A lightweight variable-luffing cylinder

Abstract

The present invention discloses a lightweight variable-length oil cylinder, wherein the cylinder body comprises a tail, a connecting part and a head, wherein the diameter of the tail is smaller than the diameter of the connecting part; a plurality of first longitudinal grooves are provided around the outer wall of the tail, wherein each first longitudinal groove is provided with a reinforcing plate; two annular grooves are provided around the outer wall of the tail, wherein each first longitudinal groove is respectively located between each annular groove, wherein each annular groove is sleeved with a reinforcing ring; the diameter of the second longitudinal groove is smaller than the connecting part and larger than the diameter of the tail; the structure in the second longitudinal groove is the same as the structure in the first longitudinal groove; and anti-collision reinforcement units are provided around the center lines of the tail and the head. The present invention can ensure the strength of the overall structure while reducing the thickness of the cylinder, and at the same time, by providing the anti-collision reinforcement unit, further improve the structural strength, thereby avoiding damage caused by external force impact, and also has the beneficial effects of simple structure and long service life.

Description

Technical Field

[0001] The invention relates to an oil cylinder, in particular to a lightweight variable-luff oil cylinder. Background Art

[0002] The luffing cylinder plays a vital role in the crane and has been used more and more widely. The cylinder barrel is one of the important components of the cylinder. Increasing the wall thickness of the cylinder barrel can effectively improve the strength of its structure, thereby making its performance more stable. Although the increase in the thickness of the cylinder barrel improves the structural strength, it will also increase the overall weight. Although reducing the wall thickness of the cylinder barrel can reduce the overall weight, it will lead to a decrease in the strength of the entire structure. In particular, the defect of insufficient lateral strength of the structure is particularly obvious, resulting in very weak lateral anti-collision force and being easily damaged. Since the entire crane needs to be weight-limited, the overall weight of the SQS300A luffing cylinder, which is a core component, becomes particularly important. How to optimize the structure while ensuring performance, so as to achieve the purpose of reducing the overall weight, is a technical problem that urgently needs to be solved.

[0003] Therefore, those skilled in the art are committed to providing a lightweight variable-luffing cylinder that can effectively solve the above-mentioned technical problems. Summary of the invention

[0004] In view of the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is to provide a lightweight variable-luffing cylinder which can effectively solve the above-mentioned technical problems.

[0005] To achieve the above-mentioned object, the present invention provides a lightweight variable-luff cylinder, comprising a cylinder body, a shell detachably provided along the length direction of the cylinder body, the cylinder body being arranged in the shell, the cylinder body comprising a tail portion, a connecting portion and a head portion, the diameter of the tail portion being smaller than the diameter of the connecting portion (3); a plurality of first longitudinal grooves are provided around the outer wall of the tail portion, a reinforcing plate is provided in each of the first longitudinal grooves, two annular grooves are provided on the outer wall of the tail portion, each of the first longitudinal grooves is respectively located between the annular grooves, and a reinforcing ring is sleeved in each of the annular grooves;

[0006] The diameter of the connecting portion is larger than the diameter of the tail portion, the lower end of the connecting portion is connected to the upper end of the tail portion, and the upper end of the connecting portion is connected to the lower end of the head portion; the head portion is provided with a second longitudinal groove, the diameter of the second longitudinal groove is smaller than the diameter of the connecting portion and larger than the diameter of the tail portion; the structure within the second longitudinal groove is the same as the structure within the first longitudinal groove; anti-collision reinforcement units are provided around the center lines of the tail portion and the head portion.

[0007] Preferably, the number of the first longitudinal grooves is five, and the first longitudinal grooves are arranged in a circular array around the center line of the cylinder body, and the reinforcing plates located in each first longitudinal groove are detachably arranged in each first longitudinal groove by screws.

[0008] Preferably, a plurality of first support blocks are disposed on inner walls at both ends of the first longitudinal groove, each adjacent two first support blocks are spaced apart, and both ends of each reinforcement plate are respectively connected to each first support block.

[0009] Preferably, the inner wall of each annular groove is provided with a plurality of second support blocks used in conjunction with each first support block, and each second support block is arranged one-to-one corresponding to each first support block, one side of each reinforcement ring is respectively connected to each second support block, and the other side of each reinforcement ring is respectively connected to the inner side of the tail.

[0010] Preferably, the center lines of the first support block, the second support block, the reinforcement ring and the reinforcement plate coincide with the center line of the tail portion, and the first support block, the second support block, the reinforcement ring and the reinforcement plate have the same diameter.

[0011] Preferably, a plurality of reinforcing ribs are arranged outside the connecting portion, and the reinforcing ribs are arranged in a circular array around the center line of the connecting portion.

[0012] Preferably, the anti-collision reinforcement unit comprises a plurality of detachable reinforcement rods arranged at the tail and the head, and each of the reinforcement rods is arranged in a circular array around the center line of the cylinder body;

[0013] Each of the reinforcing rods is respectively located between two adjacent first longitudinal grooves, an arc-shaped plate is arranged on the inner side of the reinforcing rod, the reinforcing rod is connected to the arc-shaped plate by a fixing member, limiting notches are arranged on both sides of the arc-shaped plate, a plurality of groups of limiting seats are arranged inside the first longitudinal groove, each group of limiting seats has two seats, each of the arc-shaped plates is respectively located between the limiting seats, and each of the limiting seats is respectively located at the limiting notches at both ends of each of the arc-shaped plates.

[0014] Preferably, the cylinder body is provided with a plurality of positioning seats used in cooperation with each other, each of the positioning seats is provided with a positioning hole for the reinforcing rod to pass through, and the reinforcing rod is detachably connected to the cylinder body by bolts.

[0015] Preferably, the connection portion between each of the reinforcing ribs and the cylinder body is an integrally formed structure, and the cross-section of the reinforcing rib is semicircular.

[0016] The beneficial effects of the present invention are as follows: the present invention can reduce the thickness of the cylinder while ensuring the strength of the overall structure, and at the same time further improve the structural strength by setting an anti-collision reinforcement unit, while avoiding damage caused by external force impact, and also has the beneficial effects of simple structure and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a specific implementation mode of the present invention.

[0018] Figure 2 It is a schematic diagram of the structure without the housing installed on the cylinder body.

[0019] Figure 3 It is a partial structural schematic diagram of the tail and other parts of the cylinder body of the present invention.

[0020] Figure 4 It is a structural schematic diagram of the reinforcement unit.

[0021] Figure 5 It is a top view structural diagram of the upper limit notch on the arc plate and the limit seat used in conjunction with each other. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0023] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] like Figures 1 to 5As shown, a lightweight variable-luffing oil cylinder comprises a cylinder body 1, a shell 60 is detachably provided along the length direction of the cylinder body 1, the cylinder body 1 is arranged in the shell 60, the cylinder body 1 comprises a tail portion 2, a connecting portion 3 and a head portion 5, the diameter of the tail portion 2 is smaller than the diameter of the connecting portion 3; a plurality of first longitudinal grooves 6 are provided around the outer wall of the tail portion 2, a reinforcing plate 7 is provided in each of the first longitudinal grooves 6, two annular grooves 8 are provided on the outer wall of the tail portion 2, each of the first longitudinal grooves 6 is respectively located between the annular grooves 8, and a reinforcing ring 9 is sleeved in each of the annular grooves 8;

[0026] The diameter of the connecting portion 3 is larger than the diameter of the tail portion 2, the lower end of the connecting portion 3 is connected to the upper end of the tail portion 2, and the upper end of the connecting portion 3 is connected to the lower end of the head portion 5; the head portion 5 is provided with a second longitudinal groove 10, the diameter of the second longitudinal groove 10 is smaller than the diameter of the connecting portion 3 and larger than the diameter of the tail portion 2; the structure in the second longitudinal groove 10 is the same as the structure in the first longitudinal groove 6; anti-collision reinforcement units 11 are provided around the center lines of the tail portion 2 and the head portion 5. Figure 1 The structure of the reinforcement unit 11 is not fully shown.

[0027] There are five first longitudinal grooves 6, and each of the first longitudinal grooves 6 is arranged in a circular array around the center line of the cylinder body 1. The above arrangement can reduce the weight while ensuring the strength of the overall structure. In order to facilitate maintenance and replacement after long-term use, the reinforcing plate 7 located in each first longitudinal groove 6 is detachably arranged in each first longitudinal groove 6 by screws.

[0028] The inner walls at both ends of the first longitudinal groove 6 are provided with a plurality of first support blocks 12, each adjacent two first support blocks 12 are arranged at intervals, and both ends of each reinforcing plate 7 are respectively connected to each first support block 12. By providing a plurality of first supports 12, not only the overall strength is ensured, but also the weight is reduced.

[0029] The inner wall of each of the annular grooves 8 is provided with a plurality of second support blocks 13 used in conjunction with each of the first support blocks 12, and each of the second support blocks 13 is respectively arranged in one-to-one correspondence with each of the first support blocks 12, one side of each of the reinforcement rings 9 is respectively connected to each of the second support blocks 13, and the other side of each of the reinforcement rings 9 is respectively connected to the inner side of the tail portion 2.

[0030] The center lines of the first support block 12, the second support block 13, the reinforcement ring 9 and the reinforcement plate 7 coincide with the center line of the tail portion 2, and the first support block 12, the second support block 13, the reinforcement ring 9 and the reinforcement plate 7 have the same diameter. A plurality of reinforcement ribs 15 are arranged on the outside of the connecting portion 3, and each of the reinforcement ribs 15 is arranged in a circular array around the center line of the connecting portion 3.

[0031] The anti-collision reinforcement unit 11 includes a plurality of detachable reinforcement rods 16 disposed at the tail portion 2 and the head portion 5, and each of the reinforcement rods 16 is disposed in a circular array around the center line of the cylinder body 1;

[0032] Each of the reinforcing rods 16 is respectively located between two adjacent first longitudinal grooves 6, and an arc-shaped plate 17 is arranged on the inner side of the reinforcing rod 16. The reinforcing rod 16 and the arc-shaped plate 17 are connected by a fixing member 18. Limiting notches 19 are arranged on both sides of the arc-shaped plate 17. Several groups of limiting seats 20 are arranged inside the first longitudinal groove 6, and the number of each group of limiting seats 20 is two. Each of the arc-shaped plates 17 is respectively located between the limiting seats 20, and each of the limiting seats 20 is respectively located at the limiting notches 19 at both ends of each of the arc-shaped plates 17.

[0033] The cylinder body 1 is provided with a plurality of positioning seats 22 for use in conjunction with each other, each positioning seat 22 is provided with a positioning hole 23 for the reinforcing rod 16 to pass through, and the reinforcing rod 16 is detachably connected to the cylinder body 1 by bolts. Each reinforcing rib 15 is an integrally formed structure with the connecting portion 3 of the cylinder body 1, and the cross section of the reinforcing rib 15 is semicircular.

[0034] The present invention increases the overall wall thickness of the original cylinder body 1 appropriately or keeps it unchanged, and opens a tail 2, a connecting part 3 and a head 5 along the outer wall of the cylinder body 1. The diameters of the tail 2, the connecting part 3 and the head 5 are all smaller than the wall thickness of the original cylinder body 1, thereby reducing the overall weight. In order to maintain the structural strength while reducing the overall weight, thereby ensuring the performance, the present invention opens a first longitudinal groove around the outer wall of the tail and the head, and improves the longitudinal and radial strength of the cylinder body by the reinforcement plate provided in the first longitudinal groove and the reinforcement ring provided in the annular groove. At the same time, the anti-collision reinforcement unit provided can not only prevent the cylinder body from being hit by external forces, but also further improve the strength of the overall structure. At the same time, the various components in the present invention are detachably connected. When any of the components is damaged, it can be replaced separately, reducing the cost of maintenance and use. In addition, the present invention does not limit the specific oil cylinder model of the structure to be modified, and can be applied to the modification of various oil cylinder models.

[0035] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A lightweight variable-luffing cylinder, characterized by: The invention comprises a cylinder body (1), a shell (60) detachably arranged along the length direction of the cylinder body (1), the cylinder body (1) being arranged in the shell (60), the cylinder body (1) comprising a tail portion (2), a connecting portion (3) and a head portion (5), the diameter of the tail portion (2) being smaller than the diameter of the connecting portion (3); a plurality of first longitudinal grooves (6) are arranged around the outer wall of the tail portion (2), a reinforcing plate (7) is arranged in each of the first longitudinal grooves (6), two annular grooves (8) are arranged in the outer wall of the tail portion (2), each of the first longitudinal grooves (6) is respectively located between each of the annular grooves (8), and a reinforcing ring (9) is sleeved in each of the annular grooves (8); The diameter of the connecting portion (3) is greater than the diameter of the tail portion (2), the lower end of the connecting portion (3) is connected to the upper end of the tail portion (2), and the upper end of the connecting portion (3) is connected to the lower end of the head portion (5); the head portion (5) is provided with a second longitudinal groove (10), the diameter of the second longitudinal groove (10) is smaller than the diameter of the connecting portion (3) and greater than the diameter of the tail portion (2); the structure in the second longitudinal groove (10) is the same as the structure in the first longitudinal groove (6); anti-collision reinforcement units (11) are arranged around the center lines of the tail portion (2) and the head portion (5); a plurality of first support blocks (12) are arranged on the inner walls at both ends of the first longitudinal groove (6), each adjacent two first support blocks (12) are arranged at intervals, and the two ends of each reinforcement plate (7) are respectively connected to each first support block (12); The anti-collision reinforcement unit (11) comprises a plurality of detachable reinforcement rods (16) arranged at the tail portion (2) and the head portion (5), and each of the reinforcement rods (16) is arranged in a circular array around the center line of the cylinder body (1); Each of the reinforcing rods (16) is located between two adjacent first longitudinal grooves (6), an arc-shaped plate (17) is arranged on the inner side of the reinforcing rod (16), the reinforcing rod (16) and the arc-shaped plate (17) are connected by a fixing member (18), limiting notches (19) are arranged on both sides of the arc-shaped plate (17), a plurality of groups of limiting seats (20) are arranged inside the first longitudinal groove (6), each group of limiting seats (20) has two, each of the arc-shaped plates (17) is located between the limiting seats (20), and each of the limiting seats (20) is located at the limiting notches (19) at both ends of each of the arc-shaped plates (17).

2. The lightweight luffing cylinder according to claim 1, characterized in that: The number of the first longitudinal grooves (6) is five, and the first longitudinal grooves (6) are arranged in a circular array around the center line of the cylinder body (1). The reinforcing plates (7) located in each first longitudinal groove (6) are detachably arranged in each first longitudinal groove (6) by means of screws.

3. The lightweight luffing cylinder according to claim 2, characterized in that: The inner wall of each of the annular grooves (8) is provided with a plurality of second support blocks (13) for use with each of the first support blocks (12); each of the second support blocks (13) is arranged in one-to-one correspondence with each of the first support blocks (12); one side of each of the reinforcement rings (9) is connected to each of the second support blocks (13); and the other side of each of the reinforcement rings (9) is connected to the inner side of the tail portion (2).

4. The lightweight variable-luffing cylinder according to claim 3, characterized in that: The center lines of the first support block (12), the second support block (13), the reinforcement ring (9) and the reinforcement plate (7) coincide with the center line of the tail portion (2), and the diameters of the first support block (12), the second support block (13), the reinforcement ring (9) and the reinforcement plate (7) are the same.

5. The lightweight luffing cylinder according to claim 4, characterized in that: A plurality of reinforcing ribs (15) are arranged outside the connecting portion (3), and the reinforcing ribs (15) are arranged in a circular array around the center line of the connecting portion (3).

6. The lightweight luffing cylinder according to claim 5, characterized in that: The cylinder body (1) is provided with a plurality of positioning seats (22) for use in conjunction with each other, each positioning seat (22) is provided with a positioning hole (23) for the reinforcing rod (16) to pass through, and the reinforcing rod (16) is detachably connected to the cylinder body (1) by bolts.

7. The lightweight variable-luffing cylinder according to claim 6, characterized in that: Each of the reinforcing ribs (15) and the connecting portion (3) of the cylinder body (1) is an integrally formed structure, and the cross section of the reinforcing rib (15) is semicircular.

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