JP5455785B2 - Vacuum pump support structure - Google Patents

Description

  The present invention relates to a vacuum pump support structure.

  Exhaust brakes have been conventionally known in which the exhaust pipe is narrowed during braking to increase exhaust resistance and the engine brake effect is enhanced by causing the engine to perform piston compression even during the exhaust stroke. Some small trucks, etc., perform the operation of narrowing the exhaust brake flow path using negative pressure air.

  That is, a negative pressure tank mounted at an appropriate position on the vehicle and connected to the exhaust brake is connected by a pipe, and the exhaust brake is operated by applying the negative pressure of the negative pressure tank. The negative pressure tank is depressurized by a vacuum pump supported by a vehicle frame via a bracket.

  In the vacuum pump, the exhaust port for discharging the air sucked from the negative pressure tank is constituted by a check valve, and the check valve is opened only when exhausting so as to prevent the backflow of the atmosphere to the negative pressure tank side. It has become.

  As prior art document information related to this type of vacuum pump, there is Patent Document 1 below.

JP 2009-257284 A

  However, in such a conventional vacuum pump, the check valve is filled with snow accumulated on the bracket in a cold region, etc., or after being wetted by rain or splash water, the above check is performed due to a decrease in the outside air temperature. The valve is frozen and cannot be opened and closed, which may cause exhaust gas to not be discharged and cause the vacuum pump to malfunction.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vacuum pump support structure that can reliably avoid a malfunction due to freezing of an exhaust port of a vacuum pump even when used in a cold district or the like.

  The present invention has a structure in which a vacuum pump is supported on a frame of a vehicle via a bracket, and an exhaust port of the vacuum pump is disposed on the installation floor with respect to the installation floor supported in a shelf shape by the bracket. The vacuum pump is fixed, and an opening for preventing snow accumulation is formed in the installation floor so as to surround the exhaust port in a plan view while leaving a seating surface directly below the exhaust port, and the exhaust port is provided on the vacuum pump side. A protective cover having a lower opening that covers the periphery of the protective cover is provided, and the coverage of the protective cover in plan view is set larger than the remaining seating surface of the installation floor.

  Thus, since the periphery of the exhaust port of the vacuum pump is covered with the protective cover and the bottom of the exhaust port is also shielded against the road surface by the remaining seating surface of the installation floor, It is possible to prevent the mouth from being buried in snow and getting wet with rain water or splash water, thereby preventing the exhaust port from freezing and preventing the vacuum pump from malfunctioning.

  In addition to simply covering the periphery of the exhaust port with a protective cover and the remaining seating surface of the installation floor, an opening is formed on the installation floor so as to surround the exhaust port in plan view, and the protective cover is viewed in plan view. Since the covering area is set to be larger than the remaining seating surface of the installation floor, it is reliably avoided that snow accumulates around the protective cover, and the communication between the protective cover and the outside air is impaired by the snow accumulation. Is prevented.

  That is, if an opening is formed in the installation floor so as to surround the exhaust port in a plan view, snow does not accumulate at the location of the opening, and the covering range of the protective cover in a plan view is set as the remaining area of the installation floor. If it is set larger than the seating surface, the seating surface will not protrude from the outer periphery of the lower end of the protective cover, and snow will not accumulate, and the gap between the lower end of the protective cover and the installation floor will be blocked by snow, and the vacuum pump exhaust The situation that will cause trouble will not occur.

  Furthermore, in carrying out the present invention more specifically, for example, an exhaust opening passage that is formed in a mountain shape so that rainwater can easily flow down on both sides of the protective cover and has an upward slope on both sides toward the top of the mountain shape. In this way, even if a situation occurs where the gap between the lower end of the protective cover and the installation floor is blocked by icing or the like, the two exhaust opening flow paths This ensures the communication between the protective cover and the outside air.

  Moreover, the accumulation of rainwater at the top of the protective cover is prevented by the mountain shape at the top of the protective cover, and rainwater and splashing water that has jumped into each exhaust opening channel due to the upward slope toward the top of the mountain shape of each exhaust opening channel. As the splashes flow back out of the protective cover, the opportunity for water to enter the protective cover is eliminated.

  According to the vacuum pump support structure of the present invention described above, various excellent effects as described below can be obtained.

  (I) By covering the periphery of the exhaust port of the vacuum pump with a protective cover or the remaining seating surface of the installation floor, the exhaust port may be filled with snow or wet with rain water or splash water. Therefore, even when used in cold regions, malfunctions due to freezing of the exhaust port of the vacuum pump can be reliably avoided, and snow can be avoided around the protective cover by the opening. It is also possible to prevent the communication between the protective cover and the outside air from being damaged by snow.

  (II) If a configuration in which the upper part of the protective cover is formed in a mountain shape so that rainwater can easily flow down and an exhaust opening passage that forms an upward slope toward the top of the mountain shape is formed on both sides of the protective cover, Even if the gap between the lower end and the installation floor is blocked by icing, etc., the communication between the protective cover and the outside air can be ensured by the two exhaust opening flow paths, It is also possible to prevent the exhaust port from freezing by eliminating the opportunity for water to enter the protective cover.

It is a side view which shows an example of the form which implements this invention. It is an arrow view of the II-II direction of FIG. It is an arrow view of the III-III direction of FIG. It is a perspective view of the vacuum pump of FIG. It is a front view of the protective cover of FIG. FIG. 6 is an arrow view in the VI-VI direction of FIG. 5. It is an arrow view of the VII-VII direction of FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 to 7 show an example of an embodiment for carrying out the present invention. As shown in FIG. 1, in this embodiment, the installation floor 3 is supported in a shelf shape by a bracket 2 attached to a frame 1 of a vehicle. The vacuum pump 4 is fixed so that the check valve 5 (exhaust port) of the vacuum pump 4 is disposed on the installation floor 3 with respect to the installation floor 3, and in the illustrated example, the vacuum pump 4 is fixed. The pump 4 is in a state of lying on the vehicle width direction (left and right direction in FIG. 1), and the check valve 5 is fixed on the installation floor 3 toward the inner side (left side in FIG. 1) in the vehicle width direction.

  Here, in the installation floor 3, an opening 6 for preventing snow accumulation is formed in a U shape so as to surround the check valve 5 in a plan view, leaving a seat surface 3a immediately below the check valve 5. A protective cover 7 having a lower opening that covers the periphery of the check valve 5 is provided on an end surface of the vacuum pump 4 facing inward in the vehicle width direction. As shown in FIGS. 2 and 3, the protective cover 7 is seen in a plan view. Is set to be larger than the remaining seating surface 3 a of the installation floor 3.

  The details of the protective cover 7 are as shown in FIGS. 4 to 7. The exhaust cover is formed in a mountain shape so that rainwater can easily flow down, and on both sides of the protective cover 7, the exhaust open flow forms an upward slope toward the top of the mountain shape. A path 8 is formed, and flanges 9 for attaching to the end face of the vacuum pump 4 are formed at the four corners.

  In the figure, reference numeral 10 denotes a suction pipe connected to a negative pressure tank (not shown), and 11 denotes an L-shaped rib for reinforcing the installation floor 3.

  Thus, in this way, the periphery of the check valve 5 of the vacuum pump 4 is covered with the protective cover 7, and the road surface side is also shielded immediately below the check valve 5 by the remaining seat surface 3 a of the installation floor 3. As a result, the check valve 5 is prevented from being buried in snow or wet with rain water or splash water, thereby preventing the check valve 5 from freezing and causing the vacuum pump 4 to malfunction. Will not occur.

  Further, not only is the periphery of the check valve 5 covered with the protective cover 7 or the remaining seating surface 3a of the installation floor 3, but the U-shaped opening is formed on the installation floor 3 so as to surround the check valve 5 in plan view. 6 and the covering range in plan view of the protective cover 7 is set larger than the remaining seating surface 3a of the installation floor 3, so that it is reliably avoided that snow is accumulated around the protective cover 7, It is possible to prevent a situation in which the communication between the protective cover 7 and the outside air is impaired due to snow accumulation.

  In other words, if the U-shaped opening 6 is formed on the installation floor 3 so as to surround the check valve 5 in a plan view, snow does not accumulate at the position where the opening 6 is present, and the protective cover 7 in a plan view. If the covering range is set to be larger than the remaining seating surface 3a of the installation floor 3, the seating surface 3a does not protrude from the outer periphery of the lower end of the protection cover 7 and snow does not accumulate, and the lower end of the protection cover 7 and the installation floor 3 As a result, the gap between the two is blocked by snow and the exhaust of the vacuum pump 4 is hindered.

  Furthermore, even if a situation occurs in which the gap between the lower end of the protective cover 7 and the installation floor 3 is blocked by icing or the like, the communication between the protective cover 7 and the outside air is established by the two exhaust opening passages 8. Moreover, the accumulation of rainwater on the upper part of the protective cover 7 is prevented by the chevron at the upper part of the protective cover 7, and the upward slope toward the top of the chevron of each exhaust opening flow path 8 Since the splashes of rainwater and splashing water that have jumped into the exhaust opening flow path 8 flow back out of the protective cover 7, the opportunity for water to enter the protective cover 7 is eliminated.

  Therefore, according to the above-described embodiment, the check valve 5 of the vacuum pump 4 is covered with the protective cover 7 and the remaining seating surface 3a of the installation floor 3, so that the check valve 5 is buried with snow, rainwater, Since it is possible to prevent splashing water from getting wet, it is possible to reliably avoid malfunction caused by freezing of the check valve 5 of the vacuum pump 4 even when used in cold districts, etc. It is possible to surely prevent snow from being accumulated around the protective cover 7 by the shape of the opening 6, and it is possible to prevent the communication between the protective cover 7 and the outside air from being impaired by the snow accumulation.

  Further, if a configuration is adopted in which the upper part of the protective cover 7 is formed in a mountain shape so that rainwater can easily flow down and the exhaust opening flow path 8 is formed on both sides of the protective cover 7 so as to rise toward the top of the mountain shape. Even if a situation occurs in which the gap between the lower end of 7 and the installation floor 3 is blocked by icing or the like, the communication between the protective cover 7 and the outside air should be ensured by the two exhaust opening flow paths 8. In addition, it is possible to prevent the check valve 5 from freezing by eliminating the opportunity for water to enter the protective cover 7.

  Note that the vacuum pump support structure of the present invention is not limited to the above-described embodiment. The protective cover may have a shape other than the illustrated example. What is necessary is just to form as needed, and also the opening part for snow accumulating may be formed in V shape etc. other than making it U shape, and in the range which does not deviate from the gist of the present invention. Of course, various changes can be made.

1 Frame 2 Bracket 3 Installation floor 3a Seating surface 4 Vacuum pump 5 Check valve (exhaust port)
6 Opening 7 Protective cover 8 Exhaust release channel

Claims (2)

  The vacuum pump is supported by a frame of a vehicle via a bracket, and the vacuum pump is disposed so that an exhaust port of the vacuum pump is disposed on the installation floor with respect to the installation floor supported in a shelf shape by the bracket. In addition to fixing, an opening for preventing snow accumulation is formed in the installation floor so as to surround the exhaust port in a plan view while leaving a seating surface directly below the exhaust port, and covers the periphery of the exhaust port on the vacuum pump side A vacuum pump support structure, characterized in that a protective cover for the lower opening is provided and a covering range of the protective cover in plan view is set to be larger than the remaining seating surface of the installation floor.   2. The vacuum pump according to claim 1, wherein an upper part of the protective cover is formed in a mountain shape so that rainwater can easily flow down, and an exhaust opening passage is formed on both sides of the protective cover so as to rise toward the top of the mountain shape. Support structure.

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