Hydraulic pump station with compact structure

Abstract

The utility model discloses a hydraulic pump station with a compact structure, which is characterized by comprising a fixed table, a motor, a central transition block and an oil tank, an oil inlet duct, a first oil outlet duct and a first oil return duct are arranged in the central transition block, and an overflow valve cavity with an overflow valve is formed at one end of the oil inlet duct. A one-way valve cavity with a one-way valve is formed between the other end of the oil inlet hole channel and one end of the first oil outlet hole channel, and an outlet valve block is detachably arranged on the front side of the center transition block. The valve has the advantages that the volume of oil in the oil inlet hole channel can be controlled through adjustment of the valve element driving device; the adaptive outlet valve block can be replaced according to the actual requirement of an external oil cylinder; due to the fact that the center transition block and the motor are sequentially and fixedly arranged on the upper portion of the fixing table from bottom to top, the oil tank is fixedly arranged at the bottom of the fixing table, and the gear pump is fixedly arranged in the oil tank, three-dimensional space is fully utilized, a compact structure is formed, and the hydraulic pump station is small in occupied area, convenient to use and easy to maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic pumps, in particular to a hydraulic pump station with a compact structure. Background Art

[0002] The hydraulic system is an indispensable power source for CNC machine tools. The hydraulic system includes a motor, a gear pump, an oil tank, a valve block, etc. However, the components of the existing hydraulic system are installed inside the machine tool frame in a dispersed manner, which occupies a large space and is inconvenient to maintain. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a hydraulic pump station with a compact structure and convenient maintenance, which occupies a small space.

[0004] The utility model solves the above technical problems by adopting the following technical solution: a compact hydraulic pump station, comprising a fixed platform, a motor, a central transition block and an oil tank with a gear pump, wherein the central transition block and the motor are fixedly arranged on the fixed platform from bottom to top, the oil tank is fixedly arranged at the bottom of the fixed platform, a first oil return port is opened on the oil tank, and the motor shaft of the motor passes downward through the central transition block and is connected to the gear pump.

[0005] An oil inlet channel, a first oil outlet channel and a first oil return channel connected to the first oil return port are arranged in the central transition block. The inner cavity of the oil inlet channel is connected to the oil outlet port of the gear pump through the oil supply channel. An overflow valve cavity with an overflow valve is formed at one end of the oil inlet channel. One end of the overflow valve extends outward from the central transition block and a valve core driving device is arranged on the extended part. The valve core of the overflow valve is movably arranged at the other end of the overflow valve cavity. A one-way valve cavity with a one-way valve is formed between the other end of the oil inlet channel and one end of the first oil outlet channel. The one-way valve is used to control the oil to flow from the oil inlet channel into the first oil outlet channel in one direction.

[0006] An outlet valve block is detachably provided on the front side of the central transition block, a second oil outlet channel and a second oil return channel are provided in the outlet valve block, a first oil outlet port and a second oil return port are provided at the front end of the central transition block, the first oil outlet channel is sealed and connected to the second oil outlet channel through the first oil outlet port and are internally connected, the first oil return channel is sealed and connected to the second oil return channel through the second oil return port and are internally connected, and a pressure gauge is fixedly provided in the second oil outlet channel.

[0007] Compared with the prior art, the utility model has the advantage that the motor drives the gear pump to rotate, the gear pump sucks oil from the oil tank and enters the oil inlet channel through the oil supply channel, and the valve core of the relief valve is pushed inward by the valve core driving device to increase the pressure of the oil in the oil inlet channel, thereby pushing open the valve core of the one-way valve, so that the oil enters the first oil outlet channel and the second oil outlet channel from the oil inlet channel in sequence. If the pressure displayed on the pressure gauge is greater than the preset value, the valve core driving device is adjusted outward; if the pressure displayed on the pressure gauge is less than the preset value, the valve core driving device is adjusted inward until the pressure displayed on the pressure gauge is the preset value, and the oil enters the external cylinder from the second oil outlet channel; the oil coming out of the external cylinder enters the first oil outlet channel in sequence from the second oil outlet channel The second oil return channel, the first oil return channel and the first oil return port enter the oil tank to complete the driving of the external oil cylinder; the volume of the oil in the oil inlet channel can be controlled by adjusting the valve core drive device. The more the valve core drive device is adjusted inward, the greater the force of the valve core to push open the one-way valve, and the pressure of the second oil outlet channel can be further adjusted and displayed by a pressure gauge; and the adapted outlet valve block can be replaced according to the actual needs of the external oil cylinder; since the central transition block and the motor are fixedly arranged on the upper part of the fixed platform from bottom to top, the oil tank is fixedly arranged on the bottom of the fixed platform, and a gear pump is fixedly arranged in the oil tank, the three-dimensional space is fully utilized to form a compact structure, so the hydraulic pump station occupies a small area, is easy to use and simple to maintain.

[0008] Furthermore, the valve core drive device includes an adjusting screw and a locking nut. A connecting screw hole is provided at one end of the valve core of the relief valve. The inner end of the adjusting screw is threadedly arranged in the connecting screw hole. The outer end of the adjusting screw extends outward from the central transition block. The locking nut is threadedly connected to the portion of the adjusting screw extending out of the central transition block. The adjusting screw can push the valve core of the relief valve to move inward and outward to control the volume of the oil in the oil inlet channel. The more the adjusting screw pushes the valve core inward, the greater the force of the valve core of the one-way valve is. The pressure of the second oil outlet channel can be further adjusted and displayed through a pressure gauge. After adjustment, the adjusting screw is fixed with a locking nut.

[0009] Furthermore, the outlet valve block is provided with a mounting through hole, the front side of the central transition block is provided with a connecting hole, and the outlet valve block is fixedly connected to the central transition block by screws that pass through the mounting through hole and the connecting hole in sequence. The rear end of the screw passes through the mounting through hole backwards and extends into the connecting hole, pressing the outlet valve block onto the central transition block, which is not only convenient for connection, but also ensures the sealing effect between the outlet valve block and the central transition block, and when replacing the outlet valve block, it is only necessary to loosen the screws and remove it, and then tighten the replaced outlet valve block onto the central transition block with the screws.

[0010] Furthermore, a first sealing mechanism is provided between the first oil outlet channel and the second oil outlet channel, and a second sealing mechanism is provided between the first oil return channel and the second oil return channel. The first sealing mechanism and the second sealing mechanism adopt a sealing ring structure, and when the outlet valve block and the central transition block are fixedly connected, the outlet valve block and the central transition block press the sealing ring to prevent oil from leaking from the joint surface of the central transition block and the outlet valve block.

[0011] Furthermore, the first oil outlet passage includes a first oil outlet section arranged along the front-to-back direction and a second oil outlet section arranged along the left-to-right direction. The first oil outlet section is made from front to back inward by a drilling machine, and the second oil outlet section is made from left to right inward by a drilling machine and is connected to the first oil outlet section, so the processing is relatively convenient and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The overall structure of the utility model is shown in FIG. Figure 1 ;

[0013] Figure 2 The overall structure of the utility model is shown in FIG. Figure 2 ;

[0014] Figure 3 This is a schematic diagram of the structure of the central transition block in the utility model;

[0015] Figure 4 It is a schematic diagram of the cross-sectional structure of the central transition block in the utility model;

[0016] Figure 5 The cross-sectional structure of the outlet valve block in the utility model is shown in FIG. Figure 1 ;

[0017] Figure 6 The cross-sectional structure of the outlet valve block in the utility model is shown in FIG. Figure 2 . DETAILED DESCRIPTION

[0018] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0019] like Figures 1 to 6 As shown, a compact hydraulic pump station includes a fixed platform 1, a motor 2, a central transition block 3 and an oil tank 4 with a gear pump 5. The central transition block 3 and the motor 2 are fixedly arranged on the fixed platform 1 from bottom to top, and the oil tank 4 is fixedly arranged at the bottom of the fixed platform 1. A first oil return port (not shown) is opened on the oil tank 4. The motor shaft of the motor 2 passes downward through the central transition block 3 and is connected to the gear pump 5. The gears of the gear pump 5 are meshed with the motor shaft. When the motor shaft is working, the gears are driven to rotate, thereby driving the oil from the oil tank 4 to enter the oil inlet of the gear pump 5.

[0020] The central transition block 3 is provided with an oil inlet channel 31, a first oil outlet channel 32 and a first oil return channel 33 connected to a first oil return port (not shown). Here, the first oil outlet channel 32 is formed into a first oil outlet section 321 arranged along the front-to-back direction and a second oil outlet section 322 arranged along the left-to-right direction, so that the processing is more convenient and faster.

[0021] The inner cavity of the oil inlet channel 31 is connected with the oil outlet of the gear pump 5 through the oil supply channel 34. One end of the oil inlet channel 31 forms an overflow valve cavity 311 with an overflow valve 6. One end of the overflow valve 6 extends outward from the central transition block 3 and the extended portion is provided with a valve core driving device. The valve core of the overflow valve 6 is movably arranged at the other end of the overflow valve cavity 311. The valve core driving device includes an adjusting screw 61 and a locking nut 62. One end of the valve core of the overflow valve 6 is provided with a connecting screw hole. The inner end of the adjusting screw 61 is screwed and arranged in the connecting screw hole. The outer end of the adjusting screw 61 extends outward from the central transition block 3. The locking nut 62 is screwed on the portion of the adjusting screw 61 extending out of the central transition block 3. The more the adjusting screw 61 pushes the valve core inward, the greater the force of the valve core of the one-way valve 7 is. The pressure of the second oil outlet channel 81 can be further adjusted and displayed by the pressure gauge 9. After adjustment, the adjusting screw 61 is fixed by the locking nut 62.

[0022] A one-way valve chamber 312 with a one-way valve 7 is formed between the other end of the oil inlet channel 31 and one end of the first oil outlet channel 32. The one-way valve 7 is used to control the oil to flow from the oil inlet channel 31 to the first oil outlet channel 32 in one direction.

[0023] The front side of the central transition block 3 is detachably provided with an outlet valve block 8, in which a second oil outlet channel 81, a second oil return channel 82 and a mounting through hole 83 are provided, and a first oil outlet port 35 and a second oil return port 36 connecting hole 37 are provided at the front end of the central transition block 3, and the outlet valve block 8 is fixedly connected to the central transition block 3 by screws 84 passing through the mounting through hole 83 and the connecting hole 37 in sequence; the first oil outlet channel 32 is sealedly connected to the second oil outlet channel 81 through the first oil outlet port 35 and is internally communicated, the first oil return channel 33 is sealedly connected to the second oil return channel 82 through the second oil return port 36 and is internally communicated, and a pressure gauge 9 is fixedly provided in the second oil outlet channel 81;

[0024] A first sealing mechanism 85 is provided between the first oil outlet channel 32 and the second oil outlet channel 81, and a second sealing mechanism 86 is provided between the first oil return channel 33 and the second oil return channel 82; the first sealing mechanism 85 and the second sealing mechanism 86 adopt a sealing ring structure, and the rear end of the screw 84 passes through the installation through hole 83 backward and extends into the connecting hole 37, pressing the outlet valve block 8 onto the central transition block 3, and at the same time, the outlet valve block 8 and the central transition block 3 press the sealing ring tightly;

[0025] A positioning mechanism may be provided on the central transition block 3, such as a conventional structure such as a positioning seat and a positioning groove or a combination of several positioning blocks, to facilitate the positioning of the outlet valve block 8, thereby facilitating the alignment of the first oil outlet channel 32 on the central transition block 3 and the second oil outlet channel 81 on the outlet valve block 8, and the first oil return channel 33 on the central transition block 3 and the second oil return channel 82 on the outlet valve block 8;

[0026] Here, the second oil outlet channel 81 is formed into a third oil outlet section 811 arranged along the front-to-back direction, a fourth oil outlet section 812 arranged along the left-to-right direction, and a fifth oil outlet section 813 arranged along the front-to-back direction, and the second oil return channel 82 is formed into a first oil return section 821 arranged along the front-to-back direction, a second oil return section 822 arranged along the left-to-right direction, and a third oil return section 823 arranged along the front-to-back direction. The second oil outlet channel 81 and the second oil return channel 82 thus formed are easier to process.

[0027] The working principle of the utility model is as follows: the oil inlet of the gear pump 5 is also provided with a gasoline filter element for filtering the oil in the oil tank 4. The motor 2 drives the gear pump 5 to rotate, and the gear pump 5 sucks the oil from the oil tank 4 and enters the oil inlet channel 31 through the oil supply channel 34. The valve core of the relief valve 6 is pushed inward by the adjusting screw 61 to increase the pressure of the oil in the oil inlet channel 31, thereby pushing open the valve core of the check valve 7, so that the oil enters the first oil outlet channel 32 and the second oil outlet channel 81 from the oil inlet channel 31 in turn. If the pressure If the pressure displayed on the pressure gauge 9 is greater than the preset value, the adjusting screw 61 is adjusted outwards; if the pressure displayed on the pressure gauge 9 is less than the preset value, the adjusting screw 61 is adjusted inwards until the pressure displayed on the pressure gauge 9 reaches the preset value, and the adjusting screw 61 is fixed with the locking nut 62, and the oil enters the external oil cylinder from the second oil outlet channel 81; the oil from the external oil cylinder enters the oil tank 4 from the second oil return channel 82, the first oil return channel 33 and the first oil return port (not shown) in turn, completing the driving of the external oil cylinder;

[0028] When the motor 2 stops working, the oil in the oil inlet channel 31 cannot push open the valve core of the one-way valve 7, so the oil in the first oil outlet channel 32 cannot flow back into the oil inlet channel 31, thereby protecting the gear pump 5.

Claims

1. A compact hydraulic pump station, comprising a fixed platform, a motor, a central transition block and an oil tank with a gear pump, wherein the central transition block and the motor are fixedly arranged on the fixed platform from bottom to top, the oil tank is fixedly arranged at the bottom of the fixed platform, a first oil return port is opened on the oil tank, and a motor shaft of the motor passes downward through the central transition block and is connected to the gear pump, Features An oil inlet channel, a first oil outlet channel and a first oil return channel connected to the first oil return port are arranged in the central transition block. The inner cavity of the oil inlet channel is connected to the oil outlet port of the gear pump through the oil supply channel. An overflow valve cavity with an overflow valve is formed at one end of the oil inlet channel. One end of the overflow valve extends outward from the central transition block and a valve core driving device is arranged on the extended part. The valve core of the overflow valve is movably arranged at the other end of the overflow valve cavity. A one-way valve cavity with a one-way valve is formed between the other end of the oil inlet channel and one end of the first oil outlet channel. The one-way valve is used to control the oil to flow from the oil inlet channel into the first oil outlet channel in one direction. An outlet valve block is detachably provided on the front side of the central transition block, a second oil outlet channel and a second oil return channel are provided in the outlet valve block, a first oil outlet port and a second oil return port are provided at the front end of the central transition block, the first oil outlet channel is sealed and connected to the second oil outlet channel through the first oil outlet port and are internally connected, the first oil return channel is sealed and connected to the second oil return channel through the second oil return port and are internally connected, and a pressure gauge is fixedly provided in the second oil outlet channel.

2. A compact hydraulic pump station according to claim 1, characterized in that The valve core driving device includes an adjusting screw and a locking nut. A connecting screw hole is provided at one end of the valve core of the overflow valve. The inner end of the adjusting screw is threadedly arranged in the connecting screw hole. The outer end of the adjusting screw extends outward from the central transition block. The locking nut is threadedly connected to the portion of the adjusting screw extending out of the central transition block.

3. A compact hydraulic pump station according to claim 1, characterized in that The outlet valve block is provided with a mounting through hole, the front side of the central transition block is provided with a connecting hole, and the outlet valve block is fixedly connected to the central transition block by screws passing through the mounting through hole and the connecting hole in sequence.

4. A compact hydraulic pump station according to claim 1, characterized in that A first sealing mechanism is provided between the first oil outlet channel and the second oil outlet channel, and a second sealing mechanism is provided between the first oil return channel and the second oil return channel.

5. A compact hydraulic pump station according to claim 1, characterized in that The first oil outlet passage comprises a first oil outlet section arranged along the front-rear direction and a second oil outlet section arranged along the left-right direction.

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