Double-landing-leg type frame landing leg structure and wheeled crane

Abstract

The invention discloses a double-landing-leg type frame landing leg structure and a wheeled crane. The double-landing-leg type frame landing leg structure comprises a second-stage telescopic landing leg, a first-stage telescopic landing leg, a landing leg hinge support and a pin shaft, the first-stage telescopic supporting legs serve as swing supporting legs, the four swing supporting legs form an X-shaped structure, the swing supporting legs are unfolded under the action of swing oil cylinders, the second-stage telescopic supporting legs stretch out of the first-stage telescopic supporting legs under the action of horizontal oil cylinders in the supporting legs, and the span of the supporting legs is increased. Or the four first-stage telescopic supporting legs form an H-shaped structure, the first-stage telescopic supporting legs and the second-stage telescopic supporting legs form two sections of telescopic movable supporting legs, the two sections of telescopic movable supporting legs stretch out and draw back under the action of horizontal oil cylinders in the supporting legs, and the span of the supporting legs is adjusted; the X-shaped structure supporting legs and the H-shaped structure supporting legs are arranged independently or simultaneously. Under different working conditions, different supporting leg forms are switched, and two working modes of an H-shaped supporting leg and an X-shaped supporting leg are achieved.

Description

Technical Field

[0001] The present invention relates to the field of cranes, and particularly to a frame outrigger structure in the form of double outriggers and a wheel crane. Background Art

[0002] Common forms of outriggers for wheel cranes are H-type outriggers and X-type outriggers. The form of the outriggers of a wheel crane is related to its lifting capacity. Generally, cranes with low lifting capacity use H-type outriggers, and cranes with high lifting capacity use X-type outriggers.

[0003] H-type outriggers: The outriggers extend and retract perpendicular to the vehicle body. According to the requirements of the lifting operation for the outrigger span, single-stage telescopic outriggers and double-stage telescopic outriggers can be designed. In the driving state, the outriggers are all retracted, and the total width does not exceed 3m required by road regulations. Advantages of H-type outriggers: Extending and retracting perpendicular to the vehicle body, the outriggers occupy less space during extension and retraction, and can be applied to more complex working environments. Disadvantages: Due to the 3m vehicle width limit of road regulations, the design of the maximum lateral span of the outriggers is restricted (the maximum lateral span of H-type outriggers in the current industry does not exceed 10m).

[0004] The prior art of H-type outriggers is like the patent "A Crane Outrigger and a Crane" (CN204490378U). Cranes with relatively small tonnage generally use H-type outriggers. The H-type outriggers extend and retract perpendicular to the vehicle body. When the outriggers are extended, they present an H shape. The outriggers can be made into double-stage. After the first-stage outriggers are extended, the second-stage outriggers then extend and retract to increase the outrigger span. Due to the restriction of the 3m vehicle width, the design of the outrigger lateral span is restricted, which restricts the improvement of the lifting capacity. Therefore, H-type outriggers are generally used for medium and small tonnage cranes.

[0005] X-type outriggers: During operation, the outriggers swing out around the root hinge points. In the driving state, the outriggers swing in and are parallel to the vehicle body. According to the requirements of the lifting operation for the outrigger span, single-stage telescopic outriggers and double-stage telescopic outriggers can be designed. In the driving state, the outriggers are all swung in, and the total width does not exceed 3m required by regulations. Advantages of X-type outriggers: The outriggers are parallel to the vehicle body and are not restricted by the 3m vehicle width. The outrigger lateral span can be made larger (the maximum lateral span of X-type outriggers in the current industry has reached 16m). Disadvantages: When the X-type outriggers swing out, they swing in an arc with the root hinge points as the center. There should be no foreign objects within the sector area swept by the outriggers. The required space is large, and the space requirements for the construction operation environment are high.

[0006] The prior art of X-type outriggers is like the patent "A Crane X-type Outrigger and a Crane Equipped with the Outrigger" (CN102431915B). Large tonnage cranes generally use X-type outriggers to increase the outrigger lateral span and improve the lifting capacity. The X-type outriggers are hinged to the vehicle frame through pin shafts. After the outriggers swing out and unfold, they present an X shape. The outriggers can be made into double-stage. After the outriggers swing out, they then extend and retract to increase the outrigger span.

[0007] With the rapid development of society and the continuous progress of technology, the demand for the lifting capacity of construction machinery wheeled cranes is increasing, and the application of X-type outriggers is becoming more and more widespread. Large-tonnage wheeled cranes with X-type outriggers are mainly used in major equipment construction fields such as wind power, petrochemical, and bridge construction. In different construction fields, the construction operation environments are different, and the spatial requirements for the construction operations of lifting equipment are also different. Taking the wind power construction and petrochemical construction fields as examples, wind power construction is mainly carried out in mountains, plains, deserts, etc., and the construction environment is relatively open. The space for the X-type outriggers to swing in and out is relatively abundant, and there are rarely situations where construction is restricted. In the petrochemical construction field, including equipment installation and maintenance, there are many pipe galleries and equipment around the construction environment, and the space is narrow. Wheeled cranes equipped with X-type outriggers often cannot construct due to the limited outrigger swing. Wheeled cranes equipped with H-type outriggers can smoothly extend the outriggers, but due to the small outrigger span, the lifting capacity cannot meet the construction requirements. The respective advantages and disadvantages of X-type outriggers and H-type outriggers bring certain troubles to users.

[0008] Therefore, it is necessary to develop a new type of frame outrigger structure specifically, which combines X-type outriggers and H-type outriggers and can be switched for use according to needs to meet the requirements of various situations. Summary of the Invention

[0009] Object of the Invention: Aiming at the deficiencies and defects of the prior art, the present invention provides a frame outrigger structure and a wheeled crane in the form of double outriggers. Under different operating conditions, different outrigger forms are switched to realize two operating modes of H-type outriggers and X-type outriggers, which can not only meet the construction requirements of large-tonnage wheeled cranes in narrow operating spaces (H-type outrigger mode), but also ensure that the outriggers can provide sufficient span support when higher lifting capacity construction operations are required (X-type outrigger mode).

[0010] Technical Solution: A frame outrigger structure in the form of double outriggers of the present invention is characterized in that it includes a secondary telescopic outrigger, a primary telescopic outrigger, an outrigger hinge support and a pin shaft; the primary telescopic outrigger serves as a swing outrigger, and 4 swing outriggers form an X-type structure. The swing outriggers are deployed under the action of a swing oil cylinder, and the secondary telescopic outrigger extends from the primary telescopic outrigger under the action of a horizontal oil cylinder inside the outrigger, realizing an increase in the outrigger span; or 4 of the primary telescopic outriggers form an H-type structure, and the primary telescopic outrigger and the secondary telescopic outrigger form a two-stage telescopic movable outrigger, which expands and contracts under the action of a horizontal oil cylinder inside the outrigger to adjust the outrigger span; the X-type structure outrigger and the H-type structure outrigger are provided separately or simultaneously.

[0011] Among them, in the X-type structure, the outrigger hinge support is connected to the frame hinge support at the upper slewing ring of the frame through a pin shaft.

[0012] Among them, the first-stage telescopic outrigger is provided with an upper reinforcing plate and a lower reinforcing plate near the outrigger hinge support, and an outer reinforcing plate is provided on the outer side of the web of the first-stage telescopic outrigger.

[0013] Among them, in the H-shaped structure, the first-stage telescopic outrigger is connected to the fixed outriggers at the front and rear sections of the vehicle frame through the internal horizontal oil cylinder of the outrigger.

[0014] Among them, the vehicle frame includes a front section of the vehicle frame, a front fixed outrigger, a vehicle frame hinge support, an upper hinge point, a lower hinge point, a slewing ring, a rear section of the vehicle frame and a rear fixed outrigger.

[0015] Among them, the front section of the vehicle frame is connected to the front fixed outrigger, and the rear section of the vehicle frame is connected to the rear fixed outrigger.

[0016] Among them, the vehicle frame hinge support is provided with an upper hinge point and a lower hinge point.

[0017] Among them, in the working condition where the working space is large enough and the requirement for lifting performance is relatively high, at this time, the outriggers will be installed at the vehicle frame hinge support of the slewing ring, and the outrigger form at this time is the X-shaped outrigger.

[0018] Among them, in the working condition where the working space is limited or the requirement for lifting capacity is not high, at this time, the outriggers are installed at the front fixed outrigger on the front section of the vehicle frame and the rear fixed outrigger on the rear section of the vehicle frame, and the outrigger form at this time is the H-shaped outrigger.

[0019] A wheel crane, characterized in that: the vehicle frame outrigger structure with the double outrigger form of the present invention is used.

[0020] Beneficial effects: Compared with the prior art, the present invention has the following remarkable advantages: The present invention switches different outrigger forms under different working conditions to realize two working modes of H-shaped outriggers and X-shaped outriggers, which can not only meet the construction requirements of large-tonnage wheel cranes in narrow working spaces (H-shaped outrigger mode), but also ensure that the outriggers can provide sufficient span support when high lifting capacity is required for construction operations (X-shaped outrigger mode). For the same crane, with two working modes, the coverage of the crane's construction working conditions is greatly improved, the purchase cost of users is saved, and the operation economy is improved; it is applicable to wheel cranes with large lifting capacity and limited working space; it solves the problem that large-tonnage wheel cranes can both meet the outrigger extension operation in narrow spaces and meet the requirements of high lifting capacity. Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of an H-shaped outrigger wheel crane in the prior art;

[0022] Figure 2 It is a schematic structural diagram of a single-stage H-shaped outrigger of an H-shaped outrigger wheel crane in the prior art;

[0023] Figure 3 Structural schematic diagram of the double-stage H-type outrigger of an H-type outrigger wheel crane of the prior art;

[0024] Figure 4 Structural schematic diagram of an X-type outrigger wheel crane of the prior art;

[0025] Figure 5 Structural schematic diagram of the single-stage H-type outrigger of an X-type outrigger wheel crane of the prior art;

[0026] Figure 6 Structural schematic diagram of the double-stage H-type outrigger of an X-type outrigger wheel crane of the prior art;

[0027] Figure 7 Structural schematic diagram of the present invention;

[0028] Figure 8 Structural schematic diagram of the outrigger of the present invention;

[0029] Figure 9 Structural schematic diagram of the vehicle frame of the present invention;

[0030] In the figure, 1 is the front section of the vehicle frame; 2 is the front fixed outrigger; 3 is the vehicle frame hinge support; 4 is the upper hinge point; 5 is the lower hinge point; 6 is the slewing bearing; 7 is the rear section of the vehicle frame; 8 is the rear fixed outrigger; 11 is the secondary telescopic outrigger; 12 is the primary telescopic outrigger; 13 is the outrigger hinge support; 14 is the pin shaft. Specific embodiments

[0031] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0032] The wheel crane of the present invention: a crane mounted on a common automobile chassis or a special chassis (a lifting machine that can perform multiple operations such as vertical lifting and horizontal handling within a certain range), which can move quickly and has good mobility. The outrigger: a structure that supports the entire crane above the ground and ensures the stability and safety of the lifting operation of the upper vehicle. The outrigger can provide a large support span for the crane during operation without increasing the width of the crane, thereby improving its lifting characteristics without reducing the mobility of the wheel crane.

[0033] The variable-form outrigger of the present invention:

[0034] Under the working conditions where the working space is large enough and the requirements for lifting performance are relatively high, at this time, the outrigger hinge support 13 on the outrigger is connected to the hinge support near the slewing bearing on the vehicle frame through the pin shaft 14. At this time, the form of the outrigger is Figure 7The X-type outrigger form shown by the solid line. The swing outrigger 12 is deployed under the action of the swing oil cylinder, and at the same time, the secondary telescopic outrigger 11 extends out of the swing outrigger 12 under the action of the horizontal oil cylinder inside the outrigger, thus realizing an increase in the outrigger span and enhancing the lifting capacity and operating stability of the wheel crane. In this outrigger state, during high-load lifting operations, all loads act directly on the outriggers instead of passing through the vehicle frame. Although it can protect the chassis frame from damage, the load on the outriggers increases. To meet the requirements of the outrigger structural strength and ensure the safety of operations, upper and lower reinforcement plates are added near the outrigger hinge support 13 of the swing outrigger 12, and at the same time, outer reinforcement plates are also installed on the outer side of the web of the swing outrigger 12. The thickness of the reinforcement plates can be adjusted according to the lifting tonnage requirements. The thicker the reinforcement plates, the greater the improvement in the outrigger strength, but the weight of the outrigger also increases accordingly. When calculating the thickness of the reinforcement plates, the cooperation between this outrigger and the fixed outrigger on the vehicle frame should also be considered to meet the assembly requirements of another outrigger structure. After the operation is completed, the secondary telescopic outrigger 11 is fully retracted, and the swing outrigger 12 swings in under the drive of the swing oil cylinder, so that the crane can directly transfer and drive without disassembling the outriggers, improving the convenience of transferring the ultra-large tonnage wheel crane.

[0035] In the working conditions where the working space is limited or the requirements for the lifting capacity are not high, at this time, this outrigger structure is connected to the fixed outriggers at the front and rear sections of the vehicle frame through the horizontal oil cylinder inside the outrigger, and the outrigger form at this time is Figure 7 The H-type outrigger form shown by the dashed line. In this outrigger form, the swing outrigger 12 will be transformed into a primary telescopic outrigger, and together with the secondary telescopic outrigger 11, they form a two-stage telescopic movable outrigger, which expands and contracts under the action of the horizontal oil cylinder inside the outrigger to adjust the outrigger span to meet the requirements of the lifting operation. After the operation is completed, the two-stage movable outriggers are all retracted into the fixed outriggers on the vehicle frame, so that the crane can directly transfer and drive without disassembling the outriggers, improving the convenience of transferring the ultra-large tonnage wheel crane.

[0036] The vehicle frame structure of the present invention:

[0037] As Figure 9 shown is the vehicle frame structure used by the wheel crane with variable outrigger forms. This vehicle frame structure includes a front section 1 of the vehicle frame, a front fixed outrigger 2, a vehicle frame hinge support 3, an upper hinge point 4, a lower hinge point 5, a slewing ring 6, a rear section 7 of the vehicle frame, and a rear fixed outrigger 8.

[0038] In the working conditions where the working space is large enough and the requirements for the lifting performance are relatively high, at this time, the outriggers will be installed at the vehicle frame hinge support 3 near the slewing ring 6, and the outrigger form at this time is Figure 7The X-shaped outrigger form shown by the solid line. In this outrigger form, during high-load lifting operations, since the load acts on the outriggers, in addition to strengthening the frame structure near the slewing race, external and internal reinforcement plates are also added at the frame hinge support 3. The thickness of the reinforcement plates can be changed according to the strength requirements of the frame hinge support 3. In working conditions where the operating space is limited or the lifting capacity requirement is not high, at this time, the outriggers are installed at the front fixed outrigger 2 on the front section 1 of the frame and the rear fixed outrigger 8 on the rear section 7 of the frame. At this time, the outrigger form is Figure 7 The H-shaped outrigger form shown by the dashed line in the figure. In this outrigger form, the frame will bear part of the load during lifting operations. However, when this outrigger form is applied, the lifting weight is relatively small, and the impact on the frame is relatively low.

[0039] This frame structure takes into account the installation of both outrigger forms at the same time, which can not only improve the stability of the operation but also take into account the convenience of the operation, greatly improving the environmental adaptability of the wheel crane. Since in the case of a relatively large lifting weight, an articulated outrigger form will be adopted, and at this time, all the loads are borne by the outriggers, so the frame bears less load brought by the lifting weight during the daily operation process, and no additional strengthening is required for the frame. On the premise of ensuring reliability, compared with the frames of traditional large-tonnage wheel cranes, the lifting load-bearing part of this form of frame is stronger, and the frame performance is also improved.

[0040] Embodiment 1: One set of outriggers for one frame:

[0041] When the operating space is large enough and the lifting performance requirement is relatively high, the wheel crane adopts the X-shaped outrigger form shown by the solid line. The swing outrigger is hinged to the frame through the root pin. When necessary, the swing outrigger can be designed into a two-stage structure, and the telescoping can change the length of the outrigger, thereby increasing the span of the outrigger and improving the lifting performance and stability.

[0042] When the operating space is narrow or the lifting capacity requirement of the crane is not high, the wheel crane adopts the H-shaped outrigger form shown by the dashed line. The swing outrigger is installed inside the front and rear fixed outriggers of the frame, and the swing outrigger telescopes perpendicular to the vehicle body. When necessary, the swing outrigger can be designed into a two-stage structure, and the telescoping can change the length of the outrigger, thereby increasing the span of the outrigger and improving the lifting performance and stability.

[0043] For the above outrigger structure, whether it is used in the X-shaped outrigger form or the H-shaped outrigger form, after the operation is completed, it can be retracted, and the width does not exceed 3m required by the road regulations.

[0044] Embodiment 2: Two sets of outriggers for one frame:

[0045] The biggest difference between this solution and Solution 1 lies in the design of two sets of outrigger structures, both of which are installed on the vehicle frame. When the working space is large enough and the requirements for lifting performance are relatively high, the wheel crane adopts the X-type outrigger form shown by the solid line. When the working space is narrow or the requirements for the crane's lifting capacity are not high, the wheel crane adopts the H-type outrigger form shown by the dotted line. The advantage is that there is no need to disassemble and assemble the outriggers, and the outrigger form can be selected according to needs.

[0046] Through the innovative outrigger structure and vehicle frame structure, the present invention enables the wheel crane to adjust the outrigger form according to the working conditions, greatly improving the environmental adaptability and working condition coverage of the wheel crane.

[0047] The present invention enables a crane to achieve two outrigger forms; this wheel crane can change the outrigger form to adapt to different working environments, and compared with traditional wheel cranes, the environmental adaptability is greatly improved. There are two implementation schemes for the two outrigger forms, one outrigger set for one vehicle frame and two outrigger sets for one vehicle frame. The variable outrigger composed of swing outriggers, telescopic outriggers, and reinforcement plates, and the thickness of the reinforcement plates can be changed according to the outrigger strength requirements. Through the horizontal hydraulic cylinders inside the outriggers in combination with the hinge supports on the outriggers, the switching of the outrigger installation form is realized. The new vehicle frame structure composed of front and rear fixed outriggers and vehicle frame hinge supports can realize the installation of two forms of outriggers. Compared with the vehicle frames of traditional large-tonnage wheel cranes, the new vehicle frame structure has a stronger load-bearing part for lifting, and the performance of the vehicle frame is also improved.

[0048] Under different working conditions, the present invention switches different outrigger forms to achieve two operation modes of H-type outriggers and X-type outriggers, which can not only meet the needs of large-tonnage wheel cranes for construction operations in narrow working spaces (H-type outrigger mode), but also ensure that the outriggers can provide sufficient span support when high lifting capacity is required for construction operations (X-type outrigger mode). For the same crane, two operation modes greatly improve the coverage of the crane's construction working conditions, save the user's purchase cost of the crane, and improve the operation economy; it is applicable to wheel cranes with large lifting capacity and limited working space; it solves the problem that large-tonnage wheel cranes can both meet the requirements of outrigger extension operations in narrow spaces and meet the needs of high lifting capacity.

Claims

1. A frame leg structure in the form of a double leg, characterized in that: It includes secondary telescopic outriggers (11), primary telescopic outriggers (12), outrigger hinge supports (13) and pin shafts (14); the primary telescopic outriggers (12) serve as swing outriggers, and four swing outriggers form an X-shaped structure. The swing outriggers are deployed under the action of swing cylinders, and the secondary telescopic outriggers (11) extend from the primary telescopic outriggers (12) under the action of horizontal cylinders inside the outriggers, achieving an increase in the outrigger span; or four of the primary telescopic outriggers (12) form an H-shaped structure, and the primary telescopic outriggers (12) and the secondary telescopic outriggers (11) form two-stage telescopic movable outriggers, which are telescoped under the action of horizontal cylinders inside the outriggers to adjust the outrigger span; the X-shaped outriggers and the H-shaped outriggers are provided separately or simultaneously.

2. The frame leg structure in the form of a double leg according to claim 1, characterized in that: In the X-shaped structure, the outrigger hinge support (13) is connected to the frame hinge support (3) at the slewing ring (6) on the frame through a pin shaft (14).

3. The frame leg structure in the form of double legs according to claim 2, characterized in that: The primary telescopic outrigger (12) is provided with upper and lower reinforcing plates near the outrigger hinge support (13), and an outer reinforcing plate is provided on the outer side of the web of the primary telescopic outrigger (12).

4. The frame leg structure in the form of double legs according to claim 1, characterized in that: In the H-shaped structure, the primary telescopic outrigger (12) is connected to the fixed outriggers at the front and rear sections of the frame through horizontal cylinders inside the outriggers.

5. The frame leg structure in the form of double legs according to claim 2, characterized in that: The frame includes a front section of the frame (1), a front fixed outrigger (2), a frame hinge support (3), an upper hinge point (4), a lower hinge point (5), a slewing ring (6), a rear section of the frame (7) and a rear fixed outrigger (8).

6. The frame leg structure in the form of a double leg according to claim 1, characterized in that: The front section of the frame (1) is connected to the front fixed outrigger (2), and the rear section of the frame (7) is connected to the rear fixed outrigger (8).

7. The frame leg structure in the form of double legs according to claim 1, characterized in that: The frame hinge support (3) is provided with an upper hinge point (4) and a lower hinge point (5).

8. The frame leg structure in the form of double legs according to claim 1, characterized in that: Under the condition that the working space is large enough and the lifting performance requirements are relatively high, at this time the outriggers will be installed at the frame hinge support (3) of the slewing ring (6), and the outrigger form is an X-shaped outrigger at this time.

9. The frame leg structure in the form of double legs according to claim 1, characterized in that: Under the condition that the working space is limited or the requirements for the lifting capacity are not high, at this time the outriggers are installed at the front fixed outrigger (2) on the front section of the frame (1) and the rear fixed outrigger (8) on the rear section of the frame (7), and the outrigger form is an H-shaped outrigger at this time.

10. A wheeled crane, characterized in that: Use the frame outrigger structure with a double-outrigger form described in any one of claims 1-9.

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