Integrated hydraulic power device

Abstract

The utility model relates to the field of hydraulic power devices, and discloses an integrated hydraulic power device which comprises a hydraulic oil tank, a pressurizing air bag and a hydraulic pump, the hydraulic oil tank is provided with an oil return cavity, an oil outlet cavity and an oil passing hole, and the oil return cavity and the oil outlet cavity are arranged in a separated mode and communicated with each other through the oil passing hole. A bag body of the pressurizing air bag is arranged in the oil return cavity, and the hydraulic pump is arranged in the oil outlet cavity. The pressurizing air bag of the integrated hydraulic power device is long in service life and does not need to be maintained frequently.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic power devices, and in particular relates to an integrated hydraulic power device. Background Art

[0002] The integrated hydraulic power unit is a device formed by the high integration of hydraulic oil tanks, power elements, valves and other devices, and has the characteristics of compact structure, miniaturization and light weight. In the existing integrated hydraulic power units, the inner cavity of the hydraulic oil tank is generally provided with a booster airbag, which is filled with gas or directly connected to the atmosphere, and can adaptively expand or contract to maintain the oil pressure of the hydraulic oil at a normal value and keep the inner cavity of the hydraulic oil tank filled, so that the power element can continuously and smoothly output hydraulic oil. However, in actual application, the booster airbag is more prone to damage and has a short service life, which requires more frequent maintenance of the integrated hydraulic power unit. Utility Model Content

[0003] In view of the above-mentioned defects or shortcomings, the utility model provides an integrated hydraulic power device, aiming to solve the technical problems that the booster airbag in the existing integrated hydraulic power device is easy to be damaged, has a short service life, and requires frequent maintenance.

[0004] To achieve the above object, the utility model provides an integrated hydraulic power device, the integrated hydraulic power device comprising:

[0005] A hydraulic oil tank, comprising an oil return chamber, an oil outlet chamber and an oil through hole, wherein the oil return chamber and the oil outlet chamber are separated and connected to each other through the oil through hole;

[0006] A pressurized airbag, wherein the airbag body of the pressurized airbag is arranged in the oil return chamber;

[0007] A hydraulic pump is arranged in the oil outlet cavity.

[0008] Optionally, the hydraulic oil tank includes a first end cover, a partition, a second end cover, an oil return tank body and an oil outlet tank body, the first end cover, the partition and the second end cover are arranged in sequence, the oil return tank body is arranged between the first end cover and the partition, and together with the first end cover and the partition, the oil return chamber is enclosed, the oil outlet tank body is arranged between the partition and the second end cover, and together with the partition and the second end cover, the oil outlet chamber is enclosed, and the oil hole is formed on the partition.

[0009] Optionally, the hydraulic oil tank further includes a connecting rod, which connects the first end cover and the second end cover to fix the oil return tank body, the partition and the oil outlet tank body between the first end cover and the second end cover.

[0010] Optionally, the partition is provided with a connecting flange with a connecting through hole, and the connecting flange is sleeved on the connecting rod through the connecting through hole.

[0011] Optionally, the oil return tank is cylindrical in shape and its two ends are respectively nested and connected with the first end cover and the partition.

[0012] Optionally, a first sealing structure is provided between both ends of the oil return tank and the first end cover and the partition respectively.

[0013] Optionally, the oil outlet box body is cylindrical and its two ends are respectively nested and connected with the partition and the second end cover.

[0014] Optionally, a second sealing structure is provided between the two ends of the oil outlet tank body and the partition and the second end cover respectively.

[0015] Optionally, a one-way valve is provided in the oil passage hole, the outlet end of the one-way valve is connected to the oil return chamber, and the inlet end of the one-way valve is connected to the oil outlet chamber.

[0016] Optionally, the cavity wall surface of the oil return cavity includes a spherical concave surface, and the inflation and deflation nozzle of the pressurized airbag is connected to the spherical concave surface.

[0017] Through the above technical scheme, in the integrated hydraulic power device of the utility model, the hydraulic oil tank has a return oil chamber and an oil outlet chamber which are separately arranged, and the bladder body of the booster airbag and the hydraulic pump are respectively arranged in the return oil chamber and the oil outlet chamber. In this way, the return oil chamber only needs to accommodate the bladder body of the booster airbag. Compared with the oil chamber in the existing integrated hydraulic power device which needs to accommodate the bladder body of the booster airbag and the hydraulic pump at the same time, the bladder body of the booster airbag and the hydraulic pump are separated, which can avoid the large particle impurities generated during the operation of the hydraulic pump from wearing the bladder body of the booster airbag, thereby further improving the service life of the booster airbag.

[0018] In addition, the internal space of the oil return chamber can be set to be smaller. During the expansion of the booster airbag, part of the wall of the oil return chamber can contact the booster airbag to support the booster airbag. In this way, the booster airbag can avoid being easily damaged by the large tension of the internal gas, which effectively further improves the service life of the booster airbag. In summary, by arranging the booster airbag and the hydraulic pump in the oil return chamber and the oil outlet chamber respectively, the service life of the booster airbag can be significantly improved, avoiding the need for more frequent maintenance of the integrated hydraulic power device.

[0019] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide an understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation to the present invention. In the accompanying drawings:

[0021] Figure 1 It is a structural schematic diagram of an integrated hydraulic power device in a specific implementation manner of the utility model.

[0022] Description of the accompanying drawings in the embodiment of the utility model

[0023] 1 First end cover 2 Separator

[0024] 3 Second end cover 4 Oil return tank

[0025] 5 Oil outlet tank 6 Connecting rod

[0026] 7 Pressurized airbag 8 Hydraulic pump

[0027] 9 Check valve

[0028] a oil return chamber b oil outlet chamber DETAILED DESCRIPTION

[0029] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0030] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0031] In the present invention, unless otherwise specified, directional words such as "up, down, top, bottom" are usually used with reference to the directions shown in the drawings or are used to describe the relative positional relationships of components in the vertical, perpendicular or gravity direction.

[0032] The present invention will be described in detail below with reference to the accompanying drawings and in combination with exemplary embodiments.

[0033] Refer to the attached Figure 1 As shown, an exemplary embodiment of the utility model provides an integrated hydraulic power device, which includes a hydraulic oil tank, a booster airbag 7 and a hydraulic pump 8. The hydraulic oil tank has an oil return chamber a, an oil outlet chamber b and an oil through hole. The oil return chamber a and the oil outlet chamber b are separately arranged and connected to each other through the oil through hole. The bag body of the booster airbag 7 is arranged in the oil return chamber a, and the hydraulic pump 8 is arranged in the oil outlet chamber b.

[0034] Specifically, the hydraulic oil tank has an oil return channel connected to the oil return chamber a and an oil outlet channel connected to the oil outlet of the hydraulic pump 8. In the actual working process, the hydraulic pump 8 operates to absorb the hydraulic oil in the oil outlet chamber b and supply oil to the external power system through the oil outlet channel. At the same time, the capsule of the booster airbag 7 expands or contracts to maintain the oil pressure in the oil return chamber a at a normal value and to keep the hydraulic oil filling the oil return chamber a, so that the hydraulic oil in the oil return chamber a can continuously and quickly replenish the hydraulic oil to the oil outlet chamber b through the oil hole, thereby ensuring that the hydraulic pump 8 can maintain smooth output of hydraulic oil.

[0035] In the integrated hydraulic power device of the present embodiment, the hydraulic oil tank has a return oil chamber a and an oil outlet chamber b which are separately arranged, and the body of the booster airbag 7 and the hydraulic pump 8 are respectively arranged in the return oil chamber a and the oil outlet chamber b. With such an arrangement, the return oil chamber a only needs to accommodate the body of the booster airbag 7. Compared with the oil chamber in the existing integrated hydraulic power device which needs to accommodate both the body of the booster airbag and the hydraulic pump at the same time, the body of the booster airbag 7 and the hydraulic pump 8 are separated, which can avoid the large particle impurities generated during the operation of the hydraulic pump 8 from wearing the body of the booster airbag 7, thereby increasing the service life of the booster airbag 7.

[0036] In addition, the internal space of the oil return chamber a can be set to be smaller. During the expansion of the body of the boost airbag 7, part of the wall of the oil return chamber a can contact the body of the boost airbag 7 to support the body of the boost airbag 7. In this way, the problem of the body of the boost airbag 7 being continuously subjected to the large tension of the internal gas and being more easily damaged can be avoided, thereby effectively further improving the service life of the boost airbag 7.

[0037] In summary, by arranging the body of the booster airbag 7 and the hydraulic pump 8 in the oil return chamber a and the oil outlet chamber b respectively, the service life of the booster airbag 7 can be significantly improved, avoiding the need for more frequent maintenance of the integrated hydraulic power device.

[0038] In one embodiment, referring to the attached Figure 1 As shown, the hydraulic oil tank includes a first end cover 1, a partition 2, a second end cover 3, an oil return tank body 4 and an oil outlet tank body 5. The first end cover 1, the partition 2 and the second end cover 3 are arranged in sequence. The oil return tank body 4 is arranged between the first end cover 1 and the partition 2, and together with the first end cover 1 and the partition 2, forms an oil return chamber a. The oil outlet tank body 5 is arranged between the partition 2 and the second end cover 3, and together with the partition 2 and the second end cover 3, forms an oil outlet chamber b. The oil hole is formed on the partition 2.

[0039] In this embodiment, the partition 2, the return oil chamber a together with the return oil box body 4 and the first end cover 1, and also forms the outlet oil chamber b together with the outlet oil box body 5 and the second end cover 3. That is to say, the partition 2 serves as the cavity wall of the return oil chamber a and the outlet oil chamber b at the same time. The oil hole formed on the partition 2 can connect the return oil chamber a and the outlet oil chamber b. Such an arrangement makes the hydraulic oil tank have good structural compactness, which meets the requirements of compact structure, miniaturization and lightweight of the integrated hydraulic power device.

[0040] Specifically, the oil return channel of the hydraulic oil tank can be opened on the first end cover 1, the partition 2 or the oil return tank body 4, preferably, opened on the partition 2, the oil outlet channel of the hydraulic oil tank can be opened on the partition 2, the second end cover 3 or the oil outlet tank body 5, preferably, the second end cover 3 can be set as a control valve block, and the oil outlet channel of the hydraulic oil tank is constituted by the internal flow channel structure of the control valve block, the hydraulic pump 8 can be installed on the inner side surface of the second end cover 3 facing the oil outlet chamber b, and the driving motor for driving the hydraulic pump 8 to operate can be installed on the outer side surface of the second end cover 3 facing away from the oil outlet chamber b. The second end cover 3 has a central through hole running through the inner and outer sides of the second end cover 3, and the power output shaft of the driving motor is connected to the hydraulic pump 8 through the central through hole.

[0041] Of course, in some other embodiments, the hydraulic oil tank may also be of other structural forms. For example, the hydraulic oil tank may include two independent tank bodies and connecting pipes. The inner cavities of the two tank bodies are respectively an oil return chamber a and an oil outlet chamber b. The connecting pipes respectively connect the inner cavities of the two tank bodies to form an oil through hole.

[0042] In one embodiment, referring to the attached Figure 1 As shown, the hydraulic oil tank further includes a connecting rod 6, which connects the first end cover 1 and the second end cover 3 to fix the oil return tank body 4, the partition 2 and the oil outlet tank body 5 between the first end cover 1 and the second end cover 3. In this way, the fixed connection of the various components of the hydraulic oil tank can be achieved.

[0043] In order to improve the convenience of disassembly and assembly of the connecting rod 6, the connecting rod 6 can be detachably connected to the first end cover 2 and the second end cover 3 respectively. Specifically, the connecting rod 6 can be configured as a screw with an external thread, the first end cover 1 and the second end cover 3, and the first end cover 1 and the second end cover 3 are respectively provided with connecting through holes. The two ends of the connecting rod 6 respectively pass through the connecting through holes of the first end cover 1 and the second end cover 3 and are screwed with nuts, so that the connecting rod 6 connects the first end cover 1 and the second end cover 3.

[0044] Specifically, the hydraulic oil tank may include a plurality of connecting rods 6, and the plurality of connecting rods 6 are respectively connected to the first end cover 1 and the second end cover 3, so that the structural strength of the hydraulic oil tank can be further improved.

[0045] In one embodiment, a heat pipe can be sleeved on the connecting rod 6, and cooling fins can be sleeved on the heat pipe along the axial direction of the connecting rod 6, so that the cooling fins are in contact with the outer peripheral wall of the return oil tank 4 and / or the oil outlet tank 5. In this way, the heat dissipation effect of the return oil tank 4 and / or the oil outlet tank 5 can be significantly improved through the heat conduction effect of the heat pipe, so that the integrated hydraulic power unit has good heat dissipation performance, and the integrated hydraulic power unit can continue to operate under high frequency and heavy load conditions, thereby having good practicality.

[0046] In one embodiment, the partition 2 is provided with a connecting flange with a connecting through hole, and the connecting flange is sleeved on the connecting rod 6 through the connecting through hole. Such a configuration can improve the strength and stability of the overall structural connection of the hydraulic oil tank.

[0047] In one embodiment, the oil return tank body 4 is cylindrical and its two ends are respectively connected with the first end cover 1 and the partition 2. Such a configuration can improve the strength and stability of the connection between the oil return tank body 4 and the first end cover 1 and the partition 2.

[0048] Specifically, bosses are respectively provided on the facing sides of the first end cover 1 and the partition 2, and the two ends of the return oil tank body 4 are respectively mounted on the bosses of the first end cover 1 and the partition 2, or, annular grooves are respectively provided on the facing sides of the first end cover 1 and the partition 2, and the two ends of the return oil tank body 4 are respectively embedded in the annular grooves of the first end cover 1 and the partition 2.

[0049] In one embodiment, a first sealing structure is provided between the two ends of the oil return tank 4 and the first end cover 1 and the partition 2. Such a configuration can effectively ensure the sealing of the connection between the oil return tank 4 and the first end cover 1 and the partition 2, and prevent the hydraulic oil from leaking from the connection.

[0050] Specifically, the first sealing structure may be a sealing ring or a sealing ring, or may be a sealing groove formed on the first end cover 1 and the separator 2, and the sealing groove is filled with a sealing member or a sealant.

[0051] In one embodiment, the oil outlet tank body 5 is cylindrical and its two ends are respectively connected to the partition 2 and the second end cover 3 by being nested. Such arrangement can improve the strength and stability of the oil outlet tank body 5 and the partition 2 and the second end cover 3 respectively.

[0052] Specifically, bosses are respectively provided on the opposing sides of the partition 2 and the second end cover 3, and the two ends of the oil outlet tank body 5 are respectively sleeved on the bosses of the partition 2 and the second end cover 3, or, annular grooves are respectively provided on the opposing sides of the partition 2 and the second end cover 3, and the two ends of the oil outlet tank body 5 are respectively embedded in the annular grooves of the partition 2 and the second end cover 3.

[0053] In one embodiment, a second sealing structure is provided between the two ends of the oil outlet tank body 5 and the partition 2 and the second end cover 3. Such a configuration can effectively ensure the sealing of the connection between the oil outlet tank body 5 and the partition 2 and the second end cover 3, and prevent the hydraulic oil from leaking from the connection.

[0054] Specifically, the second sealing structure may be a sealing ring or a sealing ring, or may be a sealing groove formed on the separator 2 and the second end cover 3, and the sealing groove is filled with a sealing member or a sealant.

[0055] In one embodiment, a one-way valve 9 is provided in the oil hole, the outlet end of the one-way valve 9 is connected to the oil return chamber a, and the inlet end of the one-way valve 9 is connected to the oil outlet chamber b. In this arrangement, the one-way flow characteristic of the one-way valve 9 allows the hydraulic oil to flow only from the oil return chamber a to the oil outlet chamber b, and will not flow back from the oil outlet chamber b to the oil chamber a. In this way, it is possible to prevent particles generated by the hydraulic pump 8 from entering the oil return chamber a through the oil hole to wear the capsule of the booster airbag 7.

[0056] Specifically, the one-way valve 9 may be a fungus-type valve, which has the advantages of simple structure, flexible operation and high reliability.

[0057] In one embodiment, the wall surface of the oil return chamber a includes a spherical concave surface, and the inflation and deflation nozzle of the pressurized airbag 7 is connected to the spherical concave surface.

[0058] It can be understood that the spherical concave surface fits more closely with the inflated body of the boost airbag 7, effectively increasing the contact area between the wall of the return oil chamber a and the inflated body of the boost airbag 7, thereby providing better support for the body of the boost airbag 7, further weakening the effect of gas tension on the body of the boost airbag 7, and increasing the service life of the body of the boost airbag 7.

[0059] Specifically, the cavity wall surface of the oil return chamber a may include multiple spherical concave surfaces, and the number and arrangement of the spherical concave surfaces are set according to the shape of the bladder body of the boost airbag 7 and the structure of the oil return chamber a. For example, the bladder body of the boost airbag 7 is roughly elliptical, and the oil return chamber a is surrounded by the oil return box body 4, the boss provided on the first end cover 1, and the boss provided on the partition 2. The cavity wall surface of the oil return chamber a may include two spherical concave surfaces, which are respectively formed on the boss provided on the first end cover 1 and the boss provided on the partition 2 and are arranged opposite to each other. The inflation and deflation nozzle of the boost airbag 7 is connected to the boss provided on the first end cover 1. In this way, the entire cavity wall surface of the oil return chamber a is roughly adapted to the shape of the bladder body of the boost airbag 7. After the bladder body of the boost airbag 7 is expanded, the cavity wall surface of the oil return chamber a can be more fully in contact with the bladder body of the boost airbag 7 for more effective support.

[0060] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0061] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0063] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An integrated hydraulic power unit, characterized in that: The integrated hydraulic power unit comprises: A hydraulic oil tank, comprising an oil return chamber (a), an oil outlet chamber (b) and an oil through hole, wherein the oil return chamber (a) and the oil outlet chamber (b) are separated and connected to each other through the oil through hole; A pressurized airbag (7), wherein the airbag body of the pressurized airbag (7) is arranged in the oil return chamber (a); A hydraulic pump (8) is arranged in the oil outlet chamber (b).

2. The integrated hydraulic power device according to claim 1, characterized in that: The hydraulic oil tank comprises a first end cover (1), a partition (2), a second end cover (3), an oil return tank body (4) and an oil outlet tank body (5); the first end cover (1), the partition (2) and the second end cover (3) are arranged in sequence and spaced apart; the oil return tank body (4) is arranged between the first end cover (1) and the partition (2), and together with the first end cover (1) and the partition (2) form the oil return chamber (a); the oil outlet tank body (5) is arranged between the partition (2) and the second end cover (3), and together with the partition (2) and the second end cover (3) form the oil outlet chamber (b); the oil through hole is formed on the partition (2).

3. The integrated hydraulic power device according to claim 2, characterized in that: The hydraulic oil tank further comprises a connecting rod (6), wherein the connecting rod (6) connects the first end cover (1) and the second end cover (3) so as to fix the oil return tank body (4), the partition (2) and the oil outlet tank body (5) between the first end cover (1) and the second end cover (3).

4. The integrated hydraulic power device according to claim 3, characterized in that: The partition (2) is provided with a connecting flange with a connecting through hole, and the connecting flange is sleeved on the connecting rod (6) through the connecting through hole.

5. The integrated hydraulic power device according to claim 2, characterized in that: The oil return box body (4) is cylindrical in shape and its two ends are respectively nested and connected with the first end cover (1) and the partition (2).

6. The integrated hydraulic power device according to claim 5, characterized in that: A first sealing structure is provided between the two ends of the oil return tank (4) and the first end cover (1) and the partition (2).

7. The integrated hydraulic power device according to claim 2, characterized in that: The oil outlet box body (5) is cylindrical in shape and its two ends are respectively nested and connected with the partition (2) and the second end cover (3).

8. The integrated hydraulic power device according to claim 7, characterized in that: Second sealing structures are provided between the two ends of the oil outlet box (5) and the partition (2) and the second end cover (3).

9. The integrated hydraulic power device according to claim 1, characterized in that: A one-way valve (9) is arranged in the oil passage hole, the outlet end of the one-way valve (9) is connected to the oil return chamber (a), and the inlet end of the one-way valve (9) is connected to the oil outlet chamber (b).

10. The integrated hydraulic power device according to claim 1, characterized in that: The wall surface of the oil return chamber (a) comprises a spherical concave surface, and the inflation and deflation nozzle of the pressurized air bag (7) is connected to the spherical concave surface.

Images