Hydraulic oil cylinder with locking function

Abstract

The utility model relates to the technical field of hydraulic equipment, and discloses a hydraulic oil cylinder with a locking function, which comprises a cylinder body, one side of the cylinder body is in threaded connection with a cylinder cover, an inner cavity of the cylinder body is in sliding connection with a push rod, and two sides of the cylinder body are fixedly connected with locking mechanisms. According to the utility model, through the matching of the chute on the fixed rod and the sliding block, when oil is injected into the hydraulic oil cylinder to push the piston and the fixed rod to move upwards, the movement in the vertical direction can be converted into the movement in the horizontal direction of the sliding block, so that the bulge on the arc-shaped plate is driven to be accurately embedded into the groove of the push rod, and the firm locking of the push rod is realized; the mechanical transmission mode can effectively avoid looseness or displacement of the push rod caused by factors such as pressure fluctuation and load change in the working process, ensures the accuracy of the working position of the hydraulic oil cylinder, improves the stability and reliability of equipment operation, and is suitable for working scenes with high precision requirements, such as precision machining equipment and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic equipment technical field especially is related to a hydraulic cylinder with locking function. BACKGROUND

[0002] In modern industrial production, small hydraulic cylinders are widely used in automatic production lines, medical devices, small engineering machinery and other fields due to their compact structure and rapid response, and are key components for realizing precise linear motion control. However, the existing small hydraulic cylinders have many limitations in the locking function, which cannot meet the use requirements under complex working conditions.

[0003] On the one hand, the locking structure of traditional small hydraulic cylinders relies on elements such as hydraulic drive one-way valve and cartridge valve, which has a complex structure and high cost. For example, the use of multi-stage hydraulic valve group to achieve locking not only increases the complexity of oil circuit layout, but also easily causes hydraulic oil leakage due to valve group sealing failure, thereby causing accidental movement of the piston rod, seriously affecting the equipment operation precision and stability. On the other hand, the existing locking device lacks effective emergency handling capability when facing sudden failures or special working conditions. When the hydraulic system fails, such as power source failure or pipeline rupture, the locking mechanism relying only on hydraulic drive often cannot work normally, which may cause safety accidents.

[0004] Therefore, the skilled person in the art provides a hydraulic cylinder with locking function to solve the problems raised in the background art. SUMMARY

[0005] In order to improve the problem of complex structure of the locking mechanism of the traditional hydraulic cylinder and lack of effective emergency handling structure, the utility model provides a hydraulic cylinder with locking function, which adopts the following technical scheme:

[0006] A hydraulic cylinder with locking function, comprising a cylinder body, a cylinder cover is threadedly connected to one side of the cylinder body, a push rod is slidably connected in the inner cavity of the cylinder body, locking mechanisms are fixedly connected to both sides of the cylinder body, the locking mechanism comprises a hydraulic cylinder, one side of the hydraulic cylinder is fixedly connected with the cylinder body, a piston is slidably connected in the inner cavity of the hydraulic cylinder, a fixed rod is fixedly connected to one side of the piston, a slanted groove is formed in one side of the fixed rod, a sliding block is slidably connected in the inner cavity of the slanted groove, a slot is formed in the surface of the cylinder body, the sliding block penetrates the inner cavity of the slot and is fixedly connected with an arc-shaped plate on one side, guide columns are fixedly connected to both sides of the sliding block, first springs are arranged on the surface of the guide columns, one side of the first spring is fixedly connected with the cylinder body, a protrusion is fixedly connected in the inner cavity of the arc-shaped plate, a recess is formed in the surface of the push rod, and the protrusion is slidably connected with the recess on one side.

[0007] Optionally, an oil inlet pipe is arranged on one side of the piston, and the oil inlet pipe is fixedly connected with the hydraulic cylinder on one side.

[0008] Optionally, one side of the hydraulic cylinder cavity is slidably connected with a push block, one side of the push block is fixedly connected with a pressing rod, the surface of the pressing rod is provided with a second spring, and one side of the second spring is fixedly connected with the hydraulic cylinder.

[0009] Optionally, one side of the push block is provided with a limiting block, and one side of the limiting block is fixedly connected with the hydraulic cylinder.

[0010] Optionally, the hydraulic cylinder cavity is provided with a limiting groove, and one side of the push block is slidably connected with the limiting groove.

[0011] Optionally, the bottom of the piston is provided with an abutting block, and one side of the abutting block is fixedly connected with the hydraulic cylinder.

[0012] Optionally, the surface of the sliding block is provided with a sealing gasket, and one side of the sealing gasket is fixedly connected with the cylinder body.

[0013] Optionally, the surface of the push rod is provided with a rubber ring, and one side of the rubber ring is fixedly connected with the cylinder cover.

[0014] In summary, the utility model has the following beneficial effects:

[0015] 1. The utility model discloses a fixed rod upper chute and sliding block cooperation, when oil injection hydraulic oil cylinder pushes the piston and fixed rod and moves up, can convert the movement in the vertical direction into the movement in the horizontal direction of sliding block, and then drive the convex of arc plate accurately inserts the recess of push rod, realizes the firm locking of push rod, and this mechanical transmission mode can effectively avoid the looseness or displacement of push rod in the working process because of pressure fluctuation, load change and other factors, guarantees the accuracy of hydraulic oil cylinder working position, improves the stability and reliability of equipment operation, and is suitable for the working scene of higher accuracy requirement, such as precision machining equipment.

[0016] 2. The utility model discloses the setting of pressing rod and push block, when the hydraulic system appears the fault, such as hydraulic oil leakage, power source failure and the like, leads to the locking of conventional hydraulic drive and cannot be realized, and operating personnel can drive the piston to move up by manually pushing the pressing rod, and then drive arc plate and convex to act, realize the emergency locking of push rod, this effectively avoids the accidental movement of push rod because of system failure, prevents equipment damage or safety accident, provides reliable emergency guarantee for equipment under the sudden condition, and is suitable for the occasion of extremely high safety requirement. ACCURACY

[0017] Figure 1 It is the structure schematic diagram of the utility model.

[0018] Figure 2 It is the structure schematic diagram of the locking mechanism of the utility model.

[0019] Figure 3 is the structure diagram of the pushing block of the utility model.

[0020] Figure 4 is the enlarged view of A of the utility model.

[0021] Figure 5 is the structure diagram of the cylinder cover of the utility model.

[0022] Mark explanation:

[0023] 1, cylinder body;2, cylinder cover;3, push rod;4, locking mechanism;401, hydraulic cylinder;402, piston;403, fixed rod;404, inclined groove;405, sliding block;406, notch;407, arc plate;408, guide column;409, first spring;410, protruding block;411, recess;5, oil inlet pipe;6, pushing block;7, pressing rod;8, second spring;9, limiting block;10, limiting groove;11, abutting block;12, sealing gasket;13, rubber ring. Specific implementation

[0024] The following will be combined with the Figures 1-5 Further detailed description of the present application.

[0025] Example one:

[0026] Please refer to Figures 1-5 A hydraulic cylinder with locking function, including cylinder body 1, cylinder cover 2 is connected on one side of cylinder body 1 by screw thread, push rod 3 is connected in the cavity of cylinder body 1 by sliding, locking mechanism 4 is connected on both sides of cylinder body 1 by fixed, locking mechanism 4 includes hydraulic cylinder 401, hydraulic cylinder 401 is connected with cylinder body 1 by fixed on one side, piston 402 is connected in the cavity of hydraulic cylinder 401 by sliding, fixed rod 403 is connected with piston 402 by fixed on one side, inclined groove 404 is set up on one side of fixed rod 403, sliding block 405 is connected in the cavity of inclined groove 404 by sliding, notch 406 is set up on the surface of cylinder body 1, arc plate 407 is connected in the cavity of sliding block 405 by fixed on one side and penetrates the cavity of notch 406 and is connected by fixed, guide column 408 is connected with sliding block 405 by fixed on both sides, first spring 409 is arranged on the surface of guide column 408, first spring 409 is connected with cylinder body 1 by fixed on one side, protruding block 410 is connected in the cavity of arc plate 407 by fixed, recess 411 is set up on the surface of push rod 3, protruding block 410 is connected with recess 411 by sliding on one side.

[0027] In this embodiment: the guide column 408 on the other side penetrates through the surface of the cylinder body 1 and extends to one side of the arc-shaped plate 407, the number of the locking mechanism 4 is two, the hydraulic oil can be injected into the two hydraulic cylinders 401 at the same time to drive the arc-shaped plate 407 on both sides to lock the push rod 3 at the same time, avoiding uneven force on the push rod 3 caused by one side locking, the number of the guide column 408 and the first spring 409 is four, when the fixed rod 403 moves to the bottom of the inner cavity of the hydraulic cylinder 401, the first spring 409 can drive the arc-shaped plate 407 to automatically reset and release the locking state, the number of the protrusion 410 and the groove 411 is multiple, so that the arc-shaped plate 407 can lock the push rod 3 at multiple positions.

[0028] Embodiment two:

[0029] Referring to Figures 1-5 , one side of the piston 402 is provided with an oil inlet pipe 5, one side of the oil inlet pipe 5 is fixedly connected with the hydraulic cylinder 401, one side of the inner cavity of the hydraulic cylinder 401 is slidably connected with a push block 6, one side of the push block 6 is fixedly connected with a pressing rod 7, the surface of the pressing rod 7 is provided with a second spring 8, one side of the second spring 8 is fixedly connected with the hydraulic cylinder 401, one side of the push block 6 is provided with a limiting block 9, one side of the limiting block 9 is fixedly connected with the hydraulic cylinder 401, the inner cavity of the hydraulic cylinder 401 is provided with a limiting groove 10, one side of the push block 6 is slidably connected with the limiting groove 10, the bottom of the piston 402 is provided with an abutting block 11, one side of the abutting block 11 is fixedly connected with the hydraulic cylinder 401, the surface of the sliding block 405 is provided with a sealing gasket 12, one side of the sealing gasket 12 is fixedly connected with the cylinder body 1, the surface of the push rod 3 is provided with a rubber ring 13, one side of the rubber ring 13 is fixedly connected with the cylinder cover 2.

[0030] In this embodiment: the number of the oil inlet pipe 5 is two, one oil inlet pipe 5 corresponds to one hydraulic cylinder 401, the hydraulic oil can be injected into the inner cavity of the hydraulic cylinder 401 through the oil inlet pipe 5, the surface of the push block 6 is provided with a positioning groove matched with the abutting block 11, allowing the push block 6 to pass smoothly, the second spring 8 can make the push block 6 automatically reset when the worker releases the pressing rod 7, improving the convenience of manual locking, the number of the limiting block 9 is four, which can limit the movement range of the push block 6, the number of the limiting groove 10 is two, which can limit the movement mode of the push block 6, the number of the abutting block 11 is four, which can limit the movement range of the piston 402, avoiding the piston 402 exceeding the range of the oil inlet pipe 5 and causing the hydraulic oil to contact the fixed rod 403, the number of the sealing gasket 12 is two, avoiding the hydraulic oil flowing out of the cylinder body 1 through the slot 406, the number of the rubber ring 13 is two, preventing the hydraulic oil from flowing out of the cylinder body 1.

[0031] The utility model discloses an implementation principle is: when using, through oil inlet pipe 5 injects hydraulic oil to the inside of hydraulic cylinder 401, and hydraulic oil promotes piston 402 to move along the inner chamber of hydraulic cylinder 401, and piston 402 drives fixed rod 403 to move, because the sliding block 405 is limited only can carry out horizontal motion by the notch 406, and through fixed rod 403 moves, make the space of chute 404 gradually small, and the sliding block 405 is extruded to one side and moves when the slope of chute 404 gradually small, and the sliding block 405 then drives arc plate 407 to move, and arc plate 407 drives protruding block 410 and recess 411 on push rod 3 to carry out the clamping of engaging, and can complete locking, and when needing manual locking, then can through push pressure rod 7, and pressure rod 7 drives push block 6 to move, and push block 6 then promotes piston 402 to move, when staff releases pressure rod 7, and second spring 8 then drives push block 6 to reset, and pressure rod 7 follows push block 6 reset.

[0032] The above are all the preferred embodiments of the utility model, and not in this way limit the protection scope of the utility model, so: all equivalent changes made according to the structure, shape, principle of the utility model should be covered in the protection scope of the utility model.

Claims

1. A hydraulic cylinder with locking function, comprising a cylinder body (1), characterized in that: The cylinder (1) is screw connected with a cylinder cover (2) on one side, a push rod (3) is slidably connected in the inner cavity of the cylinder (1), and locking mechanisms (4) are fixedly connected to the cylinder (1) on both sides; The locking mechanism (4) comprises a hydraulic cylinder (401), the hydraulic cylinder (401) is fixedly connected with the cylinder (1) on one side, a piston (402) is slidably connected in the inner cavity of the hydraulic cylinder (401), the piston (402) is fixedly connected with a fixed rod (403) on one side, a chute (404) is formed in the fixed rod (403) on one side, a sliding block (405) is slidably connected in the inner cavity of the chute (404), a notch (406) is formed in the surface of the cylinder (1), the sliding block (405) penetrates through the inner cavity of the notch (406) on one side and is fixedly connected with an arc-shaped plate (407), guide columns (408) are fixedly connected to the sliding block (405) on both sides, first springs (409) are arranged on the surfaces of the guide columns (408), the first springs (409) are fixedly connected with the cylinder (1) on one side, a protrusion (410) is fixedly connected in the inner cavity of the arc-shaped plate (407), a recess (411) is formed in the surface of the push rod (3), and the protrusion (410) is slidably connected with the recess (411) on one side.

2. The hydraulic cylinder with locking function according to claim 1, characterized in that: An oil inlet pipe (5) is arranged on one side of the piston (402), and the oil inlet pipe (5) is fixedly connected with the hydraulic cylinder (401) on one side.

3. The hydraulic cylinder with locking function according to claim 1, characterized in that: A push block (6) is slidably connected in the inner cavity of the hydraulic cylinder (401) on one side, the push block (6) is fixedly connected with a pressing rod (7) on one side, second springs (8) are arranged on the surface of the pressing rod (7), and the second springs (8) are fixedly connected with the hydraulic cylinder (401) on one side.

4. The hydraulic cylinder with locking function according to claim 3, characterized in that: A limiting block (9) is arranged on one side of the push block (6), and the limiting block (9) is fixedly connected with the hydraulic cylinder (401) on one side.

5. The hydraulic cylinder with locking function according to claim 3, characterized in that: A limiting groove (10) is formed in the inner cavity of the hydraulic cylinder (401), and the push block (6) is slidably connected with the limiting groove (10) on one side.

6. The hydraulic cylinder with locking function according to claim 1, characterized in that: A resisting block (11) is arranged at the bottom of the piston (402), and the resisting block (11) is fixedly connected with the hydraulic cylinder (401) on one side.

7. The hydraulic cylinder with locking function according to claim 1, characterized in that: A sealing gasket (12) is arranged on the surface of the sliding block (405), and the sealing gasket (12) is fixedly connected with the cylinder (1) on one side.

8. The hydraulic cylinder with locking function according to claim 1, characterized in that: A rubber ring (13) is arranged on the surface of the push rod (3), and the rubber ring (13) is fixedly connected with the cylinder cover (2) on one side.

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