Hydraulic cylinder telsa valve buffer structure

Abstract

The utility model relates to hydraulic cylinder technical field, specifically disclose a kind of hydraulic cylinder Tesla valve buffer structure, including cylinder body, cylinder body is close to two ends and is provided with oil port, piston rod is connected in the middle part of cylinder body, and the one end of piston rod is provided with piston, the inner wall of cylinder body is provided with guide sleeve, the lateral wall of piston rod is provided with connecting cylinder, the lateral wall of connecting cylinder is connected with buffer sleeve, and the inner wall of buffer sleeve is provided with Tesla valve with the lateral wall of connecting cylinder. The flow rate of hydraulic oil is limited by the Tesla valve between the buffer sleeve and the connecting cylinder in the device, so that the piston rod is about to move to limit distance, the flow rate is controlled by Tesla valve, so that the extension of piston rod is more gentle, and other structures will not be impacted by the speed too fast, cause damage.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, and more specifically, to a buffer structure for a Tesla valve in a hydraulic cylinder. Background Technology

[0002] A hydraulic cylinder is a device that uses the injection of hydraulic oil to extend and retract a piston rod, thereby pushing and pulling an object.

[0003] When the existing piston rod extends, it will hit the cylinder head at its limit distance, which will cause it to stop extending further. However, if the piston rod extends too quickly, the impact and collision will be too great, which will damage the cylinder head and other structures in the cylinder. Utility Model Content

[0004] The purpose of this invention is to provide a buffer structure for a Tesla valve in a hydraulic cylinder, which solves the problem that when the piston rod extends out at too high a speed, it can easily cause a large impact and collision on the cylinder head and other structures inside the cylinder, leading to easy damage.

[0005] This utility model is achieved through the following technical solution: This utility model provides a Tesla valve buffer structure for a hydraulic cylinder, including a cylinder body with oil ports near both ends, a piston rod connected to the middle of the cylinder body, a piston at one end of the piston rod, a guide sleeve on the inner wall of the cylinder body, a connecting cylinder on the side wall of the piston rod, a buffer sleeve connected to the side wall of the connecting cylinder, and a Tesla valve on the inner wall of the buffer sleeve and the side wall of the connecting cylinder.

[0006] Preferably, the connecting cylinder is a cylinder with a diameter smaller than that of the piston rod in the middle part, and the side wall of the connecting cylinder is also provided with several annular grooves.

[0007] Preferably, the outer diameter of the buffer sleeve matches the inner diameter of the guide sleeve.

[0008] Preferably, the buffer sleeve further includes a flow gap, which is disposed on the inner wall of the buffer sleeve.

[0009] Preferably, the sidewall of the buffer sleeve is provided with holes that communicate with the flow gap.

[0010] Preferably, the inner wall of the flow gap is provided with a groove, and the annular groove connecting the cylindrical side wall is provided with a groove. The groove of the flow gap and the groove on the annular groove cooperate to form a Tesla valve.

[0011] Preferably, the guide sleeve is located on the inner wall of the cylinder near the oil port.

[0012] Preferably, the diameter of the piston rod is smaller than the inner diameter of the guide sleeve.

[0013] The technical solution of this utility model has at least the following advantages and beneficial effects: 1. The flow rate of hydraulic oil is limited by the Tesla valve between the buffer sleeve and the connecting cylinder in this device. When the piston rod is about to move to the limit distance, the flow rate is controlled by the Tesla valve, so that the extension of the piston rod is more gradual and will not impact the cylinder head and other structures due to excessive speed, thus preventing damage. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0015] Figure 2 This utility model Figure 1 A magnified structural diagram of point A in the middle.

[0016] Figure 3 This is a schematic diagram of the state structure of this utility model.

[0017] Figure 4 This utility model Figure 3 A magnified structural diagram at point B in the middle.

[0018] Reference numerals: 1-Cylinder block, 101-Oil port, 102-Guide sleeve, 2-Piston rod, 201-Piston, 202-Connecting cylinder, 203-Buffer sleeve, 2031-Flow gap, 204-Tesla valve. Detailed Implementation

[0019] The following is combined Figures 1 to 4 This utility model will be described in detail.

[0020] A Tesla valve buffer structure for a hydraulic cylinder includes a cylinder body 1 with oil ports 101 near both ends. A piston rod 2 is connected to the middle of the cylinder body 1, and a piston 201 is provided at one end of the piston rod 2. A guide sleeve 102 is provided on the inner wall of the cylinder body 1. A connecting cylinder 202 is provided on the side wall of the piston rod 2. A buffer sleeve 203 is connected to the side wall of the connecting cylinder 202. A Tesla valve 204 is provided on the inner wall of the buffer sleeve 203 and the side wall of the connecting cylinder 202. The connecting cylinder 202 is a cylinder with a diameter smaller than that of the piston rod 2 in the middle part, and the side wall of the connecting cylinder 202 is also provided with several annular grooves. The outer diameter of the buffer sleeve 203 matches the inner diameter of the guide sleeve 102.

[0021] Furthermore, the buffer sleeve 203 also includes a flow gap 2031, which is disposed on the inner wall of the buffer sleeve 203. The side wall of the buffer sleeve 203 is provided with a hole communicating with the flow gap 2031. The inner wall of the flow gap 2031 is provided with a groove. The annular groove connecting the side wall of the cylinder 202 is provided with a groove. The groove of the flow gap 2031 and the groove on the annular groove cooperate to form a Tesla valve 204. The guide sleeve 102 is disposed on the inner wall of the cylinder 1 near the oil port 101. The diameter of the piston rod 2 is smaller than the inner diameter of the guide sleeve 102.

[0022] First, when the piston rod 2 needs to extend, hydraulic oil is discharged from the oil port 101 near one end, allowing the piston rod 2 to extend. When the piston rod 2 extends a certain distance, the buffer sleeve 203 connected to the cylinder 202 on the side wall will fit against the inner wall of the guide sleeve 102, preventing the hydraulic oil from entering the oil port 101 from the outside of the buffer sleeve 203. The hydraulic oil can only flow from the flow gap 2031 near the piston 201 to the other end and then into the oil port 101. When the hydraulic oil passes through the flow gap 2031, it will pass through the Tesla valve 204 formed by the inner wall of the flow gap 2031 and the groove on the side wall of the connecting cylinder 202. Due to the change in the flow channel shape and the increase in the reverse flow resistance, the flow rate is significantly reduced, forming an effective throttling effect. This allows the piston rod 2 to reduce its speed when it is about to move to the limit distance, making the speed smooth and preventing the speed from hitting the cylinder end cover too fast, causing damage to the cylinder end cover or structural components.

[0023] When the piston rod 2 needs to retract, the hydraulic oil can only pass through the flow gap 2031. The Tesla valve 204, due to its inherent characteristics, will not be significantly obstructed when flowing in the opposite direction, thus ensuring that the retraction speed of the piston rod 2 is not affected.

[0024] The following is a detailed implementation process of this utility model. First, when the piston rod 2 needs to extend, hydraulic oil is discharged from the oil port 101 near one end, allowing the piston rod 2 to extend. When the piston rod 2 extends a certain distance, the buffer sleeve 203 connected to the side wall connecting cylinder 202 will fit against the inner wall of the guide sleeve 102, preventing hydraulic oil from entering the oil port 101 from the outside of the buffer sleeve 203. Instead, the hydraulic oil can only flow from the flow gap 2031 near the piston 201 of the buffer sleeve 203 to the other end and then into the oil port 101. When the hydraulic oil passes through the flow gap 2031, it will pass through the flow gap 20... The Tesla valve 204, which is formed by the inner wall of 31 and the side wall groove of the connecting cylinder 202, significantly reduces the flow velocity due to the change in the flow channel shape and the increase in the reverse flow resistance, thus forming an effective throttling effect. This allows the piston rod 2 to slow down when it is about to move to the limit distance, making the speed smooth and preventing the excessive speed from impacting the cylinder end cover and causing damage to the cylinder end cover or structural components. When the piston rod 2 needs to retract, the hydraulic oil can only pass through the flow gap 2031. The Tesla valve 204 itself does not encounter excessive resistance when flowing in the opposite direction, so the retraction speed of the piston rod 2 is not affected.

Claims

1. A Tesla valve buffer structure for a hydraulic cylinder, comprising a cylinder body (1), wherein oil ports (101) are provided near both ends of the cylinder body (1), a piston rod (2) is connected to the middle of the cylinder body (1), and a piston (201) is provided at one end of the piston rod (2), characterized in that, The inner wall of the cylinder (1) is provided with a guide sleeve (102), the side wall of the piston rod (2) is provided with a connecting cylinder (202), the side wall of the connecting cylinder (202) is connected with a buffer sleeve (203), and the inner wall of the buffer sleeve (203) and the side wall of the connecting cylinder (202) are provided with a Tesla valve (204).

2. The hydraulic cylinder Tesla valve buffer structure according to claim 1 is characterized in that the connecting cylinder (202) is a cylinder with a diameter smaller than that of the piston rod (2) in the middle part, and the side wall of the connecting cylinder (202) is also provided with several annular grooves.

3. The buffer structure of a hydraulic cylinder Tesla valve according to claim 1 is characterized in that the outer diameter of the buffer sleeve (203) matches the inner diameter of the guide sleeve (102).

4. The buffer structure of a hydraulic cylinder Tesla valve according to claim 1 is characterized in that the buffer sleeve (203) further includes a flow gap (2031), which is disposed on the inner wall of the buffer sleeve (203).

5. A hydraulic cylinder Tesla valve buffer structure according to claim 4, characterized in that the buffer sleeve (203) has a hole on its side wall that communicates with the flow gap (2031).

6. The buffer structure of a hydraulic cylinder Tesla valve according to claim 4 is characterized in that the inner wall of the flow gap (2031) is provided with a groove, the annular groove of the side wall of the connecting cylinder (202) is provided with a groove, and the groove of the flow gap (2031) and the groove on the annular groove cooperate to form a Tesla valve (204).

7. The hydraulic cylinder Tesla valve buffer structure according to claim 1 is characterized in that the guide sleeve (102) is disposed on the inner wall of the cylinder body (1) near the oil port (101).

8. The hydraulic cylinder Tesla valve buffer structure according to claim 1 is characterized in that the diameter of the piston rod (2) is smaller than the inner diameter of the guide sleeve (102).

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