A new type of hydraulic cylinder with increased force-bearing area
By optimizing the structure of the outer and inner cylinders of the hydraulic cylinder and increasing the force-bearing area, the problem of insufficient output force of the hydraulic cylinder without increasing pressure and size was solved, achieving high efficiency, energy saving and cost reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANLONG BEIMAN SPECIAL STEEL CO LTD
- Filing Date
- 2025-07-22
- Publication Date
- 2026-06-30
AI Technical Summary
Existing hydraulic cylinders cannot achieve large output forces without increasing system pressure and size, resulting in high power consumption and increased manufacturing costs.
A novel hydraulic cylinder with increased force-bearing area is designed. It adopts a combined structure of outer and inner cylinders. By optimizing the force-bearing area of the piston rod through the exhaust ports of the inner and outer cylinders and components such as support rings and O-rings, a larger actuation force can be achieved.
Increase output power under lower system pressure, reduce power loss, lower manufacturing costs, and adapt to the needs of compact equipment.
Smart Images
Figure CN224432979U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of industrial hydraulic equipment technology, and in particular relates to a new type of hydraulic cylinder with increased force-bearing area. Background Technology
[0002] Hydraulic equipment is used in many industries, and hydraulic cylinders, also known as oil cylinders, serve as the actuators of these machines. Their function is to output a certain force, converting hydraulic energy into linear reciprocating mechanical energy to complete various actions of the machinery. The magnitude of the hydraulic cylinder's actuating force is determined by its external dimensions and the pressure exerted on it by the hydraulic system. Under constant pressure, the maximum output force of a typical hydraulic cylinder is... Where F is the output force of the hydraulic cylinder, in N; and S is the force-bearing area of the hydraulic cylinder, in cm². 2 D represents the maximum diameter of the hydraulic cylinder, in cm; P represents the pressure of the hydraulic system, in MPa. That is, under constant pressure, the maximum output force depends on the piston diameter D; the larger D is, the greater the output force. To achieve a greater output force, the system pressure P needs to be increased, or the piston diameter D of the hydraulic cylinder needs to be increased. However, in practical applications, increasing the system pressure undoubtedly requires increasing power, which increases operating costs; while increasing the piston diameter D correspondingly increases the size of the equipment, which increases manufacturing costs or creates space constraints in the design.
[0003] In practical applications, hydraulic cylinders often need to output a large actuation force. However, from the perspective of energy saving and controlling design and manufacturing costs, it is necessary to reduce the pressure of the hydraulic system to reduce power consumption, or to control the equipment manufacturing cost.
[0004] In summary, there is an urgent need to design a hydraulic cylinder that can achieve a large output force with a small pressure, thereby increasing the output force while reducing the system pressure and ensuring a small external size, thus reducing power consumption and manufacturing costs. Summary of the Invention
[0005] A brief overview of the present invention is given below to provide a basic understanding of certain aspects thereof. It should be understood that this overview is not an exhaustive summary of the present invention. It is not intended to identify key or essential parts of the present invention, nor is it intended to limit the scope of the present invention. Its purpose is merely to present certain concepts in a simplified form as a prelude to the more detailed description that follows.
[0006] Therefore, in order to increase the output force of the hydraulic cylinder without changing its external dimensions and hydraulic cylinder system pressure, this utility model provides a new type of hydraulic cylinder with an increased force-bearing area.
[0007] Solution: A novel hydraulic cylinder with increased force-bearing area, comprising an outer cylinder barrel, an inner cylinder barrel, a piston rod, and an end cap;
[0008] The outer cylinder has a concave shape, while the inner cylinder has a convex shape. The inner cylinder can be movably installed inside the outer cylinder.
[0009] The end cap includes a first end cap and a second end cap. The first end cap is provided on the left side of the inner cylinder cavity, and the second end cap is provided between the right outer wall of the inner cylinder and the outer cylinder. An exhaust chamber is formed between the outer cylinder, the inner cylinder and the second end cap. A first exhaust hole is provided on the inner cylinder to connect the inner cylinder cavity with the exhaust chamber. A second exhaust hole is provided on the second end cap to exhaust the gas from the exhaust chamber.
[0010] The piston rod passes through the outer cylinder and the first end cover in sequence and then enters the inner cavity of the inner cylinder. The piston rod is provided with a channel.
[0011] Furthermore, a retaining ring is provided at the oil inlet of the outer cylinder.
[0012] Furthermore, a first support ring, a second support ring, a third support ring, and a fourth support ring are respectively provided between the inner cylinder step and the outer cylinder, between the second end cover and the inner cylinder, between the piston rod and the inner cylinder, and between the piston rod and the first end cover.
[0013] Furthermore, a first O-ring, a second O-ring, and a third O-ring are respectively provided between the first end cover and the inner cylinder, between the second end cover and the outer cylinder, and between the outer cylinder and the piston rod. A first sealing ring and a third sealing ring are respectively provided on the right side of the first support ring and the fourth support ring, and a second sealing ring is provided on the left side of the third support ring.
[0014] Furthermore, a dustproof ring is provided between the inner cylinder and the second end cover.
[0015] The present invention has the following advantages over the prior art:
[0016] 1. This utility model breaks through the limitations of traditional hydraulic cylinders that rely on "high pressure" or "large size" to increase output force. Through optimized design, it can generate a large actuation force under lower system pressure, meeting the needs of heavy-duty working conditions.
[0017] 2. This utility model eliminates the need to increase the hydraulic system pressure, reducing power loss caused by high-pressure operation and lowering equipment operating costs;
[0018] 3. This utility model avoids the increase in equipment size caused by increasing the piston diameter, thus saving material and processing costs; at the same time, the small size design of this utility model device facilitates integration, reduces the difficulty of space layout, and adapts to the needs of compact equipment. Attached Figure Description
[0019] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:
[0020] Figure 1 This is a schematic diagram of a new type of hydraulic cylinder with an increased force-bearing area.
[0021] Figure 2 This is a schematic diagram of the inner cylinder.
[0022] Figure 3 This is a schematic diagram of the outer cylinder.
[0023] Figure 4 This is a schematic diagram of the piston rod structure;
[0024] Figure 5 This is a schematic diagram of the hydraulic cylinder during operation, where the red part represents the pressurized oil.
[0025] In the diagram: 1-Outer cylinder, 2-Inner cylinder, 3-Piston rod, 4-First end cap, 6-Second end cap, 7-First O-ring, 8-Second O-ring, 9-Third O-ring, 10-First support ring, 11-Second support ring, 12-Third support ring, 13-Fourth support ring, 14-First sealing ring, 15-Second sealing ring, 16-Third sealing ring, 17-Dustproof ring, 18-First exhaust port, 19-Second exhaust port, 20-Retaining ring. Detailed Implementation
[0026] To make the technical solutions and advantages of the embodiments of this utility model clearer, the exemplary embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this utility model can be combined with each other.
[0027] Example 1, Reference Figure 1-4 This embodiment describes a novel hydraulic cylinder with an increased force-bearing area, comprising an outer cylinder 1, an inner cylinder 2, a piston rod 3, and an end cap;
[0028] The outer cylinder 1 has a concave shape, and the inner cylinder 2 has a convex shape. The inner cylinder 2 is movably installed inside the outer cylinder 1.
[0029] The end cap includes a first end cap 4 and a second end cap 6. The first end cap 4 is provided on the left side of the inner cavity of the inner cylinder 2, and the second end cap 6 is provided between the right outer wall of the inner cylinder 2 and the outer cylinder 1. An exhaust chamber is formed between the outer cylinder 1, the inner cylinder 2 and the second end cap 6. A first exhaust hole 18 is provided on the inner cylinder 2 to connect the inner cavity of the inner cylinder 2 with the exhaust chamber. A second exhaust hole 19 is provided on the second end cap 6 to exhaust the gas from the exhaust chamber.
[0030] The piston rod 3 passes through the outer cylinder 1 and the first end cover 4 in sequence and then enters the inner cavity of the inner cylinder 2. The piston rod 3 is provided with a channel.
[0031] Furthermore, a retaining ring 20 is provided at the oil inlet of the outer cylinder 1.
[0032] Furthermore, a first support ring 10, a second support ring 11, a third support ring 12, and a fourth support ring 13 are respectively provided between the inner cylinder 2 step and the outer cylinder 1, between the second end cover 6 and the inner cylinder 2, between the piston rod 3 and the inner cylinder 2, and between the piston rod 3 and the first end cover 4.
[0033] Furthermore, a first O-ring 7, a second O-ring 8, and a third O-ring 9 are respectively provided between the first end cap 4 and the inner cylinder 2, between the second end cap 6 and the outer cylinder 1, and between the outer cylinder 1 and the piston rod 3. A first sealing ring 14 and a third sealing ring 16 are respectively provided on the right side of the first support ring 10 and the fourth support ring 13, and a second sealing ring 15 is provided on the left side of the third support ring 12.
[0034] Furthermore, a dustproof ring 17 is provided between the inner cylinder 2 and the second end cover 6.
[0035] Furthermore, the arrow indicates the direction of oil inlet.
[0036] Example 2, Reference Figure 5 This embodiment describes the use of a novel hydraulic cylinder with an increased force-bearing area. When pressurized oil enters the interior of the outer cylinder 1 and the inner cylinder 2 through the channel on the piston rod 3, the pressurized oil acts on the inner and outer force-bearing surfaces of the inner cylinder 2. The combined force of the inner and outer force-bearing surfaces pushes the inner cylinder 2 to move to the right end to achieve the required stroke.
[0037] In this utility model device ,in The inner diameter of the outer cylinder 1 is... The inner diameter of cylinder 2 is [missing information]. The area of the outer cylinder 1 that bears the force is... This represents the force-bearing area of the inner cylinder 2;
[0038] Furthermore, the aforementioned The maximum size can reach 75%. .
[0039] In this invention, without changing the external dimensions of the outer cylinder 1, the inner cylinder 2 and the piston rod 3 move simultaneously under the action of pressurized oil, thereby increasing the output force under the same rated pressure by increasing the force-bearing area.
[0040] Under the same working conditions, the output force of this utility model device is increased by more than 40% compared with that of a single-plunger hydraulic cylinder.
[0041] This invention breaks through the limitations of traditional hydraulic cylinders that rely on "high pressure" or "large size" to increase output force. Through optimized design, it can generate greater actuation force at lower system pressure, meeting the needs of heavy-duty working conditions. At the same time, this invention does not require increasing the hydraulic system pressure, reducing power loss caused by high-pressure operation and lowering equipment operating costs.
[0042] This invention avoids the increase in equipment size caused by increasing the piston diameter, thus saving material and processing costs. At the same time, the small size design of this device facilitates integration, reduces the difficulty of spatial layout, and adapts to the needs of compact equipment.
[0043] Although the present invention has been described with reference to a limited number of embodiments, those skilled in the art will understand from the foregoing description that other embodiments are conceivable within the scope of the present invention described herein. Furthermore, it should be noted that the language used in this specification has been chosen primarily for readability and edibility purposes, and not for interpreting or limiting the subject matter of the invention. Therefore, many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the appended claims. Regarding the scope of the invention, the disclosure made is illustrative and not restrictive, and the scope of the invention is defined by the appended claims.
Claims
1. A new type of hydraulic cylinder with increased area of force application, characterized in that, It includes an outer cylinder (1), an inner cylinder (2), a piston rod (3), and an end cap; The outer cylinder (1) has a concave shape, and the inner cylinder (2) has a convex shape. The inner cylinder (2) can be movably installed inside the outer cylinder (1). The end cap includes a first end cap (4) and a second end cap (6). The first end cap (4) is provided on the left side of the inner cavity of the inner cylinder (2). The second end cap (6) is provided between the right outer wall of the inner cylinder (2) and the outer cylinder (1). An exhaust chamber is formed between the outer cylinder (1), the inner cylinder (2) and the second end cap (6). A first exhaust hole (18) is provided on the inner cylinder (2) to connect the inner cavity of the inner cylinder (2) with the exhaust chamber. A second exhaust hole (19) is provided on the second end cap (6) to exhaust the gas from the exhaust chamber. The piston rod (3) passes through the outer cylinder (1) and the first end cap (4) in sequence and then enters the inner cavity of the inner cylinder (2). The piston rod (3) is provided with a channel.
2. A novel hydraulic cylinder for increasing the force receiving area according to claim 1, characterized in that, A retaining ring (20) is provided at the oil inlet of the outer cylinder (1).
3. The novel hydraulic cylinder with increased force-bearing area according to claim 1, characterized in that, A first support ring (10), a second support ring (11), a third support ring (12) and a fourth support ring (13) are respectively provided between the inner cylinder (2) step and the outer cylinder (1), between the second end cover (6) and the inner cylinder (2), between the piston rod (3) and the inner cylinder (2), and between the piston rod (3) and the first end cover (4).
4. A novel hydraulic cylinder with increased force-bearing area according to claim 3, characterized in that, A first O-ring (7), a second O-ring (8), and a third O-ring (9) are respectively provided between the first end cap (4) and the inner cylinder (2), between the second end cap (6) and the outer cylinder (1), and between the outer cylinder (1) and the piston rod (3). A first sealing ring (14) and a third sealing ring (16) are respectively provided on the right side of the first support ring (10) and the fourth support ring (13). A second sealing ring (15) is provided on the left side of the third support ring (12).
5. A novel hydraulic cylinder with increased force-bearing area according to claim 1, characterized in that, A dustproof ring (17) is provided between the inner cylinder (2) and the second end cover (6).