Pneumatic hydraulic station

Abstract

The utility model provides a pneumatic hydraulic station, and belongs to the technical field of hydraulic stations. The problem that existing exhaust is inconvenient is solved. The pneumatic hydraulic station comprises a main cylinder body, two cylinder covers arranged at the two ends of the main cylinder body respectively and a piston shaft arranged on the main cylinder body and in sliding fit with the main cylinder body, a piston ring integrally arranged with the piston shaft is arranged on the piston shaft, and through holes allowing piston rods to axially penetrate through are formed in the cylinder covers. The cylinder cover is provided with an outer cylinder body which is connected with the cylinder cover and matched with the piston rod, the cylinder cover is provided with a discharging assembly which is connected with the cylinder cover due to expectation and used for discharging redundant gas in the main cylinder body, and the discharging assembly comprises a discharging unit used for discharging gas and an assembling unit matched with the discharging unit. A buffering unit with the two ends abutting against the corresponding cylinder cover and the piston ring is arranged in the main cylinder body, and the buffering unit plays a buffering role. The exhaust valve has the advantage of smooth exhaust.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic station technology and relates to a pneumatic hydraulic station. Background Technology

[0002] A hydraulic pump station is a hydraulic power source device or a hydraulic device including control valves, consisting of a hydraulic pump, a drive motor, an oil tank, directional valves, throttle valves, and relief valves. It supplies oil according to the flow direction, pressure, and flow rate required by the drive device. It is suitable for various machines where the drive device and the hydraulic station are separate. By connecting the hydraulic station to the drive device (cylinder or motor) with oil pipes, the hydraulic system can achieve various specified actions. During use, hydraulic pumps generally need to vent internal gases, usually through an air vent. However, in actual use, the air vent may become blocked, leading to poor venting and affecting the normal operation of the hydraulic station, or even causing damage. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a hydraulic station with smoother exhaust.

[0004] The objective of this utility model can be achieved through the following technical solution: A pneumatic hydraulic station includes a main cylinder body, two cylinder heads respectively disposed at both ends of the main cylinder body, and a piston shaft disposed on the main cylinder body and slidably engaged therewith. A piston ring integrally formed therewith is disposed on the piston shaft. Each cylinder head has a through hole for the axial passage and installation of the piston rod. An outer cylinder body connected to and engaged with the piston rod is disposed on the cylinder head. The cylinder head is characterized by a discharge assembly for discharging excess gas from the main cylinder body, which is intended to be connected to the outer cylinder head. The discharge assembly includes a discharge unit for discharging gas and an assembly unit engaged with the discharge unit. A buffer unit is disposed within the main cylinder body, with both ends respectively contacting the corresponding cylinder head and piston ring and providing a buffering effect.

[0005] In the aforementioned pneumatic hydraulic station, the cylinder head is provided with an axially penetrating assembly hole for installing the discharge assembly.

[0006] In the aforementioned pneumatic-hydraulic station, the assembly unit includes a stud threadedly connected to an assembly hole, and the inner end face of the stud has an axially inwardly recessed groove for the movement of the discharge unit.

[0007] In the aforementioned pneumatic-hydraulic station, the discharge unit includes a discharge pin that slides with the assembly hole. The cylinder head has two exhaust holes on its outer peripheral wall at the corresponding assembly hole, which are connected to the assembly hole for venting. The discharge pin is fitted with a sealing ring for enhancing sealing.

[0008] In the aforementioned pneumatic hydraulic station, the inner end of the discharge pin is provided with an anti-wear unit that is connected to and reduces wear from collision with the piston ring. The anti-wear unit includes an abutment rod connected to the discharge pin and an assembly ring connected to the main cylinder and slidably engaged with the abutment rod. The assembly ring has a sliding hole for the abutment rod to slide into. The inner end of the abutment rod is fitted with a rubber block connected thereto.

[0009] In the aforementioned pneumatic hydraulic station, the cylinder head is provided with a sealing cover connected to and used for sealing at the corresponding exhaust port.

[0010] In the aforementioned pneumatic hydraulic station, the buffer unit includes a buffer spring, the two ends of which abut against the cylinder head and piston rings, respectively.

[0011] Compared with existing technologies, this pneumatic hydraulic station achieves smoother exhaust by incorporating an exhaust unit. Attached Figure Description

[0012] Figure 1 This is a cross-sectional structural diagram of the pneumatic-hydraulic power unit.

[0013] In the diagram, 1. Main cylinder block; 2. Cylinder head; 3. Piston shaft; 4. Piston ring; 5. Stud; 6. Exhaust pin; 7. Abutment rod; 8. Rubber block; 9. Buffer spring. Detailed Implementation

[0014] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0015] like Figure 1As shown, this pneumatic-hydraulic power unit includes a main cylinder body 1, two cylinder heads 2 respectively disposed at both ends of the main cylinder body 1, and a piston shaft 3 disposed on and slidably engaged with the main cylinder body 1. The piston shaft 3 is provided with piston rings 4 integrally formed therewith. Each cylinder head 2 has a through hole for the axial passage of the piston rod. An outer cylinder body is disposed on the cylinder head 2 and connected to and engaged with the piston rod. A discharge assembly is disposed on the cylinder head 2 for discharging excess gas from the main cylinder body 1, and the discharge assembly includes a discharge unit for discharging gas and an assembly unit that engages with the discharge unit. A buffer unit is disposed inside the main cylinder body 1, with its two ends respectively contacting the corresponding cylinder head 2 and piston ring 4, providing a buffering effect. The assembly unit includes a buffer unit that engages with the piston rings 4. The stud 5 is connected to the threaded hole. The inner end face of the stud 5 has an axially recessed groove for the movement of the discharge unit. The assembly hole has a multi-stage stepped structure, consisting of a threaded portion and a smooth portion. The discharge unit includes a discharge pin 6 that slides with the assembly hole. The cylinder head 2 has two exhaust holes on its outer peripheral wall corresponding to the assembly hole, which are connected to the assembly hole. The two exhaust holes are located on the threaded portion and the smooth portion of the assembly hole, respectively. A sealing ring is fitted onto the discharge pin 6 to enhance sealing. This sealing ring is located inside the exhaust hole. When the exhaust pin moves axially, it is moved between the two exhaust holes. The exhaust pin has an annular groove for the sealing ring to be embedded in. The discharge pin 6 is located on the threaded portion. The outer peripheral wall of the exhaust pin 6 is provided with a radially outward protrusion that prevents the exhaust pin from entering the main cylinder 1. A wear-resistant ring to reduce impact wear is fitted on the outer peripheral wall of the exhaust pin at the location of the limiting protrusion. The inner end of the exhaust pin 6 is provided with a wear-resistant unit that connects to and reduces impact wear with the piston ring 4. This wear-resistant unit includes an abutment rod 7 connected to the exhaust pin 6 and an assembly ring connected to the main cylinder 1 and slidingly engaged with the abutment rod 7. The assembly ring has a sliding hole for the abutment rod 7 to slide into. A rubber block 8 is fitted on the inner end of the abutment rod 7. A radially inward protrusion for limiting the assembly ring can be provided inside the main cylinder 1, and an abutment protrusion connected to and abutting the assembly ring can be provided on the inner end face of the cylinder head 2. The abutment protrusion can also be threaded onto the main cylinder 1. When venting is required, the pressure difference drives the vent pin to move, causing the sealing ring in the vent pin to move between the two vent holes for venting. After venting is complete, the hydraulic pump station resets, and the vent pin is also reset by the pressure difference, thus forming a seal. The abutment rod 7 is used to limit its maximum stroke, thereby adjusting the stroke and ensuring its service life, while also ensuring smoother movement of the vent pin. The cylinder head 2 can be equipped with a sealing cover connected to the corresponding vent hole for sealing. When venting is required, the sealing cover can be removed to prevent dust from entering. This sealing cover can be replaced with a one-way valve structure, and the opening and closing of the one-way valve is also controlled by the pressure difference. The buffer unit includes a buffer spring 9.The two ends of the buffer spring 9 abut against the cylinder head 2 and the piston ring 4, respectively.

[0016] As a preferred structure, the cylinder head 2 is provided with an axially penetrating mounting hole for installing the discharge assembly. The number of mounting holes is set according to the actual discharge assembly.

[0017] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0018] Although this document uses terms such as "etc." extensively, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A pneumatic hydraulic power unit, comprising a main cylinder body (1), two cylinder heads (2) respectively disposed at both ends of the main cylinder body (1), and a piston shaft (3) disposed on the main cylinder body (1) and slidably engaged therewith, wherein a piston ring (4) integrally formed thereon is disposed on the piston shaft (3), each cylinder head (2) having a through hole for axially passing through and mounting a piston rod, and an outer cylinder body connected thereto and engaging with the piston rod, characterized in that, The cylinder head (2) is provided with a discharge assembly for discharging excess gas from the main cylinder (1) and is intended to be connected to it. The discharge assembly includes a discharge unit for discharging gas and an assembly unit that cooperates with the discharge unit. The main cylinder (1) is provided with a buffer unit whose two ends respectively abut against the corresponding cylinder head (2) and piston ring (4) and play a buffering role.

2. A pneumatic hydraulic power unit according to claim 1, characterized in that, The cylinder head (2) is provided with an axial through-hole for the installation of the discharge assembly.

3. A pneumatic-hydraulic power unit according to claim 1, characterized in that, The assembly unit includes a stud (5) that is threadedly connected to the assembly hole. The inner end face of the stud (5) has an axially recessed groove for the movement of the discharge unit.

4. A pneumatic-hydraulic power unit according to claim 1, characterized in that, The discharge unit includes a discharge pin (6) that slides with the assembly hole. The cylinder head (2) has two exhaust holes on its outer peripheral wall at the corresponding assembly hole that are connected to the assembly hole. The discharge pin (6) is provided with a sealing ring for enhancing the sealing performance.

5. A pneumatic-hydraulic power unit according to claim 4, characterized in that, The inner end of the discharge pin (6) is provided with an anti-wear unit that is connected to and can reduce the collision and wear with the piston ring (4). The anti-wear unit includes an abutment rod (7) connected to the discharge pin (6) and an assembly ring connected to the main cylinder (1) and slidingly engaged with the abutment rod (7). The assembly ring is provided with a sliding hole for the abutment rod (7) to slide into. The inner end of the abutment rod (7) is fitted with a rubber block (8) connected to it.

6. A pneumatic-hydraulic power unit according to claim 1, characterized in that, The cylinder head (2) is provided with a sealing cover connected to and used for sealing at the corresponding exhaust port.

7. A pneumatic-hydraulic power unit according to claim 1, characterized in that, The buffer unit includes a buffer spring (9), the two ends of which abut against the cylinder head (2) and the piston ring (4) respectively.

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