Hydraulic cylinder with mechanical self-locking structure

Abstract

The utility model relates to the technical field of hydraulic cylinders, in particular to a hydraulic cylinder with a mechanical self-locking structure, which comprises a support base, and a hydraulic cylinder body is fixedly mounted in the middle of one side of the top end of the support base. Through the arrangement of the self-locking mechanism, the piston rod is automatically locked and adjusted, the servo motor drives the bidirectional threaded rod to rotate and drives the two adjusting and moving threaded blocks to move towards or away from each other along the bidirectional threaded rod, and then the reinforcing supporting rod drives the anti-skid rubber arc-shaped block to be close to or away from the piston rod. Locking and unlocking can be completed without manual operation, the problem that in the prior art, using convenience is affected by manual locking is effectively solved, convenience of automatic locking and limiting operation on the piston rod is remarkably improved, and when locking is needed, the two anti-skid rubber arc-shaped blocks move in the opposite directions and are tightly attached to the piston rod, and the piston rod is firmly fixed; when unlocking is needed, the two cylinders move oppositely to be separated from the piston rod, operation is efficient, and the automation degree is high.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, specifically a hydraulic cylinder with a mechanical self-locking structure. Background Technology

[0002] Hydraulic cylinders, as key actuators in hydraulic systems, are widely used in many fields such as industrial production and engineering machinery. In actual operation, hydraulic cylinders often need to maintain stability in a specific position to prevent the piston rod from moving unexpectedly due to external forces or hydraulic system leaks, which could affect the normal operation of equipment or even cause safety accidents. Traditional hydraulic cylinders usually rely solely on the hydraulic system pressure to maintain the piston rod position. Once the hydraulic system malfunctions, such as hydraulic oil leakage, it is difficult to guarantee the stability of the piston rod, posing a significant safety hazard. Therefore, a hydraulic cylinder with a mechanical self-locking structure is needed for locking and limiting operations.

[0003] However, due to the poor automatic locking adjustment capability of hydraulic cylinders with mechanical self-locking structures in existing technologies, it is not convenient to automatically lock and limit the piston rod according to the needs of use during actual use. Some simple locking methods in existing technologies, such as positioning blocks or spring locking mechanisms, have also revealed many problems in practical applications. For example, positioning blocks are not impact-resistant and are easily deformed, and spring locking has poor effect, delayed buffering time, and is prone to failure after long-term operation. In addition, some require manual locking, which affects the convenience of use. Utility Model Content

[0004] The purpose of this utility model is to provide a hydraulic cylinder with a mechanical self-locking structure to solve the problem mentioned in the background art that the prior art is not convenient for automatically locking and limiting the piston rod according to the needs of use.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A hydraulic cylinder with a mechanical self-locking structure includes a support base, a hydraulic cylinder body is fixedly installed in the middle of one side of the top of the support base, a piston rod is installed inside the hydraulic cylinder body, and a self-locking mechanism is provided at the top of the support base.

[0007] The self-locking mechanism includes a first positioning through groove. The top of the support base is provided with a first positioning through groove on the side away from the hydraulic cylinder body. The top of the support base is provided with a second positioning through groove on the side close to the hydraulic cylinder body. A servo motor is fixedly installed on one side of the support base.

[0008] Preferably, the servo motor output shaft is fixedly connected to a bidirectional threaded rod via a coupling. The bidirectional threaded rod extends into the interior of the support base. A support bearing seat is fixedly installed on the inner wall of the support base on the side away from the servo motor. The side of the bidirectional threaded rod away from the servo motor is fixedly connected to the interior of the support bearing seat.

[0009] Preferably, the outer end of the bidirectional threaded rod is threadedly connected to two adjusting moving screw blocks, and a guide support rod is fixedly installed inside the support base on the side away from the bidirectional threaded rod. Two support sliders are sleeved on the outer end of the guide support rod.

[0010] Preferably, a reinforcing support rod is fixedly installed at the top of the adjusting movable screw block and the supporting slider, and the reinforcing support rod extends through the first positioning through groove and the second positioning through groove to the top of the supporting base.

[0011] Preferably, a fixing plate is fixedly installed on both sides of the reinforcing support rod that are close to each other, and an anti-slip rubber arc-shaped block is fixedly installed on both sides of the fixing plate that are close to each other. A limit connecting rod is fixedly installed in the middle of the adjusting moving screw block and the support slider.

[0012] Preferably, a shock-absorbing rubber pad is fixedly installed at the bottom of the support base, and a plurality of mounting and positioning screw holes are evenly opened at the top of the support base, the mounting and positioning screw holes penetrating the support base and the shock-absorbing rubber pad.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This hydraulic cylinder with a mechanical self-locking structure achieves automatic locking and adjustment of the piston rod through the self-locking mechanism. A servo motor drives the bidirectional threaded rod to rotate, causing two adjusting moving screw blocks to move towards or away from each other along the bidirectional threaded rod. This, in turn, moves the anti-slip rubber arc-shaped blocks closer to or away from the piston rod through the reinforcing support rod. Locking and unlocking can be completed without manual operation, effectively solving the problem of manual locking affecting the convenience of use in the prior art. It significantly improves the convenience of automatically locking and limiting the piston rod according to the needs of use. When locking is required, the two anti-slip rubber arc-shaped blocks move towards each other and fit tightly against the piston rod, relying on friction and clamping force to firmly fix the piston rod. When unlocking is required, the two blocks move away from each other and disengage from the piston rod. The operation is highly efficient and has a high degree of automation.

[0015] 2. This hydraulic cylinder with a mechanical self-locking structure enhances the stability during locking by setting a reinforcing support rod at the top of the adjusting moving screw and the supporting slider, and installing a fixing plate and an anti-slip rubber arc block on the side close to the reinforcing support rod. The anti-slip rubber arc block has good elasticity and friction, which increases the friction coefficient when in contact with the piston rod surface, preventing slippage during locking and ensuring that the piston rod is not easily displaced when subjected to external force. At the same time, the fixing plate supports and fixes the anti-slip rubber arc block, preventing it from deforming or falling off during clamping. Combined with the thread transmission characteristics of the bidirectional threaded rod, the locking force can be adjusted according to actual needs through the output torque of the servo motor. This overcomes the defects of the positioning block being not impact-resistant and easily deformed, as well as the poor locking effect of the spring, and improves the reliability and durability of the locking mechanism.

[0016] 3. This hydraulic cylinder with a mechanical self-locking structure provides stable guidance for the movement of the adjusting screw by setting a guide support rod and a support slider inside the support base. The guide support rod is set parallel to the bidirectional threaded rod, and the support slider is sleeved on the outer end of the guide support rod and moves synchronously with the adjusting screw. This effectively prevents the adjusting screw from shifting or shaking when the bidirectional threaded rod rotates, ensuring the coaxiality and symmetry of the movement of the two anti-slip rubber arc blocks, ensuring a uniform distribution of the clamping force on the piston rod, and avoiding damage to the piston rod or locking failure due to uneven force. In addition, the shock-absorbing rubber pad at the bottom of the support base can reduce the impact of vibration generated by the hydraulic cylinder during operation on the self-locking mechanism. The setting of the mounting positioning screw hole makes it easy to install the entire device stably in different working scenarios, enhancing the adaptability and practicality of the device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a partial structural diagram of the self-locking mechanism of this utility model. Figure 1 ;

[0019] Figure 3 This is a partial structural diagram of the self-locking mechanism of this utility model. Figure 2 ;

[0020] Figure 4 This is an enlarged structural schematic diagram of a partial detail of the self-locking mechanism of this utility model.

[0021] In the diagram: 1. Support base; 2. Hydraulic cylinder body; 3. Piston rod; 4. Self-locking mechanism; 401. First positioning slot; 402. Second positioning slot; 403. Servo motor; 404. Bidirectional threaded rod; 405. Support bearing seat; 406. Adjustable moving screw block; 407. Guide support rod; 408. Support slider; 409. Reinforcing support rod; 410. Fixing plate; 411. Anti-slip rubber arc block; 412. Limiting connecting rod; 5. Shock-absorbing rubber pad; 6. Mounting positioning screw hole. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-4 As shown, this utility model provides a technical solution:

[0024] A hydraulic cylinder with a mechanical self-locking structure includes a support base 1, a hydraulic cylinder body 2 fixedly installed in the middle of one side of the top of the support base 1, a piston rod 3 installed inside the hydraulic cylinder body 2, and a self-locking mechanism 4 provided at the top of the support base 1.

[0025] The self-locking mechanism 4 includes a first positioning through groove 401. The first positioning through groove 401 is provided on the side of the top of the support base 1 away from the hydraulic cylinder body 2. A second positioning through groove 402 is provided on the side of the top of the support base 1 close to the hydraulic cylinder body 2. A servo motor 403 is fixedly installed on one side of the support base 1. The output shaft of the servo motor 403 is fixedly connected to a bidirectional threaded rod 404 via a coupling. The bidirectional threaded rod 404 extends into the interior of the support base 1. A support shaft is fixedly installed on the inner wall of the support base 1 on the side away from the servo motor 403. The bearing seat 405 and the bidirectional threaded rod 404 are fixedly connected inside the support bearing seat 405 on the side away from the servo motor 403. Two adjusting moving screw blocks 406 are threadedly connected to the outer end of the bidirectional threaded rod 404. A guide support rod 407 is fixedly installed inside the support base 1 on the side away from the bidirectional threaded rod 404. Two support sliders 408 are sleeved on the outer end of the guide support rod 407. A reinforcing support rod 409 is fixedly installed on the top of the adjusting moving screw block 406 and the top of the support slider 408. The reinforcing support rod 409 passes through the first positioning... The through groove 401 and the second positioning through groove 402 extend to the top of the support base 1. Fixing plates 410 are fixedly installed on both sides of the reinforcing support rod 409, and anti-slip rubber arc blocks 411 are fixedly installed on both sides of the fixing plates 410. A limit connecting rod 412 is fixedly installed in the middle of the adjusting moving screw block 406 and the support slider 408. The servo motor 403 starts, and the output shaft of the servo motor 403 drives the bidirectional threaded rod 404 to rotate clockwise under the support of the support bearing seat 405 via a coupling. Under the action of the threaded transmission, the two... The adjusting moving screw block 406 moves towards each other along the bidirectional threaded rod 404. At the same time, the adjusting moving screw block 406 drives the support slider 408 to slide towards each other along the guide support rod 407 through the limiting connecting rod 412. The cooperation between the guide support rod 407 and the support slider 408 ensures the smoothness of the movement of the adjusting moving screw block 406 and prevents it from deflecting. The adjusting moving screw block 406 and the support slider 408 together drive the top reinforcing support rod 409 to move, thereby causing the anti-slip rubber arc block 411 on the fixed plate 410 to move at the same time.

[0026] A shock-absorbing rubber pad 5 is fixedly installed at the bottom of the support base 1. Several mounting and positioning screw holes 6 are evenly opened at the top of the support base 1. The mounting and positioning screw holes 6 pass through the support base 1 and the shock-absorbing rubber pad 5. The device is stably installed in the required position by screwing in bolts through the mounting and positioning screw holes 6.

[0027] In this embodiment, a hydraulic cylinder with a mechanical self-locking structure is first installed stably in the desired position by screwing bolts into the mounting positioning screw holes 6. An external power supply is then connected to power the components of the device, and it is electrically connected to an external control system. This allows the control system to precisely control the start, stop, and forward / reverse rotation of the servo motor 403. Initially, the two adjusting moving screws 406 are in a disjointed position on the bidirectional threaded rod 404, causing the reinforcing support rod 409 and the anti-slip rubber arc block 411 to be in an open state. At this time, the piston rod 3 can freely extend and retract within the hydraulic cylinder body 2, without being constrained by the self-locking mechanism 4. When it is necessary to lock the piston rod 3, the external control system sends a forward rotation command to the servo motor 403. The output shaft of the servo motor 403 drives the bidirectional threaded rod 404 to rotate clockwise under the support of the bearing seat 405 via a coupling. Since the threads at both ends of the bidirectional threaded rod 404 have opposite directions and are threadedly connected to two adjusting movable screw blocks 406, the two adjusting movable screw blocks 406 move towards each other along the bidirectional threaded rod 404 under the action of threaded transmission. Simultaneously, the adjusting movable screw blocks 406 drive the support slider 408 to slide synchronously towards each other along the guide support rod 407 via the limit connecting rod 412. The cooperation between the guide support rod 407 and the support slider 408 ensures the smoothness of the movement of the adjusting movable screw blocks 406 and prevents them from deflecting. The adjusting movable screw blocks 406 and the support slider 408 together drive the top reinforcing support rod 409 along the first positioning channel. The groove 401 and the second positioning through groove 402 move towards each other, causing the anti-slip rubber arc block 411 on the fixing plate 410 to gradually approach the piston rod 3. As the servo motor 403 continues to operate, the two anti-slip rubber arc blocks 411 eventually fit tightly against the outer surface of the piston rod 3. Relying on the clamping force generated by the elastic deformation of the anti-slip rubber arc blocks 411 themselves and the friction between them and the surface of the piston rod 3, the piston rod 3 is firmly locked in the current position, achieving mechanical self-locking. At this time, the servo motor 403 can be stopped by the control system, the bidirectional threaded rod 404 can be stopped rotating, and the position of the adjusting moving screw block 406 can be fixed, thus maintaining the locked state. When it is necessary to unlock, a reverse command is sent to the servo motor 403 through the external control system. The machine 403 drives the bidirectional threaded rod 404 to rotate counterclockwise. Under the action of the threaded transmission, the two adjusting moving screw blocks 406 move in opposite directions along the bidirectional threaded rod 404. The support slider 408 slides synchronously in opposite directions along the guide support rod 407. The reinforcing support rod 409 drives the anti-slip rubber arc block 411 to gradually move away from the piston rod 3 until it returns to the initial open position. The piston rod 3 returns to its free extension and retraction state, completing the unlocking operation. During the entire working process, the shock-absorbing rubber pad 5 at the bottom of the support base 1 can absorb the vibration generated when the hydraulic cylinder is working, reducing the impact of vibration on the connection stability of each component of the self-locking mechanism 4, and preventing the anti-slip rubber arc block 411 from becoming loose between the piston rod 3 due to vibration. The mounting positioning screw hole 6 securely fixes the support base 1 with bolts.This ensures that the entire device remains stationary during locking and unlocking, providing a stable foundation for the reliable operation of the self-locking mechanism 4.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A hydraulic cylinder with a mechanical self-locking structure, comprising a support base (1), characterized in that: A hydraulic cylinder body (2) is fixedly installed in the middle of one side of the top of the support base (1). A piston rod (3) is installed inside the hydraulic cylinder body (2). A self-locking mechanism (4) is provided at the top of the support base (1). The self-locking mechanism (4) includes a first positioning through groove (401). The first positioning through groove (401) is provided on the side of the top of the support base (1) away from the hydraulic cylinder body (2). The second positioning through groove (402) is provided on the side of the top of the support base (1) close to the hydraulic cylinder body (2). A servo motor (403) is fixedly installed on one side of the support base (1).

2. A hydraulic cylinder with a mechanical self-locking structure according to claim 1, characterized in that: The output shaft of the servo motor (403) is fixedly connected to the bidirectional threaded rod (404) via a coupling. The bidirectional threaded rod (404) extends into the interior of the support base (1). A support bearing seat (405) is fixedly installed on the inner wall of the support base (1) on the side away from the servo motor (403). The side of the bidirectional threaded rod (404) away from the servo motor (403) is fixedly connected to the interior of the support bearing seat (405).

3. A hydraulic cylinder with a mechanical self-locking structure according to claim 2, characterized in that: The outer end of the bidirectional threaded rod (404) is threadedly connected to two adjusting moving screw blocks (406). A guide support rod (407) is fixedly installed on the side of the support base (1) away from the bidirectional threaded rod (404). Two support sliders (408) are sleeved on the outer end of the guide support rod (407).

4. A hydraulic cylinder with a mechanical self-locking structure according to claim 3, characterized in that: The top of the adjusting moving screw block (406) and the support slider (408) are fixedly installed with a reinforcing support rod (409), which extends through the first positioning slot (401) and the second positioning slot (402) to the top of the support base (1).

5. A hydraulic cylinder with a mechanical self-locking structure according to claim 4, characterized in that: Fixing plates (410) are fixedly installed on the two sides of the reinforcing support rod (409) that are close to each other. Anti-slip rubber arc blocks (411) are fixedly installed on the two sides of the fixing plates (410) that are close to each other. Limiting connecting rods (412) are fixedly installed in the middle of the adjusting moving screw block (406) and the support slider (408).

6. A hydraulic cylinder with a mechanical self-locking structure according to claim 5, characterized in that: The bottom end of the support base (1) is fixedly installed with a shock-absorbing rubber pad (5), and the top end of the support base (1) is evenly provided with a plurality of mounting and positioning screw holes (6), which penetrate the support base (1) and the shock-absorbing rubber pad (5).

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