Support leg assembly and engineering machine

Abstract

The utility model relates to a kind of support leg assembly and engineering machinery, comprising: vertical oil cylinder, with center axis;Anti-rollover plate is connected with vertical oil cylinder, anti-rollover plate has tipping line;Support leg seat is equipped with accommodating cavity, anti-rollover plate is located in accommodating cavity, support leg seat has barycentric line, support leg seat moves between extension position and storage position, support leg seat is located in storage position, anti-rollover plate abuts on the top wall of accommodating cavity, in the moving stroke of support leg seat, the interval between barycentric line and center axis is always less than or equal to the interval from tipping line to center axis.The support leg assembly of the utility model embodiment can reduce the probability of tipping of support leg seat due to self-weight, with the advantages of high safety, convenient operation, time-saving and labor-saving.

Description

Technical Field

[0001] This utility model relates to the field of outrigger assembly technology, specifically to an outrigger assembly and engineering machinery. Background Technology

[0002] Outrigger plates are mechanisms used to maintain the stability of construction machinery during operation. They are typically driven by vertical hydraulic cylinders, with the ball joint at the lower end of the cylinders engaging with the outrigger plates to support the machinery and maintain its normal operation.

[0003] Outrigger plates typically come in two forms: fixed outrigger plates and non-fixed outrigger plates. Fixed outrigger plates are mainly used in work scenarios where the outrigger span is relatively small. After the outriggers are retracted, the outrigger plate does not exceed the width edge of the construction machinery. Non-fixed outrigger plates are mainly used in work scenarios where the outrigger span is large. After the outriggers are retracted, the outrigger plate exceeds the width edge of the construction machinery. Therefore, non-fixed outrigger plates are movable relative to the ball joint. After the outriggers are retracted, the outrigger plate can be slid within the width edge of the construction machinery.

[0004] Non-fixed outrigger plates in related technologies typically use ball joints to support the outrigger plates. However, the upper surface area of ​​the ball joint is limited, making it difficult to provide reliable support for the outrigger plates. In some positions, the outrigger plates may tip over, requiring manual intervention from operators, which is time-consuming, labor-intensive, and has low safety. Utility Model Content

[0005] One objective of this utility model is to provide an outrigger assembly to solve the problem that the outrigger plate in the prior art may tip over during movement, resulting in low safety and time and labor costs; the second objective is to provide an engineering machine.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: An outrigger assembly includes: a vertical hydraulic cylinder having a central axis; an anti-tipping plate connected to the vertical hydraulic cylinder, the anti-tipping plate having a tilting line; and an outrigger seat having a receiving cavity, the anti-tipping plate being disposed within the receiving cavity, the outrigger seat having a center of gravity line, the outrigger seat moving between an extended position and a retracted position, the outrigger seat being in the retracted position, the anti-tipping plate abutting against the top wall of the receiving cavity, and during the movement stroke of the outrigger seat, the distance between the center of gravity line and the central axis is always less than or equal to the distance between the tilting line and the central axis.

[0007] Based on the aforementioned technical means, by setting up a receiving cavity and an anti-tipping plate in conjunction, the movement of the outrigger base can be guided, ensuring that the outrigger base moves between the extended position and the retracted position, thus improving the reliability of movement. Furthermore, since the distance between the center of gravity line and the central axis is always less than or equal to the distance between the tipping line and the central axis during the movement of the outrigger base from the extended position to the retracted position, the outrigger base can be effectively supported by the anti-tipping plate, reducing the probability of the outrigger base tipping over due to its own weight, improving safety. Moreover, the operator does not need to exert force to balance the outrigger base, saving physical strength, increasing operational efficiency, and saving time and effort.

[0008] Furthermore, the center of gravity line is located between the two ends of the anti-tipping plate in the direction of movement of the outrigger seat.

[0009] Based on the above-mentioned technical means, the probability of the outriggers tipping over can be reduced more effectively.

[0010] Furthermore, the outrigger assembly also includes a bracket, and the outrigger seat is fixedly connected to the bracket.

[0011] The aforementioned technical means can fix the support leg in the storage position, preventing the support leg from wobbling in the storage position.

[0012] Furthermore, the anti-tipping plate includes: a plate body connected to the vertical hydraulic cylinder; a rotating shaft connected to the plate body, wherein the axial direction of the rotating shaft, the axial direction of the vertical hydraulic cylinder, and the moving direction of the support leg are perpendicular to each other; and a roller rotatably sleeved on the rotating shaft, wherein the support leg is located in the storage position, and the roller abuts against the top wall.

[0013] Based on the above technical means, rolling friction is used between the anti-tipping plate and the outrigger seat, which can reduce the resistance of the outrigger plate during movement, reduce the difficulty of adjustment, improve the adjustment efficiency, and save time and effort.

[0014] Furthermore, the vertical cylinder includes a drive rod and a ball head. The lower end of the drive rod is connected to the ball head, and the portion of the upper surface of the ball head that extends beyond the outer circumference of the drive rod forms a support surface. The plate body is provided with a through hole, the drive rod passes through the through hole, the plate body abuts against the support surface, and the roller is spaced apart from the vertical cylinder.

[0015] Based on the above technical means, the connection between the vertical cylinder and the anti-tipping plate is simple, and the anti-tipping plate is easy to maintain later.

[0016] Furthermore, the plate body includes a first plate body and a second plate body, the rotating shaft passes through the first plate body and the second plate body, the first plate body and the second plate body define a through hole, and both the first plate body and the second plate body abut against the support surface.

[0017] Based on the aforementioned technical means, the first and second plates can be separated from and connected to the rotating shaft, improving the ease of assembly and disassembly between the anti-tipping plate and the drive rod. Furthermore, the rotating shaft not only fixes the rollers but also connects the first and second plates, reducing the number of parts.

[0018] Furthermore, the plate has a first end and a second end, which are arranged opposite to each other along the moving direction of the support leg seat; the support leg seat is located in the extended position, the distance between the center line of gravity of the first end and the support leg seat is L1, the distance between the center line of gravity of the second end and the support leg seat is L2, and L1 > L2; the distance between the first end and the central axis of the vertical cylinder is L3, and the distance between the second end and the central axis of the vertical cylinder is L4, and L3 > L4.

[0019] Based on the aforementioned technical means, the anti-tipping plate mainly utilizes the portion located between the first end and the central axis of the vertical cylinder to prevent the outriggers from tipping over. Therefore, the distance between the first end and the central axis of the vertical cylinder needs to be relatively large to improve the anti-tipping effect. By setting a smaller distance between the second end and the central axis of the vertical cylinder, while ensuring a stable connection between the anti-tipping plate and the vertical cylinder, the weight and volume of the anti-tipping plate can be reduced, thus lowering costs.

[0020] Furthermore, the anti-tipping plate also includes: a support protrusion disposed at the first end, the support protrusion extending beyond the upper surface of the plate body, the support leg seat located at the storage position, and the support protrusion abutting against the top wall.

[0021] According to the above technical means, the first end contacts the top wall through the support protrusion, and the second end contacts the top wall through the roller. The limiting between the anti-tipping plate and the top wall is more uniform, which can prevent the anti-tipping plate from deflecting, thereby ensuring the anti-tipping effect of the anti-tipping plate.

[0022] Furthermore, the plate body includes: a thickened portion having a pivot hole and a mounting hole, the mounting hole penetrating through opposite sides in the thickness direction of the thickened portion and through opposite sides in the width direction of the thickened portion, the pivot passing through the pivot hole, and the roller passing through the mounting hole; and a flat plate portion connected to the thickened portion, the thickness of the thickened portion being greater than the thickness of the flat plate portion.

[0023] According to the above-mentioned technical means, the thickened portion can increase the connection area between the plate and the shaft, and increase the wall thickness of the shaft hole, thus ensuring the connection strength between the plate and the shaft. While ensuring the connection strength between the plate and the shaft, the flat plate portion can reduce the weight and volume of the plate.

[0024] Furthermore, the anti-tipping plate is provided with weight-reducing holes, which penetrate through the opposite sides of the anti-tipping plate in the thickness direction.

[0025] The aforementioned technical methods can reduce the weight and volume of the anti-tipping device, thereby lowering costs.

[0026] An engineering machine, including the aforementioned outrigger assembly.

[0027] Based on the above-mentioned technical means, the construction machinery utilizing the aforementioned outrigger assembly has the advantages of high safety, simple operation, and time and labor saving. Attached Figure Description

[0028] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 This is a cross-sectional view of the outrigger assembly in the prior art, with the outrigger seat in the extended position.

[0030] Figure 2 This is a cross-sectional view of the leg assembly in the prior art, where the leg base is in the storage position.

[0031] Figure 3 This is a schematic diagram of the support leg assembly in an embodiment of this utility model.

[0032] Figure 4 This is a cross-sectional view of the leg assembly in the extended position of the leg seat in this embodiment of the present invention.

[0033] Figure 5 This is a cross-sectional view of the leg assembly in the storage position of this utility model embodiment.

[0034] Figure 6 This is a schematic diagram showing the connection between the vertical hydraulic cylinder and the anti-tipping plate in an embodiment of this utility model.

[0035] Figure 7 This is a schematic diagram of the anti-tipping plate in an embodiment of this utility model.

[0036] Figure 8 This is an exploded view of the anti-tipping plate in an embodiment of this utility model.

[0037] Figure 9 This is a schematic diagram of the vertical hydraulic cylinder in an embodiment of this utility model.

[0038] Figure 10 This is a schematic diagram of the support leg seat in an embodiment of this utility model.

[0039] Explanation of reference numerals in the attached figures: 1. Outrigger assembly; 100. Vertical cylinder; 110. Drive rod; 120. Ball head; 121. Support surface; 130. Central axis; 200. Anti-tipping plate; 210. Plate body; 211. First plate body; 212. Second plate body; 213. Thickened part; 214. Flat plate part; 215. First end; 216. Second end; 220. Roller; 230. Rotating shaft; 240. Weight reduction hole; 250. Support protrusion; 260. Through hole; 270. Mounting hole; 280. Rotating shaft hole; 290. Tilting line; 300, Support leg; 310, Receiving cavity; 311, Top wall; 320, Center line; 330, Concave spherical part; 400, bracket. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0041] The embodiments of this utility model will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be understood that the preferred embodiments are only for illustrating this utility model and not for limiting the scope of protection of this utility model.

[0042] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0043] The following is combined with Figures 3 to 10 The following describes embodiments of the present invention.

[0044] This utility model embodiment proposes a support leg assembly 1, which includes a vertical hydraulic cylinder 100, an anti-tipping plate 200, and a support leg seat 300.

[0045] The vertical cylinder 100 has a central axis 130. The anti-tipping plate 200 is connected to the vertical cylinder 100 and has a tilting line 290. The outrigger seat 300 has a receiving cavity 310 and the anti-tipping plate 200 is located in the receiving cavity 310. The outrigger seat 300 has a center line 320. The outrigger seat 300 moves between an extended position and a retracted position. When the outrigger seat 300 is in the retracted position, the anti-tipping plate 200 abuts against the top wall 311 of the receiving cavity 310. During the movement stroke of the outrigger seat 300, the distance between the center line 320 and the central axis 130 is always less than or equal to the distance between the tilting line 290 and the central axis 130.

[0046] It should be noted that the vertical cylinder 100 has two end faces on its axis, and the connecting line between the center points of the two end faces is the central axis 130. The vertical line extending downwards from the center of gravity of the support leg 300 is the center of gravity line 320. The anti-tipping plate 200 has a first end 215 and a second end 216. The first end 215 and the second end 216 are arranged opposite to each other along the moving direction of the support leg 300. As the support leg 300 moves from the extended position to the retracted position, the center line 320 gradually approaches the first end 215. The vertical line extending downward from the contact point between the first end 215 and the top wall 311 is the tipping line 290.

[0047] Specifically, such as Figure 9 and Figure 10 As shown, the vertical cylinder 100 includes a drive rod 110 and a ball head 120. The lower end of the drive rod 110 is connected to the ball head 120. The outrigger 300 has a concave ball portion 330 in the receiving cavity 310. The drive rod 110 can be raised and lowered in the vertical direction. The anti-tipping plate 200 can be raised and lowered synchronously with the drive rod 110. When the outrigger 300 is in the extended position, the drive rod 110 can be lowered so that the concave ball portion 330 engages with the ball head 120, or the drive rod 110 can be raised to separate the concave ball portion 330 from the ball head 120. The anti-tipping plate 200 and the vertical cylinder 100 can be welded, snapped, threaded, or any other connection method that meets the requirements.

[0048] For example, when the construction machinery is working, the outrigger 300 is in the extended position, extending beyond the width of the machinery. The drive rod 110 descends, the drive ball head 120 engages with the concave ball portion 330, and the relative position between the vertical cylinder 100 and the outrigger 300 is fixed. The outrigger 300 cannot move relative to the vertical cylinder 100, and the outrigger 300 is supported on the ground, maintaining the stability of the construction machinery during operation. After the construction machinery finishes working, the drive rod 110 rises, driving the anti-tipping plate 200 to abut against the top wall 311, causing the outrigger 300 to rise and leave the ground. At this time, the operator can push the outrigger 300 from the extended position to the retracted position. The outrigger 300 is located within the width range of the construction machinery. The outrigger assembly 1 may include a bracket 400. At this time, the outrigger 300 and the bracket 400 are connected, that is, the outrigger 300 is suspended from the bracket 400 to fix the outrigger assembly 1 in the retracted position and prevent the outrigger assembly 1 from shaking.

[0049] By combining the receiving cavity 310 and the anti-tipping plate 200, the movement of the outrigger 300 can be guided, ensuring that the outrigger 300 moves between the extended position and the retracted position, thus improving the reliability of movement. Furthermore, since the distance between the center of gravity line 320 and the central axis 130 is always less than or equal to the distance between the tipping line 290 and the central axis 130 during the movement of the outrigger 300 from the extended position to the retracted position, the outrigger 300 can be effectively supported by the anti-tipping plate 200, reducing the probability of the outrigger 300 tipping over due to its own weight, thus improving safety. In addition, the operator does not need to exert force to balance the weight of the outrigger 300, saving physical strength, increasing operational efficiency, and saving time and effort.

[0050] Furthermore, the center line 320 of the outrigger 300 is always located between the two ends of the anti-tipping plate 200 in the direction of movement of the outrigger 300.

[0051] It should be noted that the support leg 300 is located in the storage position, and the center line 320 of the support leg 300 is located between the two ends of the anti-tipping plate 200 in the direction of movement of the support leg 300. This includes technical solutions where the center line 320 of the support leg 300 passes through the end of the anti-tipping plate 200 in the direction of movement of the support leg 300, and also technical solutions where the center line 320 of the support leg 300 does not pass through the end of the anti-tipping plate 200 in the direction of movement of the support leg 300.

[0052] This can more effectively reduce the probability of the outrigger 300 tipping over.

[0053] In some embodiments, such as Figures 6-8As shown, the anti-tipping plate 200 includes a plate body 210, a rotating shaft 230, and rollers 220. The plate body 210 is connected to the vertical cylinder 100, and the rotating shaft 230 is connected to the plate body 210. The axial direction of the rotating shaft 230, the axial direction of the vertical cylinder 100, and the moving direction of the support leg seat 300 are arranged perpendicularly to each other. The rollers 220 are rotatably sleeved on the rotating shaft 230. The support leg seat 300 is in the storage position, and the rollers 220 abut against the top wall 311.

[0054] In this way, rolling friction is used between the anti-tipping plate 200 and the outrigger 300. Since the resistance of rolling friction is small, the resistance of the outrigger 300 during movement can be reduced, which can reduce the difficulty of adjustment, improve the adjustment efficiency, save time and effort, and provide a good operating experience.

[0055] Furthermore, such as Figure 6 and Figure 9 As shown, the portion of the upper surface of the ball head 120 that extends beyond the outer periphery of the drive rod 110 forms a support surface 121. The plate body 210 is provided with a through hole 260, through which the drive rod 110 passes. The plate body 210 abuts against the support surface 121, and the roller 220 is spaced apart from the vertical cylinder 100.

[0056] In this way, the connection between the vertical cylinder 100 and the anti-tipping plate 200 is simple, requiring no welding or threaded fasteners. The vertical cylinder 100 and the anti-tipping plate 200 are easy to disassemble, and the anti-tipping plate 200 is easy to maintain later.

[0057] Specifically, such as Figure 7 As shown, the plate 210 includes a first plate 211 and a second plate 212. A rotating shaft 230 passes through the first plate 211 and the second plate 212. The first plate 211 and the second plate 212 define a through hole 260. The first plate 211 and the second plate 212 both abut against the support surface 121.

[0058] The first plate 211 and the second plate 212 can be separated from and connected to the rotating shaft 230, improving the ease of assembly and disassembly between the anti-tipping plate 200 and the drive rod 110. In addition, the rotating shaft 230 can not only fix the roller 220 and realize the rolling of the roller 220, but also realize the connection and fixation between the first plate 211 and the second plate 212, reducing the number of parts.

[0059] In some embodiments, such as Figures 4-6As shown, the plate 210 has a first end 215 and a second end 216, which are arranged opposite to each other along the moving direction of the support leg 300. When the support leg 300 is in the extended position, the distance between the first end 215 and the center line 320 of the support leg 300 is L1. When the support leg 300 is in the retracted position, the distance between the second end 216 and the center line 320 of the support leg 300 is L2, where L1 > L2. The distance between the first end 215 and the central axis 130 of the vertical cylinder 100 is L3, and the distance between the second end 216 and the central axis 130 of the vertical cylinder 100 is L4, where L3 > L4.

[0060] The anti-tipping plate 200 mainly uses the part located between the first end 215 and the central axis 130 of the vertical cylinder 100 to prevent the outrigger 300 from tipping over. Therefore, the distance between the first end 215 and the central axis 130 of the vertical cylinder 100 needs to be set relatively large to improve the anti-tipping effect.

[0061] By setting the distance between the second end 216 and the central axis 130 of the vertical cylinder 100 to be small, the weight and volume of the anti-tipping plate 200 can be reduced while ensuring a stable connection between the anti-tipping plate 200 and the vertical cylinder 100, thus reducing costs and decreasing the probability of interference between the support leg 300 and the anti-tipping plate 200 during movement.

[0062] Furthermore, such as Figures 4-8 As shown, the anti-tipping plate 200 also includes a support protrusion 250, which is located at the first end 215 and extends beyond the upper surface of the plate body 210. The support leg seat 300 is located in the storage position, and the support protrusion 250 abuts against the top wall 311.

[0063] It should be noted that the support protrusion 250 and the top wall 311 are in line contact, and the vertical line extending downward from the contact point between the support protrusion 250 and the top wall 311 is the overturning line 290.

[0064] For example, the apex of the support protrusion 250 and the apex of the roller 220 are roughly located in the same horizontal plane. Due to the existence of processing errors and assembly errors, the apex of the support protrusion 250 and the apex of the roller 220 can have a certain height difference.

[0065] The support protrusion 250 can be constructed as a cylinder to ensure line contact between the support protrusion 250 and the top wall 311, thereby reducing friction on the support leg 300 during movement. The support protrusion 250 is symmetrically positioned about the center plane of the anti-tipping plate 200 in the thickness direction, eliminating the need to distinguish between the front and back sides during installation and improving assembly efficiency. Furthermore, the support protrusion 250 can be constructed as a hollow cylinder, reducing its weight and volume, and lowering costs.

[0066] The first end 215 contacts the top wall 311 through the support protrusion 250, and the second end 216 contacts the top wall 311 through the roller 220. The anti-tipping plate 200 and the top wall 311 are more evenly positioned, which can prevent the anti-tipping plate 200 from deflecting relative to the support leg 300, improve the positioning reliability between the anti-tipping plate 200 and the support leg 300, and thus ensure the anti-tipping effect of the anti-tipping plate 200.

[0067] Furthermore, such as Figures 7-8 As shown, there are multiple rotating shafts 230, which are located on opposite sides of the drive rod 110 in the direction of movement of the support leg 300. Each rotating shaft 230 is fitted with multiple rollers 220 spaced apart.

[0068] This increases the number of rolling support points between the outrigger 300 and the anti-tipping plate 200, improves the reliability of the fit, enhances the motion stability between the outrigger 300 and the anti-tipping plate 200, and prevents the anti-tipping plate 200 from tipping over.

[0069] Specifically, such as Figure 6 and Figure 8 As shown, the plate 210 includes a thickened portion 213 and a flat portion 214. The thickened portion 213 is provided with a pivot hole 280 and a mounting hole 270. The mounting hole 270 passes through the opposite sides of the thickened portion 213 in the thickness direction and the opposite sides of the thickened portion 213 in the width direction. The pivot 230 passes through the pivot hole 280 and the roller 220 passes through the mounting hole 270. The flat portion 214 is connected to the thickened portion 213, and the thickness of the thickened portion 213 is greater than the thickness of the flat portion 214.

[0070] By providing the thickened portion 213, the connection area between the plate 210 and the rotating shaft 230 can be increased, and the wall thickness of the rotating shaft hole 280 can be increased, thus ensuring the connection strength between the plate 210 and the rotating shaft 230. While ensuring the connection strength between the plate 210 and the rotating shaft 230, the flat plate portion 214 can reduce the weight and volume of the plate 210, thereby reducing costs.

[0071] The pivot hole 280 can be interference-fitted with the pivot 230 to ensure the reliability of the connection between the plate 210 and the pivot 230.

[0072] In some embodiments, such as Figure 7 and Figure 8 As shown, the anti-tipping plate 200 has weight-reducing holes 240 that penetrate through opposite sides of the anti-tipping plate 200 in the thickness direction. This reduces the weight and volume of the anti-tipping plate 200, lowering costs. The weight-reducing holes 240 can be multiple holes spaced apart to increase the structural strength of the plate 210; alternatively, the weight-reducing holes 240 can be single holes with a large cross-sectional area, resulting in a smaller volume of the anti-tipping plate 200.

[0073] Furthermore, the weight-reducing hole 240 extends through the first end 215. In this way, the area of ​​the weight-reducing hole 240 is larger, which can effectively reduce the volume and weight of the anti-tipping plate 200.

[0074] This embodiment of the invention also proposes an engineering machinery, which includes the aforementioned outrigger assembly 1. The engineering machinery can be a crane.

[0075] The engineering machinery of this utility model embodiment, utilizing the above-mentioned outrigger assembly 1, has the advantages of simple operation and saving time and effort.

[0076] The following description, in conjunction with the accompanying drawings, illustrates the differences between the outrigger assembly 1 of this utility model and the outrigger assembly 11 in the prior art. The vertical cylinder 100 and outrigger seat 300 in the prior art have largely the same structure as those in this utility model embodiment, and therefore the same reference numerals are used: Assuming that in the prior art and in the embodiments of this utility model, when the support leg 300 is in the extended position, the distance H1 between the support leg 300 and the bracket 400 is 116mm.

[0077] like Figure 1 The diagram shows the outrigger 300 in the extended position in the prior art. In the prior art, the vertical line passing through the ball joint 120 and the edge of the support 400 of the outrigger assembly 11 serves as the tilting line 29. The distance H2 between the center line 320 of the outrigger 300 and the tilting line 29 can be 53mm. That is to say, when the outrigger 300 moves 53mm from the extended position to the retracted position, the tilting line 29 and the center line 320 of the outrigger 300 coincide, reaching the critical point where the outrigger 300 tilts due to its own weight. If the outrigger 300 continues to move towards the retracted position without attention or intervention, the outrigger 300 will tilt downward, causing the outrigger 300 to collide with the vertical cylinder 100, and there is a risk of pinching hands.

[0078] Therefore, it can be seen that the existing outrigger assembly 11 requires human intervention during use, such as... Figure 2 As shown, when the outrigger 300 moves 59mm from the extended position to the retracted position, that is, the distance H3 between the center line 320 of the outrigger 300 and the tipping line 29 is 6mm, the force analysis of the outrigger 300 shows that an intervention force F1 needs to be applied to the outrigger 300 to ensure that the outrigger 300 will not tip over and can continue to move to the retracted position. In other words, the intervention force F1 is used to prevent the outrigger 300 from tipping over and to drive the outrigger 300 to move forward.

[0079] F1 can be decomposed into a vertically downward force Fy and a horizontal force Fx. Fy is used to prevent the outrigger 300 from tipping over, and Fx is used to drive the outrigger 300 to move. Assume the weight of the outrigger 300 is 29 kg, the coefficient of sliding friction between the outrigger 300 and the ball joint 120 is 0.42, and the gravitational coefficient is 9.8. Fx = 0.42 × 29 × 9.8 N = 119.36 N; Fy=29×9.8×6 / (165+45)=8.12N; F1 = 119.64 N; At this point, the support leg base 300 needs to move another 57mm to reach the storage position. The support leg base 300 continues to move 57mm: Fx = 0.42 × 29 × 9.8 N = 119.36 N; Fy=29×9.8×(6+57) / (165+45-57)=117.01N; F1 = 167.15 N; Therefore, in the existing technology, in order to move the 29kg support leg 300 from the extended position to the retracted position, a thrust of 167.15N is required.

[0080] like Figure 4 The diagram shown is a schematic representation of the support leg 300 in the extended position in an embodiment of this utility model. Figure 5 As shown, this is a schematic diagram of the support leg 300 in the storage position in an embodiment of the present invention. The tilting line 290 is formed by the vertical line of the first end 215 of the anti-tipping plate 200. The distance from the center line 320 of the support leg 300 to the tilting line 290 is 117mm. That is to say, the support leg 300 moves 116mm from the extended position to the storage position, and the support leg 300 has already moved to the storage position. At this time, the distance from the center line 320 of the support leg 300 to the tilting line 290 is greater than or equal to 0mm. Therefore, the support leg 300 will not tilt during the entire movement process.

[0081] To perform a force analysis on the outrigger seat 300 of this utility model embodiment, an intervention force F2 needs to be applied to the outrigger seat 300 to move the outrigger seat 300 from the extended position to the retracted position. The direction of the intervention force F2 should be perpendicular to the central axis 130 of the vertical cylinder 100. The coefficient of friction between the anti-tipping plate 200 and the outrigger seat 300 is 0.01.

[0082] F2 = 0.01 × 29 × 9.8 N = 2.84 N; Therefore, in this embodiment of the utility model, only 2.84N of force is needed to move the 29kg support leg 300 from the extended position to the retracted position. Compared with the 167.15N thrust in the prior art, the required thrust is reduced by 98.3%, saving time and effort, and ensuring high safety.

[0083] The above embodiments are merely preferred embodiments provided to fully illustrate the present utility model, and the protection scope of the present utility model is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present utility model are all within the protection scope of the present utility model.

[0084] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A support leg assembly, characterized in that, include: A vertical hydraulic cylinder (100) has a central axis (130); An anti-tipping plate (200) is connected to the vertical hydraulic cylinder (100), and the anti-tipping plate (200) has a tilting line (290). The outrigger seat (300) has a receiving cavity (310), and the anti-tipping plate (200) is located in the receiving cavity (310). The outrigger seat (300) has a center line (320). The outrigger seat (300) moves between an extended position and a retracted position. When the outrigger seat (300) is in the retracted position, the anti-tipping plate (200) abuts against the top wall (311) of the receiving cavity (310). During the movement of the outrigger seat (300), the distance between the center line (320) and the central axis (130) is always less than or equal to the distance between the tipping line (290) and the central axis (130).

2. The outrigger assembly according to claim 1, characterized in that, The center line (320) is located between the two ends of the anti-tipping plate (200) in the direction of movement of the support leg (300); And / or, the leg assembly (1) further includes a bracket (400), and the leg seat (300) is located in the storage position and is fixedly connected to the bracket (400).

3. The outrigger assembly according to claim 1, characterized in that, The anti-tipping plate (200) includes: The plate (210) is connected to the vertical hydraulic cylinder (100); A rotating shaft (230) is connected to the plate (210), and the axial direction of the rotating shaft (230), the axial direction of the vertical cylinder (100), and the moving direction of the support leg (300) are arranged perpendicularly to each other. A roller (220) is rotatably mounted on the pivot (230), the support leg (300) is located in the storage position, and the roller (220) abuts against the top wall (311).

4. The outrigger assembly according to claim 3, characterized in that, The vertical cylinder (100) includes a drive rod (110) and a ball head (120). The lower end of the drive rod (110) is connected to the ball head (120), and the upper surface of the ball head (120) extends beyond the outer circumference of the drive rod (110) to form a support surface (121). The plate (210) is provided with a through hole (260), the drive rod (110) passes through the through hole (260), the plate (210) abuts against the support surface (121), and the roller (220) is spaced apart from the vertical cylinder (100).

5. The outrigger assembly according to claim 4, characterized in that, The plate (210) includes a first plate (211) and a second plate (212), the pivot (230) passes through the first plate (211) and the second plate (212), the first plate (211) and the second plate (212) define the through hole (260), and the first plate (211) and the second plate (212) both abut against the support surface (121).

6. The outrigger assembly according to claim 4, characterized in that, The plate (210) has a first end (215) and a second end (216), the first end (215) and the second end (216) being arranged opposite to each other along the moving direction of the support leg (300); The support leg (300) is located in the extended position, the distance between the first end (215) and the center line (320) of the support leg (300) is L1, the support leg (300) is located in the retracted position, the distance between the second end (216) and the center line (320) of the support leg (300) is L2, and L1 > L2; The distance between the first end (215) and the central axis (130) of the vertical cylinder (100) is L3, and the distance between the second end (216) and the central axis (130) of the vertical cylinder (100) is L4, where L3 > L4.

7. The outrigger assembly according to claim 6, characterized in that, The anti-tipping plate (200) also includes: A support protrusion (250) is provided at the first end (215). The support protrusion (250) extends beyond the upper surface of the plate (210). The support leg seat (300) is located in the storage position. The support protrusion (250) abuts against the top wall (311).

8. The outrigger assembly according to claim 3, characterized in that, The plate (210) includes: The thickened portion (213) is provided with a pivot hole (280) and a mounting hole (270). The mounting hole (270) extends through opposite sides in the thickness direction of the thickened portion (213) and through opposite sides in the width direction of the thickened portion (213). The pivot (230) passes through the pivot hole (280), and the roller (220) passes through the mounting hole (270). The flat plate portion (214) is connected to the thickened portion (213), the thickness of which is greater than the thickness of the flat plate portion (214).

9. The outrigger assembly according to any one of claims 1-8, characterized in that, The anti-tipping plate (200) is provided with weight reduction holes (240), which penetrate through the opposite sides of the anti-tipping plate (200) in the thickness direction.

10. An engineering machinery, characterized in that, Includes the outrigger assembly (1) as described in any one of claims 1-9.

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