JP2017154540A - Dolly for oil rotary vacuum pump and oil rotary vacuum pump unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dolly for an oil rotary vacuum pump which enables easy oil exchange.SOLUTION: A dolly 200 for mounting an oil rotary vacuum pump 10 including a pump body 100 and a driving motor 150 has: a support base 210 for supporting the oil rotary vacuum pump 10; and wheels 220, 230 attached to a lower surface of the support base 210. Further, a jack-up mechanism 300 which brings up an end part of the support base 210 is attached to the dolly 200.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an oil rotary vacuum pump carriage and an oil rotary vacuum pump unit.

  For example, an oil rotary vacuum pump as shown in Patent Document 1 is frequently used to achieve a moderate vacuum pressure because the structure is relatively simple and can be obtained at low cost.

  For example, a glove box is often used when an object sample is placed in an environment filled with a plurality of different gases and the characteristics thereof are examined. When changing the type of gas in the glove box, if the current gas in the glove box is purged with the changed gas, it takes time and a large amount of gas is wasted. For this reason, after the gas that currently fills the inside of the glove box is evacuated and extracted by an oil rotary vacuum pump, a different type of gas is introduced into the glove box.

  In the oil rotary vacuum pump, a predetermined amount of oil is filled in the pump chamber in order to ensure airtightness between the cylinder inner wall and the vane that rotates with the rotor while being in sliding contact with the cylinder inner wall. When the gas in the glove box is evacuated by the oil rotary vacuum pump as described above, the oil in the pump chamber may be contaminated by the gas. Therefore, in the oil rotary vacuum pump, it may be necessary to replace the filled oil when the gas contains harmful substances.

  When changing the oil in the oil rotary vacuum pump, it is necessary to open the discharge port and tilt the entire pump to completely remove the internal oil. It is necessary to tilt and completely remove the cleaning liquid from the discharge port.

  Such oil change work is performed while the operator manually lifts and tilts the end of the oil rotary vacuum pump. However, the oil rotary vacuum pump is relatively heavy and is difficult. there were.

JP-A-8-4676

  The present invention has been conceived under the above-described circumstances, and includes an oil rotary vacuum pump carriage that can perform oil exchange easily, and this truck and an oil rotary vacuum pump mounted thereon. It is an object of the present invention to provide an oil rotary vacuum pump unit.

  In order to solve the above problems, the following technical means were adopted.

  That is, the oil rotary vacuum pump carriage provided by the first aspect of the present invention is a carriage for mounting an oil rotary vacuum pump including a pump body and a drive motor, and supports the oil rotary vacuum pump. And a plurality of wheels attached to the lower surface of the support base, and a jack-up mechanism for lifting the end of the support base is attached.

  In a preferred embodiment, the jack-up mechanism includes a bracket attached to the support base, a grounding member supported so as to be movable in the vertical direction with respect to the bracket, a lowering position and an upper position of the grounding member. An operation mechanism capable of selecting a moving position.

  In a preferred embodiment, the jack-up mechanism has an operation arm that is rotatable with respect to the bracket about a predetermined pivot part, and one end with respect to a first connection part that is different from the pivot part in the manipulation arm. And a link member having the other end rotatably connected to the second connecting portion at the upper end portion of the grounding member.

  In a preferred embodiment, the jack-up mechanism is configured such that when the grounding member assumes the downward movement position, the pivot support portion, the first connection portion, and the second connection portion are arranged in this order from top to bottom. On the other hand, the link member has a square shape, a U shape, or a U shape, and when the grounding member takes the upward movement position, the first connection portion, the pivot portion, and the second connection The parts can be arranged in this order from top to bottom.

  In a preferred embodiment, the plurality of wheels include a first wheel attached to one end portion of the support base and a second wheel attached to the other end portion of the support base, and the first wheel. The distance from the grounding part to the support base is shorter than the distance from the grounding part of the second wheel to the support base, and when the first wheel and the second wheel are grounded, the support base Is configured to be inclined so that one end portion thereof is lowered, and the jack-up mechanism is disposed on one end portion side of the support base, and when the grounding member assumes a downward movement position, the grounding member and the When the second wheel comes in contact with the ground and the support base takes a horizontal posture, the first wheel and the second wheel come in contact with the ground when the grounding member is in the up position. The stand takes an inclined posture in which one end side thereof is lowered.

  In another preferred embodiment, the plurality of wheels include a first wheel attached to one end portion of the support base and a second wheel attached to the other end portion of the support base. When the wheel and the second wheel are in contact with the ground, the support base is configured to take a horizontal posture, the jack-up mechanism is disposed on the other end side of the support base, and the grounding member is When taking the up position, the first and second wheels are grounded and the support base is in a horizontal position, while when the ground member is in the down position, the first wheel and the ground member Is grounded, and the support base is inclined so that one end thereof is lowered.

  In a preferred embodiment, the support base includes an upstanding wall that rises from the outer peripheral edge thereof, and also has a function as an oil pan.

  The oil rotary vacuum pump unit provided by the second aspect of the present invention is an oil rotary vacuum pump that includes a pump main body and a drive motor on the support base for the oil rotary vacuum pump according to the first aspect of the present invention. It is equipped with a vacuum pump.

  In a preferred embodiment, the pump body is located on one end side of the support base, the drive motor is located on the other end side, and an oil discharge port facing the one end side of the support base is provided on the pump body. It has been.

  According to the oil rotary vacuum pump carriage and the oil rotary vacuum pump unit configured as described above, since the support base and the oil rotary vacuum pump mounted thereon can be easily selected by the jack-up mechanism, Oil can be easily discharged from the oil rotary vacuum pump.

  Other features and advantages of the present invention will become more apparent from the detailed description given below with reference to the drawings.

It is a front view of the oil rotary vacuum pump unit concerning a 1st embodiment of the present invention, and shows the state where an oil rotary vacuum pump has taken the horizontal posture. FIG. 2 is a view taken in the direction of the arrow II in FIG. 1 and schematically shows the internal structure of the oil rotary vacuum pump. It is a front view of the oil rotary vacuum pump unit shown in FIG. 1, and shows the state where the oil rotary vacuum pump is in an inclined posture. It is expansion explanatory drawing of the jack up mechanism of the oil rotary vacuum pump unit shown in FIG. 1, and also shows an effect | action. It is a front view of the oil rotary vacuum pump unit concerning a 2nd embodiment of the present invention, and shows the state where the oil rotary vacuum pump has taken the horizontal posture. It is a VI direction arrow view part of FIG. FIG. 6 is a front view of the oil rotary vacuum pump shown in FIG. 5, showing a state where the oil rotary vacuum pump is in an inclined posture. FIG. 6 is an enlarged explanatory view of a jack-up mechanism of the oil rotary vacuum pump unit shown in FIG.

  Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

  1 to 4 show an oil rotary vacuum pump unit A1 according to a first embodiment of the present invention.

  The oil rotary vacuum pump unit A1 includes an oil rotary vacuum pump 10 and a carriage 200 on which the oil rotary vacuum pump 10 is mounted.

  The oil rotary vacuum pump 10 includes a pump main body 100 and a drive motor 150 integrally attached thereto. The oil rotary vacuum pump 10 is a known one, but as schematically shown in FIG. 2, a rotor 111 rotated by a drive motor 150 at an eccentric position in a cylinder 110 having a cylindrical inner surface, and the rotor 111 And a pair of vanes 112 constantly biased outward in the radial direction of the rotor 111. The pair of vanes 112 are in sliding contact with the inner surface of the cylinder 110 and rotate while partitioning the inner space of the cylinder 110. When the rotor 111 and the pair of vanes 112 rotate in the direction of the arrow in FIG. 2, air is drawn into the cylinder 110 from the intake port 113. The rotor 111 and the pair of vanes 112 further rotate in the direction of the arrow in the figure, whereby air is discharged from the exhaust port 114. By repeating such an operation, the suction port 113 side becomes a vacuum pressure. The intake port 113 communicates with an external intake port 115 provided, for example, at the top of the pump body 100, and exhaust from the exhaust port 114 is further preferably transmitted from, for example, an external exhaust port 116 provided at the top of the pump body 100. Is discharged through a filter. The external intake port 115 is connected to a space (for example, a glove box) to which a vacuum pressure is to be applied via a duct that can withstand the vacuum pressure.

  The outside of the cylinder 110 is an oil reservoir 120, and this oil 121 is guided to a bearing portion and an oil guide groove (both not shown) by an oil pump (not shown) operated by a drive motor 150, and the oil reservoir 120. Cycle to return to. A part of the oil 121 serves as a seal for preventing air leakage from the cylinder 110 and also assists a seal between the pair of vanes 112 and the inner surface of the cylinder 110. The oil 121 in the oil reservoir 120 can be extracted by opening the valve 131 of the discharge port 130 provided below the side of the pump body 100.

  The carriage 200 includes a support base 210, a first wheel 220, a second wheel 230, and a jack-up mechanism 300.

  The support base 210 has the oil rotary vacuum pump 10 fixedly mounted on the upper surface thereof. In the present embodiment, the support base 210 has a bottom plate 211 and an upright wall 212 that rises from the periphery of the bottom plate. It also serves as an oil pan that receives oil leaking from the pump body 100 without spilling it onto the floor F. In the present embodiment, the support base 210 is rotated with oil so that the pump body 100 is positioned on one end side (left side in FIG. 1) and the drive motor 150 is positioned on the other end side (right side in FIG. 1). A vacuum pump 10 can be mounted.

  A pair of left and right first wheels 220 are provided on the lower surface on one end side of the support base 210. A pair of second wheels 230 are provided on the lower surface on the other end side of the support base 210. The first wheel 220 is a fixed type that does not rotate around the vertical axis. On the other hand, the 2nd wheel 230 is attached to the lower surface of the support stand 210 via the bracket 240, and the thing of the type rotated around a vertical axis is used. As clearly shown in FIGS. 1 and 3, the distance H <b> 1 from the ground contact portion 221 of the first wheel 220 to the support base 210 is greater than the distance H <b> 2 from the ground contact portion 231 of the second wheel 230 to the support base 210. Therefore, when the first wheel 220 and the second wheel 230 are in contact with the floor F, the support base 210 or the oil rotary vacuum pump 10 is arranged so that one end side of the support base 210 is lowered. Tilt.

  The jack-up mechanism 300 is disposed on one end side of the support base 210 and has a function of lifting the one end side of the support base 210 as necessary. The bracket 310 attached to the support base 210 and the bracket 310 On the other hand, a grounding member 320 supported so as to be movable in the vertical direction is provided, and a downward movement position and an upward movement position of the grounding member 320 can be selected.

  The bracket 310 has a vertical wall 311 fixed to one side surface of the support base 210 and a horizontal wall 312 extending from the bottom of the vertical wall to the side, and is substantially in rear view (FIG. 2). It is an L-shaped member. The grounding member 320 is a rod-shaped member, and is supported by a boss portion 313 provided on the horizontal wall 312 of the bracket 310 so as to be capable of reciprocating in the vertical axis direction. When the grounding member 320 is in the down position, the grounding member 320 is grounded to the floor F to lift one end of the support base 210 so that the support base 210 or the oil rotary vacuum pump 10 can take a horizontal posture. The length and the arrangement position in the vertical direction are set. The jack-up mechanism 300 also has an operation arm 360 that can be rotated around a predetermined pivot 330 with respect to the vertical wall 311 of the bracket 310, and a first connecting portion 341 that is different from the pivot 330 in the operation arm 360. And a link member 350 having one end pivotably connected to the second connecting portion 342 at the upper end of the ground member 320 and the other end pivotably connected.

  As shown in FIGS. 1 and 4 (b), when the grounding member 320 is in the downward movement position, the jack-up mechanism 300 has the pivotal support portion 330, the first connecting portion 341, and the second connecting portion 342 from above. As shown in FIG. 3 and FIG. 4A, when the grounding member 320 takes the upward movement position, the first connecting portion 341, the pivotal support portion 330, and the second connecting portion 342 are arranged in this order downward. It is configured so that it can be arranged in this order from top to bottom. The link member 350 has a U-shape, a U-shape or a U-shape so that the jack-up mechanism 300 does not interfere with the pivot portion 330 when the jack-up mechanism 300 takes the state shown in FIGS. 3 and 4A. Presents. Further, in the state of FIGS. 3 and 4A in which the grounding member 320 takes the upward movement position and the state of FIGS. 1 and 4B in which the grounding member 320 assumes the downward movement position, the operation arm is concerned. In order to prevent the 360 from inadvertently interfering with the pump main body 100 or extending backward, it has a shape bent in an L shape. Further, as shown in FIG. 2, the jack-up mechanism 300 is provided in a pair of left and right, and the left and right operation arms 360 are integrated by a connecting rod extending in the lateral direction, and can be simultaneously rotated. ing.

  Next, the operation of the oil rotary vacuum pump unit A1 will be described.

  As shown in FIG. 1 and FIG. 4B, when the jack-up mechanism 300 selects the lowering position of the grounding member 320, the second wheel 230 and the grounding member 320 are grounded to the floor F. The support base 210 or the oil rotary vacuum pump 10 mounted on the support base 210 takes a horizontal posture. In this state, the oil rotary vacuum pump 10 is operable.

  In this state, since the lower end of the grounding member 320 is in frictional contact with the floor F, the oil rotary vacuum pump unit A functions as a stopper so that the oil rotary vacuum pump unit A does not move carelessly with respect to the floor F.

  On the other hand, as shown in FIG. 3 and FIG. 4A, when the jack-up mechanism 300 selects the upward movement position of the grounding member 320, the lower end of the grounding member 320 is lower than the lower end of the first wheel 220. The first wheel 220 and the second wheel 230 are both in contact with the floor F. At this time, the support base 210 and the oil rotary vacuum pump 10 mounted thereon are inclined so that one end portion side of the support base 210, that is, the side on which the pump main body 100 is located is low. At this time, the oil discharge port 130 provided in the pump main body 100 faces rearward (in the direction of one end of the support base 210) at a low position in the rear portion of the pump main body 100. By opening the, the oil in the pump body 100 can be naturally discharged by gravity.

  3 and 4A, the grounding member 320 does not contact the floor F, and the first wheel 220 and the second wheel 230 are grounded. Therefore, the oil rotary vacuum pump unit A1 is The oil can be easily moved to the place where it should be discarded.

  As described above, the oil rotary vacuum pump unit A1 according to the present embodiment can easily perform the oil discharging operation that has been troublesome in the past in replacing the oil.

  5 to 8 show an oil rotary vacuum pump unit A2 according to a second embodiment of the present invention. In these drawings, the same or equivalent members or portions as those of the oil rotary vacuum pump unit A1 according to the first embodiment shown in FIGS. 1 to 4 are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

  The oil rotary vacuum pump unit A2 according to the present embodiment includes a carriage 200 on which the same oil rotary vacuum pump 10 as that of the first embodiment is mounted. The configuration of the carriage 200 is the same as that of the first embodiment as follows. Different.

  That is, the first wheel 220 attached to one end side of the support base 210 and the second wheel 230 attached to the other end side have the same distance from the grounding portion to the support base 210, When the first wheel 220 and the second wheel 230 are grounded, the support base 210 is configured to take a horizontal posture.

  The jack-up mechanism 300 has substantially the same configuration as that described in the first embodiment, but is the other end of the support base 210 on the opposite side of the support base 210 from the first embodiment. It is attached to the part side, that is, the side where the drive motor 150 is disposed. Accordingly, when the grounding member 320 is in the downward movement position, the jack-up mechanism 300 lifts the other end portion side of the support base 210 by the grounding member 320 being grounded, and the support base 210 is moved to the one end side thereof. It is comprised so that it may incline so that the other end part side may become a high rank.

  The bracket 310 includes a vertical wall 311 fixed to the side surface on the other end side of the support base 210, and a horizontal wall 312 extending from the bottom of the vertical wall toward the side. In a front view (FIG. 6), This is a substantially L-shaped member. The grounding member 320 is a rod-shaped member, and is supported by a boss portion 313 provided on the horizontal wall 312 of the bracket 310 so as to be capable of reciprocating in the vertical axis direction. Further, when the grounding member 320 takes the down position, the other end side of the support base 210 is lifted by grounding to the floor F, and the support base 210 or the oil rotary vacuum pump 10 is connected to the other end side of the other end side. The length and the arrangement position in the vertical direction are set so that the inclined posture can be taken so that the part side is higher. The jack-up mechanism 300 also has an operation arm 360 that can be rotated around a predetermined pivot 330 with respect to the vertical wall 311 of the bracket 310, and a first connecting portion 341 that is different from the pivot 330 in the operation arm 360. And a link member 350 having one end pivotably connected to the second connecting portion 342 at the upper end of the ground member 320 and the other end pivotably connected.

  As shown in FIG. 7 and FIG. 8B, when the grounding member 320 is in the downward movement position, the jack-up mechanism 300 has the pivot portion 330, the first connecting portion 341, and the second connecting portion 342 from above. As shown in FIG. 5 and FIG. 8A, when the grounding member 320 takes the upward movement position, the first connecting portion 341, the pivotally supporting portion 330, and the second connecting portion 342 are arranged in this order downward. It is configured so that it can be arranged in this order from top to bottom. The link member 350 has a U-shape, a U-shape or a U-shape so that the jack-up mechanism 300 does not interfere with the pivot portion 330 when the jack-up mechanism 300 takes the state shown in FIGS. 5 and 8A. Presents. Further, in the state of FIGS. 5 and 8A in which the grounding member 320 takes the upward movement position, and the state of FIGS. 5 and 8B in which the grounding member 320 assumes the downward movement position, the operation arm 360 is operated. Is bent in an L shape so that it does not inadvertently interfere with the pump body 100 or extend backward. Further, as shown in FIG. 5, the jack-up mechanism 300 is provided in a pair of left and right, and the left and right operation arms 360 are integrated by a connecting rod extending in the lateral direction so that they can be simultaneously rotated. ing.

  Next, the operation of the oil rotary vacuum pump unit A2 will be described.

  As shown in FIG. 5 and FIG. 8A, when the jack-up mechanism 300 selects the upward movement position of the grounding member 320, both the first wheel 220 and the second wheel 230 are on the floor F. Ground. At this time, the support base 210 and the oil rotary vacuum pump 10 mounted thereon take a horizontal posture. In this state, the oil rotary vacuum pump 10 is operable.

  On the other hand, as shown in FIG. 7 and FIG. 8B, when the jack-up mechanism 300 selects the downward movement position of the grounding member 320, the lower end of the grounding member 320 that contacts the floor F is the second wheel. As a result, the other end side of the support base 210 is lifted. Thereby, the support stand 210 and the oil rotary vacuum pump 10 mounted thereon are inclined so that one end portion side of the support stand 21, that is, the side where the pump main body 100 is located is low. At this time, the oil discharge port 130 provided in the pump main body 100 faces rearward (in the direction of one end of the support base 210) at a low position in the rear portion of the pump main body 100. By opening the, the oil in the pump body 100 can be naturally discharged by gravity.

  As described above, also in the oil rotary vacuum pump unit A2 of the present embodiment, the oil discharge operation that has been conventionally troublesome in the oil replacement can be easily performed.

  Of course, the present invention is not limited to the above-described embodiments, and all modifications within the scope of the matters described in the claims are all included in the scope of the present invention.

A1 Oil rotary vacuum pump unit A2 Oil rotary vacuum pump unit F Floor 10 Oil rotary vacuum pump 100 Pump body 110 Cylinder 111 Rotor 112 Vane 113 Intake port 114 Exhaust port 115 External intake port 116 External exhaust port 120 Oil reservoir 121 Oil 130 Exhaust port 131 Valve 150 Drive motor 200 Carriage 210 Support base 211 Bottom plate 212 Standing wall 220 First wheel 221 Grounding part 230 Second wheel 231 Grounding part 240 Bracket 300 Jack-up mechanism 310 Bracket 311 Vertical wall 312 Horizontal wall 313 Boss part 320 Grounding member 330 Pivoting portion 341 First connecting portion 342 Second connecting portion 350 Link member 360 Operating arm 370 Connecting rod

Claims (9)

A carriage for mounting an oil rotary vacuum pump including a pump body and a drive motor,
A jack-up mechanism for supporting the oil rotary vacuum pump and a plurality of wheels attached to the lower surface of the support base and lifting an end of the support base is attached. A dolly for an oil rotary vacuum pump.   The jack-up mechanism can select a bracket attached to the support base, a grounding member supported so as to be movable in the vertical direction with respect to the bracket, and a downward movement position and an upward movement position of the grounding member. An oil rotary vacuum pump carriage according to claim 1, comprising an operation mechanism.   The jack-up mechanism is connected to an operation arm that can rotate with respect to the bracket around a predetermined pivotal support, and one end pivotably connected to a first connection part that is different from the pivotal support in the operation arm. The oil rotary vacuum pump carriage according to claim 2, further comprising: a link member whose other end is rotatably connected to the second connecting portion at the upper end portion of the grounding member.   In the jack-up mechanism, when the grounding member assumes the downward movement position, the pivot support portion, the first connection portion, and the second connection portion are arranged in this order from top to bottom, while the link The member has a U-shape, a U-shape, or a U-shape, and when the grounding member takes the upward movement position, the first connection portion, the pivot support portion, and the second connection portion are from the top to the bottom. The dolly for an oil rotary vacuum pump according to claim 3, which can be arranged in this order toward. The plurality of wheels include a first wheel attached to one end portion of the support base and a second wheel attached to the other end portion of the support base, and the support from the grounding portion of the first wheel. The distance to the base is shorter than the distance from the ground contact portion of the second wheel to the support base. When the first wheel and the second wheel are grounded, the support base has a low end. Configured to be inclined,
The jack-up mechanism is disposed on one end side of the support base, and when the grounding member is in the downward movement position, the grounding member and the second wheel are grounded, and the support base is in a horizontal posture. On the other hand, when the grounding member is in the upward movement position, the first wheel and the second wheel are grounded, and the support base takes an inclined posture in which one end thereof is lowered. The trolley | bogie for oil rotary vacuum pumps in any one of thru | or 4. The plurality of wheels include a first wheel attached to one end portion of the support base and a second wheel attached to the other end portion of the support base, wherein the first wheel and the second wheel are When grounded, the support is configured to take a horizontal position,
The jack-up mechanism is disposed on the other end side of the support base, and when the grounding member is in the up position, the first and second wheels are grounded and the support base is in a horizontal posture. 5. On the other hand, when the grounding member is in the downward movement position, the first wheel and the grounding member are grounded, and the support base takes an inclined posture in which one end side thereof is lowered. Cradle for oil rotary vacuum pump according to crab.   The dolly for an oil rotary vacuum pump according to any one of claims 1 to 6, wherein the support base is provided with a standing wall rising from an outer peripheral edge thereof, and also has a function as an oil pan.   An oil rotary vacuum pump comprising a pump main body and a drive motor mounted on the support base of the oil rotary vacuum pump carriage according to any one of claims 1 to 7. Pumping unit.   The pump main body is located on one end side of the support base, the drive motor is located on the other end side, and the pump main body is provided with an oil discharge port facing the one end side direction of the support base. 9. An oil rotary vacuum pump unit according to 8.

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