Construction machine support leg arrangement, method for designing a construction machine support leg arrangement and construction machine

Abstract

The application belongs to the technical field of engineering machinery design, and particularly relates to an engineering machinery outrigger device, a design method thereof and engineering machinery. The engineering machinery outrigger device comprises an outrigger body, an outrigger cylinder, a rotating tripod and a floating support frame. The rotating tripod is driven to rotate by the outrigger cylinder to realize the switching of the stowed state, the ground-touching state and the ground-supporting state. The engineering machinery outrigger device plays a supporting role when it is in the ground-supporting state. In the application, a plurality of design boundary lines are preset according to the whole vehicle parameters of the engineering machinery. The structure size and the movement track of the engineering machinery outrigger device are designed to be as close as possible to the design boundary lines to obtain the hinge point size diagram of the rotating tripod and the fixed position of the mounting hinge hole center point of the outrigger cylinder closest to the design boundary lines, so that the engineering machinery outrigger device does not break through the limitation of the design boundary lines in the state switching process, and can play the maximum supporting role in the ground-supporting state.

Description

Technical Field

[0001] This application belongs to the technical field of engineering machinery design, specifically relating to an outrigger device for engineering machinery, its design method, and engineering machinery. Background Technology

[0002] Outriggers are an important component of construction machinery, used to enhance stability and safety during operation. Current design methods for outriggers in construction machinery often employ benchmarking, which frequently fails to maximize their supporting capabilities. Therefore, a design method that allows outriggers to achieve their full supporting potential is lacking. Summary of the Invention

[0003] The purpose of this application is to provide an outrigger device for construction machinery, its design method, and the construction machinery thereof, with the aim of maximizing the supporting effect of the outrigger device for construction machinery.

[0004] To achieve the above objectives, this application provides a design method for an outrigger device for engineering machinery. The outrigger device includes an outrigger body, an outrigger cylinder, a rotating triangular frame, and a floating support frame. The rotating triangular frame has a first hinge hole for pivotally connecting with the outrigger body, a second hinge hole for pivotally connecting with the floating support frame, and a third hinge hole for pivotally connecting with one end of the outrigger cylinder. The outrigger body has a mounting hinge hole for pivotally connecting with the other end of the outrigger cylinder. The design method includes:

[0005] The fixed position of the center point of the first hinge hole of the rotating tripod is determined according to the preset design boundary line;

[0006] The ground support position of the center point of the second hinge hole of the rotating tripod is determined based on the fixed position of the design boundary line and the center point of the first hinge hole;

[0007] The ground support position of the center point of the third hinge hole of the rotating tripod is determined based on the fixed position of the center point of the first hinge hole and the ground support position of the center point of the second hinge hole.

[0008] The fixed position of the mounting hinge hole center point of the outrigger body is determined based on the fixed position of the center point of the first hinge hole and the ground support position of the center point of the third hinge hole.

[0009] In some embodiments, the design boundary line includes a first boundary line and a second boundary line. The first boundary line characterizes the outer width limit of the retracted outriggers, and the second boundary line characterizes the ground clearance of the retracted outriggers. Determining the fixed position of the center point of the first hinge hole of the rotating tripod according to the preset design boundary line includes:

[0010] The second diameter is determined based on the first diameter, where the first diameter is the diameter of the support pin that connects the first hinge hole and the support body.

[0011] Based on the second diameter, a first circle tangent to both the first boundary line and the second boundary line is determined, and the center of the first circle is fixedly positioned as the center point of the first hinge hole.

[0012] In some embodiments, the design boundary line includes a third boundary line and a fourth boundary line. The third boundary line characterizes the total width of the outrigger's contact with the ground, and the fourth boundary line characterizes the depth of the outrigger's downward penetration. Determining the ground support position of the center point of the second hinge hole of the rotating tripod based on the design boundary line and the fixed position of the center point of the first hinge hole includes:

[0013] The first distance is determined based on the depth of the outrigger's downward movement;

[0014] The ground contact position of the center point of the second hinge hole is determined based on the outrigger's downward depth and the third boundary line;

[0015] The first radius is determined based on the distance between the fixed position of the center point of the first hinge hole and the ground contact position of the center point of the second hinge hole, and a first circular arc is determined with the fixed position of the center point of the first hinge hole as the center and the first radius as the radius.

[0016] The point located on the first arc and spaced at the first distance from the fourth boundary line is determined as the support position of the center point of the second hinge hole.

[0017] In some embodiments, determining the ground contact position of the center point of the second hinge hole based on the outrigger's depth and the third boundary line includes:

[0018] The second distance is determined based on the depth of the outrigger's downward movement;

[0019] The point that is spaced from the third boundary line by the second distance and from the ground line by the first distance is determined as the ground contact position of the center point of the second hinge hole.

[0020] In some embodiments, determining the ground support position of the third hinge hole center point of the rotating tripod based on the fixed position of the center point of the first hinge hole and the ground support position of the center point of the second hinge hole includes:

[0021] The second radius is determined based on the first diameter, where the first diameter is the diameter of the support pin that connects the first hinge hole and the support body, and a second arc is determined with the fixed position of the center point of the first hinge hole as the center and the second radius as the radius.

[0022] Within a preset range, a design value for the first included angle is selected. The first included angle is the angle between the line connecting the center point of the first hinge hole and the center point of the third hinge hole and the line connecting the center point of the second hinge hole and the center point of the third hinge hole.

[0023] The point located on the second arc and whose first included angle is the design value is determined as the support position of the center point of the third hinge hole.

[0024] In some embodiments, determining the fixed position of the mounting hinge hole center point of the outrigger body based on the fixed position of the center point of the first hinge hole and the ground-supporting position of the center point of the third hinge hole includes:

[0025] The third diameter is determined based on the first diameter, where the first diameter is the diameter of the support pin that connects the first hinge hole and the support body, and a second circle is determined with the fixed position of the center point of the first hinge hole as the center and the third diameter as the diameter.

[0026] The retracted position of the center point of the third hinge hole is determined based on the ground support position of the center point of the third hinge hole;

[0027] Based on design experience, a fourth diameter is selected, and a third circle is determined with the retracted position of the center point of the third hinge hole as the center and the fourth diameter as the diameter.

[0028] The fixed position of the mounting hinge hole center point is determined by the intersection of the tangent of the second circle at the ground support position passing through the center point of the third hinge hole and the tangent of the third circle at the fixed position passing through the center point of the first hinge hole.

[0029] In some embodiments, after determining the ground support position of the third hinge hole center point of the rotating tripod based on the fixed position of the center point of the first hinge hole and the ground support position of the center point of the second hinge hole, the method further includes:

[0030] Verify the fixed position of the center point of the first hinge hole, the ground support position of the center point of the second hinge hole, and the ground support position of the center point of the third hinge hole;

[0031] If the fixed position of the center point of the first hinge hole, the ground support position of the center point of the second hinge hole, and the ground support position of the center point of the third hinge hole are all verified and passed, the following steps are performed: Determine the fixed position of the center point of the mounting hinge hole of the outrigger body based on the fixed position of the center point of the first hinge hole and the ground support position of the center point of the third hinge hole.

[0032] After determining the fixed position of the mounting hinge hole center point of the outrigger body based on the fixed position of the center point of the first hinge hole and the ground support position of the center point of the third hinge hole, the method further includes:

[0033] Verify the fixed position of the center point of the mounting hinge hole.

[0034] In some embodiments, the design boundary lines include a first boundary line and a fifth boundary line. The first boundary line characterizes the outward width limitation when the outriggers are retracted, and the fifth boundary line characterizes the ground clearance of the turntable. Verifying the fixed position of the center point of the first hinge hole, the ground support position of the center point of the second hinge hole, and the ground support position of the center point of the third hinge hole includes:

[0035] The retracted position of the center point of the second hinge hole is determined based on the ground support position of the center point of the second hinge hole;

[0036] Obtain the actual value of the third distance between the retracted position of the center point of the second hinge hole and the first boundary line, and the actual value of the fourth distance between the retracted position of the center point of the second hinge hole and the fifth boundary line;

[0037] The acceptable ranges for the third distance and the fourth distance are determined based on the outrigger depth.

[0038] The actual value of the third distance is determined to be within the acceptable range of the third distance and the actual value of the fourth distance is within the acceptable range of the fourth distance, so that the fixed position of the center point of the first hinge hole, the ground support position of the center point of the second hinge hole, and the ground support position of the center point of the third hinge hole pass the verification.

[0039] In some embodiments, checking the fixed position of the center point of the mounting hinge hole includes:

[0040] Obtain the actual value of the fifth distance between the fixed position of the center point of the mounting hinge hole and the center line of the outrigger device of the engineering machinery;

[0041] The qualified value range of the fifth distance is determined according to the fifth diameter, where the fifth diameter is the diameter of the support pin that connects the mounting hinge hole and the support body.

[0042] Determine that the actual value of the fifth distance conforms to the acceptable range of the fifth distance;

[0043] The retracted position of the center point of the third hinge hole is determined based on the ground support position of the center point of the third hinge hole;

[0044] The ground-supporting stroke of the outrigger cylinder is determined based on the distance between the fixed position of the center point of the mounting hinge hole and the ground-supporting position of the center point of the third hinge hole.

[0045] The retraction stroke of the outrigger cylinder is determined based on the distance between the fixed position of the center point of the mounting hinge hole and the retraction position of the center point of the third hinge hole.

[0046] Obtain the actual value of the ratio of the ground support stroke to the retraction stroke;

[0047] The acceptable range of the stroke ratio between the ground-supporting stroke and the retraction stroke is selected based on the structural limitations of the outrigger cylinder;

[0048] The actual value of the stroke ratio is determined to be within the acceptable range of the stroke ratio, so that the fixed position of the center point of the mounting hinge hole passes the verification.

[0049] A second aspect of this application provides an outrigger device for engineering machinery, including an outrigger body, an outrigger cylinder, a rotating triangular frame, and a floating support frame. The rotating triangular frame has a first hinge hole for pivotally connecting with the outrigger body, a second hinge hole for pivotally connecting with the floating support frame, and a third hinge hole for pivotally connecting with one end of the outrigger cylinder. The outrigger body has a mounting hinge hole for pivotally connecting with the other end of the outrigger cylinder. The fixed position of the center point of the first hinge hole of the rotating triangular frame, the ground-supporting position of the center point of the second hinge hole of the rotating triangular frame, the ground-supporting position of the center point of the third hinge hole of the rotating triangular frame, and the fixed position of the center point of the mounting hinge hole of the outrigger body are all determined according to the design method described above.

[0050] A third aspect of this application provides an engineering machine, including the outrigger device for engineering machines as described above.

[0051] Through the above technical solution, the outrigger device and its design method for engineering machinery provided in this application, as well as the engineering machinery, have the following beneficial effects:

[0052] The outrigger device for construction machinery includes an outrigger body, an outrigger cylinder, a rotating tripod, and a floating support frame. The first hinge hole of the rotating tripod is pivotally connected to the outrigger body, the second hinge hole of the rotating tripod is pivotally connected to the floating support frame, the third hinge hole of the rotating tripod is pivotally connected to one end of the outrigger cylinder, and the mounting hinge hole of the outrigger body is pivotally connected to the other end of the outrigger cylinder. In this application, each design boundary line can limit the structural dimensions and movement trajectory of the outrigger device for construction machinery. Under this limitation, the positions of each hinge hole of the rotating tripod closest to the design boundary line and the positions of the mounting hinge holes of the outrigger cylinder are obtained, so that the outrigger device for construction machinery will never exceed the limitations of the preset design boundary line during the state switching process, and can play a maximum supporting role in the ground-supporting state.

[0053] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0054] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings:

[0055] Figure 1 This is a step diagram illustrating the design method of the outrigger device for engineering machinery according to a specific embodiment of this application;

[0056] Figure 2 This is a structural schematic diagram of the outrigger device for construction machinery according to a specific embodiment of this application;

[0057] Figure 3 This is a schematic diagram of the retracted state of the outrigger device for construction machinery according to a specific embodiment of this application;

[0058] Figure 4 This is a schematic diagram of the ground-supporting state of the outrigger device of the construction machinery according to a specific embodiment of this application;

[0059] Figure 5 This is a first schematic diagram of vehicle parameters according to a specific embodiment of this application;

[0060] Figure 6 This is a second schematic diagram of vehicle parameters according to a specific embodiment of this application;

[0061] Figure 7 This is a schematic diagram illustrating the design of boundary lines according to a specific embodiment of this application;

[0062] Figure 8This is a schematic diagram of steps S1 and S2 according to a specific embodiment of this application;

[0063] Figure 9 This is a schematic diagram of steps S3 and S3' according to a specific embodiment of this application;

[0064] Figure 10 This is a schematic diagram of steps S4 and S4' according to a specific embodiment of this application.

[0065] Explanation of reference numerals in the attached figures

[0066] 1. First boundary line; 2. Second boundary line; 3. Third boundary line; 4. Fourth boundary line; 5. Fifth boundary line; 6. Center line of the outrigger device; 7. Ground line; 8. Rotating tripod; 9. Outrigger body; 91. Base plate; 10. Outrigger cylinder; 11. Floating support frame; M. Outrigger retraction width limit; P. Outrigger retraction ground clearance; K. Total outrigger contact width; L. Outrigger depth; N. Turntable ground clearance; A. Fixed position of the center point of the first hinge hole. A. Ground contact position of the center point of the second hinge hole; B. Ground support position of the center point of the second hinge hole; C. Ground support position of the center point of the third hinge hole; D. Ground support position of the center point of the third hinge hole; C'. Retracted position of the center point of the second hinge hole; D'. Retracted position of the center point of the third hinge hole; Y. Fixed position of the center point of the mounting hinge hole; α. First included angle; L2. First distance; L3. Second distance; L4. Third distance; L5. Fourth distance; L6. Fifth distance; Y1. Ground support stroke; Y2. Retracted stroke. Detailed Implementation

[0067] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0068] The following description, with reference to the accompanying drawings, outlines the outrigger device for engineering machinery, its design method, and the terminology for engineering machinery.

[0069] like Figure 1 As shown in the illustration, a specific embodiment of this application provides a design method for an outrigger device for engineering machinery, comprising:

[0070] Step S1: Determine the fixed position A of the center point of the first hinge hole of the rotating tripod 8 according to the preset design boundary line;

[0071] Step S2: Determine the ground support position C of the center point of the second hinge hole of the rotating tripod 8 according to the design boundary line and the fixed position A of the center point of the first hinge hole;

[0072] Step S3: Determine the ground support position D of the center point of the third hinge hole of the rotating tripod 8 based on the fixed position A of the center point of the first hinge hole and the ground support position C of the center point of the second hinge hole.

[0073] Step S4: Determine the fixed position Y of the mounting hinge hole center point of the outrigger body 9 based on the fixed position A of the center point of the first hinge hole and the ground support position D of the center point of the third hinge hole.

[0074] like Figures 2 to 4 As shown, the outrigger device for construction machinery includes an outrigger body 9, an outrigger cylinder 10, a rotating tripod 8, and a floating support frame 11. The rotating tripod 8 has a first hinge hole for pivotally connecting with the outrigger body 9, a second hinge hole for pivotally connecting with the floating support frame 11, and a third hinge hole for pivotally connecting with one end of the outrigger cylinder 10. The outrigger body 9 has a mounting hinge hole for pivotally connecting with the other end of the outrigger cylinder 10. The rotating tripod 8 is the core component of the outrigger device. The extension and retraction of the outrigger cylinder 10 drives the rotating tripod 8 to rotate, thereby switching between the retracted state, the ground-contact state, and the ground-supporting state. When the outrigger device is in the ground-supporting state, it provides support, thereby improving the stability of the construction machinery during operation. In the design process of outrigger devices for construction machinery, multiple design boundary lines are preset based on the overall vehicle parameters of the construction machinery. By designing the structural dimensions and movement trajectory of the outrigger devices as close as possible to each design boundary line, the positions of the hinge holes of the rotating triangular frame 8 and the positions and stroke dimensions of the mounting hinge holes of the outrigger body 9, which are closest to the design boundary lines, are obtained. This ensures that the outrigger devices for construction machinery do not exceed the limitations of the design boundary lines during state switching and can exert maximum support when on the ground.

[0075] like Figure 5 and Figure 6 As shown, specifically, the overall vehicle parameters of the construction machinery include the outrigger retraction width limit M, the outrigger retraction ground clearance P, the outrigger ground contact width K, the outrigger descent depth L, and the turntable ground clearance N. The outrigger retraction width limit M is used to limit the total width of the outrigger device when it is in the retracted state. The outrigger retraction ground clearance P is used to limit the distance between the outrigger device and the ground when it is in the retracted state. The outrigger ground contact width K is used to limit the total width of the outrigger device when it is in the ground contact state. The outrigger descent depth L is used to limit the descent height of the outrigger device when it switches from the ground contact state to the ground support state. The turntable ground clearance N is used to limit the distance between the outrigger device and the turntable ground when it is in the retracted state.

[0076] The aforementioned vehicle parameters were known from the initial design stage, which are the design constraints of the outrigger device for construction machinery. This application transforms these constraints into design boundary lines to ensure that the outrigger device for construction machinery has the maximum supporting effect under the given constraints.

[0077] In fact, the state switching of the outrigger device of construction machinery only involves positional changes along the left-right and up-down directions of the construction machinery, and does not involve positional changes along the front-back direction of the construction machinery. In other words, each point of the outrigger device of construction machinery can be projected onto a projection plane perpendicular to the straight line extending in the front-back direction. The positional changes of each point of the outrigger device along the left-right and up-back directions can be mapped by the positional changes of each point in the projection plane. It can be seen that by limiting the position and movement trajectory of the key points of the outrigger device of construction machinery in the projection plane, the structural dimensions and movement trajectory of the outrigger device of construction machinery can be limited.

[0078] Specifically, the positions of the points involved include the fixed position A of the center point of the first hinge hole, the retracted position C' of the center point of the second hinge hole, the ground support position C of the center point of the second hinge hole, the retracted position D' of the center point of the third hinge hole, the ground support position D of the center point of the third hinge hole, and the fixed position Y of the center point of the mounting hinge hole. As long as the positions of the above points are within the constraints determined by the design boundary line and as close as possible to the design boundary line, the outrigger device of the engineering machinery can achieve the maximum support function under the given constraints.

[0079] The positions of the center point of the first hinge hole and the center point of the mounting hinge hole remain unchanged, while the positions of the second hinge hole and the third hinge hole change with the state switching, having the retracted position, the ground contact position, and the ground support position respectively.

[0080] like Figure 7 and Figure 8 As shown, in some embodiments, the design boundary lines include a first boundary line 1 and a second boundary line 2. The first boundary line 1 is used to characterize the outrigger retraction width limit M, and the second boundary line 2 is used to characterize the outrigger retraction ground clearance P. Step S1 includes:

[0081] Step S11: Determine the second diameter based on the first diameter. The first diameter is the diameter of the support pin that connects the first hinge hole and the support body 9.

[0082] Step S12: Determine the first circle that is tangent to both the first boundary line 1 and the second boundary line 2 based on the second diameter, and determine the fixed position A of the center of the first circle as the center point of the first hinge hole.

[0083] Specifically, the rotatable connection between the rotating tripod 8 and the outrigger body 9 is achieved by the outrigger pin passing through the first hinge hole of the rotating tripod 8 and the outrigger body 9. The center point of the first hinge hole is the projection point of the center line of the first hinge hole in the projection plane. During the rotation of the rotating tripod 8, the corner points on the outer edge of the rotating tripod 8 will form a circular trajectory with the center point of the first hinge hole as the center. The corner point relatively close to the center point of the first hinge hole is called the first corner point. The circular trajectory of the first corner point affects the total width of the outrigger device of the construction machinery in the retracted state and the distance between it and the ground. In other words, as long as the circular trajectory of the first corner point is inside the first boundary line 1 and the second boundary line 2, the total width of the outrigger device of the construction machinery in the retracted state and the distance between it and the ground can conform to the vehicle parameters.

[0084] In this application, the second diameter is the distance from the first corner point to the center point of the first hinge hole, and the first circle is the circular trajectory of the first corner point. Based on the design experience of the rotating tripod 8, the second diameter needs to be more than twice the diameter of the first hinge hole. Considering manufacturing errors, the second diameter is at least 2.2 times the first diameter. Furthermore, the larger the second diameter, the larger the stroke dimension of the outrigger cylinder 10 needs to be. Considering the adaptability of the outrigger cylinder 10, the second diameter is at most 2.5 times the first diameter. It can be seen that this application takes into account both manufacturing errors and component adaptability during the design process, and has high reliability.

[0085] like Figure 7 and Figure 9 As shown, in some embodiments, the design boundary lines include a third boundary line 3 and a fourth boundary line 4. The third boundary line 3 is used to characterize the total ground contact width K of the outrigger, and the fourth boundary line 4 is used to characterize the outrigger's downward penetration depth L. Step S2 includes:

[0086] Step S21: Determine the first distance L2 based on the outrigger's downward depth L;

[0087] Step S22: Determine the ground contact position B of the center point of the second hinge hole based on the leg probing depth L and the third boundary line 3;

[0088] Step S23: Determine the first radius based on the distance between the fixed position A of the center point of the first hinge hole and the ground contact position B of the center point of the second hinge hole, and determine the first arc with the fixed position A of the center point of the first hinge hole as the center and the first radius as the radius;

[0089] Step S24: Determine the support position C of the point located on the first arc and separated from the fourth boundary line 4 by a first distance L2 as the center point of the second hinge hole.

[0090] In some implementations, step S22 includes:

[0091] The second distance L3 is determined based on the outrigger's downward depth L;

[0092] The point B, which is a second distance L3 away from the third boundary line 3 and a first distance L2 away from the ground line 7, is the ground contact position of the center point of the second hinge hole.

[0093] Specifically, the rotatable connection between the floating support bracket 11 and the rotating tripod 8 is achieved by the outrigger pin passing through the mounting hole of the floating support bracket 11 and the second hinge hole of the rotating tripod 8. The center point of the second hinge hole is the projection point of the center line of the second hinge hole in the projection plane. When in the ground contact state, the bottom of the floating support bracket 11 needs to be in contact with the ground. At the same time, the outer part of the floating support bracket 11 affects the total width of the outrigger device of the construction machinery in the ground contact state. In other words, as long as the outer part of the floating support bracket 11 is located inside the third boundary line 3 when the bottom of the floating support bracket 11 is in contact with the ground, the total width of the outrigger device of the construction machinery in the ground contact state can meet the vehicle parameters.

[0094] In fact, the position of the outer side of the floating support 11 when it is in the ground contact state is determined by the size of the floating support 11, which in turn is determined by the depth L of the outrigger. The size of the floating support 11 includes a first distance L2 and a second distance L3. The first distance L2 is the distance in the vertical direction between the center line of the mounting hole of the floating support 11 and the bottom of the floating support 11. The second distance L3 is the distance in the horizontal direction between the center line of the mounting hole of the floating support 11 and the outer side of the floating support 11. Since the center line of the second hinge hole coincides with the center line of the mounting hole of the floating support 11, the first distance L2 can be regarded as the distance in the vertical direction between the center point of the second hinge hole and the bottom of the floating support 11, and the second distance L3 can be regarded as the distance in the horizontal direction between the center point of the second hinge hole and the outer side of the floating support 11.

[0095] It can be seen that the distance between the center point of the second hinge hole and the ground line 7 reaches the first distance L2, which means that the bottom of the floating support 11 touches the ground. The distance between the center point of the second hinge hole and the third boundary line 3 reaches the second distance L3, which means that the total width of the outrigger device of the engineering machinery in the ground state just meets the parameters of the whole vehicle.

[0096] The floating support frame 11 is supported on the ground by the force applied by the outrigger cylinder 10. The smaller the first distance L2, the greater the downward force exerted by the outrigger cylinder 10 on the floating support frame 11, which reduces the stability of the outrigger device. Conversely, the larger the first distance L2, the greater the outward bending moment exerted by the outrigger cylinder 10 on the floating support frame 11, which causes the floating support frame 11 to rotate outward and reduces the stability of the outrigger device. In this application, based on design experience of the floating support frame 11, the first distance L2 is at least 0.8 times the outrigger depth L to avoid excessive downward force exerted by the outrigger cylinder 10 on the floating support frame 11, thereby improving the stability of the outrigger device. The second distance L3 is at most 1.3 times the outrigger depth L to avoid excessive outward bending moment exerted by the outrigger cylinder 10 on the floating support frame 11, thereby improving the stability of the outrigger device.

[0097] Those skilled in the art will understand that, based on design experience with the floating support 11, the first distance L2, in addition to satisfying the aforementioned proportional relationship with the leg's downward depth L, should be selected between 100mm and 130mm. Furthermore, the second distance L3 should be at least 0.7 times and at most 1.1 times the first distance L2. Also, based on design experience with the floating support 11, the second distance L3 should be a smaller value within the structurally permissible range.

[0098] It should also be noted that during the rotation of the tripod 8, the center point of the second hinge hole moves from the ground contact position to the ground support position. Its movement trajectory is the first arc. It can be seen that a certain point on the first arc that is at a distance of the outrigger's downward depth L from the fourth boundary line 4 and is relatively close to the ground contact position B of the center point of the second hinge hole is the ground support position C of the center point of the second hinge hole. The entire determination process conforms to the vehicle parameters and the movement trajectory of the outrigger device of the engineering machinery, and has high reliability.

[0099] like Figure 9 As shown, in some embodiments, step S3 includes:

[0100] Step S31: Determine the second radius based on the first diameter. The first diameter is the diameter of the support pin that connects the first hinge hole and the support body 9. Determine the second arc with the fixed position A of the center point of the first hinge hole as the center and the second radius as the radius.

[0101] Step S32: Select the design value of the first included angle α within the preset range. The first included angle α is the angle between the line connecting the center point of the first hinge hole and the center point of the third hinge hole and the line connecting the center point of the second hinge hole and the center point of the third hinge hole.

[0102] Step S33: Determine the support position D of the point located on the second arc and where the first included angle α is the design value as the center point of the third hinge hole.

[0103] Specifically, the rotational connection between the outrigger cylinder 10 and the rotating tripod 8 is achieved by the outrigger pin passing through the mounting hole of the outrigger cylinder 10 and the third hinge hole of the rotating tripod 8. The center lines of the mounting hole and the third hinge hole of the outrigger cylinder 10 coincide, and the center point of the third hinge hole is the projection point of the center line of the third hinge hole in the projection plane. Since the center points of the first and second hinge holes of the rotating tripod 8 are already determined, the position of the center point of the third hinge hole can be determined by simply determining the distance between the center point of the third hinge hole and the center point of the first hinge hole, as well as the first included angle α, based on the design experience of the rotating tripod 8.

[0104] In this application, the second radius is the distance between the center point of the third hinge hole and the center point of the first hinge hole. Based on the design experience of the rotating tripod 8, considering manufacturing errors, the second radius is at least 1.1 times the second diameter. Furthermore, the larger the second radius, the larger the stroke size of the outrigger cylinder 10. Considering the adaptability of the outrigger cylinder 10, the second radius is at most 1.3 times the second diameter. It can be seen that this application takes into account both manufacturing errors and component adaptability during the design process, and has high reliability.

[0105] Those skilled in the art will understand that, based on the design experience of the rotating tripod 8, the preset range of the first included angle α is 92°~98°.

[0106] like Figure 10 As shown, in a specific embodiment of this application, the design method further includes step S3': verifying the fixed position A of the center point of the first hinge hole, the ground support position C of the center point of the second hinge hole, and the ground support position D of the center point of the third hinge hole.

[0107] It should be noted that step S3' is performed after step S3. If the fixed position A of the center point of the first hinge hole, the ground support position C of the center point of the second hinge hole, and the ground support position D of the center point of the third hinge hole pass the verification after step S3', then step S4 is performed. If the fixed position A of the center point of the first hinge hole, the ground support position C of the center point of the second hinge hole, and the ground support position D of the center point of the third hinge hole fail the verification after step S3', then step S1 and / or step S2 and / or step S3 are repeated and the values ​​of each parameter are adjusted.

[0108] In this application, steps S1, S2, and S3 are used to determine the fixed position A of the center point of the first hinge hole, the ground support position C of the center point of the second hinge hole, and the ground support position D of the center point of the third hinge hole. By connecting the fixed position A of the center point of the first hinge hole, the ground support position C of the center point of the second hinge hole, and the ground support position D of the center point of the third hinge hole, the hinge point dimension diagram of the rotating tripod 8 in the ground support state is completed. However, obtaining only the hinge point dimension diagram of the rotating tripod 8 in the ground support state does not mean that the design of the rotating tripod 8 conforms to the preset design boundary line. It is also necessary to verify whether the hinge point dimension diagram of the rotating tripod 8 in the retracted state conforms to the preset design boundary line in order to improve the reliability of the design method.

[0109] like Figure 7 and Figure 9 As shown, in some embodiments, the design boundary lines include a first boundary line 1 and a fifth boundary line 5. The first boundary line 1 is used to characterize the outrigger retraction width limit M, and the fifth boundary line 5 is used to characterize the turntable ground clearance N. Step S3' includes:

[0110] Step S31': Determine the retraction position C' of the center point of the second hinge hole based on the ground support position C of the center point of the second hinge hole;

[0111] Step S32': Obtain the actual value of the third distance L4 between the retracted position C' of the center point of the second hinge hole and the first boundary line 1, and the actual value of the fourth distance L5 between the retracted position C' of the center point of the second hinge hole and the fifth boundary line 5;

[0112] Step S33': Determine the acceptable range of the third distance L4 and the acceptable range of the fourth distance L5 based on the outrigger probing depth L;

[0113] Step S34': Determine that the actual value of the third distance L4 meets the acceptable value range of the third distance L4 and the actual value of the fourth distance L5 meets the acceptable value range of the fourth distance L5, so that the fixed position A of the center point of the first hinge hole, the ground support position C of the center point of the second hinge hole and the ground support position D of the center point of the third hinge hole pass the verification.

[0114] Specifically, the point on the first arc closest to the fifth boundary line 5 is the retracted position C' of the center point of the second hinge hole. When in the retracted state, the floating support 11 will flip outward under the action of gravity, causing the bottom of the floating support 11 to face outward and the outer side of the floating support 11 to face upward. That is, the outer side of the floating support 11 needs to be located below the turntable of the engineering machinery, and the bottom of the floating support 11 cannot exceed the outer width limit M of the retracted legs.

[0115] In this application, the acceptable value of the third distance L4 is at least the same as the outrigger's depth L. Considering manufacturing errors, the acceptable value of the third distance L4 is at most 1.1 times the outrigger's depth L. The acceptable value of the fourth distance L5 is the second distance L3 plus a first constant determined according to the specifications of the engineering machinery. The value of the first constant ranges from 25mm to 40mm. The smaller the specifications of the engineering machinery, the smaller the value of the first constant, and vice versa. The setting of the first constant ensures sufficient clearance between the floating support 11 and the turntable to avoid mutual friction between them. Therefore, this application takes into account both manufacturing errors and component compatibility during the design process, exhibiting high reliability.

[0116] In this application, after verification in step S3', the hinge point dimension diagrams of the rotating triangular frame 8 in the ground-supported state and the rotating triangular frame 8 in the retracted state are both within the range defined by the first boundary line 1, the second boundary line 2, the third boundary line 3, the fourth boundary line 4, and the fifth boundary line 5. In other words, the design of the rotating triangular frame 8 conforms to the vehicle parameters. It can be seen that this application not only provides a design method but also verifies the design to improve the reliability of the design method.

[0117] like Figure 10 As shown, in some embodiments, step S4 includes:

[0118] Step S41: Determine the third diameter based on the first diameter. The first diameter is the diameter of the support pin that connects the first hinge hole and the support body 9. Determine the second circle with the fixed position A of the center point of the first hinge hole as the center and the third diameter as the diameter.

[0119] Step S42: Determine the retraction position D' of the center point of the third hinge hole based on the ground support position D of the center point of the third hinge hole;

[0120] Step S43: Select the fourth diameter based on design experience, and determine the third circle with the retracted position D' of the center point of the third hinge hole as the center and the fourth diameter as the diameter;

[0121] Step S44: Determine the fixed position Y of the installation hinge hole center point as the intersection of the tangent of the second circle at the ground support position D passing through the center point of the third hinge hole and the tangent of the third circle at the fixed position A passing through the center point of the first hinge hole.

[0122] Specifically, the outrigger cylinder 10 has a first mounting hole at one end for pivotal connection with the mounting hinge hole of the outrigger body 9, and a second mounting hole at the other end for pivotal connection with the second hinge hole of the rotating tripod 8. In other words, the projection of the center line of the first mounting hole onto the projection plane can be considered as the center point of the mounting hinge hole, and the projection of the center line of the second mounting hole onto the projection plane can be considered as the center point of the second hinge hole. During extension and retraction, the outrigger cylinder 10 needs to avoid interference with the rotating tripod 8. The first corner point of the rotating tripod 8 is most likely to interfere with the outrigger cylinder 10. The first circle represents the movement path of the first corner point during the rotation of the rotating tripod 8, and the projection of the center line of the outrigger cylinder 10 onto the projection plane is the line connecting the center point of the mounting hinge hole and the center point of the second hinge hole. In other words, as long as the line connecting the center point of the mounting hinge hole and the center point of the second hinge hole does not overlap with the first circle, interference between the outrigger cylinder 10 and the rotating tripod 8 during extension and retraction can be avoided.

[0123] In this application, since the outrigger cylinder 10 itself has structural dimensions and is not merely a straight line without width, the second diameter is enlarged to obtain a third diameter. A second circle is determined based on the third diameter to replace the first circle. Considering manufacturing errors, the third diameter is at least 1.2 times the second diameter. Furthermore, the larger the third diameter, the larger the stroke dimension of the outrigger cylinder 10 needs to be. Considering the adaptability of the outrigger cylinder 10, the third diameter is at most 1.4 times the second diameter. Moreover, the third diameter also needs to be greater than the second diameter plus a second constant determined according to the specifications of the outrigger cylinder 10, where the second constant is the piston rod radius of the outrigger cylinder 10. Therefore, this application balances manufacturing errors and component adaptability in its design process, exhibiting high reliability.

[0124] Since the outrigger cylinder 10 is installed inside the outrigger body 9, it must avoid interference with both the rotating tripod 8 and the base plate 91 of the outrigger body 9 during its extension and retraction. The most likely point of interference between the outrigger cylinder 10 and the base plate 91 is when the outrigger cylinder 10 is retracted to its shortest position and moved to its lowest point. At this time, the center point of the second hinge hole is in the retracted position C'. During the installation of the outrigger cylinder 10, the line connecting the fixed position Y of the hinge hole center point and the fixed position A of the first hinge hole center point must be located above the projection of the base plate 91 of the outrigger body 9 in the projection plane. In other words, if the outrigger cylinder 10 does not interfere with the line connecting the fixed position Y of the hinge hole center point and the fixed position A of the first hinge hole center point, then the outrigger cylinder 10 will not interfere with the base plate 91 of the outrigger body 9.

[0125] In this application, interference between the outrigger cylinder 10 and the base plate 91 of the outrigger body 9 is avoided by limiting the retracted position C' of the second hinge hole center point to be above the line connecting the fixed position Y of the mounting hinge hole center point and the fixed position A of the first hinge hole center point. At the same time, considering manufacturing errors and that the outrigger cylinder 10 has structural dimensions and is not just a straight line without width, a fourth diameter is set to improve the reliability of the design method. Furthermore, setting a fourth diameter can also prevent the fixed position Y of the mounting hinge hole center point, the fixed position A of the first hinge hole center point, and the retracted position C' of the second hinge hole center point from being collinear, so as to avoid affecting the outrigger cylinder 10 from failing to work. The value of the fourth diameter is not less than 40mm.

[0126] In a specific embodiment of this application, the design method includes step S4': verifying the fixed position Y of the center point of the mounting hinge hole.

[0127] It should be noted that step S4' is performed after step S4. If the fixed position Y of the center point of the hinge hole fails to pass the check after step S3', then step S1 and / or step S2 and / or step S3 and / or step S4 are repeated and the values ​​of each parameter are adjusted.

[0128] like Figure 10 As shown, in some embodiments, step S4' includes:

[0129] Step S41': Obtain the actual value of the fifth distance L6 between the fixed position Y of the center point of the mounting hinge hole and the center line 6 of the outrigger device of the engineering machinery;

[0130] Step S42': Determine the acceptable range of the fifth distance L6 based on the fifth diameter, where the fifth diameter is the diameter of the support pin that connects the hinge hole to the support body 9.

[0131] Step S43': Determine that the actual value of the fifth distance L6 conforms to the acceptable range of the fifth distance L6;

[0132] Step S44': Determine the retraction position D' of the center point of the third hinge hole based on the ground support position D of the center point of the third hinge hole;

[0133] Step S45': Determine the ground support stroke Y1 of the outrigger cylinder 10 based on the distance between the fixed position Y of the center point of the mounting hinge hole and the ground support position D of the center point of the third hinge hole;

[0134] Step S46': Determine the retraction stroke Y2 of the outrigger cylinder 10 based on the distance between the fixed position Y of the center point of the mounting hinge hole and the retraction position D' of the center point of the third hinge hole.

[0135] Step S47': Obtain the actual value of the stroke ratio between the ground support stroke Y1 and the retraction stroke Y2;

[0136] Step S48': Select the acceptable range of stroke ratio between the ground support stroke Y1 and the retraction stroke Y2 according to the structural limitations of the outrigger cylinder 10;

[0137] Step S49': Determine that the actual value of the stroke ratio meets the acceptable range of the stroke ratio so that the stroke dimension of the outrigger cylinder 10 passes the verification.

[0138] Since the mounting hinge holes of the outrigger body 9 are connected to the outrigger cylinders 10 through outrigger pins, the outrigger device of the construction machinery includes two outrigger cylinders 10 symmetrically arranged in the left-right direction. In other words, the outrigger body 9 has two mounting hinge holes. Therefore, by verifying the distance between the fixed position Y of the center point of the mounting hinge hole and the preset center line of the construction machinery outrigger device, it is ensured that both outrigger cylinders 10 can be connected to the outrigger body 9, and that the two mounting hinge holes do not overlap, and that the two outrigger cylinders 10 do not interfere with each other. Furthermore, since the stroke size of the conventional outrigger cylinder 10 is limited, the ground-supporting stroke Y1, the retraction stroke Y2, and the stroke ratio of the outrigger cylinder 10 are checked to verify whether the designed outrigger cylinder 10 has a compatible conventional model of outrigger cylinder 10.

[0139] Only when both of the above verifications are passed can it be said that the fixed position Y of the center point of the mounting hinge hole has been verified. It can be seen that the design method of this application not only takes into account the rationality of the hole opening and the actual assembly process, but also the commonness of the actual required product specifications, thereby improving the reliability of the design method.

[0140] Specifically, steps S41' to S43' verify the distance between the fixed position Y of the center point of the mounting hinge hole and the preset center line of the outrigger device. Steps S44' to S49' verify whether the designed outrigger cylinder 10 has a compatible conventional model. If the distance between the fixed position Y of the center point of the mounting hinge hole and the preset center line of the outrigger device passes the verification, then proceed to steps S44' to S49'. After verification by steps S44' to S49', if the designed outrigger cylinder 10 has a compatible conventional model, it means that the verification of the fixed position Y of the center point of the mounting hinge hole has passed. If either of the above two verifications fails, it means that the verification of the fixed position Y of the center point of the mounting hinge hole has failed, and then steps S1 and / or S2 and / or S3 and / or S4 are repeated and the values ​​of each parameter are adjusted.

[0141] It should be noted that step S44' is the same as step S42. When the outrigger cylinder 10 extends, it pushes the rotating tripod 8 to switch from the retracted state to the ground-supporting state. At this time, the axial length of the outrigger cylinder 10 is the ground-supporting stroke Y1, and its projection in the projection plane is the length of the line connecting the fixed position Y of the center point of the mounting hinge hole and the ground-supporting position D of the center point of the third hinge hole. When the outrigger cylinder 10 retracts, it pulls the rotating tripod 8 to switch from the ground-supporting state to the retracted state. At this time, the axial length of the outrigger cylinder 10 is the retraction stroke Y2, and its projection in the projection plane is the length of the line connecting the fixed position Y of the center point of the mounting hinge hole and the retracted position D' of the center point of the third hinge hole.

[0142] It should be noted that the acceptable range for the stroke ratio of the outrigger cylinder 10 is 1 to 1.5. A stroke ratio within the acceptable range makes it easier to select a suitable outrigger cylinder 10, thereby improving the reliability of the design method.

[0143] In this application, the rotating triangular frame 8, outrigger cylinder 10, and floating support frame 11 of the outrigger device for construction machinery are designed by using the design boundary line preset according to the parameters of the whole vehicle as a constraint, combined with design experience and the performance of components of conventional specifications. This is to enable the outrigger device of construction machinery to play a maximum supporting role, thereby maximizing the stability of the whole vehicle. At the same time, it makes the structural dimensions and assembly positions of each component of the outrigger device of construction machinery more reasonable, and avoids the situation that the lever arm of the outrigger cylinder 10 is too small and that the outrigger cylinder 10 cannot work after retracting, which greatly improves the reliability of the design method.

[0144] Those skilled in the art will understand that the outrigger device for construction machinery includes two outrigger assemblies symmetrically arranged in the left-right direction. Each outrigger assembly includes an outrigger cylinder 10, a rotating triangular frame 8, and a floating support frame 11. The outrigger body 9 is provided with mounting hinge holes symmetrically arranged in the left-right direction for mounting the outrigger cylinder 10. The design method provided in the specific embodiment of this application is illustrated by designing one set of outrigger assemblies as an example. The other set of outrigger assemblies can be designed symmetrically according to the design method.

[0145] A specific embodiment of this application also provides an outrigger device for engineering machinery, including an outrigger body 9, an outrigger cylinder 10, a rotating tripod 8, and a floating support frame 11. The rotating tripod 8 has a first hinge hole for pivotally connecting with the outrigger body 9, a second hinge hole for pivotally connecting with the floating support frame 11, and a third hinge hole for pivotally connecting with one end of the outrigger cylinder 10. The outrigger body 9 has a mounting hinge hole for pivotally connecting with the other end of the outrigger cylinder 10. The fixed position A of the center point of the first hinge hole of the rotating tripod 8, the ground-supporting position C of the center point of the second hinge hole of the rotating tripod 8, the ground-supporting position D of the center point of the third hinge hole of the rotating tripod 8, and the fixed position Y of the center point of the mounting hinge hole of the outrigger body 9 are all determined according to the above-described design method for an outrigger device for engineering machinery. Since the outrigger device for engineering machinery adopts all embodiments of the design method for an outrigger device for engineering machinery, it possesses all the beneficial effects brought about by the design method for an outrigger device for engineering machinery.

[0146] A specific embodiment of this application also provides an engineering machine, including the aforementioned engineering machine outrigger device. Since the engineering machine employs all embodiments of the engineering machine outrigger device, it possesses all the beneficial effects brought about by the engineering machine outrigger device.

[0147] The construction machinery mentioned in this application includes wheeled excavators, tracked excavators, wheeled cranes, etc.

[0148] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0149] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0150] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0151] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A design method for an outrigger device for engineering machinery, the outrigger device comprising an outrigger body (9), an outrigger cylinder (10), a rotating tripod (8), and a floating support frame (11), characterized in that, The rotating tripod (8) is provided with a first hinge hole for pivotal connection with the outrigger body (9), the rotating tripod (8) is provided with a second hinge hole for pivotal connection with the floating support frame (11), the rotating tripod (8) is provided with a third hinge hole for pivotal connection with one end of the outrigger cylinder (10), and the outrigger body (9) is provided with a mounting hinge hole for pivotal connection with the other end of the outrigger cylinder (10). The design method includes: The fixed position (A) of the center point of the first hinge hole of the rotating tripod (8) is determined according to the preset design boundary line. The ground support position (C) of the center point of the second hinge hole of the rotating tripod (8) is determined according to the fixed position (A) of the design boundary line and the center point of the first hinge hole. The ground support position (D) of the center point of the third hinge hole of the rotating tripod (8) is determined based on the fixed position (A) of the center point of the first hinge hole and the ground support position (C) of the center point of the second hinge hole. The fixed position (Y) of the mounting hinge hole center point of the outrigger body (9) is determined according to the fixed position (A) of the center point of the first hinge hole and the ground support position (D) of the center point of the third hinge hole. The design boundary line includes a first boundary line (1) and a second boundary line (2). The first boundary line (1) is used to characterize the outer width limit (M) of the outrigger when retracted, and the second boundary line (2) is used to characterize the ground clearance (P) of the outrigger when retracted. The step of determining the fixed position (A) of the center point of the first hinge hole of the rotating tripod (8) according to the preset design boundary line includes: The second diameter is determined based on the first diameter, where the first diameter is the diameter of the support pin that passes through the first hinge hole and the support body (9). Based on the second diameter, a first circle is determined that is tangent to both the first boundary line (1) and the second boundary line (2), and the center of the first circle is determined to be a fixed position (A) of the center point of the first hinge hole. Wherein, the second diameter is the distance from the first corner point to the center point of the first hinge hole, the first corner point is the corner point on the rotating tripod (8) that is relatively close to the center point of the first hinge hole, and the first circle is the circular trajectory formed by the first corner point with the center point of the first hinge hole as the center.

2. The design method of the outrigger device for engineering machinery according to claim 1, characterized in that, The design boundary line includes a third boundary line (3) and a fourth boundary line (4). The third boundary line (3) is used to characterize the total width (K) of the outrigger contact with the ground, and the fourth boundary line (4) is used to characterize the depth (L) of the outrigger. The step of determining the ground support position (C) of the center point of the second hinge hole of the rotating tripod (8) based on the design boundary line and the fixed position (A) of the center point of the first hinge hole includes: The first distance (L2) is determined based on the outrigger's downward depth (L); The ground contact position (B) of the center point of the second hinge hole is determined based on the leg probing depth (L) and the third boundary line (3); The first radius is determined based on the distance between the fixed position (A) of the center point of the first hinge hole and the ground contact position (B) of the center point of the second hinge hole, and a first circular arc is determined with the fixed position (A) of the center point of the first hinge hole as the center and the first radius as the radius. The point located on the first arc and spaced apart from the fourth boundary line (4) by the first distance (L2) is determined as the support position (C) of the center point of the second hinge hole. Wherein, the first distance (L2) is the distance in the vertical direction between the center line of the mounting hole of the floating support (11) and the bottom of the floating support (11).

3. The design method for the outrigger device of engineering machinery according to claim 2, characterized in that, The step of determining the ground contact position (B) of the center point of the second hinge hole based on the leg protrusion depth (L) and the third boundary line (3) includes: The second distance (L3) is determined based on the outrigger's downward probing depth (L); The point that is separated from the third boundary line (3) by the second distance (L3) and separated from the ground line (7) by the first distance (L2) is determined as the contact position (B) of the center point of the second hinge hole; Wherein, the second distance (L3) is the distance in the left-right direction between the center line of the mounting hole of the floating support (11) and the outer side of the floating support (11).

4. The design method of the outrigger device for engineering machinery according to claim 1, characterized in that, The step of determining the ground support position (D) of the third hinge hole center point of the rotating tripod (8) based on the fixed position (A) of the center point of the first hinge hole and the ground support position (C) of the center point of the second hinge hole includes: The second radius is determined based on the first diameter, where the first diameter is the diameter of the support pin that connects the first hinge hole and the support body (9), and a second arc is determined with the fixed position (A) of the center point of the first hinge hole as the center and the second radius as the radius. Within a preset range, a design value for the first included angle (α) is selected. The first included angle (α) is the angle between the line connecting the center point of the first hinge hole and the center point of the third hinge hole and the line connecting the center point of the second hinge hole and the center point of the third hinge hole. The support position (D) of the third hinge hole center point is determined by the point located on the second arc and where the first included angle (α) is the design value. Wherein, the second radius is the distance between the center point of the third hinge hole and the center point of the first hinge hole.

5. The design method of the outrigger device for engineering machinery according to claim 1, characterized in that, The step of determining the fixed position (Y) of the mounting hinge hole center point of the outrigger body (9) based on the fixed position (A) of the center point of the first hinge hole and the ground support position (D) of the center point of the third hinge hole includes: The third diameter is determined based on the first diameter, where the first diameter is the diameter of the support pin that connects the first hinge hole and the support body (9), and a second circle is determined with the fixed position (A) of the center point of the first hinge hole as the center and the third diameter as the diameter. The retracted position (D') of the center point of the third hinge hole is determined based on the ground support position (D) of the center point of the third hinge hole. Based on design experience, a fourth diameter is selected, and a third circle is determined with the retracted position (D') of the center point of the third hinge hole as the center and the fourth diameter as the diameter. The intersection of the tangent of the second circle at the ground support position (D) of the center point of the third hinge hole and the tangent of the third circle at the fixed position (A) of the center point of the first hinge hole is determined as the fixed position (Y) of the center point of the mounting hinge hole.

6. The design method of the outrigger device for engineering machinery according to claim 1, characterized in that, After determining the ground support position (D) of the third hinge hole center point of the rotating tripod (8) based on the fixed position (A) of the center point of the first hinge hole and the ground support position (C) of the center point of the second hinge hole, the method further includes: Verify the fixed position (A) of the center point of the first hinge hole, the ground support position (C) of the center point of the second hinge hole, and the ground support position (D) of the center point of the third hinge hole. If the fixed position (A) of the center point of the first hinge hole, the ground support position (C) of the center point of the second hinge hole, and the ground support position (D) of the center point of the third hinge hole are all verified and passed, the following steps are performed: Determine the fixed position (Y) of the center point of the mounting hinge hole of the outrigger body (9) based on the fixed position (A) of the center point of the first hinge hole and the ground support position (D) of the center point of the third hinge hole. After determining the fixed position (Y) of the mounting hinge hole center point of the outrigger body (9) based on the fixed position (A) of the center point of the first hinge hole and the ground support position (D) of the center point of the third hinge hole, the method further includes: Verify the fixed position (Y) of the center point of the mounting hinge hole.

7. The design method of the outrigger device for engineering machinery according to claim 6, characterized in that, The design boundary lines include a first boundary line (1) and a fifth boundary line (5). The first boundary line (1) is used to characterize the outward width limit (M) when the outrigger is retracted, and the fifth boundary line (5) is used to characterize the ground clearance (N) of the turntable. The verification of the fixed position (A) of the center point of the first hinge hole, the ground support position (C) of the center point of the second hinge hole, and the ground support position (D) of the center point of the third hinge hole includes: The retracted position (C') of the center point of the second hinge hole is determined according to the ground support position (C) of the center point of the second hinge hole; Obtain the actual value of the third distance (L4) between the retracted position (C') of the center point of the second hinge hole and the first boundary line (1), and the actual value of the fourth distance (L5) between the retracted position (C') of the center point of the second hinge hole and the fifth boundary line (5); The acceptable range of the third distance (L4) and the acceptable range of the fourth distance (L5) are determined based on the outrigger depth (L). The actual value of the third distance (L4) is determined to be within the acceptable range of the third distance (L4) and the actual value of the fourth distance (L5) is within the acceptable range of the fourth distance (L5), so that the fixed position (A) of the center point of the first hinge hole, the ground support position (C) of the center point of the second hinge hole and the ground support position (D) of the center point of the third hinge hole are verified to be acceptable.

8. The design method of the outrigger device for engineering machinery according to claim 6, characterized in that, The verification of the fixed position (Y) of the center point of the mounting hinge hole includes: Obtain the actual value of the fifth distance (L6) between the fixed position (Y) of the center point of the mounting hinge hole and the center line (6) of the outrigger device of the engineering machinery; The qualified value range of the fifth distance (L6) is determined according to the fifth diameter, wherein the fifth diameter is the diameter of the support pin that passes through the mounting hinge hole and the support body (9); Determine that the actual value of the fifth distance (L6) conforms to the acceptable range of the fifth distance (L6); and, The retracted position (D') of the center point of the third hinge hole is determined based on the ground support position (D) of the center point of the third hinge hole. The ground-supporting stroke (Y1) of the outrigger cylinder (10) is determined based on the distance between the fixed position (Y) of the center point of the mounting hinge hole and the ground-supporting position (D) of the center point of the third hinge hole. The retraction stroke (Y2) of the outrigger cylinder (10) is determined based on the distance between the fixed position (Y) of the center point of the mounting hinge hole and the retracted position (D') of the center point of the third hinge hole. Obtain the actual value of the stroke ratio between the ground support stroke (Y1) and the retraction stroke (Y2); The acceptable range of the stroke ratio between the ground support stroke (Y1) and the retraction stroke (Y2) is selected based on the structural limitations of the outrigger cylinder (10); Determine that the actual value of the stroke ratio meets the acceptable range of the stroke ratio so that the fixed position (Y) of the center point of the mounting hinge hole passes the verification.

9. A support leg device for engineering machinery, comprising a support leg body (9), a support leg cylinder (10), a rotating tripod (8), and a floating support frame (11), characterized in that, The rotating tripod (8) is provided with a first hinge hole for pivotally connecting with the outrigger body (9), the rotating tripod (8) is provided with a second hinge hole for pivotally connecting with the floating support frame (11), the rotating tripod (8) is provided with a third hinge hole for pivotally connecting with one end of the outrigger cylinder (10), and the outrigger body (9) is provided with a mounting hinge hole for pivotally connecting with the other end of the outrigger cylinder (10). The fixed position (A) of the center point of the first hinge hole of the rotating tripod (8), the ground support position (C) of the center point of the second hinge hole of the rotating tripod (8), the ground support position (D) of the center point of the third hinge hole of the rotating tripod (8), and the fixed position (Y) of the center point of the mounting hinge hole of the support leg body (9) are all determined according to the method of any one of claims 1 to 8.

10. An engineering machinery, characterized in that, Includes the outrigger device for engineering machinery as described in claim 9.

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