Multi-stage supercharged hydraulic oil cylinder

Abstract

The utility model relates to the technical field of hydraulic oil cylinders, and discloses a multi-stage supercharged hydraulic oil cylinder which comprises an oil cylinder body, an inlet hole is formed in the arc surface of the oil cylinder body, a connecting disc is fixedly connected to one end of the oil cylinder body, four flange holes are formed in the surface of the connecting disc, and a dustproof device is arranged on the arc surface of the connecting disc and comprises four L-shaped hooks. The four L-shaped hooks are fixedly connected with the arc surface of the connecting disc, the arc surface of the oil cylinder body is fixedly connected with four mounting rods, and the arc surfaces of the four L-shaped hooks are slidably connected with dustproof cloth. According to the multi-stage supercharged hydraulic oil cylinder, the effect of following and shielding the extending part when the oil cylinder body works is achieved, and the situation that when the oil cylinder body works, the oil cylinder body extends step by step according to the working requirement, the extending part is contaminated by external dust and impurities, and consequently the interior of the oil cylinder body is contaminated or clamped is avoided; therefore, the service life of the oil cylinder body is shortened, and the protective property of the device is improved.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, and in particular to a multi-stage booster hydraulic cylinder. Background Technology

[0002] In the field of hydraulic transmission, multi-stage booster hydraulic cylinders are widely used in heavy equipment such as construction machinery (e.g., cranes, excavators), metallurgical equipment, and marine machinery due to their large stroke and high output force. Their core principle is to achieve long-distance drive through the telescopic linkage of multiple cylinders. However, under complex working conditions, there are significant technical shortcomings in the protection and maintenance of these cylinders during downtime.

[0003] Regarding the aforementioned and existing related technologies, the inventors believe that the following defects often exist: During operation, the telescopic parts of traditional multi-stage hydraulic cylinders (such as the piston rod and the connections between each cylinder stage) are directly exposed to the external environment, making them susceptible to contamination by dust, sand, moisture, and other impurities. These impurities can enter the internal sealing surface as the cylinder extends and retracts, exacerbating wear on the piston and cylinder (statistics show that approximately 60% of hydraulic cylinder failures originate from seal failure caused by impurity wear), leading to problems such as oil leakage and pressure drop. In severe cases, it can even cause the cylinder to jam, resulting in equipment shutdown. Summary of the Invention

[0004] The technical problem to be solved by this utility model is that in the prior art, when the cylinder body is working, it gradually extends with the work requirements. The extended part is contaminated by external dust and impurities, which leads to the internal contamination or jamming of the cylinder body, thereby reducing the service life of the cylinder body. To address this, we propose a multi-stage booster hydraulic cylinder.

[0005] To achieve the above objectives, this application adopts the following technical solution: a multi-stage booster hydraulic cylinder, including a cylinder body, an inlet hole installed on the arc surface of the cylinder body, a connecting plate fixedly connected to one end of the cylinder body, four flange holes opened on the surface of the connecting plate, a dustproof device provided on the arc surface of the connecting plate, the dustproof device including four L-shaped hooks, all four L-shaped hooks being fixedly connected to the arc surface of the connecting plate, four mounting rods fixedly connected to the arc surface of the cylinder body, a dustproof cloth slidably connected to the arc surface of the four L-shaped hooks, the dustproof cloth being slidably connected to the arc surface of the four mounting rods, and four winding ropes fixedly connected to the arc surface of the dustproof cloth.

[0006] Preferably, the arc surface of the dustproof cloth is fixedly connected with four rubber rings, and the four rubber rings are slidably connected to four L-shaped hooks respectively.

[0007] Preferably, the arc surface of the mounting rod is provided with a winding groove, and a stabilizing plate is fixedly connected to one end of the mounting rod.

[0008] Preferably, one end of the winding rope is fixedly connected to a rubber sleeve, the size of which is adapted to the size of the mounting rod.

[0009] Preferably, the arc surface of the dustproof cloth has several folds, and the several folds are evenly distributed in a linear array on the arc surface of the dustproof cloth.

[0010] Preferably, the surfaces of the four connecting disc flange holes are provided with auxiliary devices, the auxiliary devices including four circular plugs, the four circular plugs are slidably connected to the surfaces of the four connecting disc flange holes respectively, a protective plate is fixedly connected to one end of the four circular plugs, a connecting plate is fixedly connected to one side of the protective plate, a support plate is slidably inserted in the connecting plate, a sealing plug is fixedly connected to one side of the support plate, and the arc surface of the sealing plug is slidably connected to the inlet hole.

[0011] Preferably, a square plate is fixedly connected to the surface of the connecting plate, and a rod is slidably inserted into the square plate. A first spring is sleeved on the arc surface of the rod, and the two ends of the first spring are fixedly connected to the rod and the square plate, respectively. A number of insertion holes are opened on the surface of the support plate, and the arc surface of the rod is slidably connected to the insertion holes of the support plate.

[0012] The technical effects and advantages of this utility model are as follows:

[0013] 1. In this utility model, by setting a dustproof device, the extension part of the cylinder body during operation is shielded, which avoids the cylinder body from being contaminated by external dust and impurities as it gradually extends with the work requirements, causing the inside of the cylinder body to be contaminated or jammed, thereby reducing the service life of the cylinder body and improving the protective performance of the device.

[0014] 2. In this utility model, by setting an auxiliary device, the dustproof effect of the idle cylinder body components is achieved, which avoids the situation where a large amount of dust and impurities enter the inlet hole and the flange hole of the connecting plate when the cylinder body is idle, thus making it difficult for the connecting plate to connect normally or the inlet hole to be blocked and difficult to drive, thereby improving the practicality of the device. Attached Figure Description

[0015] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts:

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the dustproof device in this utility model;

[0018] Figure 3This is a partial structural schematic diagram of the dustproof device in this utility model;

[0019] Figure 4 This is a partial structural schematic diagram of the dustproof device in this utility model;

[0020] Figure 5 This is a schematic diagram of the auxiliary device in this utility model;

[0021] Figure 6 This is a partial structural diagram of the auxiliary device in this utility model.

[0022] Legend: 1. Cylinder body; 2. Inlet hole; 3. Connecting plate; 4. Dustproof device; 41. L-shaped hook; 42. Mounting rod; 43. Dustproof cloth; 44. Winding rope; 45. Rubber ring; 46. Winding groove; 47. Stabilizing plate; 48. Rubber sleeve; 49. Folding pattern; 5. Auxiliary device; 51. Circular plug; 52. Protective plate; 53. Connecting plate; 54. Support plate; 55. Sealing plug; 56. Square plate; 57. Insert rod; 58. First spring. Detailed Implementation

[0023] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementation methods without changing the essential spirit of this utility model. Therefore, the following specific embodiments and accompanying drawings are merely exemplary descriptions of the technical solution of this utility model, and should not be regarded as the entirety of this utility model or as a limitation or restriction on the technical solution of this utility model.

[0024] Reference Figure 1 and Figure 2 As shown, this utility model provides a technical solution: a multi-stage booster hydraulic cylinder, including a cylinder body 1. An inlet hole 2 is installed on the arc surface of the cylinder body 1. A connecting plate 3 is fixedly connected to one end of the cylinder body 1. Four flange holes are opened on the surface of the connecting plate 3. A dustproof device 4 is provided on the arc surface of the connecting plate 3. By setting the dustproof device 4, the extended part of the cylinder body 1 during operation is shielded, preventing the cylinder body 1 from being contaminated by external dust and impurities as it gradually extends according to work requirements, thus avoiding internal contamination or jamming and reducing the service life of the cylinder body 1. This improves the protective performance of the device. An auxiliary device 5 is provided on the surface of the four flange holes of the connecting plate 3. By setting the auxiliary device 5, dustproofing is achieved for the idle cylinder body 1 components, preventing a large amount of dust and impurities from entering the inlet hole 2 and the flange holes of the connecting plate 3 when the cylinder body 1 is idle, thus preventing the connecting plate 3 from being difficult to connect properly or the inlet hole 2 from being blocked and difficult to drive, improving the practicality of the device.

[0025] The specific setup and function of its dustproof device 4 and auxiliary device 5 will be explained below.

[0026] Reference Figure 2 , Figure 3 and Figure 4 As shown in this embodiment: the dustproof device 4 includes four L-shaped hooks 41, all four L-shaped hooks 41 are fixedly connected to the arc surface of the connecting plate 3, four mounting rods 42 are fixedly connected to the arc surface of the cylinder body 1, dustproof cloth 43 is slidably connected to the arc surface of the four L-shaped hooks 41, the dustproof cloth 43 is slidably connected to the arc surface of the four mounting rods 42, four winding ropes 44 are fixedly connected to the arc surface of the dustproof cloth 43, and four rubber rings 45 are fixedly connected to the arc surface of the dustproof cloth 43. The four rubber rings 45 are slidably connected to the four L-shaped hooks 41 respectively. The rubber rings 45 achieve the effect of reducing the friction between the dustproof cloth 43 and the L-shaped hooks 41, avoiding the situation where the L-shaped hooks 41 and the dustproof cloth 43 rub together violently, thereby causing damage to the dustproof cloth 43. The arc surface of the mounting rods 42 is provided with winding grooves 4. 6. A stabilizing plate 47 is fixedly connected to one end of the mounting rod 42. The cooperation between the winding groove 46 and the stabilizing plate 47 can increase the stability when limiting the dustproof cloth 43. A rubber sleeve 48 is fixedly connected to one end of the winding rope 44. The size of the rubber sleeve 48 is adapted to the size of the mounting rod 42, which achieves the effect of wrapping the winding rope 44, making the winding rope 44 more stable on the arc surface of the mounting rod 42, and avoiding the situation where the winding rope 44 becomes loose due to external force. The arc surface of the dustproof cloth 43 is provided with several fold lines 49. Several fold lines 49 are evenly distributed in a linear array on the arc surface of the dustproof cloth 43. The fold lines 49 automatically fold or unfold with the lifting and lowering of the dustproof cloth 43 to prevent the dustproof cloth 43 from being pinched by the cylinder body 1. The linear and even distribution makes the folding and unfolding of the dustproof cloth 43 more regular and stable.

[0027] Reference Figure 5 and Figure 6 As shown, specifically, the auxiliary device 5 includes four circular plugs 51, which are slidably connected to the surfaces of the flange holes of the four connecting plates 3. One end of each circular plug 51 is fixedly connected to a protective plate 52, and one side of the protective plate 52 is fixedly connected to a connecting plate 53. A support plate 54 is slidably inserted into the connecting plate 53, and one side of the support plate 54 is fixedly connected to a sealing plug 55. The arc surface of the sealing plug 55 is slidably connected to the inlet hole 2. A square plate 56 is fixedly connected to the surface of the connecting plate 53, and a rod 57 is slidably inserted into the square plate 56. A first spring 58 is sleeved on the arc surface of the rod 57, and both ends of the first spring 58 are fixedly connected to the rod 57 and the square plate 56, respectively. Several insertion holes are opened on the surface of the support plate 54, and the arc surface of the rod 57 is slidably connected to the insertion holes of the support plate 54, thereby achieving the effect of fixing and limiting the circular plugs 51 and the sealing plugs 55, so as to increase the stability of the inlet hole 2 and the flange hole of the connecting plate 3 when dustproofing.

[0028] Working principle: The dustproof cloth 43 is installed by the L-shaped hook 41 (fixed to the connecting plate 3) and the mounting rod 42 (fixed to the cylinder body 1). The folds 49 on its arc surface can automatically fold or unfold with the lifting and lowering of the connecting plate 3, avoiding the dustproof cloth 43 being pinched by the cylinder body 1. The linear and uniform distribution ensures that the folding and unfolding process is regular and stable. When it is necessary to fix the position of the dustproof cloth 43, the winding rope 44 on the dustproof cloth 43 is wound into the winding groove 46 of the mounting rod 42, and then the rubber sleeve 48 is used to tighten the mounting rod 42. The stabilizing plate 47 is used to enhance the winding stability and prevent the winding rope 44 from loosening due to external force. The rubber ring 45 on the L-shaped hook 41 reduces the friction with the dustproof cloth 43 and avoids damage to the dustproof cloth 43, thereby continuously protecting the cylinder body 1 from dust intrusion.

[0029] The circular plug 51 is inserted into the flange hole of the connecting plate 3, and the sealing plug 55 is inserted into the inlet hole 2. The two are connected by the protective plate 52 and the connecting plate 53. After the support plate 54 (slidably connected to the connecting plate 53) is pushed to adjust the sealing position, the first spring 58 pushes the insertion rod 57 (passing through the square plate 56) into the insertion hole of the support plate 54 to achieve the fixed limit of the circular plug 51 and the sealing plug 55. This structure ensures the sealing stability of the inlet hole 2 and the flange hole when idle, further improves the overall dustproof effect, and forms multiple protections with the device to reduce the impact of dust on the cylinder components.

[0030] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A multi-stage booster hydraulic cylinder, characterized in that, The device includes a hydraulic cylinder body, with an inlet hole installed on the arc surface of the hydraulic cylinder body. A connecting plate is fixedly connected to one end of the hydraulic cylinder body. Four flange holes are opened on the surface of the connecting plate. A dustproof device is provided on the arc surface of the connecting plate. The dustproof device includes four L-shaped hooks, all of which are fixedly connected to the arc surface of the connecting plate. Four mounting rods are fixedly connected to the arc surface of the hydraulic cylinder body. A dustproof cloth is slidably connected to the arc surface of the four L-shaped hooks. The dustproof cloth is slidably connected to the arc surface of the four mounting rods. Four winding ropes are fixedly connected to the arc surface of the dustproof cloth.

2. The multi-stage booster hydraulic cylinder according to claim 1, characterized in that: The arc surface of the dustproof cloth is fixedly connected to four rubber rings, and the four rubber rings are slidably connected to four L-shaped hooks respectively.

3. The multi-stage booster hydraulic cylinder according to claim 1, characterized in that: The mounting rod has a winding groove on its arc surface, and a stabilizing plate is fixedly connected to one end of the mounting rod.

4. The multi-stage booster hydraulic cylinder according to claim 1, characterized in that: One end of the winding rope is fixedly connected to a rubber sleeve, the size of which is adapted to the size of the mounting rod.

5. The multi-stage booster hydraulic cylinder according to claim 1, characterized in that: The arc surface of the dustproof cloth is provided with a number of folds, and the number of folds are evenly distributed in a linear array on the arc surface of the dustproof cloth.

6. The multi-stage booster hydraulic cylinder according to claim 1, characterized in that: The surfaces of the four connecting disc flange holes are provided with auxiliary devices, each including four circular plugs. The four circular plugs are slidably connected to the surfaces of the four connecting disc flange holes. A protective plate is fixedly connected to one end of each of the four circular plugs. A connecting plate is fixedly connected to one side of the protective plate. A support plate is slidably inserted into the connecting plate. A sealing plug is fixedly connected to one side of the support plate. The arc surface of the sealing plug is slidably connected to the inlet hole.

7. The multi-stage booster hydraulic cylinder according to claim 6, characterized in that: A square plate is fixedly connected to the surface of the connecting plate, and a rod is slidably inserted into the square plate. A first spring is sleeved on the arc surface of the rod, and the two ends of the first spring are fixedly connected to the rod and the square plate, respectively. A number of insertion holes are opened on the surface of the support plate, and the arc surface of the rod is slidably connected to the insertion holes of the support plate.

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