Multi-stage adjustable hydraulic cylinder structure

Abstract

The utility model discloses a multistage adjustable hydraulic cylinder structure, which comprises a cylinder body and a plurality of multistage hydraulic rods sleeved on the cylinder body, the cylinder body is provided with a liquid inlet for feeding liquid, and the cylinder body and the plurality of multistage hydraulic rods are fixedly connected with self-locking mechanisms. The self-locking mechanism comprises an equipment shell fixed to the front end of the cylinder body, fixing rings are fixedly connected to the interiors of the two ends of the equipment shell, springs are fixedly connected to the side faces of the fixing rings, straight rods are movably connected to the fixing rings, and ejection balls used for locking the cylinder body are fixedly connected to the straight rods. By arranging the self-locking mechanism, stable locking of the hydraulic cylinder at a specific position is achieved, the problem that existing equipment is prone to displacement when working at the specific position for a long time due to the fact that no self-locking mechanism exists is effectively solved, the working accuracy and reliability are improved, heavy objects are prevented from falling accidentally, and safety is guaranteed; and the equipment can be kept in a state in case of power failure or fault.

Description

Technical Field

[0001] This utility model relates to the field of multi-stage hydraulic cylinder technology, specifically a multi-stage adjustable hydraulic cylinder structure. Background Technology

[0002] Multistage hydraulic cylinders are hydraulic actuators that play an important role in many fields. In modern industry, the demand for efficient and reliable actuators is increasing, leading to the development of multistage hydraulic cylinders. Their background technology mainly stems from the following aspects: Firstly, with the continuous expansion of engineering construction scale, such as large-scale building construction and bridge construction, greater output force and stroke are required to complete complex tasks. Traditional single-stage hydraulic cylinders cannot meet these needs in some cases. Multistage hydraulic cylinders, through the structural design of multi-stage sleeves, can achieve longer strokes and greater thrust within limited installation space. Secondly, in fields such as machinery manufacturing and mining equipment, there are high requirements for the compactness and flexibility of equipment. Multistage hydraulic cylinders can provide greater working capacity without increasing the volume too much, adapting to different working environments.

[0003] However, in some work scenarios where existing equipment needs to maintain a specific position for a long time, the lack of a self-locking mechanism makes it difficult for the hydraulic cylinder to be stably locked in the required position. This can easily lead to displacement due to external interference or system pressure fluctuations, affecting the accuracy and reliability of the work, causing the heavy object to fall unexpectedly, and posing a serious safety hazard. Secondly, in the event of a sudden power outage or hydraulic system failure during equipment operation, the multi-stage hydraulic cylinder without a self-locking mechanism cannot maintain its current state, which may cause work interruption or even equipment damage and accidents. Furthermore, the lack of a self-locking mechanism also limits the application of multi-stage hydraulic cylinders on some special angles or inclined working surfaces. The inability to self-lock makes it difficult for the hydraulic cylinder to stably support the load when working in a non-horizontal position, reducing the adaptability and versatility of the equipment.

[0004] To address these issues, this invention provides a multi-stage adjustable hydraulic cylinder structure. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a multi-stage adjustable hydraulic cylinder structure, which solves the problem mentioned above that, due to the lack of a self-locking mechanism, the hydraulic cylinder cannot be stably locked in the required position, is prone to displacement due to external interference or system pressure fluctuations, affects the accuracy and reliability of the work, and can lead to the unexpected descent of heavy objects, resulting in serious safety hazards.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a multi-stage adjustable hydraulic cylinder structure, including a cylinder body and multiple multi-stage hydraulic rods sleeved on the cylinder body, wherein the cylinder body is provided with a liquid inlet for liquid inlet, and the cylinder body and the multiple multi-stage hydraulic rods are all externally fixedly connected with a self-locking mechanism.

[0007] The self-locking mechanism includes a housing fixed to the front end of the cylinder. Fixed rings are fixedly connected to the interior of both ends of the housing, and springs are fixedly connected to the sides of the fixed rings. A straight rod is movably connected to the fixed rings, and a top ball for locking the cylinder is fixedly connected to the straight rod. The springs are fixed between the fixed rings and the top ball, allowing the top ball to automatically pop out to lock the cylinder and multiple multi-stage hydraulic rods. The front ends of the cylinder and multiple multi-stage hydraulic rods are each provided with grooves matching the top ball, so that the top ball locks the multiple multi-stage hydraulic rods when it pops out. A movable block is fixedly connected to the other end of the straight rod, and the movable block slides inside the housing. Limiting rods are slidably connected to both sides of the housing, and straight grooves matching the limiting rods are provided on the movable blocks. A sloped groove is fixedly connected to the bottom end of the limiting rod, so that when the limiting rod moves, it drives the movable block to slide through the sloped groove, thereby pulling the top ball to move.

[0008] Preferably, the bottom of the cylinder is fixedly connected to a connecting pipe for connecting to external equipment, so as to fix it to the external equipment by means of a pin.

[0009] Preferably, the ends of the multi-stage hydraulic rods are provided with annular grooves that match the top ball, and rubber pads are fixedly connected to the inner walls of the annular grooves to increase the friction between the top ball and the annular grooves.

[0010] Preferably, the movable block is fixedly connected to both sides of the movable block, and the inside of the device housing is fixedly connected to a movable groove that matches the limiting block, so that the movable block can slide inside the device housing.

[0011] Preferably, a pad is fixedly connected to the bottom of the inclined groove, and the pad is larger than the cross-section of the limiting rod so that the limiting rod will not come off when it moves on the equipment housing.

[0012] Preferably, the multiple self-locking mechanisms correspond to multiple multi-stage hydraulic rods that are proportionally reduced in size, and the multiple equipment housings are all movably connected to the multiple limit rods.

[0013] This invention provides a multi-stage adjustable hydraulic cylinder structure. Compared with the prior art, it has the following advantages:

[0014] (1) The multi-stage adjustable hydraulic cylinder structure achieves stable locking of the hydraulic cylinder at a specific position by setting a self-locking mechanism. The self-locking mechanism includes components such as the equipment shell, fixed ring, spring, straight rod, and top ball. When the hydraulic rod extends to the required position, it drives the movable block to slide through the inclined groove, pulling the top ball into the fixed ring. When the top ball is aligned with the groove or ring groove, the spring pushes the top ball to pop out and lock the hydraulic rod. This effectively solves the problem that existing equipment is prone to displacement when maintaining a specific position for a long time due to the lack of a self-locking mechanism, improves the accuracy and reliability of the work, avoids the accidental drop of heavy objects, ensures safety, and also enables the equipment to maintain its state when the power is off or there is a malfunction.

[0015] (2) This multi-stage adjustable hydraulic cylinder structure achieves a better locking effect by setting an annular groove with a rubber pad at the end of the multi-stage hydraulic rod. When the top ball pops out and enters the annular groove, the rubber pad increases the friction between the top ball and the annular groove, so that the hydraulic rod can be locked more stably in the required position. This overcomes the limitation of existing multi-stage hydraulic cylinders lacking a self-locking mechanism and being difficult to stably support the load when used in special angles or inclined working surfaces, and improves the adaptability and versatility of the equipment, enabling it to work better in different working environments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the external structure of this utility model;

[0017] Figure 2 This is a three-dimensional view of the working structure of this utility model;

[0018] Figure 3 This is a cross-sectional view of the self-locking mechanism structure of this utility model;

[0019] Figure 4 This is a three-dimensional disassembled view of the self-locking mechanism structure of this utility model.

[0020] In the diagram: 1. Cylinder body; 2. Connecting pipe; 3. Liquid inlet; 4. Multi-stage hydraulic rod; 5. Self-locking mechanism; 51. Equipment shell; 52. Limiting rod; 53. Inclined groove; 54. Pad; 55. Movable block; 56. Fixed ring; 57. Top ball; 58. Spring; 59. Groove; 510. Straight rod; 511. Limiting block; 6. Ring groove. Detailed Implementation

[0021] 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. Example

[0022] Please see Figures 1 to 4 A multi-stage adjustable hydraulic cylinder structure includes a cylinder body 1 and multiple multi-stage hydraulic rods 4 sleeved on the cylinder body 1. The cylinder body 1 is provided with a liquid inlet 3 for liquid inlet. The cylinder body 1 and the multiple multi-stage hydraulic rods 4 are all externally fixedly connected with a self-locking mechanism 5.

[0023] The self-locking mechanism 5 includes a housing 51 fixed to the front end of the cylinder body 1. Both ends of the housing 51 are fixedly connected to retaining rings 56, and springs 58 are fixedly connected to the sides of the retaining rings 56. A straight rod 510 is movably connected to the retaining rings 56, and a ball joint 57 for locking the cylinder body 1 is fixedly connected to the straight rod 510. The springs 58 are fixed between the retaining rings 56 and the ball joint 57, so that the ball joint 57 can automatically pop out to lock the cylinder body 1 and the multiple multi-stage hydraulic rods 4. The front ends of the cylinder body 1 and the multiple multi-stage hydraulic rods 4 are open. A groove 59 matching the top ball 57 is provided so that multiple multi-stage hydraulic rods 4 are locked when the top ball 57 pops out. The other end of the straight rod 510 is fixedly connected to a movable block 55, and the movable block 55 slides inside the equipment housing 51. Limiting rods 52 are slidably connected to both sides of the equipment housing 51, and a straight groove matching the limiting rod 52 is provided on the movable block 55. The bottom end of the limiting rod 52 is fixedly connected to an inclined groove 53 so that when the limiting rod 52 moves, it drives the movable block 55 to slide through the inclined groove 53 to pull the top ball 57 to move. Example

[0024] Please see Figures 1 to 4 This embodiment provides a technical solution based on embodiment one: the bottom of the cylinder 1 is fixedly connected to a connecting pipe 2 for connecting to external equipment, so as to fix it to the external equipment through a pin shaft; the ends of the multi-stage hydraulic rods 4 are all provided with annular grooves 6 that match the top ball 57, and rubber pads are fixedly connected to the inner wall of the annular grooves 6 to increase the friction between the top ball 57 and the annular grooves 6; limit blocks 511 are fixedly connected to both sides of the movable block 55, and movable grooves that match the limit blocks 511 are fixedly connected inside the equipment housing 51, so that the movable block 55 can slide inside the equipment housing 51; a pad 54 is fixedly connected to the bottom of the inclined groove 53, and the pad 54 is larger than the cross-section of the limit rod 52 so that the limit rod 52 will not come out when it moves on the equipment housing 51; multiple self-locking mechanisms 5 correspond to multiple multi-stage hydraulic rods 4 in proportionally reduced size, and multiple equipment housings 51 are movably connected to multiple limit rods 52.

[0025] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0026] Working principle: During operation, hydraulic oil first enters cylinder 1 through inlet 3. As hydraulic oil is continuously injected, the internal pressure of cylinder 1 gradually increases, thereby pushing the multi-stage hydraulic rod 4 to extend. When the multi-stage hydraulic rod 4 extends to the desired position, it drives the limit rod 52 to move. Since the bottom end of the limit rod 52 is fixedly connected to the inclined groove 53, when the limit rod 52 moves, the inclined surface on the inclined groove 53 will cause the movable block 55 to move towards the inside of the equipment shell 51. The movable block 55 has a... A straight groove matching the limiting rod 52 is provided, and the movable block 55 slides inside the equipment housing 51. The equipment housing 51 also has a fixed movable groove matching the limiting blocks 511 on both sides of the movable block 55. This ensures that the movable block 55 can slide stably inside the equipment housing 51. Driven by the inclined groove 53, the movable block 55 begins to slide inside the equipment housing 51. The other end of the movable block 55 is connected to the top ball 57 via a straight rod 510. When the movable block 55 slides, it will slide through the straight rod 510... 10. Pulling the top ball 57 causes it to overcome the elastic force of the spring 58, compressing the spring 58 and retracting it into the retaining ring 56. When the top ball 57 aligns with the groove 59 at the front end or the annular groove 6 at the end of the multi-stage hydraulic rod 4 (when the multi-stage hydraulic rod 4 is fully extended), the spring 58, having stored elastic potential energy due to previous compression, will quickly push the top ball 57 out, causing it to enter the groove 59 or annular groove 6. Because a rubber pad is fixedly connected to the inner wall of the annular groove 6 at the end of the multi-stage hydraulic rod 4, the... The friction between the top ball 57 and the annular groove 6 is increased, thereby more effectively locking the multi-stage hydraulic rod 4 and stabilizing it in the required position, preventing displacement due to external interference or system pressure fluctuations. When the multi-stage hydraulic rod 4 needs to retract, the above process of retracting and ejecting the top ball 57 is repeated, that is, the movable block 55 is driven to slide through the inclined groove 53, pulling the top ball 57 out of the groove 59 or the annular groove 6. At this time, the hydraulic oil flows back under the action of the relevant system, and the multi-stage hydraulic rod 4 retracts under the action of the hydraulic oil flow.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-stage adjustable hydraulic cylinder structure, comprising a cylinder body (1) and a plurality of multi-stage hydraulic rods (4) sleeved on the cylinder body (1), characterized in that: The cylinder (1) is provided with an inlet (3) for liquid inlet, and the cylinder (1) and the external of the multiple multi-stage hydraulic rods (4) are all fixedly connected with a self-locking mechanism (5). The self-locking mechanism (5) includes a device housing (51) fixed to the front end of the cylinder (1). Fixed rings (56) are fixedly connected to the interior of both ends of the device housing (51), and springs (58) are fixedly connected to the sides of the fixed rings (56). A straight rod (510) is movably connected to the fixed rings (56), and a ball (57) for locking the cylinder (1) is fixedly connected to the straight rod (510). The spring (58) is fixed between the fixed rings (56) and the ball (57) so that the ball (57) can automatically pop out to lock the cylinder (1) and multiple multi-stage hydraulic rods (4). Each front end is provided with a groove (59) that matches the top ball (57) so that when the top ball (57) pops out, it locks multiple multi-stage hydraulic rods (4). The other end of the straight rod (510) is fixedly connected to a movable block (55), and the movable block (55) slides inside the equipment housing (51). Both sides of the equipment housing (51) are slidably connected to limit rods (52), and the movable block (55) is provided with a straight groove that matches the limit rod (52). The bottom end of the limit rod (52) is fixedly connected to an inclined groove (53) so that when the limit rod (52) moves, it drives the movable block (55) to slide through the inclined groove (53) to pull the top ball (57) to move.

2. The multi-stage adjustable hydraulic cylinder structure according to claim 1, characterized in that: The bottom of the cylinder (1) is fixedly connected to a connecting pipe (2) for connecting to an external device, so as to fix it to the external device by means of a pin.

3. The multi-stage adjustable hydraulic cylinder structure according to claim 1, characterized in that: The ends of the multi-stage hydraulic rods (4) are provided with annular grooves (6) that match the top ball (57), and rubber pads are fixedly connected to the inner wall of the annular grooves (6) to increase the friction between the top ball (57) and the annular grooves (6).

4. The multi-stage adjustable hydraulic cylinder structure according to claim 1, characterized in that: Limiting blocks (511) are fixedly connected to both sides of the movable block (55), and a movable groove matching the limiting block (511) is fixedly connected inside the device housing (51) so that the movable block (55) can slide inside the device housing (51).

5. The multi-stage adjustable hydraulic cylinder structure according to claim 1, characterized in that: The bottom of the inclined groove (53) is fixedly connected to a pad (54), and the pad (54) is larger than the cross-section of the limiting rod (52) so that the limiting rod (52) will not come out when it moves on the equipment housing (51).

6. The multi-stage adjustable hydraulic cylinder structure according to claim 1, characterized in that: The multiple self-locking mechanisms (5) correspond to multiple multi-stage hydraulic rods (4) that are proportionally reduced in size, and the multiple equipment housings (51) are all movably connected to multiple limit rods (52).

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