Self-locking type multi-cavity hydraulic oil cylinder

Abstract

The utility model belongs to the technical field of hydraulic oil cylinders, and discloses a self-locking type multi-cavity hydraulic oil cylinder which comprises a cylinder body. The cylinder body is a vertical hollow cylindrical shell, a pair of partition plates which are perpendicular to each other and penetrate through the central axis of the cylinder body is fixed in the cylinder body, the two partition plates divide the interior of the cylinder body into four sealed oil cavities, and a pair of oil ports are formed in the positions, on the corresponding sides of the oil cavities, of the peripheral wall of the cylinder body. The two oil ports of any oil cavity are located in the positions, close to the two ends, of the peripheral wall of the cylinder body. Sliding blocks are slidably connected into the oil cavities, and the side walls of the sliding blocks are attached to the partition plate and the inner wall of the cylinder body. Piston rods are fixed to the sliding blocks, and each piston rod comprises a rack which is coaxial with the cylinder body and fixed to the corresponding sliding block; the rack on the piston rod is locked through the locking assembly, so that the stability in the working process is guaranteed; any end of the cylinder body is provided with two piston rods, one or two piston rods at the end can be selectively driven to stretch out according to actual needs, and the flexibility and the bearing capacity of the hydraulic oil cylinder can be improved.

Description

Technical Field

[0001] The present disclosure belongs to the technical field of hydraulic cylinders, and particularly relates to a self-locking multi-chamber hydraulic cylinder. Background Art

[0002] In current engineering applications, lifting heavy objects usually relies on hydraulic cylinders, which push the piston rod by injecting hydraulic oil into the cylinder body to achieve the lifting operation of heavy objects. However, this traditional single driving method has some limitations when facing the challenges of lifting heavy objects. First, this single oil injection and pressurization method limits the application flexibility of hydraulic cylinders in complex working conditions because it usually can only achieve one-way driving. When two-way motion control is required, the position of the driving rod of the hydraulic cylinder needs to be adjusted continuously, which has great limitations. Second, when lifting heavy objects with a relatively large mass, the load-bearing capacity of traditional hydraulic cylinders is sometimes limited, and excessive oil injection and pressurization easily increase the risk of the driving rod breaking. Therefore, the hydraulic cylinders in the prior art have problems of poor flexibility and insufficient load-bearing capacity. Summary of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the purpose of the present disclosure is to provide a self-locking multi-chamber hydraulic cylinder, which solves the problems of poor flexibility and insufficient load-bearing capacity of the hydraulic cylinders in the prior art.

[0004] The purpose of the present disclosure can be achieved by the following technical solutions:

[0005] A self-locking multi-chamber hydraulic cylinder includes a cylinder body;

[0006] The cylinder body is a vertical and internally hollow cylindrical shell. A pair of partitions perpendicular to each other and both passing through the central axis of the cylinder body are fixed inside the cylinder body. The two partitions divide the inside of the cylinder body into four sealed oil chambers. A pair of oil ports are opened on the circumferential wall of the cylinder body corresponding to each oil chamber, and both oil ports of any one oil chamber are respectively located at positions near both ends of the circumferential wall of the cylinder body;

[0007] Sliders are slidably connected inside the oil chambers, and the side walls of the sliders are in contact with the partitions and the inner wall of the cylinder body;

[0008] Piston rods are fixed on the sliders. Each piston rod includes a rack coaxially placed with the cylinder body and fixed on the slider. A driving rod coaxially placed is fixed at the end of the rack far from the slider. Any two piston rods are fixed at the lower ends of the corresponding sliders, and the other two piston rods are fixed at the upper ends of the corresponding sliders. The driving rods all pass through the end faces of the corresponding ends of the cylinder body and are slidably connected thereto;

[0009] Locking components are arranged inside the oil chambers, and the piston rod and the locking component in any one oil chamber are located on the same side of the slider. The locking component can be used to lock the rack.

[0010] The above technical solution has the following principle and effects:

[0011] By changing the working states of the two oil ports, the slider and the piston rod can be driven to move up and down; and in this application, the four piston rods of the hydraulic cylinder are divided into two groups, and the piston rods of the two groups can extend towards both ends of the cylinder block respectively for operation, realizing the bidirectional driving operation of the hydraulic oil rod. When the piston rod extends to the required position, the rack on the piston rod can be locked by the locking component to ensure the stability during the working process; and there are two piston rods at either end of the cylinder block, and one or two piston rods at this end can be selectively driven to extend according to actual needs, improving the flexibility and load-bearing capacity of the hydraulic cylinder.

[0012] The locking components each include a gear, and the gears are each meshed with the rack in the corresponding piston rod. The gears are each fixedly sleeved on a rotating shaft, and the rotating shafts are each rotatably connected to any partition plate. On the peripheral wall of the cylinder block, there are slidingly clamped sliding rods coaxially placed with the rotating shafts. At the end of the rotating shaft close to the sliding rod, a card slot is opened. At the end of the sliding rod close to the rotating shaft, there is a rotating motor coaxially placed and fixed. The output end of the rotating motor is fixed with a card block adapted to the card slot, and the end of the sliding rod far from the rotating shaft extends to the outside of the cylinder block;

[0013] On each sliding rod, there is a fixed block sleeved and slidably connected, and the fixed blocks are each fixed on the inner wall of the cylinder block. On each sliding rod, there is a spring sleeved. The spring is located between the fixed block and the rotating motor, and the two ends of the spring are respectively fixed to the fixed block and the rotating motor. The spring is always in a compressed state;

[0014] At the end of the sliding rod located outside the cylinder block, there is a pull handle fixedly connected;

[0015] On the outer side wall of the cylinder block at the upper position of any sliding rod, there is a vertically placed first chute. In the first chute, there is a contact member slidingly clamped. At the lower end of the contact member, there is a groove for placing the sliding rod. When the contact member moves down until the sliding rod is located in the groove and the contact member is located between the pull handle and the cylinder block, the card block is completely separated from the card slot;

[0016] On the peripheral wall of the sliding rod, there is a second chute coaxially placed with it, and the peripheral wall of the cylinder block is slidingly clamped with the second chute;

[0017] The rotating motor is a rechargeable type, and there is a charging socket for charging the rotating motor on the pull handle. The charging wire of the rotating motor is arranged in the sliding rod and connected to the charging socket.

[0018] The explanations of the nouns, conjunctions or adjectives involved in the above technical solution are as follows:

[0019] Fixed connection: It refers to the process of connecting two separated profiles or parts into a complex part or component by fasteners such as screws, bolts and rivets.

[0020] Sliding connection: Two objects are in contact but not fixed, and they can slide relative to each other.

[0021] Advantages of the present disclosure:

[0022] 1. By changing the working states of the two oil ports, the slider and the piston rod can be driven to move up and down; in this application, the four piston rods of the hydraulic cylinder are divided into two groups, and the piston rods of the two groups can extend towards both ends of the cylinder block respectively for operation, realizing the bidirectional driving operation of the hydraulic oil rod. When the piston rod extends to the required position, the rack on the piston rod can be locked by the locking component to ensure the stability during the working process; and there are two piston rods at each end of the cylinder block, and one or two piston rods at this end can be selectively driven to extend according to actual needs, improving the flexibility and load-bearing capacity of the hydraulic cylinder;

[0023] When in the non-working state, the two groups of piston rods contract into different oil cavities of the cylinder block, and the volume of the hydraulic cylinder after complete contraction is small;

[0024] 2. Through the settings of the gear, rotating shaft, sliding rod, card slot, and card block, it is convenient to lock or release the rack; at the same time, with the settings of the fixed block and the spring, using the elastic force of the spring, it can prevent the sliding rod from accidentally sliding away from the rotating shaft end and causing the locking to fail, ensuring the stability of the locking work;

[0025] And through the settings of the first chute, abutting block, and groove, when the piston rod needs to move up and down freely, the pull bar can be pulled to withdraw the card block from the card slot, and the abutting member can be pushed to insert between the pull bar and the cylinder block, so as to maintain a stable separation state between the card block and the card slot, without the need for someone to always hold the sliding rod;

[0026] 3. Through the setting of the rechargeable rotating motor, combined with the charging socket on the pull bar, it is convenient to charge the rotating motor. Description of the drawings

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 It is a schematic diagram of the overall structure of the present disclosure;

[0029] Figure 2 It is a schematic diagram of the partial structure inside the cylinder block of the present disclosure;

[0030] Figure 3 It is a schematic diagram of the partial structure at the rack of the present disclosure;

[0031] Figure 4It is a schematic diagram of a partial structure at the partition plate and the slider of the present disclosure;

[0032] Figure 5 It is a schematic diagram of a partial structure at the spring of the present disclosure;

[0033] Figure 6 It is a schematic diagram of a partial structure at the clamping block of the present disclosure. Specific embodiments

[0034] Next, the technical solutions in the embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present disclosure.

[0035] Herein, in conjunction with Figures 1 to 6 to describe an embodiment of a self-locking multi-chamber hydraulic cylinder. Specifically, the self-locking multi-chamber hydraulic cylinder is configured as a split structure, which has components such as a cylinder block 100, a partition plate 101, an oil chamber 200, an oil port 102, a slider 300, a rack 400, a driving rod 401, and a locking assembly 500, etc. It can realize the two-way driving operation of the hydraulic oil rod, and when the piston rod extends to the required position, the rack 400 on the piston rod can be locked by the locking assembly 500 to ensure the stability during the working process; and two piston rods are provided at either end of the cylinder block 100, and one or two piston rods at this end can be selectively driven to extend according to actual needs, which can improve the flexibility and load-bearing capacity of the hydraulic cylinder;

[0036] When not in the working state, the two groups of piston rods retract into different oil chambers 200 of the cylinder block 100, and the volume of the hydraulic cylinder block 100 after complete contraction is small.

[0037] Please refer to Figures 1 to 6 , a self-locking multi-chamber hydraulic cylinder, including a cylinder block 100:

[0038] The cylinder block 100 is a vertical and internally hollow cylindrical shell. A pair of partition plates 101 that are perpendicular to each other and both pass through the central axis of the cylinder block 100 are fixed inside the cylinder block 100. The two partition plates 101 divide the interior of the cylinder block 100 into four sealed oil chambers 200. A pair of oil ports 102 are opened on the peripheral wall of the cylinder block 100 corresponding to the oil chambers 200, and the two oil ports 102 of any oil chamber 200 are respectively located at positions near both ends of the peripheral wall of the cylinder block 100;

[0039] Sliders 300 are slidably connected in the oil chambers 200, and the side walls of the sliders 300 are attached to the partition plates 101 and the inner wall of the cylinder block 100;

[0040] On the slider 300, piston rods are fixedly installed. The piston rods each include a rack 400 that is coaxially placed with the cylinder block 100 and fixed to the slider 300. At the end of the rack 400 away from the slider 300, a coaxially placed drive rod 401 is fixedly installed. Any two piston rods are fixed to the lower ends of the corresponding sliders 300, and the other two piston rods are fixed to the upper ends of the corresponding sliders 300. Moreover, the drive rods 401 all pass through the end faces of the corresponding ends of the cylinder block 100 and are slidably connected thereto;

[0041] In the oil chambers 200, locking components 500 are provided. And in any one of the oil chambers 200, the piston rod and the locking component 500 are located on the same side of the slider 300. The locking component 500 can be used to lock the rack 400;

[0042] The cylinder block 100 is usually made of aluminum alloy, steel or cast iron. These materials have high strength and corrosion resistance. The specific selection depends on the requirements of the application and the working environmental conditions; during the manufacturing process, processes such as casting, milling and precision machining can be used to ensure its dimensional accuracy and surface flatness.

[0043] The slider 300 is a movable part in the oil chamber 200. Its side wall fits with the partition 101 and the inner wall of the cylinder block 100 to ensure the sealing between the slider 300 and the oil chamber 200. At the same time, the surface of the slider 300 should be smooth to ensure the smoothness of movement.

[0044] The material of the drive rod 41 is usually selected as high-strength alloy steel or stainless steel to withstand large tensile or compressive forces. The surface treatment of the drive rod 401 may include polishing, chrome plating or other coatings to enhance its wear resistance and working life. A rubber cap can be fixed to the end of the drive rod 401 away from the slider 300.

[0045] During operation, when any one of the oil ports 102 in any one of the oil chambers 200 is used to inject hydraulic oil and the other oil port 102 is used for oil discharge, the slider 300 drives the piston rod to move from the oil port 102 at the oil injection end to the oil port 102 at the oil discharge end. By changing the working states of the two oil ports 102, the slider 300 and the piston rod can be driven to move up and down; and in this application, the four piston rods of the hydraulic cylinder are divided into two groups. The piston rods of the two groups can respectively extend to both ends of the cylinder block 100 for operation, realizing the bidirectional driving operation of the hydraulic oil rod. And when the piston rod extends to the required position, the rack 400 on the piston rod can be locked by the locking component 500 to ensure the stability during the working process; and there are two piston rods at each end of the cylinder block 100. One or two piston rods at this end can be selectively driven to extend according to actual needs, improving the flexibility and load-bearing capacity of the hydraulic cylinder;

[0046] When in the non-working state, the two groups of piston rods retract into different oil chambers 200 of the cylinder block 100, and the volume of the hydraulic cylinder body 100 after complete retraction is small.

[0047] To lock or release the rack 400, the locking assembly 500 includes a gear 501. The gear 501 meshes with the rack 400 in the corresponding piston rod. The gear 501 is fixedly sleeved on a rotating shaft 502. The rotating shaft 502 is rotatably connected to any partition plate 101. A slide bar 503 coaxially placed with the rotating shaft 502 is slidably clamped on the peripheral wall of the cylinder block 100. A card slot 5021 is formed at the end of the rotating shaft 502 close to the slide bar 503. A rotating motor 504 coaxially placed is fixed at the end of the slide bar 503 close to the rotating shaft 502. A card block 505 adapted to the card slot 5021 is fixed at the output end of the rotating motor 504. The end of the slide bar 503 far from the rotating shaft 502 extends to the outside of the cylinder block 100. When the slider 300 and the piston rod need to move, the slide bar 503 is pulled to drive the card block 505, so that the card block 505 is pulled out of the card slot 5021. At this time, the slider 300 and the rack 400 can move up and down freely, and the rack 400 drives the gear 501 and the rotating shaft 502 to rotate during the movement. When the piston rod extends to the required position during work, the rotating motor 504 can be used to drive the card block 505 to rotate for angle adjustment, and then the slide bar 503 is pushed to insert the card block 505 into the card slot 5021. Since the slide bar 503 is slidably clamped with the cylinder block 100 and the slide bar 503 cannot rotate, the rotating shaft 502, the gear 501 and the rack 400 are locked through the cooperation of the slide bar 503, the card block 505 and the card slot 5021.

[0048] To prevent the slide bar 503 from accidentally moving away after locking, a fixed block 506 with a sliding connection is sleeved on the slide bar 503. The fixed block 506 is fixed on the inner wall of the cylinder block 100. A spring 507 is sleeved on the slide bar 503. The spring 507 is located between the fixed block 506 and the rotating motor 504. Both ends of the spring 507 are fixed to the fixed block 506 and the rotating motor 504 respectively. The spring 507 is always in a compressed state. Through the setting of the spring 507 in the compressed state, the elastic force of the spring 507 can be used to prevent the slide bar 503 from accidentally sliding away from the end of the rotating shaft 502.

[0049] To facilitate pulling the slide bar 503, a pull handle 508 is fixedly connected to one end of the slide bar 503 located outside the cylinder block 100, which is convenient to drive the slide bar 503 through the pull handle 508.

[0050] When the piston rod moves up and down freely, in order not to affect its movement, it is necessary to keep the stable separation state between the clamping block 505 and the clamping groove 5021. The outer wall of the cylinder block 100 is provided with a vertically placed first sliding groove 103 at the upper end position of any sliding rod 503. A contact member 600 is slidably clamped in each first sliding groove 103. A groove 601 for placing the sliding rod 503 is provided at the lower end of the contact member 600. When the contact member 600 moves down until the sliding rod 503 is located in the groove 601 and the contact member 600 is located between the pull handle 508 and the cylinder block 100, the clamping block 505 is completely separated from the clamping groove 5021. When the piston rod needs to move up and down freely, the pull handle 508 can be pulled to drive the clamping block 505 to be withdrawn from the clamping groove 5021, and the contact member 600 is pushed to be inserted between the pull handle 508 and the cylinder block 100, so as to maintain the stable separation state between the clamping block 505 and the clamping groove 5021, and there is no need for someone to always hold the sliding rod 503.

[0051] A second sliding groove is provided on the peripheral wall of the sliding rod 503 and is placed coaxially with it. The peripheral wall of the cylinder block 100 is slidably clamped with the second sliding groove; this improves the guiding property during its movement, and at the same time limits and restricts the sliding rod 503 to prevent it from rotating.

[0052] The rotating motor 504 is a rechargeable type. A charging socket for charging the rotating motor 504 is provided on the pull handle 508. The charging wire of the rotating motor 504 is arranged in the sliding rod 503 and is connected to the charging socket; this is convenient for charging the rotating motor 504.

[0053] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0054] The above shows and describes the basic principles, main features and advantages of the present disclosure. Those skilled in the art of this industry should understand that the present disclosure is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present disclosure. Without departing from the spirit and scope of the present disclosure, the present disclosure will have various changes and improvements, and these changes and improvements all fall within the scope of the present disclosure claimed.

Claims

1. A self-locking multi-chamber hydraulic cylinder, comprising a cylinder body (100), characterized in that: The cylinder body (100) is a vertical cylindrical shell with a hollow interior. A pair of partitions (101) are fixed inside the cylinder body (100) and are perpendicular to each other and both pass through the central axis of the cylinder body (100). The two partitions (101) separate the interior of the cylinder body (100) into four sealed oil chambers (200). A pair of oil ports (102) are provided on the peripheral wall of the cylinder body (100) on the corresponding sides of the oil chamber (200), and the two oil ports (102) of any oil chamber (200) are respectively located on the peripheral wall of the cylinder body (100) near both ends; The oil chamber (200) is slidably connected with a slider (300), and the side wall of the slider (300) is in contact with the partition plate (101) and the inner wall of the cylinder body (100); The sliders (300) are all fixed with piston rods, and the piston rods all include a rack (400) coaxially placed with the cylinder body (100) and fixed on the slider (300), and the ends of the rack (400) away from the slider (300) are all fixed with coaxially placed drive rods (401), wherein any two piston rods are fixed to the lower ends of the corresponding sliders (300), and the other two piston rods are fixed to the upper ends of the corresponding sliders (300), and the drive rods (401) all pass through the end faces of the corresponding ends of the cylinder body (100) and are slidably connected thereto; A locking assembly (500) is provided in each oil chamber (200), and the piston rod and the locking assembly (500) in any oil chamber (200) are located on the same side of the slider (300). The locking assembly (500) can be used to lock the rack (400).

2. The self-locking multi-chamber hydraulic cylinder according to claim 1, characterized in that: The locking components (500) all include gears (501), the gears (501) all mesh with the racks (400) in the corresponding piston rods, the gears (501) all are fixedly sleeved on the rotating shaft (502), the rotating shaft (502) all are rotatably connected to any partition (101), a slide bar (503) coaxially arranged with the rotating shaft (502) is slidably engaged on the peripheral wall of the cylinder body (100), a slot (5021) is provided at the end of the rotating shaft (502) close to the slide bar (503), a rotating motor (504) coaxially arranged is fixed at the end of the sliding rod (503) close to the rotating shaft (502), a block (505) matched with the slot (5021) is fixed at the output end of the rotating motor (504), and the end of the sliding rod (503) away from the rotating shaft (502) extends to the outside of the cylinder body (100).

3. The self-locking multi-chamber hydraulic cylinder according to claim 2, characterized in that: The slide bars (503) are sleeved with fixed blocks (506) in sliding connection, and the fixed blocks (506) are fixed on the inner wall of the cylinder body (100). The slide bars (503) are sleeved with springs (507), and the springs (507) are located between the fixed blocks (506) and the rotating motor (504). The two ends of the springs (507) are respectively fixed to the fixed blocks (506) and the rotating motor (504), and the springs (507) are always in a compressed state.

4. The self-locking multi-chamber hydraulic cylinder according to claim 3, characterized in that: One end of the slide rod (503) located outside the cylinder body (100) is fixedly connected to a pull handle (508).

5. The self-locking multi-chamber hydraulic cylinder according to claim 4, characterized in that: The outer wall of the cylinder body (100) is provided with a vertically placed first sliding groove (103) at the upper end of any sliding rod (503), and a resistance member (600) is slidably engaged in the first sliding groove (103). The lower end of the resistance member (600) is provided with a groove (601) for placing the sliding rod (503). When the resistance member (600) moves down to the sliding rod (503) and is located in the groove (601), and the resistance member (600) is located between the handle (508) and the cylinder body (100), the block (505) and the groove (5021) are completely separated.

6. The self-locking multi-chamber hydraulic cylinder according to claim 5, characterized in that: A second sliding groove coaxially arranged therewith is provided on the peripheral wall of the sliding rod (503), and the peripheral wall of the cylinder body (100) is slidably engaged with the second sliding groove.

7. The self-locking multi-chamber hydraulic cylinder according to claim 6, characterized in that: The rotating motor (504) is configured to be rechargeable, and a charging socket for charging the rotating motor (504) is provided on the pull handle (508). The charging line of the rotating motor (504) is arranged in the slide bar (503) and connected to the charging socket.

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