JP2010065619A - Grease pump device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve versatility by allowing to attach/detach discharge parts to/from a base body and use only a desired number of the discharge parts. <P>SOLUTION: This grease pump device is equipped with: the base body 1 including a storage chamber 2 for storing grease, and a communication port part 4 communicated with the storage chamber 2; and the discharge part 10 communicated with the storage chamber 2 of the base body 1 and including a suction port 11 for sucking the grease, a discharge port 12 for discharging the grease, and a discharge part body 14 including a cylinder chamber 13 for storing the sucked grease; a piston 20 advanceably/retreatably provided with respect to the cylinder chamber 13 of the discharge part 10 for making the grease in the cylinder chamber 13 to be discharged from the discharge port 12 when advancing by pushing out the grease, and making the grease in the storage chamber 2 to be sucked from the suction port 11 when retreating; and a drive part 30 for advancing/retreating the piston 20. A blocking body 40 is made attachable equipped with a plurality of sets of the discharge part 10 and the piston 20, which allows the discharge parts 10 to be attached/detached to/from the base body 1, and allows the piston 20 to be freely movable in the communication port part 4 when the discharge part 10 is detached from the communication port part 4. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a grease pump device that supplies grease to machine tools, industrial machines, and the like, and more particularly, to a grease pump device that includes a plurality of discharge ports that discharge grease.

  Conventionally, as this type of grease pump device, for example, one described in Patent Document 1 (WO 2005/1088849) is known. As shown in FIG. 9, this grease pump device Sa includes a base body 100 having a storage chamber 101 in which a grease tank Ta to which grease is filled is attached and the grease from the grease tank Ta flows in and the supplied grease is stored. A suction port 111 that is provided integrally with the base body 100, communicates with the storage chamber 101 of the base body 100, and sucks the grease from the storage chamber 101 and discharge port 112 that discharges the grease. 112 is provided between a discharge portion 110 having a cylinder chamber 113 for storing grease from the suction port 111 and the cylinder chamber 113 of the discharge portion 110 so as to be movable back and forth. The grease is pushed out and discharged from the discharge port 112, and the grease in the storage chamber 101 is discharged from the suction port 111 into the cylinder chamber 113 when leaving. A piston 120 and to be taken, provided with a driving section 130 for the piston 120 is moved back and forth, a set of the discharge portion 110 and the piston 120 is the axis 121 of each piston 120 is configured to include a plurality of sets in parallel.

  When the grease tank Ta is attached to the base body 100 of the grease pump device Sa, the grease flows into the storage chamber 101 from the grease tank Ta and is stored. In this state, when each piston 120 is moved in the retreat direction by the drive unit 130, the grease stored in the storage chamber 101 is sucked into the cylinder chamber 113 from the suction port 111 and sucked. Grease is stored in each cylinder chamber 113. After the grease is stored in each cylinder chamber 113, when each piston 120 is moved in the advance direction by the drive unit 130, each piston 120 enters each cylinder chamber 113 and the grease in each cylinder chamber 113 is pushed out. Thus, grease is discharged from each discharge port 112. Thereby, since the grease can be discharged by the amount stored in the cylinder chamber 113, a predetermined amount of grease can be discharged. Moreover, since the discharge part 110 is provided with two or more, grease can be discharged to several places at once, Therefore Oil supply efficiency improves.

WO2005 / 1088849

  However, this conventional grease pump device Sa cannot close the discharge port 112 of the discharge unit 110 that is not desired to be used, and therefore, there is a problem that the required number of discharge units 110 cannot be used. It was. The reason is that when the discharge port 112 of the discharge part 110 that is not desired to be used is closed, the discharge part 110 is provided integrally with the base body 100, and therefore, in the closed discharge part 110, the piston 120 is placed in the cylinder chamber 113. This is because the volume of the cylinder chamber 113 cannot be changed by entering, and the grease cannot be pushed out and discharged, so that the piston 120 is stopped and the apparatus is broken.

  The present invention has been made in view of such problems, and is a grease pump device that improves versatility by allowing a discharge unit to be attached to and detached from a base body and using a desired number of discharge units. The purpose is to provide.

  In order to achieve such an object, a grease pump device according to the present invention is provided with a base body having a storage chamber in which a grease tank filled with grease is attached and the grease from the grease tank flows in and accommodates the inflowed grease. A suction port that is provided in the base body and communicates with the storage chamber of the base body to suck grease from the storage chamber and a discharge port that discharges the grease, and is provided between the suction port and the discharge port. A discharge part having a cylinder chamber for storing grease from the suction port, and a cylinder part of the discharge part, which is provided so as to be able to move forward and backward. A piston for sucking grease in the storage chamber from the suction port into the cylinder chamber; and a drive unit for moving the piston forward and backward. In the grease pump device provided with a plurality of sets so that the axes of the pistons are parallel to each other, the discharge portion has a suction port at one end and a discharge port at the other end, and a cylinder chamber between the suction port and the discharge port. A discharge portion main body having a male screw is formed on one outer side of the discharge portion main body, and a female screw is formed on one side surface of the base body. A communication port portion is provided, the discharge portion is detachably attached to the base body by screwing and unscrewing of the male screw of the discharge portion main body with respect to the female screw of the base body, and the discharge portion is connected to the communication port portion. It is configured such that when it is removed from the communication port portion, a closing body that can be screwed into the communication port portion so that the piston can move freely in the communication port portion can be attached.

  Thereby, when discharging grease with this grease pump device, first, each piston is moved in the retreat direction by the drive unit. In this case, the grease stored in the storage chamber is sucked into each cylinder chamber from the suction port, and the sucked grease is stored in each cylinder chamber. Next, after grease is stored in each cylinder chamber, when each piston is moved in the advance direction by the drive unit, each piston enters into each cylinder chamber, the grease in each cylinder chamber is pushed out, and each discharge port The grease is discharged from. Thereby, since the grease can be discharged by the amount stored in the cylinder chamber, a predetermined amount of grease can be discharged. In addition, since a plurality of discharge portions are provided, grease can be discharged to a plurality of locations at a time, thereby improving the lubrication efficiency.

  In addition, when grease is to be discharged to a location that is smaller than the number of discharge units provided in this device, remove the discharge unit body that you do not want to use from the base body, and screw the closure body into the removed communication port. Install. Then, when the piston is advanced and retracted by the drive unit in the same manner as described above, the grease is discharged only from the discharge port of the discharge unit main body, and the grease is not discharged from the closing body. At this time, since the piston corresponding to the closed body floats in the communication port portion, the piston can move back and forth even if grease is not discharged, so that it is possible to prevent a situation such as failure of the device. it can. That is, since the discharge part main body and the closed body can be replaced with the base body, a desired number of discharge parts can be used, and thus versatility is improved.

  Then, if necessary, an elastic ring on which the piston slides is fitted inside the discharge port side of the discharge part, and only discharge of grease from the cylinder chamber is allowed inside the discharge port side of the discharge part. The check valve is provided. Thus, after the grease is stored in the cylinder chamber, when the piston enters the cylinder chamber, the grease is pushed out by the piston, the check valve is opened by the pressure, and the grease is discharged from the discharge port. Further, when the piston moves out of the cylinder chamber, the check valve is closed to prevent the grease from flowing back into the cylinder chamber from the discharge port. Further, since the elastic ring is fitted inside the suction port side, when the piston moves forward and backward, the piston slides on the elastic ring, and the cylinder chamber is sealed by the piston and the elastic ring. It is possible to prevent the grease from leaking from the inlet.

  Further, if necessary, the plurality of pistons are movably supported in sliding holes formed on the other side surface of the base body so that the axis thereof penetrates the storage chamber and enters the communication port. It is said. Thereby, since a piston is supported by the base body side, a discharge part main body and a piston become a different body, Therefore, replacement | exchange of a discharge part main body and a closure body becomes easy.

  Further, if necessary, the drive unit includes a plate-like member to which the base ends of the plurality of pistons are attached, a spring for urging the plate-like member in the advancing direction of the piston, and the spring during excitation. And a solenoid that pulls the plate-like member against the urging force of the piston and moves the plate-like member in the advancing direction of the piston by the urging force of the spring when de-excited. . Accordingly, when the solenoid is energized and excited, the plate member is pulled and moved in the retracting direction of the piston by the solenoid. When the energization of the solenoid is stopped and de-energized, the plate-like member moves in the piston advance direction by the biasing force of the spring. At this time, since a plurality of pistons are attached to one plate-like member, the plurality of pistons advance and retreat simultaneously by the advance and retreat of the plate-like member. That is, since a plurality of pistons can be moved back and forth at a time, the drive unit can be simply configured.

  Furthermore, it is set as the structure which provided the detection apparatus which detects the advancing / retreating operation | movement of the said plate-shaped member as needed. Thereby, since advance / retreat of a piston is detected each time, it can recognize that grease is discharged reliably. Further, since the plurality of pistons are attached to one plate-like member, all pistons can be detected at a time by detecting the forward / backward movement of the plate-like member. Furthermore, when the number of times the plate member is moved back and forth is accumulated, the amount of grease discharged at one time is constant, so the total amount of grease discharged can be recognized. From this, the remaining amount of grease in the grease tank can be recognized. Can be recognized.

  According to the grease pump device of the present invention, the piston is moved in the retracting direction to store the grease in the cylinder chamber of the discharge unit, and then the piston is moved in the advance direction to enter the cylinder chamber of the discharge unit. The grease is pushed out and discharged from the discharge port. There are multiple pairs of pistons and discharge parts of this device. When grease is discharged to a place smaller than the number of discharge parts, remove the discharge part body that you do not want to use from the base body and attach the closure body. . Then, when the piston is advanced and retracted by the drive unit in the same manner as described above, the grease is discharged only from the discharge port of the discharge unit main body, and the grease is not discharged from the closing body. At this time, since the piston corresponding to the closed body floats in the communication port portion, the piston can move back and forth even if grease is not discharged, so that it is possible to prevent a situation such as failure of the device. it can. That is, since the discharge part main body and the closed body can be replaced with the base body, a desired number of discharge parts can be used, and thus versatility is improved.

Hereinafter, a grease pump device according to an embodiment of the present invention will be described with reference to the accompanying drawings.
1 to 7 show a grease pump device S according to an embodiment of the present invention. A grease tank T as shown in FIG. 2 is attached to the grease pump device S. The grease tank T is filled with grease, and includes a container body 50 and an attachment port 51.

  The grease pump device S according to the embodiment of the present invention includes a base body 1 having a grease tank T attached thereto and having a storage chamber 2 in which the grease from the grease tank T flows in and the grease that flows in. The suction port 11 is provided between the suction port 11 and the discharge port 12. The suction port 11 is provided between the suction port 11 and the discharge port 12, and is provided with the suction port 11 that sucks grease from the storage chamber 2 and communicates with the storage chamber 2 of the base body 1. The discharge part 10 having the cylinder chamber 13 for storing the grease from the cylinder and the cylinder part 13 of the discharge part 10 are provided so as to be able to advance and retreat, and when moving forward, the grease in the cylinder chamber 13 is pushed out and discharged from the discharge port 12 to exit. A piston 20 that sometimes sucks grease in the storage chamber 2 into the cylinder chamber 13 from the suction port 11 and a drive unit 30 that moves the piston 20 forward and backward are configured. One discharge unit 10 and one piston 20 are set as one set, and a plurality of sets are provided such that the axis 21 of each piston 20 is parallel. In the embodiment, six sets are provided.

As shown in FIGS. 1 to 3, 6, and 7, the base body 1 is provided with a communication port 4 that is formed with a female screw 8 and communicates with the storage chamber 2 on one side surface 3. A sliding hole 6 that supports the piston 20 so as to be movable in the direction of the axis 21 is formed on the other side surface 5 side. Further, an attachment port 51 for the grease tank T is attached to the upper surface 7, and a detachable cover 52 for protecting the grease tank T is provided.
As shown in FIG. 2, the storage chamber 2 is provided inside the base body 1, communicates with the mounting opening 51 of the grease tank T, and has a substantially inverted U shape.

As shown in FIGS. 1, 3, 4, 6, and 7, the discharge unit 10 is formed in a cylindrical shape, and has a suction port 11 at one end and a discharge port 12 at the other end. 11 and a discharge port main body 14 having a cylinder chamber 13 between the discharge port 12. A male screw 17 that is screwed into a female screw 8 formed on one side surface 3 of the base body 1 is formed on the outer side of one end side of the discharge body 14, and the discharge body of the base body 1 with respect to the female screw 8 is formed. The discharge part 10 can be attached to and detached from the base body 1 by screwing the 14 male screws 17 and releasing the screws. An elastic ring 15 on which the piston 20 slides is fitted inside the discharge port 10 on the suction port 11 side. In the embodiment, a V ring is used as the elastic ring 15. Further, a check valve 16 that allows only the discharge of grease from the cylinder chamber 13 is provided inside the discharge port 12 of the discharge unit 10. The check valve 16 urges the valve body 16a to a closed position, and a valve body 16a that moves to a closed position in which the grease in the cylinder chamber 13 is retained in the cylinder chamber 13 and an open position in which the grease is discharged from the cylinder chamber 13. It is comprised with the spring 16b.
Moreover, as the discharge part 10, the thing of various discharge amount is prepared and it selects suitably. This discharge amount is the same as the volume of the cylinder chamber 13 of the discharge unit 10. In the present embodiment, a cylinder chamber 13 having a volume of 0.01 ml is selected.

  Further, in the present embodiment, when the discharge part 10 is removed from the communication port part 4 of the base body 1, it is screwed into the female screw 8 of the communication port part 4 so that the piston 20 can move freely in the communication port part 4. A body 40 can be attached. As shown in FIGS. 5 and 7, the closing body 40 is formed in a cup shape and has a recess 41 in which a piston can freely move, and a male screw 43 that engages with the female screw 8 of the communication port 4. Is formed. Further, the head portion 42 of the closing body 40 is formed in a shape with which a hexagon wrench is engaged.

  As shown in FIGS. 1, 6, and 7, the piston 20 is formed in a cylindrical shape having a diameter that slides on the inner wall of the cylinder chamber 13 of the discharge unit 10. The piston 20 is supported by the sliding hole 6 of the base body 1 so that the axis 21 penetrates the housing chamber 2 and the tip 22 side enters the communication port 4. Further, the base end 23 of the piston 20 is attached to a plate-like member 31 described later.

  As shown in FIGS. 1, 6, and 7, the drive unit 30 attaches one plate-like member 31 to which the base ends 23 of the six pistons 20 are attached, and the plate-like member 31 in the advance direction of the piston 20. The spring 32 to be energized, and the plate-like member 31 is pulled in the retracting direction of the piston 20 against the urging force of the spring 32 at the time of excitation, and the plate-like member 31 is moved in the advancing direction of the piston 20 by the urging force of the spring 32 at the time of non-excitation. And a solenoid 33 to be moved. The drive unit 30 is housed in a container 34 having a U-shaped cross section provided on the base body 1. Energization / non-energization of the solenoid 33 is performed, for example, by a command from a control unit or controller on the machine side to which the grease pump device S is attached.

The plate-like member 31 is formed in a disk shape, and six pistons 20 are attached thereto at equal intervals. The plate-like member 31 is connected to a mediating member 35 that is connected to a solenoid 33.
The spring 32 is provided in contact with one surface 31 a of the plate-like member 31, presses the one surface 31 a of the plate-like member 31 with its urging force, and pushes the plate-like member 31 to the piston when the solenoid 33 is not excited. Move in 20 advance directions.

  In addition, a detection device 36 that detects the forward / backward movement of the plate-like member 31 is provided inside the container 34. As shown in FIG. 1, the detection device 36 is composed of a limit switch and is attached to a fixed plate 33 a of a solenoid 33. The detection device 36 is turned on and off by a plate-like member 31 that moves forward and backward by the solenoid 33. Send a signal. This detection signal recognizes, for example, that the forward / backward movement of each piston 20 is normally performed via the plate-like member 31 in the controller or controller on the machine side to which the grease pump device S is attached, Alternatively, this detection signal is counted, and for example, the total discharge amount of grease and the remaining amount of grease in the grease tank T can be recognized.

Therefore, when grease is discharged using the grease pump device S, the following is performed. First, the case where the discharge part 10 is attached to all the some communication port parts 4 and grease is discharged from all the communication port parts 4 is demonstrated.
First, a discharge unit 10 having a desired discharge amount is selected, and the male screw 17 of the discharge unit main body 14 constituting the discharge unit 10 is screwed onto the female screw 8 of the communication port 4 of the base body 1 and attached. In the present embodiment, the discharge unit 10 having a discharge amount of 0.01 ml is selected. However, the present invention is not necessarily limited to this, and the discharge units 10 attached to the plurality of communication ports 4 have different discharge amounts. It is good as a thing.

  The grease tank T is attached by removing the cover 52 from the base body 1, attaching the grease tank T to the base body 1 at the attachment opening 51, and then attaching the cover 52 to the base body 1. As a result, the grease filled in the grease tank T can pass through the mounting opening 51 and flow into the storage chamber 2 of the base body 1.

  When the grease pump device S is operated, for example, the solenoid 33 of the drive unit 30 is energized or de-energized according to a command from a control unit or controller on the machine side to which the grease pump device S is attached. Specifically, as shown in FIG. 6A, when the solenoid 33 is energized and excited, the relay member 35 is pulled and moved in the retracting direction of the piston 20 by the solenoid 33. When the mediating member 35 is pulled, the plate-like member 31 connected to the mediating member 35 is pulled, and the pistons 20 attached to the plate-like member 31 move in the withdrawal direction all at once. When the tip 22 of each piston 20 retreats from the communication port 4, the grease stored in the storage chamber 2 is sucked into the cylinder chamber 13 of each discharge unit 10 from the suction port 11. The grease thus prepared is stored in each cylinder chamber 13. At this time, since the valve body 16a of the check valve 16 provided on the discharge port 12 side of the discharge unit 10 is positioned at the closed position by the biasing force of the spring 16b, the grease flows back from the discharge port 12 into the cylinder chamber 13. The situation of inflow is prevented.

  After the grease is stored in each cylinder chamber 13, as shown in FIG. 6B, the energization to the solenoid 33 is stopped and de-energized. As a result, the resistance of the spring 32 by the solenoid 33 disappears, and the spring 32 presses the one surface 31a of the plate-like member 31 by the biasing force, and the plate-like member 31 and the mediating member 35 move in the advancing direction of the piston 20. The pistons 20 attached to the plate-like member 31 are moved in the advance direction all at once. When the tip 22 of each piston 20 enters the cylinder chamber 13 of each discharge portion 10, the grease stored in each cylinder chamber 13 is pushed out and checked against the biasing force of the spring 16b by the pressure. The valve body 16a of the valve 16 moves to the open position, and grease is discharged from each discharge port 12. In this state, since the suction port 11 is sealed by the piston 20 and the elastic ring 15, the grease in the storage chamber 2 is not stored in the cylinder chamber 13.

  As a result, the grease can be discharged by the amount stored in the cylinder chamber 13, so that a predetermined amount of grease can be discharged. Moreover, since the discharge part 10 is provided with two or more, grease can be discharged to several places at once, Therefore, oil supply efficiency improves.

  In this manner, after the grease is discharged by energization or non-energization of the solenoid 33, the piston 20 is retracted again to store the grease in the cylinder chamber 13, and then the piston 20 is advanced to discharge the grease. Such an operation is repeated to supply grease to a predetermined location. At this time, since the elastic ring 15 is fitted inside the suction port 11, the piston 20 slides on the elastic ring 15 when the piston 20 advances and retracts, and the piston 20 and the elastic ring 15 define the cylinder chamber 13. As a result, the grease in the cylinder chamber 13 can be prevented from leaking from the suction port 11. Further, since the plurality of pistons 20 are attached to the single plate-like member 31, the plurality of pistons 20 can be moved back and forth at a time, so that the drive unit 30 can be simply configured.

Further, in the detection device 36, the forward / backward movement of the plate-like member 31 is detected by the excitation / non-excitation of the solenoid 33. In this case, since the detection device 36 detects the forward / backward movement of the piston 20 via the plate-like member 31, for example, grease is discharged from the control unit or controller on the machine side to which the grease pump device S is attached. Can be recognized. In this case, since the plurality of pistons 20 are attached to one plate-like member 31, all the pistons 20 can be detected at a time by detecting the forward / backward movement of one plate-like member 31. .
Further, for example, in the control unit or controller on the machine side to which the grease pump device S is attached, this detection signal is counted, and for example, the total discharge amount of grease or the remaining amount of grease in the grease tank T can be recognized. it can.

  Next, the case where grease is discharged from a predetermined number of communication ports 4 among the plurality of communication ports 4 will be described. For example, the case where the grease is discharged from the four communication ports 4 among the six communication ports 4 and the two communication ports 4 are not used will be described.

In this case, the two closing bodies 40 are attached instead of the two discharge units 10. Specifically, as shown in FIG. 7, the two discharge portions 10 are removed from the communication port portion 4 of the base body 1, and the male screw 43 of each closing body 40 is screwed into the female screw 8 of the two communication port portions 4. Install them together. Attachment is performed by turning the head 42 with a hexagon wrench. At this time, since the piston 20 is supported on the base body 1 side, the discharge portion main body 14 and the piston 20 are separated from each other. Therefore, the discharge portion main body 14 and the closing body 40 can be easily replaced. When the piston 20 is moved forward and backward by the drive unit 30 in the same manner as described above, the grease is discharged only from the discharge port 12 of the discharge unit 10 and the grease is not discharged from the closing body 40. At this time, the piston 20 corresponding to the closing body 40 is allowed to move freely in the recess 41 of the closing body 40 as shown in FIG. Therefore, even if grease is not discharged, the piston 20 can move forward and backward, so that it is possible to prevent a situation such as failure of the device.
Thus, since the discharge part 10 and the obstruction | occlusion body 40 were exchangeable to the base body 1, it becomes possible to use the discharge part 10 only in the desired number, Therefore, versatility improves.

  In the above-described embodiment, the piston 20 is provided on the base body 1 side, and the piston 20 and the discharge unit 10 are separated. However, as shown in FIG. Anyway. In this case, the piston 20 is movably supported in the slide hole 18 formed in the discharge portion main body 14 so that the axis 21 penetrates the containing chamber 2, and the plate-like member 31 is moved by the drive portion 30. When moved in the advance direction, the piston 20 is pushed forward by the plate-like member 31 to advance, and the grease in the cylinder chamber 13 is pushed out and discharged. Further, the piston 20 is retracted by the internally mounted spring 19 to store the grease in the cylinder chamber 13.

In addition, in the said embodiment, although comprised 6 sets of the discharge part 10 and piston 20, it is not necessarily limited to this, Any number may be sufficient and it may change suitably.
In the above embodiment, the storage chamber 2 is formed in a substantially inverted U shape. However, the storage chamber 2 is not necessarily limited to this, and may be in communication with each of the suction ports 11 and the grease tank T. There is no problem.
Furthermore, in the said embodiment, although the plate-shaped member 31 was formed in the disk shape, it is not necessarily limited to this, What kind of shape may be sufficient and can change suitably.
Furthermore, in the above-described embodiment, the detection device 36 is configured by a limit switch, but the present invention is not necessarily limited to this.

It is a side view which shows the grease pump apparatus which concerns on embodiment of this invention. It is an AA sectional view in Drawing 1 showing a grease pump device concerning an embodiment of the invention. It is a front view which shows the grease pump apparatus which concerns on embodiment of this invention. The discharge part which concerns on embodiment of this invention is shown, (A) is side surface sectional drawing, (B) is a perspective view. The obstruction | occlusion body which concerns on embodiment of this invention is shown, (A) is side surface sectional drawing, (B) is a perspective view. The grease pump apparatus which concerns on embodiment of this invention is shown, (A) is the state which retracted the piston, (B) is sectional drawing which shows the state which advanced the piston. The state which attached the discharge part and closure body of the grease pump apparatus which concerns on embodiment of this invention is shown, (A) is the state which retracted the piston, (B) is sectional drawing which shows the state which advanced the piston. is there. It is sectional drawing which shows the grease pump apparatus which provided the piston in the discharge part and was formed integrally. It is a figure which shows an example of the conventional grease pump apparatus.

Explanation of symbols

S Grease pump device T Grease tank 1 Base body 2 Storage chamber 3 One side surface 4 Communication port portion 5 Other side surface 6 Sliding hole 7 Upper surface 8 Female screw 10 Discharge portion 11 Suction port 12 Discharge port 13 Cylinder chamber 14 Discharge portion body 15 Elasticity Ring 16 Check valve 16a Valve body 16b Spring 17 Male screw 18 Sliding hole 19 Spring 20 Piston 21 Axis 22 Tip 23 Base end 30 Drive part 31 Plate member 31a One side 32 Spring 33 Solenoid 33a Fixing plate 34 Container 35 Mediating member 36 Detection device 40 Occlusion body 41 Recess 42 Head 43 Male screw 50 Container body 51 Mounting port 52 Cover

Claims (5)

A base body provided with a grease tank to which grease is filled and in which grease from the grease tank flows in and accommodates the inflowed grease, and a base body provided in the base body and communicating with the storage chamber of the base body A discharge portion having a suction port for sucking grease from the storage chamber and a discharge port for discharging grease, and having a cylinder chamber that is provided between the suction port and the discharge port and stores grease from the suction port; A piston which is provided so as to be capable of moving forward and backward with respect to the cylinder chamber of the discharge portion, pushes out the grease in the cylinder chamber at the time of advancement, discharges the grease from the discharge port, and sucks the grease in the storage chamber from the suction port into the cylinder chamber when leaving; A grease pump including a drive unit for moving the piston forward and backward, and a plurality of sets of the discharge unit and the piston so that the axes of the pistons are parallel to each other. In the location,
The discharge unit is configured to include a discharge unit main body having a suction port at one end and a discharge port at the other end and a cylinder chamber between the suction port and the discharge port. A male screw is formed on the outer side, a female screw into which the male screw is screwed is formed on one side surface of the base body, and a communication port portion communicating with the housing chamber is provided, and the discharge portion for the female screw of the base body The discharge part can be attached to and detached from the base body by screwing and releasing the male screw of the main body, and when the discharge part is removed from the communication port part, the piston is screwed into the communication port part and the piston is connected to the communication port. A grease pump device characterized in that a closing body capable of floating in a section can be attached.   An elastic ring on which the piston slides is fitted inside the discharge port side of the discharge unit, and a check valve that allows only the grease discharge from the cylinder chamber is provided inside the discharge port side of the discharge unit. The grease pump device according to claim 1.   The plurality of pistons are movably supported in sliding holes formed on the other side of the base body so that the axis thereof penetrates the housing chamber and enters the communication port. The grease pump device according to 1 or 2.   The drive unit is opposed to one plate-like member to which the base ends of the plurality of pistons are attached, a spring that urges the plate-like member in the advance direction of the piston, and an urging force of the spring during excitation. And a solenoid that pulls the plate member in the piston retraction direction and moves the plate member in the piston advancing direction by a biasing force of the spring when de-excited. The grease pump device according to any one of 1 to 3.   The grease pump device according to claim 4, further comprising a detection device that detects an advance / retreat operation of the plate-like member.

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