JP6537449B2 - Adjustment bolted equipment - Google Patents

Description

  BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to an adjustment bolted device, and more particularly, to an adjustment bolted device capable of suppressing the removal of a cover that prevents the adjustment position of the adjustment bolt from being tampered with.

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

  In this type of device, after adjusting the fuel injection amount and the like at the maximum output of the engine with the adjustment bolt, there is an advantage that the lock nut can be covered with a cover to prevent falsification of the adjustment position of the adjustment bolt.

  In the invention of Patent Document 1, the cover retaining portion is provided with a caulking portion constituted by the open end of the peripheral wall of the cover, and a locking portion for locking the caulking portion. A deformation slit is provided to facilitate deformation of the crimped portion.

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

<< Problem >> There is a risk that 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 flathead screwdriver is inserted into the deformation slit, and there is a possibility that the cover may be extracted improperly due to the deformation or destruction of the peripheral wall of the cover.

  SUMMARY OF THE INVENTION It is an object of the present invention to provide an adjustment bolted device capable of preventing improper removal of a cover which prevents falsification of the adjustment position of the adjustment bolt.

(Specific items of the invention common to the invention according to claim 1 and claim 4)
As illustrated in FIG. 1 (A), 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 onto the adjustment bolt (3),
A cover (5) rotatably fitted on the lock nut (4);
In an adjustable bolted instrument provided with retaining means for retaining the cover (5),
As exemplified in FIGS. 1 (A) (C) (D), the retaining means is
A collar (7) internally fitted on the peripheral wall (5a) of the cover (5) in an interference fit;
A pin insertion hole (8) provided in the collar (7);
A locking pin (9) inserted into the pin insertion hole (8);
A pin lock (10) supported by the adjustment bolt (3);
A cover (5) which is to be pulled out of the lock nut (4) in a direction away from the bolt mounting wall (2) engages with the pin locking portion (10) via the collar (7) and the locking pin (9). It is configured to be stopped .
(Invention specific matters specific to the invention according to claim 1)
As illustrated in FIGS. 1 (A) and 1 (D), the pin locking portion (10) includes a lock nut side pin locking portion (10a) provided on the lock nut (4). Equipment with adjustment bolt.
(Invention-Specific Items Specific to the Invention According to Claim 4)
As illustrated in FIG. 1 (A) (C), a cap nut (12) screwed to the adjustment bolt (3) and covering the tool engaging portion (11) of the adjustment bolt (3) ,
A device with an adjustment bolt characterized in that the pin locking portion (10) includes a cap nut side pin locking portion (10b) provided on the cap nut (12).

(Invention of claim 1)
The invention according to claim 1 has the following effects.
<< Effect 1-1 >> It is possible to prevent unauthorized removal of the cover.
As illustrated in FIGS. 1 (A) (C) (D), the cover (5) to be removed from the lock nut (4) in the direction away from the bolt mounting wall (2) engages 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 slit for deformation is formed on the peripheral wall (5a) of the cover (5) In addition to the fact that a tool insertion like this is not formed, the inner wall of the collar (7) reinforces the peripheral wall (5a) of the cover (5). Thereby, a deformation | transformation and destruction of the surrounding wall (5a) of a cover (5) are suppressed, and the improper extraction of a cover (5) can be prevented.

<< Effect 1-2 >> Improper removal of the cover can be prevented.
As illustrated in FIGS. 1A and 1D, the pin locking portion (10) includes the lock nut side pin locking portion (10a) provided on the lock nut (4). 5) is firmly held by the adjustment bolt (3) via the lock nut (4), so that unauthorized removal of the 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 FIG. 1C, since the pin locking portion (10) also includes a cap nut side pin locking portion (10b) provided on the cap nut (12), the cover (5) It is firmly held by the adjusting bolt (3) via the cap nut (12), so that 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 FIGS. 1 (C) and 1 (D), when viewed in a direction parallel to the axial direction of the adjustment bolt (3), the lock nut side locking pin (9a) and the cap nut side locking pin (9b) The cover (5) is less likely to rattle, the problem of inserting a tool into the gap caused by rattling is suppressed, and improper removal of the cover (5) is prevented. can do.

(Invention of claim 4)
The invention according to claim 4 has the following effect in addition to the effect 1-1 of the invention according to claim 1.
<< Effect >> It is possible to prevent unauthorized removal of the cover.
As illustrated in FIG. 1C, since the pin locking portion (10) includes the cap nut side pin locking portion (10b) provided on the cap nut (12), the cover (5) It is firmly held by the adjusting bolt (3) via the cap nut (12), and improper removal of the cover (5) can be prevented.
(Invention of claim 5)
The invention according to claim 5 has the following effect in addition to the effect 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, since the tip opening edge (13) of the peripheral wall (5a) of the cover (5) is in contact with the bolt mounting wall (2), insert a tool into these gaps. Failure can be suppressed, and unauthorized removal of the cover (5) can be prevented.

(Invention according to claim 6)
The invention according to claim 6 exerts the following effects in addition to the effects of the invention according to any of claims 1 to 5.
«Effect» The collar and cover do not interfere with the adjustment of the adjustment bolt.
As illustrated in FIGS. 1 (C) and 1 (D), in the locking pin (9) inserted into the pin insertion hole (8), the collar (7) is fitted in the peripheral wall (5a) of the cover (5) Thus, the adjustment bolt (3) is adjusted, and then the collar (7) is externally fitted to the lock nut (4) to adjust the pin. Insert the locking pin (9) into the insertion hole (8) and then fit the collar (7) inside 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) do not interfere with the adjustment of the adjustment bolt (3).

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view for explaining a fuel adjustment bolted diesel engine according to an embodiment of the present invention, FIG. 1 (A) is a longitudinal sectional front view of the main part, and FIG. 1 (C) is a cross-sectional view taken along the line C-C in FIG. 1 (A), and FIG. 1 (D) is a cross-sectional view taken along the line D-D in FIG. 1 (A). It is a longitudinal cross-section 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 adjustment bolted engine according to an embodiment of the present invention. In this embodiment, a vertical, in-line multi-cylinder fuel adjustment bolted diesel engine is described 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 projects into the pump housing case (31) on the fuel increase rocking side of the governor lever (38) And the governor lever (38), to limit the swing position of the fuel lever side of the governor lever (38).

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

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

As shown in FIG. 1 (A), the cover (5) has a cap shape.
Fuel limiter (40) further comprises a cap nut (12) covers the tool engagement portion of the adjustment bolt with cap nut (12) (3) (18).
The cap nut (12) is a hexagonal nut screwed to the adjustment bolt (3), and pressed against the lock nut (4) via the second gasket (43) by the fastening force with the adjustment bolt (3) It is done.
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.
If the cover (5) is cap-shaped and the cover (5) can restrict access to the tool engagement portion (18) of the adjustment bolt (3), the cap nut (12) may not necessarily be used.
On the other hand, when the cap nut (12) is used, the cover (5) does not have to be in the form of a cap, and may be in the form of a tube made of only the peripheral wall (5a).

As shown in FIGS. 1 (A), (C) and (D), the retaining means is provided on the collar (7) and the collar (7) which are internally fitted in the peripheral wall (5a) of the cover (5). A bolt mounting wall (10) provided with the fixed pin insertion hole (8), the locking pin (9) inserted through the pin insertion hole (8), and the pin locking portion (10) supported by the adjustment bolt (3) The cover (5) to be pulled out of 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) Is configured as.
According to the above configuration, unlike the invention of Patent Document 1, in addition to the fact that a tool insertion port such as a deformation slit is not formed in the peripheral wall (5a) of the cover (5), the cover is internally fitted with 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 the improper extraction 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 part (10a) provided in the lock nut (4).
For this reason, the cover (5) is firmly held by the adjustment bolt (3) through the lock nut (4), and improper removal of the cover (5) can be prevented.

  As shown in FIGS. 1A and 1D, the lock nut 4 has a diameter smaller than that of the wrench engaging portion 4a and the wrench engaging portion 4a, and is smaller than that of 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 consists of an annular surface.

As shown in FIG. 1 (A), a cap nut (12) screwed to the adjustment bolt (3) and covering 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 held by the adjustment bolt (3) via the cap nut (12), and unauthorized removal of the cover (5) can be prevented.

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

As shown in FIGS. 1 (A), (C) and (D), the lock pin (9) is a lock nut side lock pin (9a) locked to the lock nut side pin lock portion (10a); A cap nut side locking pin (9b) locked to the cap nut side pin locking portion (10b) is provided.
As shown in FIGS. 1 (C) and 1 (D), when viewed in a direction parallel to the axial direction of the adjustment bolt (3), the lock nut side locking pin (9a) and the cap nut side locking pin (9b) , Are directed to cross each other.
According to the above configuration, the cover (5) is unlikely to rattle, a problem in which a tool is inserted into the gap caused by the rattling can be suppressed, and improper removal of the cover (5) can be prevented.

As shown in FIGS. 1C and 1D, a pair of lock nut side locking pins (9a) and a cap nut side locking pin (9b) are provided, 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 (12) It is directed to
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. 1 (A), with the end on the bolt mounting wall (2) side of the peripheral wall (5a) of the cover (5) as the tip, the tip opening edge (13) of the peripheral wall (5a) of the cover (5) , Is in contact with the bolt mounting wall (2).
According to the above configuration, the problem of inserting a tool into these gaps can be suppressed, and improper removal of the cover (5) can be prevented.

As shown in FIGS. 1 (C) and 1 (D), in the locking pin (9) inserted into the pin insertion hole (8), the collar (7) is fitted in the peripheral wall (5a) of the cover (5) Thus, the pin insertion hole (8) is configured to be retained.
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 inside the cover (5) to prevent the locking pin (9) from coming out of the pin insertion hole (8), and the collar (7) and the cover (5) Do not disturb the adjustment of).

  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) for inserting the lock nut side locking pin (9a). And a cap nut side locking pin (8b) provided on the cap nut (12) for inserting the cap nut side locking pin (9b).

The contents of each embodiment of the present invention are as described above, but the present invention is limited to the fuel adjustment bolted diesel engine which adjusts the fuel injection amount of the fuel injection pump with the adjustment bolt as in the above embodiments. It is not a thing.
For example, it can also be used for various hydraulic equipment with an adjustment bolt or an engine with an adjustment bolt, such as a hydraulic pump with an oil amount adjustment bolt in which the oil discharge amount of the hydraulic pump is adjusted with an adjustment bolt.

(1) Female screw hole
(2) Bolt mounting wall
(3) Adjustment bolt
(4) Lock nut
(5) Cover
(5a) Peripheral wall
(7) Color
(8) Pin insertion hole
(9) Locking pin
(9a) Lock nut side locking pin
(9b) Cap nut side locking pin
(10) Pin lock part
(10a) Lock nut side pin lock part
(10b) Cap nut side pin lock part
(11) Tool engagement 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 onto the adjustment bolt (3),
A cover (5) rotatably fitted on the lock nut (4);
In an adjustable bolted instrument provided with retaining means for retaining the cover (5),
The means for preventing
A collar (7) internally fitted on the peripheral wall (5a) of the cover (5) in an interference fit;
A pin insertion hole (8) provided in the collar (7);
A locking pin (9) inserted into the pin insertion hole (8);
A pin lock (10) supported by the adjustment bolt (3);
A cover (5) which is to be pulled out of the lock nut (4) in a direction away from the bolt mounting wall (2) engages with the pin locking portion (10) via the collar (7) and the locking pin (9). Configured to be stopped ,
A device with an adjustment bolt characterized in that the pin locking portion (10) includes a lock nut side pin locking portion (10a) provided on the lock nut (4). In the adjustment bolted apparatus according to claim 1 ,
With a cap nut (12) screwed onto the adjustment bolt (3) and covering the tool engagement (11) of the adjustment bolt (3);
A device with an adjustment bolt characterized in that the pin locking portion (10) also includes a cap nut side pin locking portion (10b) provided on the cap nut (12). In the adjustment bolted apparatus according to claim 2 ,
The lock pin (9) is a lock nut side lock pin (9a) locked to the lock nut side pin lock portion (10a) and a bag locked to the cap nut side pin lock portion (10b) It has a nut side locking pin (9b),
Seeing in a direction parallel to the axial direction of the adjusting bolt (3), the lock nut side locking pin (9a) and the cap nut side locking pin (9b) are oriented in a direction intersecting each other, Adjustment bolted equipment characterized by 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 onto the adjustment bolt (3),
A cover (5) rotatably fitted on the lock nut (4);
In an adjustable bolted instrument provided with retaining means for retaining the cover (5),
The means for preventing
A collar (7) internally fitted on the peripheral wall (5a) of the cover (5) in an interference fit;
A pin insertion hole (8) provided in the collar (7);
A locking pin (9) inserted into the pin insertion hole (8);
A pin lock (10) supported by the adjustment bolt (3);
A cover (5) which is to be pulled out of the lock nut (4) in a direction away from the bolt mounting wall (2) engages with the pin locking portion (10) via the collar (7) and the locking pin (9). Configured to be stopped ,
With a cap nut (12) screwed onto the adjustment bolt (3) and covering the tool engagement (11) of the adjustment bolt (3);
Pin engaging portion (10) is provided with the cap nut side pin engaging portion provided on the cap nut (12) and (10b), the adjustment bolt with equipment, characterized in that. In the adjustment bolted apparatus according to any one of claims 1 to 4,
With the end on the bolt mounting wall (2) side of the peripheral wall (5a) of the cover (5) as the tip,
An adjustable bolted device 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 adjustment bolted apparatus according to any one of claims 1 to 5,
The locking pin (9) inserted into the pin insertion hole (8) is prevented from coming off from the pin insertion hole (8) by the collar (7) being fitted in the peripheral wall (5a) of the cover (5) An apparatus with an adjusting bolt that is configured to

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