Oil cylinder seat structure

Abstract

The utility model relates to the field of aerial work platforms, and discloses an oil cylinder seat structure which comprises a front side plate, a lug plate, a connecting plate, a rear side plate and a lifting lug, the front side plate, the connecting plate, the rear side plate and the lifting lug are all fixed on a rotary table side plate, the connecting plate is fixed between the front side plate and the rear side plate, the lug plate is fixed among the front side plate, the connecting plate and the rear side plate, and the lifting lug is fixed on the rotary table side plate. The oil cylinder seat structure further comprises a first sealing plate, the first sealing plate is fixed among the front side plate, the connecting plate and the rear side plate, the first sealing plate is fixed on the rotary table side plate, the first sealing plate and the lug plate are separated by the connecting plate, and the rear side plate is fixed with the lifting lug. According to the oil cylinder seat, the problem that an existing oil cylinder seat is weak in strength can be solved, the structural strength and rigidity are greatly enhanced, the strength and rigidity of structural parts are improved by more than two times, and the risk of fatigue cracking of the structural parts in the whole life cycle is eliminated.

Description

Technical Field

[0001] This utility model relates to a cylinder seat structure, belonging to the field of aerial work platforms. Background Technology

[0002] Currently, the hydraulic leveling mechanism of the three-hinged telescopic boom aerial work platform is as follows: Figure 1 As shown, the flow rate of the lower leveling cylinder 16, which adjusts the boom 15, is transmitted to the upper leveling cylinder 14. The angle of change of the upper leveling cylinder 14 is approximately equal to the angle of change of the lower leveling cylinder 16, achieving the effect of hydraulic leveling. The lower leveling cylinder seat 17, which houses the lower leveling cylinder 16, plays a crucial role in transmitting the force of the leveling cylinder. The lower leveling cylinder seat 17 (hereinafter referred to as the cylinder seat) is welded to the turntable 19.

[0003] The existing leveling cylinder seat is attached. Figure 2 As shown, the structure consists of two side plates (front side plate 1 and rear side plate 6), ear plate 2, connecting plate 3, and lifting lug 5. All four side plates, ear plate 2, connecting plate 3, and lifting lug 5 are welded to the turntable side plate 4. During the boom 15's elevation process, the boom 15 is driven by the main hydraulic cylinder 18, while the leveling cylinder 16 passively extends or retracts. The leveling cylinder 16 is under tension during boom 15's ascent and under pressure during boom 15's descent. The leveling cylinder seat 17 experiences extremely high thrust and tension, with constantly changing directions. The stress conditions on the leveling cylinder seat 17 are extremely harsh, and the cylinder seat relies solely on the two side plates to bear the constantly changing tension and pressure of the leveling cylinder. This results in extremely poor structural conditions and a risk of cracking under alternating stress. Utility Model Content

[0004] The present invention aims to provide a cylinder seat structure that solves the problem that existing cylinder seats are weak and prone to cracking under alternating stress.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A hydraulic cylinder seat structure includes a front side plate, a lug plate, a connecting plate, a rear side plate, and a lifting lug. The front side plate, connecting plate, rear side plate, and lifting lug are all fixed to a turntable side plate. The connecting plate is fixed between the front side plate and the rear side plate. The lug plate is fixed between the front side plate, the connecting plate, and the rear side plate. The hydraulic cylinder seat structure also includes a first sealing plate, which is fixed between the front side plate, the connecting plate, and the rear side plate. The first sealing plate is fixed to the turntable side plate and is separated from the lug plate by the connecting plate. The rear side plate is fixed to the lifting lug.

[0007] Furthermore, the ear plate is welded and fixed to the turntable side plate or welded and fixed to the turntable side plate through a bushing.

[0008] Furthermore, the bushing is concentric with the shaft hole of the lug plate.

[0009] Furthermore, a first stiffener and a second stiffener are fixed on the turntable side plate. The first stiffener is fixed to one side of the rear side plate, and the second stiffener is fixed to the rear side plate and the lifting lug, respectively.

[0010] Furthermore, a third stiffener assembly and a second sealing plate are fixed on the turntable side plate. The third stiffener assembly and the second sealing plate are fixed on one side of the front side plate, and the second sealing plate is fixed inside the third stiffener assembly.

[0011] Furthermore, the rear side plate is fixed to the lifting lug by a connecting plate.

[0012] Furthermore, the connecting plate is provided with stress buffer grooves.

[0013] Furthermore, the connecting plate is triangular in shape, and the stress buffer groove is semi-circular.

[0014] Furthermore, the cross-section of the front side plate at both ends is different from the cross-section in the middle, the cross-section of the rear side plate at both ends is different from the cross-section in the middle, and the cross-section of the lifting lug at both ends is different from the cross-section in the middle.

[0015] Furthermore, the length of the rear side panel is less than or equal to the length of the front side panel.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. The hydraulic cylinder seat of this utility model can enhance the structural strength and rigidity by setting a first sealing plate and welding and fixing the rear side plate to the lifting lug, thereby avoiding the risk of structural component cracking and avoiding the cracking of traditional hydraulic cylinder seats under alternating stress.

[0018] 2. The cylinder seat of this utility model greatly enhances the structural strength and rigidity by setting a first sealing plate, bushing, and welding the rear side plate and lifting lug together with connecting plates. The strength and rigidity of the structural components are increased by more than 2 times, eliminating the risk of fatigue cracking of the structural components throughout their entire life cycle and solving the problem of weak strength of existing cylinder seats.

[0019] 3. The cylinder seat of this utility model greatly improves the strength and rigidity of the entire cylinder seat structure by setting a first sealing plate, a connecting plate, a first stiffening plate, a second stiffening plate, a third stiffening plate assembly, a second sealing plate, and welding and fixing the rear side plate and the lifting lug through the connecting plate. It solves the problem of the cylinder seat being torn due to complex alternating stress and eliminates the risk of fatigue cracking of structural components throughout their entire life cycle. Attached Figure Description

[0020] Figure 1 This is a structural schematic diagram of an existing hydraulic leveling mechanism;

[0021] Figure 2 This is a schematic diagram of the existing leveling cylinder seat structure;

[0022] Figure 3 This is a schematic diagram of the structure of Embodiment 2 of this utility model;

[0023] Figure 4 This is a schematic diagram of the structure of each part of this utility model;

[0024] Figure 5 This is a structural schematic diagram of Embodiment 3 of this utility model.

[0025] In the figure

[0026] 1. Front side plate; 2. Ear plate; 3. Connecting plate; 4. Turntable side plate; 5. Lifting lug; 6. Rear side plate; 7. Connecting plate; 8. First sealing plate; 9. Bushing; 10. First stiffening plate; 11. Second stiffening plate; 12. Third stiffening plate assembly; 13. Second sealing plate; 14. Upper leveling cylinder; 15. Main boom; 16. Lower leveling cylinder; 17. Lower leveling cylinder seat; 18. Main cylinder; 19. Turntable. Detailed Implementation

[0027] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" appearing below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0028] Example 1

[0029] A cylinder seat structure is welded and installed on a turntable side plate 4. The cylinder seat structure of this embodiment includes a front side plate 1, an ear plate 2, a connecting plate 3, a rear side plate 6, a lifting lug 5, and a first sealing plate 8. The front side plate 1, connecting plate 3, rear side plate 6, lifting lug 5, and first sealing plate 8 are all welded and fixed to the turntable side plate 4. The connecting plate 3 is fixed between the front side plate 1 and the rear side plate 6. The ear plate 2 is fixed within the area enclosed by the front side plate 1, connecting plate 3, and rear side plate 6. The first sealing plate 8 is fixed within the area enclosed by the front side plate 1, connecting plate 3, and rear side plate 6, and is positioned opposite to the ear plate 2, separated by the connecting plate 3. The rear side plate 6 is welded and fixed to the lifting lug 5.

[0030] In this embodiment, the front side plate 1, the rear side plate 6, and the lifting lug 5 all adopt a variable stiffness design (or a variable cross-section design at the weld end) at the weld end of the turntable side plate 4. This can transfer the sudden change in structural stress from the weld position to the base material and avoid cracking of the structural components during welding.

[0031] In this embodiment, the rear side plate 6 is shorter than the front side plate 1, and the rear side plate 6 is obliquely welded to the lifting lug 5. This facilitates the transfer of the force from the lug plate 2 to the front side plate 1 and the rear side plate 6 to the lifting lug 5, thereby enhancing the structural strength and rigidity and preventing structural cracking.

[0032] In this embodiment, the first sealing plate 8 is a bent plate, which is formed by bending a straight plate at a right angle or an obtuse angle.

[0033] The beneficial effects of this embodiment are as follows: by setting the first sealing plate 8 and welding and fixing the rear side plate 6 to the lifting lug 5, the structural strength and rigidity can be enhanced, avoiding the risk of structural component cracking and avoiding the situation where the traditional oil cylinder seat cracks under alternating stress.

[0034] Example 2

[0035] like Figure 3 , Figure 4 As shown, a cylinder seat structure is welded and installed on the turntable side plate 4. The cylinder seat structure of this embodiment includes a front side plate 1, a lug plate 2, a connecting plate 3, a rear side plate 6, a lifting lug 5, a first sealing plate 8, a bushing 9, and a connecting plate 7. The front side plate 1, connecting plate 3, rear side plate 6, lifting lug 5, first sealing plate 8, and bushing 9 are all welded and fixed to the turntable side plate 4. The connecting plate 3 is fixed between the front side plate 1 and the rear side plate 6. The lug plate 2 is fixed within the area enclosed by the front side plate 1, connecting plate 3, and rear side plate 6, and is fixed to the bushing 9. The first sealing plate 8 is fixed within the area enclosed by the front side plate 1, connecting plate 3, and rear side plate 6, and is positioned opposite to the lug plate 2, separated from it by the connecting plate 3. The rear side plate 6 is shorter than the front side plate 1. The rear side plate 6 is welded to the lifting lug 5 via a connecting plate 7. The rear side plate 6 is obliquely welded to the lifting lug 5, and a connecting plate 3 is welded between the rear side plate 6 and the lifting lug 5. This facilitates the transfer of force from the lug plate 2 to the front side plate 1 and the rear side plate 6 to the lifting lug 5 via the connecting plate 3, enhancing structural strength and rigidity and preventing structural component cracking. The bushing 9 is welded to the process hole of the turntable side plate 4. The bushing 9 and the lug plate 2's shaft hole are concentric. The hole in the bushing 9 and the hole in the lug plate 2 jointly bear the tension or pressure of the cylinder installed on the lower cylinder seat, reducing the stress on the lug plate 2's hole by about 15% and improving structural stress distribution. A semi-circular stress buffer groove is designed on the connecting plate 7. This ensures the overall integrity of the cylinder seat and prevents excessive stiffness at the weld joint caused by the connection between the connecting plate 7 and the rear side plate 6, achieving reasonable and coordinated stiffness and more even and reasonable stress distribution on each structural component.

[0036] In this embodiment, the front side plate 1, the rear side plate 6, and the lifting lug 5 all adopt a variable stiffness design (or a variable cross-section design at the welded end) at the turntable side plate 4. This can transfer the sudden change in structural stress from the weld position to the base material, avoiding the risk of structural components cracking at the welded part.

[0037] In this embodiment, the first sealing plate 8 is a bent plate, formed by bending a straight plate at a right angle or an obtuse angle. The connecting plate 7 is triangular, being an isosceles triangular plate. The bushing 9 is a hollow cylindrical shape.

[0038] The beneficial effects of this embodiment are as follows: by setting the first sealing plate 8, bushing 9, and welding and fixing the rear side plate 6 and the lifting lug 5 through the connecting plate 7, the structural strength and rigidity are greatly enhanced, the strength and rigidity of the structural components are increased by more than 2 times, the risk of fatigue cracking of the structural components during the entire life cycle is eliminated, and the problem of weak strength of the existing cylinder seat is solved.

[0039] Example 3

[0040] like Figure 5As shown, a cylinder seat structure is welded and installed on the turntable side plate 4. The cylinder seat structure of this embodiment includes a front side plate 1, an ear plate 2, a connecting plate 3, a rear side plate 6, a lifting lug 5, a first sealing plate 8, a connecting plate 7, a first stiffening plate 10, a second stiffening plate 11, a third stiffening plate assembly 12, and a second sealing plate 13. The front side plate 1, ear plate 2, connecting plate 3, rear side plate 6, lifting lug 5, first sealing plate 8, first stiffening plate 10, second stiffening plate 11, third stiffening plate assembly 12, and second sealing plate 13 are all welded and fixed to the turntable side plate 4. The connecting plate 3 is fixed between the front side plate 1 and the rear side plate 6. The ear plate 2 is fixed within the area enclosed by the front side plate 1, connecting plate 3, and rear side plate 6. The first sealing plate 8 is fixed within the area enclosed by the front side plate 1, connecting plate 3, and rear side plate 6, and is positioned opposite to the ear plate 2, separated by the connecting plate 3. The length of the rear side plate 6 is less than or equal to the length of the front side plate 1. The rear side plate 6 is welded to the lifting lug 5 via a connecting plate 7. The rear side plate 6 is obliquely welded to the lifting lug 5, and the connecting plate 3 is welded between the rear side plate 6 and the lifting lug 5. This facilitates the transfer of force from the lug plate 2 to the front side plate 1 and the rear side plate 6 to the lifting lug 5 via the connecting plate 3, thereby enhancing the structural strength and rigidity and preventing structural component cracking. A semi-circular stress buffer groove is designed on the connecting plate 7. This ensures the integrity of the cylinder seat and prevents excessive stiffness at the weld joint caused by the connection between the connecting plate 7 and the rear side plate 6, achieving reasonable and coordinated rigidity and more uniform and reasonable stress distribution on each structural component. The first stiffener 10 and the second stiffener 11 are both welded to the rear side plate 6 from the side. The second stiffener 11 is welded and fixed to the rear side plate 6 and the lifting lug 5 respectively. The third stiffener assembly 12 and the second sealing plate 13 are both welded to the front side plate 1 from the side. The third stiffener assembly 12 consists of two oppositely arranged stiffeners, and the second sealing plate 13 is welded and fixed between these two stiffeners. By adding the connecting plate 7, the first stiffener 10, the second stiffener 11, the third stiffener assembly 12, and the second sealing plate 13, the strength and rigidity of the cylinder seat are greatly improved.

[0041] In this embodiment, the front side plate 1, the rear side plate 6 (and the lifting lug 5) all adopt a variable stiffness design (or a variable cross-section design at the weld end) at the turntable side plate 4. This can transfer the sudden change in structural stress from the weld position to the base material and avoid welding cracks in the structural components.

[0042] In this embodiment, the first sealing plate 8 is a straight plate or an arc-shaped plate. The connecting plate 7 is triangular, specifically an isosceles triangle. The second sealing plate 13 is a straight plate or an arc-shaped bent plate.

[0043] The beneficial effects of this embodiment are as follows: by setting the first sealing plate 8, connecting plate 7, first stiffening plate 10, second stiffening plate 11, third stiffening plate assembly 12, second sealing plate 13, and welding and fixing the rear side plate 6 and the lifting lug 5 through the connecting plate 7, the strength and rigidity of the entire cylinder seat structure are greatly improved, the problem of the cylinder seat being torn due to complex alternating stress is solved, and the risk of fatigue cracking of structural components during the entire life cycle is eliminated.

[0044] Example 4

[0045] The difference between this embodiment and Embodiment 2 is that the cylinder seat structure further includes a first stiffening plate 10, a third stiffening plate assembly 12, and a second sealing plate 13. The first stiffening plate 10 is welded to the rear side plate 6 from the side; the third stiffening plate assembly 12 and the second sealing plate 13 are both welded to the front side plate 1 from the side. The third stiffening plate assembly 12 is composed of two oppositely arranged stiffening plates, and the second sealing plate 13 is welded and fixed between these two stiffening plates.

[0046] In this embodiment, the cylinder seat structure also includes a second stiffening plate 11. The second stiffening plate 11 is welded to the rear side plate 6 from the side, and the second stiffening plate 11 is welded and fixed to the rear side plate 6 and the lifting lug 5 respectively.

[0047] The beneficial effects of this embodiment are as follows: by setting the first sealing plate 8, bushing 9, first stiffening plate 10, third stiffening plate assembly 12, second sealing plate 13, and welding and fixing the rear side plate 6 and the lifting lug 5 through the connecting plate 7, the structural strength and rigidity are greatly enhanced, the strength and rigidity of the structural components are increased by more than 2 times, the risk of fatigue cracking of the structural components during the whole life cycle is eliminated, and the problem of traditional cylinder seats being torn due to complex alternating stress is solved.

[0048] The advantages of this utility model are as follows:

[0049] This invention solves the problem of cylinder seats being torn due to complex alternating stress.

[0050] This invention improves the shape and arrangement of structural components, alters and disperses the stress state of the structure, greatly reduces the risk of structural damage, and increases product safety.

[0051] The above embodiments should be understood as being used only to illustrate the present invention more clearly, and not to limit the scope of the present invention. After reading the present invention, any modifications of the embodiments by those skilled in the art in various equivalent forms fall within the scope defined by the appended claims.

Claims

1. A cylinder seat structure, comprising a front side plate (1), a lug plate (2), a connecting plate (3), a rear side plate (6), and a lifting lug (5), wherein the front side plate (1), the connecting plate (3), the rear side plate (6), and the lifting lug (5) are all fixed on a turntable side plate (4), the connecting plate (3) is fixed between the front side plate (1) and the rear side plate (6), and the lug plate (2) is fixed between the front side plate (1), the connecting plate (3), and the rear side plate (6), characterized in that, The cylinder seat structure also includes a first sealing plate (8), which is fixed between the front side plate (1), the connecting plate (3), and the rear side plate (6). The first sealing plate (8) is fixed on the turntable side plate (4). The first sealing plate (8) and the ear plate (2) are separated by the connecting plate (3). The rear side plate (6) is fixed to the lifting lug (5).

2. The cylinder seat structure according to claim 1, characterized in that, The ear plate (2) is welded to the turntable side plate (4) or welded to the turntable side plate (4) through the bushing (9).

3. The cylinder seat structure according to claim 2, characterized in that, The bushing (9) and the ear plate (2) are concentric.

4. The cylinder seat structure according to claim 2, characterized in that, The turntable side plate (4) is fixed with a first stiffener (10) and a second stiffener (11). The first stiffener (10) is fixed to one side of the rear side plate (6), and the second stiffener (11) is fixed to the rear side plate (6) and the lifting lug (5) respectively.

5. The cylinder seat structure according to claim 4, characterized in that, The turntable side plate (4) is fixed with a third stiffener assembly (12) and a second sealing plate (13). The third stiffener assembly (12) and the second sealing plate (13) are fixed on one side of the front side plate (1), and the second sealing plate (13) is fixed inside the third stiffener assembly (12).

6. The cylinder seat structure according to any one of claims 1 to 5, characterized in that, The rear side plate (6) and the lug (5) are fixed together by a connecting plate (7).

7. The cylinder seat structure according to claim 6, characterized in that, The connecting plate (7) is provided with a stress buffer groove.

8. The cylinder seat structure according to claim 7, characterized in that, The connecting plate (7) is triangular in shape, and the stress buffer groove is semi-circular.

9. The cylinder seat structure according to any one of claims 1 to 5, characterized in that, The front side plate (1) has a different cross section at both ends than the middle cross section, the rear side plate (6) has a different cross section at both ends than the middle cross section, and the lifting lug (5) has a different cross section at both ends than the middle cross section.

10. The cylinder seat structure according to claim 9, characterized in that, The length of the rear side plate (6) is less than or equal to the length of the front side plate (1).

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