CN212536276U - Closed oil tank for hydraulic power unit - Google Patents

Abstract

The utility model discloses a closed oil tank for hydraulic power unit belongs to hydraulic power unit technical field. The air bag body is arranged in the box body, a vent communicated with the outside is arranged on the air bag body, the oil absorption corrugated pipe is arranged on the oil suction port, the oil return corrugated pipe is arranged on the oil return port, a first connecting ring is arranged on the slide rod, a second connecting ring is arranged on the first connecting ring, one end of the first extending arm is connected with the first connecting ring, the other end of the first extending arm is connected with the oil absorption corrugated pipe, one end of the second extending arm is connected with the second, and the other end of the second extending arm is connected with the oil return corrugated pipe. The utility model is used for hydraulic power unit's closed oil tank can make oil absorption mouth and oil return opening in the oil tank remain the bottom at the oil tank throughout, and the gassing when rolling up when preventing power unit oil absorption and inhaling air and oil return.

Description

Closed oil tank for hydraulic power unit

Technical Field

The utility model relates to a hydraulic power unit technical field, concretely relates to closed oil tank for hydraulic power unit.

Background

The oil tank is a special container for storing hydraulic oil in the hydraulic power unit, and can be divided into an open oil tank and a closed oil tank; the closed oil tank utilizes the retractility of the closed oil tank to prevent outside air from contacting with the liquid level in the oil tank, and simultaneously can ensure that the pressure on the liquid level is atmospheric pressure, so the closed oil tank is mostly applied to a hydraulic power unit with a large action range, but an oil suction port and an oil return port cannot be ensured to be always positioned at the bottom of the oil tank in the oil tank of the existing hydraulic power unit, and the liquid level with uneven oscillation easily enables the oil suction port to be emptied or oil in the oil return port to splash to generate bubbles when the closed oil tank shakes, thereby influencing the normal operation of the power unit.

There is a need to solve the above problems by providing a closed tank for a hydraulic power unit.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem who solves: the closed oil tank for the hydraulic power unit can enable an oil suction port and an oil return port in the oil tank to be always kept at the bottom of the oil tank, and prevent air entrainment and air bubble generation during oil return when the power unit sucks oil.

In order to solve the technical problem, the utility model discloses a as follows technical scheme be: a closed oil tank for a hydraulic power unit is used for being connected and matched with a power unit valve block, an oil suction port of a power unit oil pump on the power unit valve block and an oil return port on the power unit valve block; the closed oil tank for the hydraulic power unit comprises a tank body, an air bag body, an oil absorption corrugated pipe, an oil return corrugated pipe, a first extension arm, a second extension arm and a slide rod, wherein the tank body is connected with a power unit valve block, a sink groove is formed in the inner bottom of the tank body, a through hole is formed in the tank body, the air bag body is arranged in the tank body, the air bag body is of a two-layer barrel type rotary structure, the air bag body comprises a folding surface and a closed surface, an air vent is formed in the air bag body, an air pipe corresponding to the through hole is arranged on the air vent, the oil absorption corrugated pipe is arranged on an oil suction port, an oil absorption oil filter is arranged at the other end of the oil absorption corrugated pipe, the oil return corrugated pipe is arranged on the oil suction port, an oil return oil filter is arranged at the other end of, the first connecting ring is provided with a first extension arm, one end of the first extension arm is connected with the first connecting ring, the other end of the first extension arm is connected with the oil suction oil filter, one end of the second extension arm is connected with the second connecting ring, the other end of the second extension arm is connected with the oil return oil filter, and two limiting blocks are arranged on the second extension arm.

Furthermore, the perforation is provided with two, a ventilation cover is arranged on the perforation, and a filter screen is arranged on the ventilation cover.

Furthermore, an isolation cylinder is arranged inside the box body.

Furthermore, one end of the oil suction corrugated pipe is provided with a pipe joint, and the other end of the pipe joint is fixed with the oil suction opening.

Furthermore, the top of slide bar is equipped with two and bears the arm, bear the end of arm and be connected with the box, the other end of slide bar is equipped with the screw of being connected usefulness with the box bottom.

Further, the first connecting ring comprises an outer convex part and an inner concave part, and the second connecting ring is rotatably sleeved on the inner concave part.

Furthermore, one side of the second connecting ring is provided with a socket.

Furthermore, one end of the second extension arm connected with the second connecting ring is provided with an inserting block corresponding to the socket.

Compared with other methods, the utility model, beneficial technological effect is: the utility model discloses a closed oil tank for hydraulic power unit, the power distribution box comprises a box body, the gasbag body, the oil absorption bellows, the oil return bellows, first extension arm, second extension arm and slide bar, the expansible, the gasbag body of shrink sets up in the box, the oil absorption bellows is equipped with oil absorption oil filter and oil return oil filter respectively with the one end that has the bellows, first extension arm and second extension arm all slide and rotationally set up on the slide bar, the one end and the oil absorption oil filter of first extension arm are connected, the one end and the oil return oil filter of second extension arm link to each other, thereby make oil absorption oil filter and oil return oil filter can drive the bottom position that follows the slide bar landing all the time and rotate the box under the action of gravity, avoid the liquid level to rock and cause and.

Drawings

The present invention will be further explained with reference to the drawings and examples.

In the figure: fig. 1 is a schematic view of the assembly of a closed oil tank and a power unit valve for a hydraulic power unit according to the present invention;

fig. 2 is a cross-sectional view taken along the direction E-E of the closed fuel tank of fig. 1;

FIG. 3 is an enlarged schematic view of area A of the closed tank of FIG. 1;

FIG. 4 is a cross-sectional view taken along the direction F-F in FIG. 3;

FIG. 5 is another state diagram of the portion shown in FIG. 4;

FIG. 6 is an enlarged view of the area B in the closed tank of FIG. 1

In the figure:

100. a box body; 101. a flanging body; 102. perforating; 103. a vent cover; 1031. a filter screen; 104. sinking a groove; 1. a balloon body; 11. folding the surface; 12. a closing surface; 13. a cavity; 2. an oil absorbing bellows; 21. an oil suction filter; 22. a pipe joint; 3. an oil return bellows; 31. an oil return filter; 4. a first extension arm; 41. a fixing plate; 5. a second extension arm; 51. an insertion block; 52. a limiting block; 6. a slide bar; 61. a screw; 62. a carrying arm; 7. a first connecting ring; 71. an outer convex portion; 72. an inner concave portion; 8. a second connection ring; 81. a socket; 9. an isolation cylinder;

200. a power unit oil pump; 201. an oil suction port;

300. a power unit valve block; 301. and an oil return port.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the present application, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1, the closed oil tank for a hydraulic power unit according to the present invention is fixedly installed on a power unit valve block 300 when in use, a power unit oil pump 200 and an oil return port 301 are installed on the power unit valve block 300, and an oil suction port 201 is installed on the power unit oil pump 200;

as shown in fig. 1, the closed oil tank of the embodiment specifically includes a tank 100 fixedly mounted on a power unit valve block 300, an air bag body 1 disposed in the tank 100, an oil suction corrugated pipe 2 connected to an oil suction port 201, an oil return corrugated pipe 3 connected to an oil return port 301, a sliding rod 6 disposed in the tank 100, a first extension arm 4 movably disposed on the sliding rod 6, and a second extension arm 5;

as further shown in fig. 1 and 2, in the present embodiment, the box 100 is a cylindrical structure, a top opening of the box 100 is provided with a flanging body 101 for fixedly connecting with the power unit valve block 300, and as shown in fig. 1 and 2, the inner bottom of the box 100 is provided with a plurality of sinking grooves 104 intersecting with the center of the bottom of the box 100; referring to fig. 6, two but not limited to two through holes 102 are symmetrically formed in the top of the box 100, a vent cover 103 is disposed on each through hole 102 in a threaded screwing or fastening manner, a filter net 1031 for isolating foreign particles is fixedly disposed on a vent hole of the vent cover 103, an isolation cylinder 9 with two open ends is fixedly disposed in the box 100 at a central position, and in this embodiment, the isolation cylinder 9 is a structure in which a plurality of through holes (not shown) are uniformly distributed on a side surface;

the air bag body 1 is arranged in the box body 100 and is sleeved outside the isolation cylinder 9 with a clearance, as shown in fig. 2, the air bag body 1 is a two-layer cylinder type rotary structure, the air bag body 1 is formed by closing two ends of a folding surface 11 at the outermost side and a closing surface 12 at the inner side, so as to form a cavity 13 of a ring shape at intervals between the closing surface 12 and the folding surface 11, as shown in fig. 6, a vent 14 is arranged at the top end of the airbag body 1 and at a position corresponding to the through hole 102 on the box body 100, an air tube 15 is fixedly connected with the outer end of the vent 14, and the other end of the air tube 15 extends into the corresponding through hole 102, the air tube 15 is sleeved on the ventilation cover 103, and the air tube 15 is pressed against the inner wall of the through hole 102 by the vent cover 103 fixed to the through hole 102, thereby communicating the cavity 13 of the airbag body 1 with the outside of the case 100 through the air tube 15 while isolating the inner cavity of the case 100 from the outside.

Referring to fig. 1, a pipe joint 22 is provided at one end of the oil suction bellows 2 facing the power unit oil pump 200, and the oil suction bellows 2 is fixedly connected to an oil suction port 201 of the power unit oil pump 200 through the pipe joint 22, and an oil suction filter 21 is fixedly installed at the other end of the oil suction bellows 2;

one end of the oil return corrugated pipe 3 is fixedly connected to the oil return port 301, and the other end of the oil return corrugated pipe 3 is fixedly provided with an oil return oil filter 31;

as shown in fig. 1, the slide bar 6 is disposed along the central axis of the box 100, and two, but not limited to, two bearing arms 62 are fixed at the top end of the slide bar 6, the bearing arms 62 are horizontally disposed and the end positions extending outward are fixed on the side walls of the box 100 by welding or screw fastening, so that one end of the slide bar 6 is fixed by the bearing arms 62, and the other end of the slide bar 6 is disposed on the inner bottom surface of the box 100; referring to fig. 3, one end of the slide rod 6 facing the bottom of the box 100 is provided with a screw 61, and the slide rod 6 is fixed to the box 100 through the screw 61;

as shown in fig. 3, the slide rod 6 is further slidably sleeved with a first connecting ring 7, the first connecting ring 7 includes outer convex portions 71 at two ends and an inner concave portion 72 between the two outer convex portions 71, a second connecting ring 8 is movably sleeved on the inner concave portion 72, and one side of the second connecting ring 8 is provided with a socket 81;

specifically, in the embodiment, the first extension arm 4 is perpendicular to the sliding rod 6 and is movably arranged on the sliding rod 6, one end of the first extension arm 4 facing the sliding rod 6 is fixedly provided with a fixing plate 41, the other side of the fixing plate 41 fixedly connects the first extension arm 4 to the side surface of the first connecting ring 7 through a screw or welding manner, and as shown in fig. 1, the other end of the first extension arm 4 is fixedly connected with the side surface of the oil filter 21;

referring to fig. 3, the second extension arm 5 is also arranged on the sliding rod 6 perpendicularly to the sliding rod 6, and one end of the second extension arm 5 facing the sliding rod 6 is fixedly connected with a plug-in block 51 correspondingly matched with a socket 81 on the second connection ring 8, the second extension arm 5 is fixed on the side surface of the second connection ring 8 through the plug-in block 51 in a plug-in manner, and the other end of the second extension arm 5 is fixedly connected with the side surface of the return oil filter 31, two limit blocks 52 are symmetrically arranged at one end of the second extension arm 5 facing the sliding rod 6, and the common plane of the two limit blocks 52 is the same as the rotation plane of the second extension arm 5 (refer to fig. 4).

The working process of the closed oil tank for the hydraulic power unit of the present invention is described below with reference to the accompanying drawings:

when the hydraulic power unit installed in cooperation with the closed oil tank of the present invention is in a vertical state as shown in fig. 1, due to gravity, the first connecting ring 7 drives the second connecting ring 8 to slide along the slide rod 6 to the bottom of the slide rod 6, which is close to the bottom of the tank 100, and simultaneously drives the oil suction filter 21 and the oil return filter 31 to move to the bottom of the tank, thereby avoiding the air suction of the oil suction port 201 or the impact of the hydraulic oil returned from the oil return port 301 to generate bubbles, and due to the stop block 52 arranged on the second extension arm, the second extension arm 5 is prevented from approaching the first extension arm 4 too close, and the oil suction filter 21 and the oil return filter 31 at the outer ends of the two oil filter extension arms are also spaced apart, so that the hydraulic oil returned from the oil filter 31 has enough time to precipitate dirt, discharge bubbles and cool; when the power unit is started, the power unit oil pump 200 operates, and the oil pressure in the box 100 changes while the oil amount changes, when the oil pressure in the box 100 is lower than the external atmospheric pressure, the cavity 13 of the airbag 1 is communicated with the outside, the airbag 1 is expanded and unfolded due to the pressure difference, so that the effective volume in the box 100 is reduced, the oil pressure is increased to tend to the atmospheric pressure, or when the oil pressure in the box 100 is higher than the external atmospheric pressure, the folded surface 11 is expanded under the action of the internal and external pressure difference of the airbag 1, and the effective oil volume in the box 100 is reduced, namely the pressure is reduced to tend to the atmospheric pressure, the oil pressure in the box 100 is kept consistent with the external atmospheric pressure through the expansion or contraction of the airbag 1, so that the hydraulic power unit can operate normally, in order to prevent the airbag 1 from abutting against the side wall of the box 100 when expanding, so that a part of the hydraulic oil, at this time, the sink 104 arranged at the bottom of the box body 100 can play a role in conducting current; meanwhile, the air bag body 1 moves upwards under the buoyancy action of the hydraulic oil, so that the bottom of the air bag body 1 is separated from the bottom of the oil tank 100, and the obstruction to the flow of the hydraulic oil is avoided; the isolation cylinder 9 is used for isolating the air bag body 1 from the oil suction filter 21 and the oil return filter 31, and preventing the air bag body 1 from blocking the oil suction filter 21 and the oil return filter 31 after deformation to influence the expected actions of the oil suction filter 21 and the oil return filter 31;

if the hydraulic power unit installed in cooperation with the closed oil tank of the present invention is in a horizontal state, referring to fig. 5, the first connecting ring 7 will rotate downward around the sliding rod 6 under the action of gravity, and the second connecting ring 8 will also rotate downward along the inner concave portion 72 on the first connecting ring 7 until rotating to the position shown in fig. 5, so that the stopper 52 abuts against the first extending arm 4, and finally the first extending arm 4 and the second extending arm 5 are stopped after a certain angle is formed therebetween, and the oil suction oil filter 21 and the oil return oil filter 31 located at the ends of the two extending arms will be driven to fall to the bottom position of the tank 100, and the oil suction oil filter 21 and the oil return oil filter 31 are spaced apart from each other, thereby facilitating the precipitation, exhaust and cooling of the returned hydraulic oil;

under the condition that this embodiment drawing is not shown, with the hydraulic power unit that the closed oil tank of the utility model cooperated installation can also refer to and put both upside down with the position reversal that fig. 1 shows, because first extension arm 4 and second extension arm 5 can slide to the bottom of oil tank 100 along slide bar 6 equally because of gravity reason, liquid level rocks in the oil tank when avoiding receiving external vibration, makes the oil absorption oil filter 21's oil absorption mouth or the oil return oil filter 31's oil return mouth contact air take place the air suction or produce the bubble.

The utility model relates to a closed oil tank for hydraulic power unit, the power distribution box comprises a box body 100, the gasbag body 1, oil absorption bellows 2, oil return bellows 3, first extension arm 4, second extension arm 5 and slide bar 6, the expansible, gasbag body 1 of shrink sets up in box 100, oil absorption bellows 2 and oil return bellows 3's one end is equipped with oil absorption oil filter 21 and oil return oil filter 31 respectively, first extension arm 4 and second extension arm 5 all slide and rotationally set up on slide bar 6, the one end of first extension arm 4 is connected with oil absorption oil filter 21, the one end of second extension arm 5 links to each other with oil return oil filter 31, thereby make oil absorption oil filter 21 and oil return oil filter 31 can drive the bottom position of following slide bar 6 landing all the time and rotating box 100 under the action of gravity, avoid the liquid level to rock and cause and inhale empty or produce the bubble.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (8)

1. The utility model provides a closed oil tank for hydraulic power unit for with power unit valve block (300), on power unit valve block (300) oil absorption mouth (201) and the oil return mouth (301) on power unit valve block (300) of power unit oil pump (200) connection cooperation, its characterized in that: the closed oil tank for the hydraulic power unit comprises a tank body (100), an air bag body (1), an oil absorption corrugated pipe (2), an oil return corrugated pipe (3), a first extension arm (4), a second extension arm (5) and a slide rod (6), wherein the tank body (100) is connected with a power unit valve block (300), a sinking groove (104) is formed in the inner bottom of the tank body (100), a perforation (102) is formed in the tank body (100), the air bag body (1) is arranged in the tank body (100), the air bag body (1) is of a two-layer barrel-shaped rotary structure, the air bag body (1) comprises a folding surface (11) and a closed surface (12), an air vent (14) is formed in the air bag body (1), an air pipe (15) corresponding to the perforation (102) is formed in the air vent (14), and the oil absorption corrugated pipe (2) is arranged on an oil absorption opening (201), the other end of the oil absorption corrugated pipe (2) is provided with an oil absorption filter (21), the oil return corrugated pipe (3) is arranged on the oil return port (301), and the other end of the oil return corrugated pipe (3) is provided with an oil return filter (31), the sliding rod (6) is fixedly arranged in the box body (100), a first connecting ring (7) is movably arranged on the sliding rod (6), a second connecting ring (8) is arranged on the first connecting ring (7), one end of the first extension arm (4) is connected with a first connecting ring (7), and the other end of the first extension arm (4) is connected with an oil suction filter (21), one end of the second extension arm (5) is connected with a second connecting ring (8), the other end of the second extension arm (5) is connected with an oil return filter (31), and two limiting blocks (52) are arranged on the second extension arm (5).

2. The closed oil tank for a hydraulic power unit according to claim 1, characterized in that: the number of the through holes (102) is two, a ventilation cover (103) is arranged on the through holes (102), and a filter screen (1031) is arranged on the ventilation cover (103).

3. The closed oil tank for a hydraulic power unit according to claim 1, characterized in that: an isolation cylinder (9) is arranged in the box body (100).

4. The closed oil tank for a hydraulic power unit according to claim 1, characterized in that: one end of the oil absorption corrugated pipe (2) is provided with a pipe joint (22), and the other end of the pipe joint (22) is fixed with the oil suction port (201).

5. The closed oil tank for a hydraulic power unit according to claim 1, characterized in that: the top of slide bar (6) is equipped with two and bears arm (62), bear the end of arm (62) and be connected with box (100), the other end of slide bar (6) is equipped with and is connected screw (61) of usefulness with box (100) bottom.

6. The closed oil tank for a hydraulic power unit according to claim 1, characterized in that: the first connecting ring (7) comprises a male portion (71) and a female portion (72), and the second connecting ring (8) is rotatably sleeved on the female portion (72).

7. The closed oil tank for a hydraulic power unit according to claim 1, characterized in that: one side of the second connecting ring (8) is provided with a socket (81).

8. The closed oil tank for a hydraulic power unit according to claim 1 or 7, characterized in that: one end of the second extension arm (5) connected with the second connecting ring (8) is provided with a plug-in block (51) corresponding to the plug-in opening (81).

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