JP2017120070A - Equipment with adjustment bolt - Google Patents

Abstract

To provide a device with an adjustment bolt that can suppress removal of a cover that prevents tampering of an adjustment position of the adjustment bolt. An adjustment bolt 3 attached to a bolt mounting wall 2, a lock nut 4 screwed to the adjustment bolt 3, a cover 5 externally fitted to the lock nut 4 so as to be rotatable, and a cover 5 are removed. In a device with an adjusting bolt provided with a retaining means for stopping, the retaining means includes a collar 7 fitted into the peripheral wall 5a of the cover 5 by an interference fit, a pin insertion hole 8 provided in the collar 7, a pin A cover 5 having a locking pin 9 inserted through the insertion hole 8 and a pin locking portion 10 supported by the adjustment bolt 3 and which is about to be removed from the lock nut 4 in a direction away from the bolt mounting wall 2 is a collar. 7 and a locking pin 9 to be locked to the pin locking portion 10. [Selection] Figure 1

Description

  The present invention relates to an apparatus with an adjustment bolt, and more particularly, to an apparatus with an adjustment bolt that can suppress removal of a cover that prevents tampering of an adjustment position of the adjustment bolt.

  Conventionally, a bolt mounting wall in which a female screw hole is formed, an adjustment bolt that is screwed into the female screw hole and attached to the bolt mounting wall, a lock nut that is screwed to the adjustment bolt, and a lock nut that can be rotated. There is a device with an adjustment bolt that includes an externally fitted cover and a retaining portion for retaining the cover (see, for example, Patent Document 1).

  This type of device has an advantage that after adjusting the fuel injection amount at the maximum output of the engine with the adjusting bolt, the lock nut can be covered with a cover to prevent falsification of the adjusting position of the adjusting bolt.

  In the invention of Patent Document 1, the retaining portion of the cover includes a caulking portion constituted by an opening end portion of the peripheral wall of the cover, and a locking portion of a lock nut that locks the caulking portion. A deformation slit that facilitates deformation of the caulking portion is provided.

JP-A-7-71345 (see FIGS. 1 to 5)

<Problem> The cover may be removed illegally.
In the invention of Patent Document 1, in order to falsify the adjustment position of the adjustment bolt, a tool such as a flat-blade screwdriver is inserted into the deformation slit, and there is a possibility that the cover may be illegally extracted due to deformation or destruction of the peripheral wall of the cover.

  The subject of this invention is providing the apparatus with an adjustment bolt which can prevent the unauthorized removal of the cover which prevents the tampering of the adjustment position of an adjustment bolt.

Invention specific matters of the invention according to claim 1 are as follows.
As illustrated in FIG. 1A, a bolt mounting wall (2) having a female screw hole (1),
An adjustment bolt (3) screwed into the female screw hole (1) and attached to the bolt mounting wall (2);
A lock nut (4) screwed to the adjustment bolt (3);
A cover (5) rotatably fitted on the lock nut (4);
In a device with an adjustment bolt provided with a retaining means for retaining the cover (5),
As illustrated in FIGS. 1A, 1C and 1D, the retaining means is
A collar (7) fitted inside the peripheral wall (5a) of the cover (5) with an interference fit;
A pin insertion hole (8) provided in the collar (7);
A locking pin (9) inserted through the pin insertion hole (8);
A pin locking portion (10) supported by the adjustment bolt (3);
The cover (5) to be pulled out from the lock nut (4) in a direction away from the bolt mounting wall (2) is engaged with the pin locking portion (10) via the collar (7) and the locking pin (9). A device with an adjusting bolt, characterized in that it is configured to be stopped.

(Invention of Claim 1)
The invention according to claim 1 has the following effects.
<Effect> It is possible to prevent unauthorized removal of the cover.
As illustrated in FIGS. 1 (A), (C), and (D), a cover (5) that is about to be removed from the lock nut (4) in a direction away from the bolt mounting wall (2) is engaged with the collar (7). Since it is configured to be locked to the pin locking portion (10) via the locking pin (9), unlike the invention of Patent Document 1, the deformation slit is formed on the peripheral wall (5a) of the cover (5). In addition to such a tool insertion hole being formed, the peripheral wall (5a) of the cover (5) is reinforced by the internal fitting of the collar (7). Thereby, a deformation | transformation and destruction of the surrounding wall (5a) of a cover (5) are suppressed, and unauthorized removal of a cover (5) can be prevented.

(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> It is possible to prevent unauthorized removal of the cover.
As illustrated in FIGS. 1A and 1D, the pin locking portion (10) includes a lock nut side pin locking portion (10a) provided on the lock nut (4). 5) is firmly retained by the adjusting bolt (3) via the lock nut (4), and unauthorized removal of the cover (5) can be prevented.

(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 2.
<Effect> It is possible to prevent unauthorized removal of the cover.
As illustrated in FIG. 1C, the pin locking portion (10) also includes a cap nut side pin locking portion (10b) provided on the cap nut (12). The adjustment bolt (3) is firmly retained via the cap nut (12), and unauthorized removal of the cover (5) can be prevented.

(Invention of Claim 4)
The invention according to claim 4 has the following effect in addition to the effect of the invention according to claim 3.
<Effect> It is possible to prevent unauthorized removal of the cover.
As illustrated in FIGS. 1C and 1D, when viewed in a direction parallel to the axial length direction of the adjustment bolt (3), the lock nut side locking pin (9a) and the cap nut side locking pin (9b) Are oriented in directions that cross each other, so that the cover (5) is less likely to be rattled and the problem of inserting a tool into the gap caused by the rattle is suppressed, preventing unauthorized removal of the cover (5). can do.

(Invention according to claim 5)
The invention according to claim 5 has the following effects in addition to the effects of the invention according to any one of claims 1 to 4.
<Effect> It is possible to prevent unauthorized removal of the cover.
As illustrated in FIG. 1A, the tip opening edge (13) of the peripheral wall (5a) of the cover (5) is in contact with the bolt mounting wall (2), so that a tool is inserted into these gaps. Can be prevented and unauthorized removal of the cover (5) can be prevented.

(Invention of Claim 6)
The invention according to claim 6 has the following effects in addition to the effects of the inventions according to claims 1 to 5.
<Effect> Color and cover do not interfere with adjustment bolt adjustment.
As illustrated in FIGS. 1C and 1D, the locking pin 9 inserted through the pin insertion hole 8 has a collar 7 fitted inside the peripheral wall 5a of the cover 5. Therefore, after adjusting the adjustment bolt (3), the collar (7) is externally fitted to the lock nut (4), and the pin is inserted into the pin insertion hole (8). Insert the locking pin (9) into the insertion hole (8), and then fit the collar (7) into the cover (5) to prevent the locking pin (9) from coming out of the pin insertion hole (8). The collar (7) and cover (5) do not interfere with the adjustment bolt (3).

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure explaining the diesel engine with a fuel adjustment volt | bolt which concerns on embodiment of this invention, FIG. 1 (A) is a vertical front view of the principal part, FIG.1 (B) is BB sectional drawing of FIG. 1C is a cross-sectional view taken along the line CC of FIG. 1A, and FIG. 1D is a cross-sectional view taken along the line DD of FIG. It is a longitudinal cross-sectional front view of the part shown to FIG. 1 (A), and its peripheral part.

  1 (A) to 1 (D) and FIG. 2 are diagrams for explaining an engine with an adjustment bolt according to an embodiment of the present invention. In this embodiment, a diesel engine with a vertical and in-line multi-cylinder fuel adjustment bolt is explained. To do.

As shown in FIG. 2, a fuel limiting device (40) is provided on the upper wall (33) of the pump housing case (31).
In this fuel limiting device (40), the maximum fuel injection amount at the rated engine speed is adjusted, and the maximum output of the engine is adjusted.
The adjustment bolt (3) of the fuel limiting device (40) penetrates the bolt mounting wall (2), and its tip protrudes into the pump housing case (31) on the fuel increase swing side of the governor lever (38). The governor lever (38) is received, and the swing position of the governor lever (38) on the fuel increase side is limited.

As shown in FIG. 1A, the fuel limiting device (40) includes a bolt mounting wall (2), an adjusting bolt (3), a lock nut (4), a cover (5), and a retaining means.
A female screw hole (1) is formed in the bolt mounting wall (2).
The adjusting bolt (3) is screwed into the female screw hole (1) and attached to the bolt mounting wall (2).
The lock nut (4) is screwed to the adjustment bolt (3).
The cover (5) is rotatably fitted on the lock nut (4).
The retaining means retains the cover (5).
As shown in FIG. 1A, in this embodiment, after adjusting the maximum fuel injection amount of the engine with the adjusting bolt (3), the lock nut (4) is covered with the cover (5), and the adjusting bolt is used. Prevent tampering of the adjustment position in (3).

As shown in FIG. 1A, the bolt mounting wall (2) is the upper wall (33) of the pump housing case (31).
With the end of the adjustment bolt (3) on the pump housing case (31) side as the tip, the adjustment bolt (3) has a lever receiving portion (41) for receiving the governor lever (38) at the tip, and engages the tool at the base end. A tool engaging portion (18) is provided.
The lever receiving portion (41) is hemispherical, and the tool engaging portion (18) is a hexagonal hole. The adjustment bolt (3) is advanced and retracted in the female screw hole (1) using a special tool engaged with the tool engaging portion (18), and the lock nut (4) is fastened to the adjustment bolt (3). By force, it is fixed to the bolt mounting wall (2) in a locking state.
The lock nut (4) is a hexagon nut, and is pressed and fixed to the bolt mounting wall (2) via the first gasket (42) with a fastening force with the adjustment bolt (3).

As shown in FIG. 1A, the cover (5) has a cap shape.
The fuel limiting device (40) further includes a cap nut (19), and the cap nut (19) covers the tool engaging portion (18) of the adjustment bolt (3).
The cap nut (19) is a hexagonal nut that is screw-fitted to the adjustment bolt (3), and is pressed and fixed to the lock nut (4) via the second gasket (43) by the fastening force with the adjustment bolt (3). Has been.
The bolt mounting wall (2) is made of cast iron, the adjusting bolt (3), the lock nut (4) and the cover (5) are made of steel, and the first gasket (42) and the second gasket (43) are made of copper.
When the cover (5) has a cap shape and the access to the tool engaging portion (18) of the adjusting bolt (3) can be restricted by the cover (5), the cap nut (19) is not necessarily used.
On the other hand, when the cap nut (19) is used, the cover (5) does not necessarily have a cap shape, and may be a cylinder having only the peripheral wall (5a).

As shown in FIGS. 1 (A), (C), and (D), the retaining means is provided in the collar (7) fitted into the peripheral wall (5a) of the cover (5) by an interference fit, and the collar (7). A pin mounting hole (8), a locking pin (9) inserted through the pin insertion hole (8), and a pin locking portion (10) supported by the adjustment bolt (3), The cover (5) to be pulled out from the lock nut (4) in the direction away from (2) is locked to the pin locking portion (10) via the collar (7) and the locking pin (9). It is configured as follows.
According to the above configuration, unlike the invention of Patent Document 1, in addition to the fact that a tool insertion hole such as a deformation slit is not formed on the peripheral wall (5a) of the cover (5), the cover is covered by the internal fitting of the collar (7). The peripheral wall (5a) of (5) is reinforced. Thereby, a deformation | transformation and destruction of the surrounding wall (5a) of a cover (5) are suppressed, and unauthorized removal of a cover (5) can be prevented.

As shown to FIG. 1 (A) (D), the pin latching | locking part (10) is provided with the lock nut side pin latching | locking part (10a) provided in the lock nut (4).
For this reason, the cover (5) is firmly secured to the adjusting bolt (3) via the lock nut (4), and unauthorized removal of the cover (5) can be prevented.

  As shown in FIGS. 1 (A) and 1 (D), the lock nut (4) has a smaller diameter than the wrench engaging portion (4a) and the wrench engaging portion (4a) and is smaller than the wrench engaging portion (4a). A small-diameter portion (4b) near the bolt mounting wall (2) is provided, and the lock nut side pin locking portion (10a) is formed between the outer peripheral surface of the wrench engaging portion (4a) and the small-diameter portion (4b). It is composed of an annular surface.

As shown in FIG. 1 (A), a cap nut (12) that is screw-fitted to the adjustment bolt (3) and covers the tool engaging portion (11) of the adjustment bolt (3) is provided. As illustrated, the pin locking portion (10) also includes a cap nut side pin locking portion (10b) provided on the cap nut (12).
According to the above configuration, the cover (5) is firmly retained by the adjustment bolt (3) via the cap nut (12), and unauthorized removal of the cover (5) can be prevented.

  As shown in FIGS. 1 (A) and 1 (C), an annular groove (12b) is formed in the wrench engaging surface (12a) of the cap nut (12), and the cap nut side pin locking portion (10b) It is comprised by the ceiling surface of a groove | channel (12a).

As shown in FIGS. 1 (A), (C), and (D), the locking pin (9) includes a lock nut side locking pin (9a) locked to the lock nut side pin locking portion (10a), and A cap nut side locking pin (9b) that is locked to the cap nut side pin locking portion (10b) is provided.
As shown in FIGS. 1C and 1D, the lock nut side locking pin (9a) and the cap nut side locking pin (9b) are viewed in a direction parallel to the axial length direction of the adjusting bolt (3). , Oriented in directions that intersect each other.
According to the said structure, the cover (5) is hard to rattle, the malfunction which inserts a tool in the clearance gap which arose by the rattle is suppressed, and unauthorized removal of the cover (5) can be prevented.

As shown in FIGS. 1C and 1D, a lock nut side locking pin (9a) and a cap nut side locking pin (9b) are provided in pairs, and a pair of lock nut side locking pins (9a) is provided. Are oriented parallel to each other on both sides of the small diameter portion (4b) of the lock nut (4), and the pair of cap nut side locking pins (9b) are parallel to each other on both sides of the cap nut (4). Is oriented.
The lock nut side locking pin (9a) and the cap nut side locking pin (9b) are oriented in directions orthogonal to each other.

As shown in FIG. 1A, with the end of the peripheral wall (5a) of the cover (5) on the bolt mounting wall (2) side as the front end, the front end opening edge (13) of the peripheral wall (5a) of the cover (5) is The bolt mounting wall (2) is in contact.
According to the said structure, the malfunction which inserts a tool in these clearance gaps is suppressed, and unauthorized removal of a cover (5) can be prevented.

As shown in FIGS. 1C and 1D, the locking pin 9 inserted through the pin insertion hole 8 is fitted with the collar 7 in the peripheral wall 5a of the cover 5. Thus, the pin insertion hole (8) is configured to be prevented from coming off.
According to the above configuration, after adjusting the adjustment bolt (3), the collar (7) is externally fitted to the lock nut (4), and the locking pin (9) is inserted into the pin insertion hole (8). The collar (7) can be fitted into the cover (5) to prevent the locking pin (9) from coming out of the pin insertion hole (8). The collar (7) and the cover (5) are attached to the adjusting bolt (3 ) Will not interfere with the adjustment.

  As shown in FIGS. 1C and 1D, the pin insertion hole (8) is provided in the lock nut (4), and the lock nut side pin insertion hole (8a) through which the lock nut side locking pin (9a) is inserted. ) And a cap nut side locking pin (8b) that is provided on the cap nut (12) and allows the cap nut side locking pin (9b) to pass therethrough.

The contents of each embodiment of the present invention are as described above. However, the present invention is limited to a diesel engine with a fuel adjustment bolt that adjusts the fuel injection amount of the fuel injection pump with the adjustment bolt as in each of the above embodiments. It is not a thing.
For example, it can also be used for various hydraulic devices with adjusting bolts and engines with adjusting bolts, such as a hydraulic pump with an oil amount adjusting bolt that adjusts the oil discharge amount of the hydraulic pump with the adjusting bolt.

(1) Female thread hole
(2) Bolt mounting wall
(3) Adjustment bolt
(4) Lock nut
(5) Cover
(5a) Perimeter wall
(7) Color
(8) Pin insertion hole
(9) Locking pin
(9a) Locking nut side locking pin
(9b) Cap nut lock pin
(10) Pin locking part
(10a) Lock nut side pin locking part
(10b) Cap nut side pin locking part
(11) Tool engaging part
(12) Cap nut
(13) Tip opening edge

Claims (6)

A bolt mounting wall (2) in which a female screw hole (1) is formed;
An adjustment bolt (3) screwed into the female screw hole (1) and attached to the bolt mounting wall (2);
A lock nut (4) screwed to the adjustment bolt (3);
A cover (5) rotatably fitted on the lock nut (4);
In a device with an adjustment bolt provided with a retaining means for retaining the cover (5),
The retaining means is
A collar (7) fitted inside the peripheral wall (5a) of the cover (5) with an interference fit;
A pin insertion hole (8) provided in the collar (7);
A locking pin (9) inserted through the pin insertion hole (8);
A pin locking portion (10) supported by the adjustment bolt (3);
The cover (5) to be pulled out from the lock nut (4) in a direction away from the bolt mounting wall (2) is engaged with the pin locking portion (10) via the collar (7) and the locking pin (9). A device with an adjusting bolt, characterized in that it is configured to be stopped. In the apparatus with an adjustment bolt described in claim 1,
The pin locking part (10) includes a lock nut side pin locking part (10a) provided on the lock nut (4), and an apparatus with an adjusting bolt, characterized in that In the apparatus with an adjustment bolt described in claim 2,
A cap nut (12) that is screwed to the adjustment bolt (3) and covers the tool engaging portion (11) of the adjustment bolt (3);
The pin locking portion (10) is also provided with a cap nut side pin locking portion (10b) provided on the cap nut (12), and the device with adjusting bolts is provided. In the apparatus with an adjustment bolt described in claim 3,
The locking pin (9) includes a lock nut side locking pin (9a) locked to the lock nut side pin locking portion (10a) and a bag locked to the cap nut side pin locking portion (10b). It has a nut side locking pin (9b),
The lock nut side locking pin (9a) and the cap nut side locking pin (9b) are oriented in directions intersecting with each other when viewed in a direction parallel to the axial length direction of the adjustment bolt (3). A device with adjusting bolts. The device with an adjustment bolt according to any one of claims 1 to 4, wherein the end of the peripheral wall (5a) of the cover (5) on the bolt mounting wall (2) side is a tip.
A device with an adjusting bolt, characterized in that the tip opening edge (13) of the peripheral wall (5a) of the cover (5) is in contact with the bolt mounting wall (2). In the apparatus with an adjustment bolt as described in any one of Claims 1-5,
The locking pin (9) inserted through the pin insertion hole (8) is prevented from being removed from the pin insertion hole (8) by the collar (7) being fitted into the peripheral wall (5a) of the cover (5). A device with an adjusting bolt, characterized by being configured to be

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