A hydraulic oil top self-locking cylinder device for steel support axial force servo system

Abstract

The present application relates to a kind of hydraulic oil top self-locking cylinder device for steel support axial force servo system, including box and the oil cylinder being installed in the box, the oil cylinder includes oil top piston, support end head is arranged at the end of the oil top piston, outer thread is machined on the surface of the oil top piston, gear self-locking mechanism that cooperates with the oil top piston is also provided in the box, the gear self-locking mechanism includes self-locking nut, the self-locking nut is machined with the thread of the outer thread of the surface of the oil top piston cooperation, the self-locking nut is driven by drive unit, and oil top piston is moved by driving.The self-locking nut thread lock structure of the present application improves the locking setting of self-locking cylinder device, avoids the problems that traditional ratchet self-locking oil top piston is jammed, cannot be smoothly relieved to oil top, is smoothly disassembled, and is conveniently adjusted.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of foundation pit support, in particular to a hydraulic oil top self-locking cylinder device for a steel support axial force servo system. BACKGROUND

[0002] Due to the superior product characteristics of the hydraulic cylinder, it is widely used in foundation pit support. The hydraulic cylinder has the functions of jacking and tensioning, and generates very large jacking force during its operation. However, there is also the characteristic of internal leakage of the cylinder, and there is also a certain gap between the cylinder piston and the cylinder sleeve. Hydraulic leakage is also unavoidable, so the traditional cylinder cannot achieve precise control of the position during the jacking or retraction operation. The currently used locking mechanism adopts a single-acting self-resetting hydraulic cylinder to drive a locking block to lock the piston rod, so that after the cylinder is extended or retracted, the self-resetting block is used to ensure that the piston rod is in an absolutely stable locking state.

[0003] Chinese patent CN108953287A discloses a safe and stable automatic locking cylinder, which comprises a large cylinder and a small cylinder, the small cylinder is arranged in the large cylinder, the piston of the large cylinder is connected with the aligning support seat, and the outer periphery of the piston is provided with a ratchet, and a locking ratchet block matched with the ratchet is arranged on the outer periphery of the piston, the inner side of the locking ratchet block is arc-shaped, and a plurality of locking ratchet blocks are arranged to form a circular ring matched with the outer periphery of the piston, so as to lock the piston. However, after the foundation pit support pressure is applied, the ratchet self-locking often causes the jacking piston to be stuck, and the jacking piston cannot be smoothly depressurized during disassembly, which causes the disassembly to be not smooth and delays the construction period. SUMMARY

[0004] The purpose of the present application is to provide a hydraulic oil top self-locking cylinder device for a steel support axial force servo system.

[0005] The purpose of the present application is achieved by the following technical solutions:

[0006] A hydraulic oil top self-locking cylinder device for a steel support axial force servo system, comprising a box body and an oil cylinder mounted in the box body, the oil cylinder comprising an oil top piston, a support end being arranged at the end of the oil top piston, and an external thread being processed on the surface of the oil top piston,

[0007] A gear self-locking mechanism matched with the oil top piston is further arranged in the box body, the gear self-locking mechanism comprising a self-locking nut, the self-locking nut being processed with a thread matched with the external thread on the surface of the oil top piston, and the self-locking nut being driven by a driving unit and moving the oil top piston.

[0008] The self-locking nut thread locking structure improves the locking setting of the self-locking cylinder device, avoids the problems that the traditional ratchet self-locking causes the oil jack piston to be stuck and unable to smoothly release pressure on the oil jack, and facilitates disassembly and adjustment.

[0009] Further, the driving unit is a hydraulic motor.

[0010] Further, the output power of the hydraulic motor is matched with the rotation speed of the oil jack piston.

[0011] Further, the self-locking nut is a high-strength steel nut, and the outer diameter of the self-locking nut is processed with a gear.

[0012] Further, the axial direction of the self-locking nut is perpendicular to the axial direction of the oil jack piston.

[0013] Further, the driving unit is arranged on both sides of the self-locking nut through a transmission shaft.

[0014] Further, the support end extends out of the box body.

[0015] Further, the support end is in a circular structure.

[0016] Further, the support end is fixed or integrally formed on the end of the oil jack piston.

[0017] Further, one end of the oil cylinder is mounted on the top plate of the box body, and a top plate reinforcing rib is arranged, and a support rod is further arranged between the oil cylinder and the box body.

[0018] The specific working principle of the hydraulic oil jack self-locking cylinder device is that external threads are processed on the surface of the oil jack piston, and are matched with a gear self-locking mechanism, the self-locking nut is driven to rotate by the hydraulic motor, the adjustment of the oil jack piston is realized, the oil jack piston is moved forward during pressurization, the hydraulic motor is driven to rotate, the piston is extended, the oil jack piston is moved backward during pressure release, the hydraulic motor is reversed, the threaded lock cooperated with the hydraulic motor can improve the stuck state caused by disassembly of the oil jack, avoid the problems that the traditional ratchet self-locking causes the oil jack piston to be stuck and unable to smoothly release pressure on the oil jack, and facilitate disassembly and adjustment.

[0019] Compared with the prior art, the present application has the following advantages:

[0020] 1. The oil jack ratchet lock is replaced by a thread, a high-strength steel nut with threads is added to the end of the oil jack piston, and a hydraulic motor is added to the machine body to drive the steel nut to rotate, drive the extension and retraction of the oil jack piston, adjust the output power of the hydraulic motor to follow the rotation speed of the oil jack piston, improve the stuck state caused by disassembly of the oil jack, and improve the construction efficiency.

[0021] 2. The cooperation of the steel nut and the oil jack piston can improve the accuracy of the oil cylinder pressure adjustment. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the hydraulic oil top self-locking cylinder device of the present invention;

[0023] Figure 2 , 3 for Figure 1 Internal structure diagram;

[0024] In the diagram: 1-box body; 2-oil top piston; 3-support end; 4-self-locking nut; 5-drive unit; 6-oil cylinder. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0026] like Figures 1-3 A hydraulic self-locking cylinder device for a steel support axial force servo system includes a housing 1 and a cylinder 6 installed inside the housing 1. The cylinder 6 includes a top piston 2, with a support end 3 at its end. External threads are machined onto the surface of the top piston 2. The housing 1 also includes a gear self-locking mechanism that meshes with the top piston 2. The gear self-locking mechanism includes a self-locking nut 4, which is machined with threads that mesh with the external threads on the surface of the top piston 2. The self-locking nut 4 is driven by a drive unit 5, which is a hydraulic motor. The output power of the hydraulic motor matches the rotational speed of the top piston 2. The self-locking nut 4 is a high-strength steel nut, and gears are machined onto its outer diameter. The axial direction of the self-locking nut 4 is perpendicular to the axial direction of the top piston 2. The drive unit 5 is located on both sides of the self-locking nut 4 via a transmission shaft. The support end 3 extends out of the housing 1 and has a circular structure. The support end 3 is fixed or integrally formed to the end of the top piston 2. One end of the hydraulic cylinder 6 is installed on the top plate of the housing 1, and a top plate tie rod is provided. A support rod (not shown in the figure) is also provided between the hydraulic cylinder 6 and the housing 1, which can increase the connection strength between the hydraulic cylinder 6 and the housing 1.

[0027] The specific working principle of the hydraulic jack self-locking cylinder device of the present invention is as follows: by machining external threads on the surface of the jack piston 2 and cooperating with the gear self-locking mechanism, the self-locking nut 4 is driven to rotate by the hydraulic motor to realize the adjustment of the jack piston 2. When pressurizing, the jack piston 2 moves forward, the hydraulic motor rotates forward and drives the gear nut to rotate, and the piston extends. When depressurizing, the jack piston 2 moves backward, and the hydraulic motor reverses. The use of a hydraulic motor in conjunction with a threaded lock can improve the jamming state caused by disassembling the jack, and avoid the problem of the traditional ratchet self-locking mechanism jamming the jack piston and failing to release pressure smoothly. Disassembly is smooth and adjustment is convenient.

[0028] The foregoing description of the embodiments has been presented for the purpose of illustration and description. It is not intended to be exhaustive or to limit the application to the precise form disclosed. Modifications and variations are possible in light of the above teachings or can be acquired from practice of the application. As well, the description is presented in the context of the preferred embodiments as a number of alternatives. It is not intended to limit the application to the precise form described.

Claims

1. A hydraulic oil top self-locking cylinder device for a steel support axial force servo system, characterized by, Including box and installing oil cylinder in the box, the oil cylinder includes oil top piston, the oil top piston end supports end head, the oil top piston surface processes outer thread, The box is also provided with a gear self-locking mechanism matched with the oil top piston, the gear self-locking mechanism includes a self-locking nut, the self-locking nut is processed with the thread matched with the outer thread of the oil top piston surface, the self-locking nut is driven by a driving unit and moves the oil top piston; The self-locking nut is a high-strength steel nut, and the outer diameter of the self-locking nut is processed with a gear; The axial direction of the self-locking nut is perpendicular to the axial direction of the oil top piston; The driving unit is arranged on both sides of the self-locking nut through a transmission shaft; The support end head extends out of the box; The driving unit is a hydraulic motor; The output power of the hydraulic motor matches the rotation speed of the oil top piston; The support end head is integrated with the end of the oil top piston; One end of the oil cylinder is installed on the top plate of the box, and the top plate is provided with a pull bar, and a support rod is arranged between the oil cylinder and the box; By processing the outer thread on the surface of the oil top piston and matching with the gear self-locking mechanism, the self-locking nut is driven to rotate by the hydraulic motor, the adjustment of the oil top piston is realized, the oil top piston moves forward during pressurization, the hydraulic motor rotates in the forward direction to drive the gear nut to rotate, the piston extends, during pressure recovery, the oil top piston moves backward, the hydraulic motor reverses, and the use of the hydraulic motor combined with the thread lock can improve the stuck state caused by the disassembly of the oil top.

2. The hydraulic oil top self-locking cylinder device for the steel support axial force servo system according to claim 1, wherein the support end head is a circular structure.

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