A small integrated hydraulic power unit

Abstract

This utility model discloses a small integrated hydraulic power unit, including an oil tank, a motor, a gear pump, and a reversing valve. The oil tank is divided into a motor mounting cavity and a gear pump mounting cavity by a partition. A filter cartridge is also installed inside the oil tank. The oil tank has an oil inlet, and the filter cartridge is connected to the oil inlet and the reversing valve via two sets of oil pipes. The outer wall of the head end and the tail end cover of the motor mounting cavity are both provided with perforated frames, and the inner wall of the motor mounting cavity has circumferentially distributed protruding ridges. The tail end output shaft of the motor is connected to an exhaust impeller. This utility model, with its circumferential protruding ridges, staggered heat dissipation grooves, exhaust impeller, and double perforated frames, creates forced convection within the motor mounting cavity, effectively improving cooling. The filter cartridge filters the injected and returned oil, ensuring the cleanliness of the oil in the tank. Furthermore, rotating the inspection cover drives a cleaning ring to scrape away filter residue, and a magnetic ring adsorbs iron filings, extending the filter cartridge's lifespan.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic power technology, and in particular to a small integrated hydraulic power unit. Background Technology

[0002] Small integrated hydraulic power units integrate the motor, oil pump, oil tank, and valve block components together. However, due to the integrated design, the motor and oil pump are located in the same sealed oil tank, which causes heat accumulation and rapid temperature rise, affecting the life of the components. Furthermore, during oil filling, the intrusion of external particles and the entry of metal shavings from pump wear into the oil circuit can easily lead to a decrease in oil cleanliness, thereby aggravating the wear of the oil pump.

[0003] To address these issues, we propose a small, integrated hydraulic power unit. Utility Model Content

[0004] The purpose of this invention is to provide a small, integrated hydraulic power unit to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A small integrated hydraulic power unit includes an oil tank, a motor, a gear pump, and a reversing valve. The oil tank is divided into a motor mounting cavity and a gear pump mounting cavity by a partition. A filter cartridge is also installed in the oil tank. The oil tank is provided with an oil filling port, and the filter cartridge is connected to the oil filling port and the reversing valve through two sets of oil pipes. The outer wall of the head end and the cover of the tail end of the motor mounting cavity are provided with a hollow frame, and the inner wall of the motor mounting cavity is evenly distributed with protruding ridges along the circumference. The tail end output shaft of the motor is connected to an exhaust impeller.

[0007] In a further embodiment, the hollow frame is covered with a magnetic dustproof net.

[0008] In a further embodiment, each convex ridge has several heat dissipation grooves spaced apart on the side closest to the motor housing, and the heat dissipation grooves of adjacent convex ridges are staggered.

[0009] In a further embodiment, the filter cartridge is provided with a cleaning disc inside, and a cleaning ring is connected to the outer edge of the cleaning disc. The outer edge of the cleaning ring is in contact with the inner wall of the filter cartridge. An inspection cover is connected to the cleaning disc by a connecting rod, and the inspection cover is threadedly connected to the filter cartridge.

[0010] In a further embodiment, sealing gaskets are embedded in the contact surfaces of the inspection cover and the filter cartridge, as well as the contact surfaces of the inspection cover and the fuel tank housing.

[0011] In a further embodiment, a magnetic ring is fixed to the surface of the cleaning disc.

[0012] In a further embodiment, a one-way valve is installed inside the oil pipe.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This utility model features circumferential convex ridges to increase the heat dissipation area, and staggered heat dissipation grooves to guide airflow and form turbulence, thereby improving heat exchange efficiency. Combined with the exhaust impeller and double hollow frame, forced convection is formed in the motor mounting cavity, effectively improving the cooling effect.

[0015] This utility model features a filter cartridge that filters both the injected and returned oil, ensuring the cleanliness of the oil in the tank and reducing wear on the oil pump. Furthermore, rotating the inspection cover causes the cleaning ring to scrape off filter residue, while the magnetic ring attracts iron filings, which can extend the life of the filter element. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a bottom view of the internal structure of the fuel tank of this utility model;

[0018] Figure 3 This is a schematic diagram of the assembly structure of the motor, gear pump, reversing valve and filter cartridge of this utility model;

[0019] Figure 4 This is a schematic diagram of the motor mounting cavity and motor assembly structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the half-section structure of the filter cartridge and oil pipe assembly of this utility model.

[0021] In the diagram: 1. Oil tank; 2. Motor; 3. Gear pump; 4. Reversing valve; 5. Baffle plate; 6. Motor mounting cavity; 61. Hollow frame; 62. Raised rib; 621. Heat dissipation groove; 7. Gear pump mounting cavity; 8. Filter cartridge; 81. Cleaning disc; 82. Cleaning ring; 83. Magnetic ring; 84. Connecting rod; 85. Inspection cover; 9. Oil pipe; 91. Check valve; 10. Oil inlet; 11. Exhaust impeller; 12. Dustproof net. Detailed Implementation

[0022] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-5A small integrated hydraulic power unit includes an oil tank 1, a motor 2, a gear pump 3, and a reversing valve 4. The motor 2 is a double-headed motor, and its output shaft is connected to the gear pump 3 via a coupling, driving the gear pump 3. The discharge port of the gear pump 3 is connected to port A of the reversing valve 4. The suction port of the gear pump 3 extends to the bottom of the oil tank 1. Port B of the reversing valve 4 is also connected to the inside of the oil tank 1 and serves as a return port. Port P of the reversing valve 4 faces outwards and is used to connect to devices requiring power supply. A partition 5 is welded inside the oil tank 1. The partition 5 adopts a conformal structure to the housings of the motor 2 and the gear pump 3, separating the motor mounting cavity 6 from the gear pump mounting cavity 7. The motor 2 is placed... Inside the motor mounting cavity 6, its outer shell is in close contact with the cavity wall protrusions 62. An exhaust impeller 11 is installed on the output shaft at the tail end of the motor 2. Hollow frames 61 are added to both ends of the motor mounting cavity 6, and magnetic dustproof nets 12 are covered on the outside to form a heat dissipation channel. When the motor 2 is working, the airflow is drawn in through the dustproof net 12 at the head end of the motor mounting cavity 6, flows through the gaps between the protrusions 62, carries away the heat emitted by the motor 2, and then is discharged from the dustproof net 12 at the tail end of the motor mounting cavity 6. In addition, several heat dissipation grooves 621 are spaced apart on the side of each protrusion 62 near the outer shell of the motor 2. The heat dissipation grooves 621 of adjacent protrusions 62 are interlaced, which extends the heat exchange path, increases the heat exchange area, and significantly improves the heat exchange efficiency.

[0026] Inside the oil tank 1, a filter cartridge 8 is vertically installed. The filter cartridge 8 has a double-layer filter screen on its side wall: an inner layer of 100μm stainless steel coarse filter screen to intercept large particles, and an outer layer of glass fiber filter media for fine filtration. Inside the filter cartridge 8, there is a cleaning disc 81. A cleaning ring 82 is connected to the outer edge of the cleaning disc 81, and the outer edge of the cleaning ring 82 fits snugly against the inner wall of the filter cartridge 8. A magnetic ring 83 is fixed to the surface of the cleaning disc 81. A maintenance cover 85 is connected to the cleaning disc 81 via a connecting rod 84. The upper end of the filter cartridge 8 has an internal thread, and the cylindrical part of the maintenance cover 85 has an external thread. The maintenance cover 85 is screwed onto the filter cartridge 8. When tight, the inner wall of the cylinder of the inspection cover 85 is flush with the inner wall of the lower part of the filter cylinder 8. In order to improve the sealing performance, the contact end face between the cylinder part of the inspection cover 85 and the filter cylinder 8, as well as the contact end face between the cover part of the inspection cover 85 and the outer shell of the oil tank 1, are all inlaid with sealing gaskets to achieve double sealing. The oil tank 1 is provided with an oil inlet 10, and an oil cap is screwed on the outside of the oil inlet 10. Two sets of oil pipes 9 are connected to both sides of the filter cylinder 8. One set of oil pipes 9 is connected to the oil inlet 10, and the other set of oil pipes 9 is connected to the reversing valve 4. A one-way valve 91 is installed inside the oil pipes 9 to prevent the oil from flowing back and contaminating the oil inlet 10.

[0027] Work process: Motor 2 starts and drives gear pump 3 to run. At the same time, exhaust impeller 11 at the tail end rotates. Gear pump 3 draws oil from the bottom of oil tank 1. The oil is output through port A and port P of reversing valve 4. When returning oil, port B and port P are connected. The oil passes through oil pipe 9 and check valve 91 in one direction through filter cylinder 8. When new oil is injected from oil inlet 10, it flows into filter cylinder 8 in one direction through oil pipe 9 and check valve 91 to avoid backflow contamination. Later, the inspection cover 85 is unscrewed and the connecting rod 84 is pulled to drive cleaning ring 82 to scrape off filter residue. Magnetic ring 83 adsorbs metal shavings.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A small integrated hydraulic power unit, comprising an oil tank (1), a motor (2), a gear pump (3), and a directional valve (4), characterized in that: The oil tank (1) is divided into a motor mounting cavity (6) and a gear pump mounting cavity (7) by a partition (5). A filter cylinder (8) is also installed in the oil tank (1). The oil tank (1) is provided with an oil inlet (10). The filter cylinder (8) is connected to the oil inlet (10) and the reversing valve (4) through two sets of oil pipes (9). The outer wall of the head end and the tail end cover of the motor mounting cavity (6) are provided with a hollow frame (61). The inner wall of the motor mounting cavity (6) is evenly distributed with protruding ridges (62) along the circumference. The tail end output shaft of the motor (2) is connected to an exhaust impeller (11).

2. The small integrated hydraulic power unit according to claim 1, characterized in that: The hollow frame (61) is covered with a magnetic dustproof net (12).

3. The small integrated hydraulic power unit according to claim 1, characterized in that: Each ridge (62) has several heat dissipation slots (621) spaced apart on the side closest to the motor (2) housing, and the heat dissipation slots (621) of adjacent ridges (62) are interleaved.

4. The small integrated hydraulic power unit according to claim 1, characterized in that: The filter cylinder (8) is provided with a cleaning disc (81) inside. The outer edge of the cleaning disc (81) is connected to a cleaning ring (82), and the outer edge of the cleaning ring (82) is in contact with the inner wall of the filter cylinder (8). The cleaning disc (81) is connected to a maintenance cover (85) via a connecting rod (84), and the maintenance cover (85) is threadedly connected to the filter cylinder (8).

5. A small integrated hydraulic power unit according to claim 4, characterized in that: The contact surfaces of the inspection cover (85) and the filter cylinder (8) as well as the contact surfaces of the inspection cover (85) and the outer shell of the oil tank (1) are all inlaid with sealing gaskets.

6. A small integrated hydraulic power unit according to claim 4, characterized in that: A magnetic ring (83) is fixed on the surface of the cleaning disc (81).

7. A small integrated hydraulic power unit according to claim 1, characterized in that: A one-way valve (91) is installed inside the oil pipe (9).

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