30 with the pinion The abutting surface 22a can be brought into close contact with the side surface of the battery 3 by horizontal movement of the fuse unit support plate 16 by operation.

  As described above, according to the present embodiment, the fuse unit support plate 16 having the long hole 18A penetrating the stud bolt 13 of the battery terminal 1 is provided in the fuse unit 2, and the pinion 31a is formed at the periphery. A nut 30 with a pinion having a washer 31 and a nut body 32 integrated so as to be slidably contactable with the washer 31 with a predetermined frictional force is provided, and the fuse unit 2 is provided with the abutting portion 22 of the fuse unit 2. A rack 34 to be engaged with the pinion 31a is provided along the abutting direction with respect to the side surface of the battery 3, and the rack 34 to be engaged with the pinion 31a is horizontally abutted by a screwing operation of the nut 30 with pinion to the stud bolt 13 The part 22 can be abutted against the side surface of the battery 3 and abutted. Even after abut 22 to the battery 3 side and it enables screwing the stud bolt 13 while the nut body 32 of the pinion nut 30 is slid onto the washer 31.

  As a result, the long hole 18A provided in the fuse unit support plate 16 is passed through the stud bolt 13, and the nut 30 with a pinion is screwed into the stud bolt 13 so that the pinion 31a is engaged with the rack 34 of the fuse unit 2. Thus, the rack 34 can be moved in the abutting direction. Accordingly, the abutting portion 22 is moved toward the side surface of the battery 3, and finally the abutting surface 22 a can be brought into close contact with the side surface of the battery 3.

  Further, when the fastening of the pinion nut 30 to the stud bolt 13 is incomplete, the pinion nut 30 is further tightened so that only the nut body 32 of the pinion nut 30 is placed on the washer 31 having the pinion 31a. The fuse unit support plate 16 can be firmly joined to the bus bar 9 by screwing only the nut main body 32. As a result, it is possible to achieve rotation prevention around the battery post 4 of the fuse unit 2 and secure fixing to the battery terminal 1.

It is a perspective view of an embodiment of a fusible link unit according to the present invention. It is a side view of the attachment state with respect to the battery of the fusible link unit shown in FIG. It is a top view of the attachment state with respect to the battery of the fusible link unit shown in FIG. FIG. 6 is an enlarged front view of the vicinity of a nut portion with a pinion when the fusible link unit is attached to a battery. It is a side view of the attachment completion state with respect to the battery of the fusible link unit shown in FIG. It is a top view of the completion state of attachment with respect to the battery of the fusible link unit shown in FIG. FIG. 5 is an enlarged front view of the vicinity of a nut portion with a pinion in a state where the fusible link unit is attached to a battery. It is a perspective view of the conventional fusible link unit. It is a side view of the attachment state with respect to the battery of the fusible link unit shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Battery terminal 2 Fuse unit 3 Battery 4 Battery post 5, 6 Notch annular part 7, 8 Connection part
9 Busbar 10 Bolt 11 Nut 12 Washer 13 Stud Bolt 15 Resin Body 16 Fuse Unit Support Plate 17 Female Connector Housing 18A Long Hole 21 Vertical Piece 22 Abutting Portion 22a Abutting Surface 30 Pinion Nut 31 Washer 31a Pinion 32 Nut Body 33 Rack plate 34 racks

Claims (2)

The fuse unit is directly attached to the battery terminal attached to the battery post, and the abutting portion protruding from the fuse unit is abutted against the side surface of the battery, whereby the rotation of the fuse unit around the battery post is performed. A fusible link unit configured to be regulated,
A stud bolt provided in the battery terminal and protruding upward from the upper surface of the battery terminal through the bus bar;
A pinion nut having a washer having a pinion formed on the periphery thereof, and a nut body threadably engageable with the stud bolt;
A fuse unit support plate provided in the fuse unit, having a long hole penetrated by the stud bolt, and a rack meshed with the pinion of the washer;
With
The long hole is formed in the fuse unit support plate so as to extend long in the abutting direction of the abutting portion with respect to the battery side surface,
The rack is formed in the fuse unit along the abutting direction,
The fuse unit is supported by inserting the washer and the nut main body into the stud bolt penetrating the elongated hole, and screwing the nut main body into the stud bolt in a state where the pinion of the washer is engaged with the rack. The plate can be moved in the abutting direction, and the fuse unit support plate and the bus bar can be moved in a direction in which they approach each other.
This is a fusible link unit. When the nut main body is screwed into the stud bolt, and the frictional force acting between the washer and the nut main body becomes larger than the maximum static frictional force due to the abutting portion abutting against the battery side surface. The nut main body rotates with respect to the washer, so that the abutting portion can be moved in a direction in which the fuse unit support plate and the bus bar approach each other in a state where the abutting portion abuts against the side surface of the battery.
The fusible link unit according to claim 1.

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