Long-stroke double-support hydraulic oil cylinder with protection structure

Abstract

The utility model discloses a long -stroke double support hydraulic oil cylinder with protection structure, the utility model relates to hydraulic mechanical technical field, this long -stroke double support hydraulic oil cylinder with protection structure, including, including support mechanism, the top surface of support mechanism is arranged with four mounting holes in annular array, the top of support mechanism is installed with cylinder body mechanism through fixed peg, the utility model discloses the double support design of support mechanism and guide rod, the long -stroke movement of output rod is restrained as the double control of bottom fixed support and top guide support, compared with the existing single support structure, effectively reduce the deflection of output rod in the stroke, reduce cylinder wear and seal failure risk, solve the problem of the unstable structure of traditional long -stroke oil cylinder due to single support.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic machinery technology, specifically a long-stroke double-support hydraulic cylinder with a protective structure. Background Technology

[0002] Long-stroke hydraulic cylinders are widely used in engineering machinery, mining equipment, and other fields. Their long stroke and large load characteristics place higher demands on structural stability and protection performance. An existing patent, CN214424814U, describes an ultra-long stroke piston anti-leakage sealing combination structure for ultra-large tonnage telescopic cylinders. The structure includes a front baffle tightly attached to the front side of the piston and a rear baffle tightly attached to the rear side of the piston. Support rings IV, V, and anti-fouling ring II are installed sequentially from front to back on the outer circumference of the front baffle. Y-ring I, support ring VI, OE Glyd ring, support ring III, and Y-ring II are installed sequentially from front to back on the outer circumference of the piston. Anti-fouling ring I, support ring I, and support ring II are installed sequentially from front to back on the outer circumference of the rear baffle. This utility model adopts a sealing combination of double Y-rings + Glyd rings + six support rings + double anti-pollution rings, which has good anti-leakage performance, can achieve guiding stability for ultra-long strokes, effectively reduce uneven distribution of bearing force, and solves the piston leakage problem and cylinder vibration and abnormal noise problem caused by high flow, high speed and heavy load operation of multi-section boom truck cranes and all-terrain cranes of 100 tons and above.

[0003] Regarding the aforementioned technologies, the inventors believe that the following defects exist: the single-support design is prone to piston rod deflection during long strokes, leading to problems such as cylinder wear and seal failure, and the protection capability is insufficient: the exposed part of the piston rod lacks effective protection and is susceptible to dust and moisture corrosion, affecting the service life of the hydraulic cylinder. Therefore, we propose a long-stroke double-support hydraulic cylinder with a protective structure to solve the above-mentioned problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a long-stroke double-support hydraulic cylinder with a protective structure. This solves the problems of single-support designs, which easily lead to piston rod deflection during long strokes, causing cylinder wear and seal failure, and insufficient protection: the exposed part of the piston rod lacks effective protection and is susceptible to dust and moisture corrosion, affecting the service life of the cylinder.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a long-stroke double-support hydraulic cylinder with a protective structure, including a support mechanism, wherein four mounting holes are arranged in a circular array on the top surface of the support mechanism, and a cylinder body mechanism is mounted on the top of the support mechanism by a fixing bolt;

[0006] An output rod is installed inside the cylinder mechanism. A top plate assembly is fixedly connected to the top surface of the output rod. A cover assembly is fixedly connected to the bottom surface of the top plate assembly. The cover assembly covers the outside of the output rod, and a guide groove is opened inside the support mechanism.

[0007] Preferably, the guide groove is used for the cover assembly to pass through, and a guide rod is fixedly connected to the bottom end surface of the top plate assembly, the guide rod being arranged longitudinally.

[0008] Preferably, the guide rod matches the guide groove opened in the support mechanism, and there are two guide rods in total. The two guide rods are fixedly connected to the left and right sides of the bottom end face of the top plate assembly in a linear array.

[0009] Preferably, a connecting component is fixedly connected to the top surface of both guide rods, and the connecting component passes through the top plate assembly upwards.

[0010] Preferably, the main body of the connecting component is a cylindrical structure, and a screw hole is provided inside the connecting component for connecting with external equipment, and a bracket mechanism is fixedly connected to the outer side of the support mechanism.

[0011] Preferably, the support mechanism is provided in two places, and the two support mechanisms are fixedly connected to the front and rear sides of the support mechanism in opposite directions.

[0012] Preferably, the outer side of the support mechanism is fixedly connected with a connector. There are two connectors in total. The two connectors are fixedly connected to the left and right sides of the support mechanism in opposite directions. The outer side of the two connectors is also fixedly connected with a splicing plate. The splicing plate has a positioning hole inside. The inner side of the splicing plate and the connector is also fixedly connected with an inclined reinforcing plate.

[0013] Beneficial effects

[0014] This invention provides a long-stroke double-support hydraulic cylinder with a protective structure. Compared with the prior art, it has the following advantages:

[0015] This long-stroke double-support hydraulic cylinder with a protective structure uses a double-support design of support mechanism and guide rod to constrain the long-stroke movement of the output rod to dual control of bottom fixed support and top guide support. Compared with the existing single-support structure, it effectively reduces the deflection of the output rod during the stroke, reduces cylinder wear and the risk of seal failure, and solves the structural instability problem caused by single support in traditional long-stroke cylinders.

[0016] This long-stroke, double-support hydraulic cylinder with a protective structure forms a dynamic protective barrier as the cover assembly moves with the output rod, preventing external contaminants from contacting the output rod and improving corrosion resistance. The cooperation between the guide rod and the guide groove not only enhances motion guidance but also enables rapid installation with external equipment through the connecting components. The support mechanism, through the combination of connectors, splicing plates, and reinforcing plates, facilitates splicing with other equipment and enhances structural strength through inclined reinforcing plates, adapting to the installation and load requirements of complex working conditions. It overcomes the technical bottlenecks of insufficient protection and poor installation flexibility of existing cylinders. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the disassembled front side view of the double-support hydraulic cylinder of this utility model;

[0018] Figure 2 This is a schematic diagram of the combined structure of the double-support hydraulic cylinder of this utility model;

[0019] Figure 3 This is a front view schematic diagram of the double-support hydraulic cylinder of this utility model;

[0020] Figure 4 This is a top view of the structure of the double-support hydraulic cylinder of this utility model;

[0021] Figure 5 This is a schematic diagram of the combined structure of the support mechanism and guide groove of the double-support hydraulic cylinder of this utility model;

[0022] Figure 6 This is a left-side structural schematic diagram of the double-support hydraulic cylinder of this utility model.

[0023] In the diagram: 1. Support mechanism; 101. Guide groove; 1011. Mounting hole; 1012. Guide groove; 2. Bracket mechanism; 201. Connector; 2011. Splicing plate; 2012. Positioning hole; 2013. Reinforcing plate; 3. Cylinder mechanism; 301. Output rod; 3011. Top plate assembly; 3012. Guide rod; 3013. Connecting assembly; 3014. Cover assembly. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0025] Please see Figures 1-6This utility model provides a technical solution: a long-stroke double-support hydraulic cylinder with a protective structure, including a support mechanism 1. The top surface of the support mechanism 1 has four mounting holes 1011 arranged in a ring array. The top of the support mechanism 1 is fitted with a cylinder body mechanism 3 by a fixing bolt.

[0026] An output rod 301 is installed inside the cylinder mechanism 3. A top plate assembly 3011 is fixedly connected to the top surface of the output rod 301. A cover assembly 3014 is fixedly connected to the bottom surface of the top plate assembly 3011. The cover assembly 3014 covers the outside of the output rod 301. A guide groove 1012 is provided inside the support mechanism 1.

[0027] The cylinder mechanism 3 is mounted on the top of the support mechanism 1 through the mounting hole 1011 with a fixing bolt. The top of the output rod 301 inside the cylinder mechanism 3 is connected to the top plate assembly 3011, and the cover assembly 3014 at its bottom passes through the guide groove 1012 of the support mechanism 1. Through the fixed connection between the support mechanism 1 and the cylinder mechanism 3, and the protection of the outer side of the output rod 301 by the cover assembly 3014, the exposed part of the output rod 301 can be reduced from dust and moisture erosion, thus improving the protection performance.

[0028] See Figures 1-2 The guide groove 1012 is used for the cover assembly 3014 to pass through. A guide rod 3012 is fixedly connected to the bottom end surface of the top plate assembly 3011. The guide rod 3012 is arranged longitudinally.

[0029] The cover assembly 3014 passes through the guide groove 1012. The longitudinal guide rod 3012 at the bottom of the top plate assembly 3011 matches the guide groove 101 of the support mechanism 1. Through the cooperation of the guide rod 3012 and the guide groove 101, the movement direction of the output rod 301 can be guided, enhancing the stability of the output rod 301 during long strokes and reducing deflection.

[0030] See Figures 5-6 The guide rod 3012 matches the guide groove 101 opened in the support mechanism 1, and there are two guide rods 3012 in total. The two guide rods 3012 are fixedly connected to the left and right sides of the bottom end face of the top plate assembly 3011 in a straight array.

[0031] Two guide rods 3012 are fixed in a linear array on the left and right sides of the bottom of the top plate assembly 3011 and matched with the guide groove 101. The symmetrically arranged guide rods 3012 further improve the coaxiality of the output rod 301 during long stroke, balance the force, and reduce the risk of cylinder wear.

[0032] See Figures 3-4 A connecting component 3013 is fixedly connected to the top surface of both guide rods 3012, and the connecting component 3013 passes through the top plate component 3011 upwards;

[0033] The connecting component 3013 at the top of the guide rod 3012 passes upward through the top plate assembly 3011. The screw hole of the connecting component 3013 is used to connect external devices. This structure enables the output rod 301 to be quickly connected to external devices. At the same time, the guide rod 3012 can help transmit lateral loads and improve connection stability.

[0034] See Figures 1-2 The main body of the connecting component 3013 is a cylindrical structure, and a screw hole is provided inside the connecting component 3013 for connecting with external equipment. A bracket mechanism 2 is fixedly connected to the outer side of the support mechanism 1.

[0035] The connecting component 3013 is a cylindrical structure with screw holes inside. Two opposing bracket mechanisms 2 are fixed on the outside of the support mechanism 1. The bracket mechanisms 2 can enhance the structural strength of the support mechanism 1. With the screw hole connection of the connecting component 3013, the hydraulic cylinder can withstand a larger load and is suitable for heavy working conditions.

[0036] See Figures 5-6 There are two support mechanisms 2, which are fixedly connected to the front and rear sides of the support mechanism 1 in opposite directions.

[0037] By fixing the two support mechanisms 2 to the front and rear sides of the support mechanism 1 in opposite directions, a double support structure is formed through the symmetrical support mechanisms 2, which constrains the long stroke of the output rod 301 to be supported at both the front and rear ends. Compared with the single support design, this reduces the skewness of the output rod 301 and improves the overall structural stability.

[0038] See Figures 1-2 A connector 201 is fixedly connected to the outside of the support mechanism 1. There are two connectors 201. The two connectors 201 are fixedly connected to the left and right sides of the support mechanism 1 in opposite directions. A splicing plate 2011 is also fixedly connected to the outside of the two connectors 201. The splicing plate 2011 has a positioning hole 2012 inside. An inclined reinforcing plate 2013 is also fixedly connected to the inside of the splicing plate 2011 and the connector 201.

[0039] The splicing plate 2011 is connected to the outside of the support mechanism 1 via the connector 201. The positioning hole 2012 of the splicing plate 2011 and the reinforcing plate 2013 enhance the connection strength. The combination of the connector 201, the splicing plate 2011 and the reinforcing plate 2013 facilitates the splicing and installation of the support mechanism 1 with other equipment. At the same time, the inclined reinforcing plate 2013 improves the torsional resistance of the structure and adapts to complex installation environments.

[0040] During operation, the support mechanism 1 serves as the basic component. Through four mounting holes 1011 arranged in a ring at the top, the cylinder mechanism 3 is securely mounted on the top using fixing bolts, forming the bottom support of the hydraulic cylinder. The output rod 301 inside the cylinder mechanism 3 can reciprocate along the axial direction. The top plate assembly 3011 fixedly connected to its top moves synchronously with the output rod 301. The cover assembly 3014 connected to the bottom of the top plate assembly 3011 has a cylindrical structure, which is sleeved on the outside of the output rod 301 and passes through the guide groove 1012 inside the support mechanism 1, forming a dynamic protective barrier when the output rod 301 moves.

[0041] The top plate assembly 3011 has longitudinally arranged guide rods 3012 fixedly connected to the left and right sides of its bottom end. The two guide rods 3012 are respectively embedded in the guide grooves 101 on the left and right sides of the support mechanism 1. When the output rod 301 performs a long stroke, the guide rods 3012 slide linearly in the guide grooves 101 to form a top support point. Together with the bottom support of the support mechanism 1, they form a double support structure. This structure constrains the radial displacement of the output rod 301 through the two support points at the top and bottom, ensuring that it maintains axial stability during reciprocating motion and avoiding the skew phenomenon caused by a single support.

[0042] When the cover assembly 3014 passes through the guide groove 1012 along with the output rod 301, its inner wall is in close contact with the surface of the output rod 301 (non-contact design), forming a physical barrier that effectively prevents external pollutants such as dust and water vapor from directly contacting the exposed part of the output rod 301, reducing the risk of corrosion. The guide rod 3012 not only serves as a top support, but its top connecting assembly 3013 passes upward through the top plate assembly 3011 and is bolted to external equipment (such as a robotic arm, workbench, etc.) through internal screw holes to achieve power transmission. In the connected state, the cooperation between the guide rod 3012 and the guide groove 101 can help withstand the lateral load applied by the external equipment, further enhancing the linearity of the movement of the output rod 301 and reducing cylinder wear caused by lateral forces.

[0043] Connecting parts 201 are fixedly connected to the left and right sides of the outer side of the support mechanism 1. A splicing plate 2011 extends from the outer side of the connecting parts 201. The splicing plate 2011 has positioning holes 2012, which can be fixed to other mechanical structures by bolts to realize the quick splicing of the oil cylinder and the whole machine. An inclined reinforcing plate 2013 is set between the connecting parts 201 and the splicing plate 2011. The reinforcing plate 2013 is welded to the inner side of the two at a 45° angle to form a triangular support structure, which effectively improves the torsional stiffness of the support mechanism 1 and avoids structural deformation caused by installation stress or load fluctuation. The bracket mechanism 2, which is set in opposite directions, is fixed to the front and rear sides of the support mechanism 1 to further enhance the stability of the overall frame, so that the oil cylinder can withstand a large axial load without shaking under long stroke conditions.

[0044] In summary, this device, by incorporating the output rod 301, can achieve stable power output.

[0045] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

Claims

1. A long-stroke double-support hydraulic oil cylinder with a protective structure, comprising a support mechanism (1), four mounting holes (1011) are arranged in an annular array on the top end face of the support mechanism (1), characterized in that: The top of the support mechanism (1) is fitted with a cylinder mechanism (3) via a fixing bolt. The cylinder mechanism (3) has an output rod (301) installed inside. A top plate assembly (3011) is fixedly connected to the top surface of the output rod (301). A cover assembly (3014) is fixedly connected to the bottom surface of the top plate assembly (3011). The cover assembly (3014) covers the outside of the output rod (301), and a guide groove (1012) is opened inside the support mechanism (1).

2. The long-stroke double support hydraulic oil cylinder with a protection structure according to claim 1, characterized in that: The guide groove (1012) is used for the cover assembly (3014) to pass through. A guide rod (3012) is fixedly connected to the bottom end surface of the top plate assembly (3011). The guide rod (3012) is arranged longitudinally.

3. The long stroke double support hydraulic cylinder with a protection structure according to claim 2, characterized in that: The guide rod (3012) matches the guide groove (101) opened in the support mechanism (1), and there are two guide rods (3012). The two guide rods (3012) are fixedly connected in a straight line array to the left and right sides of the bottom end face of the top plate assembly (3011).

4. The long stroke double support hydraulic oil cylinder with a protection structure according to claim 3, characterized in that: A connecting component (3013) is fixedly connected to the top surface of both guide rods (3012), and the connecting component (3013) passes through the top plate component (3011) upward.

5. A long-stroke double-support hydraulic cylinder with a protective structure according to claim 4, characterized in that: The main body of the connecting component (3013) is a cylindrical structure, and the connecting component (3013) has a screw hole inside, which is used to connect with external equipment, and a bracket mechanism (2) is fixedly connected to the outer side of the support mechanism (1).

6. The long stroke double support hydraulic oil cylinder with a protection structure according to claim 5, characterized in that: The support mechanism (2) has two locations, which are fixedly connected to the front and rear sides of the support mechanism (1) in opposite directions.

7. A long-stroke double-support hydraulic cylinder with a protective structure according to claim 1, characterized in that: The support mechanism (1) is fixedly connected to a connector (201) on its outer side. There are two connectors (201). The two connectors (201) are fixedly connected to the left and right sides of the support mechanism (1) in opposite directions. The two connectors (201) are also fixedly connected to a splicing plate (2011) on their outer side. The splicing plate (2011) has a positioning hole (2012) inside. The splicing plate (2011) and the inner side of the connector (201) are also fixedly connected to an inclined reinforcing plate (2013).

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