Self-locking force-amplifying hydraulic cylinder

Abstract

The utility model relates to force increasing hydraulic cylinder technical field, concretely is a kind of self-locking force increasing hydraulic cylinder, including booster cylinder, the upper end of the booster cylinder is fixedly connected with oil seal, the outer surface of the oil seal is nestedly connected with second locking frame, the upper surface of the second locking frame is embeddedly movably connected with slide bar, the upper end of the slide bar is fixedly connected with connecting ring, the output end of the booster cylinder and connecting ring are fixedly connected, in the utility model, spring keeps the movement trend of limit plate to slide bar direction by elastic force, ensure that the output end of booster cylinder can be locked instantly in any stroke position, when electric push rod extends, clamping plate pulls blocking ring to make insertion column drive limit plate reverse sliding along limit rail, and the unlocking of toothed clamping plate disengaging from clamping tooth is realized, the output end of booster cylinder can be freely telescopic, and the efficiency of device self-locking is improved by semi-automatic operation, and the security risk when operating is reduced.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology for boosting force, specifically a self-locking hydraulic cylinder for boosting force. Background Technology

[0002] A booster hydraulic cylinder, also known as a pressure-boosting cylinder, requires self-locking to limit the movement of the piston rod at the front end of the hydraulic cylinder when controlling its position. Existing technologies include devices that, such as those described in CN217327932U (publication number CN217327932U), describe a self-locking booster hydraulic cylinder comprising: a base, a cylinder body movably connected to the outer surface of the base, a piston rod movably inserted into the inner surface of the cylinder body, four sliders fixedly mounted on the top outer surface of the base, and an oil seal movably inserted into the inner surface of the cylinder body. This self-locking booster hydraulic cylinder, when it is necessary to restrict the piston rod from retracting into the cylinder body...

[0003] Although the above device achieves a self-locking effect by rotating the crank, which drives the first threaded rod to rotate and moves the pressure plate inward, thus squeezing the slider, it requires manual rotation of the crank during use. Locking and unlocking require repeated rotation of the crank, which reduces the self-locking speed of the device and poses certain safety hazards due to manual rotation. Utility Model Content

[0004] The purpose of this invention is to provide a self-locking, force-boosting hydraulic cylinder to solve the problems mentioned in the background art.

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

[0006] A self-locking, force-boosting hydraulic cylinder includes a booster cylinder, the upper end of which is fixedly connected to an oil seal;

[0007] The outer surface of the oil seal is nested with a second locking frame. A slide rod is movably connected to the upper surface of the second locking frame. A connecting ring is fixedly connected to the upper end of the slide rod. The output end of the booster cylinder is fixedly connected to the connecting ring. A limit frame is fixedly connected to the front surface of the second locking frame. A control mechanism is nested with the lower surface of the limit frame. The control mechanism includes a control seat, a locking bar, an electric push rod, a controller, and an energy storage power supply. The control seat is nested with the outer surface of the limit frame. The locking bar is movably connected to the side surface of the control seat. A locking block is embedded at the end of the locking bar. The electric push rod is fixedly connected to the inner surface of the control seat. A snap-fit ​​plate is fixedly connected to the output end of the electric push rod. The controller is fixedly connected to the side surface of the control seat. The energy storage power supply is fixedly connected to the inner surface of the control seat.

[0008] Furthermore, the card strip passes through the limiting frame, and the control seat is movably connected through the nested connection between the card strip and the limiting frame.

[0009] Furthermore, the inner surface of the limiting frame is fixedly connected to a limiting rail, the inside of the limiting rail is slidably connected to a limiting plate, the front surface of the limiting plate is fixedly connected to an insertion post, the rear surface of the limiting plate is fixedly connected to a toothed retaining plate, the outer surface of the insertion post is nested with a spring, and the end of the insertion post is fixedly connected to a retaining ring.

[0010] Furthermore, the outer surface of the slide rod is provided with locking teeth, the locking teeth match the toothed locking plate, one end of the spring contacts the limiting frame, the other end of the spring contacts the circular protrusion on the outer surface of the insertion post, and the locking plate and the retaining ring are locked together.

[0011] Furthermore, the energy storage power supply, electric push rod, and card block are electrically connected.

[0012] Furthermore, the upper surface of the second locking frame is provided with a sliding hole, and the sliding rod and the sliding hole are slidably connected.

[0013] Furthermore, the rear surface of the second locking frame is detachably connected to the first locking frame, and a threaded connection assembly is provided at the connection position between the first locking frame and the second locking frame.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. The limiting rail guides the sliding direction of the limiting plate. After the toothed plate engages with the locking teeth, it forms a one-way locking structure. The spring uses elastic force to keep the limiting plate moving in the direction of the sliding rod, ensuring that the output end of the booster cylinder can be locked instantly at any stroke position. When the electric push rod extends, the locking plate pulls the retaining ring, causing the insertion column to drive the limiting plate to slide in the opposite direction along the limiting rail. The toothed plate disengages from the locking teeth to unlock. At this time, the output end of the booster cylinder can extend and retract freely. The semi-automatic operation improves the self-locking efficiency of the device and reduces safety hazards during operation.

[0016] 2. The slide bar achieves multi-stage self-locking through the engagement of the snap-fit ​​teeth and the toothed snap plate. The preload of the spring can be adjusted according to actual needs by replacing the spring with a different stiffness coefficient. The snap-fit ​​structure between the retaining ring and the snap-fit ​​plate adopts a detachable design, which facilitates the quick separation of the limit frame and the control seat in case of control mechanism failure, so as to repair the control mechanism separately. 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 schematic diagram of the disassembled structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the disassembled control mechanism of this utility model;

[0020] Figure 4 This is a schematic diagram of the cross-sectional structure of the limiting frame of this utility model.

[0021] In the diagram: 1. Pressure boosting cylinder; 101. Oil seal; 2. First locking frame; 201. Threaded connection assembly; 202. Second locking frame; 203. Sliding hole; 3. Sliding rod; 301. Snap-fit ​​teeth; 302. Connecting ring; 4. Limiting frame; 401. Limiting rail; 402. Limiting plate; 403. Toothed snap plate; 404. Insertion post; 405. Spring; 406. Retaining ring; 5. Control mechanism; 501. Control base; 502. Snap-fit ​​bar; 503. Snap-fit ​​block; 504. Electric push rod; 505. Controller; 506. Snap-fit ​​plate; 507. Energy storage power supply. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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 Figure 1-4 In this embodiment of the utility model, a self-locking force-boosting hydraulic cylinder includes a booster cylinder 1, and an oil seal 101 is fixedly connected to the upper end of the booster cylinder 1.

[0024] A second locking frame 202 is nested on the outer surface of the oil seal 101. A slide rod 3 is movably connected to the upper surface of the second locking frame 202. A connecting ring 302 is fixedly connected to the upper end of the slide rod 3. The output end of the booster cylinder 1 is fixedly connected to the connecting ring 302. A limit frame 4 is fixedly connected to the front surface of the second locking frame 202. A control mechanism 5 is nested on the lower surface of the limit frame 4. The control mechanism 5 includes a control base 501, a locking strip 502, an electric push rod 504, a controller 505, and... The energy storage power supply 507 and the control base 501 are nested and connected to the outer surface of the limiting frame 4. The locking strip 502 is embedded and movably connected to the side surface of the control base 501. The end of the locking strip 502 is embedded and connected to the locking block 503. The electric push rod 504 is fixedly connected to the inner surface of the control base 501. The output end of the electric push rod 504 is fixedly connected to the locking plate 506. The controller 505 is fixedly connected to the side surface of the control base 501. The energy storage power supply 507 is fixedly connected to the inner surface of the control base 501.

[0025] Specifically, the oil seal 101 seals the upper end of the booster cylinder 1. After the output end of the booster cylinder 1 extends, the limit frame 4, together with the slide rod 3, limits the output end to achieve self-locking. The connecting ring 302 and the output end bracket of the booster cylinder 1 are connected together by a threaded assembly. The control mechanism 5 is used to retract the electric push rod 504 and apply a second locking force to ensure the self-locking effect of the device. The locking strip 502, together with the locking block 503, allows for quick installation of the control mechanism 5, which is beneficial for quick disassembly of the control mechanism 5 in the future and facilitates its maintenance. The energy storage power supply 507, together with the controller 505, controls the electric push rod 504.

[0026] Example 1

[0027] like Figure 1-4 As shown, the locking strip 502 passes through the limiting frame 4, and the control seat 501 is movably connected to the limiting frame 4 via the locking strip 502. The inner surface of the limiting frame 4 is fixedly connected to the limiting rail 401, and the inside of the limiting rail 401 is slidably connected to the limiting plate 402. The front surface of the limiting plate 402 is fixedly connected to the insertion post 404, and the rear surface of the limiting plate 402 is fixedly connected to the toothed locking plate 403. The outer surface of the insertion post 404 is nested with a spring 405, and the end of the insertion post 404 is fixedly connected to a retaining ring 406.

[0028] In this embodiment, the limiting rail 401 guides the sliding direction of the limiting plate 402. The toothed plate 403 engages with the locking teeth 301 to form a one-way locking structure. The spring 405 uses elastic force to keep the limiting plate 402 moving towards the slide rod 3, ensuring that the output end of the booster cylinder 1 can be locked instantly at any stroke position. When the electric push rod 504 extends, the locking plate 506 pulls the retaining ring 406, causing the insertion post 404 to drive the limiting plate 402 to slide in the opposite direction along the limiting rail 401. The toothed plate 403 disengages from the locking teeth 301 to unlock. At this time, the output end of the booster cylinder 1 can extend and retract freely. The semi-automatic operation improves the self-locking efficiency of the device and reduces safety hazards during operation.

[0029] like Figure 1-4 As shown, the outer surface of the slide bar 3 is provided with locking teeth 301, which are matched with the toothed locking plate 403. One end of the spring 405 is in contact with the limiting frame 4, and the other end of the spring 405 is in contact with the circular protrusion on the outer surface of the insertion post 404. The locking plate 506 and the retaining ring 406 are locked together.

[0030] In this embodiment, the slide bar 3 achieves multi-level self-locking through the engagement of the locking teeth 301 and the toothed locking plate 403. The preload of the spring 405 can be adjusted according to actual needs by replacing the spring 405 with a different stiffness coefficient. The locking structure between the retaining ring 406 and the locking plate 506 adopts a detachable design, which facilitates the quick separation of the limit frame 4 and the control seat 501 when the control mechanism 5 fails, so as to repair the control mechanism 5 separately.

[0031] Example 2

[0032] Based on Embodiment 1, in order to overcome the problem that it is inconvenient to quickly install the first locking frame 2 and the threaded connection assembly 201 in Embodiment 1.

[0033] like Figure 1-4 As shown, the energy storage power supply 507, the electric push rod 504 and the locking block 503 are electrically connected. The upper surface of the second locking frame 202 is provided with a sliding hole 203. The sliding rod 3 and the sliding hole 203 are slidably connected. The rear surface of the second locking frame 202 is detachably connected to the first locking frame 2. The connection position of the first locking frame 2 and the second locking frame 202 is provided with a threaded connection assembly 201.

[0034] In this embodiment, the first locking frame 2 forms a modular assembly structure with the second locking frame 202 through the threaded connection assembly 201. The sliding hole 203 guides the slide rod 3 through the sliding engagement. When disassembly is required, the first locking frame 2 and the second locking frame 202 can be separated by rotating the threaded connection assembly 201 in the opposite direction. This self-locking and force-enhancing hydraulic cylinder has the characteristics of high load-bearing capacity, anti-retraction, and maintenance-free through a multi-stage mechanical-hydraulic hybrid self-locking and electric fast unlocking design. It is suitable for scenarios with stringent requirements for safe locking, long-term pressure holding, and rapid response.

[0035] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0036] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A self-locking, force-boosting hydraulic cylinder, comprising a booster cylinder (1), wherein an oil seal (101) is fixedly connected to the upper end of the booster cylinder (1); Its features are, The outer surface of the oil seal (101) is nested with a second locking frame (202). A slide rod (3) is movably connected to the upper surface of the second locking frame (202). A connecting ring (302) is fixedly connected to the upper end of the slide rod (3). The output end of the booster cylinder (1) is fixedly connected to the connecting ring (302). A limit frame (4) is fixedly connected to the front surface of the second locking frame (202). A control mechanism (5) is nested within the lower surface of the limit frame (4). The control mechanism (5) includes: The control seat (501) is nested and connected to the outer surface of the limiting frame (4); A card strip (502) is embedded and movably connected to the side surface of the control base (501), and a card block (503) is embedded and connected to the end of the card strip (502); An electric push rod (504) is fixedly connected to the inner surface of the control base (501), and a snap-fit ​​plate (506) is fixedly connected to the output end of the electric push rod (504); The controller (505) is fixedly connected to the side surface of the control base (501); The energy storage power supply (507) is fixedly connected to the inner surface of the control base (501).

2. The self-locking, force-increasing hydraulic cylinder according to claim 1, characterized in that, The card strip (502) passes through the limiting frame (4), and the control seat (501) is movably connected by the card strip (502) and the limiting frame (4).

3. The self-locking, force-increasing hydraulic cylinder according to claim 1 or 2, characterized in that, The inner surface of the limiting frame (4) is fixedly connected to a limiting rail (401), the inside of the limiting rail (401) is slidably connected to a limiting plate (402), the front surface of the limiting plate (402) is fixedly connected to an insertion post (404), the rear surface of the limiting plate (402) is fixedly connected to a toothed retaining plate (403), the outer surface of the insertion post (404) is nested with a spring (405), and the end of the insertion post (404) is fixedly connected to a retaining ring (406).

4. The self-locking, force-increasing hydraulic cylinder according to claim 3, characterized in that, The outer surface of the slide bar (3) is provided with snap-fit ​​teeth (301), which match the toothed snap-fit ​​plate (403). One end of the spring (405) contacts the limiting frame (4), and the other end of the spring (405) contacts the circular protrusion on the outer surface of the insertion post (404). The snap-fit ​​plate (506) and the retaining ring (406) are snapped together.

5. The self-locking, force-increasing hydraulic cylinder according to claim 1, characterized in that, The energy storage power supply (507), electric push rod (504), and card block (503) are electrically connected.

6. The self-locking, force-increasing hydraulic cylinder according to claim 1, characterized in that, The upper surface of the second locking frame (202) is provided with a sliding hole (203), and the sliding rod (3) and the sliding hole (203) are slidably connected.

7. The self-locking, force-increasing hydraulic cylinder according to claim 1, characterized in that, The rear surface of the second locking frame (202) is detachably connected to the first locking frame (2), and a threaded connection assembly (201) is provided at the connection position between the first locking frame (2) and the second locking frame (202).

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