Mechanical locking hydraulic oil cylinder

Abstract

The invention discloses a mechanical locking hydraulic oil cylinder, which relates to the technical field of hydraulic devices, and comprises a cylinder body assembly and a locking assembly I, the cylinder body assembly comprises a cylinder body, a piston rod, a communicating pipe, a sliding barrel, a check block and a second spring. The piston rod and the sliding barrel are arranged in the cylinder body in a sliding manner; the first locking assembly comprises a fixing ring and a limiting piece. The limiting piece comprises a first telescopic rod, a first spring and a clamping block. A baffle block and a fixing ring are fixed on the piston rod; two ends of a telescopic rod I are respectively arranged on the fixing ring and the telescopic rod I; the sliding cylinder is located between the two check blocks. Piston rod slippage caused by internal leakage of a hydraulic system can be completely avoided through a mechanical locking mechanism, and the reliability and safety of equipment are improved; in the shutdown state, the clamping block is completely attached to the check block, friction force is generated, and the piston rod can be effectively prevented from accidentally extending outwards; the electromagnetic valve and the second spring enable the sliding cylinder to automatically reset during shutdown.

Description

Technical Field

[0001] This invention relates to the field of hydraulic device technology, and in particular to a mechanical locking hydraulic cylinder. Background Technology

[0002] Hydraulic cylinders, as core actuators that convert hydraulic energy into mechanical linear motion, are widely used in various industrial equipment and engineering machinery requiring heavy-duty pushing and pulling, precise positioning, or long-term locking, such as platform leveling devices, machine tool guideway locking devices, rolling mill pressing mechanisms, and radar antenna elevation positioning devices. In these applications, the piston rod of the hydraulic cylinder often needs to be reliably locked at a specific position during its extension and retraction stroke to prevent accidental displacement under external forces, thereby ensuring the operational accuracy, stability, and safety of the equipment.

[0003] Currently, the mainstream technical solution for achieving hydraulic cylinder locking is to use a hydraulic locking circuit, which integrates hydraulically controlled one-way valves and other components into the hydraulic system's oil circuit. When locking is required, the oil circuit between the two chambers of the cylinder is cut off, and the oil is sealed inside the cylinder using the sealing property of the one-way valve, theoretically fixing the piston rod. However, this purely hydraulic locking method has an inherent and difficult-to-overcome technical defect: leakage within the hydraulic system.

[0004] Leaks can occur at the piston seals within the cylinder itself, at the joint between the cylinder barrel and piston rod, or from various components in the hydraulic circuit, such as connecting pipes and control valve spools. Even minor internal leaks can cause the piston rod to slip or creep under prolonged locking conditions due to the slow flow of hydraulic fluid.

[0005] This piston rod position drift caused by internal leakage can directly lead to machining errors or pointing deviations in equipment requiring high-precision positioning, such as precision machine tools and radar, severely affecting equipment performance. In safety-related equipment, such as heavy-duty supports and safety braking devices, it can cause decreased stability or even safety accidents. Furthermore, to maintain the locked state, the system may need to continuously provide pressure to compensate for the leakage, increasing energy consumption. Summary of the Invention

[0006] This application provides a mechanically locking hydraulic cylinder, which solves the problem in the prior art where oil leakage from internal components of hydraulic systems is unavoidable, leading to hydraulic leakage after prolonged use and causing piston rod slippage, thus affecting the efficiency and safety of the equipment with the hydraulic system installed. The mechanical locking mechanism completely prevents piston rod slippage caused by internal hydraulic system leakage, improving the reliability and safety of the equipment. In the stopped state, the locking block and stop block are fully engaged, generating friction to effectively prevent the piston rod from accidentally extending outwards. The solenoid valve and spring 2 ensure that the sliding cylinder automatically resets when the machine stops, requiring no manual intervention, and the locking block quickly enters the locking position, improving operational convenience.

[0007] This application provides a mechanical locking hydraulic cylinder, including a cylinder body assembly and a locking assembly 1; The cylinder assembly includes the cylinder, piston rod, connecting pipe, sliding cylinder, stop block, and spring 2; A sliding cylinder is fitted onto the piston rod, and the piston rod and the sliding cylinder are slidably arranged inside the cylinder. Locking assembly one includes a retaining ring and a limiting component, the limiting component including a telescopic rod one, a spring one and a locking block; The piston rod has a fixed stop and a fixed ring, and the two ends of the telescopic rod are respectively set on the fixed ring and the telescopic rod. There are two stops, and the sliding cylinder is located between the two stops; Spring one has its two ends set on the fixed ring and the locking block, while spring two has its two ends fixed on the stop block and the sliding cylinder; The two ends of the connecting pipe are fixed to the cylinder body, and the two ends of the connecting pipe are located on both sides of the sliding cylinder.

[0008] As an improvement, the cylinder block assembly also includes a solenoid valve, which is fixed to the connecting pipe; The solenoid valve is used to control the connection and closure of the cavities on both sides of the sliding cylinder inside the cylinder. When the entire device is shut down, the solenoid valve opens, spring two resets the sliding cylinder, the sliding cylinder does not contact the locking block, and spring one pushes the locking block into the space between the stop block and the cylinder body.

[0009] As an improvement, the cylinder is a hollow cylinder, the piston rod is cylindrical, and the axis of the piston rod is on the same straight line as the axis of the cylinder. Both the sliding cylinder and the fixed ring are cylindrical shapes that run through their axes. The inner ring of the sliding cylinder is in close contact with the piston rod, and the outer ring of the sliding cylinder is in close contact with the inner wall of the cylinder. The inner ring of the retaining ring is fixed to the outer ring of the piston rod, and the axes of the sliding cylinder and the retaining ring are both on the same straight line as the cylinder axis; The stop block is a frustum-shaped block that runs through its axis. The cross-section of the stop block is triangular. The stop block is located between the fixed ring and the sliding cylinder, with the end of the stop block with the largest outer diameter closest to the sliding cylinder. The cross-section of the card block is triangular; The side of the locking block closest to the stop is an arc shape that fits against it, and the side of the locking block closest to the inner wall of the cylinder is also an arc shape that fits against it.

[0010] As an improvement, when the entire device is stopped, the side of the locking block closest to the stop block is completely in contact.

[0011] As an improvement, a spring set is installed on the telescopic rod; The telescopic rod is rotatably connected to one side of the fixed ring, and the locking block is located at the end of the telescopic rod away from the fixed ring. A torsion spring is fitted on the rotating shaft that rotatably connects the telescopic rod to the fixed ring, and the two ends of the torsion spring are fixed to the telescopic rod and the fixed ring respectively. When the sliding cylinder contacts the locking block, the telescopic rod retracts, and the torsion spring on the rotating shaft connected to the fixed ring drives the locking block to rotate toward the cylinder axis.

[0012] As an improvement, there are multiple limiting components, which are arranged in a ring. There are multiple springs, and these multiple springs are arranged in a ring.

[0013] As an improvement, the cylinder block assembly also includes a communication port, with two communication ports symmetrically opened on the bottom of the cylinder block; The two connecting ports are located on opposite sides of the sliding cylinder; The two ends of the connecting tube are fixed inside the connecting port.

[0014] As an improvement, the cylinder assembly also includes inlet port one, sliding port, inlet port two, sealing ring one, sealing ring two, and sealing ring three; The cylinder body has two liquid inlets, one and two, which are located on both sides of the sliding cylinder. A sliding port is opened at one end of the cylinder block along the axial direction, and the piston rod sliding seal is set in the sliding port; The sliding port and the locking assembly are located on the same side of the sliding cylinder; One sealing ring is fixed to the outer ring of the sliding cylinder, and the other sealing ring is tightly attached to the inner wall of the cylinder. The second sealing ring is fixed to the inner ring of the sliding cylinder, and the second sealing ring is tightly attached to the piston rod; The sealing ring three is fixed to the inner ring of the sliding port, and the sealing ring three is tightly attached to the piston rod.

[0015] As an improvement, locking component two is also included; The structure of locking assembly two is the same as that of locking assembly one; Locking component two is located on the side of the sliding cylinder away from locking component one, and locking component two and locking component one are arranged symmetrically; Locking component two and locking component one correspond to two stops respectively.

[0016] As an improvement, the locking assembly one also includes a fitting component, which includes a mounting plate, a mounting ring, and a telescopic rod two; The fitting is positioned between the telescopic rod and the locking block; The number of fitting parts is consistent with the number of limiting parts, and they correspond one-to-one; The mounting plate is arc-shaped and is fixed to the end of the telescopic rod away from the fixing ring. The end of the spring away from the fixing ring is fixed to the mounting plate. One end of the telescopic rod 2 is fixed to the side of the mounting plate away from the telescopic rod 1, and the other end of the telescopic rod 2 away from the telescopic mounting plate is fixed to the clip. The mounting ring is ring-shaped and made of rubber. Both ends of the mounting ring are fixed to the mounting plate and the clip, respectively. The mounting plate, the locking block, and the mounting ring together form a deformation cavity that is not connected to the outside. The second telescopic rod is located inside the deformation cavity formed by the mounting plate, the locking block, and the mounting ring. The deformation cavity formed by the mounting plate, the locking block, and the mounting ring is filled with hydraulic oil.

[0017] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages: Firstly, the mechanical locking mechanism completely avoids piston rod slippage caused by internal leakage in the hydraulic system, improving the reliability and safety of the equipment. In the stopped state, the locking block and the stop block are fully engaged, generating friction, which can effectively prevent the piston rod from accidentally extending outward. The solenoid valve and spring enable the sliding cylinder to automatically reset when the machine stops, without manual intervention. The locking block can quickly enter the locking position, improving the convenience of operation. Secondly, the two-way locking expands the application range and can prevent inward retraction at the same time, making the hydraulic cylinder suitable for a wider range of scenarios, such as equipment that requires bidirectional fixed position; the two-way locking provides double insurance to prevent the piston rod from moving in any direction, avoiding equipment loss of control or safety accidents. Thirdly, the fitting component, through hydraulic oil compression of the mounting ring, increases the contact area and friction between the locking block and the inner wall of the cylinder and the stop, making the locking more secure. The rubber material of the mounting ring allows it to adapt to the surface shape of the inner wall of the cylinder and the stop, ensuring a tight fit and improving the stability and adaptability of the locking. The enhanced friction effectively prevents the piston rod from fretting or slipping under high-pressure loads; the fitting component reduces hard friction, and the elastic deformation of the mounting ring can absorb some impact, reducing wear. Attached Figure Description

[0018] Figure 1 This is a front sectional view of a mechanical locking hydraulic cylinder according to the present invention; Figure 2 This is a schematic diagram of a single limiting component structure of a mechanical locking hydraulic cylinder according to the present invention; Figure 3This is a schematic diagram of the stop block installation for a mechanical locking hydraulic cylinder according to the present invention; Figure 4 This is a schematic diagram of the installation of the sealing ring three in a mechanical locking hydraulic cylinder according to the present invention; Figure 5 This is a schematic diagram of the retracted state of a single limiting component of a mechanical locking hydraulic cylinder according to the present invention. Figure 1 ; Figure 6 This is a schematic diagram of the retracted state of a single limiting component of a mechanical locking hydraulic cylinder according to the present invention. Figure 2 ; Figure 7 This is a schematic diagram of the installation of a sealing ring for a mechanical locking hydraulic cylinder according to the present invention; Figure 8 This is a schematic diagram of the installation of the locking assembly 2 of a mechanical locking hydraulic cylinder according to the present invention; Figure 9 This is a schematic diagram of the fitting structure of a mechanical locking hydraulic cylinder according to the present invention; Figure 10 This is a schematic diagram of the mounting plate structure for a mechanical locking hydraulic cylinder according to the present invention; Figure 11 This is a schematic diagram of the mounting ring structure of a mechanical locking hydraulic cylinder according to the present invention.

[0019] In the diagram: 100, cylinder assembly; 110, cylinder; 111, inlet 1; 112, sliding port; 113, connecting port; 114, inlet 2; 120, piston rod; 130, connecting pipe; 140, solenoid valve; 150, sliding cylinder; 151, sealing ring 1; 152, sealing ring 2; 160, sealing ring 3; 170, stop block; 180, spring 2; 200, locking assembly 1; 210, fixing ring; 220, limiting component; 221, telescopic rod 1; 222, spring 1; 223, locking block; 230, fitting component; 231, mounting plate; 232, mounting ring; 233, telescopic rod 2; 300, locking assembly 2. Detailed Implementation

[0020] To facilitate understanding of the present invention, a more complete description of this application will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to enable a more thorough and complete understanding of the disclosure of the present invention.

[0021] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] Example 1: As Figures 1-7 As shown, this application discloses a mechanical locking hydraulic cylinder, including a cylinder body assembly 100 and a locking assembly 200; The cylinder assembly 100 includes a cylinder 110, a piston rod 120, a connecting pipe 130, a sliding cylinder 150, a stop block 170, and a second spring 180; The cylinder body 110 is a hollow cylinder, and the piston rod 120 is a cylinder. The axis of the piston rod 120 and the axis of the cylinder body 110 are on the same straight line. A sliding cylinder 150 is sleeved on the piston rod 120, and the piston rod 120 and the sliding cylinder 150 are slidably arranged inside the cylinder body 110; Both the sliding cylinder 150 and the fixed ring 210 are cylindrical shapes that run through their axes. The inner ring of the sliding cylinder 150 is in close contact with the piston rod 120, and the outer ring of the sliding cylinder 150 is in close contact with the inner wall of the cylinder body 110. Specifically, during use, hydraulic oil is injected into the cavities located on both sides of the sliding cylinder 150, thereby pushing the sliding cylinder 150 and the piston rod 120 to move forward or backward.

[0024] The locking assembly 200 includes a retaining ring 210 and a limiting member 220. The limiting member 220 includes a telescopic rod 221, a spring 222, and a locking block 223. The piston rod 120 is fixed with a stop block 170 and a fixed ring 210, and the two ends of the telescopic rod 221 are respectively set on the fixed ring 210 and the telescopic rod 221. There are two stops 170, and the sliding cylinder 150 is located between the two stops 170; The telescopic rod 221 is rotatably connected to one side of the fixed ring 210, and the locking block 223 is located at the end of the telescopic rod 221 away from the fixed ring 210. A torsion spring is fitted on the rotating shaft that rotatably connects the telescopic rod 221 and the fixed ring 210. The two ends of the torsion spring are fixed to the telescopic rod 221 and the fixed ring 210, respectively. When the sliding cylinder 150 contacts the locking block 223, the telescopic rod 221 retracts, and the torsion spring sleeved on the rotating shaft connecting the telescopic rod 221 and the fixed ring 210 drives the locking block 223 to rotate toward the axis of the cylinder body 110.

[0025] Specifically, when hydraulic oil is injected into the cavity of the sliding cylinder 150 away from the locking assembly 200, the cavity of the sliding cylinder 150 with the locking assembly 200 needs to release pressure outward, so that the piston rod 120 can move normally. When hydraulic oil is injected into the cavity of the sliding cylinder 150 away from the locking assembly 200, the hydraulic oil pushes the sliding cylinder 150 to move, causing the sliding cylinder 150 to abut against the locking block 223, pushing the telescopic rod 221 to retract. During the retraction of the telescopic rod 221 and the locking block 223, the torsion spring sleeved on the rotating shaft connecting the telescopic rod 221 and the fixed ring 210 drives the locking block 223 to rotate toward the axis of the cylinder body 110; this prevents the locking block 223 from contacting the inner wall of the cylinder body 110 and causing friction. As the sliding cylinder 150 moves continuously, it abuts against the stop block 170 in front of it, thereby pushing the piston rod 120 outward. When hydraulic oil is injected into the cavity on the side of the sliding cylinder 150 where the locking component 200 is installed, the cavity on the side of the sliding cylinder 150 away from the locking component 200 needs to release pressure outward, so that the piston rod 120 can move normally. When hydraulic oil is injected into the cavity on the side of the sliding cylinder 150 where the locking component 200 is installed, the hydraulic oil pushes the sliding cylinder 150 to move, causing the sliding cylinder 150 to abut against the stop 170 in front of it, thereby pushing the piston rod 120 to retract inward. Furthermore, when the piston rod 120 retracts inward as a whole, there is no structure in front of the locking block 223 to obstruct its movement. Moreover, the locking block 223 can retract backward and move inward through the structure of the telescopic rod 221, the spring 222, and the torsion spring at the rotatable connection of the telescopic rod 221. Therefore, the locking block 223 will not affect the inward retraction process of the piston rod 120.

[0026] The inner ring of the retaining ring 210 is fixed to the outer ring of the piston rod 120, and the axes of the sliding cylinder 150 and the retaining ring 210 are both on the same straight line as the axis of the cylinder body 110; The stop block 170 is a frustum-shaped block that runs through its axis. The cross section of the stop block 170 is triangular. The stop block 170 is located between the fixed ring 210 and the sliding cylinder 150. The end of the stop block 170 with the largest outer diameter is close to the sliding cylinder 150. Spring 1 222 has its two ends set on the fixed ring 210 and the locking block 223, and spring 2 180 has its two ends fixed on the stop block 170 and the sliding cylinder 150; Spring 222 is fitted onto telescopic rod 221; The cross-section of block 223 is triangular; The side of the locking block 223 closest to the stop block 170 is an arc shape that fits against it, and the side of the locking block 223 closest to the inner wall of the cylinder body 110 is also an arc shape that fits against it.

[0027] With the entire device shut down, the side of the locking block 223 closest to the stop block 170 is completely in contact.

[0028] Specifically, when the device is in the overall shutdown state, under the action of telescopic rod 221 and spring 222, the side of the locking block 223 near the stop block 170 can be completely fitted with the stop block 170; through the friction between the stop block 170 and the locking block 223, the piston rod 120 is locked in one direction to prevent the piston rod 120 from being pulled out of the cylinder body 110 after shutdown.

[0029] The cylinder block assembly 100 also includes a solenoid valve 140, which is fixed to the connecting pipe 130; Solenoid valve 140 is used to control the connection and closure of the cavities on both sides of the sliding cylinder 150 inside the cylinder body 110.

[0030] Both ends of the connecting pipe 130 are fixed on the cylinder body 110, and the two ends of the connecting pipe 130 are located on both sides of the sliding cylinder 150.

[0031] When the entire device is shut down, the solenoid valve 140 opens, the second spring 180 resets the sliding cylinder 150, the sliding cylinder 150 does not contact the locking block 223, and the first spring 222 pushes the locking block 223 into the space between the stop block 170 and the cylinder body 110.

[0032] Specifically, when the piston rod 120 needs to be fixed in position as it extends outward, the entire device stops, and the sliding cylinder 150 comes into contact with the locking block 223, preventing the locking block 223 from entering between the stop block 170 and the inner wall of the cylinder 110. The hydraulic oil on both sides of the sliding cylinder 150 cannot be squeezed, making it impossible for the sliding cylinder 150 to move.

[0033] When the solenoid valve 140 is opened, the cavities on both sides of the sliding cylinder 150 inside the cylinder 110 are connected. The sliding cylinder 150 is reset by the elastic force of the springs 180 on both sides of the sliding cylinder 150, so that the sliding cylinder 150 does not abut against the locking block 223. This allows the spring 222 to push the locking block 223 into the space between the stop block 170 and the cylinder 110, so that friction can be generated between the locking block 223, the inner wall of the cylinder 110, and the outer ring of the stop block 170, thereby restricting the position of the piston rod 120.

[0034] There are multiple limiting components 220, and the multiple limiting components 220 are arranged in a ring; There are multiple springs 2 180, and the multiple springs 2 180 are arranged in a ring.

[0035] Specifically, since there are multiple limiting components 220, the friction between the stop 170 and the inner wall of the cylinder 110 can be increased, thereby improving the positional restriction effect on the piston rod 120.

[0036] The cylinder assembly 100 also includes a liquid inlet 111, a sliding port 112, a connecting port 113, a liquid inlet 2 114, a sealing ring 151, a sealing ring 2 152, and a sealing ring 3 160. Two connecting ports 113 are symmetrically opened at the bottom of the cylinder 110. The two connecting ports 113 are located on both sides of the sliding cylinder 150; Both ends of the connecting pipe 130 are fixed inside the connecting port 113; The cylinder body 110 has a liquid inlet 111 and a liquid inlet 2 114, which are located on both sides of the sliding cylinder 150, respectively. A sliding port 112 is provided at one end of the cylinder body 110 along the axial direction, and the piston rod 120 is slidably sealed in the sliding port 112; The sliding port 112 and the locking assembly 200 are located on the same side of the sliding cylinder 150; The sealing ring 151 is fixed to the outer ring of the sliding cylinder 150, and the sealing ring 151 is tightly attached to the inner wall of the cylinder body 110. The sealing ring 152 is fixed to the inner ring of the sliding cylinder 150, and the sealing ring 152 is in close contact with the piston rod 120. The sealing ring 3160 is fixed to the inner ring of the sliding port 112, and the sealing ring 3160 is in close contact with the piston rod 120.

[0037] Specifically, sealing ring 151, sealing ring 2 152 and sealing ring 3 160 can improve the sealing effect of sliding cylinder 150 in cylinder body 110 and piston rod 120 in cylinder body 110.

[0038] Solenoid valve 140 is existing technology and will not be described in detail here.

[0039] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages: The mechanical locking mechanism completely prevents the piston rod 120 from slipping due to internal leakage in the hydraulic system, thus improving the reliability and safety of the equipment. In the stopped state, the locking block 223 and the stop block 170 are fully engaged, generating friction, which can effectively prevent the piston rod 120 from accidentally extending outward. The solenoid valve 140 and the second spring 180 enable the sliding cylinder 150 to automatically reset when the machine stops, without manual intervention. The locking block 223 can quickly enter the locking position, improving the convenience of operation.

[0040] Example 2: The above-mentioned device can only lock in one direction during use, preventing the piston rod 120 from extending outward after shutdown, but it cannot prevent the piston rod 120 from retracting inward, thus reducing the device's applicability. Therefore, improvements are made to the solution in Example 1, such as... Figure 8 As shown: It also includes locking assembly 2 300; The structure of locking assembly 200 is the same as that of locking assembly 200. Locking component 2 300 is located on the side of sliding cylinder 150 away from locking component 1 200, and locking component 2 300 and locking component 1 200 are arranged symmetrically.

[0041] Locking component 2 300 and locking component 1 200 correspond to the two stops 170 respectively.

[0042] Specifically, locking assembly 200 can prevent the piston rod 120 from extending outward after the device stops, thus locking the piston rod 120; locking assembly 300 has the same structure as locking assembly 200 and the same usage process, thus preventing the piston rod 120 from retracting inward after the device stops, thus locking the piston rod 120. When the position of piston rod 120 needs to be fixed, the entire device stops, solenoid valve 140 opens, connecting the cavities on both sides of sliding cylinder 150 in cylinder body 110. The sliding cylinder 150 is reset by the elastic force of springs 180 on both sides of the sliding cylinder 150, so that the sliding cylinder 150 does not abut against locking assembly 300 and locking assembly 200. Springs 222 in locking assembly 300 and locking assembly 200 push locking block 223 into the space between stop block 170 and cylinder body 110, so that friction can be generated between locking block 223, inner wall of cylinder body 110 and outer ring of stop block 170, thus restricting the position of piston rod 120.

[0043] In the event of a leak in the pipes connected to inlet 111 and inlet 114, locking assembly 200 can prevent piston rod 120 from retracting inward, and locking assembly 200 can prevent piston rod 120 from extending outward.

[0044] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages: The two-way locking expands the application range and can simultaneously prevent inward retraction, making the hydraulic cylinder suitable for a wider range of scenarios, such as equipment that requires bidirectional fixed position; the two-way locking provides double insurance to prevent the piston rod 120 from moving in any direction, avoiding equipment loss of control or safety accidents.

[0045] Example 3: During use, the above device uses the friction between the locking block 223, the inner wall of the cylinder 110, and the outer ring of the stop block 170 to restrict the position of the piston rod 120. However, the position fixation effect is poor solely by the locking of the stop block 170. Therefore, the solution of Example 2 is improved, such as... Figures 9-11 As shown: The locking assembly 200 also includes a fitting component 230, which includes a mounting plate 231, a mounting ring 232, and a telescopic rod 233. The fitting part 230 is disposed between the telescopic rod 221 and the locking block 223; The number of fitting parts 230 is the same as the number of limiting parts 220, and they correspond one-to-one; The mounting plate 231 is arc-shaped and is fixed to the end of the telescopic rod 221 away from the fixing ring 210. The end of the spring 222 away from the fixing ring 210 is fixed to the mounting plate 231. One end of the telescopic rod 233 is fixed to the side of the mounting plate 231 away from the telescopic rod 221, and the other end of the telescopic rod 233 away from the telescopic mounting plate 231 is fixed to the locking block 223. The mounting ring 232 is annular and made of rubber. Both ends of the mounting ring 232 are fixed to the mounting plate 231 and the clip 223, respectively. The mounting plate 231, the locking block 223, and the mounting ring 232 together form a deformation cavity that is not connected to the outside. The telescopic rod 233 is located inside the deformation cavity formed by the mounting plate 231, the locking block 223, and the mounting ring 232. The deformation cavity formed by the mounting plate 231, the locking block 223, and the mounting ring 232 is filled with hydraulic oil.

[0046] Specifically, when the stop block 170 presses down on the locking block 223, it also presses down on the mounting ring 232 located between the locking block 223 and the first telescopic rod 221. This compresses the deformation cavity formed by the mounting plate 231, the locking block 223, and the mounting ring 232, causing the hydraulic oil filled in the deformation cavity to compress the mounting ring 232 outward and make it adhere to the inner wall of the cylinder body 110 and the surface of the stop block 170, increasing the friction. When the locking block 223 is not under force, the deformation cavity formed by the mounting plate 231, the locking block 223, and the mounting ring 232 will return to its original shape with the help of the elasticity of the mounting ring 232 and the second telescopic rod 233.

[0047] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages: The fitting component 230, by hydraulically pressing the mounting ring 232, increases the contact area and friction between the locking block 223 and the inner wall of the cylinder 110 and the stop block 170, making the locking more secure. The rubber material of the mounting ring 232 allows it to adapt to the surface shape of the inner wall of the cylinder 110 and the stop block 170, ensuring a tight fit and improving the stability and adaptability of the locking. The enhanced friction effectively prevents the piston rod 120 from fretting or slipping under high-pressure loads; the fitting component 230 reduces hard friction, and the elastic deformation of the mounting ring 232 absorbs some of the impact, reducing wear.

[0048] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A mechanical locking hydraulic cylinder, characterized in that, Includes cylinder block assembly (100) and locking assembly one (200); The cylinder assembly (100) includes a cylinder (110), a piston rod (120), a connecting pipe (130), a sliding cylinder (150), a stop block (170), and a second spring (180). A sliding cylinder (150) is sleeved on the piston rod (120), and the piston rod (120) and the sliding cylinder (150) are slidably arranged inside the cylinder body (110). Locking assembly 1 (200) includes a retaining ring (210) and a limiting member (220), the limiting member (220) including a telescopic rod 1 (221), a spring 1 (222) and a locking block (223); The piston rod (120) is fixed with a stop block (170) and a fixed ring (210), and the two ends of the telescopic rod (221) are respectively set on the fixed ring (210) and the telescopic rod (221); There are two stops (170), and the sliding cylinder (150) is located between the two stops (170); Spring 1 (222) has its two ends set on the fixed ring (210) and the locking block (223), and spring 2 (180) has its two ends fixed on the stop block (170) and the sliding cylinder (150); The two ends of the connecting pipe (130) are fixed on the cylinder body (110), and the two ends of the connecting pipe (130) are located on both sides of the sliding cylinder (150).

2. The mechanical locking hydraulic cylinder as described in claim 1, characterized in that, The cylinder block assembly (100) also includes a solenoid valve (140), which is fixed to the connecting pipe (130); The solenoid valve (140) is used to control the connection and closure of the cavities on both sides of the sliding cylinder (150) inside the cylinder body (110); When the entire device is shut down, the solenoid valve (140) opens, the second spring (180) resets the sliding cylinder (150), the sliding cylinder (150) does not contact the locking block (223), and the first spring (222) pushes the locking block (223) into the space between the stop block (170) and the cylinder body (110).

3. A mechanical locking hydraulic cylinder as described in claim 2, characterized in that, The cylinder body (110) is a hollow cylinder, and the piston rod (120) is a cylinder. The axis of the piston rod (120) and the axis of the cylinder body (110) are on the same straight line. Both the sliding cylinder (150) and the fixed ring (210) are cylindrical shapes that run through their axes. The inner ring of the sliding cylinder (150) is in close contact with the piston rod (120), and the outer ring of the sliding cylinder (150) is in close contact with the inner wall of the cylinder body (110). The inner ring of the retaining ring (210) is fixed to the outer ring of the piston rod (120), and the axes of the sliding cylinder (150) and the retaining ring (210) are on the same straight line as the axis of the cylinder body (110); The stop block (170) is a frustum-shaped block that runs through its axis. The cross section of the stop block (170) is triangular. The stop block (170) is located between the fixed ring (210) and the sliding cylinder (150). The end of the stop block (170) with the largest outer diameter is close to the sliding cylinder (150). The cross-section of the card block (223) is triangular; The side of the locking block (223) near the stop block (170) is an arc shape that fits against it, and the side of the locking block (223) near the inner wall of the cylinder (110) is an arc shape that fits against it.

4. A mechanical locking hydraulic cylinder as described in claim 3, characterized in that, When the device is completely shut down, the side of the locking block (223) close to the stop block (170) is completely in contact.

5. A mechanical locking hydraulic cylinder as described in claim 1, characterized in that, Spring 1 (222) is sleeved on telescopic rod 1 (221); Telescopic rod 1 (221) is rotatably connected to one side of fixed ring (210), and locking block (223) is set at the end of telescopic rod 1 (221) away from fixed ring (210); A torsion spring is fitted on the rotating shaft that rotatably connects the telescopic rod (221) and the fixed ring (210), and the two ends of the torsion spring are fixed on the telescopic rod (221) and the fixed ring (210) respectively. When the sliding cylinder (150) contacts the locking block (223), the telescopic rod (221) retracts, and the torsion spring on the rotating shaft connecting the telescopic rod (221) and the fixed ring (210) drives the locking block (223) to rotate toward the axis of the cylinder (110).

6. A mechanical locking hydraulic cylinder as described in claim 1, characterized in that, There are multiple limiting members (220), and the multiple limiting members (220) are arranged in a ring; There are multiple springs (180), and the multiple springs (180) are arranged in a ring.

7. A mechanical locking hydraulic cylinder as described in claim 1, characterized in that, The cylinder block assembly (100) also includes a communication port (113), with two communication ports (113) symmetrically opened on the bottom of the cylinder block (110). The two connecting ports (113) are located on both sides of the sliding cylinder (150); The two ends of the connecting tube (130) are fixed inside the connecting port (113).

8. A mechanical locking hydraulic cylinder as described in claim 1, characterized in that, The cylinder assembly (100) also includes a liquid inlet one (111), a sliding port (112), a liquid inlet two (114), a sealing ring one (151), a sealing ring two (152) and a sealing ring three (160). The cylinder body (110) has a liquid inlet 1 (111) and a liquid inlet 2 (114) on its sides, respectively. A sliding port (112) is opened at one end of the cylinder body (110) along the axial direction, and the piston rod (120) is slidably sealed inside the sliding port (112); The sliding port (112) and the locking assembly (200) are located on the same side of the sliding cylinder (150); The sealing ring 1 (151) is fixed to the outer ring of the sliding cylinder (150), and the sealing ring 1 (151) is tightly attached to the inner wall of the cylinder body (110); The sealing ring 2 (152) is fixed to the inner ring of the sliding cylinder (150), and the sealing ring 2 (152) is in close contact with the piston rod (120). The sealing ring 3 (160) is fixed to the inner ring of the sliding port (112), and the sealing ring 3 (160) is in close contact with the piston rod (120).

9. A mechanical locking hydraulic cylinder as described in claim 1, characterized in that, It also includes locking component two (300); The structure of locking assembly two (300) is the same as that of locking assembly one (200); Locking component two (300) is located on the side of the sliding cylinder (150) away from locking component one (200), and locking component two (300) and locking component one (200) are symmetrically arranged; Locking component two (300) and locking component one (200) correspond to two stops (170) respectively.

10. A mechanical locking hydraulic cylinder as described in claim 1, characterized in that, Locking assembly one (200) also includes a fitting (230), which includes a mounting plate (231), a mounting ring (232), and a telescopic rod two (233). The fitting (230) is disposed between the telescopic rod (221) and the locking block (223); The number of fitting parts (230) is the same as the number of limiting parts (220), and they correspond one-to-one; The mounting plate (231) is arc-shaped and is fixed to the end of the telescopic rod (221) away from the fixing ring (210). The end of the spring (222) away from the fixing ring (210) is fixed to the mounting plate (231). One end of the telescopic rod (233) is fixed to the side of the mounting plate (231) away from the telescopic rod (221), and the other end of the telescopic rod (233) away from the telescopic mounting plate (231) is fixed to the clip (223); The mounting ring (232) is annular and made of rubber. The two ends of the mounting ring (232) are fixed to the mounting plate (231) and the clip (223) respectively. The mounting plate (231), the locking block (223), and the mounting ring (232) together form a deformation cavity that is not connected to the outside. The telescopic rod (233) is located inside the deformation cavity formed by the mounting plate (231), the locking block (223), and the mounting ring (232). The deformation cavity formed by the mounting plate (231), the locking block (223), and the mounting ring (232) is filled with hydraulic oil.

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