Hinged type lengthened supporting leg, method and crane

Abstract

The invention discloses a hinged type lengthened supporting leg, a method and a crane, belongs to the field of mechanical engineering, and aims to solve the problem that the transverse span of an H-shaped two-stage supporting leg is limited. Comprising a supporting leg assembly, a supporting mechanism and a storage assembly. The supporting assembly comprises a first movable supporting leg, a second movable supporting leg connected to the end of the first movable supporting leg and a lengthened supporting leg detachably connected to the end of the second movable supporting leg. The supporting mechanism is connected to one end of the supporting leg assembly and comprises an oil cylinder installation section installed at the end of the second movable supporting leg or the lengthened supporting leg, a vertical oil cylinder connected to the oil cylinder installation section and a supporting foot connected to the power end of the vertical oil cylinder. The storage assembly is installed on the frame and comprises a storage box and a storage frame which are connected to the frame. The containing box is used for containing the retracted supporting leg assembly and the supporting mechanism, and the containing frame is used for containing the lengthened supporting leg. Through the combination of the movable supporting leg and the detachable lengthened supporting leg, the width limiting requirement of a vehicle can be met, and meanwhile the lifting performance is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of mechanical engineering, and particularly relates to a hinged lengthened support leg, a method and a crane. BACKGROUND

[0002] With the rapid development of hoisting industry, the hoisting performance of the crane is getting higher and higher. The movable support leg is a telescopic supporting device in the crane, and mainly functions to bear the weight of the crane and the hoisted goods. The transverse span is an important parameter for the design of the support leg of the crane, and directly affects the hoisting performance and the stability of the whole crane. In a large truck crane, when the hoisting weight is large or the arm length is long, a larger support leg span is needed to ensure the operation performance of the crane.

[0003] The H-shaped support leg is a structural form of the movable support leg, and the support leg is telescopic perpendicular to the vehicle frame. After the support leg is extended, it presents an H shape. During the driving of the vehicle, the movable support leg is fully retracted into the square box of the vehicle frame, and the total width is ensured to be not more than 3m as specified by the road regulations. This design is mainly to meet the compliance requirements of the normal driving of the vehicle on the road.

[0004] At present, most of the H-shaped support legs in the related technical field adopt a two-stage H-shaped support leg structure. Taking the two-stage telescopic support leg introduced in the patent US14165861 as an example, the support leg is also telescopic perpendicular to the vehicle body. Its working process is to first extend the first stage support leg, and then perform the telescopic operation of the second stage support leg after the first stage support leg is extended in place. Through this step-by-step telescopic mode, the purpose of increasing the support leg span is achieved.

[0005] However, the existing H-shaped two-stage support leg has the advantage of being telescopic perpendicular to the vehicle body, and can save the required space to a certain extent, but at the same time, it also faces a more prominent problem. Due to the hard limit of 3m vehicle width, the design of the support leg in the transverse span is greatly restricted. The transverse span of the support leg has a crucial influence on the hoisting capacity of the crane, and the limitation of the transverse span directly leads to the difficulty in effectively improving the hoisting capacity, which to a certain extent limits the application and development of this type of support leg in a wider hoisting scene. SUMMARY

[0006] The present application provides a hinged lengthened support leg, a method and a crane, which aims to solve the problem of limited transverse span of the H-shaped two-stage support leg. Through the combination of the movable support leg and the detachable lengthened support leg, the high performance requirement of the hoisting operation is realized. At the same time, the movable support leg and the lengthened support leg can be accommodated in the storage assembly, and the width limit requirement during the driving of the vehicle is met.

[0007] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: The first aspect of the present application provides a hinged extension outrigger, comprising: an outrigger assembly, the support assembly comprising a first movable outrigger, a second movable outrigger connected at the end of the first movable outrigger, and an extension outrigger detachably connected at the end of the second movable outrigger; a support mechanism connected at one end of the outrigger assembly, comprising a cylinder mounting joint mounted at the end of the second movable outrigger or the extension outrigger, a vertical oil cylinder connected to the cylinder mounting joint, and a support foot connected to the power end of the vertical oil cylinder; a storage assembly mounted on the frame, comprising a storage box and a storage rack connected to the frame respectively; the storage box is used to accommodate the retracted outrigger assembly and support mechanism, and the storage rack is used to accommodate the extension outrigger.

[0008] Optionally, the first movable outrigger is provided with a through opening at one end close to the second movable outrigger, and the first movable outrigger is inserted into the second movable outrigger through the through opening; three sides of the through opening are provided with reinforcing plates, and triangular notches are formed on the reinforcing plates on the sides; a plurality of limiting holes are formed on the first movable outrigger, and the second movable outrigger is limited by the limiting pins.

[0009] Optionally, the extension outrigger comprises an outrigger body, a first plug-in oil cylinder group and a second plug-in oil cylinder group connected in the outrigger body respectively, and a first outrigger pin shaft group and a second outrigger pin shaft group inserted into the outrigger body respectively; the first plug-in oil cylinder group is connected to the first outrigger pin shaft through a pressing plate.

[0010] Optionally, the extension outrigger is hinged to the cylinder mounting joint through the second plug-in oil cylinder group, or the second movable outrigger is hinged to the cylinder mounting joint through the second plug-in oil cylinder group.

[0011] Optionally, the cylinder mounting joint is provided with corresponding pin holes at the end close to the extension outrigger or the second movable outrigger, and the extension outrigger is connected to the second movable outrigger through the second outrigger pin shaft; the second plug-in oil cylinder group is connected to the second outrigger pin shaft through a pressing plate.

[0012] Optionally, the storage box is square, and an opening is formed on one side of the storage box which faces the outrigger assembly, and the opening is in communication with the outside.

[0013] Optionally, the storage rack is located on one side of the storage box, the storage rack is composed of more than one box structure, and the two ends of each box structure are in communication with the outside; the cross section of the inside of each box structure is larger than the extension outrigger, and the extension outrigger is accommodated in the inside of each box structure; the more than one box structure is arranged longitudinally.

[0014] Optionally, the lengthened support leg is in a stepped shape, and the cross-sectional area of the fitting end of the second movable support leg is the smallest.

[0015] The second aspect of the application provides a method for using the articulated lengthened support leg, comprising: When the crane is driving, the oil cylinder mounting section, the second movable support leg are sequentially retracted into the first movable support leg, the first movable support leg is retracted into the storage box, and the lengthened support leg is placed on the storage rack and moves with the vehicle; When the crane is working, the first movable support leg and the second movable support leg are extended to support the whole vehicle; When the working range of the crane is expanded, the lengthened support leg is placed in connection with the second movable support leg and the oil cylinder mounting section, the range of supporting the whole vehicle is extended, and after the work is completed, the lengthened support leg is disassembled and placed into the storage rack again, and the oil cylinder mounting section, the second movable support leg and the first movable support leg are retracted into the storage box, so that the vehicle width is less than 3M.

[0016] The third aspect of the application provides a crane comprising the articulated lengthened support leg of the first aspect.

[0017] Compared with the prior art, the application has the following beneficial effects: The application realizes the high performance requirement of the lifting work through the combination of the movable support leg and the detachable lengthened support leg, and the movable support leg and the lengthened support leg can be accommodated in the storage assembly, meeting the width limit requirement of the vehicle driving.

[0018] The application can provide two installation modes of the support leg according to the state of the crane, and the user can replace them according to the working condition, which is convenient and fast.

[0019] The application provides a vehicle-carrying mode of the lengthened support leg, and the storage and taking-out process of the lengthened support leg can be self-disassembly and assembly work within the range of the crane itself, without the need for additional equipment, which can effectively save the use cost of the customer. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural diagram of the articulated lengthened support leg of the application.

[0021] Figure 2 is a structural diagram of the lengthened support leg of the application.

[0022] Figure 3 is a structural diagram of the support mechanism of the application.

[0023] Figure 4 is an embodiment diagram of the first connection mode of the articulated lengthened support leg of the application.

[0024] Figure 5 is an embodiment diagram of the storage of the articulated lengthened support leg of the application.

[0025] Figure 6 This is an embodiment diagram of the second connection method of the articulated extended support leg of the present invention.

[0026] Figure 7 This is a schematic diagram of the structure of the articulated extended leg storage mechanism of the present invention.

[0027] Figure 8 This is a schematic diagram of the support leg connection in the existing technology.

[0028] Figure 9 This is a schematic diagram of the crane's overall support system in the existing technology.

[0029] Figure 10 This is a schematic diagram of the crane's overall support system in the existing technology.

[0030] In the diagram: 1-First movable support leg, 2-Second movable support leg, 3-Extended support leg, 4-Hydraulic cylinder mounting section, 5-Support leg body, 6-Support leg pin, 7-Pin hydraulic cylinder, 8-Pressure plate, 9-Mounting section body, 10-Vertical hydraulic cylinder, 11-Support leg, 12-Storage box, 13-Storage bracket. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0032] like Figures 8 to 10 The image shows a telescopic outrigger in the prior art, such as... Figure 10 As shown, after the outriggers retract, both the primary and secondary outriggers are housed within the chassis box, meeting the 3m width requirement stipulated by road regulations. However, since the outriggers extend and retract perpendicular to the vehicle body, the required space is limited, and the lateral span design of the outriggers is restricted by the vehicle width requirement, thus limiting the improvement of lifting capacity. Therefore, this invention designs a combination of movable outriggers and extended outriggers to solve the problems of vehicle width and lateral span limitations of the outriggers. Example

[0033] This embodiment provides a hinged extended support leg 3, including: a support leg assembly, a support mechanism, and a storage assembly; wherein, the support leg assembly, such as... Figure 1The first movable supporting leg 1, the second movable supporting leg 2 and the lengthened supporting leg 3 are shown; the second movable supporting leg 2 is connected to the end of the first movable supporting leg 1, and the lengthened supporting leg 3 is detachably connected to the end of the second movable supporting leg 2; the supporting mechanism is connected to one end of the supporting leg assembly and comprises an oil cylinder mounting section 4, a vertical oil cylinder 10 and a supporting foot 11; the oil cylinder mounting section 4 is mounted at the end of the second movable supporting leg 2 or the lengthened supporting leg 3, the vertical oil cylinder 10 is connected to the end of the oil cylinder mounting section 4, and the supporting foot 11 is connected to the end of the vertical oil cylinder 10; the storage assembly is mounted on the vehicle frame and comprises a storage box 12 and a storage rack 13; the storage box 12 and the storage rack 13 are both connected to the crane vehicle frame, the storage box 12 is used for accommodating the retracted supporting leg assembly and the supporting mechanism, and the storage rack 13 is used for accommodating the lengthened supporting leg 3. The combination of the movable supporting leg and the detachable lengthened supporting leg 3 can meet the high performance requirements of the lifting operation, and the movable supporting leg and the lengthened supporting leg 3 can be accommodated in the storage assembly to meet the width limit requirements during vehicle driving.

[0034] In some possible embodiments, as shown in the drawings, Figure 1 The first movable supporting leg 1 is provided with an opening near one end of the second movable supporting leg 2 and is inserted into the second movable supporting leg 2 through the opening; Three sides of the opening are provided with reinforcing plates, and triangular notches are formed in the reinforcing plates on the sides; A plurality of limiting holes are formed in the first movable supporting leg 1 for limiting the second movable supporting leg 2 by limiting pins.

[0035] In this embodiment, triangular notches are formed below two sides of the opening except the top side, and the opening finally forms a wedge-shaped opening structure with the wedge surface facing downward. The excess area of the top side can expand the contact area and better disperse stress when the opening is stressed, thereby improving the stress resistance of the structure. Meanwhile, the notches below do not affect the sliding connection performance of the first movable supporting leg 1 and the second movable supporting leg 2 after the opening is deformed under stress, thereby ensuring that the subsequent retraction is not limited.

[0036] In some possible embodiments, as shown in the drawings, Figure 2 The lengthened supporting leg 3 comprises a supporting leg body 5, a first pin oil cylinder 7 group, a second pin oil cylinder 7 group, a first supporting leg pin shaft 6 group and a second supporting leg pin shaft 6 group; the supporting leg body 5 is also a box-shaped structure, the first pin oil cylinder 7 group and the second pin oil cylinder 7 group are respectively connected to the two ends of the supporting leg body 5, and the first supporting leg pin shaft 6 group and the second supporting leg pin shaft 6 group are respectively inserted into the supporting leg body 5 and located at the two pin oil cylinders 7 groups; as shown in the drawings, Figure 2 The first pin oil cylinder 7 group is connected to the first supporting leg pin shaft 6 through a pressing plate 8.

[0037] After the first set of hydraulic cylinders 7 releases pressure, the piston drives the pressure plate 8 and the first leg pin 6 to move. This pushes the first leg pin 6 out of the connection hole between the leg body 5 and the second movable leg 2. The first leg pin 6 and the pressure plate 8 are connected by bolts to ensure that they move synchronously, thereby realizing the quick insertion and removal of the first leg pin 6. When the piston retracts, it drives the pressure plate 8 and the first leg pin 6 to move inward, thereby allowing the first leg pin 6 to be reinserted into the connection hole, fixing the leg body 5 and the second movable leg 2 together to form a stable support structure.

[0038] In this embodiment, the fitting relationship of each leg segment is not fixed. For example, the second movable leg 2 can also be inserted into the box-shaped extended leg 3.

[0039] In some possible implementations, such as Figure 6 The extended support leg 3 shown is hinged to the cylinder mounting section 4 via the second pin cylinder group 7, as... Figure 4 The second movable support leg 2 shown is hinged to the cylinder mounting section 4 via the second pin cylinder group 7. In this embodiment, regardless of the connection method used, the cylinder mounting section 4 is used as a separate hinge point for flexible configuration with different support legs.

[0040] In some possible implementations, such as Figure 3 The mounting section body 9 shown has a corresponding pin hole at the end near the extended support leg 3 or the second movable support leg 2, and is connected to the extended support leg 3 through the second support leg pin 6; The second set of hydraulic cylinders 7 is connected to the second support leg pin 6 via a pressure plate 8.

[0041] In this embodiment, the working process of the second pin cylinder group 7 is the same as that of the first pin cylinder group 7. Through the coordinated action of the second support leg pin 6 and the second pin cylinder group 7, reliable hinge and quick disassembly and assembly of the extended support leg 3 or the second movable support leg 2 are achieved.

[0042] The cylinder mounting section 4 can also have pin holes, and the support leg pin 6 and the second pin cylinder 7 are designed to fit at the end of the extended support leg 3.

[0043] In some possible implementations, such as Figure 5 The storage box 12 shown is square, with an opening on the side facing the support leg assembly that communicates with the outside. In this embodiment, the width of the opening needs to be greater than the width of the support leg assembly, and the height needs to be greater than the height of the vertical hydraulic cylinder 10, so as to directly accommodate the linearly retracted support leg assembly and support mechanism. Baffles are also provided on both sides of the opening to prevent dust and rainwater from entering the box.

[0044] In some possible implementations, such as Figure 7The storage rack 13 shown is located on one side of the storage box 12. The storage rack 13 is composed of one or more box-shaped structures, and both ends of each box-shaped structure are connected to the outside. The cross-section inside each box is larger than that of the extended support leg 3, in order to accommodate the extended support leg 3; The longitudinal arrangement of one or more box-shaped structures ensures that the storage rack 13 does not occupy the lateral space of the vehicle frame, thus meeting the vehicle width restriction requirements.

[0045] In some possible implementations, the extended support leg 3 is stepped, with the smallest cross-sectional area at the mating end with the second movable support leg 2. In this embodiment, the cross-sectional area gradually increases from the mating end to the middle, and the stress at the mating end is dispersed through the stepped transition, thereby improving the rigidity and bending resistance of the support leg and further adapting to different load conditions.

[0046] In some possible implementations, the first and second sets of pin cylinders 7 can also be replaced by motor drives. Example

[0047] This embodiment provides a method for using an articulated extended outrigger, including: When the crane is traveling, the cylinder mounting section and the second movable outrigger are retracted into the first movable outrigger in sequence, the first movable outrigger is retracted into the storage box, and the extended outrigger is placed on the storage rack and moves with the vehicle. When the crane is in operation, the first and second movable outriggers extend to support the entire vehicle; When the crane's operating range is expanded, the extended outriggers are placed and connected to the second movable outriggers and the cylinder mounting section to extend the range of support for the entire vehicle. After the operation is completed, the extended outriggers are disassembled, placed back into the storage rack, and the cylinder mounting section, the second movable outriggers, and the first movable outriggers are retracted into the storage box to make the vehicle width less than 3 meters.

[0048] In this embodiment, the storage and removal process of the extended outriggers can be carried out by the crane itself without the need for additional equipment. Example

[0049] This embodiment provides a crane, including the articulated extended outriggers described in Embodiment 1.

[0050] In summary, this invention achieves high-performance lifting operations through a combination of movable outriggers and detachable extended outriggers. Both the movable and extended outriggers can be housed in a storage assembly, meeting width restrictions during vehicle movement. This invention provides two outrigger installation methods depending on the crane's condition, allowing users to easily and quickly choose the appropriate replacement based on operational requirements. Furthermore, this invention offers a vehicle-mountable method for the extended outriggers; their storage and removal can be performed automatically within the crane's own structure, eliminating the need for additional equipment and effectively reducing customer operating costs.

[0051] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0052] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

Claims

1. A hinged extended support leg, characterized in that, include: The support assembly includes a first movable support leg, a second movable support leg connected to the end of the first movable support leg, and an extended support leg detachably connected to the end of the second movable support leg. The support mechanism, connected to one end of the outrigger assembly, includes a cylinder mounting section installed at the end of the second movable outrigger or extended outrigger, a vertical cylinder connected to the cylinder mounting section, and a foot connected to the power end of the vertical cylinder. Storage components, mounted on the vehicle frame, include a storage box and a storage rack respectively connected to the vehicle frame; The storage box is used to house the retractable support leg assembly and support mechanism, and the storage rack is used to house the extended support legs.

2. The articulated extended outrigger according to claim 1, characterized in that, The first movable leg has a through-hole at one end near the second movable leg, and is inserted into the second movable leg through the through-hole; The opening has reinforcing plates on three sides, and triangular notches are provided on the reinforcing plates on the sides. The first movable leg is also provided with multiple limiting holes for limiting the second movable leg by means of a limiting pin.

3. The articulated extended outrigger according to claim 1, characterized in that, The extended outrigger includes an outrigger body, a first pin cylinder assembly and a second pin cylinder assembly respectively connected within the outrigger body, and a first outrigger pin assembly and a second outrigger pin assembly respectively inserted into the outrigger body. The first pin cylinder assembly is connected to the first support leg pin shaft via a pressure plate.

4. The articulated extended outrigger according to claim 3, characterized in that, The extended support leg or the second movable support leg is hinged to the cylinder mounting section via the second pin cylinder assembly.

5. The articulated extended outrigger according to claim 3, characterized in that, The cylinder mounting section is provided with a corresponding pin hole at the end near the extended support leg or the second movable support leg, and is connected to the extended support leg through the second support leg pin. The second pin cylinder assembly is connected to the second support leg pin shaft via a pressure plate.

6. The articulated extended support leg according to claim 1, characterized in that, The storage box is square, and has an opening on the side facing the support leg assembly that connects to the outside.

7. The articulated extended outrigger according to claim 1, characterized in that, The storage rack is located on one side of the storage box. The storage rack is composed of one or more box-shaped structures, and both ends of each box-shaped structure are connected to the outside. The internal cross-section of each box is larger than that of the extended legs to accommodate the extended legs; The one or more box-shaped structures are arranged longitudinally.

8. The articulated extended outrigger according to claim 1, characterized in that, The extended support leg is stepped, and the cross-sectional area of ​​the end that mates with the second movable support leg is the smallest.

9. A method for using an articulated extended outrigger, characterized in that, Based on the articulated extended outrigger according to any one of claims 1 to 8, the method includes: When the crane is in motion, the hydraulic cylinder mounting section and the second movable outrigger are retracted into the first movable outrigger in sequence, the first movable outrigger is retracted into the storage box, and the extended outrigger is placed on the storage rack and moves with the vehicle. When the crane is in operation, the first and second movable outriggers extend to support the entire vehicle; When the crane's operating range is expanded, the extended outriggers are placed and connected to the second movable outriggers and the cylinder mounting section to extend the range of support for the entire vehicle. After the operation is completed, the extended outriggers are disassembled, placed back into the storage rack, and the cylinder mounting section, the second movable outriggers, and the first movable outriggers are retracted into the storage box to make the vehicle width less than 3 meters.

10. A crane, characterized in that, Includes the articulated extended support leg as described in any one of claims 1 to 8.

Images